:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --panel2: #243044;
  --line: #2e3d52;
  --text: #e8eef6;
  --muted: #8fa3b8;
  --accent: #3d9cf0;
  --accent2: #2ecc9a;
  --danger: #e74c5e;
  --warn: #f0b429;
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1c2b44, transparent),
              radial-gradient(900px 500px at 100% 0%, #14261f, transparent),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-text-size-adjust: 100%;
}

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

.layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  background: rgba(26, 35, 50, 0.95);
  border-right: 1px solid var(--line);
  padding: 24px 16px;
  position: sticky; top: 0; height: 100vh;
}
.brand { font-size: 18px; font-weight: 700; margin-bottom: 28px; letter-spacing: 0.02em; }
.brand span { color: var(--accent2); }
.nav a {
  display: block; padding: 10px 12px; margin-bottom: 4px;
  border-radius: 8px; color: var(--text); text-decoration: none;
}
.nav a:hover, .nav a.active { background: var(--panel2); text-decoration: none; }
.nav .group { color: var(--muted); font-size: 12px; margin: 16px 12px 6px; text-transform: uppercase; }

.main { padding: 28px 32px 48px; min-width: 0; }
.page-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.page-title h1 { margin: 0; font-size: 24px; font-weight: 650; }
.muted { color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 24px; }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px;
}
.card .label { color: var(--muted); font-size: 13px; }
.card .value { font-size: 28px; font-weight: 700; margin-top: 6px; word-break: break-all; }

.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin-bottom: 18px;
}
.panel h2 { margin: 0 0 14px; font-size: 16px; }

.table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; white-space: nowrap; }
tr:hover td { background: rgba(255,255,255,0.02); }

.btn, button.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--panel2); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 14px; cursor: pointer; font-size: 14px;
  text-decoration: none; font-family: inherit; min-height: 40px;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: transparent; color: #fff; }
.btn-ok { background: var(--accent2); border-color: transparent; color: #0b1a14; }
.btn-danger { background: var(--danger); border-color: transparent; color: #fff; }
.btn-sm { padding: 6px 10px; font-size: 12px; min-height: 32px; }
.btn-block { width: 100%; }

.form label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 6px;
  background: #0d121a; border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 12px 14px; font-size: 16px; font-family: inherit;
}
.form textarea { min-height: 100px; resize: vertical; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form .check { display: flex; align-items: center; gap: 8px; color: var(--text); }
.form .check input { width: auto; margin: 0; }
fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin: 0 0 16px; }
legend { padding: 0 6px; color: var(--muted); }

.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.alert-error { background: rgba(231,76,94,0.15); border: 1px solid rgba(231,76,94,0.4); }
.alert-ok { background: rgba(46,204,154,0.12); border: 1px solid rgba(46,204,154,0.35); }
.alert-warn { background: rgba(240,180,41,0.12); border: 1px solid rgba(240,180,41,0.35); }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px;
  background: var(--panel2); color: var(--muted);
}
.badge-ok { background: rgba(46,204,154,0.2); color: #2ecc9a; }
.badge-warn { background: rgba(240,180,41,0.2); color: #f0b429; }
.badge-off { background: rgba(143,163,184,0.15); color: var(--muted); }
.badge-danger { background: rgba(231,76,94,0.2); color: #e74c5e; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; align-items: center; }
.toolbar .spacer { flex: 1; }

.login-body, .install-body, .register-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px;
}
.login-card, .install-card, .register-card {
  width: 100%; max-width: 480px; background: var(--panel);
  border: 1px solid var(--line); border-radius: 16px; padding: 24px;
}
.install-card { max-width: 560px; }
.install-card h1, .login-card h1, .register-card h1 { margin: 0 0 8px; font-size: 22px; }
.hidden { display: none !important; }
.code { font-family: ui-monospace, Consolas, monospace; letter-spacing: 0.15em; font-weight: 700; }
.link-mono {
  font-family: ui-monospace, Consolas, monospace; font-size: 12px;
  word-break: break-all; color: var(--accent2);
}

.mobile-bar {
  display: none; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.mobile-bar .brand { margin: 0; font-size: 16px; }
.menu-toggle {
  background: var(--panel2); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 8px 12px; font-size: 14px; cursor: pointer;
}
.export-box {
  background: #0d121a; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; max-height: 220px; overflow: auto; font-size: 12px;
  font-family: ui-monospace, Consolas, monospace; white-space: pre-wrap; word-break: break-all;
}
.success-code {
  text-align: center; font-size: 42px; letter-spacing: 0.35em;
  color: var(--accent2); margin: 16px 0; font-weight: 700;
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .mobile-bar { display: flex; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: min(82vw, 280px);
    height: 100vh; z-index: 30; transform: translateX(-105%);
    transition: transform .2s ease; box-shadow: 8px 0 24px rgba(0,0,0,.35);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .nav-backdrop {
    display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 25;
  }
  body.nav-open .nav-backdrop { display: block; }
  .form .row { grid-template-columns: 1fr; }
  .main { padding: 16px; }
  .page-title h1 { font-size: 20px; }
  .card .value { font-size: 22px; }
  table { min-width: 560px; font-size: 13px; }
  .btn, button.btn { width: auto; }
  .toolbar .btn { flex: 1 1 auto; }
}