:root {
  --bg: #eef2fb;
  --bg-2: #ffffff;
  --surface: rgba(255, 255, 255, 0.7);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --border: rgba(20, 30, 60, 0.12);
  --text: #16203a;
  --text-dim: #5b6b8c;
  --accent: #3b6cff;
  --accent-2: #7a3bff;
  --good: #12a87a;
  --warn: #d98324;
  --bad: #e23d57;
  --radius: 18px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --fs-base: 17px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

/* 长提示撑高页面会触发纵向滚动条；预留滚动条槽位，避免滚动条显隐导致内容左右抖动 */
html { scrollbar-gutter: stable; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

/* Aurora animated background */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 15% 10%, rgba(91, 140, 255, 0.35), transparent 60%),
    radial-gradient(55% 45% at 85% 20%, rgba(138, 91, 255, 0.30), transparent 60%),
    radial-gradient(50% 50% at 50% 95%, rgba(56, 211, 159, 0.20), transparent 60%),
    linear-gradient(160deg, var(--bg), var(--bg-2));
  filter: saturate(1.1);
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift {
  0% { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(-2%, 1%, 0) scale(1.05); }
}

/* Glass card */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

/* Top nav */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}
.brand {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 12px;
  font-weight: 600;
  transition: all 0.2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--surface-strong); }
.nav-right { display: flex; align-items: center; gap: 10px; }

/* Layout */
.container { max-width: 1180px; margin: 0 auto; padding: 28px; }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; } }

.card { padding: 22px; }
.card h2, .card h3 { margin-top: 0; }

/* Stat tiles */
.stat .num { font-size: 34px; font-weight: 800; }
.stat .label { color: var(--text-dim); font-size: 14px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface-strong); color: var(--text); font-weight: 700;
  font-size: 15px; cursor: pointer; text-decoration: none;
  transition: transform 0.18s cubic-bezier(0.16,1,0.3,1), box-shadow 0.18s;
}
.btn:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 8px 24px rgba(91,140,255,0.3); }
.btn-primary { background: linear-gradient(90deg, var(--accent), var(--accent-2)); border: none; color: #fff; }
.btn-sm { padding: 7px 13px; font-size: 13px; }

/* Magnetic helper */
.magnetic { transition: transform 0.2s cubic-bezier(0.16,1,0.3,1); }

/* Inputs */
input, select, textarea {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 16px; font-family: var(--font);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); }
label { display: block; margin: 14px 0 6px; font-weight: 600; color: var(--text-dim); }

/* Tables */
table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 15px; }
th { color: var(--text-dim); font-weight: 700; }
tr:hover td { background: var(--surface); }
.mono { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 14px; }

/* Badges */
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge-accent { background: rgba(91,140,255,0.2); color: var(--accent); }
.badge-good { background: rgba(56,211,159,0.2); color: var(--good); }
.badge-warn { background: rgba(255,180,84,0.2); color: var(--warn); }

/* Flash messages */
.flash { padding: 12px 16px; border-radius: 12px; margin-bottom: 14px; font-weight: 600; }
.flash-success { background: rgba(56,211,159,0.18); color: var(--good); }
.flash-error { background: rgba(255,107,129,0.18); color: var(--bad); }
.flash-info { background: rgba(91,140,255,0.18); color: var(--accent); }
.flash-warning { background: rgba(255,180,84,0.18); color: var(--warn); }

/* Theme toggle */

.section-title { display: flex; align-items: center; gap: 10px; margin: 8px 0 18px; }
.section-title .bar { width: 5px; height: 26px; border-radius: 3px; background: linear-gradient(var(--accent), var(--accent-2)); }

.svg-box { width: 100%; background: #fff; border-radius: 12px; padding: 10px; overflow: auto; }
.svg-box svg { max-width: 100%; height: auto; }

.hero { padding: 40px 0 10px; }
.hero h1 { font-size: 40px; margin: 0 0 8px; font-weight: 800; }
.hero p { color: var(--text-dim); font-size: 18px; margin: 0; }

.quick { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.quick .field { flex: 1; min-width: 160px; }