/* ================================================================
   COURSES — Unified visual system for all course views
   Reusable .crs-* components shared across:
     - catalog, course_detail, classroom, module_detail, lesson
   ================================================================ */

/* ── COURSE-SPECIFIC TOKENS ─────────────────────────────────── */
:root {
    --course-warm-bg: color-mix(in srgb, var(--color-brand) 4%, var(--bg-surface));
    --course-warm-border: color-mix(in srgb, var(--color-brand) 12%, var(--border-subtle));
    --course-cover-bg: #0E0F12;
    --course-cover-radius: var(--radius-xl);
    --course-accent-text: #993C1D;
    --course-accent-bg: #FAECE7;
    --course-accent-violet: #534AB7;
    --course-accent-violet-bg: rgba(83, 74, 183, 0.1);
}
[data-theme="light"] {
    --course-warm-bg: color-mix(in srgb, var(--color-brand) 3%, var(--bg-surface));
    --course-cover-bg: #E8E8EC;
    --course-accent-text: #993C1D;
    --course-accent-bg: #FAECE7;
}

/* ── COVER ───────────────────────────────────────────────────── */
.crs-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    background: var(--course-cover-bg);
    border-radius: var(--course-cover-radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.crs-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.6) 100%);
    z-index: 1;
}
.crs-cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.crs-cover--active::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 80%, rgba(255,107,0,0.15) 0%, transparent 60%);
    z-index: 2;
}

.crs-cover--module {
    aspect-ratio: 16 / 10;
    background:
        radial-gradient(ellipse at 30% 70%, rgba(255,107,0,0.06) 0%, transparent 50%),
        var(--course-cover-bg);
}
.crs-cover--module-num {
    position: relative;
    z-index: 3;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 500;
    color: rgba(255,255,255,0.15);
    letter-spacing: -0.01em;
}
@media (max-width: 767px) {
    .crs-cover--module-num { font-size: 18px; }
}

.crs-cover--module-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background:
        radial-gradient(ellipse at 50% 80%, rgba(255,107,0,0.08) 0%, transparent 60%),
        var(--course-cover-bg);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    flex-shrink: 0;
}

/* ── PILLS ───────────────────────────────────────────────────── */
.crs-pill-pricing {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    position: relative;
    z-index: 5;
}
.crs-pill-pricing--free {
    background: rgba(34,197,94,0.12);
    color: var(--success);
    border: 1px solid rgba(34,197,94,0.2);
}
.crs-pill-pricing--paid {
    background: var(--course-accent-bg);
    color: var(--course-accent-text);
    border: 1px solid rgba(153,60,29,0.2);
}
.crs-pill-pricing--community {
    background: var(--course-accent-violet-bg);
    color: var(--course-accent-violet);
    border: 1px solid rgba(83,74,183,0.2);
}

.crs-pill-status {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.crs-pill-status--completed {
    background: rgba(58,109,17,0.95);
    color: white;
}
.crs-pill-status--in-progress {
    background: rgba(196,65,6,0.95);
    color: white;
}
.crs-pill-status--pending {
    background: var(--bg-active);
    color: var(--text-tertiary);
}

/* ── STAT BLOCK ──────────────────────────────────────────────── */
.crs-stat-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.crs-stat-block-num {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.crs-stat-block-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ── EYEBROW ─────────────────────────────────────────────────── */
.crs-eyebrow {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--course-accent-text);
}

/* ── CARD ─────────────────────────────────────────────────────── */
.crs-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: var(--shadow-card-rest);
}
.crs-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

/* ── MENTOR CARD ─────────────────────────────────────────────── */
.crs-mentor-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card-rest);
    text-decoration: none;
    transition: all var(--dur-base) var(--ease-standard);
}
.crs-mentor-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--border-strong);
}
.crs-mentor-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,107,0,0.15), rgba(249,115,22,0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}
.crs-mentor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ── OUTCOME ITEM ────────────────────────────────────────────── */
.crs-outcome-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
}
.crs-outcome-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--course-accent-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}
.crs-outcome-icon svg {
    width: 12px;
    height: 12px;
    stroke: var(--course-accent-text);
    stroke-width: 2.5;
    fill: none;
}
.crs-outcome-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ── MODULE GRID ─────────────────────────────────────────────── */
.crs-module-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
@media (min-width: 768px) {
    .crs-module-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
}

/* ── MODULE CARD VERTICAL (Skool style — desktop) ────────────── */
.crs-module-card-vertical {
    display: none;
    flex-direction: column;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: var(--shadow-card-rest);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}
@media (min-width: 768px) {
    .crs-module-card-vertical { display: flex; }
}
.crs-module-card-vertical:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
    border-color: var(--border-strong);
}
.crs-module-card-vertical .crs-cover--module {
    position: relative;
}
.crs-module-card-vertical .crs-pill-status {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 5;
}
.crs-module-card-body {
    padding: 12px 14px 14px;
}
.crs-module-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.crs-module-card-meta {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Active module card */
.crs-module-card-vertical.is-active {
    border-color: var(--course-warm-border);
}
.crs-module-card-vertical.is-active .crs-cover--module {
    background:
        radial-gradient(ellipse at 50% 80%, rgba(255,107,0,0.12) 0%, transparent 50%),
        var(--course-cover-bg);
}

/* Progress bar overlay on cover */
.crs-cover-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 5;
    padding: 8px 10px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    display: flex;
    align-items: center;
    gap: 8px;
}
.crs-cover-progress-bar {
    flex: 1;
    height: 3px;
    background: rgba(255,255,255,0.15);
    border-radius: 2px;
    overflow: hidden;
}
.crs-cover-progress-fill {
    height: 100%;
    background: var(--color-brand);
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}
.crs-cover-progress-text {
    font-size: 10px;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    white-space: nowrap;
}

/* ── MODULE CARD HORIZONTAL (mobile) ─────────────────────────── */
.crs-module-card-horizontal {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all var(--dur-base) var(--ease-standard);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}
@media (min-width: 768px) {
    .crs-module-card-horizontal { display: none; }
}
.crs-module-card-horizontal:hover {
    background: var(--bg-hover);
    border-color: var(--border-strong);
}
.crs-module-card-horizontal .crs-cover--module {
    width: 56px;
    height: 40px;
    aspect-ratio: auto;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}
.crs-module-card-horizontal .crs-cover--module-num {
    font-size: 14px;
}
.crs-module-card-horizontal.is-active {
    border-color: var(--course-warm-border);
    background: var(--course-warm-bg);
}

/* ── LESSON ROW ──────────────────────────────────────────────── */
.crs-lesson-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    transition: all var(--dur-fast) var(--ease-standard);
    text-decoration: none;
    color: inherit;
}
.crs-lesson-row:hover {
    background: var(--bg-hover);
}
.crs-lesson-row.is-active {
    background: var(--course-warm-bg);
    border: 0.5px solid var(--course-warm-border);
}

.crs-lesson-indicator {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 10px;
    font-weight: 600;
}
.crs-lesson-indicator--completed {
    background: #EAF3DE;
    color: #3A6D11;
}
.crs-lesson-indicator--active {
    background: var(--color-primary);
    color: white;
}
.crs-lesson-indicator--pending {
    background: transparent;
    border: 1.5px solid var(--border-default);
    color: var(--text-disabled);
}

.crs-lesson-thumb {
    width: 80px;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
}
.crs-lesson-thumb--pending { opacity: 0.5; }

.crs-lesson-content {
    flex: 1;
    min-width: 0;
}
.crs-lesson-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.crs-lesson-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ── PROGRESS BAR ────────────────────────────────────────────── */
.crs-progress-bar {
    height: 4px;
    background: var(--bg-active);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.crs-progress-bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ── BREADCRUMB BAR ──────────────────────────────────────────── */
.crs-breadcrumb-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 0;
    font-size: 13px;
    color: var(--text-tertiary);
    flex-wrap: wrap;
}
.crs-breadcrumb-bar a {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease-standard);
}
.crs-breadcrumb-bar a:hover { color: var(--color-primary); }
.crs-breadcrumb-bar .current { color: var(--text-secondary); }
.crs-breadcrumb-sep { opacity: 0.3; }

/* ── CONTINUE CARD ───────────────────────────────────────────── */
.crs-continue-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--course-warm-bg);
    border: 0.5px solid var(--course-warm-border);
    border-radius: var(--radius-xl);
    transition: all var(--dur-base) var(--ease-standard);
    text-decoration: none;
    color: inherit;
}
.crs-continue-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-1px);
}
.crs-continue-cover {
    width: 64px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--course-cover-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
    position: relative;
}
.crs-continue-info { flex: 1; min-width: 0; }
.crs-continue-eyebrow {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--course-accent-text);
    margin-bottom: 2px;
}
.crs-continue-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.crs-continue-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ── MODULE HERO (detail page) ───────────────────────────────── */
.crs-module-hero {
    position: relative;
    padding: 28px 24px 24px;
    background: var(--course-warm-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
}
.crs-module-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,107,0,0.08) 0%, transparent 60%);
    pointer-events: none;
}
.crs-module-hero-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.crs-module-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(22px, 4vw, 28px);
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.2;
    margin-bottom: 8px;
}
.crs-module-hero p {
    font-size: 14px;
    color: var(--text-tertiary);
    line-height: 1.6;
    max-width: 540px;
    margin-bottom: 16px;
}
.crs-module-hero-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
}
.crs-module-hero-stats {
    display: flex;
    gap: 18px;
}

/* ── LESSONS LIST (module detail) ────────────────────────────── */
.crs-lessons-section {
    padding: 20px 24px;
}
.crs-lessons-section h3 {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

/* ── MODULE NAV ──────────────────────────────────────────────── */
.crs-module-nav {
    display: flex;
    gap: 8px;
    padding: 0 24px 24px;
}
.crs-module-nav-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--dur-base) var(--ease-standard);
    cursor: pointer;
    border: none;
}
.crs-module-nav-btn--prev {
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
}
.crs-module-nav-btn--prev:hover { background: var(--bg-hover); }
.crs-module-nav-btn--next {
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    color: var(--text-primary);
}
.crs-module-nav-btn--next:hover { background: var(--bg-hover); }
.crs-module-nav-btn:disabled,
.crs-module-nav-btn[disabled] {
    opacity: 0.4;
    pointer-events: none;
}

/* ── PROGRESS CARD ───────────────────────────────────────────── */
.crs-progress-card {
    padding: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}
.crs-progress-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}
.crs-progress-card-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}
.crs-progress-card-pct {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
}
.crs-progress-card-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 8px;
    display: flex;
    gap: 12px;
}

/* ── OVERVIEW HERO ───────────────────────────────────────────── */
.crs-overview-hero {
    padding: 24px 0 16px;
}
.crs-overview-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(24px, 5vw, 36px);
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.1;
    margin: 8px 0;
}
.crs-overview-meta {
    font-size: 13px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* ── ANIMATIONS ──────────────────────────────────────────────── */
@keyframes crs-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.crs-anim { animation: crs-fade-up 0.5s ease forwards; }
.crs-anim-d1 { animation-delay: 0.1s; opacity: 0; }
.crs-anim-d2 { animation-delay: 0.2s; opacity: 0; }
.crs-anim-d3 { animation-delay: 0.3s; opacity: 0; }