:root {
  --bg:       #0a0a14;
  --card:     #12121e;
  --border:   #1e1e2e;
  --text:     #d8d8e8;
  --dim:      #666680;
  --accent:   #4fc3f7;
  --green:    #66bb6a;
  --red:      #ef5350;
  --yellow:   #ffa726;
  --grey:     #78909c;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Mono', monospace;
  font-size: 13px;
  line-height: 1.5;
}

/* ── Header ─────────────────────────────────────────────── */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.dot-icon { font-size: 10px; }

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.last-update { color: var(--dim); font-size: 11px; }

/* ── Reset button ────────────────────────────────────────── */

.reset-btn {
  padding: 3px 11px;
  border: 1px solid #4a1818;
  background: #280d0d;
  color: var(--red);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  transition: border-color 0.12s, background 0.12s;
}

.reset-btn:hover:not(:disabled) {
  border-color: var(--red);
  background: #3a1515;
}

.reset-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ── Toast notification ───────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 999;
  max-width: 340px;
}

.toast.show { opacity: 1; }
.toast.ok  { background: #0e2318; color: var(--green); border: 1px solid #1a4030; }
.toast.err { background: #280d0d; color: var(--red);   border: 1px solid #4a1818; }
.toast.info { background: #0d1e2e; color: var(--accent); border: 1px solid #1a3450; }

/* ── Connectivity badge ───────────────────────────────────── */

.state-badge {
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.state-up      { background: #0e2318; color: var(--green); border: 1px solid #1a4030; }
.state-down    { background: #280d0d; color: var(--red);   border: 1px solid #4a1818; }
.state-unknown { background: #151525; color: var(--grey);  border: 1px solid #252540; }

/* ── Window selector ─────────────────────────────────────── */

.window-bar {
  display: flex;
  gap: 8px;
  padding: 9px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.win-btn {
  padding: 3px 11px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--dim);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
}

.win-btn:hover  { border-color: var(--accent); color: var(--accent); }
.win-btn.active { background: var(--accent); color: #000; border-color: var(--accent); font-weight: 700; }

/* ── Main layout ─────────────────────────────────────────── */

main {
  padding: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.top-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 700px) {
  .top-grid { grid-template-columns: 1fr; }
}

/* ── Cards ───────────────────────────────────────────────── */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.card:last-child { margin-bottom: 0; }

h2 {
  font-size: 10px;
  font-weight: 600;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.10em;
  margin-bottom: 12px;
}

/* ── Charts ──────────────────────────────────────────────── */

.chart {
  display: block;
  width: 100%;
  height: 200px;
}

/* ── Tables ──────────────────────────────────────────────── */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.data-table th {
  text-align: left;
  color: var(--dim);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0 8px 7px 0;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 6px 8px 6px 0;
  border-bottom: 1px solid #15152a;
  color: var(--text);
  white-space: nowrap;
}

.data-table tr:last-child td { border-bottom: none; }

.empty {
  color: var(--dim);
  text-align: center;
  padding: 16px 0;
}

/* ── Status badges inside tables ─────────────────────────── */

.ok  { display: inline-block; padding: 1px 6px; background: #0e2318; color: var(--green); border-radius: 3px; font-size: 10px; font-weight: 700; }
.err { display: inline-block; padding: 1px 6px; background: #280d0d; color: var(--red);   border-radius: 3px; font-size: 10px; font-weight: 700; }
.ongoing { color: var(--red); font-weight: 700; }

/* ── Auth overlay (IoT / remote mode) ───────────────────── */

.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 20, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.auth-overlay[hidden] { display: none; }

.auth-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px 36px;
  width: 300px;
  text-align: center;
}

.auth-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.auth-subtitle {
  color: var(--dim);
  font-size: 11px;
  margin-bottom: 20px;
}

.auth-box input[type="password"] {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  margin-bottom: 10px;
  outline: none;
  transition: border-color 0.12s;
}

.auth-box input[type="password"]:focus { border-color: var(--accent); }

.auth-box button[type="submit"] {
  width: 100%;
  padding: 9px;
  background: var(--accent);
  border: none;
  border-radius: 5px;
  color: #000;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.12s;
}

.auth-box button[type="submit"]:hover:not(:disabled) { opacity: 0.85; }
.auth-box button[type="submit"]:disabled { opacity: 0.45; cursor: not-allowed; }

.auth-error {
  color: var(--red);
  font-size: 11px;
  margin-top: 10px;
  min-height: 1em;
}