:root {
  --bg: #0f1419;
  --card: #1a2129;
  --card-2: #222b35;
  --text: #e7edf3;
  --muted: #8a929b;
  --accent: #2b9bd6;
  --on: #36b37e;
  --off: #3a434e;
  --danger: #d6453b;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: var(--card);
  border-bottom: 1px solid #000;
}
.topbar h1 { font-size: 1.1rem; margin: 0; }
.topbar-right { display: flex; align-items: center; gap: 14px; font-size: .9rem; }
.user { color: var(--muted); }
.logout { color: var(--accent); text-decoration: none; }

.conn { font-size: 1rem; }
.conn-ok { color: var(--on); }
.conn-bad { color: var(--danger); }
.conn-unknown { color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  padding: 18px;
  max-width: 920px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid #000;
}
.label { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: 10px; }
.muted { color: var(--muted); font-size: .82rem; margin-top: 10px; }

.temp-card { text-align: center; }
.big-temp { font-size: 4.2rem; font-weight: 700; line-height: 1; }
.big-temp .unit { font-size: 1.4rem; color: var(--muted); margin-left: 4px; }

.target-row { display: flex; align-items: center; gap: 14px; }
#targetSlider { flex: 1; accent-color: var(--accent); }
.target-value { font-size: 1.6rem; font-weight: 600; min-width: 70px; text-align: right; }

.toggle {
  width: 100%;
  padding: 16px;
  font-size: 1.2rem;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  background: var(--off);
  color: var(--text);
  cursor: pointer;
  transition: background .15s;
}
.toggle.on { background: var(--on); }

.status-card .status { font-size: 1.6rem; font-weight: 600; }
.cooldown { margin-top: 12px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.mono { font-variant-numeric: tabular-nums; font-size: 1.3rem; font-weight: 600; }

.btn-secondary {
  padding: 8px 14px; border: 1px solid var(--accent); background: transparent;
  color: var(--accent); border-radius: 8px; cursor: pointer; font-size: .85rem;
}

.indicator { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 600; }
.indicator .dot { width: 16px; height: 16px; border-radius: 50%; background: var(--off); }
.indicator.on .dot { background: var(--danger); box-shadow: 0 0 12px var(--danger); }

.footer { text-align: center; padding: 0 0 30px; }
.footer a { color: var(--accent); text-decoration: none; }

.hidden { display: none !important; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--card-2); color: var(--text); padding: 12px 18px;
  border-radius: 10px; box-shadow: 0 6px 20px rgba(0,0,0,.4); font-size: .9rem;
}
.toast-error { background: var(--danger); }

/* login */
.login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-card {
  background: var(--card); padding: 28px; border-radius: var(--radius);
  width: 320px; display: flex; flex-direction: column; gap: 14px; border: 1px solid #000;
}
.login-card h1 { margin: 0 0 6px; text-align: center; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: .85rem; color: var(--muted); }
.login-card input {
  padding: 10px; border-radius: 8px; border: 1px solid #000;
  background: var(--bg); color: var(--text); font-size: 1rem;
}
.login-card button {
  padding: 12px; border: none; border-radius: 8px; background: var(--accent);
  color: #fff; font-size: 1rem; font-weight: 600; cursor: pointer;
}
.error { color: var(--danger); font-size: .85rem; margin: 0; }
.success { color: var(--on); font-size: .85rem; margin: 0; }

/* history */
.history-main { max-width: 920px; margin: 0 auto; padding: 18px; }
.range-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.range-btn {
  padding: 8px 14px; border: 1px solid var(--off); background: var(--card);
  color: var(--text); border-radius: 8px; cursor: pointer;
}
.range-btn.active { border-color: var(--accent); color: var(--accent); }
#chart { width: 100%; height: auto; }
.legend { display: flex; align-items: center; gap: 8px; }
.key { display: inline-block; width: 14px; height: 4px; border-radius: 2px; }
.key-water { background: #2b9bd6; }
.key-target { background: #e0883a; }
.key-heat { background: rgba(214,69,59,.5); height: 12px; }

/* device console */
.device-select {
  background: var(--bg); color: var(--text); border: 1px solid var(--off);
  border-radius: 8px; padding: 6px 10px; font-size: .9rem;
}
.token-banner { border: 1px solid var(--accent); }
.token {
  display: block; margin-top: 8px; padding: 12px; background: var(--bg);
  border-radius: 8px; font-size: 1rem; word-break: break-all; user-select: all;
}
table.devices { width: 100%; border-collapse: collapse; margin-top: 8px; }
table.devices th, table.devices td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--off); }
table.devices th { font-size: .75rem; text-transform: uppercase; color: var(--muted); }
.row-actions { display: flex; gap: 8px; }
.row-actions form { margin: 0; }
.badge { padding: 2px 8px; border-radius: 10px; font-size: .75rem; }
.badge-on { background: rgba(54,179,126,.2); color: var(--on); }
.badge-off { background: rgba(58,67,78,.4); color: var(--muted); }
.btn-danger {
  padding: 8px 14px; border: 1px solid var(--danger); background: transparent;
  color: var(--danger); border-radius: 8px; cursor: pointer; font-size: .85rem;
}
.add-device { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-top: 8px; }
.add-device label { display: flex; flex-direction: column; gap: 6px; font-size: .8rem; color: var(--muted); }
.add-device input {
  padding: 10px; border-radius: 8px; border: 1px solid var(--off);
  background: var(--bg); color: var(--text); font-size: 1rem;
}
.add-device button {
  padding: 11px 18px; border: none; border-radius: 8px; background: var(--accent);
  color: #fff; font-weight: 600; cursor: pointer;
}

/* read-only + users admin */
.readonly-note {
  max-width: 920px; margin: 16px auto -4px; padding: 10px 18px;
  background: rgba(58,67,78,.4); color: var(--muted); border-radius: 8px;
}
.user-row { border-bottom: 1px solid var(--off); padding: 14px 0; }
.user-row:last-child { border-bottom: none; }
.user-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.user-head strong { min-width: 120px; }
.inline-input {
  padding: 9px 10px; border-radius: 8px; border: 1px solid var(--off);
  background: var(--bg); color: var(--text); font-size: .95rem;
}
.device-assign { display: flex; gap: 14px; flex-wrap: wrap; margin: 10px 0; align-items: center; }
.chk { display: flex; align-items: center; gap: 6px; font-size: .9rem; }
.assign-note { font-size: .8rem; }
button[disabled], input[disabled] { opacity: .5; cursor: not-allowed; }