/**
 * ghk-cu mastery course styles
 *
 * extends the base learn page styles with course-specific theming,
 * paywall ui, loading states, and interactive visualization containers.
 */

/* ============================================================
   course header badge
   ============================================================ */

.ghk-course-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: linear-gradient(135deg, rgba(180, 83, 9, 0.15), rgba(217, 119, 6, 0.1));
    color: var(--color-amber, #f59e0b);
    border: 1px solid rgba(217, 119, 6, 0.2);
}

.ghk-course-badge i {
    width: 14px;
    height: 14px;
}

/* ============================================================
   unit navigation strip
   ============================================================ */

.ghk-unit-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 24px 0;
    padding: 12px 16px;
    border-radius: 12px;
    background: var(--color-bg-card, rgba(255, 255, 255, 0.05));
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
}

.ghk-unit-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--color-primary, #34d399);
    text-decoration: none;
    transition: opacity 0.2s;
}

.ghk-unit-nav a:hover {
    opacity: 0.8;
}

.ghk-unit-nav a i {
    width: 16px;
    height: 16px;
}

.ghk-unit-nav .ghk-unit-counter {
    font-size: 0.8rem;
    color: var(--color-muted, rgba(255, 255, 255, 0.5));
}

/* ============================================================
   loading skeleton for paid content
   ============================================================ */

.ghk-loading {
    position: relative;
    min-height: 120px;
}

.ghk-loading::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    background: linear-gradient(
        90deg,
        var(--color-bg-card, rgba(255, 255, 255, 0.03)) 25%,
        rgba(255, 255, 255, 0.06) 50%,
        var(--color-bg-card, rgba(255, 255, 255, 0.03)) 75%
    );
    background-size: 200% 100%;
    animation: ghk-shimmer 1.5s ease-in-out infinite;
}

@keyframes ghk-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* light mode loading skeleton */
[data-theme="light"] .ghk-loading::after {
    background: linear-gradient(
        90deg,
        rgba(0, 0, 0, 0.04) 25%,
        rgba(0, 0, 0, 0.08) 50%,
        rgba(0, 0, 0, 0.04) 75%
    );
    background-size: 200% 100%;
}

/* ============================================================
   section content (from supabase)
   ============================================================ */

.ghk-section-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text, #fff);
    text-transform: lowercase;
}

.ghk-section-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary, rgba(255, 255, 255, 0.8));
}

.ghk-section-body p {
    margin-bottom: 12px;
}

.ghk-section-body strong {
    color: var(--color-text, #fff);
    font-weight: 600;
}

.ghk-section-body ul,
.ghk-section-body ol {
    margin: 8px 0 12px 20px;
}

.ghk-section-body li {
    margin-bottom: 4px;
}

/* ============================================================
   paywall cta
   ============================================================ */

.ghk-paywall {
    text-align: center;
    padding: 48px 24px;
    border-radius: 16px;
    background: var(--color-bg-card, rgba(255, 255, 255, 0.03));
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
    margin: 32px 0;
}

.ghk-paywall-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(217, 119, 6, 0.1);
    margin-bottom: 16px;
}

.ghk-paywall-icon i {
    width: 28px;
    height: 28px;
    color: var(--color-amber, #f59e0b);
}

.ghk-paywall-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text, #fff);
}

.ghk-paywall--cert {
    border-color: rgba(52, 211, 153, 0.3);
    background: rgba(52, 211, 153, 0.04);
}

.ghk-paywall-title--success {
    color: var(--color-primary, #34d399);
}

.ghk-paywall-desc {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-muted, rgba(255, 255, 255, 0.5));
    max-width: 480px;
    margin: 0 auto 24px;
}

.ghk-paywall-consent {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    text-align: left;
    max-width: 440px;
    margin: 0 auto 24px;
    font-size: 0.82rem;
    color: var(--color-muted, rgba(255, 255, 255, 0.5));
    cursor: pointer;
}

.ghk-paywall-consent input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--color-primary, #34d399);
}

.ghk-paywall-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 360px;
    margin: 0 auto 16px;
}

.ghk-buy-btn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.ghk-buy-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ghk-paywall-guarantee {
    font-size: 0.78rem;
    color: var(--color-muted, rgba(255, 255, 255, 0.4));
}

.ghk-cert-form {
    display: flex;
    gap: 10px;
    max-width: 400px;
    margin: 0 auto;
}

.ghk-cert-input {
    flex: 1;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
    background: var(--color-bg-card, rgba(255, 255, 255, 0.03));
    color: var(--color-text, #fff);
    font-size: 0.9rem;
}

/* ============================================================
   interactive visualization containers
   ============================================================ */

.ghk-interactive-wrap {
    margin: 24px 0;
    border-radius: 16px;
    overflow: hidden;
    background: var(--color-bg-card, rgba(255, 255, 255, 0.03));
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
}

.ghk-interactive-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary, #34d399);
    border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.06));
}

.ghk-interactive-header i {
    width: 16px;
    height: 16px;
}

.ghk-interactive-body {
    padding: 20px;
    min-height: 300px;
}

/* ============================================================
   data highlight cards (used in multiple units)
   ============================================================ */

.ghk-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin: 16px 0;
}

.ghk-stat-card {
    padding: 16px;
    border-radius: 12px;
    background: var(--color-bg-card, rgba(255, 255, 255, 0.03));
    border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
    text-align: center;
}

.ghk-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary, #34d399);
    margin-bottom: 4px;
}

.ghk-stat-label {
    font-size: 0.78rem;
    color: var(--color-muted, rgba(255, 255, 255, 0.5));
}

/* ============================================================
   citation reference style
   ============================================================ */

.ghk-citation {
    font-size: 0.82rem;
    color: var(--color-muted, rgba(255, 255, 255, 0.45));
    font-style: italic;
}

.ghk-citation a {
    color: var(--color-primary, #34d399);
    text-decoration: none;
}

.ghk-citation a:hover {
    text-decoration: underline;
}

/* ============================================================
   evidence tier badges
   ============================================================ */

.ghk-evidence-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.ghk-evidence-badge--rct {
    background: rgba(52, 211, 153, 0.12);
    color: #34d399;
    border: 1px solid rgba(52, 211, 153, 0.2);
}

.ghk-evidence-badge--animal {
    background: rgba(251, 191, 36, 0.12);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.2);
}

.ghk-evidence-badge--invitro {
    background: rgba(96, 165, 250, 0.12);
    color: #60a5fa;
    border: 1px solid rgba(96, 165, 250, 0.2);
}

.ghk-evidence-badge--gene {
    background: rgba(167, 139, 250, 0.12);
    color: #a78bfa;
    border: 1px solid rgba(167, 139, 250, 0.2);
}

/* ============================================================
   responsive
   ============================================================ */

@media (max-width: 640px) {
    .ghk-paywall {
        padding: 32px 16px;
    }

    .ghk-paywall-title {
        font-size: 1.1rem;
    }

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

    .ghk-unit-nav {
        flex-direction: column;
        text-align: center;
    }

    .ghk-interactive-body {
        padding: 12px;
        min-height: 240px;
    }
}

/* ============================================================
   prefers-reduced-motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    .ghk-loading::after {
        animation: none;
    }
}