:root {
  --bg: #0f172a; --card: #1e293b; --card2: #273449; --text: #e2e8f0; --muted: #94a3b8;
  --primary: #3b82f6; --primary-d: #2563eb; --warn: #f59e0b; --danger: #ef4444; --ok: #22c55e;
  --border: #334155; --radius: 14px;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f1f5f9; --card: #fff; --card2: #f8fafc; --text: #0f172a; --muted: #64748b; --border: #e2e8f0; }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--primary); }
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-size: 14px; min-height: 18px; }

/* Auth pages */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.auth-card { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 12px; }
.auth-card h1 { font-size: 22px; margin: 0 0 4px; }
.center { text-align: center; }

/* Layout */
.topbar { display: flex; align-items: center; gap: 16px; padding: 12px 16px; background: var(--card);
  border-bottom: 1px solid var(--border); flex-wrap: wrap; position: sticky; top: 0; z-index: 10; }
.brand { font-weight: 700; font-size: 18px; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tabs button { background: transparent; border: none; color: var(--muted); padding: 8px 14px; border-radius: 10px; cursor: pointer; font-size: 15px; }
.tabs button.active { background: var(--primary); color: #fff; }
main { max-width: 920px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; display: grid; gap: 12px; }
.card h2 { margin: 0; font-size: 18px; }
.card h3 { margin: 0; font-size: 16px; }

input, select, button, textarea { font-size: 15px; font-family: inherit; }
input, select, textarea { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--card2); color: var(--text); }
textarea { min-height: 70px; resize: vertical; }
label { display: grid; gap: 6px; font-size: 14px; }
.check { display: flex; flex-direction: row; align-items: center; gap: 8px; }
.check input { width: auto; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1; min-width: 140px; }

.btn { padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--card2); color: var(--text); cursor: pointer; }
.btn:hover { filter: brightness(1.1); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.warn { background: var(--warn); border-color: var(--warn); color: #000; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { background: transparent; }
.quick-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Device list */
.dev-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.dev { background: var(--card2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; cursor: pointer; display: grid; gap: 6px; }
.dev:hover { border-color: var(--primary); }
.dev.sel { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary) inset; }
.dev .ten { font-weight: 700; font-size: 16px; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; }
.dot.on { background: var(--ok); } .dot.off { background: var(--muted); }

.status-card { grid-template-columns: auto 1fr auto; align-items: center; display: grid; }
.status-dot { width: 18px; height: 18px; border-radius: 50%; background: var(--primary); }
.status-mode { font-size: 22px; font-weight: 700; }

.progress { background: var(--card2); border-radius: 999px; height: 14px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--ok); width: 0%; transition: width .3s; }

.item { background: var(--card2); border: 1px solid var(--border); border-radius: 10px; padding: 12px; display: grid; gap: 10px; margin-bottom: 10px; }
.item .row-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.days { display: flex; gap: 4px; flex-wrap: wrap; }
.days label { display: flex; flex-direction: row; align-items: center; gap: 4px; font-size: 13px; background: var(--card); padding: 4px 8px; border-radius: 8px; border: 1px solid var(--border); }
.days input { width: auto; }

.bar-row { display: grid; grid-template-columns: 140px 1fr 56px; align-items: center; gap: 8px; margin: 6px 0; }
.bar-row .name { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--card2); border-radius: 6px; height: 20px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); }
.bar-row .val { text-align: right; font-size: 13px; color: var(--muted); }
.hour-chart { display: flex; align-items: end; gap: 3px; height: 120px; }
.hour-chart .h { flex: 1; background: var(--primary); border-radius: 3px 3px 0 0; min-height: 2px; position: relative; }
.hour-chart .h span { position: absolute; bottom: -18px; left: 50%; transform: translateX(-50%); font-size: 9px; color: var(--muted); }

.code-box { font-size: 28px; font-weight: 800; letter-spacing: 3px; text-align: center; padding: 16px; background: var(--card2); border-radius: 12px; border: 1px dashed var(--primary); }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ok); color: #000; padding: 10px 18px; border-radius: 10px; box-shadow: 0 4px 20px rgba(0,0,0,.3); z-index: 100; }
.toast.err { background: var(--danger); color: #fff; }

@media (max-width: 600px) {
  .status-card { grid-template-columns: auto 1fr; }
  .bar-row { grid-template-columns: 100px 1fr 48px; }
}