.hero-carousel {
    position: relative;
    overflow: hidden;
}

.hero-track {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
}

.hero-slide {
    flex: 0 0 100%;
    width: 100%;
    display: block;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.navigation-dots {
    text-align: center;
    margin-top: 10px;
}

.navigation-dots span {
    display: inline-block;
    width: 10px;
    height: 10px;
    margin: 0 5px;
    background-color: #bbb;
    border-radius: 50%;
    cursor: pointer;
}

.navigation-dots span.active {
    background-color: #717171;
}
/* Minimal styles for the admin console */
:root {
    --bg: #0b0f0d;
    --panel: #111915;
    --border: #1d2a22;
    --text: #e8efe9;
    --muted: #8ca195;
    --accent: #3bb273;
    --accent-strong: #2f8c5c;
    --danger: #c44536;
    --radius: 10px;
    --shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
    --font: "Segoe UI", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

body[data-theme="light"] {
    --bg: #f7f7f2;
    --panel: #ffffff;
    --border: #d8e0d7;
    --text: #1f2a21;
    --muted: #5f6c63;
    --accent: #3bb273;
    --accent-strong: #2f8c5c;
    --danger: #c44536;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}
.cat-list{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.cat-item{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--panel)}
.cat-item.selected{border-color:var(--accent);box-shadow:0 6px 18px color-mix(in srgb, var(--accent) 18%, transparent);background:color-mix(in srgb, var(--accent) 12%, transparent)}
.cat-name{font-weight:600}
.cat-actions{display:flex;gap:6px}
.cat-actions .btn{padding:4px 8px}
.cat-name{display:flex;align-items:center;gap:8px}
.cat-cover{width:36px;height:26px;object-fit:cover;border-radius:6px;border:1px solid var(--border);background:color-mix(in srgb, var(--panel) 80%, #000 20%)}
.cat-cover-preview{margin-top:8px;width:320px;height:180px;border:1px solid var(--border);border-radius:10px;overflow:hidden;display:block;background:color-mix(in srgb, var(--panel) 88%, #000 12%);position:relative}
.cat-cover-preview img{width:100%;height:100%;object-fit:cover;display:block}
.cat-cover-preview.is-placeholder img{filter:grayscale(0.2);opacity:0.9}
.course-cover-preview{margin-top:8px;width:320px;height:180px;border:1px solid var(--border);border-radius:10px;overflow:hidden;display:block;background:color-mix(in srgb, var(--panel) 88%, #000 12%);position:relative}
.course-cover-preview img{width:100%;height:100%;object-fit:cover;display:block}
.course-cover-preview.is-placeholder img{filter:grayscale(0.2);opacity:0.9}

/* Category modal two-column layout */
.cat-modal-grid{display:grid;grid-template-columns:280px 1fr;gap:16px;align-items:start}
.cat-pane__title{margin:0 0 8px;font-size:14px;color:var(--muted)}
.cat-pane--list{max-height:60vh;overflow:auto}
.cat-pane--form{max-height:60vh;overflow:auto}

@media (max-width: 720px){
    .cat-modal-grid{grid-template-columns:1fr}
    .cat-pane--list,.cat-pane--form{max-height:none}
}
.cat-badge,.cat-dot,.is-green,.is-blue,.is-orange,.is-purple,.is-teal,.is-pink,.is-gray,.color-palette,.color-swatch{display:none}

body[data-theme="blue"] {
    --bg: #0b1220;
    --panel: #0f1828;
    --border: #15233a;
    --text: #e3ecff;
    --muted: #8ea6c7;
    --accent: #4da3ff;
    --accent-strong: #2d7edb;
    --danger: #e26d5c;
    --shadow: 0 16px 48px rgba(5, 34, 68, 0.35);
}

body[data-theme="amber"] {
    --bg: #120d08;
    --panel: #1a120c;
    --border: #2a1b0f;
    --text: #f9e8d0;
    --muted: #c9b298;
    --accent: #f6a900;
    --accent-strong: #d48500;
    --danger: #e05a47;
    --shadow: 0 16px 48px rgba(64, 34, 6, 0.42);
}

/* Login page */
.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px;background:linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, #000 4%), color-mix(in srgb, var(--panel) 92%, #000 8%))}
.login-card{width:100%;max-width:360px;border:1px solid var(--border);border-radius:12px;background:linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, #000 4%), color-mix(in srgb, var(--panel) 98%, #000 2%));box-shadow:var(--shadow);padding:20px;}
.login-card h1{font-size:20px;margin:0 0 12px}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    background:
        radial-gradient(circle at 12% 18%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 40%),
        radial-gradient(circle at 78% 6%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 42%),
        linear-gradient(140deg, color-mix(in srgb, var(--bg) 96%, #000 4%), var(--bg) 55%, color-mix(in srgb, var(--bg) 96%, #000 4%) 100%);
    color: var(--text);
    background-size: cover;
}

body[data-theme="light"] {
    background:
        radial-gradient(circle at 12% 18%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 42%),
        radial-gradient(circle at 78% 6%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 44%),
        linear-gradient(150deg, #ffffff, #f4f5ef 55%, #f9faf6 100%);
}


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

a:hover { color: var(--accent-strong); }

.brand { font-weight: 700; letter-spacing: 0.2px; }
.meta { color: var(--muted); font-size: 14px; }

.brand-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 80%, #000 20%);
    display: block;
}

.main { display: flex; flex-direction: column; gap: 16px; }

.panel {
    background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 88%, #000 12%), color-mix(in srgb, var(--panel) 96%, #000 4%));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

body[data-theme="light"] .panel {
    background: linear-gradient(180deg, #ffffff, #f6f7f2);
    border-color: #e2e6dd;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.panel h2 { margin: 0 0 12px; font-size: 18px; }

.main-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    flex-wrap: wrap;
    padding: 8px 12px;
}
.user-meta { display: flex; flex-direction: column; gap: 2px; line-height: 1.2; }
.user-name { font-weight: 700; font-size: 13px; }
.user-info { color: var(--muted); font-size: 11px; }
.main-actions { display: flex; gap: 6px; align-items: center; }
.main-top .btn { padding: 8px 10px; font-size: 12px; }

.theme-dots { display: inline-flex; align-items: center; gap: 8px; }
.theme-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--accent);
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}
.theme-dot span { display: none; }
.theme-dot:hover { transform: translateY(-1px); border-color: var(--accent); box-shadow: 0 4px 12px rgba(0,0,0,0.25); }
.theme-dot.active { box-shadow: 0 0 0 2px var(--accent-strong); }
.theme-dot[data-theme="light"] { background: #e8f7e8; border-color: #b7d6b7; }
.theme-dot[data-theme="blue"] { background: #4da3ff; border-color: #1f6fca; }
.theme-dot[data-theme="amber"] { background: #f6a900; border-color: #b87400; }

.theme-auto {
    font-size: 12px;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 4px 8px;
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
    transition: border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}
.theme-auto:hover { border-color: var(--accent); box-shadow: 0 3px 10px color-mix(in srgb, var(--accent) 18%, transparent); }
.theme-auto.active { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--text); border-color: var(--accent); }
body[data-theme="light"] .theme-auto { background: #fafaf7; border-color: #e2e6dd; }

.hero-page { gap: 12px; }

.hero-hero {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    align-items: center;
}

.hero-text h1 { margin: 6px 0 8px; font-size: 24px; }
.hero-badge { display: inline-flex; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--accent); background: color-mix(in srgb, var(--accent) 16%, transparent); font-size: 12px; }
.hero-actions { display: flex; gap: 10px; margin-top: 10px; }

.hero-fig { position: relative; height: 180px; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 14%, transparent), color-mix(in srgb, var(--accent) 6%, transparent)); box-shadow: 0 10px 28px rgba(0,0,0,0.18); }
.hero-fig-inner { position: absolute; inset: 0; display: flex; overflow: hidden; }
.hero-preview-track { display: flex; width: 100%; height: 100%; transition: transform 0.6s ease; }
.hero-preview-slide { position: relative; flex: 0 0 100%; width: 100%; height: 100%; background-size: cover; background-position: center; }
.hero-preview-cap { position: absolute; inset: auto 0 0 0; padding: 14px; display: flex; flex-direction: column; gap: 6px; background: linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,0.65)); color: #fdfdfd; }
.hero-preview-cap .cap-line { font-size: 14px; line-height: 1.4; text-shadow: 0 2px 8px rgba(0,0,0,0.45); }
.hero-preview-cap .cap-line1 { font-weight: 700; font-size: 16px; }
.hero-preview-dots { position: absolute; inset: auto 0 10px 0; display: flex; justify-content: center; gap: 8px; }
.hero-preview-dots span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.45); cursor: pointer; transition: transform 120ms ease, background 120ms ease; }
.hero-preview-dots span.active { background: #fff; transform: scale(1.1); }

body[data-theme="light"] .hero-fig { background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, #ffffff 82%), color-mix(in srgb, var(--accent) 10%, #ffffff 90%)); }
body[data-theme="light"] .hero-fig-inner { background: radial-gradient(circle at 30% 40%, color-mix(in srgb, var(--accent) 28%, #ffffff 72%), transparent 48%), radial-gradient(circle at 70% 60%, color-mix(in srgb, var(--accent) 18%, #ffffff 82%), transparent 44%), linear-gradient(135deg, rgba(255,255,255,0.16), rgba(0,0,0,0.06)); }

.hero-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.metric { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; background: color-mix(in srgb, var(--panel) 92%, #000 8%); box-shadow: var(--shadow); }
.metric-label { color: var(--muted); font-size: 13px; margin-bottom: 4px; }
.metric-value { font-size: 22px; font-weight: 700; color: var(--accent); }

.hero-layout { position: relative; display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.hero-column { display: flex; flex-direction: column; gap: 12px; }
.hero-layout::after {
    content: '';
    position: absolute;
    inset: 12px auto 12px 50%;
    width: 8px;
    background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--accent) 60%, var(--border)), transparent);
    transform: translateX(-50%);
    pointer-events: none;
    border-radius: 999px;
}

@media (max-width: 800px) {
    .hero-layout::after { display: none; }
}
.hero-list-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.hero-list { display: flex; flex-direction: column; gap: 10px; }
.hero-item { display: grid; grid-template-columns: 180px 1fr auto; gap: 14px; padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: color-mix(in srgb, var(--panel) 94%, #000 6%); box-shadow: var(--shadow); align-items: center; }
.hero-thumb-wrap { position: relative; width: 180px; height: 110px; }
.hero-thumb { width: 100%; height: 100%; object-fit: cover; border-radius: 10px; border: 1px solid var(--border); background: color-mix(in srgb, var(--panel) 70%, #000 30%); display: block; }
.hero-thumb-overlay { position: absolute; inset: 0; display: flex; align-items: flex-end; border-radius: 10px; background: linear-gradient(180deg, rgba(0,0,0,0.08), rgba(0,0,0,0.65)); color: #fdfdfd; overflow: hidden; }
.hero-caption { width: 100%; padding: 8px; display: grid; gap: 4px; }
.hero-cap-title { font-weight: 700; font-size: 13px; line-height: 1.2; text-shadow: 0 1px 2px rgba(0,0,0,0.45); }
.hero-cap-line { font-size: 12px; line-height: 1.3; text-shadow: 0 1px 2px rgba(0,0,0,0.35); }

body[data-theme="light"] .hero-item { background: #ffffff; border-color: #e4e7df; box-shadow: 0 10px 26px rgba(0, 0, 0, 0.06); }
body[data-theme="light"] .hero-thumb { background: #f1f2ec; border-color: #e4e7df; }
body[data-theme="light"] .hero-thumb-overlay { color: #0b0f0d; background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(0,0,0,0.35)); }
body[data-theme="light"] .metric { background: #ffffff; border-color: #e4e7df; box-shadow: 0 10px 26px rgba(0, 0, 0, 0.06); }
.hero-info { display: grid; gap: 6px; }
.hero-title { font-weight: 700; display: flex; gap: 8px; align-items: center; }
.hero-meta { color: var(--muted); font-size: 13px; line-height: 1.4; }
.pill { padding: 2px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--border); color: var(--accent); background: color-mix(in srgb, var(--accent) 16%, transparent); }
.pill.off { color: var(--muted); background: rgba(255,255,255,0.06); }
body[data-theme="light"] .pill.off { background: rgba(0,0,0,0.04); }
.hero-actions-row { display: flex; gap: 8px; }

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.actions { display: flex; gap: 8px; }

/* Course page head: compact height, left title + right actions */
.course-head { padding: 8px 14px; gap: 10px; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; }
.course-head h1 { margin: 2px 0 4px; font-size: 24px; }
.course-head .meta { margin: 0; line-height: 1.3; }
.course-head > div:first-child { display:flex; flex-direction:column; gap:4px; }
.course-head .hero-actions { margin-left:auto; display:flex; align-items:center; gap:8px; flex-wrap:wrap; }

.form { display: flex; flex-direction: column; gap: 12px; }
.form.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; align-items: end; }
.field { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font-size: 14px; }
.field.inline { flex-direction: row; align-items: center; gap: 8px; }
.field input {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 80%, #000 20%);
    color: var(--text);
    outline: none;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2); }

/* Form selects (e.g., 分类下拉) */
.field select {
    padding: 10px 36px 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: color-mix(in srgb, var(--panel) 80%, #000 20%);
    color: var(--text);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238ca195' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 12px 12px;
}
.field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2); }

body[data-theme="light"] .field select {
    background-color: #f8f8f5;
    border-color: #dfe3da;
    color: var(--text);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235f6c63' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

.upload-box {
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    background: color-mix(in srgb, var(--panel) 92%, #000 8%);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.upload-instructions { color: var(--text); font-size: 13px; }
.upload-meta { font-size: 12px; }
.upload-box.dragover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--panel)); }
.upload-preview { width: 100%; max-width: 320px; height: 180px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; display: none; }
.upload-preview img { width: 100%; height: 100%; object-fit: cover; display: block; }

body[data-theme="light"] .upload-box { background: #fafaf7; border-color: #e2e6dd; }
body[data-theme="light"] .upload-box.dragover { background: color-mix(in srgb, var(--accent) 10%, #ffffff); }

body[data-theme="light"] .field input { background: #f8f8f5; border-color: #dfe3da; }
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2); }

.btn {
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 88%, #000 12%);
    color: var(--text);
    cursor: pointer;
    transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease, background 120ms ease;
}
.btn:hover { border-color: var(--accent); box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 22%, transparent); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-strong)); color: #0b0f0d; font-weight: 600; border: 1px solid var(--accent-strong); }
.btn.ghost { background: transparent; }
.btn.danger { background: transparent; color: var(--danger); border-color: rgba(196, 69, 54, 0.4); }
.btn.danger:hover { border-color: var(--danger); box-shadow: 0 6px 18px rgba(196, 69, 54, 0.22); }

body[data-theme="light"] .btn { background: #f6f6f2; border-color: #e2e6dd; }
body[data-theme="light"] .btn:hover { box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 18%, transparent); }

.status {
    min-height: 20px;
    margin: 6px 0 12px;
    color: var(--muted);
    font-size: 14px;
}

.toast-layer {
    position: fixed;
    inset: 0;
    z-index: 2600;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 18px;
    pointer-events: none;
}

.toast {
    min-width: min(520px, 92vw);
    max-width: min(620px, 92vw);
    padding: 16px 20px;
    border-radius: 16px;
    background: linear-gradient(135deg, #243447, #0f1622);
    color: #f8fbff;
    border: 1px solid rgba(255,255,255,0.14);
    box-shadow: 0 18px 46px rgba(0,0,0,0.28);
    font-size: 16px;
    line-height: 1.6;
    transform: translateY(10px);
    opacity: 0;
    text-align: center;
    animation: toast-in 200ms ease forwards, toast-out 240ms ease forwards 2.4s;
}

.toast.success { border-color: rgba(94, 222, 145, 0.5); color: #e9fff3; }
.toast.error { border-color: rgba(255, 107, 107, 0.5); color: #ffecec; }
.toast.warn { border-color: rgba(255, 193, 94, 0.6); color: #fff7e8; }

@keyframes toast-in { from { opacity: 0; transform: translateY(10px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(-8px) scale(0.98); } }

body[data-theme="light"] .toast {
    background: linear-gradient(135deg, #1b2a3a, #0d1724);
    border-color: rgba(255,255,255,0.16);
    color: #f8fbff;
}

.empty { color: var(--muted); }

.status {
    min-height: 20px;
    margin: 6px 0 12px;
    color: var(--muted);
    font-size: 14px;
}

.empty { color: var(--muted); }

@media (max-width: 640px) {
    .panel-head { flex-direction: column; align-items: flex-start; }
}

/* Courses page */
.course-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.course-list-panel { display: flex; flex-direction: column; gap: 8px; }
.course-list { display: flex; flex-direction: column; gap: 4px; }
.course-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 8px;
    background: color-mix(in srgb, var(--panel) 94%, #000 6%);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 96px 1fr auto;
    gap: 6px;
    align-items: center;
    cursor: pointer;
    transition: border-color 120ms ease, transform 120ms ease;
}
.course-card:hover { border-color: var(--accent); }
.course-card.selected { border-color: var(--accent); box-shadow: 0 10px 26px color-mix(in srgb, var(--accent) 18%, transparent); }
.course-cat{display:inline-flex;align-items:center;gap:6px;margin:4px 0;color:var(--muted);font-size:12px}
.course-cat img{width:18px;height:12px;object-fit:cover;border-radius:4px;border:1px solid var(--border);background:color-mix(in srgb, var(--panel) 80%, #000 20%)}

/* Custom category select with thumbnails */
.cat-select{position:relative}
.cat-select__btn{display:inline-flex;align-items:center;gap:8px;min-width:160px}
.cat-select__btn .thumb{width:18px;height:12px;border-radius:4px;border:1px solid var(--border);object-fit:cover;background:color-mix(in srgb, var(--panel) 80%, #000 20%)}
.cat-select__btn .label{font-size:13px;color:var(--text)}
.cat-select__menu{position:absolute;z-index:1000;top:calc(100% + 6px);left:0;min-width:220px;max-height:260px;overflow:auto;border:1px solid var(--border);border-radius:10px;background:linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, #000 8%), color-mix(in srgb, var(--panel) 98%, #000 2%));box-shadow:var(--shadow);display:none}
.cat-select.open .cat-select__menu{display:block}
.cat-option{display:flex;align-items:center;gap:10px;padding:8px 10px;cursor:pointer}
.cat-option:hover{background:color-mix(in srgb, var(--accent) 10%, transparent)}
.cat-option.selected{background:color-mix(in srgb, var(--accent) 16%, transparent)}
.cat-option .thumb{width:28px;height:18px;border-radius:6px;border:1px solid var(--border);object-fit:cover;background:color-mix(in srgb, var(--panel) 80%, #000 20%)}
.cat-option .name{font-size:13px;color:var(--text)}
.cat-option .meta{margin-left:auto;font-size:12px;color:var(--muted)}

body[data-theme="light"] .cat-select__menu{background:#ffffff;border-color:#e4e7df;box-shadow:0 12px 32px rgba(0,0,0,.08)}
body[data-theme="light"] .cat-option:hover{background:rgba(0,0,0,0.03)}
body[data-theme="light"] .cat-option.selected{background:rgba(0,0,0,0.05)}
.course-cover { width: 96px; height: 72px; border-radius: 8px; object-fit: cover; border: 1px solid var(--border); background: color-mix(in srgb, var(--panel) 70%, #000 30%); }
.course-meta { display: flex; flex-direction: column; gap: 4px; margin-bottom: 0; padding-bottom: 8px; border-bottom: 1px dashed var(--border); }
.course-meta .meta-row { display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.course-meta .meta { font-size: 11px; }
.course-title { display:flex; align-items:center; gap:8px; font-weight:700; }
.course-caret { width:10px; height:10px; border-right:2px solid var(--muted); border-bottom:2px solid var(--muted); transform:rotate(45deg); transition: transform 160ms ease, border-color 160ms ease; }
.course-card.expanded .course-caret { transform:rotate(-135deg); border-color: var(--accent); }
.course-actions { display: flex; flex-direction: row; flex-wrap: wrap; gap: 8px; justify-content: flex-end; align-items: center; }
.lesson-list { grid-column: 1 / -1; display: grid; gap: 6px; margin-top: 6px; padding: 10px; border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border)); border-radius: 10px; background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, transparent), color-mix(in srgb, var(--panel) 92%, #000 8%)); box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 16%, transparent); position: relative; }
.lesson-list { grid-column: 1 / -1; display: grid; gap: 6px; margin-top: 6px; padding: 10px; border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border)); border-radius: 10px; background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--panel) 92%, #000 8%)); box-shadow: 0 10px 26px color-mix(in srgb, var(--accent) 24%, transparent); position: relative; }
.lesson-header { font-size: 12px; color: var(--muted); padding-bottom: 6px; border-bottom: 1px dashed var(--border); margin-bottom: 6px; }
.lesson-grid{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-start}
.lesson-tile{position:relative;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:color-mix(in srgb, var(--panel) 92%, #000 8%);height:180px;flex:0 0 auto}
.lesson-tile video{height:100%;width:auto;max-width:none;object-fit:cover;display:block;background:#000}
.lesson-tile__meta{position:absolute;left:6px;top:6px;display:flex;gap:6px;flex-wrap:wrap}
.lesson-tile__meta .pill{padding:2px 6px;font-size:11px;border-radius:999px;border:1px solid color-mix(in srgb, var(--accent) 40%, var(--border));background:color-mix(in srgb, var(--accent) 18%, transparent);color:#fff;box-shadow:0 4px 12px rgba(0,0,0,0.22)}
.lesson-tile__title{position:absolute;left:0;right:0;bottom:0;padding:3px 8px;font-size:12px;color:#fff;background:linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,.55))}
.lesson-tile__actions{position:absolute;top:6px;right:6px;display:flex;gap:6px}
.lesson-tile:hover{border-color:var(--accent);box-shadow:0 8px 22px color-mix(in srgb, var(--accent) 22%, transparent)}
.lesson-list::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 3px; border-top-left-radius: 10px; border-top-right-radius: 10px; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 70%, transparent), color-mix(in srgb, var(--accent-strong) 60%, transparent)); }
.lesson-list::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 4px; border-top-left-radius: 10px; border-top-right-radius: 10px; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 80%, transparent), color-mix(in srgb, var(--accent-strong) 66%, transparent)); }
.lesson-item { border: 1px dashed var(--border); border-radius: 8px; padding: 8px; display: grid; grid-template-columns: 1fr auto; gap: 6px; align-items: center; }
.lesson-item { position: relative; padding-left: 12px; transition: border-color 140ms ease, background 140ms ease, transform 140ms ease; }
.lesson-item::before { content: ''; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 3px; border-radius: 3px; background: color-mix(in srgb, var(--accent) 70%, transparent); }
.lesson-item:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); background: color-mix(in srgb, var(--accent) 8%, transparent); transform: translateY(-1px); }
.lesson-item::before { content: ''; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 3px; border-radius: 3px; background: color-mix(in srgb, var(--accent) 80%, transparent); }
.lesson-item:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); background: color-mix(in srgb, var(--accent) 12%, transparent); transform: translateY(-1px); }
.lesson-item:nth-child(even) { background: color-mix(in srgb, var(--panel) 96%, #000 4%); }
.lesson-title { font-weight: 600; }
.lesson-title { color: var(--text); }
.lesson-video { color: var(--muted); font-size: 11px; word-break: break-all; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-meta-row { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.chip { display:inline-flex; align-items:center; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); font-size: 11px; color: var(--text); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.chip { display:inline-flex; align-items:center; padding: 2px 8px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--accent) 50%, var(--border)); font-size: 11px; color: var(--text); background: color-mix(in srgb, var(--accent) 16%, transparent); }
.lesson-actions { display: flex; gap: 6px; }
.form-actions { display: flex; gap: 8px; }
.field textarea {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 80%, #000 20%);
    color: var(--text);
    resize: vertical;
}
body[data-theme="light"] .field textarea { background: #f8f8f5; border-color: #dfe3da; }
@media (max-width: 1100px) {
    .course-card { grid-template-columns: 100px 1fr; grid-template-areas: "cover info" "lessons lessons"; }
    .lesson-list { grid-area: lessons; }
}

.course-card.collapsed .lesson-list { max-height: 0; opacity: 0; overflow: hidden; transform: translateY(-2px); padding: 0; border-width: 0; box-shadow: none; }
.course-card.collapsed .lesson-list::before { display: none; }
/* Emphasize expanded course card */
.course-card.expanded { border-color: var(--accent); box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 18%, transparent); background: color-mix(in srgb, var(--panel) 96%, #000 4%); }
body[data-theme="light"] .lesson-list { background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 8%, #ffffff), #ffffff); border-color: #e4e7df; box-shadow: 0 8px 22px rgba(0,0,0,0.06); }
body[data-theme="light"] .lesson-list { background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, #ffffff), #ffffff); border-color: color-mix(in srgb, var(--accent) 20%, #e4e7df); box-shadow: 0 10px 26px rgba(0,0,0,0.08); }
body[data-theme="light"] .lesson-tile__title{color:#0b0f0d}
body[data-theme="light"] .lesson-item:nth-child(even) { background: rgba(0,0,0,0.02); }
body[data-theme="light"] .lesson-item:hover { background: color-mix(in srgb, var(--accent) 8%, #ffffff); }
body[data-theme="light"] .chip { background: rgba(0,0,0,0.04); border-color: #e4e7df; color: #1f2a21; }
body[data-theme="light"] .chip { background: color-mix(in srgb, var(--accent) 14%, #ffffff); border-color: color-mix(in srgb, var(--accent) 20%, #e4e7df); color: #1f2a21; }

/* Modal */
.modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; z-index: 999; }
.modal.open { display: flex; }
.modal__overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.45); backdrop-filter: blur(2px); }
.modal__dialog { position: relative; z-index: 1; background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: 12px; padding: 18px; box-shadow: var(--shadow); width: min(520px, 92vw); max-height: 88vh; overflow: auto; }
.modal__header { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.modal__header h3 { margin: 0; }

/* Wider dialog for category management */
#category-modal .modal__dialog { width: min(960px, 96vw); }