/* ===== Learn Screen — Guided Lesson Flow ===== */

.learn-container {
    max-width: 640px;
    margin: 0 auto;
    padding: 1rem;
}

/* Progress bar at top */
.learn-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.learn-progress__bar {
    flex: 1;
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.learn-progress__fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.learn-progress__text {
    font-size: 0.8125rem;
    color: var(--gray-500);
    font-weight: 500;
    white-space: nowrap;
}

.learn-progress__close {
    font-size: 1.25rem;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0.25rem;
}

.learn-progress__close:hover {
    color: var(--gray-700);
}

/* ===== INTRO Step ===== */
.learn-intro {
    text-align: center;
    padding: 3rem 1rem;
}

.learn-intro__icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

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

.learn-intro__text {
    font-size: 1.0625rem;
    color: var(--gray-600);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.learn-intro__goal {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: 2rem;
}

/* ===== TEACH Step ===== */
.learn-teach {
    text-align: center;
    padding: 1rem 0;
}

.learn-teach__hanzi {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 6rem;
    font-weight: 500;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.learn-teach__pinyin {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.learn-teach__german {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.learn-teach__writer {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

.learn-teach__writer svg {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.learn-teach__meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.learn-teach__meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.learn-teach__tip {
    background: var(--info-bg);
    color: var(--info-text);
    border: 1px solid var(--info);
    border-radius: var(--radius-lg);
    padding: 0.875rem 1rem;
    margin: 1rem auto;
    max-width: 440px;
    font-size: 0.9375rem;
    line-height: 1.5;
    text-align: left;
}

.learn-teach__tip i {
    margin-right: 0.5rem;
    color: var(--info);
}

.learn-teach__actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* ===== MINI-QUIZ Step ===== */
.learn-quiz {
    text-align: center;
    padding: 1rem 0;
}

.learn-quiz__title {
    font-size: 1rem;
    color: var(--gray-500);
    margin-bottom: 1.5rem;
}

.learn-quiz__prompt {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 5rem;
    font-weight: 500;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 2rem;
}

.learn-quiz__options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.learn-quiz__feedback {
    min-height: 2rem;
    font-size: 1.0625rem;
    margin-bottom: 1rem;
}

/* ===== SUMMARY Step ===== */
.learn-summary {
    text-align: center;
    padding: 2rem 0;
}

.learn-summary__emoji {
    font-size: 4rem;
    margin-bottom: 0.75rem;
}

.learn-summary__score {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.learn-summary__label {
    font-size: 1.0625rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.learn-summary__chars {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.learn-summary__char {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 1.75rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    background: var(--white);
}

.learn-summary__char--correct {
    border-color: var(--success);
    background: var(--success-bg);
}

.learn-summary__char--wrong {
    border-color: var(--danger);
    background: var(--danger-bg);
}

.learn-summary__actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ===== Next Button (shared) ===== */
.learn-next {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.learn-next .btn {
    min-width: 200px;
    font-size: 1.0625rem;
    padding: 0.875rem 1.5rem;
}

/* ===== Hero Banner (Home screen) ===== */
.hero-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    margin-bottom: 1.25rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: var(--transition);
}

.hero-banner:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.hero-banner__text {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-700);
}

.hero-banner__action {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    white-space: nowrap;
}

.hero-banner__action i {
    font-size: 0.75rem;
    transition: transform 0.2s;
}

.hero-banner:hover .hero-banner__action i {
    transform: translateX(3px);
}

.hero-banner--complete {
    border-color: var(--success);
    background: var(--success-bg);
}

.hero-banner--complete .hero-banner__action {
    color: var(--success);
}

.hero-banner--complete:hover {
    border-color: var(--success);
}

/* ===== Lesson Card Lock States ===== */
.lesson-card--locked {
    opacity: 0.5;
    pointer-events: none;
    position: relative;
}

.lesson-card--locked .lesson-card__lock {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    color: var(--gray-400);
    font-size: 0.875rem;
}

.lesson-card--completed {
    border-color: var(--success);
    border-width: 2px;
}

.lesson-card--completed .lesson-card__check {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    color: var(--success);
    font-size: 0.875rem;
}

.lesson-card--current {
    border-color: var(--primary);
    border-width: 2px;
    box-shadow: var(--shadow-md);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .learn-teach__hanzi {
        font-size: 5rem;
    }

    .learn-quiz__prompt {
        font-size: 4rem;
    }

    .learn-quiz__options {
        grid-template-columns: 1fr;
    }

    .hero-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .learn-teach__hanzi {
        font-size: 4rem;
    }

    .learn-quiz__prompt {
        font-size: 3.5rem;
    }
}