/* ═══════════════════════════════════════════════════════════════
   UNIVERSAL COURSE LAYOUT — CSS
   Works for ALL courses — no course-specific selectors.
   Data-driven: colors come from CSS variables set per course.
   ═══════════════════════════════════════════════════════════════ */

/* ═══ HERO SECTION ═══ */
.uc-hero {
    position: relative;
    min-height: 420px;
    border-radius: 24px;
    overflow: hidden;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-mid) 50%, var(--gradient-end) 100%);
}

/* Floating Particles */
.uc-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.uc-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--glow-color);
    opacity: 0;
    animation: ucParticleFloat 4s ease-in-out infinite;
}

@keyframes ucParticleFloat {
    0%, 100% { opacity: 0; transform: translateY(0) scale(0.5); }
    50% { opacity: 0.6; transform: translateY(-20px) scale(1); }
}

/* Hero Content */
.uc-hero-content {
    position: relative;
    z-index: 2;
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: #fff;
}

/* Course Icon with Glow */
.uc-icon-wrapper {
    position: relative;
    margin-bottom: 16px;
}

.uc-icon-glow {
    position: absolute;
    inset: -12px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
    opacity: 0.4;
    animation: ucGlowPulse 3s ease-in-out infinite;
}

@keyframes ucGlowPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

.uc-course-icon {
    font-size: 64px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
    line-height: 1;
}

/* Title & Description */
.uc-course-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    margin: 0 0 8px;
    line-height: 1.2;
}

.uc-course-desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    max-width: 600px;
    line-height: 1.6;
    margin: 0 0 24px;
}

/* Stat Cards */
.uc-hero-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 32px;
}

.uc-stat-card {
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 100px;
    transition: transform 0.3s ease, background 0.3s ease;
}

.uc-stat-card:hover {
    transform: translateY(-4px);
    background: rgba(255,255,255,0.18);
}

.uc-stat-icon { font-size: 24px; }
.uc-stat-value { font-size: 1.5rem; font-weight: 700; color: #fff; }
.uc-stat-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Progress Orbit */
.uc-orbit-wrapper {
    position: relative;
    width: 180px;
    height: 180px;
}

.uc-orbit { width: 100%; height: 100%; }

.uc-orbit-fill {
    transition: stroke-dashoffset 1.5s ease-in-out;
}

.uc-orbit-center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.uc-orbit-percent {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
}

.uc-orbit-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ═══ CURRICULUM SECTION ═══ */
.uc-curriculum {
    padding: 0 16px;
    margin-bottom: 40px;
}

.uc-section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--tw-prose-headings, #1e293b);
}

/* Module Block */
.uc-module {
    margin-bottom: 24px;
    border-radius: 16px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f1f5f9;
}

.uc-module-header {
    padding: 20px 24px;
    background: var(--card-bg, #f8fafc);
    border-bottom: 2px solid var(--course-primary, #2563eb);
    display: flex;
    align-items: center;
    gap: 12px;
}

.uc-module-number {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--course-primary, #2563eb);
}

.uc-module-title {
    font-size: 1.1rem;
    font-weight: 700;
    flex: 1;
    margin: 0;
}

.uc-module-progress {
    font-size: 0.85rem;
    color: #64748b;
}

/* Chapter Items */
.uc-chapter-list {
    padding: 8px;
}

.uc-chapter {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s ease;
    border: 1px solid transparent;
    text-decoration: none;
    color: inherit;
}

.uc-chapter:hover:not(.uc-locked) {
    background: var(--card-bg, #f8fafc);
    border-color: var(--course-primary, #2563eb);
    transform: translateX(4px);
}

.uc-locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.uc-chapter-status {
    font-size: 20px;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.uc-chapter-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.uc-chapter-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: #1e293b;
}

.uc-chapter-meta {
    font-size: 0.8rem;
    color: #64748b;
}

.uc-chapter-lock {
    font-size: 0.75rem;
    color: #9ca3af;
    font-style: italic;
}

.uc-free-badge {
    background: var(--course-accent, #f59e0b);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.uc-chapter-action {
    color: var(--course-primary, #2563eb);
    font-weight: 700;
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.uc-chapter:hover .uc-chapter-action {
    opacity: 1;
}

/* ═══ STATS SECTION ═══ */
.uc-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.uc-stat-block {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #f1f5f9;
    transition: transform 0.3s ease;
}

.uc-stat-block:hover {
    transform: translateY(-3px);
}

.uc-stat-block-icon { font-size: 28px; }
.uc-stat-block-value { font-size: 1.3rem; font-weight: 700; color: #1e293b; }
.uc-stat-block-label { font-size: 0.8rem; color: #64748b; }

/* ═══ CERTIFICATE SECTION ═══ */
.uc-certificate {
    margin: 32px 0;
}

.uc-cert-card {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    color: #fff;
}

.uc-cert-icon { font-size: 48px; }
.uc-cert-card h3 { font-size: 1.5rem; margin: 12px 0 8px; font-weight: 800; }
.uc-cert-card p { opacity: 0.85; margin-bottom: 24px; }

.uc-cert-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.uc-cert-actions a,
.uc-cert-actions button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.uc-cert-btn-primary {
    background: #fff;
    color: var(--course-primary, #2563eb);
}
.uc-cert-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }

.uc-cert-btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
}
.uc-cert-btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

.uc-cert-btn-text {
    background: transparent;
    color: rgba(255,255,255,0.8);
}
.uc-cert-btn-text:hover { color: #fff; }

/* ═══ ANIMATIONS ═══ */
.uc-animate {
    animation: ucFadeUp 0.6s ease-out both;
    animation-delay: var(--delay, 0s);
}

.uc-animate-delay {
    animation: ucFadeUp 0.6s ease-out both;
    animation-delay: 0.2s;
}

@keyframes ucFadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ═══ SYNC INDICATOR ═══ */
.uc-sync {
    position: fixed;
    bottom: 16px;
    right: 16px;
    background: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 100;
    color: #64748b;
    border: 1px solid #f1f5f9;
}

/* ═══ ENROLL CTA (for non-enrolled users) ═══ */
.uc-enroll-bar {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    color: #fff;
    margin-bottom: 32px;
}

.uc-enroll-bar h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.uc-enroll-bar p {
    opacity: 0.85;
    margin-bottom: 20px;
}

.uc-enroll-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    color: var(--course-primary, #2563eb);
    padding: 14px 32px;
    border-radius: 14px;
    font-weight: 800;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.uc-enroll-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ═══ DARK MODE ═══ */
@media (prefers-color-scheme: dark) {
    .uc-module {
        background: #1e1e2e;
        border-color: #2d2d3f;
    }
    .uc-module-header {
        background: var(--card-bg-dark, #1a1a2e);
        border-bottom-color: var(--course-primary, #2563eb);
    }
    .uc-chapter:hover:not(.uc-locked) {
        background: rgba(255,255,255,0.05);
    }
    .uc-chapter-title { color: #e2e8f0; }
    .uc-module-title { color: #e2e8f0; }
    .uc-section-title { color: #e2e8f0; }
    .uc-stat-block {
        background: #1e1e2e;
        border-color: #2d2d3f;
    }
    .uc-stat-block-value { color: #e2e8f0; }
    .uc-stat-block-label { color: #94a3b8; }
    .uc-module-progress { color: #94a3b8; }
    .uc-sync {
        background: #1e1e2e;
        border-color: #2d2d3f;
        color: #94a3b8;
    }
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
    .uc-hero-content { padding: 32px 20px; }
    .uc-course-title { font-size: 1.5rem; }
    .uc-course-icon { font-size: 48px; }
    .uc-hero-stats { gap: 8px; }
    .uc-stat-card { padding: 12px 16px; min-width: 80px; }
    .uc-orbit-wrapper { width: 140px; height: 140px; }
    .uc-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .uc-module-header { padding: 16px; }
    .uc-chapter { padding: 12px 16px; gap: 12px; }
    .uc-cert-card { padding: 28px 20px; }
}

@media (max-width: 480px) {
    .uc-hero-stats { flex-direction: column; align-items: center; }
    .uc-stats-grid { grid-template-columns: 1fr; }
    .uc-hero { border-radius: 16px; min-height: 360px; }
    .uc-course-title { font-size: 1.3rem; }
}