/* ================= Learn Layer (learn.js) ================= */

.learn {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.learn-kicker {
    margin: 0 0 1rem;
    padding-left: 0.75rem;
    border-left: 3px solid var(--accent-orange);
    color: var(--text-main);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.learn-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.learn-tab {
    min-height: 44px;
    padding: 10px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-color);
    color: var(--text-muted);
    font: 600 0.95rem/1.2 Manrope, sans-serif;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.learn-tab:hover {
    color: var(--text-main);
    border-color: var(--accent-orange);
}

.learn-tab[aria-selected="true"] {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
    color: var(--ink);
}

.learn-panel {
    animation: learnFade 0.35s ease;
}

.learn-panel[hidden] {
    display: none;
}

@keyframes learnFade {
    from { opacity: 0; transform: translateY(8px); }
}

/* --- The maths --- */
.learn-maths h3 {
    margin: 1.5rem 0 0.5rem;
    color: var(--text-main);
    font-size: 1.2rem;
}

.learn-maths h3:first-child {
    margin-top: 0;
}

.learn-maths p,
.learn-maths li {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.75;
}

.learn-maths .formula {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--accent-gold);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-main);
    font: 500 1.05rem/1.6 "SFMono-Regular", Menlo, Consolas, monospace;
    overflow-x: auto;
}

.learn-think {
    margin-top: 1rem;
    padding: 1rem 1.25rem;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-color);
}

.learn-think summary {
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
}

.learn-think p {
    margin: 0.75rem 0 0;
    color: var(--text-muted);
    line-height: 1.7;
}

/* --- Quick check --- */
.quiz-progress {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 1rem;
}

.quiz-progress span {
    width: 28px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
}

.quiz-progress span.is-done {
    background: var(--accent-gold);
}

.quiz-progress span.is-current {
    background: var(--accent-orange);
}

.quiz-progress small {
    margin-left: 8px;
    color: var(--text-muted);
}

.quiz-question {
    margin: 0 0 1rem;
    color: var(--text-main);
    font-size: 1.25rem;
    line-height: 1.4;
}

.quiz-options {
    display: grid;
    gap: 10px;
}

.quiz-option {
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-color);
    color: var(--text-main);
    font: 500 1rem/1.4 Manrope, sans-serif;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.quiz-option:hover:not(:disabled) {
    border-color: var(--accent-orange);
    transform: translateX(4px);
}

.quiz-option:disabled {
    cursor: default;
}

.quiz-option.is-correct {
    border-color: #22a06b;
    background: rgba(34, 160, 107, 0.14);
}

.quiz-option.is-wrong {
    border-color: #e5484d;
    background: rgba(229, 72, 77, 0.12);
    animation: quizShake 0.35s ease;
}

@keyframes quizShake {
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.quiz-feedback:not(:empty) {
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    background: var(--bg-color);
}

.quiz-feedback strong {
    color: var(--text-main);
}

.game-details-body .quiz-feedback p,
.quiz-feedback p {
    margin: 0.5rem 0 1rem;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
}

.quiz-next {
    border: none;
    cursor: pointer;
}

.quiz-score {
    color: var(--text-main);
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.quiz-message {
    margin: 0.25rem 0 1.25rem;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.learn-quiz .btn-primary {
    border: none;
    cursor: pointer;
}

/* --- Watch next --- */
.learn-videos {
    display: grid;
    gap: 12px;
}

.learn-video,
.learn-try-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-color);
    color: var(--text-main);
    text-decoration: none;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.learn-video:hover,
.learn-try-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-2px);
}

.learn-video img {
    flex: none;
    width: 160px;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    object-fit: cover;
}

.learn-video-text,
.learn-try-card span {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.learn-video-text small,
.learn-try-card small {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* --- Progress badge on game cards --- */
.learn-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 10px;
    border-radius: 20px;
    background: rgba(15, 23, 42, 0.85);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
}

.learn-badge.is-perfect {
    background: #b7791f;
}

/* --- Video page: try it hands-on --- */
.learn-try {
    margin-bottom: 4rem;
}

.learn-try h2 {
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.learn-try-sub {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.learn-try-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.learn-try-card img {
    flex: none;
    width: 72px;
    height: 72px;
    border-radius: 8px;
    background: #fff;
    object-fit: contain;
}

@media (max-width: 600px) {
    .learn-video {
        flex-direction: column;
        align-items: stretch;
    }

    .learn-video img {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .learn-panel,
    .quiz-option,
    .quiz-option.is-wrong {
        animation: none;
        transition: none;
    }
}