:root {
  --bg: #0b1020;
  --bg-2: #0d1430;
  --card: rgba(255,255,255,.04);
  --soft: #1a244d;
  --accent: #4f8cff;
  --accent-2: #6fd3ff;
  --text: #eaf0ff;
  --muted: #b8c2e0;
  --border: rgba(255,255,255,.1);
  --ok: #27c281;
  --warn: #ffc857;
  --danger: #ff6b6b;
  --shadow: 0 20px 40px rgba(0,0,0,.25);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, #09101f 0%, #0d1430 100%);
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 23, 0.78);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  min-height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .3px; }
.brand-badge {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; color: white; font-weight: 900;
  box-shadow: var(--shadow);
}
.nav-links, .nav-actions, .action-row {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
}
.nav-links a, .footer-links a, .support-links a, .muted-link { color: var(--muted); }
.nav-links a:hover, .footer-links a:hover, .support-links a:hover, .muted-link:hover { color: var(--text); }
.hero { padding: 72px 0 36px; }
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; align-items: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(79, 140, 255, 0.12);
  color: #d9e7ff; border: 1px solid rgba(79, 140, 255, 0.3);
  padding: 8px 12px; border-radius: 999px; font-size: .95rem;
}
.hero h1, .page-hero h1 { font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.06; margin: 14px 0 16px; }
.page-hero { padding: 54px 0 16px; }
.page-hero h1 { font-size: clamp(2rem, 3vw, 3rem); margin-bottom: 10px; }
.hero p, .lead, .muted { color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 24px; padding: 24px; box-shadow: var(--shadow);
}
.card-compact { padding: 18px; border-radius: 20px; }
.grid-4, .grid-3, .grid-2, .grid-sidebar, .form-grid {
  display: grid; gap: 18px;
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-sidebar { grid-template-columns: 280px 1fr; }
.form-grid { grid-template-columns: repeat(2, 1fr); }
.section { padding: 28px 0 16px; }
.section h2 { font-size: clamp(1.6rem, 2vw, 2.2rem); margin: 0 0 8px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 14px; padding: 12px 18px;
  font-weight: 700; cursor: pointer; transition: .2s ease;
  min-height: 46px;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; }
.btn-secondary { background: rgba(255,255,255,.05); border-color: var(--border); color: var(--text); }
.btn-danger { background: rgba(255,107,107,.12); color: #ffd5d5; border-color: rgba(255,107,107,.26); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--muted); }
.pill, .tag, .status-pill {
  display: inline-flex; width: fit-content; align-items: center; gap: 8px;
  border-radius: 999px; padding: 6px 12px; font-size: .85rem; font-weight: 700;
}
.tag, .status-pill.ok { background: rgba(39,194,129,.14); color: #8ef0c1; border: 1px solid rgba(39,194,129,.22); }
.pill.warn, .status-pill.warn { background: rgba(255,200,87,.12); color: #ffe2a1; border: 1px solid rgba(255,200,87,.22); }
.pill.info { background: rgba(79,140,255,.12); color: #d9e7ff; border: 1px solid rgba(79,140,255,.22); }
.pill.danger { background: rgba(255,107,107,.12); color: #ffd5d5; border: 1px solid rgba(255,107,107,.22); }
.price { font-size: 1.4rem; font-weight: 800; }
.input, textarea, input[type="file"], select {
  width: 100%; background: rgba(255,255,255,.05); border: 1px solid var(--border);
  border-radius: 14px; color: var(--text); padding: 14px 16px;
}
textarea { min-height: 120px; resize: vertical; }
.label { display: grid; gap: 8px; color: var(--muted); font-size: .95rem; }
.small { font-size: .94rem; color: var(--muted); }
.tiny { font-size: .84rem; color: var(--muted); }
hr.sep { border: 0; height: 1px; background: var(--border); margin: 18px 0; }
.footer {
  margin-top: 40px; padding: 40px 0 24px; border-top: 1px solid var(--border);
  background: rgba(4, 8, 18, .45);
}
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr .8fr; gap: 24px; }
.footer-links, .support-links, .stack { display: grid; gap: 10px; }
.note { border-left: 4px solid var(--accent); padding-left: 14px; color: var(--muted); }
.notice {
  border: 1px dashed rgba(255,255,255,.22); border-radius: 18px; padding: 20px; color: var(--muted);
}
.hidden { display: none !important; }
.auth-shell { min-height: calc(100vh - 240px); display: grid; align-items: center; padding: 30px 0 60px; }
.metric {
  background: rgba(255,255,255,.03); border: 1px solid var(--border); border-radius: 20px; padding: 16px;
}
.metric strong { display: block; font-size: 1.6rem; }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 700; }
.quiz-question { display: grid; gap: 14px; }
.option-list { display: grid; gap: 10px; }
.option-item {
  display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 16px; background: rgba(255,255,255,.03);
}
.option-item input { margin-top: 5px; }
.sidebar-menu { display: grid; gap: 10px; position: sticky; top: 92px; }
.sidebar-menu .btn { justify-content: flex-start; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; }
.center { text-align: center; }
.right { text-align: right; }
.file-drop {
  border: 1px dashed rgba(255,255,255,.24); border-radius: 16px; padding: 14px;
  background: rgba(255,255,255,.02);
}
@media (max-width: 1000px) {
  .hero-grid, .footer-grid, .grid-4, .grid-3, .grid-2, .grid-sidebar, .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .nav { padding: 12px 0; align-items: flex-start; }
  .nav, .nav-links, .nav-actions { flex-direction: column; align-items: flex-start; }
  .sidebar-menu { position: static; }
}