:root {
  --bg: #0b1220;
  --panel: #0f1b33;
  --card: #0f243f;
  --text: #e8eefc;
  --muted: #a7b4d6;
  --accent: #20c997;
  --border: rgba(255,255,255,0.08);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--text); background: radial-gradient(1200px 700px at 20% 0%, rgba(32,201,151,0.14), transparent 60%), var(--bg); }

code { background: rgba(255,255,255,0.08); padding: 2px 6px; border-radius: 6px; }

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: 420px; max-width: 100%; background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03)); border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: 0 20px 70px rgba(0,0,0,0.45); backdrop-filter: blur(8px); }
.login-title { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.login-hint { margin: 10px 0; color: #ffd43b; font-size: 13px; }
.field { display: grid; gap: 6px; margin: 12px 0; }
.field span { font-size: 12px; color: var(--muted); }
.field input { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: rgba(0,0,0,0.2); color: var(--text); outline: none; }
.btn-primary { width: 100%; padding: 10px 12px; border-radius: 10px; border: 0; background: linear-gradient(90deg, var(--accent), #4dabf7); color: #041016; font-weight: 700; cursor: pointer; margin-top: 10px; }
.login-footnote { margin-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.6; }

.admin-page { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { padding: 18px; border-right: 1px solid var(--border); background: linear-gradient(180deg, rgba(255,255,255,0.04), transparent); }
.brand { font-weight: 800; letter-spacing: 0.4px; margin-bottom: 18px; }
.nav { display: grid; gap: 8px; }
.nav a { text-decoration: none; color: var(--text); padding: 10px 12px; border-radius: 10px; border: 1px solid transparent; background: rgba(255,255,255,0.03); }
.nav a:hover { border-color: var(--border); background: rgba(255,255,255,0.05); }
.logout { margin-top: 16px; }
.logout button { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: rgba(255,255,255,0.02); color: var(--text); cursor: pointer; }

.content { padding: 24px; }
h1 { margin: 0 0 14px 0; font-size: 22px; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.card { border: 1px solid var(--border); border-radius: 14px; padding: 16px; background: rgba(255,255,255,0.03); }
.card-title { font-weight: 800; margin-bottom: 6px; }
.card-desc { color: var(--muted); font-size: 13px; line-height: 1.5; margin-bottom: 12px; }
.btn { display: inline-block; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border); text-decoration: none; color: var(--text); background: rgba(255,255,255,0.03); }
.btn:hover { background: rgba(255,255,255,0.06); }

@media (max-width: 900px) {
  .admin-page { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
  .cards { grid-template-columns: 1fr; }
}