:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #243044;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

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

header {
  background: var(--surface);
  border-bottom: 1px solid var(--surface2);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header h1 { font-size: 1.2rem; font-weight: 600; }

main { padding: 1.25rem; max-width: 1100px; margin: 0 auto; }

.card {
  background: var(--surface);
  border: 1px solid var(--surface2);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card h2 { font-size: 1.05rem; margin-bottom: 0.85rem; }

label {
  display: block;
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--surface2);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
}

.btn:hover { background: var(--accent-hover); }
.btn.secondary { background: var(--surface2); color: var(--text); }
.btn.danger { background: var(--danger); }
.btn.success { background: var(--success); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.on { background: rgba(34,197,94,0.2); color: var(--success); }
.badge.off { background: rgba(239,68,68,0.18); color: var(--danger); }
.badge.warn { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge.muted { background: var(--surface2); color: var(--muted); }

.msg {
  display: none;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.msg.show { display: block; }
.msg.ok { background: rgba(34,197,94,0.15); color: var(--success); }
.msg.err { background: rgba(239,68,68,0.15); color: var(--danger); }

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}

.device-card {
  background: var(--bg);
  border: 1px solid var(--surface2);
  border-radius: 10px;
  padding: 1rem;
  cursor: pointer;
  transition: border-color 0.15s;
}
.device-card:hover { border-color: var(--accent); }
.device-card h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.device-meta { color: var(--muted); font-size: 0.8rem; }
.device-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
}
.device-stats .label { color: var(--muted); font-size: 0.75rem; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.login-card { width: 100%; max-width: 24rem; }

.hidden { display: none !important; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.stat {
  background: var(--bg);
  border-radius: 8px;
  padding: 0.75rem;
}
.stat .value { font-size: 1.25rem; font-weight: 600; }
.stat .label { color: var(--muted); font-size: 0.75rem; }

.schedule-slot {
  padding: 0.75rem;
  margin-bottom: 0.6rem;
  border: 1px solid var(--surface2);
  border-radius: 8px;
  background: var(--bg);
}
.schedule-time-row {
  display: flex;
  gap: 0.75rem;
  width: 100%;
}
.schedule-time-group {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 0.35rem;
}
.schedule-time-group input {
  flex: 1;
  margin-bottom: 0;
  text-align: center;
}
.schedule-time-label { color: var(--muted); font-size: 0.8rem; }

.token-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  word-break: break-all;
  background: var(--bg);
  border: 1px solid var(--surface2);
  border-radius: 8px;
  padding: 0.75rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}