/* ===== Parlarina Intro Page ===== */
/* Uses variables from base/variables.css — zero hardcoded colors */

/* --- Base & Layout --- */
.intro-page {
    background: var(--white);
    color: var(--gray-800);
    min-height: 100vh;
    overflow-x: hidden;
    font-family: 'Inter', 'Plus Jakarta Sans', system-ui, sans-serif;
    line-height: 1.6;
}

.intro-page *,
.intro-page *::before,
.intro-page *::after {
    box-sizing: border-box;
}

.intro-section {
    padding: 3.5rem 2.5rem;
    position: relative;
}

.intro-section:nth-child(even) {
    background: var(--gray-50);
}

.intro-section > .intro-station-header,
.intro-section > .intro-practice-layout,
.intro-section > .intro-grow-layout,
.intro-section > .intro-connection,
.intro-section > .intro-info-card,
.intro-section > .intro-modes {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* Panel inner max-widths (panels are inside .intro-showcase which has max-width: 1200px) */
.intro-panel .intro-conv-demo {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.intro-panel .intro-modes {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.intro-panel .intro-decode-demo {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.intro-panel .intro-info-card {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1.5rem;
}

.intro-panel .intro-connection {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 1.5rem;
}

.intro-panel .intro-exercise-demo {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.intro-panel .intro-lernpfad-map {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Top Bar --- */
.intro-topbar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    transition: var(--transition);
}

.intro-topbar-inner {
    padding: 1rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.intro-topbar-left {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.intro-topbar-logo {
    font-family: 'DynaPuff', cursive;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 500;
    color: var(--primary-text);
    text-decoration: none;
}

.intro-topbar-left .intro-how-steps {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.intro-topbar-left .intro-how-step {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.intro-topbar-left .intro-how-step i {
    font-size: 0.8rem;
    color: var(--primary-light, var(--primary));
}

.intro-topbar-left .intro-how-step span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-text);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.intro-topbar-left .intro-how-arrow {
    color: var(--gray-500);
    font-size: 0.65rem;
}

@media (max-width: 900px) {
    .intro-topbar-left .intro-how-steps {
        display: none;
    }
}

.intro-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.intro-lang-switcher {
    display: flex;
    gap: 0.25rem;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    padding: 0.2rem;
}

.intro-lang-btn {
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--gray-500);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-lang-btn.active {
    background: var(--primary-dark);
    color: var(--on-primary);
}

.intro-theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-200);
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.intro-theme-toggle:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.intro-login-btn {
    padding: 0.45rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--primary-text);
    background: transparent;
    color: var(--primary-text);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-fast);
}

.intro-login-btn:hover {
    background: var(--primary);
    color: var(--on-primary);
}

/* --- Showcase Section (Tab-based) --- */
.intro-showcase {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2.5rem 4rem;
}

.intro-showcase > h2 {
    text-align: center;
    font-family: 'DynaPuff', cursive;
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--gray-800);
    margin-bottom: 2rem;
}

/* Tab Bar */
.intro-tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 2px solid var(--gray-200);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    margin-bottom: 2rem;
}

.intro-tabs::-webkit-scrollbar {
    display: none;
}

.intro-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border: none;
    background: none;
    color: var(--gray-500);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition-fast);
    white-space: nowrap;
    font-family: inherit;
    margin-bottom: -2px;
}

.intro-tab i {
    font-size: 1rem;
}

.intro-tab:hover {
    color: var(--gray-700);
}

.intro-tab.active {
    color: var(--primary-text);
    border-bottom-color: var(--primary-text);
}

/* Panels */
.intro-panel {
    display: none;
}

.intro-panel.active {
    display: block;
    animation: intro-panel-fade 0.3s ease;
}

@keyframes intro-panel-fade {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Station 1: Hero --- */
.intro-hero {
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 4rem 2rem;
    padding-top: 5.5rem;
    position: relative;
    overflow: hidden;
}

.intro-hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.12) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: intro-pulse 6s ease-in-out infinite;
}

@keyframes intro-pulse {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

@keyframes intro-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Hero Content: Text left + Orbit right */
.intro-hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(2rem, 4vw, 4rem);
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1300px;
}

.intro-hero-text {
    text-align: left;
    flex: 1;
    min-width: 0;
    max-width: 440px;
}

.intro-hero-text h1 {
    font-family: 'DynaPuff', cursive;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 500;
    margin: 0 0 0.75rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-hero-text > p {
    font-size: 1.05rem;
    color: var(--gray-600);
    margin: 0 0 1.25rem;
    line-height: 1.6;
}

.intro-hero-philosophy-link-wrap {
    margin: -0.25rem 0 0.9rem;
}

.intro-hero-philosophy-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.32rem 0.72rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--primary-border);
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary-text);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
}

.intro-hero-philosophy-link:hover {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary-light);
}

/* --- Orbit --- */
.intro-orbit {
    --orbit-size: clamp(460px, 46vw, 640px);
    --orbit-radius: calc(var(--orbit-size) * 0.39);
    --card-width: calc(var(--orbit-size) * 0.22);
    width: var(--orbit-size);
    height: var(--orbit-size);
    position: relative;
    flex-shrink: 0;
}

.intro-orbit-mascot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: calc(var(--orbit-size) * 0.18);
    height: calc(var(--orbit-size) * 0.18);
    z-index: 2;
    animation: intro-orbit-mascot-float 4s ease-in-out infinite;
}

@keyframes intro-orbit-mascot-float {
    0%, 100% { transform: translate(-50%, -50%) translateY(0); }
    50% { transform: translate(-50%, -50%) translateY(-6px); }
}

.intro-orbit-radar {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.intro-orbit-radar .intro-radar-shape {
    animation: intro-radar-pulse 4s ease-in-out infinite;
}

@keyframes intro-radar-pulse {
    0%, 100% { opacity: 0.25; }
    50% { opacity: 0.15; }
}

.intro-method-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: clamp(0.6rem, 1.2vw, 0.95rem) clamp(0.5rem, 1vw, 0.8rem);
    border-radius: var(--radius-lg);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
    opacity: 0;
    animation: intro-card-appear 0.4s ease forwards;
}

.intro-method-card i {
    font-size: clamp(1.3rem, 2.2vw, 2rem);
    color: var(--primary);
    transition: var(--transition-fast);
}

.intro-method-card .intro-method-name {
    font-size: clamp(0.82rem, 1.3vw, 1.15rem);
    font-weight: 600;
    color: var(--gray-700);
    text-align: center;
    line-height: 1.2;
}

.intro-method-card:hover {
    background: var(--primary-bg);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.intro-method-card:hover i {
    transform: scale(1.15);
}

/* Hover expands card on devices with hover support (desktop) */
@media (hover: hover) {
    .intro-orbit-item:hover {
        z-index: 10;
        width: calc(var(--card-width) * 1.6);
        box-shadow: var(--shadow-lg);
        transform: translate(-50%, -50%) scale(1.1);
    }

    .intro-orbit-item:hover .intro-method-detail {
        max-height: 150px;
        opacity: 1;
        margin-top: 0.3rem;
    }
}

@keyframes intro-card-appear {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.intro-orbit-item {
    --a: calc(var(--angle) * 45deg - 90deg);
    position: absolute;
    left: calc(50% + cos(var(--a)) * var(--orbit-radius));
    top: calc(50% + sin(var(--a)) * var(--orbit-radius));
    transform: translate(-50%, -50%);
    width: var(--card-width);
}

.intro-orbit-item[style*="--angle: 0"] { animation-delay: 0.1s; }
.intro-orbit-item[style*="--angle: 1"] { animation-delay: 0.2s; }
.intro-orbit-item[style*="--angle: 2"] { animation-delay: 0.3s; }
.intro-orbit-item[style*="--angle: 3"] { animation-delay: 0.4s; }
.intro-orbit-item[style*="--angle: 4"] { animation-delay: 0.5s; }
.intro-orbit-item[style*="--angle: 5"] { animation-delay: 0.6s; }
.intro-orbit-item[style*="--angle: 6"] { animation-delay: 0.7s; }
.intro-orbit-item[style*="--angle: 7"] { animation-delay: 0.8s; }

/* --- Orbit Card Expanded State --- */
.intro-method-detail {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    width: 100%;
}

.intro-method-desc {
    font-size: clamp(0.72rem, 1.1vw, 0.88rem);
    color: var(--gray-600);
    line-height: 1.4;
    margin: 0;
    text-align: center;
}

.intro-method-try {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    font-size: clamp(0.75rem, 1.1vw, 0.88rem);
    cursor: pointer;
    margin-top: 0.35rem;
    transition: var(--transition-fast);
}

.intro-method-try:hover {
    text-decoration: underline;
}

.intro-method-card.expanded {
    z-index: 10;
    width: calc(var(--card-width) * 1.6);
    background: var(--primary-bg);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translate(-50%, -50%) scale(1.1);
}

.intro-method-card.expanded .intro-method-detail {
    max-height: 150px;
    opacity: 1;
    margin-top: 0.3rem;
}

.intro-method-card.expanded i {
    transform: scale(1.15);
}

/* Backdrop overlay when a card is expanded */
.intro-orbit-backdrop {
    position: absolute;
    inset: 0;
    background: var(--modal-overlay);
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 5;
}

.intro-orbit.has-expanded .intro-orbit-backdrop {
    opacity: 1;
}

/* Language Flags with label */
.intro-hero-languages {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.intro-hero-languages-label {
    font-size: 0.85rem;
    color: var(--gray-500);
    font-weight: 500;
}

.intro-flags {
    display: flex;
    gap: 0.5rem;
}

.intro-flag {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: 2px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-fast);
    cursor: default;
}

.intro-flag:hover {
    border-color: var(--primary);
    transform: scale(1.1);
}

/* How It Works — compact strip */

/* Hero CTA */
.intro-cta-group {
    display: flex;
    gap: 0.75rem;
    position: relative;
    z-index: 1;
}

.intro-cta-primary {
    padding: 0.85rem 2rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.intro-cta-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.intro-cta-secondary {
    padding: 0.85rem 2rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-300);
    background: transparent;
    color: var(--gray-700);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.intro-cta-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* --- Hero signup CTA line --- */
.intro-hero-signup-cta {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
    margin-bottom: 0.25rem;
}

/* --- Free Tool Card (Hanzi Trainer) --- */
.intro-free-tool-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--gray-800);
    transition: var(--transition);
    margin-bottom: 2rem;
    margin-left: auto;
    position: relative;
    max-width: 300px;
}

.intro-free-tool-card:hover {
    border-color: var(--primary);
    background: var(--primary-bg, var(--gray-50));
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.intro-free-tool-badge {
    position: absolute;
    top: -0.5rem;
    right: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    /*background: var(--success);*/
    /*color: var(--on-primary);*/
    background: var(--primary-dark);
    color: var(--on-primary);



    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.4;
}

.intro-free-tool-hanzi {
    font-size: 2rem;
    color: var(--primary);
    line-height: 1;
    flex-shrink: 0;
}

.intro-free-tool-text {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.intro-free-tool-text strong {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gray-900);
}

.intro-free-tool-text span {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.intro-free-tool-arrow {
    margin-left: auto;
    color: var(--gray-400);
    font-size: 0.85rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.intro-free-tool-card:hover .intro-free-tool-arrow {
    color: var(--primary);
    transform: translateX(2px);
}

@media (max-width: 480px) {
    .intro-free-tool-card {
        max-width: 100%;
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
    }

    .intro-free-tool-hanzi {
        font-size: 1.6rem;
    }
}

/* --- Coming Soon Badge --- */
.intro-coming-soon {
    display: inline-block;
    padding: 0.3rem 1rem;
    border-radius: var(--radius-full);
    background: var(--primary-dark);
    color: var(--on-primary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
    width: 100%;
    text-align: center;
}

/* --- Newsletter Form --- */
.intro-newsletter-form {
    display: flex;
    gap: 0.5rem;
    max-width: 440px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.intro-newsletter-input {
    flex: 1;
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-800);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

.intro-newsletter-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg, rgba(108, 92, 231, 0.1));
}

.intro-newsletter-input::placeholder {
    color: var(--gray-400);
}

.intro-newsletter-submit {
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary-dark);
    color: var(--on-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.intro-newsletter-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.intro-newsletter-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.intro-newsletter-consent {
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 0.35rem;
    font-size: 0.8rem;
    color: var(--gray-600);
    line-height: 1.4;
}

.intro-newsletter-consent input[type="checkbox"] {
    margin-top: 0.15rem;
    accent-color: var(--primary);
}

.intro-newsletter-consent a {
    color: var(--primary-text);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.intro-newsletter-consent a:hover {
    color: var(--primary-dark);
}

.intro-newsletter-success {
    color: var(--success);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

.intro-newsletter-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.intro-footer-newsletter {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.intro-footer-newsletter .intro-newsletter-form {
    justify-content: center;
}

/* --- Station 2: Conversation Demo --- */
.intro-station-header {
    text-align: center;
    margin-bottom: 1.75rem;
}

.intro-station-header .station-number {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.intro-station-header h2 {
    font-family: 'DynaPuff', cursive;
    font-size: 2rem;
    font-weight: 500;
    color: var(--gray-900);
    margin: 0 0 0.5rem;
}

.intro-station-header p {
    color: var(--gray-500);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Conversation Demo */
.intro-conv-demo {
    max-width: 680px;
    margin: 0 auto;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-conv-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.intro-conv-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.intro-conv-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
}

.intro-conv-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gray-900);
}

.intro-conv-status {
    font-size: 0.75rem;
    color: var(--success);
}

.intro-conv-header-right {
    display: flex;
    gap: 0.5rem;
}

.intro-conv-action-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    background: transparent;
    color: var(--gray-400);
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    position: relative;
}

.intro-conv-action-btn:hover {
    color: var(--gray-700);
    background: var(--gray-100);
}

.intro-conv-action-btn .tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-900);
    color: var(--on-primary);
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    pointer-events: none;
}

.intro-conv-action-btn:hover .tooltip {
    display: block;
}

.intro-conv-messages {
    padding: 1rem;
    min-height: 300px;
    max-height: 420px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    scroll-behavior: smooth;
}

/* Chat Messages */
.intro-msg {
    max-width: 85%;
    animation: intro-msg-appear 0.3s ease;
}

@keyframes intro-msg-appear {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.intro-msg-ai {
    align-self: flex-start;
}

.intro-msg-user {
    align-self: flex-end;
}

.intro-msg-bubble {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
}

.intro-msg-ai .intro-msg-bubble {
    background: var(--white);
    color: var(--gray-800);
    border: 1px solid var(--gray-200);
    border-bottom-left-radius: var(--radius-sm);
}

.intro-msg-user .intro-msg-bubble {
    background: var(--primary);
    color: var(--on-primary);
    border-bottom-right-radius: var(--radius-sm);
}

.intro-msg-actions {
    display: flex;
    gap: 0.25rem;
    margin-top: 0.4rem;
}

.intro-msg-action {
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    background: transparent;
    color: var(--gray-400);
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-msg-action:hover {
    color: var(--gray-700);
    background: var(--gray-100);
}

/* Correction Bubble */
.intro-correction {
    margin-top: 0.5rem;
    padding: 0.6rem 0.8rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: var(--radius);
    font-size: 0.8rem;
}

.intro-correction-label {
    font-weight: 700;
    color: var(--success-text);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.2rem;
}

.intro-correction del {
    color: var(--danger);
    text-decoration: line-through;
}

.intro-correction ins {
    color: var(--success-text);
    text-decoration: none;
    font-weight: 600;
}

.intro-correction-explain {
    color: var(--gray-600);
    font-size: 0.78rem;
    margin-top: 0.25rem;
    font-style: italic;
}

/* Translation Toggle */
.intro-translation {
    margin-top: 0.4rem;
    padding: 0.4rem 0.6rem;
    background: var(--info-bg);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    color: var(--info-text);
    display: none;
}

.intro-translation.visible {
    display: block;
}

/* Typing Indicator */
.intro-typing {
    display: flex;
    gap: 4px;
    padding: 0.75rem 1rem;
    align-self: flex-start;
}

.intro-typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-300);
    animation: intro-typing-bounce 1.4s ease-in-out infinite;
}

.intro-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.intro-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes intro-typing-bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* User Options */
.intro-conv-options {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--gray-200);
    background: var(--white);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.intro-conv-option {
    padding: 0.65rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-700);
    font-size: 0.85rem;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-fast);
}

.intro-conv-option:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.intro-conv-input-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-top: 1px solid var(--gray-200);
    background: var(--white);
}

.intro-conv-input-placeholder {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    background: var(--gray-100);
    color: var(--gray-400);
    font-size: 0.85rem;
}

.intro-conv-mic-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.intro-conv-mic-btn .tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-900);
    color: var(--on-primary);
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    pointer-events: none;
}

.intro-conv-mic-btn:hover .tooltip {
    display: block;
}

/* Mode Badges */
.intro-modes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.intro-mode-badge {
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
    background: var(--gray-100);
}

.intro-mode-badge.active {
    border-color: var(--primary-text);
    color: var(--primary-text);
    background: var(--primary-bg);
}

/* --- Station 3: Decode / Understand --- */
.intro-decode-demo {
    max-width: 720px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-decode-tabs {
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
    scrollbar-width: none;
}

.intro-decode-tabs::-webkit-scrollbar {
    display: none;
}

.intro-decode-tab {
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    color: var(--gray-400);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.intro-decode-tab:hover {
    color: var(--gray-700);
}

.intro-decode-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: var(--white);
}

.intro-decode-tab.disabled {
    opacity: 0.4;
    cursor: default;
}

.intro-decode-content {
    padding: 1.5rem;
    min-height: 200px;
}

.intro-decode-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

/* Decode: Interlinear word pairs */
.intro-decode-sentence {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 0.5rem;
    margin-bottom: 0.75rem;
}

.intro-decode-word-pair {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    border-radius: var(--radius);
    transition: var(--transition-fast);
    user-select: none;
}

.intro-decode-word-pair:hover {
    background: var(--gray-100);
}

.intro-decode-foreign {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.3;
}

.intro-decode-native {
    font-size: 0.8rem;
    color: var(--primary);
    line-height: 1.3;
    min-height: 1.1em;
    transition: opacity 0.2s ease;
}

/* Decode tab: hidden = translation hidden */
.intro-decode-word-pair[data-revealed="false"] .intro-decode-native {
    visibility: hidden;
}

.intro-decode-word-pair[data-revealed="false"] {
    background: var(--gray-100);
}

/* Reverse tab: foreign hidden when not revealed */
.intro-decode-word-pair.reverse[data-revealed="false"] .intro-decode-foreign {
    visibility: hidden;
}

.intro-decode-word-pair.reverse[data-revealed="false"] .intro-decode-native {
    visibility: visible;
}

.intro-decode-word-pair.reverse[data-revealed="true"] {
    background: var(--success-bg);
}

/* Hint text */
.intro-decode-hint {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-bottom: 0.75rem;
    font-style: italic;
}

/* Audio player row */
.intro-decode-player {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
}

.intro-decode-play-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.intro-decode-play-btn:hover {
    background: var(--primary);
    color: var(--on-primary);
}

.intro-decode-play-btn.playing {
    background: var(--primary);
    color: var(--on-primary);
}

.intro-decode-player-label {
    font-size: 0.85rem;
    color: var(--gray-700);
}

.intro-decode-speed {
    margin-left: auto;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-700);
    font-size: 0.8rem;
    cursor: pointer;
}

.intro-decode-progress {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.intro-decode-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.intro-decode-progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* Cloze */
.intro-cloze-text {
    line-height: 2.4;
    font-size: 0.95rem;
}

.intro-cloze-gap {
    display: inline-block;
    min-width: 80px;
    border-bottom: 2px solid var(--primary);
    padding: 0.15rem 0.3rem;
    margin: 0 0.1rem;
    text-align: center;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-bg);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-cloze-gap.filled {
    background: var(--success-bg);
    border-bottom-color: var(--success);
    color: var(--success-text);
}

.intro-cloze-gap.wrong {
    background: var(--danger-bg);
    border-bottom-color: var(--danger);
    color: var(--danger-text);
}

.intro-cloze-input {
    display: inline-block;
    min-width: 80px;
    width: auto;
    border: none;
    border-bottom: 2px solid var(--primary);
    padding: 0.15rem 0.3rem;
    text-align: center;
    font-weight: 600;
    font-size: inherit;
    font-family: inherit;
    color: var(--primary);
    background: var(--primary-bg);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    outline: none;
}

.intro-cloze-input:focus {
    border-bottom-color: var(--primary-dark);
    background: rgba(var(--primary-rgb), 0.12);
}

.intro-cloze-input.correct {
    background: var(--success-bg);
    border-bottom-color: var(--success);
    color: var(--success-text);
}

.intro-cloze-input.wrong {
    background: var(--danger-bg);
    border-bottom-color: var(--danger);
    color: var(--danger-text);
}

/* Birkenbihl Info Card */
.intro-info-card {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: var(--info-bg);
    border: 1px solid var(--info-border);
    border-radius: var(--radius-lg);
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.intro-info-card-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.intro-info-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--info-text);
    margin: 0 0 0.3rem;
}

.intro-info-card p {
    font-size: 0.82rem;
    color: var(--gray-600);
    margin: 0;
    line-height: 1.5;
}

/* Decode Tab Names */
.intro-decode-tab-names {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1.5rem;
    justify-content: center;
}

.intro-decode-tab-badge {
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    color: var(--gray-500);
    background: var(--white);
}

/* --- Station 4: Practice & Lernpfad --- */
.intro-practice-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

/* Lernpfad SVG Map Preview */
.intro-lernpfad-map {
    width: 100%;
    height: 500px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #1e1e3a;
    position: relative;
}

.intro-lernpfad-map svg {
    width: 100%;
    height: 100%;
}

@keyframes intro-map-pulse {
    0%, 100% { r: 22; opacity: 0.5; }
    50% { r: 30; opacity: 0; }
}

.intro-map-pulse-ring {
    animation: intro-map-pulse 2s ease-in-out infinite;
}

/* Zoom controls overlay */
.intro-map-zoom-controls {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(30, 30, 58, 0.85);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 4px 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 2;
}

.intro-map-zoom-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 11px;
    transition: background 0.15s, color 0.15s;
}

.intro-map-zoom-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.95);
}

.intro-map-zoom-slider {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.intro-map-zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #6C5CE7;
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
}

.intro-map-zoom-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #6C5CE7;
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
}

/* Node click popup */
.intro-map-popup {
    position: absolute;
    transform: translate(-50%, -100%);
    background: rgba(30, 30, 58, 0.95);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(108, 92, 231, 0.4);
    border-radius: 10px;
    padding: 10px 16px;
    z-index: 3;
    pointer-events: auto;
    animation: intro-popup-in 0.2s ease-out;
    white-space: nowrap;
}

.intro-map-popup::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 10px;
    height: 10px;
    background: rgba(30, 30, 58, 0.95);
    border-right: 1px solid rgba(108, 92, 231, 0.4);
    border-bottom: 1px solid rgba(108, 92, 231, 0.4);
}

.intro-map-popup.fade-out {
    animation: intro-popup-out 0.3s ease-in forwards;
}

.intro-map-popup-title {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 4px;
}

.intro-map-popup-loading {
    font-size: 12px;
    color: #6C5CE7;
}

.intro-map-popup-loading i {
    margin-right: 4px;
}

@keyframes intro-popup-in {
    from { opacity: 0; transform: translate(-50%, -90%); }
    to { opacity: 1; transform: translate(-50%, -100%); }
}

@keyframes intro-popup-out {
    from { opacity: 1; transform: translate(-50%, -100%); }
    to { opacity: 0; transform: translate(-50%, -110%); }
}

/* Exercise Demo */
.intro-exercise-demo {
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-exercise-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.intro-exercise-type {
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    background: var(--accent);
    color: var(--on-primary);
}

.intro-exercise-progress-dots {
    display: flex;
    gap: 0.3rem;
}

.intro-exercise-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-200);
}

.intro-exercise-dot.active {
    background: var(--primary);
}

.intro-exercise-dot.done {
    background: var(--success);
}

.intro-exercise-body {
    padding: 1.5rem 1.25rem;
}

.intro-exercise-question {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.25rem;
}

.intro-exercise-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.intro-exercise-option {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-700);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.intro-exercise-option:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-exercise-option.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-exercise-option.wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-exercise-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

/* Gap Fill Exercise */
.intro-exercise-gap-input {
    display: inline-block;
    min-width: 120px;
    border: none;
    border-bottom: 2px solid var(--primary);
    padding: 0.3rem 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-900);
    background: transparent;
    outline: none;
    text-align: center;
}

.intro-exercise-gap-input:focus {
    border-bottom-color: var(--primary-dark);
}

.intro-exercise-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.intro-exercise-next {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-exercise-next:hover {
    background: var(--primary-dark);
}

.intro-exercise-next:disabled {
    opacity: 0.4;
    cursor: default;
}

/* --- Station 5: Games --- */
.intro-games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-bottom: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.intro-game-card {
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    background: var(--white);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-game-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.intro-game-card.active {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-game-card .game-icon {
    font-size: 1.3rem;
    margin-bottom: 0.4rem;
    color: var(--primary);
    opacity: 0.8;
}

.intro-game-card.active .game-icon {
    opacity: 1;
}

.intro-game-card .game-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gray-700);
}


/* Scramble Game */
.intro-scramble {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.intro-scramble-hint {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}

.intro-scramble-translation {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.intro-scramble-letters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.intro-scramble-letter {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-900);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    user-select: none;
}

.intro-scramble-letter:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-scramble-letter.used {
    opacity: 0.3;
    pointer-events: none;
}

.intro-scramble-answer {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    min-height: 48px;
    padding: 0.5rem;
    border-radius: var(--radius);
    background: var(--gray-50);
    border: 2px dashed var(--gray-200);
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.intro-scramble-answer .intro-scramble-letter {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
}

.intro-scramble-result {
    font-size: 0.9rem;
    font-weight: 600;
    min-height: 1.5em;
}

.intro-scramble-result.correct {
    color: var(--success-text);
}

.intro-scramble-result.wrong {
    color: var(--danger-text);
}

/* Shared game utilities */
.intro-game-counter {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.intro-game-win {
    color: var(--success-text);
    font-weight: 700;
    font-size: 0.95rem;
}

/* Gap Fill */
.intro-gapfill {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.intro-gapfill-sentence {
    font-size: 1.15rem;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.intro-gapfill-blank {
    display: inline-block;
    min-width: 80px;
    padding: 0.15rem 0.5rem;
    border-bottom: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 700;
}

.intro-gapfill-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.intro-gapfill-option {
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-full);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-gapfill-option:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-gapfill-option.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-gapfill-option.wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-gapfill-feedback {
    font-size: 0.9rem;
    font-weight: 600;
    min-height: 1.5em;
    color: var(--gray-500);
}

/* Wordle */
.intro-wordle {
    max-width: 360px;
    margin: 0 auto;
    text-align: center;
}

.intro-wordle-board {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 1rem;
}

.intro-wordle-row {
    display: flex;
    gap: 4px;
    justify-content: center;
}

.intro-wordle-cell {
    width: 48px;
    height: 48px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    color: var(--gray-800);
    background: var(--white);
}

.intro-wordle-cell.current {
    border-color: var(--gray-400);
}

.intro-wordle-cell.correct {
    background: var(--success);
    color: var(--on-primary);
    border-color: var(--success);
}

.intro-wordle-cell.present {
    background: var(--warning);
    color: var(--gray-900);
    border-color: var(--warning);
}

.intro-wordle-cell.absent {
    background: var(--gray-300);
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.intro-wordle-keyboard {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 0.75rem;
}

.intro-wordle-kb-row {
    display: flex;
    gap: 3px;
    justify-content: center;
}

.intro-wordle-key {
    min-width: 28px;
    height: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    text-transform: uppercase;
    transition: var(--transition-fast);
}

.intro-wordle-key.wide {
    min-width: 50px;
    font-size: 0.7rem;
}

.intro-wordle-key:hover {
    background: var(--primary-bg);
    border-color: var(--primary);
}

.intro-wordle-result {
    font-weight: 700;
    color: var(--gray-800);
    margin-top: 0.5rem;
}

/* Word Rain */
.intro-wordrain {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-wordrain-timer {
    height: 6px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.intro-wordrain-bar {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.intro-wordrain-word {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.intro-wordrain-prompt {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.intro-wordrain-input {
    width: 100%;
    max-width: 300px;
    padding: 0.6rem 1rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-size: 1rem;
    text-align: center;
}

.intro-wordrain-input:focus {
    border-color: var(--primary);
    outline: none;
}

.intro-wordrain-score {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--gray-500);
}

.intro-wordrain-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Speed Quiz */
.intro-speedquiz {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-speedquiz-word {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.intro-speedquiz-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.intro-speedquiz-option {
    padding: 0.75rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-speedquiz-option:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-speedquiz-option.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-speedquiz-option.wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-speedquiz-score {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.intro-speedquiz-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Snap */
.intro-snap {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-snap-word {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.intro-snap-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.intro-snap-option {
    padding: 0.75rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-snap-option:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-snap-option.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-snap-option.wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-snap-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Audio Blitz */
.intro-audioblitz {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-audioblitz-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.intro-audioblitz-phonetic {
    font-size: 1.3rem;
    color: var(--gray-600);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.intro-audioblitz-prompt {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.intro-audioblitz-input {
    width: 100%;
    max-width: 300px;
    padding: 0.6rem 1rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-size: 1rem;
    text-align: center;
    margin-bottom: 0.75rem;
}

.intro-audioblitz-input:focus {
    border-color: var(--primary);
    outline: none;
}

.intro-audioblitz-check {
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-audioblitz-check:hover {
    opacity: 0.9;
}

.intro-audioblitz-feedback {
    margin-top: 0.75rem;
    font-weight: 600;
    min-height: 1.5em;
}

.intro-audioblitz-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Dictation */
.intro-dictation {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.intro-dictation-de {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
}

.intro-dictation-prompt {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.intro-dictation-input {
    width: 100%;
    padding: 0.6rem 1rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.intro-dictation-input:focus {
    border-color: var(--primary);
    outline: none;
}

.intro-dictation-check {
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-dictation-check:hover {
    opacity: 0.9;
}

.intro-dictation-feedback {
    margin-top: 0.75rem;
    font-weight: 600;
    min-height: 1.5em;
}

.intro-dictation-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Sentence Builder */
.intro-sentence {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.intro-sentence-de {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--gray-50);
    border-radius: var(--radius);
}

.intro-sentence-placed {
    min-height: 48px;
    padding: 0.5rem;
    border-radius: var(--radius);
    border: 2px dashed var(--gray-200);
    background: var(--gray-50);
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: center;
    align-items: center;
}

.intro-sentence-placeholder {
    color: var(--gray-400);
    font-size: 0.85rem;
}

.intro-sentence-pool {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.intro-sentence-word {
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-sentence-word:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-sentence-word.placed {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
}

.intro-sentence-feedback {
    font-weight: 600;
    min-height: 1.5em;
}

.intro-sentence-result {
    font-size: 1.2rem;
    padding: 2rem 0;
}

/* Connect */
.intro-connect {
    display: flex;
    gap: 2rem;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
}

.intro-connect-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.intro-connect-item {
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-connect-item:hover {
    border-color: var(--primary);
}

.intro-connect-item.selected {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
}

.intro-connect-item.matched {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
    pointer-events: none;
}

/* Hangman */
.intro-hangman {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-hangman-hint {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
    font-style: italic;
}

.intro-hangman-word {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-family: monospace;
}

.intro-hangman-lives {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    letter-spacing: 0.2em;
}

.intro-hangman-keyboard {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    margin-bottom: 1rem;
}

.intro-hangman-key {
    width: 32px;
    height: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-800);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-hangman-key:hover:not([disabled]) {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-hangman-key.correct {
    background: var(--success-bg);
    border-color: var(--success);
    color: var(--success-text);
}

.intro-hangman-key.wrong {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger-text);
}

.intro-hangman-key[disabled] {
    cursor: default;
    opacity: 0.7;
}

.intro-hangman-lost {
    color: var(--danger-text);
    font-weight: 600;
}

/* Flashcards */
.intro-flashcards {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.intro-flashcard {
    width: 100%;
    height: 180px;
    perspective: 600px;
    cursor: pointer;
    margin-bottom: 1.5rem;
    position: relative;
}

.intro-flashcard-front,
.intro-flashcard-back {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    backface-visibility: hidden;
    transition: transform 0.5s;
}

.intro-flashcard-front {
    background: var(--white);
    border: 2px solid var(--gray-200);
    color: var(--gray-900);
    transform: rotateY(0deg);
}

.intro-flashcard-back {
    background: var(--primary-bg);
    border: 2px solid var(--primary);
    color: var(--primary);
    transform: rotateY(180deg);
}

.intro-flashcard.flipped .intro-flashcard-front {
    transform: rotateY(-180deg);
}

.intro-flashcard.flipped .intro-flashcard-back {
    transform: rotateY(0deg);
}

.intro-flashcard-tap {
    font-size: 0.85rem;
    color: var(--gray-400);
}

.intro-flashcard-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.intro-flashcard-btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-full);
    border: 2px solid;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-flashcard-btn.known {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-flashcard-btn.unknown {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-flashcard-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.intro-flashcards-result {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 2rem 0;
}


/* --- Station 6: Grow --- */
.intro-grow-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

/* Vocabulary Map */
.intro-vocab-map {
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-vocab-map-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.intro-vocab-map-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gray-900);
}

.intro-vocab-zones {
    display: flex;
    gap: 0.5rem;
}

.intro-vocab-zone-legend {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    color: var(--gray-500);
}

.intro-vocab-zone-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.zone-trouble .intro-vocab-zone-dot,
.intro-vocab-zone-dot.trouble { background: var(--danger); }
.zone-new .intro-vocab-zone-dot,
.intro-vocab-zone-dot.new { background: var(--warning); }
.zone-learning .intro-vocab-zone-dot,
.intro-vocab-zone-dot.learning { background: var(--info); }
.zone-known .intro-vocab-zone-dot,
.intro-vocab-zone-dot.known { background: var(--secondary); }
.zone-mastered .intro-vocab-zone-dot,
.intro-vocab-zone-dot.mastered { background: var(--success); }

.intro-vocab-svg-container {
    padding: 1rem;
    min-height: 280px;
    position: relative;
}

.intro-vocab-svg-container svg {
    width: 100%;
    height: 260px;
}

.intro-vocab-bubble {
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-vocab-bubble:hover {
    filter: brightness(1.1);
}

.intro-vocab-tooltip {
    position: absolute;
    background: var(--gray-900);
    color: var(--on-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.78rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 10;
    max-width: 200px;
}

.intro-vocab-tooltip.visible {
    opacity: 1;
}

.intro-vocab-tooltip strong {
    display: block;
    margin-bottom: 0.15rem;
}

/* Radar Chart / Scrutinizer */
.intro-scrutinizer {
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-scrutinizer-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.intro-scrutinizer-header img {
    width: 28px;
    height: 28px;
}

.intro-scrutinizer-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gray-900);
}

.intro-radar-container {
    padding: 1.5rem;
    display: flex;
    justify-content: center;
}

.intro-radar-container svg {
    width: 220px;
    height: 220px;
}

.intro-radar-shape {
    transition: d 1s ease;
}

.intro-skill-bars {
    padding: 0 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.intro-skill-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.intro-skill-label {
    width: 90px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gray-600);
}

.intro-skill-track {
    flex: 1;
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.intro-skill-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 1.5s ease;
    width: 0;
}

.intro-skill-fill.speaking { background: var(--primary); }
.intro-skill-fill.listening { background: var(--info); }
.intro-skill-fill.grammar { background: var(--success); }
.intro-skill-fill.vocabulary { background: var(--accent); }

.intro-skill-value {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gray-500);
    min-width: 28px;
    text-align: right;
}

.intro-scrutinizer-insight {
    margin: 0 1.25rem 1.25rem;
    padding: 0.75rem 1rem;
    background: var(--primary-bg);
    border-radius: var(--radius);
    font-size: 0.82rem;
    color: var(--gray-700);
    border-left: 3px solid var(--primary);
}

/* --- Station 7: Footer / CTA --- */
.intro-footer {
    background: var(--gray-50);
    padding: 4rem 2.5rem 2rem;
    text-align: center;
}

.intro-footer-inner {
    max-width: 700px;
    margin: 0 auto;
}

.intro-footer h2 {
    font-family: 'DynaPuff', cursive;
    font-size: 2rem;
    font-weight: 500;
    color: var(--gray-900);
    margin: 0 0 0.75rem;
}

.intro-footer p {
    color: var(--gray-500);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.intro-stats-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.intro-stat-card {
    padding: 0.6rem 1rem;
    border-radius: var(--radius-full);
    background: var(--white);
    border: 1px solid var(--gray-200);
    font-size: 0.85rem;
    color: var(--gray-600);
}

.intro-stat-card strong {
    color: var(--primary-text);
    font-weight: 700;
}

.intro-beta-form {
    display: flex;
    gap: 0.5rem;
    max-width: 420px;
    margin: 0 auto 2rem;
}

.intro-beta-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-900);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.intro-beta-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.intro-beta-input::placeholder {
    color: var(--gray-400);
}

.intro-beta-submit {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    border: none;
    background: var(--primary-dark);
    color: var(--on-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.intro-beta-submit:hover {
    background: var(--primary-dark);
}

.intro-footer-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.intro-footer-link {
    color: var(--gray-500);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.intro-footer-link:hover {
    color: var(--primary);
}

.intro-footer-copy {
    margin-top: 1.5rem;
    font-size: 0.78rem;
    color: var(--gray-500);
}

/* --- Scroll Animations --- */
.intro-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.intro-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.intro-fade-in-delay-1 { transition-delay: 0.1s; }
.intro-fade-in-delay-2 { transition-delay: 0.2s; }
.intro-fade-in-delay-3 { transition-delay: 0.3s; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .intro-section {
        padding: 2.5rem 1rem;
    }

    .intro-hero {
        padding: 2.5rem 1rem 1.5rem;
        padding-top: 5rem;
    }

    .intro-hero-content {
        flex-direction: column;
        gap: 1.5rem;
    }

    .intro-hero-text {
        text-align: center;
        max-width: 100%;
    }

    .intro-hero-text > p {
        margin-left: auto;
        margin-right: auto;
    }

    .intro-newsletter-form {
        margin-left: auto;
        margin-right: auto;
    }

    .intro-hero-languages {
        justify-content: center;
    }

    .intro-orbit {
        --orbit-size: min(440px, 92vw);
        margin: 0 auto;
    }


    .intro-station-header h2 {
        font-size: 1.5rem;
    }

    .intro-practice-layout,
    .intro-grow-layout {
        grid-template-columns: 1fr;
    }

    .intro-lernpfad-map {
        height: 400px;
    }

    .intro-games-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .intro-showcase {
        padding: 2rem 1rem 3rem;
    }

    .intro-showcase > h2 {
        font-size: 1.3rem;
    }

    .intro-tab span {
        display: none;
    }

    .intro-tab {
        padding: 0.6rem 1rem;
    }

    .intro-tab i {
        font-size: 1.1rem;
    }

    .intro-cta-group {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .intro-newsletter-form {
        flex-direction: column;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }

    .intro-beta-form {
        flex-direction: column;
    }

    .intro-footer h2 {
        font-size: 1.5rem;
    }

    .intro-conv-messages {
        min-height: 250px;
        max-height: 350px;
    }
}

@media (max-width: 480px) {
    .intro-topbar-inner {
        padding: 0.5rem 0.75rem;
    }

    .intro-topbar-logo {
        font-size: 1.2rem;
    }

    .intro-hero {
        padding-top: 4.5rem;
    }

    .intro-orbit {
        --orbit-size: min(380px, 92vw);
    }

    .intro-scramble-letter {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
    }

    .intro-games-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


/* --- Speaking Demo --- */
.intro-speaking-demo {
    max-width: 600px;
    margin: 2rem auto 0;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.intro-speaking-stages {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.intro-speaking-stage {
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    color: var(--gray-400);
}

.intro-speaking-stage.active {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.intro-speaking-stage.done {
    border-color: var(--success);
    color: var(--success-text);
    background: var(--success-bg);
}

.intro-speaking-prompt {
    font-size: 1.1rem;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.intro-speaking-mic-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.intro-speaking-mic {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    border: 3px solid var(--gray-200);
    background: var(--gray-50);
    color: var(--gray-400);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: default;
    position: relative;
}

.intro-speaking-mic-label {
    font-size: 0.8rem;
    color: var(--gray-400);
    font-style: italic;
}

/* --- Connection Hints --- */
.intro-connection {
    text-align: center;
    margin-top: 2rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    background: var(--primary-bg);
    border: 1px dashed var(--primary-border);
    color: var(--gray-600);
    font-size: 0.82rem;
}

.intro-connection i {
    color: var(--primary);
    margin-right: 0.3rem;
}

/* --- Listening Demo --- */
.intro-listening-demo {
    max-width: 680px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-listening-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gray-900);
}

.intro-listening-header i {
    color: var(--primary);
}

.intro-listening-player {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.intro-listening-play {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    border: 2px solid var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.intro-listening-play:hover {
    background: var(--primary);
    color: var(--on-primary);
}

.intro-listening-play.playing {
    background: var(--primary);
    color: var(--on-primary);
    animation: intro-listening-pulse 1.5s ease-in-out infinite;
}

@keyframes intro-listening-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(var(--primary-rgb), 0.3); }
    50% { box-shadow: 0 0 0 8px rgba(var(--primary-rgb), 0); }
}

.intro-listening-wave {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 2px;
    height: 40px;
    overflow: hidden;
}

.intro-listening-bar {
    flex: 1;
    min-width: 3px;
    max-width: 6px;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    transition: height 0.15s ease, background 0.3s ease;
}

.intro-listening-bar.active {
    background: var(--primary);
}

.intro-listening-question {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.intro-listening-question-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0 0 1rem;
}

.intro-listening-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* --- Game Area (inside Games panel) --- */
.intro-game-area {
    max-width: 680px;
    margin: 0 auto;
    padding: 1.5rem 0 0;
}

.intro-game-area-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.intro-game-area-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-900);
}

.intro-game-reset {
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-500);
    font-size: 0.78rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-game-reset:hover {
    color: var(--primary);
    border-color: var(--primary);
}

/* Memory Board */
.intro-memory-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.intro-memory-card {
    aspect-ratio: 1;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    padding: 0.25rem;
    word-break: break-word;
}

.intro-memory-card.hidden-card {
    background: var(--primary-bg);
    border: 2px solid var(--primary);
    color: transparent;
}

.intro-memory-card.hidden-card::after {
    content: '?';
    color: var(--primary);
    font-size: 1.2rem;
}

.intro-memory-card.hidden-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.intro-memory-card.revealed {
    background: var(--white);
    border: 2px solid var(--gray-300);
    color: var(--gray-900);
}

.intro-memory-card.matched {
    background: var(--success-bg);
    border: 2px solid var(--success);
    color: var(--success-text);
}

.intro-memory-stats {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--gray-500);
    padding: 0.75rem 0;
}

/* --- Legal Pages (Terms / Privacy / Philosophy) --- */
.legal-page-body {
    min-height: 100vh;
    margin: 0;
    color: var(--gray-800);
    font-family: 'Inter', 'Plus Jakarta Sans', system-ui, sans-serif;
    background:
        radial-gradient(65rem 35rem at 10% -10%, rgba(var(--primary-rgb), 0.22), transparent 62%),
        radial-gradient(55rem 30rem at 95% 0%, rgba(var(--info-rgb), 0.14), transparent 62%),
        var(--gray-50);
}

.legal-brand-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    background: rgba(20, 22, 38, 0.62);
    border-bottom: 1px solid var(--gray-200);
}

.legal-brand-inner {
    max-width: 980px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.legal-brand-logo {
    font-family: 'DynaPuff', cursive;
    font-size: 1.65rem;
    color: var(--primary-text);
    text-decoration: none;
    line-height: 1;
}

.legal-brand-nav {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.legal-brand-nav a {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    padding: 0.3rem 0.62rem;
    transition: var(--transition-fast);
}

.legal-brand-nav a.active,
.legal-brand-nav a:hover {
    color: var(--primary-text);
    border-color: var(--primary-border);
    background: rgba(var(--primary-rgb), 0.14);
}

.legal-page {
    max-width: 920px;
    margin: 1.2rem auto 3rem;
    padding: 2rem clamp(1rem, 2.2vw, 2.25rem) 2.3rem;
    border-radius: 1.1rem;
    border: 1px solid var(--gray-200);
    background:
        linear-gradient(160deg, rgba(var(--primary-rgb), 0.08) 0%, rgba(var(--primary-rgb), 0.01) 55%),
        var(--gray-100);
    box-shadow: var(--shadow-lg);
}

.legal-page h1 {
    font-family: 'DynaPuff', cursive;
    font-size: clamp(1.5rem, 2vw, 1.95rem);
    color: var(--gray-900);
    margin-bottom: 0.8rem;
}

.legal-page h2 {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 1.45rem 0 0.42rem;
}

.legal-page p,
.legal-page li {
    font-size: 0.93rem;
    line-height: 1.72;
    color: var(--gray-700);
}

.legal-page p {
    margin: 0 0 0.82rem;
}

.legal-page a {
    color: var(--primary-text);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
}

.legal-page a:hover {
    border-bottom-color: currentColor;
}

.legal-page-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.15rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.legal-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--gray-600);
    font-size: 0.8rem;
    text-decoration: none;
    margin-bottom: 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    padding: 0.28rem 0.62rem;
    transition: var(--transition-fast);
}

.legal-back:hover {
    color: var(--primary-text);
    border-color: var(--primary-border);
    background: rgba(var(--primary-rgb), 0.14);
}

/* ===== Stumbling Blocks Demo ===== */

.intro-stumbling-demo {
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.intro-stumbling-scene {
    position: relative;
    min-height: 420px;
    border: 1px solid var(--gray-200);
    border-radius: 1rem;
    background: var(--white);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* Badge view */
.intro-stumbling-hint-sim {
    position: absolute;
    bottom: 5.5rem;
    right: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--gray-500);
    animation: intro-stumbling-hint-fade 2s ease-in-out infinite alternate;
}

@keyframes intro-stumbling-hint-fade {
    from { opacity: 0.5; }
    to { opacity: 1; }
}

.intro-stumbling-badge-sim {
    position: absolute;
    bottom: 1.25rem;
    right: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: linear-gradient(135deg, var(--warning), var(--accent));
    color: var(--on-primary);
    border-radius: 2rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    animation: intro-stumbling-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.intro-stumbling-badge-sim:hover {
    transform: scale(1.08);
    box-shadow: var(--shadow-lg);
}

@keyframes intro-stumbling-pop {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.intro-stumbling-badge-count {
    background: var(--on-primary);
    color: var(--warning);
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 800;
}

/* Panel */
.intro-stumbling-panel-sim {
    position: absolute;
    inset: 0;
    background: var(--white);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    z-index: 2;
}

.intro-stumbling-panel-sim.open {
    transform: translateX(0);
}

.intro-stumbling-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
}

.intro-stumbling-panel-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-900);
}

.intro-stumbling-panel-title i {
    color: var(--warning);
}

.intro-stumbling-panel-count {
    background: var(--warning);
    color: var(--on-primary);
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 800;
}

.intro-stumbling-panel-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    font-size: 1.1rem;
    padding: 0.3rem;
    border-radius: 0.5rem;
    transition: var(--transition-fast);
}

.intro-stumbling-panel-close:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.intro-stumbling-panel-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

/* Word items */
.intro-stumbling-item-sim {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    transition: background 0.15s ease;
}

.intro-stumbling-item-sim:hover {
    background: var(--gray-50);
}

.intro-stumbling-item-main {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.intro-stumbling-item-word {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.intro-stumbling-item-word strong {
    font-size: 0.95rem;
    color: var(--gray-900);
}

.intro-stumbling-item-phonetic {
    font-size: 0.78rem;
    color: var(--gray-400);
    font-family: monospace;
}

.intro-stumbling-item-translation {
    font-size: 0.82rem;
    color: var(--gray-500);
}

.intro-stumbling-item-actions {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
}

.intro-stumbling-action-btn {
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    transition: var(--transition-fast);
}

.intro-stumbling-action-btn:hover {
    background: var(--gray-100);
    color: var(--primary);
    border-color: var(--primary);
}

.intro-stumbling-action-btn.accent {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
}

.intro-stumbling-action-btn.accent:hover {
    opacity: 0.85;
}

.intro-stumbling-action-btn.pulsing {
    animation: intro-stumbling-pulse 0.6s ease;
}

@keyframes intro-stumbling-pulse {
    0% { transform: scale(1); }
    30% { transform: scale(1.25); }
    100% { transform: scale(1); }
}

/* Exercise overlay */
.intro-stumbling-exercise-sim {
    position: absolute;
    inset: 0;
    background: var(--white);
    display: flex;
    flex-direction: column;
    z-index: 3;
}

.intro-stumbling-exercise-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
}

.intro-stumbling-exercise-step {
    background: var(--primary);
    color: var(--on-primary);
    padding: 0.15rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.72rem;
    font-weight: 700;
}

.intro-stumbling-exercise-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
    flex: 1;
}

.intro-stumbling-exercise-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    font-size: 1.1rem;
    padding: 0.3rem;
    border-radius: 0.5rem;
    transition: var(--transition-fast);
}

.intro-stumbling-exercise-close:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.intro-stumbling-exercise-sentence {
    padding: 2rem 1.5rem;
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--gray-800);
    text-align: center;
}

.intro-stumbling-blank {
    display: inline-block;
    min-width: 8rem;
    padding: 0.2rem 0.5rem;
    border-bottom: 2px dashed var(--primary);
    color: var(--primary);
    font-weight: 700;
    transition: all 0.3s ease;
}

.intro-stumbling-blank.correct {
    border-color: var(--success);
    color: var(--success);
}

.intro-stumbling-blank.reveal {
    border-color: var(--success);
    color: var(--success);
}

.intro-stumbling-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    margin-top: auto;
    padding-bottom: 2rem;
}

.intro-stumbling-option-sim {
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.75rem;
    background: var(--white);
    color: var(--gray-800);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
}

.intro-stumbling-option-sim:hover:not(:disabled) {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.intro-stumbling-option-sim.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}

.intro-stumbling-option-sim.wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-stumbling-option-sim:disabled {
    cursor: default;
    opacity: 0.7;
}

/* Speak step */
.intro-stumbling-speak-word {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    padding: 1.5rem 1rem 0.25rem;
}

.intro-stumbling-speak-phonetic {
    text-align: center;
    font-size: 1rem;
    color: var(--gray-400);
    font-family: monospace;
    margin-bottom: 1.5rem;
}

.intro-stumbling-speak-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding: 0 1.5rem;
}

.intro-stumbling-speak-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.75rem;
    background: var(--white);
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-stumbling-speak-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.intro-stumbling-speak-btn.pulsing {
    animation: intro-stumbling-pulse 0.6s ease;
}

.intro-stumbling-speak-btn.record {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
}

.intro-stumbling-speak-btn.record:hover {
    opacity: 0.85;
}

.intro-stumbling-speak-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.78rem;
    color: var(--gray-400);
    font-style: italic;
}

.intro-stumbling-done-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: auto auto 1.5rem;
    padding: 0.6rem 1.5rem;
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-stumbling-done-btn:hover {
    opacity: 0.85;
}

/* Responsive */
@media (max-width: 768px) {
    .intro-stumbling-scene {
        min-height: 380px;
    }

    .intro-stumbling-speak-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .intro-stumbling-options-grid {
        grid-template-columns: 1fr;
    }

    .intro-stumbling-exercise-sentence {
        font-size: 1rem;
        padding: 1.5rem 1rem;
    }

    .intro-stumbling-speak-word {
        font-size: 1.5rem;
    }
}

/* ===== Daily Report Demo ===== */

.intro-daily-report-demo {
    max-width: 680px;
    margin: 0 auto 2rem;
}

.intro-daily-scene {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg, 1rem);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* --- Hero Card --- */

.intro-daily-hero {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    animation: intro-daily-fadeIn 0.5s ease-out;
}

@keyframes intro-daily-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.intro-daily-avatar {
    flex-shrink: 0;
}

.intro-daily-avatar img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full, 50%);
    background: var(--gray-100);
}

.intro-daily-content {
    flex: 1;
    min-width: 0;
}

.intro-daily-greeting {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0 0 0.25rem;
}

.intro-daily-motivation {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin: 0 0 0.75rem;
}

.intro-daily-stats {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.intro-daily-stats i {
    color: var(--primary);
    font-size: 0.85rem;
}

.intro-daily-count {
    font-weight: 700;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

/* --- Word Pills --- */

.intro-daily-words {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.intro-daily-words-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
}

.intro-daily-words-label {
    font-size: 0.8rem;
    color: var(--gray-500);
    font-weight: 600;
    margin-right: 0.25rem;
}

.intro-daily-pill {
    display: inline-flex;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full, 1rem);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: default;
    opacity: 0;
    animation: intro-daily-popIn 0.3s ease-out forwards;
}

@keyframes intro-daily-popIn {
    from { opacity: 0; transform: scale(0.7); }
    to { opacity: 1; transform: scale(1); }
}

.intro-daily-pill.trouble {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.intro-daily-pill.new {
    background: var(--info-bg);
    color: var(--info-text);
}

/* --- Action Buttons --- */

.intro-daily-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.intro-daily-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border: 1.5px solid var(--primary);
    border-radius: var(--radius-full, 1rem);
    background: transparent;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.intro-daily-action-btn:hover {
    background: var(--primary);
    color: var(--on-primary);
}

.intro-daily-action-btn.pulsing {
    animation: intro-daily-pulse 0.4s ease;
}

@keyframes intro-daily-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.06); }
    100% { transform: scale(1); }
}

/* --- Weekly Tasks --- */

.intro-daily-weekly {
    border-top: 1px solid var(--gray-200);
}

.intro-daily-weekly-header {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    gap: 0.75rem;
    color: var(--gray-800);
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.intro-daily-weekly-header:hover {
    background: var(--gray-50);
}

.intro-daily-weekly-title-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.intro-daily-weekly-trophy {
    font-size: 1.1rem;
}

.intro-daily-weekly-progress {
    font-size: 0.8rem;
    color: var(--gray-500);
    font-weight: 500;
}

.intro-daily-counters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
    justify-content: flex-end;
}

.intro-daily-counter {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.5rem;
    background: var(--gray-100);
    border-radius: var(--radius-full, 1rem);
    font-size: 0.75rem;
    color: var(--gray-600);
    font-weight: 500;
}

.intro-daily-chevron {
    font-size: 0.75rem;
    color: var(--gray-400);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.intro-daily-weekly.expanded .intro-daily-chevron {
    transform: rotate(180deg);
}

/* Collapsible body */
.intro-daily-weekly-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 1.5rem;
}

.intro-daily-weekly.expanded .intro-daily-weekly-body {
    max-height: 500px;
    padding-bottom: 1rem;
}

/* --- Challenge Cards --- */

.intro-daily-challenge {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem 0;
    align-items: flex-start;
}

.intro-daily-challenge + .intro-daily-challenge {
    border-top: 1px solid var(--gray-100);
}

.intro-daily-challenge-icon {
    width: 36px;
    height: 36px;
    border-radius: 0.5rem;
    background: var(--primary);
    color: var(--on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.intro-daily-challenge-info {
    flex: 1;
    min-width: 0;
}

.intro-daily-challenge-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.15rem;
}

.intro-daily-challenge-desc {
    font-size: 0.78rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}

.intro-daily-challenge-bar {
    height: 6px;
    background: var(--gray-100);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.25rem;
}

.intro-daily-challenge-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.8s ease;
}

.intro-daily-challenge-count {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

/* --- Note --- */

.intro-daily-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.78rem;
    color: var(--gray-400);
    font-style: italic;
    border-top: 1px solid var(--gray-100);
}

.intro-daily-note i {
    font-size: 0.7rem;
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .intro-daily-hero {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .intro-daily-words-group {
        justify-content: center;
    }

    .intro-daily-actions {
        justify-content: center;
    }

    .intro-daily-weekly-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .intro-daily-counters {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .intro-daily-actions {
        flex-direction: column;
    }

    .intro-daily-action-btn {
        justify-content: center;
    }
}