:root {
  color-scheme: dark;
  --bg: #0a0d12;
  --panel: #131924;
  --panel-soft: #1a2230;
  --border: rgba(255,255,255,0.08);
  --text: #f4f7fb;
  --muted: #9db0c7;
  --accent: #61dafb;
  --danger: #ff6b6b;
  --success: #35d07f;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, sans-serif; background: radial-gradient(circle at top, #182335 0%, var(--bg) 50%); color: var(--text); }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.app-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { padding: 24px; border-right: 1px solid var(--border); background: rgba(7,10,16,0.72); backdrop-filter: blur(14px); }
.sidebar nav { display: grid; gap: 10px; margin-top: 24px; }
.sidebar a { padding: 12px 14px; border-radius: 16px; color: var(--muted); }
.sidebar a.active, .sidebar a:hover { background: var(--panel); color: var(--text); }
.brand { font-weight: 800; letter-spacing: 0.08em; }
.content { padding: 32px; }
.card { background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border: 1px solid var(--border); border-radius: 24px; padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,0.25); }
.hero { display: flex; justify-content: space-between; gap: 24px; align-items: end; }
.grid { display: grid; gap: 20px; margin-top: 20px; }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stack, .stack-lg { display: grid; gap: 14px; }
.stack-lg { gap: 20px; }
.button { border: 0; background: linear-gradient(135deg, #5ac8fa, #7b7bff); color: white; padding: 12px 18px; border-radius: 16px; cursor: pointer; font-weight: 700; }
.button.ghost { background: transparent; border: 1px solid var(--border); }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; }
h1, h2, h3, p { margin-top: 0; }
.stat { display: grid; gap: 8px; }
.stat span { color: var(--muted); }
.stat strong { font-size: 28px; }
.package { padding: 18px; border-radius: 20px; border: 1px solid var(--border); background: var(--panel-soft); }
.price { margin: 14px 0; font-size: 24px; font-weight: 800; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
input, select { width: 100%; background: #0f1520; color: var(--text); border: 1px solid var(--border); border-radius: 14px; padding: 12px 14px; }
.notice { padding: 12px 14px; border-radius: 14px; margin-top: 12px; }
.notice.error { background: rgba(255,107,107,0.12); color: #ffd7d7; border: 1px solid rgba(255,107,107,0.35); }
.notice.success { background: rgba(53,208,127,0.12); color: #dbffea; border: 1px solid rgba(53,208,127,0.35); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 10px; border-bottom: 1px solid var(--border); }
.hidden { display:none; }
.actions { display:flex; gap:12px; flex-wrap:wrap; }
.section-head { display:flex; justify-content:space-between; align-items:end; gap:20px; }
@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
  .hero, .cols-2, .cols-3, .cols-4, .form-row { grid-template-columns: 1fr; display: grid; }
}