:root {
    color-scheme: light;
    --ink: #111827;
    --ink-2: #243044;
    --muted: #667085;
    --line: #d7dee8;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --soft: #eef3f8;
    --primary: #155eef;
    --primary-2: #0e9384;
    --primary-dark: #0b3b95;
    --warning: #b54708;
    --danger: #b42318;
    --success: #087443;
    --shadow-sm: 0 1px 2px rgba(17,24,39,.06);
    --shadow: 0 16px 40px rgba(17,24,39,.10);
    --radius: 8px;
    --space: 24px;
    --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    color: var(--ink);
    background: #fff;
    font-size: 16px;
    line-height: 1.55;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 3px solid rgba(21,94,239,.25);
    outline-offset: 2px;
}
.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    transform: translateY(-140%);
    padding: 10px 12px;
    border-radius: 6px;
    background: var(--ink);
    color: #fff;
    font-weight: 800;
}
.skip-link:focus { transform: translateY(0); text-decoration: none; }
.site-header {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 0 max(24px, calc((100vw - var(--max)) / 2));
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
    box-shadow: 0 10px 30px rgba(17,24,39,.04);
}
.brand-block { display: grid; gap: 1px; color: var(--ink); }
.brand-block:hover { text-decoration: none; }
.brand { font-weight: 900; color: var(--ink); letter-spacing: 0; font-size: 19px; }
.brand-block span:last-child { color: var(--muted); font-size: 12px; font-weight: 800; }
nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
nav a { color: var(--ink-2); font-weight: 750; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 32px auto 56px; }
.site-footer { background: #0f172a; color: #dbe4f0; padding: 42px max(24px, calc((100vw - var(--max)) / 2)); margin-top: 86px; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 24px; }
.hero {
    min-height: 430px;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
    gap: 36px;
    align-items: center;
    padding: 56px;
    color: #fff;
    background:
        linear-gradient(135deg, rgba(15,23,42,.96), rgba(21,94,239,.82)),
        radial-gradient(circle at 78% 24%, rgba(14,147,132,.55), transparent 34%);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.hero h1 { max-width: 760px; margin: 0 0 16px; font-size: clamp(38px, 6vw, 66px); line-height: 1; letter-spacing: 0; }
.hero p { max-width: 720px; font-size: 18px; line-height: 1.7; color: #e7eef9; }
.hero-panel { background: rgba(255,255,255,.11); border: 1px solid rgba(255,255,255,.28); border-radius: var(--radius); padding: 24px; }
.eyebrow { text-transform: uppercase; font-size: 12px; letter-spacing: 0; font-weight: 800; color: var(--primary-2); }
.hero .eyebrow { color: #93e1d7; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.button, button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border: 0;
    border-radius: 6px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}
.button:hover, button:hover { background: var(--primary-dark); text-decoration: none; }
.button.secondary, button.secondary { background: #eaf1ff; color: var(--primary-dark); }
.button.ghost { background: transparent; color: inherit; border: 1px solid currentColor; }
.button.compact { min-height: 34px; padding: 0 12px; font-size: 13px; }
button.danger { background: var(--danger); }
button:disabled, .button[aria-disabled="true"] { opacity: .6; cursor: not-allowed; }
.inline-form { display: inline; }
.section { margin-top: 42px; }
.home-section { margin-top: 104px; }
.section-kicker { display: grid; gap: 8px; margin-bottom: 28px; }
.section-kicker h2 { margin: 0; color: #0f172a; font-size: clamp(30px, 4vw, 46px); line-height: 1.08; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-head h2 { margin: 0; font-size: 30px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.toolbar, .inline-actions, .pagination { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin: 18px 0 24px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-sm); }
.stat span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; text-transform: uppercase; }
.stat strong { font-size: 28px; line-height: 1.1; }
.panel, .card, .auth-card, .stats article, .course-card, .empty-state {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
}
.premium-card, .training-card, .faq-item {
    background: var(--surface);
    border: 1px solid rgba(215,222,232,.9);
    border-radius: var(--radius);
    box-shadow: 0 18px 45px rgba(17,24,39,.08);
}
.home-hero {
    min-height: 620px;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
    gap: 56px;
    align-items: center;
    padding: 72px 0 48px;
}
.hero-copy h1 {
    max-width: 720px;
    margin: 0;
    color: #0f172a;
    font-size: clamp(48px, 7vw, 82px);
    line-height: .98;
    letter-spacing: 0;
}
.hero-subtitle {
    max-width: 690px;
    margin: 24px 0 0;
    color: var(--ink-2);
    font-size: 20px;
    line-height: 1.75;
}
.hero-visual {
    margin: 0;
    padding: 16px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, #ffffff, #f8fbff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.hero-visual img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 7px;
}
.equal-grid { align-items: stretch; }
.journey-card { display: grid; gap: 18px; padding: 34px; }
.journey-card h3 { margin: 0; color: #0f172a; font-size: 30px; }
.clean-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.clean-list li { display: flex; align-items: center; gap: 10px; color: var(--ink-2); font-weight: 750; }
.clean-list li::before { content: ""; width: 8px; height: 8px; border-radius: 999px; background: var(--primary); flex: 0 0 auto; }
.featured-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.training-card { display: grid; overflow: hidden; }
.training-image {
    min-height: 150px;
    display: grid;
    place-items: center;
    background:
        linear-gradient(135deg, rgba(21,94,239,.95), rgba(14,147,132,.76)),
        radial-gradient(circle at 70% 25%, rgba(255,255,255,.7), transparent 30%);
    color: #fff;
    font-size: 34px;
    font-weight: 900;
}
.training-body { display: grid; gap: 12px; padding: 22px; }
.training-body h3 { margin: 0; color: #0f172a; font-size: 21px; line-height: 1.2; }
.training-body .meta-row { color: var(--muted); font-weight: 750; justify-content: flex-start; }
.premium-card { padding: 28px; }
.premium-card h3 { margin: 0 0 10px; color: #0f172a; font-size: 22px; }
.premium-card p { margin: 0; color: var(--ink-2); }
.icon-mark { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; margin-bottom: 18px; border-radius: 8px; background: #eaf1ff; color: var(--primary-dark); font-weight: 900; }
.timeline-section { padding: 42px; border-radius: var(--radius); background: #f8fafc; border: 1px solid var(--line); }
.timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.timeline-step { position: relative; display: grid; gap: 10px; padding: 22px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.timeline-step span { color: var(--primary); font-weight: 900; }
.timeline-step strong { color: #0f172a; font-size: 20px; }
.faq-section { display: grid; grid-template-columns: minmax(260px, .45fr) minmax(0, 1fr); gap: 34px; align-items: start; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 0; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 18px 20px; color: #0f172a; font-weight: 850; }
.faq-item p { margin: 0; padding: 0 20px 20px; color: var(--ink-2); }
.empty-state { color: var(--muted); }
.certificate-card { display: grid; gap: 10px; }
.course-card { display: grid; gap: 12px; min-height: 100%; }
.course-card img, .hero-media { width: 100%; height: auto; border-radius: 7px; object-fit: cover; }
.hero-media { max-height: 360px; margin-bottom: 18px; }
.page-content { overflow-wrap: anywhere; }
.course-thumb { min-height: 150px; border-radius: 7px; background: linear-gradient(135deg, #dbeafe, #ccfbf1); display: grid; place-items: center; color: var(--primary-dark); font-weight: 900; }
.price-row, .meta-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.breadcrumb { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.path-list { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.path-list span { display: inline-flex; align-items: center; min-height: 32px; padding: 0 10px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2); font-weight: 700; }
.path-list span + span::before { content: "/"; margin-right: 8px; color: var(--muted); font-weight: 500; }
.collection-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.badge { display: inline-flex; align-items: center; min-height: 26px; padding: 0 9px; border-radius: 999px; background: #eef4ff; color: var(--primary-dark); font-size: 12px; font-weight: 800; }
.badge.success { background: #ecfdf3; color: var(--success); }
.badge.warning { background: #fffaeb; color: var(--warning); }
.badge.danger { background: #fef3f2; color: var(--danger); }
.progress { width: 100%; height: 9px; border-radius: 999px; background: #e4eaf2; overflow: hidden; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-2)); }
.auth-wrap, .auth-card { width: min(520px, calc(100% - 32px)); margin: 48px auto; }
.auth-card.wide { width: min(880px, calc(100% - 32px)); }
form { display: grid; gap: 14px; }
label { display: grid; gap: 7px; font-weight: 800; }
input, select, textarea {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 10px 12px;
    font: inherit;
    color: var(--ink);
    background: #fff;
}
input::placeholder, textarea::placeholder { color: #98a2b3; }
textarea { resize: vertical; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.check input { width: auto; min-height: auto; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.filters { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 12px; align-items: end; }
.full { grid-column: 1 / -1; }
.alert { padding: 12px 14px; border-radius: 6px; margin-bottom: 16px; border: 1px solid; }
.alert.success { color: var(--success); background: #ecfdf3; border-color: #abefc6; }
.alert.error { color: var(--danger); background: #fef3f2; border-color: #fecdca; }
.muted { color: var(--muted); font-size: 14px; }
.status-ok { color: var(--success); font-weight: 800; }
.status-bad { color: var(--danger); font-weight: 800; }
.admin-shell {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr) auto;
    grid-template-areas:
        "sidebar main"
        "sidebar footer";
    min-height: 100vh;
    align-items: stretch;
}
.admin-sidebar {
    grid-area: sidebar;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 22px;
    background: #0f172a;
    color: #fff;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: auto;
}
.admin-sidebar a, .admin-sidebar .brand { color: #fff; }
.admin-sidebar a { display: block; padding: 9px 10px; border-radius: 6px; }
.admin-sidebar a:hover { background: rgba(255,255,255,.1); text-decoration: none; }
.admin-sidebar .muted { color: #aab8ca; padding: 8px 10px; }
.admin-sidebar form { display: block; margin: 8px 0 0; }
.admin-sidebar button { width: 100%; }
.admin-main {
    grid-area: main;
    min-width: 0;
    padding: 28px;
}
.admin-topbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 24px; }
.admin-topbar .inline-actions { justify-content: flex-end; margin-bottom: 0; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-bottom: 24px; }
.stats article { min-width: 0; }
.stats span { display: block; color: var(--muted); margin-bottom: 8px; }
.stats strong { font-size: 34px; }
.admin-shell > .site-footer {
    grid-area: footer;
    margin-top: 0;
    padding: 16px 28px;
}
.admin-shell > .site-footer p { margin: 0; }
.table-wrap { overflow: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 13px 14px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; vertical-align: top; }
th { background: #f8fafc; color: var(--ink-2); font-size: 13px; text-transform: uppercase; }
tbody tr:hover { background: #fbfdff; }
.table-empty { color: var(--muted); text-align: center; padding: 28px 14px; white-space: normal; }
.learning-shell { display: grid; grid-template-columns: 310px 1fr; gap: 22px; }
.learning-sidebar { position: sticky; top: 92px; align-self: start; }
.protected-player { position: relative; user-select: none; background: #0b1220; color: #fff; }
.protected-player video { width: 100%; max-height: 560px; background: #000; border-radius: 6px; }
.watermark { position: absolute; top: 18px; right: 18px; z-index: 2; padding: 7px 10px; border-radius: 6px; background: rgba(17,24,39,.76); color: #fff; font-weight: 800; pointer-events: none; }
@media (max-width: 980px) {
    .hero, .home-hero, .grid-2, .grid-3, .grid-4, .filters, .learning-shell, .stats-grid, .collection-list, .featured-grid, .timeline, .faq-section { grid-template-columns: 1fr; }
    .home-hero { min-height: auto; padding-top: 48px; }
    .admin-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto minmax(0, 1fr) auto;
        grid-template-areas:
            "sidebar"
            "main"
            "footer";
    }
    .admin-sidebar { position: static; height: auto; }
    .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
    .site-header, nav, .admin-topbar, .section-head { align-items: flex-start; flex-direction: column; }
    .site-header { padding: 18px; }
    .container { width: min(100% - 24px, var(--max)); margin-top: 20px; }
    .home-section { margin-top: 68px; }
    .hero-copy h1 { font-size: 44px; }
    .hero-subtitle { font-size: 18px; }
    .journey-card, .premium-card, .timeline-section { padding: 22px; }
    .hero { padding: 30px; min-height: 340px; }
    .form-grid, .stats { grid-template-columns: 1fr; }
    .admin-main { padding: 18px; }
    .admin-shell > .site-footer { padding: 16px 18px; }
    .footer-grid { grid-template-columns: 1fr; }
    th, td { white-space: normal; }
}