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

:root {
  --bg:       #07090e;
  --surface:  #0c1220;
  --surface2: #111827;
  --surface3: #1a2438;
  --border:   #1c2840;
  --border2:  #253450;
  --text:     #ccd6e8;
  --muted:    #4e6580;
  --accent:   #11c8b5;
  --heat:     #f04040;
  --cool:     #40a8f8;
  --idle:     #24d09a;
  --warn:     #e09030;
  --radius:   4px;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 20px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Header ──────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}

.header-brand { display: flex; align-items: center; gap: 12px; }
.header-right  { display: flex; align-items: center; gap: 10px; }

.unit-toggle { display: flex; gap: 2px; }
.unit-opt {
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}
.unit-opt.active { background: var(--accent); border-color: var(--accent); color: #000; }
.unit-opt:not(.active):hover { border-color: var(--accent); color: var(--text); }

.brand-tag {
  background: var(--accent);
  color: #000;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  padding: 3px 8px;
  border-radius: 2px;
  text-transform: uppercase;
}

header h1 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header h1 span { color: var(--accent); }

/* ── Status badge ────────────────────────────────────────── */
.status-badge {
  padding: 5px 14px;
  border-radius: 2px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition: all 0.3s;
  border: 1px solid;
}

.status-badge.idle    { background: rgba(36,208,154,0.08);  color: var(--idle); border-color: rgba(36,208,154,0.3); }
.status-badge.heating { background: rgba(240,64,64,0.10);   color: var(--heat); border-color: rgba(240,64,64,0.35); }
.status-badge.cooling { background: rgba(64,168,248,0.10);  color: var(--cool); border-color: rgba(64,168,248,0.35); }
.status-badge.manual  { background: rgba(224,144,48,0.10);  color: var(--warn); border-color: rgba(224,144,48,0.35); }

/* ── Layout ──────────────────────────────────────────────── */
.row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

@media (max-width: 900px) { .row-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .row-3, .row-2 { grid-template-columns: 1fr; } }

/* ── Mobile ──────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  body { padding: 10px 12px; }

  /* Sidebar: start collapsed (icon-only) on small screens */
  .sidebar { width: 52px; }
  .sidebar .nav-label { opacity: 0; pointer-events: none; }

  /* Scale down the large temperature readout */
  .temp-value { font-size: 3rem; }

  /* Shrink charts so they don't overflow */
  .chart-wrap { height: 140px; }

  /* Header: tighter gap and smaller title */
  header { padding-bottom: 10px; margin-bottom: 12px; gap: 8px; }
  header h1 { font-size: 1.05rem; }

  /* Touch-friendly: larger tap targets for adjust buttons */
  .btn-adj { width: 36px; height: 36px; font-size: 1.1rem; }

  /* Manual device buttons: two columns on small screens */
  .manual-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
  .btn-device { min-width: unset; }

  /* Cost inputs: full width rows */
  .control-row { flex-direction: column; }
  .control-group { width: 100%; }
  .cost-input { width: 100%; text-align: left; }

  /* Weather grid: 2 cols instead of 3 */
  .weather-grid { grid-template-columns: repeat(2, 1fr); }

  /* Cards: less padding */
  .card { padding: 12px 12px; }

  /* Range buttons: smaller text */
  .btn-range { padding: 3px 7px; font-size: 0.65rem; }

  /* Event log table: compress columns */
  .event-log-table td, .event-log-table th { padding: 5px 6px; font-size: 0.72rem; }
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--border2);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.card-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 14px;
}

.label-note {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.7;
}

.card-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.card-header-row .card-label { margin-bottom: 0; }

/* ── Temperature display ─────────────────────────────────── */
.temp-display {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  margin-bottom: 16px;
}

.temp-value {
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
  transition: color 0.4s;
}

.temp-unit {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--muted);
  padding-bottom: 10px;
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.control-label {
  font-size: 0.75rem;
  color: var(--muted);
  flex: 1;
}

.control-adj {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-val {
  font-size: 0.95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 62px;
  text-align: center;
}

.btn-adj {
  width: 26px;
  height: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface3);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  line-height: 1;
}

.btn-adj:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

/* ── Device list ─────────────────────────────────────────── */
.device-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border2);
  transition: all 0.25s;
}

.device-icon { font-size: 1.1rem; }

.device-name {
  flex: 1;
  font-size: 0.82rem;
  color: var(--muted);
}

.pin-tag {
  display: inline-block;
  background: var(--surface3);
  color: var(--muted);
  font-size: 0.6rem;
  font-family: monospace;
  padding: 1px 5px;
  border-radius: 2px;
  margin-left: 4px;
  vertical-align: middle;
  border: 1px solid var(--border2);
}

.device-state {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-on  { color: var(--idle); }
.status-off { color: var(--muted); }

.device-item.active-heat {
  border-left-color: var(--heat);
  background: rgba(240,64,64,0.06);
}

.device-item.active-cool {
  border-left-color: var(--cool);
  background: rgba(64,168,248,0.06);
}

/* ── Outdoor weather ─────────────────────────────────────── */
.weather-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin-bottom: 12px;
}

.weather-stat {
  padding: 8px 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.ws-val {
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.ws-val--sm { font-size: 0.78rem; }

.ws-label {
  font-size: 0.6rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 3px;
}

.city-search {
  display: flex;
  gap: 8px;
}

.city-input {
  flex: 1;
  padding: 7px 10px;
  border-radius: var(--radius);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  outline: none;
  transition: border-color 0.2s;
}

.city-input:focus { border-color: var(--accent); }

.btn-sm {
  padding: 7px 14px;
  border-radius: var(--radius);
  background: var(--accent);
  border: none;
  color: #000;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity 0.15s;
}

.btn-sm:hover { opacity: 0.85; }

/* ── AI Recommendation ───────────────────────────────────── */
.rec-box {
  padding: 12px 14px;
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
  background: rgba(17,200,181,0.05);
  font-size: 0.83rem;
  line-height: 1.8;
  transition: all 0.35s;
}

.rec-box.rec-heat { border-left-color: var(--heat); background: rgba(240,64,64,0.05); }
.rec-box.rec-cool { border-left-color: var(--cool); background: rgba(64,168,248,0.05); }
.rec-box.rec-idle { border-left-color: var(--idle); background: rgba(36,208,154,0.05); }

.stat-strip {
  display: flex;
  gap: 24px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.stat-item .sv {
  font-size: 1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-item .sk {
  font-size: 0.6rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 3px;
}

/* ── Mode control ────────────────────────────────────────── */
.mode-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mode-row strong { font-size: 0.92rem; }

.mode-btns { display: flex; gap: 6px; }

.btn-mode {
  padding: 6px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.04em;
}

.btn-mode.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

.btn-mode:not(.active):hover {
  border-color: var(--accent);
  color: var(--text);
}

.manual-panel {
  margin-top: 14px;
  padding: 12px;
  border-radius: var(--radius);
  background: var(--surface2);
  border: 1px solid var(--border);
}

.manual-warn {
  font-size: 0.68rem;
  color: var(--warn);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.manual-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-device {
  flex: 1;
  min-width: 90px;
  padding: 9px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface3);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.btn-device:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

/* ── Chart ───────────────────────────────────────────────── */
.chart-wrap {
  position: relative;
  width: 100%;
  height: 180px;
}

canvas {
  display: block;
  width: 100% !important;
}

/* ── App layout ──────────────────────────────────────────── */
.app-layout {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.view-container { flex: 1; min-width: 0; }

.btn-hamburger {
  background: none;
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: var(--radius);
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}

.btn-hamburger:hover { background: var(--surface2); border-color: var(--accent); }

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: 180px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-right: 12px;
  padding: 6px 0;
  transition: width 0.2s;
  overflow: hidden;
}

.sidebar.collapsed { width: 52px; }

.nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border: none;
  border-left: 2px solid transparent;
  background: none;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  white-space: nowrap;
}

.nav-btn:hover { background: var(--surface2); color: var(--text); }
.nav-btn.active { background: var(--surface2); color: var(--accent); border-left-color: var(--accent); }

.nav-icon { font-size: 1.05rem; flex-shrink: 0; }
.nav-label { transition: opacity 0.15s; }
.sidebar.collapsed .nav-label { opacity: 0; pointer-events: none; }

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 32px;
  width: 320px;
  max-width: 90vw;
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.modal-field { margin-bottom: 14px; }

.modal-label {
  display: block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 6px;
}

.modal-start { width: 100%; margin-top: 4px; padding: 9px; }

/* ── History view ────────────────────────────────────────── */
.range-btns { display: flex; gap: 4px; }

.btn-range {
  padding: 3px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-range.active { background: var(--accent); border-color: var(--accent); color: #000; }
.btn-range:not(.active):hover { border-color: var(--accent); color: var(--text); }

.event-log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.event-log-table th {
  text-align: left;
  padding: 6px 10px;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.event-log-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.event-log-table tr.ev-heat td { background: rgba(240,64,64,0.05); }
.event-log-table tr.ev-cool td { background: rgba(64,168,248,0.05); }
.event-log-table tr.ev-fan  td { background: rgba(36,208,154,0.05); }

.log-empty {
  color: var(--muted);
  font-size: 0.82rem;
  padding: 16px 0;
  text-align: center;
}

/* ── Analysis view ───────────────────────────────────────── */
.tuning-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.tuning-hints span {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.5;
}

.cost-input {
  width: 80px;
  padding: 4px 8px;
  border-radius: var(--radius);
  background: var(--surface3);
  border: 1px solid var(--border2);
  color: var(--text);
  font-size: 0.82rem;
  text-align: right;
  outline: none;
}

.cost-input:focus { border-color: var(--accent); }

/* ── History chart tooltip ──────────────────────────────────────── */
.chart-tooltip {
  display: none;
  position: absolute;
  pointer-events: none;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 0.75rem;
  min-width: 130px;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.tip-time {
  font-size: 0.65rem;
  color: var(--muted);
  margin-bottom: 5px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
}

.tip-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 2px 0;
}

.tip-row span { color: var(--muted); }

/* ── History summary strip ─────────────────────────────────────── */
.history-summary {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 0;
  margin-bottom: 12px;
}

.hs-item {
  flex: 1;
  min-width: 70px;
  text-align: center;
  padding: 6px 8px;
  background: var(--surface2);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.hs-val {
  font-size: 0.95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.hs-val.heat { color: var(--heat); }
.hs-val.cool { color: var(--cool); }
.hs-val.fan  { color: var(--idle); }

.hs-lbl {
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 3px;
}