:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --card: #ffffff;
  --card-2: #f2f3f5;
  --text: #1a1a1a;
  --muted: #6b7280;
  --border: #e2e2e2;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --accent-soft: #e6f1fb;
  --accent-soft-text: #0c447c;
  --heat-soft: #fdecec;
  --heat-text: #a32d2d;
  --cool-soft: #e6f1fb;
  --cool-text: #0c447c;
  --ok-soft: #e7f6ec;
  --ok-text: #1b6b39;
  --warn-soft: #fef3e2;
  --warn-text: #92600a;
  --danger: #dc2626;
  /* Card status colors (overridable per-install via the Settings page). */
  --st-cooling: var(--accent);
  --st-satisfied: var(--ok-text);
  --st-heating: var(--danger);
  --st-alert: #8a5206; /* deeper amber */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --card: #1e1e1e;
    --card-2: #262626;
    --text: #f0f0f0;
    --muted: #9aa0a6;
    --border: #333;
    --accent-soft: #10233a;
    --accent-soft-text: #85b7eb;
    --heat-soft: #3a1414;
    --heat-text: #f09595;
    --cool-soft: #10233a;
    --cool-text: #85b7eb;
    --ok-soft: #13301d;
    --ok-text: #97d1ab;
    --warn-soft: #3a2f10;
    --warn-text: #f0d38a;
  }
}

* { box-sizing: border-box; }

body { margin: 0; background: var(--bg); color: var(--text); min-height: 100vh; }

a { color: var(--accent); }

/* ---- Login ---- */
.center-screen { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; }
.login-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; width: 100%; max-width: 360px; }
.login-card h1 { font-size: 1.3rem; margin: 0 0 4px; }
.login-card p.sub { color: var(--muted); margin: 0 0 16px; font-size: 0.9rem; }

/* ---- Header / nav ---- */
header.top {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 12px 18px; border-bottom: 1px solid var(--border);
  background: var(--card); position: sticky; top: 0; z-index: 20;
}
header.top .brand { font-weight: 600; margin-right: 8px; display: flex; align-items: center; gap: 6px; }
nav.tabs { display: flex; gap: 2px; flex-wrap: wrap; }
nav.tabs a {
  padding: 6px 12px; border-radius: 8px; text-decoration: none;
  color: var(--muted); font-size: 0.9rem; font-weight: 500;
}
nav.tabs a.active { background: var(--accent-soft); color: var(--accent-soft-text); }
nav.tabs a:hover { color: var(--text); }
header.top .spacer { flex: 1; }
header.top .who { font-size: 0.85rem; color: var(--muted); }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; font-size: 0.85rem; padding: 0; width: auto; margin: 0; }

main { padding: 18px; max-width: 1000px; margin: 0 auto; }

h2.page-title { font-size: 1.15rem; margin: 0 0 12px; font-weight: 500; }

/* ---- Toolbar ---- */
.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar .grow { flex: 1; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { margin: 0; width: auto; padding: 7px 12px; border: none; border-left: 1px solid var(--border);
  background: var(--card); color: var(--muted); font-size: 0.85rem; font-weight: 500; border-radius: 0; }
.seg button:first-child { border-left: none; }
.seg button.active { background: var(--accent-soft); color: var(--accent-soft-text); }

/* ---- Form controls ---- */
input, select, textarea {
  padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); font-size: 0.95rem; font-family: inherit;
}
label { display: block; font-size: 0.82rem; color: var(--muted); margin: 10px 0 4px; }
button {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--card); color: var(--text); font-size: 0.9rem; cursor: pointer; font-weight: 500;
}
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { color: var(--danger); border-color: var(--danger); }
button.wide { width: 100%; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Cards grid ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tcard { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px; position: relative; }
/* Status tints: colored border + soft background wash (colors from --st-*). */
.tcard.status-cooling   { border-color: var(--st-cooling);   background: color-mix(in srgb, var(--st-cooling) 12%, var(--card)); }
.tcard.status-satisfied { border-color: var(--st-satisfied); background: color-mix(in srgb, var(--st-satisfied) 12%, var(--card)); }
.tcard.status-heating   { border-color: var(--st-heating);   background: color-mix(in srgb, var(--st-heating) 12%, var(--card)); }
.tcard.status-alert     { border-color: var(--st-alert);     background: color-mix(in srgb, var(--st-alert) 14%, var(--card)); }
/* status-off: neutral unless an --st-off color is configured (falls back to no tint). */
.tcard.status-off { border-color: var(--st-off, var(--border)); background: color-mix(in srgb, var(--st-off, transparent) 12%, var(--card)); }
/* Full-width centered status banner (first line). */
.tcard .statusline .badge { display: block; width: 100%; text-align: center; padding: 4px 0; margin-bottom: 8px; font-size: 0.82rem; }
/* Top section (name -> loc -> mode -> setpoints) is larger; footer stays compact. */
.tcard .name { font-weight: 600; font-size: 1.05rem; }
.tcard .loc { font-size: 0.82rem; color: var(--muted); }
.tcard .serial { font-size: 0.7rem; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; margin-top: 2px; letter-spacing: 0.02em; }
td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8rem; }
.tcard .line { font-size: 0.82rem; color: var(--muted); margin-top: 3px; }
.tcard .temps { display: flex; gap: 14px; align-items: flex-end; margin-top: 9px; }
.tcard .tblock .lbl { font-size: 0.68rem; color: var(--muted); }
.tcard .tblock .val { font-size: 1.7rem; font-weight: 600; line-height: 1; }
/* Supply value picks up the state color to draw the eye. */
.tcard.status-cooling .supply-val { color: var(--st-cooling); }
.tcard.status-heating .supply-val { color: var(--st-heating); }
.tcard.status-alert .supply-val { color: var(--st-alert); }
.tcard .topline { border-top: 0.5px solid var(--border); padding-top: 7px; margin-top: 8px; }
.tcard .topline, .tcard .meta { font-size: 0.7rem; color: var(--muted); }
.tcard .meta { margin-top: 6px; }
.tcard.clickable { cursor: pointer; }
.tcard.clickable:hover { border-color: var(--accent); }
.tcard.selected { box-shadow: 0 0 0 1px var(--accent) inset; }
.tcard .sel { position: absolute; top: 10px; right: 10px; }

/* ---- Badges ---- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: 0.72rem; font-weight: 600; }
.mode-cool { background: var(--cool-soft); color: var(--cool-text); }
.mode-heat { background: var(--heat-soft); color: var(--heat-text); }
.mode-off, .mode-auto { background: var(--card-2); color: var(--muted); border: 1px solid var(--border); }
.badge-ok { background: var(--ok-soft); color: var(--ok-text); }
.badge-muted { background: var(--card-2); color: var(--muted); }
.badge-cool { background: var(--cool-soft); color: var(--cool-text); }
.badge-heat { background: var(--heat-soft); color: var(--heat-text); }
.badge-alert { background: var(--warn-soft); color: var(--st-alert); }

/* ---- Table ---- */
.table-wrap { background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead th { background: var(--card-2); color: var(--muted); text-align: left; font-weight: 500; padding: 10px 12px; }
tbody td { padding: 10px 12px; border-top: 1px solid var(--border); }
tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover { background: var(--card-2); }
tbody tr.selected { background: var(--accent-soft); }
tbody tr.status-cooling { background: color-mix(in srgb, var(--st-cooling) 12%, var(--card)); }
tbody tr.status-satisfied { background: color-mix(in srgb, var(--st-satisfied) 12%, var(--card)); }
tbody tr.status-heating { background: color-mix(in srgb, var(--st-heating) 12%, var(--card)); }
tbody tr.status-alert { background: color-mix(in srgb, var(--st-alert) 14%, var(--card)); }
tbody tr.status-off { background: color-mix(in srgb, var(--st-off, transparent) 12%, var(--card)); }

/* ---- Bulk bar ---- */
.bulkbar { background: var(--accent-soft); border: 1px solid var(--accent); border-radius: 12px;
  padding: 10px 14px; margin-bottom: 12px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.bulkbar .lbl { font-weight: 600; color: var(--accent-soft-text); font-size: 0.85rem; }
.bulkbar .num { min-width: 40px; text-align: center; font-weight: 600; }

/* ---- Banner ---- */
.banner { border-radius: 12px; padding: 12px 14px; margin-bottom: 12px; display: flex;
  align-items: center; gap: 10px; flex-wrap: wrap; }
.banner.danger { background: var(--heat-soft); color: var(--heat-text); border: 1px solid var(--heat-text); }
.banner.warn { background: var(--warn-soft); color: var(--warn-text); border: 1px solid var(--warn-text); }
.banner .grow { flex: 1; }

/* ---- Generic cards / rows ---- */
.panel { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 14px; }
.panel h3 { margin: 0 0 12px; font-size: 1rem; font-weight: 500; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 0; }
.muted { color: var(--muted); }
.right { text-align: right; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.stepper { display: inline-flex; align-items: center; gap: 8px; }
.stepper button { width: 34px; height: 34px; padding: 0; }
.stepper .val { font-size: 1.4rem; font-weight: 600; min-width: 48px; text-align: center; }
.error { color: var(--danger); font-size: 0.85rem; min-height: 1em; }
.ok-msg { color: var(--ok-text); font-size: 0.85rem; min-height: 1em; }
.empty, .loading { color: var(--muted); text-align: center; padding: 40px 0; }
.chip { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: 0.72rem;
  background: var(--card-2); color: var(--muted); border: 1px solid var(--border); margin: 1px; }

/* ---- Modal ---- */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex;
  align-items: center; justify-content: center; padding: 16px; z-index: 100; }
.modal { background: var(--card); border-radius: 12px; padding: 22px; width: 100%; max-width: 480px;
  max-height: 85vh; overflow-y: auto; position: relative; }
.modal h3 { margin: 0 0 14px; }
.modal .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

.hidden { display: none !important; }

/* ---- Mobile ---- */
.nav-toggle {
  display: none; width: auto; margin: 0; padding: 6px 10px; font-size: 1.1rem; line-height: 1;
  border: 1px solid var(--border); border-radius: 8px; background: var(--card);
}

@media (max-width: 700px) {
  header.top { gap: 8px; padding: 10px 12px; }
  .nav-toggle { display: inline-flex; align-items: center; }
  header.top .brand { flex: 1; font-size: 0.98rem; }
  header.top .who { display: none; }
  nav.tabs {
    display: none; order: 10; width: 100%; flex-direction: column; gap: 2px;
    margin-top: 6px; padding-top: 6px; border-top: 1px solid var(--border);
  }
  nav.tabs.open { display: flex; }
  nav.tabs a { padding: 10px 8px; border-radius: 8px; }

  main { padding: 12px; }
  .toolbar { gap: 8px; }
  .toolbar .seg, .toolbar select, .toolbar input { flex: 1; }

  /* Buttons and controls easier to tap */
  button, .seg button { padding: 10px 14px; }
  input, select, textarea { font-size: 16px; } /* avoids iOS zoom-on-focus */

  /* Responsive tables: each row becomes a stacked card */
  table.responsive thead { display: none; }
  table.responsive, table.responsive tbody, table.responsive tr, table.responsive td { display: block; width: 100%; }
  table.responsive tr {
    border: 1px solid var(--border); border-radius: 12px; margin: 0 0 10px; padding: 8px 12px; background: var(--card);
  }
  table.responsive td {
    border: none; padding: 6px 0; display: flex; justify-content: space-between; gap: 14px; text-align: right;
  }
  table.responsive td::before {
    content: attr(data-label); color: var(--muted); font-weight: 500; text-align: left; white-space: nowrap;
  }
  table.responsive td[data-label=""]::before { content: ""; }
  table.responsive td.right { justify-content: flex-end; }
  .bulkbar { gap: 8px; }
}