:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --danger: #ef4444;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: linear-gradient(135deg, #0b1020, #121a33);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.app-center {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  backdrop-filter: blur(8px);
}

.card__body { padding: 24px; }
.card__title { font-size: 20px; font-weight: 600; margin-bottom: 4px; }
.card__subtitle { font-size: 13px; color: var(--muted); margin-bottom: 18px; }

.form {
  display: grid;
  gap: 12px;
}
.form__group { display: grid; gap: 6px; }
.form__label { font-size: 13px; color: var(--muted); }
.form__input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0b1220;
  color: var(--text);
  outline: none;
}
.form__input:focus { border-color: #334155; box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }

.form__actions { margin-top: 6px; display: grid; gap: 10px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.error {
  display: none;
  padding: 8px 10px;
  border: 1px solid #7f1d1d;
  background: rgba(239, 68, 68, 0.12);
  color: #fecaca;
  border-radius: 10px;
  font-size: 13px;
}
.error.show { display: block; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.brand__logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #0ea5e9;
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
}
.brand__name { font-weight: 700; }

.muted { color: var(--muted); font-size: 12px; }

/* 顶部导航 */
.nav {
  width: 100%;
  background: rgba(2, 6, 23, 0.6);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.nav__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}
.nav__links { display: flex; gap: 10px; }
.nav__link {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
}
.nav__link.active { border-color: var(--border); background: #0b1220; }
.nav__right { display: flex; gap: 8px; }

/* 表格与栅格 */
.grid { display: grid; gap: 12px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 10px; }
.table th { text-align: left; color: var(--muted); font-weight: 500; }
.table__actions { display: flex; gap: 8px; }
.input-inline { width: 90px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; background:#0b1220; color: var(--text); }
.badge { display:inline-block; padding:2px 6px; border:1px solid var(--border); border-radius:6px; font-size:12px; color:var(--muted); }

/* 仪表盘统计与快捷入口 */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat { background: rgba(17,24,39,0.8); border:1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat__label { font-size:12px; color: var(--muted); }
.stat__value { font-size:22px; font-weight:700; margin-top:6px; }
.actions { display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 12px; }
.action {
  display:flex; align-items:center; justify-content:center; text-align:center;
  padding: 14px; border:1px solid var(--border); border-radius: 12px; background:#0b1220; color:var(--text); text-decoration:none; font-weight:600;
}
.action:hover { border-color:#334155; }