:root {
    --color-bg: #faf8f5;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #6b6560;
    --color-accent: #8b7355;
    --color-accent-dark: #6d5a43;
    --color-border: #e8e4df;
    --color-error: #c0392b;
    --color-success: #27ae60;
    --color-info: #2980b9;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', system-ui, sans-serif;
    --radius: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,.06);
    --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }

.container { width: min(1120px, 92%); margin: 0 auto; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(250,248,245,.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-h);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-h);
}
.logo { display: flex; flex-direction: column; line-height: 1.1; }
.logo-reset {
    font-family: var(--font-serif);
    font-size: 1.5rem; font-weight: 600; letter-spacing: .15em;
    color: var(--color-text);
}
.logo-by { font-size: .65rem; letter-spacing: .2em; text-transform: uppercase; color: var(--color-muted); }
.nav-main { display: flex; align-items: center; gap: 1.25rem; }
.nav-main a { font-size: .9rem; color: var(--color-muted); font-weight: 500; }
.nav-main a:hover { color: var(--color-text); }

.main-content { flex: 1; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: .65rem 1.4rem; border-radius: var(--radius);
    font-size: .875rem; font-weight: 500; border: 1px solid transparent;
    cursor: pointer; transition: all .2s; font-family: inherit;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); color: #fff; }
.btn-outline { border-color: var(--color-accent); color: var(--color-accent); background: transparent; }
.btn-outline:hover { background: var(--color-accent); color: #fff; }
.btn-ghost { background: transparent; color: var(--color-muted); border: none; }
.btn-ghost:hover { color: var(--color-text); }
.btn-danger { background: var(--color-error); color: #fff; }
.btn-sm { padding: .4rem .85rem; font-size: .8rem; }
.btn-lg { padding: .85rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* Hero */
.hero {
    padding: 6rem 0 5rem;
    text-align: center;
    background: linear-gradient(180deg, #fff 0%, var(--color-bg) 100%);
}
.hero-eyebrow {
    font-size: .75rem; letter-spacing: .25em; text-transform: uppercase;
    color: var(--color-accent); margin-bottom: 1.5rem;
}
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 500; line-height: 1.1; margin-bottom: 1.5rem;
}
.hero-title span { font-weight: 400; font-size: .55em; letter-spacing: .1em; display: block; margin-top: .5rem; color: var(--color-muted); }
.hero-text { max-width: 520px; margin: 0 auto 2.5rem; color: var(--color-muted); font-size: 1.05rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Features */
.features { padding: 4rem 0 6rem; }
.features-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem;
}
.feature-card {
    background: var(--color-surface); padding: 2rem; border-radius: var(--radius);
    box-shadow: var(--shadow); border: 1px solid var(--color-border);
}
.feature-card h3 { font-family: var(--font-serif); font-size: 1.4rem; margin-bottom: .75rem; }
.feature-card p { color: var(--color-muted); font-size: .95rem; }

/* Auth */
.auth-container { padding: 4rem 0; display: flex; justify-content: center; }
.auth-card {
    width: min(420px, 100%); background: var(--color-surface);
    padding: 2.5rem; border-radius: var(--radius); box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
}
.auth-card h1 { font-family: var(--font-serif); font-size: 2rem; margin-bottom: .5rem; }
.auth-sub { color: var(--color-muted); margin-bottom: 1.5rem; font-size: .9rem; }
.auth-footer { margin-top: 1.5rem; text-align: center; font-size: .875rem; color: var(--color-muted); }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: .8rem; font-weight: 500; margin-bottom: .4rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: .05em; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: .75rem 1rem; border: 1px solid var(--color-border);
    border-radius: var(--radius); font-family: inherit; font-size: .95rem;
    background: var(--color-bg); transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--color-accent);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.checkbox-group label { display: flex; align-items: center; gap: .5rem; text-transform: none; font-size: .9rem; margin-bottom: .5rem; }
.checkbox-group input { width: auto; }

/* Alerts */
.alert { padding: .85rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: .9rem; }
.alert-error { background: #fdecea; color: var(--color-error); border: 1px solid #f5c6cb; }
.alert-success { background: #eafaf1; color: var(--color-success); border: 1px solid #abebc6; }
.alert-info { background: #ebf5fb; color: var(--color-info); border: 1px solid #aed6f1; }

/* Student */
.page-header-block { padding: 3rem 0 1.5rem; }
.page-header-block h1 { font-family: var(--font-serif); font-size: 2.25rem; margin-bottom: .5rem; }
.page-header-block p { color: var(--color-muted); }

.courses-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem; padding-bottom: 4rem;
}
.course-card {
    background: var(--color-surface); padding: 1.75rem; border-radius: var(--radius);
    box-shadow: var(--shadow); border: 1px solid var(--color-border);
    display: flex; flex-direction: column; gap: .75rem;
}
.course-category {
    font-size: .7rem; letter-spacing: .15em; text-transform: uppercase;
    color: var(--color-accent); font-weight: 600;
}
.course-card h2 { font-family: var(--font-serif); font-size: 1.35rem; }
.course-card h2 a { color: inherit; }
.course-card p { color: var(--color-muted); font-size: .9rem; flex: 1; }

/* Course page */
.course-page { padding: 2rem 0 4rem; }
.back-link { display: inline-block; margin-bottom: 1.5rem; font-size: .875rem; color: var(--color-muted); }
.course-page h1 { font-family: var(--font-serif); font-size: 2.5rem; margin: .5rem 0 1.5rem; }
.course-description { color: var(--color-muted); margin-bottom: 2rem; max-width: 720px; }

.video-wrapper { margin-bottom: 2.5rem; }
.video-mask {
    position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;
    border-radius: var(--radius); background: #000; box-shadow: var(--shadow);
}
.video-mask iframe {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;
}
.video-mask::after {
    content: ''; position: absolute; bottom: 0; right: 0; width: 80px; height: 28px;
    background: var(--color-bg); pointer-events: none;
}

.pdf-section h2 { font-family: var(--font-serif); font-size: 1.5rem; margin-bottom: 1rem; }
.pdf-list { list-style: none; display: flex; flex-direction: column; gap: .75rem; }
.pdf-item {
    display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem;
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); transition: border-color .2s;
}
.pdf-item:hover { border-color: var(--color-accent); }
.pdf-icon {
    background: var(--color-accent); color: #fff; font-size: .65rem; font-weight: 700;
    padding: .35rem .5rem; border-radius: 4px; letter-spacing: .05em;
}
.pdf-name { flex: 1; font-weight: 500; color: var(--color-text); }
.pdf-size { font-size: .8rem; color: var(--color-muted); }

/* Status pages */
.status-container { padding: 5rem 0; display: flex; justify-content: center; }
.status-card {
    max-width: 520px; text-align: center; background: var(--color-surface);
    padding: 3rem 2.5rem; border-radius: var(--radius); box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
}
.status-card h1 { font-family: var(--font-serif); font-size: 1.75rem; margin-bottom: 1rem; }
.status-card p { color: var(--color-muted); margin-bottom: 1.5rem; }
.status-card .btn { margin: .25rem; }
.status-icon {
    width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center;
    justify-content: center; margin: 0 auto 1.5rem; font-size: 1.5rem;
}
.status-pending { background: #fef9e7; color: #d4ac0d; }
.status-expired { background: #f5eef8; color: var(--color-accent); }
.status-suspended { background: #fdecea; color: var(--color-error); }
.status-disabled { background: #f2f2f2; color: var(--color-muted); }
.status-premium { border-color: var(--color-accent); }
.status-reason { font-size: 1.05rem; color: var(--color-text); font-weight: 500; }

/* Footer */
.site-footer {
    padding: 2rem 0; border-top: 1px solid var(--color-border);
    text-align: center; font-size: .8rem; color: var(--color-muted);
}

.empty-state { text-align: center; padding: 3rem; color: var(--color-muted); }

/* Admin */
.admin-body { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px; background: #1a1a1a; color: #fff; padding: 1.5rem 0;
    flex-shrink: 0; position: sticky; top: 0; height: 100vh;
}
.admin-brand {
    padding: 0 1.5rem 1.5rem; font-size: .75rem; letter-spacing: .2em;
    text-transform: uppercase; color: var(--color-accent); border-bottom: 1px solid #333;
    margin-bottom: 1rem;
}
.admin-nav { display: flex; flex-direction: column; }
.admin-nav a {
    padding: .75rem 1.5rem; color: #aaa; font-size: .875rem; transition: all .2s;
}
.admin-nav a:hover, .admin-nav a.active { color: #fff; background: #2a2a2a; }
.admin-main { flex: 1; display: flex; flex-direction: column; }
.admin-topbar {
    padding: 1.5rem 2rem; border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}
.admin-topbar h1 { font-size: 1.25rem; font-weight: 600; }
.admin-content { padding: 2rem; flex: 1; }

.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem; margin-bottom: 2rem;
}
.stat-card {
    background: var(--color-surface); padding: 1.5rem; border-radius: var(--radius);
    border: 1px solid var(--color-border); text-align: center;
}
.stat-num { display: block; font-size: 2rem; font-weight: 600; color: var(--color-accent); }
.stat-label { font-size: .8rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: .05em; }

.table-wrap { overflow-x: auto; background: var(--color-surface); border-radius: var(--radius); border: 1px solid var(--color-border); }
.data-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.data-table th, .data-table td { padding: .85rem 1rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.data-table th { background: var(--color-bg); font-weight: 600; font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--color-muted); }
.actions-cell { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.inline-form { display: inline; }

.badge {
    display: inline-block; padding: .2rem .6rem; border-radius: 20px;
    font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
}
.badge-pending { background: #fef9e7; color: #b7950b; }
.badge-active { background: #eafaf1; color: #1e8449; }
.badge-trial { background: #ebf5fb; color: #2471a3; }
.badge-disabled { background: #f2f2f2; color: #666; }
.badge-suspended { background: #fdecea; color: #c0392b; }

.admin-grid-2 { display: grid; grid-template-columns: 1fr 1.5fr; gap: 2rem; }
.admin-panel { background: var(--color-surface); padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--color-border); }
.admin-panel h2 { font-size: 1rem; margin-bottom: 1rem; }
.admin-toolbar { margin-bottom: 1.5rem; }
.admin-form { max-width: 640px; }
.list-item { padding: 1rem 0; border-bottom: 1px solid var(--color-border); }
.inline-edit input, .inline-edit textarea { margin-bottom: .5rem; }
.inline-actions { display: flex; gap: .5rem; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.4); }
.modal-content {
    position: relative; background: var(--color-surface); padding: 2rem;
    border-radius: var(--radius); width: min(480px, 92%); max-height: 90vh; overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal-content h2 { font-size: 1.1rem; margin-bottom: 1.25rem; }
.modal-actions { display: flex; gap: .75rem; justify-content: flex-end; margin-top: 1rem; }

.pdf-admin-list { list-style: none; }
.pdf-admin-list li { display: flex; align-items: center; gap: .75rem; padding: .5rem 0; }

@media (max-width: 768px) {
    .admin-body { flex-direction: column; }
    .admin-sidebar { width: 100%; height: auto; position: static; }
    .admin-nav { flex-direction: row; flex-wrap: wrap; }
    .admin-nav a { padding: .5rem 1rem; }
    .form-row, .admin-grid-2 { grid-template-columns: 1fr; }
    .hero { padding: 4rem 0 3rem; }
}