:root {
  --bg: #f6f4f1;
  --surface: #ffffff;
  --surface-2: #f1eee9;
  --text: #1d1b19;
  --muted: #6b665f;
  --border: #e3ded6;
  --accent: #e8590c;
  --accent-soft: #fff0e6;
  --cool: #1c7ed6;
  --cool-soft: #e7f2fc;
  --ok: #2f9e44;
  --warn: #e67700;
  --danger: #c92a2a;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.04), 0 4px 16px rgb(0 0 0 / 0.04);
  --radius: 16px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312;
    --surface: #1d1c1a;
    --surface-2: #262422;
    --text: #f1eee9;
    --muted: #a39d94;
    --border: #34312d;
    --accent: #ff7a2e;
    --accent-soft: #3a2416;
    --cool: #4dabf7;
    --cool-soft: #16283a;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 var(--font);
}
[hidden] { display: none !important; }
a { color: var(--cool); }
h1 { font-size: 1.4rem; margin: 0.25rem 0 0.75rem; }
h2 { font-size: 1rem; margin: 0; }
h3 { font-size: 0.9rem; margin: 1rem 0 0.25rem; }
code, pre { font: 13px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; }
pre { background: var(--surface-2); padding: 0.75rem; border-radius: 10px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.muted { color: var(--muted); }
.small { font-size: 0.82rem; }
.err { color: var(--danger); }

button {
  font: inherit;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font-weight: 600;
}
button:hover { filter: brightness(1.05); }
button:disabled { opacity: 0.5; cursor: default; }
button.secondary, .quick button, .room button {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  font-weight: 500;
}
button.danger { color: var(--danger); }
button.link { background: none; color: var(--muted); padding: 0.25rem; font-weight: 500; text-decoration: underline; }
button.icon { background: var(--surface); color: var(--text); border-color: var(--border); width: 36px; height: 36px; padding: 0; font-size: 1.1rem; }
input, select {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.5rem 0.7rem;
  min-width: 0;
}
label { display: grid; gap: 0.35rem; font-weight: 500; margin: 0.75rem 0; }
.row { display: flex; gap: 0.5rem; margin-top: 1rem; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }

/* ---------- Auth pages ---------- */
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.auth-card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.auth-card form > button, .auth-card > form button[type="submit"]:only-of-type { width: 100%; }
.brand { display: flex; align-items: center; gap: 0.4rem; font-weight: 700; letter-spacing: -0.01em; }
.logo { color: var(--accent); font-size: 1.2rem; }
.steps { padding-left: 1.2rem; }
.steps li { margin: 0.4rem 0; }
.code { font: 600 1.1rem ui-monospace, monospace; letter-spacing: 0.08em; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  padding: 0.75rem 16px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.top-meta { display: flex; align-items: center; gap: 0.5rem; position: relative; flex-wrap: wrap; }
.chip { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.7rem; font-size: 0.85rem; white-space: nowrap; }
.segmented { display: inline-flex; background: var(--surface-2); border-radius: 10px; padding: 3px; }
.segmented button { background: none; color: var(--muted); border: 0; padding: 0.35rem 0.7rem; border-radius: 8px; font-weight: 500; }
.segmented button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); font-weight: 600; }
.menu {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
  display: grid; padding: 0.3rem; min-width: 220px; z-index: 10;
}
.menu button { background: none; color: var(--text); text-align: left; font-weight: 500; }
.menu button:hover { background: var(--surface-2); }

/* ---------- Layout ---------- */
.layout { max-width: 1180px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.5rem; }

/* ---------- Suggestions ---------- */
.suggestions { background: linear-gradient(135deg, var(--accent-soft), var(--surface) 55%); }
.spark { color: var(--accent); }
.overview { margin: 0.25rem 0 0.75rem; }
.suggestion-list { display: grid; gap: 0.6rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.suggestion { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0.8rem; display: grid; gap: 0.4rem; align-content: start; }
.suggestion.done { opacity: 0.6; }
.suggestion h3 { margin: 0; font-size: 0.95rem; }
.suggestion p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.tags { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.tag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; border-radius: 6px; padding: 0.1rem 0.4rem; background: var(--surface-2); color: var(--muted); }
.tag.high { background: var(--accent-soft); color: var(--accent); }
.suggestion .row { margin-top: 0.3rem; }
.suggestion .row button { padding: 0.35rem 0.75rem; font-size: 0.88rem; }
.suggest-form { display: flex; gap: 0.5rem; margin-top: 0.8rem; }
.suggest-form input { flex: 1; }
.thinking { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--muted); }
.thinking::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); animation: pulse 1s infinite alternate; }
@keyframes pulse { from { opacity: 0.25; } to { opacity: 1; } }

/* ---------- Quick actions ---------- */
.quick { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.quick #quota { margin-left: auto; }

/* ---------- Rooms ---------- */
.rooms { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.room { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.6rem; min-width: 0; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.room.heating::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--accent); }
.room-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.5rem; }
.room-head h3 { margin: 0; font-size: 1rem; }
.room-temp { display: flex; align-items: baseline; gap: 0.75rem; }
.room-temp .now { font-size: 2.4rem; font-weight: 300; letter-spacing: -0.03em; line-height: 1; }
.room-temp .meta { display: grid; font-size: 0.85rem; color: var(--muted); }
.status { font-size: 0.82rem; color: var(--muted); }
.status .pill { display: inline-block; border-radius: 999px; padding: 0.05rem 0.5rem; background: var(--surface-2); color: var(--text); margin-right: 0.3rem; }
.status .pill.override { background: var(--accent-soft); color: var(--accent); }
.status .pill.off { background: var(--cool-soft); color: var(--cool); }
.bar { height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: inherit; transition: width 0.4s; }
.spark-chart { width: 100%; height: 48px; display: block; }
.spark-chart .line { fill: none; stroke: var(--accent); stroke-width: 1.6; }
.spark-chart .set { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.spark-chart .area { fill: var(--accent-soft); }
.controls { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.5rem; }
.controls select { width: 100%; }
.stepper { display: flex; align-items: center; gap: 0.4rem; }
.stepper button { width: 38px; height: 38px; padding: 0; font-size: 1.2rem; }
.stepper output { flex: 1; text-align: center; font-size: 1.2rem; font-weight: 600; }
.room-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.room-actions button { flex: 1 1 0; min-width: 0; padding: 0.45rem 0.5rem; font-size: 0.88rem; }
.room-actions button.primary { background: var(--accent); color: #fff; border-color: transparent; font-weight: 600; }
.warn { color: var(--warn); font-size: 0.82rem; }

/* ---------- Insights ---------- */
.insights .intro { margin: 0 0 0.8rem; }
.insights h3.sub { margin: 1rem 0 0.5rem; }
.insight-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.insight-card { border: 1px solid var(--border); border-radius: 12px; padding: 0.8rem; min-width: 0; }
.insight-card h3 { margin: 0 0 0.5rem; font-size: 0.92rem; }
.forecast-chart { width: 100%; height: 90px; display: block; }
.forecast-chart .temp { fill: none; stroke: var(--cool); stroke-width: 1.8; }
.forecast-chart .sun { fill: var(--warn); opacity: 0.35; }
.forecast-chart text { fill: var(--muted); font-size: 9px; }
.location { display: flex; flex-wrap: wrap; gap: 0.3rem 0.6rem; align-items: baseline; margin-top: 0.4rem; }
.big-number { font-size: 1.8rem; font-weight: 300; line-height: 1; margin-right: 0.4rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.5rem 0; }
.chips span { background: var(--surface-2); border-radius: 999px; padding: 0.15rem 0.55rem; font-size: 0.8rem; }
.hbar { display: grid; grid-template-columns: minmax(5rem, 9rem) 1fr 2rem; gap: 0.5rem; align-items: center; font-size: 0.82rem; margin: 0.2rem 0; }
.hbar .track { height: 8px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.hbar .track span { display: block; height: 100%; background: var(--accent); border-radius: inherit; }
.hbar .n { text-align: right; color: var(--muted); }
.room-insights { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.room-insight { border: 1px solid var(--border); border-radius: 12px; padding: 0.8rem; display: grid; gap: 0.35rem; font-size: 0.86rem; min-width: 0; }
.room-insight h4 { margin: 0; font-size: 0.95rem; display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.room-insight dl { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.25rem 0.6rem; margin: 0; }
.room-insight dt { color: var(--muted); }
.room-insight dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.badge { font-size: 0.7rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; border-radius: 6px; padding: 0.1rem 0.4rem; background: var(--surface-2); color: var(--muted); }
.badge.good { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.badge.rough { background: var(--accent-soft); color: var(--accent); }
.late-bad { color: var(--danger); }

/* ---------- Activity ---------- */
.activity { list-style: none; margin: 0; padding: 0; display: grid; }
.activity li { display: grid; grid-template-columns: auto 1fr auto; gap: 0.6rem; padding: 0.5rem 0; border-top: 1px solid var(--border); font-size: 0.88rem; align-items: baseline; }
.activity li:first-child { border-top: 0; }
.activity .src { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); min-width: 5.5rem; }
.activity .fail { color: var(--danger); }

/* ---------- Dialog & toast ---------- */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); width: min(560px, calc(100vw - 32px)); padding: 1.25rem; }
dialog::backdrop { background: rgb(0 0 0 / 0.35); }
.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 0.6rem 1rem; border-radius: 10px; max-width: calc(100vw - 32px);
  box-shadow: var(--shadow); z-index: 20; font-size: 0.9rem;
}
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 560px) {
  .topbar { padding: 0.6rem 16px; }
  .suggest-form { flex-direction: column; }
  .quick #quota { margin-left: 0; width: 100%; }
}