:root {
  --bg0: #f4f6fb;
  --bg1: #ffffff;
  --card: rgba(255, 255, 255, 0.82);
  --card-solid: #ffffff;
  --border: rgba(99, 120, 255, 0.16);
  --border-strong: rgba(99, 120, 255, 0.32);
  --text: #1a1f36;
  --muted: #6b7280;
  --primary: #4f5bd5;
  --primary-2: #7c3aed;
  --accent: #0891b2;
  --accent-2: #059669;
  --warn: #d97706;
  --danger: #dc2626;
  --shadow: 0 12px 40px rgba(30, 40, 90, 0.10);
  --glow: 0 0 30px rgba(79, 91, 213, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg0);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(79,91,213,0.10), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(8,145,178,0.08), transparent 60%),
    radial-gradient(700px 400px at 50% 110%, rgba(124,58,237,0.08), transparent 60%),
    linear-gradient(180deg, #f4f6fb 0%, #eef1f8 100%);
}
.bg-grid::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(79,91,213,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,91,213,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 85%);
  animation: gridMove 20s linear infinite;
}
@keyframes gridMove {
  0% { transform: translateY(0); }
  100% { transform: translateY(48px); }
}
.orb {
  position: fixed; border-radius: 50%; filter: blur(70px); z-index: -1; opacity: 0.35;
  animation: float 12s ease-in-out infinite;
}
.orb.o1 { width: 420px; height: 420px; background: #a5b4fc; top: -120px; left: -100px; }
.orb.o2 { width: 360px; height: 360px; background: #67e8f9; bottom: -120px; right: -80px; animation-delay: -4s; }
.orb.o3 { width: 280px; height: 280px; background: #c4b5fd; top: 40%; left: 60%; animation-delay: -8s; }
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(30px,-40px) scale(1.1); }
}

.app { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar {
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(18px);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 12px; padding: 8px 8px 16px;
  border-bottom: 1px solid var(--border);
}
.brand-logo {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; font-weight: 800; color: #fff;
  box-shadow: var(--glow);
}
.brand h1 { font-size: 15px; margin: 0; line-height: 1.3; color: var(--text); }
.brand small { color: var(--muted); font-size: 11px; }

.nav { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 12px;
  color: var(--muted); cursor: pointer; font-size: 14px; font-weight: 500;
  transition: all .2s ease; border: 1px solid transparent;
  user-select: none;
}
.nav-item:hover { color: var(--text); background: rgba(79,91,213,0.06); }
.nav-item.active {
  color: var(--primary);
  background: linear-gradient(90deg, rgba(79,91,213,0.12), rgba(8,145,178,0.06));
  border-color: var(--border-strong);
  box-shadow: inset 0 0 20px rgba(79,91,213,0.06);
}
.nav-item .icon { width: 18px; text-align: center; opacity: 0.9; }

.sidebar-footer {
  margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
}
.status-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2);
  margin-right: 6px; animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.main { padding: 28px 32px 40px; }
.view { display: none; animation: fadeIn .35s ease; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.page-header { margin-bottom: 24px; }
.page-header h2 { font-size: 26px; margin: 0 0 6px; font-weight: 700; letter-spacing: -0.5px; color: var(--text); }
.page-header p { color: var(--muted); margin: 0; font-size: 14px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 20px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.5), transparent 40%);
}
.card h3 {
  margin: 0 0 14px; font-size: 16px; font-weight: 600;
  display: flex; align-items: center; gap: 8px; color: var(--text);
}
.card h3 .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 10px var(--primary);
}

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: 1fr 1fr; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .grid.cols-4 { grid-template-columns: repeat(2,1fr); } .grid.cols-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) { .app { grid-template-columns: 1fr; } .sidebar { position: relative; height: auto; } .grid.cols-2,.grid.cols-3,.grid.cols-4 { grid-template-columns: 1fr; } }

.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 10px 0; }
label { font-size: 13px; color: var(--muted); font-weight: 500; }
input, select, textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: rgba(255,255,255,0.9);
  color: var(--text);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,91,213,0.18);
}
textarea { width: 100%; font-family: "JetBrains Mono", ui-monospace, monospace; min-height: 120px; }

.btn {
  padding: 9px 18px;
  border: 1px solid var(--border);
  background: rgba(79,91,213,0.06);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px; font-weight: 500;
  transition: all .2s ease;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn:hover { border-color: var(--primary); transform: translateY(-1px); }
.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; border-color: transparent;
  box-shadow: 0 8px 24px rgba(79,91,213,0.30);
}
.btn.primary:hover { filter: brightness(1.05); box-shadow: 0 10px 30px rgba(79,91,213,0.45); }
.btn.ghost { background: transparent; }
.btn.accent { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; }
.btn.danger { background: rgba(220,38,38,0.08); color: var(--danger); border-color: rgba(220,38,38,0.25); }
.btn.sm { padding: 6px 12px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.stat {
  background: linear-gradient(135deg, rgba(79,91,213,0.06), rgba(8,145,178,0.04));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: transform .2s;
}
.stat:hover { transform: translateY(-2px); }
.stat .label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.8px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .sub { font-size: 11px; color: var(--muted); margin-top: 2px; }

.chart-box {
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
}
.chart-box h4 { font-size: 13px; margin: 0 0 10px; color: var(--muted); font-weight: 500; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border-bottom: 1px solid var(--border); padding: 8px 10px; text-align: left; color: var(--text); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; }
tr:hover td { background: rgba(79,91,213,0.04); }

.pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: rgba(79,91,213,0.10); color: var(--primary); border: 1px solid var(--border);
}
.pill.green { background: rgba(5,150,105,0.10); color: var(--accent-2); border-color: rgba(5,150,105,0.25); }
.pill.cyan { background: rgba(8,145,178,0.10); color: var(--accent); border-color: rgba(8,145,178,0.25); }
.pill.amber { background: rgba(217,119,6,0.10); color: var(--warn); border-color: rgba(217,119,6,0.25); }

.progress { height: 6px; background: rgba(0,0,0,0.06); border-radius: 999px; overflow: hidden; }
.progress > div { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); transition: width .4s; }

.log {
  background: rgba(244,246,251,0.9); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px; font-family: monospace; font-size: 12px;
  max-height: 260px; overflow: auto; color: #3730a3;
}
.log .line { padding: 2px 0; border-bottom: 1px dashed rgba(0,0,0,0.05); }
.log .ts { color: var(--muted); }

.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast {
  background: rgba(255,255,255,0.95); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); padding: 12px 16px; min-width: 240px;
  box-shadow: var(--shadow); backdrop-filter: blur(12px);
  animation: slideIn .3s ease; font-size: 13px; color: var(--text);
}
.toast.success { border-left: 3px solid var(--accent-2); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--primary); }
@keyframes slideIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: none; } }

.spinner {
  width: 18px; height: 18px; border: 2px solid rgba(0,0,0,0.15);
  border-top-color: var(--primary); border-radius: 50%;
  animation: spin .7s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

pre {
  background: rgba(244,246,251,0.9); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px; overflow: auto;
  font-size: 12px; font-family: monospace; color: #3730a3;
  max-height: 320px;
}

.heatmap { display: grid; gap: 2px; }
.heatmap .cell { aspect-ratio: 1; border-radius: 4px; min-width: 28px; display: grid; place-items: center; font-size: 10px; color: #fff; }

.muted { color: var(--muted); font-size: 13px; }
.divider { height: 1px; background: var(--border); margin: 16px 0; }
.kbd { background: rgba(0,0,0,0.05); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; font-size: 11px; font-family: monospace; }

.dropzone {
  border: 2px dashed var(--border-strong); border-radius: var(--radius);
  padding: 30px; text-align: center; color: var(--muted);
  transition: all .2s; cursor: pointer; background: rgba(255,255,255,0.5);
}
.dropzone:hover, .dropzone.drag { border-color: var(--primary); background: rgba(79,91,213,0.06); color: var(--text); }

.footer { color: var(--muted); font-size: 12px; text-align: center; padding: 20px; }

input[type=number] { width: 90px; }
input[type=range] { width: 160px; accent-color: var(--primary); }