/* ─── Site Header ────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 90;
    height: var(--header-height);
    background: rgba(13,13,13,.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    height: var(--header-height);
}

.nav-logo { flex-shrink: 0; }

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
}

.nav-link {
    padding: 7px 14px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    transition: all var(--transition);
    text-decoration: none;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: var(--bg-raised);
}

.nav-actions { display: flex; align-items: center; gap: var(--space-3); margin-left: auto; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ─── Hero ────────────────────────────────────────────────────── */
.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 60%, rgba(255,122,0,.12) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 20%, rgba(255,176,0,.08) 0%, transparent 45%);
    pointer-events: none;
}

.hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 760px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 6px 16px;
    border: 1px solid rgba(255,122,0,.3);
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    color: var(--orange);
    margin-bottom: var(--space-5);
    background: rgba(255,122,0,.06);
}

.hero-badge::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--orange);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-7);
    flex-wrap: wrap;
}

/* ─── Section titles ─────────────────────────────────────────── */
.section-title {
    margin-bottom: var(--space-7);
}

.section-title h2 { margin-bottom: var(--space-3); }
.section-title p  { color: var(--text-secondary); max-width: 560px; }

.section-title.centered {
    text-align: center;
}

.section-title.centered p { margin: 0 auto; }

/* ─── Content cards ──────────────────────────────────────────── */
.content-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.content-card:hover {
    border-color: var(--orange);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.content-card-thumb {
    aspect-ratio: 16/9;
    background: var(--bg-overlay);
    overflow: hidden;
    position: relative;
}

.content-card-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.content-card:hover .content-card-thumb img {
    transform: scale(1.04);
}

.content-card-type {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
}

.content-card-body {
    padding: var(--space-5);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.content-card-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.content-card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex: 1;
    margin-bottom: var(--space-4);
}

/* ─── Course card ────────────────────────────────────────────── */
.course-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: grid;
    grid-template-columns: 280px 1fr;
    transition: border-color var(--transition);
}

.course-card:hover { border-color: var(--border-strong); }

.course-card-cover {
    background: var(--bg-overlay);
    overflow: hidden;
}

.course-card-cover img {
    width: 100%; height: 100%;
    object-fit: cover;
}

.course-card-body { padding: var(--space-6); }

.course-card-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.course-card-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-5);
    line-height: 1.7;
}

.course-syllabus { margin-top: var(--space-4); }

.course-syllabus-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.syllabus-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.syllabus-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.syllabus-item::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--orange);
    flex-shrink: 0;
}

/* ─── Waitlist section ───────────────────────────────────────── */
.waitlist-section {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.waitlist-form {
    max-width: 540px;
    margin: 0 auto;
}

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: var(--space-9) 0 var(--space-6);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: var(--space-3);
    max-width: 260px;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.footer-social a {
    width: 36px; height: 36px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: all var(--transition);
}

.footer-social a:hover {
    border-color: var(--orange);
    color: var(--orange);
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-col ul li a:hover { color: var(--orange); }

.footer-newsletter-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.footer-newsletter-form {
    display: flex;
    gap: var(--space-2);
}

.footer-newsletter-form .form-control {
    font-size: 0.875rem;
}

.footer-bottom {
    padding-top: var(--space-6);
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Mobile nav ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0; right: 0;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-1);
        align-items: flex-start;
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: flex; }
    .nav-actions .btn { display: none; }

    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-col:last-child { grid-column: 1 / -1; }

    .course-card { grid-template-columns: 1fr; }
    .course-card-cover { height: 200px; }
}

@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-newsletter-form { flex-direction: column; }
}