:root {
  --bg0: #0b1c24;
  --bg1: #123040;
  --bg2: #1a3d4f;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-solid: #143644;
  --line: rgba(255, 246, 230, 0.12);
  --text: #f4f0e6;
  --muted: #9db4bf;
  --accent: #e8a054;
  --accent-2: #3ecfb2;
  --danger: #e36a6a;
  --ok: #5dcf8a;
  --warn: #e8c35a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --font: "Outfit", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(62, 207, 178, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(232, 160, 84, 0.16), transparent 50%),
    linear-gradient(160deg, var(--bg0), var(--bg1) 45%, #0e2732);
  background-attachment: fixed;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: var(--accent); }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex; align-items: center; gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  background: rgba(8, 24, 32, 0.72);
  position: sticky; top: 0; z-index: 50;
}
.brand { display: flex; align-items: center; gap: 0.6rem; min-width: 180px; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 2.2rem; height: 2.2rem; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #f0c27a);
  color: #1a1208; font-weight: 700; font-size: 0.85rem;
}
.brand-name { font-weight: 600; letter-spacing: 0.02em; font-size: 0.95rem; }
.nav { display: flex; flex-wrap: wrap; gap: 0.35rem; flex: 1; }
.nav a {
  color: var(--muted); padding: 0.45rem 0.75rem; border-radius: 999px;
  transition: 0.2s ease;
}
.nav a:hover, .nav a.active { color: var(--text); background: var(--panel); }
.userbox { display: flex; align-items: center; gap: 0.75rem; }
.user-meta { display: flex; flex-direction: column; align-items: flex-end; font-size: 0.9rem; }
.user-meta small { color: var(--muted); font-size: 0.75rem; }

.main { width: min(1200px, calc(100% - 2rem)); margin: 1.25rem auto 2.5rem; flex: 1; }
.main-auth { display: grid; place-items: center; width: min(440px, calc(100% - 2rem)); }

.page-head {
  display: flex; justify-content: space-between; align-items: end;
  gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap;
}
.page-head h1 { margin: 0; font-size: 1.7rem; font-weight: 650; letter-spacing: -0.02em; }
.page-head p { margin: 0.35rem 0 0; color: var(--muted); }

.grid { display: grid; gap: 1rem; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) {
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .topbar { flex-wrap: wrap; }
  .nav { order: 3; width: 100%; }
}
@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.stat, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat { padding: 1.1rem 1.2rem; }
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value { font-size: 1.8rem; font-weight: 700; margin-top: 0.25rem; }
.stat .hint { color: var(--muted); font-size: 0.78rem; margin-top: 0.35rem; }

.panel { padding: 1.15rem 1.25rem; }
.panel h2 { margin: 0 0 0.85rem; font-size: 1.05rem; font-weight: 600; }

.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.7rem 0.55rem; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; }
tr:hover td { background: rgba(255,255,255,0.03); }

.badge {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.15rem 0.55rem; border-radius: 999px; font-size: 0.75rem;
  border: 1px solid var(--line);
}
.badge-ok { color: var(--ok); background: rgba(93, 207, 138, 0.12); }
.badge-off { color: var(--muted); background: rgba(255,255,255,0.05); }
.badge-warn { color: var(--warn); background: rgba(232, 195, 90, 0.12); }
.badge-danger { color: var(--danger); background: rgba(227, 106, 106, 0.12); }

.btn {
  appearance: none; border: 0; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.55rem 1rem; border-radius: 12px;
  font: inherit; font-weight: 600; font-size: 0.9rem;
  background: linear-gradient(135deg, var(--accent), #f0c27a);
  color: #1a1208; transition: transform 0.15s ease, filter 0.15s ease;
}
.btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--panel); filter: none; }
.btn-danger { background: linear-gradient(135deg, #d45757, #e36a6a); color: #fff; }
.btn-teal { background: linear-gradient(135deg, #2bb89e, var(--accent-2)); color: #06241e; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.8rem; border-radius: 10px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.45rem; }

.form { display: grid; gap: 0.85rem; }
.form label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.85rem; }
.form input, .form select, .form textarea {
  width: 100%; padding: 0.7rem 0.85rem; border-radius: 12px;
  border: 1px solid var(--line); background: rgba(0,0,0,0.25);
  color: var(--text); font: inherit;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: 2px solid rgba(62, 207, 178, 0.35); border-color: var(--accent-2);
}
.form-actions { display: flex; gap: 0.6rem; margin-top: 0.25rem; }
.alert {
  padding: 0.75rem 0.9rem; border-radius: 12px; margin-bottom: 1rem;
  border: 1px solid var(--line);
}
.alert-error { background: rgba(227,106,106,0.12); color: #ffc9c9; }
.alert-ok { background: rgba(93,207,138,0.12); color: #c8f0d7; }

.auth-card {
  width: 100%; padding: 2rem 1.6rem;
  background: rgba(16, 42, 54, 0.88);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  animation: rise 0.55s ease both;
}
.auth-card h1 { margin: 0 0 0.35rem; font-size: 1.6rem; }
.auth-card .sub { color: var(--muted); margin: 0 0 1.4rem; }
.auth-mark {
  width: 3rem; height: 3rem; border-radius: 14px; margin-bottom: 1rem;
  display: grid; place-items: center; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #f0c27a); color: #1a1208;
}

.map-box {
  height: min(68vh, 620px); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: #0a1820;
}
.device-card {
  padding: 1rem 1.1rem; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line);
  display: grid; gap: 0.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.device-card:hover { transform: translateY(-2px); border-color: rgba(62,207,178,0.35); }
.device-card h3 { margin: 0; font-size: 1.05rem; }
.meta-row { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; color: var(--muted); font-size: 0.85rem; }
.meta-row strong { color: var(--text); font-weight: 600; }
.coords { font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

.empty {
  text-align: center; padding: 2.5rem 1rem; color: var(--muted);
  border: 1px dashed var(--line); border-radius: var(--radius);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.rise { animation: rise 0.45s ease both; }

.leaflet-container { background: #0a1820; font-family: var(--font); }
.switch {
  display: inline-flex; align-items: center; gap: 0.45rem; cursor: pointer;
}
.switch input { accent-color: var(--accent-2); width: 1.1rem; height: 1.1rem; }