* { box-sizing: border-box; }
:root {
  --bg: #f6f7f4;
  --panel: #fff;
  --soft: #f0f4ef;
  --text: #172017;
  --muted: #627063;
  --line: #d9e2d8;
  --accent: #1f7a5a;
  --accent-soft: #e2f1ea;
  --cool: #1d6fb8;
  --heat: #c83b30;
  --neutral: #2f8f5b;
  --pause: #d8ddd6;
  --target: #d99028;
  --danger: #8a2b24;
  --shadow: 0 10px 28px rgba(33, 45, 35, 0.10);
}
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font-family: Arial, Helvetica, sans-serif; }
a { color: var(--accent); text-decoration: none; font-weight: 700; }
button, input, select, textarea { font: inherit; }
.app { width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 40px; }
.topbar { display: flex; justify-content: space-between; gap: 18px; align-items: center; margin-bottom: 18px; }
h1 { margin: 0; font-size: clamp(26px, 4vw, 38px); }
h2 { margin: 0 0 14px; font-size: 22px; }
h3 { margin: 0 0 10px; font-size: 18px; }
p { color: var(--muted); line-height: 1.5; }
.subtitle { margin: 0; color: var(--muted); line-height: 1.5; max-width: 760px; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.btn, button, .primary { display: inline-block; border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; background: var(--panel); color: var(--text); text-decoration: none; box-shadow: 0 2px 8px rgba(33,45,35,.06); cursor: pointer; font-weight: 700; }
.btn.primary, button.primary, .primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(340px, .75fr); gap: 16px; align-items: start; }
.setup-layout { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.stack { display: grid; gap: 16px; }
.panel, .card, .login-card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
.panel { padding: 18px; }
.card { margin-top: 12px; background: #fff; overflow: hidden; }
.card summary { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 14px; cursor: pointer; list-style: none; }
.card summary::-webkit-details-marker { display: none; }
.card summary::after { content: 'Aufklappen'; color: var(--muted); font-size: 13px; }
.card[open] summary { border-bottom: 1px solid var(--line); }
.card[open] summary::after { content: 'Schliessen'; }
.card-body { padding: 14px; }
.card-title small { display: block; margin-top: 3px; color: var(--muted); font-weight: 400; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.thirds { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.compact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.grid.two, .module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.controls { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: end; }
.control { margin-top: 12px; }
label { display: block; color: var(--muted); font-size: 13px; font-weight: 700; margin-bottom: 7px; }
input, select, textarea { width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: #fff; color: var(--text); }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 13px; line-height: 1.45; }
input[type='checkbox'] { width: auto; }
.control span, .hint { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.inline-check { display: flex; gap: 8px; align-items: center; min-height: 39px; margin: 0; color: var(--text); font-weight: 600; }
.switch-panel { border: 1px solid #e7d6a8; border-radius: 8px; padding: 12px; background: #fff6df; }
.switch-panel.active { border-color: #b9dbc9; background: #edf8f2; }
.setting-group { margin-top: 14px; }
.setting-group-title { margin: 0 0 10px; color: var(--muted); font-size: 13px; font-weight: 700; text-transform: uppercase; }
.sensor-list { display: grid; gap: 10px; }
.info-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.info-tile { border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: #fbfcfa; }
.info-tile span { display: block; color: var(--muted); font-size: 12px; font-weight: 700; margin-bottom: 4px; text-transform: uppercase; }
.info-tile strong { display: block; font-size: 14px; }
.info-tile small { display: block; margin-top: 4px; color: var(--muted); line-height: 1.35; }
.sensor-card { border: 1px solid var(--line); border-radius: 8px; padding: 12px; background: #fbfcfa; }
.sensor-card.calibrated { background: var(--accent-soft); border-color: #bfddcf; }
.sensor-card strong { display: block; margin-bottom: 4px; }
.sensor-card small { color: var(--muted); word-break: break-all; }
.statusline { margin: 0 0 18px; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: #fff; color: var(--muted); }
.statusline.ok { border-color: #b9dbc9; background: #edf8f2; color: #175f3d; }
.statusline.error, .alert.error { border-color: #e4afa9; background: #fff0ee; color: var(--danger); }
.statusline.loading { border-color: #e7d6a8; background: #fff6df; color: #5b4a1b; }
.statusline strong { display: block; margin-bottom: 4px; color: inherit; }
.statusline ul { margin: 6px 0 0; padding-left: 20px; }
.stats-list { display: grid; gap: 8px; margin-top: 12px; }
.stat-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: #fbfcfa; }
.stat-row strong { display: block; }
.stat-row span { color: var(--muted); font-size: 13px; }
.section-title { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.muted { color: var(--muted); }
.module-grid { display: grid; gap: 12px; }
.module-title { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.module-title span { color: var(--muted); font-size: 12px; }
.monitor-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.monitor-card { border: 1px solid var(--line); border-radius: 8px; padding: 16px; background: #fff; box-shadow: var(--shadow); display: grid; gap: 12px; }
.monitor-head { display: flex; justify-content: space-between; gap: 12px; align-items: start; }
.monitor-temp { font-size: clamp(34px, 5vw, 54px); font-weight: 800; letter-spacing: -0.04em; }
.status-dot { width: 42px; height: 42px; border-radius: 999px; border: 1px solid var(--line); display: grid; place-items: center; font-weight: 900; color: #102014; background: var(--pause); }
.status-dot.cooling { background: var(--cool); color: #fff; }
.status-dot.heating { background: var(--heat); color: #fff; }
.status-dot.neutral { background: var(--neutral); color: #fff; }
.status-dot.warning { background: #f2b84b; color: #271b05; }
.monitor-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tile { border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: #fbfcfa; }
.tile span { display: block; color: var(--muted); font-size: 12px; font-weight: 700; margin-bottom: 4px; text-transform: uppercase; }
.tile strong { display: block; font-size: 26px; margin: 6px 0; }
.chart-panel { display: grid; gap: 12px; }
.chart-title { display: flex; justify-content: space-between; gap: 16px; align-items: start; }
.legend { display: flex; gap: 12px; color: var(--muted); font-size: 13px; }
.line { display: inline-block; width: 24px; height: 4px; border-radius: 999px; margin-right: 6px; vertical-align: middle; }
.line.actual { background: var(--cool); }
.line.target { background: var(--target); }
canvas { width: 100%; max-height: 520px; border: 1px solid var(--line); border-radius: 8px; background: linear-gradient(180deg, #fff, #fbfcfa); }
.time-control { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; }
.login-page { display: grid; place-items: center; padding: 24px; }
.login-card { width: min(420px, 100%); padding: 18px; }
.login-card form { display: grid; gap: 14px; }
@media (max-width: 900px) {
  .topbar { display: block; }
  .toolbar { justify-content: flex-start; margin-top: 16px; }
  .layout, .setup-layout, .row, .thirds, .compact-grid, .info-grid, .controls, .grid, .grid.two, .module-grid, .monitor-grid { grid-template-columns: 1fr; }
  .time-control, .chart-title { display: block; }
}
@media (max-width: 680px) {
  .app { width: 100%; padding: max(14px, env(safe-area-inset-top)) 10px max(24px, env(safe-area-inset-bottom)); }
  h1 { font-size: 24px; }
  h2 { font-size: 19px; }
  .toolbar { display: grid; grid-template-columns: 1fr 1fr; }
  .toolbar .btn, .toolbar a, .toolbar button { text-align: center; }
  .panel { padding: 12px; }
  .card summary { padding: 12px; }
  .card-body { padding: 12px; }
  input, select, .btn, button { min-height: 44px; }
}