/* ── Course overview page ── */
/* All values use globals from base/variables.css — zero hardcoded colors */

/* Scroll progress bar */
#crs-sp {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
    transform-origin: left;
    transform: scaleX(0);
    z-index: 9999;
    transition: transform 0.08s linear;
    pointer-events: none;
}

.crs-page {
    min-height: 100vh;
    background: var(--primary-color);
    color: var(--text-light);
    padding-bottom: 80px;
}

/* ═══════════════════════════════
   HERO — full-width wallpaper
   Mirrors ph-hero--invata exactly
═══════════════════════════════ */
.crs-hero {
    position: relative;
    isolation: isolate;
    width: 100%;
    background-image: url('../../assets/images/wallpapers/invata.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-color: var(--dark-bg-2);
    padding: 104px 0 64px;
    overflow: hidden;
}

.crs-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background: rgba(0, 0, 0, 0.68);
    pointer-events: none;
}

[data-theme="light"] .crs-hero::before {
    background: rgba(var(--primary-rgb), 0.85);
}

.crs-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Breadcrumb */
.crs-hero__breadcrumb {
    margin-bottom: 32px;
}

.crs-hero__breadcrumb a {
    color: rgba(255, 255, 255, 0.62);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: color var(--transition-fast);
}

.crs-hero__breadcrumb a:hover { color: rgba(255, 255, 255, 0.95); }

/* Body: badge → icon → title → description */
.crs-hero__body { margin-bottom: 0; }

.crs-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    border-radius: 99px;
    border: 1px solid rgba(var(--accent-rgb), 0.4);
    color: var(--accent-color);
    background: rgba(var(--accent-rgb), 0.08);
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    margin-bottom: 18px;
    backdrop-filter: blur(4px);
}

.crs-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 16px;
    display: block;
    filter: drop-shadow(0 2px 14px rgba(0, 0, 0, 0.55));
}

.crs-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.9rem, 4vw, 2.8rem);
    font-weight: 700;
    color: rgba(255, 255, 255, 0.97);
    margin: 0 0 16px;
    line-height: 1.14;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.55);
    max-width: 680px;
}

.crs-description {
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.97rem;
    line-height: 1.68;
    margin: 0;
    max-width: 600px;
}

/* ── Stats row — injected by course.js ── */
.crs-hero-stats {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
    margin: 26px 0 0;
    font-size: 0.73rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.46);
}

.crs-hero-stat strong {
    color: rgba(255, 255, 255, 0.88);
    font-weight: 700;
    margin-right: 4px;
}

.crs-hero-stat-sep {
    margin: 0 11px;
    opacity: 0.28;
}

/* ── Action buttons — injected by course.js ── */
.crs-hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.crs-hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.79rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: opacity var(--transition-fast), transform 0.1s;
}

.crs-hero-btn--primary {
    background: var(--accent-color);
    color: var(--primary-color);
}

.crs-hero-btn--primary:hover { opacity: 0.86; transform: translateY(-1px); }

.crs-hero-btn--outline {
    background: rgba(255, 255, 255, 0.07);
    color: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(6px);
}

.crs-hero-btn--outline:hover {
    background: rgba(255, 255, 255, 0.13);
    color: rgba(255, 255, 255, 0.97);
}

/* Hide legacy progress wrap — replaced by hero-actions */
.crs-progress-wrap { display: none !important; }

/* ── Hero two-column grid ── */
.crs-hero__grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    align-items: center;
}

.crs-hero__left { min-width: 0; }

/* Hero progress card (right column) */
.crs-hero-progress-card {
    background: rgba(0, 0, 0, 0.32);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 22px 20px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.crs-hero-progress-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.crs-hero-progress-card__label {
    font-size: 0.74rem;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}

.crs-hero-progress-card__pct {
    font-size: 0.83rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: 'SFMono-Regular', 'Courier New', monospace;
}

.crs-hero-progress-card__track {
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 18px;
}

.crs-hero-progress-card__fill {
    height: 100%;
    background: var(--accent-color);
    border-radius: 3px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.88;
}

.crs-hero-progress-steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.crs-hero-progress-step {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.71rem;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.35;
    min-width: 0;
}

.crs-hero-progress-step span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.crs-hero-step-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.58rem;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.35);
}

.crs-hero-step-dot--done {
    background: rgba(var(--accent-rgb), 0.18);
    border-color: rgba(var(--accent-rgb), 0.45);
    color: var(--accent-color);
}

.crs-hero-step-dot--active {
    background: rgba(var(--accent-rgb), 0.1);
    border-color: rgba(var(--accent-rgb), 0.3);
    color: var(--accent-color);
}

/* Fix: crs-hero-actions alias (JS injects this class) */
.crs-hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 26px;
}

/* ═══════════════════════════════
   TWO-COLUMN LAYOUT
   .crs-main and .crs-sidebar are
   injected by course.js
═══════════════════════════════ */
.crs-container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 40px 60px;
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.crs-main {
    flex: 1;
    min-width: 0;
}

.crs-sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    scrollbar-width: none;
}

.crs-sidebar::-webkit-scrollbar { display: none; }

/* ── Tabs ── */
.crs-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin: 28px 0 0;
    width: 100%;
}

.crs-tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    padding: 11px 22px;
    color: var(--text-gray);
    font-family: inherit;
    font-size: 0.87rem;
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.crs-tab-btn:hover { color: var(--text-light); }

.crs-tab-btn.active {
    color: var(--text-light);
    border-bottom-color: var(--accent-color);
    font-weight: 600;
}

.crs-tab-panel { display: none; padding: 20px 0; }
.crs-tab-panel.active { display: block; }

/* ── Module list ── */
.crs-module-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.crs-module {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    overflow: hidden;
    transition: border-color var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.crs-module.open,
.crs-module:hover { border-color: rgba(var(--accent-rgb), 0.22); }

.crs-module-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}

.crs-module-header:hover { background: rgba(var(--accent-rgb), 0.04); }

.crs-module-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(var(--accent-rgb), 0.08);
    border: 1px solid rgba(var(--accent-rgb), 0.16);
    color: var(--accent-color);
    font-size: 0.69rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.crs-module-title {
    flex: 1;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-light);
    min-width: 0;
}

.crs-module-time {
    font-size: 0.71rem;
    color: var(--text-gray);
    opacity: 0.5;
    white-space: nowrap;
    flex-shrink: 0;
}

.crs-module-count {
    font-size: 0.71rem;
    color: var(--text-gray);
    background: rgba(var(--accent-rgb), 0.06);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2px 10px;
    white-space: nowrap;
    flex-shrink: 0;
}

/* FREE / PRO badges — injected by course.js */
.crs-module-badge {
    font-size: 0.61rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    padding: 2px 9px;
    border-radius: 10px;
    flex-shrink: 0;
    white-space: nowrap;
}

.crs-module-badge--free {
    color: var(--accent-color);
    border: 1px solid rgba(var(--accent-rgb), 0.35);
    background: rgba(var(--accent-rgb), 0.07);
}

.crs-module-badge--pro {
    color: var(--text-gray);
    border: 1px solid var(--border-color);
    background: rgba(var(--accent-rgb), 0.03);
    opacity: 0.6;
}

.crs-module-chevron {
    width: 15px;
    height: 15px;
    color: var(--text-gray);
    transition: transform 0.22s ease;
    flex-shrink: 0;
    opacity: 0.5;
}

.crs-module.open .crs-module-chevron { transform: rotate(180deg); }

.crs-module-lessons { display: none; border-top: 1px solid var(--border-color); }
.crs-module.open .crs-module-lessons { display: block; }

/* ── Lesson rows ── */
.crs-lesson-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 18px 11px 20px;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-light);
    transition: background var(--transition-fast);
}

.crs-lesson-row:last-child { border-bottom: none; }

.crs-lesson-row:hover:not(.crs-lesson-row--locked) {
    background: rgba(var(--accent-rgb), 0.04);
}

.crs-lesson-row--locked {
    cursor: default;
    opacity: 0.27;
    pointer-events: none;
}

.crs-lesson-row--next { background: rgba(var(--accent-rgb), 0.04); }

.crs-lesson-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.crs-lesson-icon--done {
    color: var(--success);
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.22);
}

.crs-lesson-icon--open  { color: var(--text-gray); opacity: 0.38; }
.crs-lesson-icon--locked { color: var(--text-gray); opacity: 0.3; }

.crs-lesson-icon--next {
    color: var(--accent-color);
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.22);
}

.crs-lesson-title {
    flex: 1;
    font-size: 0.875rem;
    line-height: 1.4;
    color: var(--text-light);
    opacity: 0.8;
    min-width: 0;
}

.crs-lesson-row--next .crs-lesson-title {
    opacity: 1;
    font-weight: 600;
}

.crs-lesson-row:hover:not(.crs-lesson-row--locked) .crs-lesson-title {
    opacity: 1;
}

.crs-lesson-time {
    font-size: 0.71rem;
    color: var(--text-gray);
    opacity: 0.45;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Coming soon panel */
.crs-coming-soon {
    text-align: center;
    padding: 64px 20px;
    color: var(--text-gray);
}

.crs-coming-soon-icon { font-size: 2.5rem; margin-bottom: 14px; }

.crs-coming-soon h3 {
    font-size: 1.05rem;
    color: var(--text-light);
    margin: 0 0 8px;
    font-weight: 600;
}

.crs-coming-soon p {
    font-size: 0.88rem;
    line-height: 1.55;
    max-width: 360px;
    margin: 0 auto;
}

/* Skeleton */
.crs-skeleton-line {
    background: linear-gradient(90deg, var(--card-bg) 25%, var(--secondary-color) 50%, var(--card-bg) 75%);
    background-size: 200% 100%;
    animation: crs-shimmer 1.5s infinite;
    border-radius: 6px;
    height: 1em;
}

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

/* ═══════════════════════════════
   SIDEBAR CARDS
═══════════════════════════════ */
.crs-sb-label {
    display: block;
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    color: var(--text-gray);
    opacity: 0.55;
    padding: 14px 16px 0;
}

/* Progress card */
.crs-sb-progress {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px 16px;
    box-shadow: var(--shadow-sm);
}

.crs-sb-progress__pct {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-light);
    line-height: 1;
    display: block;
    margin: 10px 0 5px;
}

.crs-sb-progress__meta {
    font-size: 0.74rem;
    color: var(--text-gray);
    letter-spacing: 0.04em;
    margin-bottom: 14px;
    text-transform: uppercase;
    opacity: 0.7;
}

.crs-sb-progress__track {
    height: 4px;
    background: rgba(var(--accent-rgb), 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.crs-sb-progress__fill {
    height: 100%;
    background: var(--accent-color);
    border-radius: 4px;
    transition: width 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    opacity: 0.88;
}

.crs-sb-progress__btn {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 16px;
    background: var(--accent-color);
    color: var(--primary-color);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    font-family: inherit;
    transition: opacity var(--transition-fast);
    box-sizing: border-box;
}

.crs-sb-progress__btn:hover { opacity: 0.84; }

/* Instructor card */
.crs-sb-instructor {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    padding-bottom: 16px;
}

.crs-sb-instructor__body {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px 0;
}

.crs-sb-instructor__avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.2);
    color: var(--accent-color);
    font-size: 0.77rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-family: 'SFMono-Regular', 'Courier New', monospace;
    letter-spacing: 0.02em;
}

.crs-sb-instructor__info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.crs-sb-instructor__name {
    font-size: 0.87rem;
    font-weight: 600;
    color: var(--text-light);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.crs-sb-instructor__role {
    font-size: 0.69rem;
    color: var(--accent-color);
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.82;
}

.crs-sb-instructor__bio {
    font-size: 0.79rem;
    color: var(--text-gray);
    line-height: 1.5;
    padding: 10px 16px 0;
    opacity: 0.7;
}

/* What You'll Learn card */
.crs-sb-learn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    padding-bottom: 14px;
}

.crs-sb-learn__list {
    list-style: none;
    padding: 6px 16px 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.crs-sb-learn__item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.81rem;
    color: var(--text-gray);
    line-height: 1.45;
}

.crs-sb-learn__check {
    color: var(--success);
    flex-shrink: 0;
    margin-top: 1px;
    font-size: 0.8rem;
    font-weight: 700;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .crs-hero { padding: 84px 0 56px; }
    .crs-hero__inner,
    .crs-container { padding-left: 32px; padding-right: 32px; }
    .crs-sidebar { width: 240px; }
    .crs-hero__grid { grid-template-columns: 1fr 260px; gap: 32px; }
}

@media (max-width: 860px) {
    .crs-container {
        flex-direction: column;
        padding-left: 24px;
        padding-right: 24px;
        gap: 24px;
    }
    .crs-sidebar {
        width: 100%;
        position: static;
        max-height: none;
        overflow-y: visible;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .crs-sb-progress,
    .crs-sb-learn { flex: 1; min-width: 200px; }
    .crs-sb-instructor { width: 100%; }
    .crs-hero__grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .crs-hero__right { display: none; }
}

@media (max-width: 600px) {
    .crs-page { padding-bottom: 90px; }
    .crs-hero { padding: 72px 0 44px; background-attachment: scroll; }
    .crs-hero__inner { padding: 0 18px; }
    .crs-container { padding: 0 16px 28px; }
    .crs-title { font-size: 1.75rem; }
    .crs-tab-btn { padding: 10px 14px; font-size: 0.82rem; }
    .crs-sidebar { flex-direction: column; }
    .crs-hero-actions { flex-direction: column; align-items: stretch; }
    .crs-hero-btn { justify-content: center; }
}