:root {
  --bg: #0b1220;
  --bg2: #121a2b;
  --panel: #162033;
  --line: #2a3a55;
  --text: #e8eef8;
  --muted: #9aabc4;
  --accent: #2ec4b6;
  --accent2: #f0a202;
  --danger: #ef476f;
  --ok: #06d6a0;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", "Consolas", "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a3a4a 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #2a1f3d 0%, transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg2) 40%, #0a101a);
  min-height: 100vh;
}

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

.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0; border-bottom: 1px solid rgba(42,58,85,.6);
}
.brand { font-size: 1.25rem; font-weight: 700; letter-spacing: .02em; color: var(--text); }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: .95rem; }
.nav-links a:hover { color: var(--text); }

.hero {
  padding: 64px 0 48px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 36px;
  align-items: center;
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 36px; }
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 16px;
  font-weight: 750;
}
.hero p { color: var(--muted); font-size: 1.05rem; line-height: 1.7; margin: 0 0 28px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid transparent; border-radius: 10px;
  padding: 12px 18px; font-weight: 650; cursor: pointer;
  background: var(--accent); color: #04221f; font-size: .95rem;
}
.btn:hover { filter: brightness(1.05); text-decoration: none; }
.btn.secondary { background: transparent; border-color: var(--line); color: var(--text); }
.btn.warn { background: var(--accent2); color: #1a1200; }
.btn.danger { background: var(--danger); color: white; }

.panel {
  background: rgba(22,32,51,.88);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.panel h3 { margin: 0 0 12px; }
.price-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.price-row:last-child { border-bottom: 0; }
.muted { color: var(--muted); }
.section { padding: 28px 0 56px; }
.section h2 { margin: 0 0 8px; font-size: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr; } }
.card {
  background: rgba(22,32,51,.7);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); line-height: 1.6; font-size: .95rem; }

label { display: block; margin: 14px 0 6px; color: var(--muted); font-size: .9rem; }
input, select, textarea {
  width: 100%; padding: 11px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: #0d1524; color: var(--text);
  font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
.form-actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
.alert {
  padding: 12px 14px; border-radius: 10px; margin: 14px 0;
  border: 1px solid var(--line); background: #101929;
}
.alert.error { border-color: rgba(239,71,111,.5); color: #ffb3c3; }
.alert.ok { border-color: rgba(6,214,160,.45); color: #9af0d4; }
.mono { font-family: var(--mono); word-break: break-all; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: .75rem; border: 1px solid var(--line); color: var(--muted);
}
.badge.pending { color: var(--accent2); border-color: rgba(240,162,2,.4); }
.badge.awaiting_confirm { color: #7ec8ff; border-color: rgba(126,200,255,.4); }
.badge.paid, .badge.active { color: var(--ok); border-color: rgba(6,214,160,.4); }
.badge.expired { color: var(--danger); border-color: rgba(239,71,111,.4); }
.badge.unused { color: #c4b5fd; border-color: rgba(196,181,253,.35); }

.footer { padding: 28px 0 48px; color: var(--muted); font-size: .9rem; border-top: 1px solid rgba(42,58,85,.5); }

/* admin */
.admin-shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
@media (max-width: 860px) { .admin-shell { grid-template-columns: 1fr; } }
.admin-side {
  background: #0d1524; border-right: 1px solid var(--line); padding: 22px 16px;
}
.admin-side .brand { display: block; margin-bottom: 24px; }
.admin-side a {
  display: block; padding: 10px 12px; border-radius: 8px; color: var(--muted); margin-bottom: 4px;
}
.admin-side a:hover, .admin-side a.active { background: #162033; color: var(--text); text-decoration: none; }
.admin-main { padding: 24px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 22px; }
@media (max-width: 980px) { .stats { grid-template-columns: 1fr 1fr; } }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.stat .n { font-size: 1.6rem; font-weight: 700; }
.stat .l { color: var(--muted); font-size: .85rem; }
.login-box { width: min(420px, calc(100% - 32px)); margin: 10vh auto; }