/* ============================================================
   Sensor Board — theme.
   Everything visual is driven by the CSS custom properties below,
   so restyling (or per-deployment branding) means editing this block.
   Palette values are the validated data-viz defaults (light + dark).
   ============================================================ */
:root {
  --surface-0: #f4f4f2;   /* page background */
  --surface-1: #fcfcfb;   /* cards / chart surface */
  --border:    #e3e3df;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #8a897f;

  --series-1: #2a78d6;    /* primary chart hue (blue) */
  --good:     #0ca30c;
  --warning:  #fab219;
  --critical: #d03b3b;

  --radius: 12px;
  --gap: 16px;
  --maxw: 1100px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-0: #121211;
    --surface-1: #1a1a19;
    --border:    #2e2e2b;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #86857b;
    --series-1: #3987e5;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--surface-0);
  color: var(--text-primary);
  line-height: 1.5;
}

a { color: var(--series-1); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text-primary); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 24px 20px 64px; }

h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 32px 0 12px; color: var(--text-secondary); font-weight: 600; }

.muted { color: var(--text-muted); }
.mono  { font-family: var(--mono); font-size: 0.85em; color: var(--text-secondary); }

.crumbs { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; }
.crumbs span { color: var(--text-secondary); }

/* --- card grids (overview / project) --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--gap);
}
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.link-card { display: block; color: inherit; }
.link-card:hover { border-color: var(--series-1); text-decoration: none; }
.card-title { font-weight: 600; margin-bottom: 4px; }
.card-meta  { font-size: 0.85rem; color: var(--text-secondary); }

/* --- device page --- */
.device-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.range-control { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.range-control button {
  border: 0;
  background: var(--surface-1);
  color: var(--text-secondary);
  padding: 7px 14px;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.range-control button + button { border-left: 1px solid var(--border); }
.range-control button.active { background: var(--series-1); color: #fff; }

/* --- quick overview: last value per sensor --- */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--gap);
  margin-bottom: 24px;
}
.stat {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  /* Column + margin-top:auto on the figure keeps every number on the same
     line even when one tile's label wraps and its neighbours' do not. */
  display: flex;
  flex-direction: column;
}
.stat-figure { margin-top: auto; }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; }
.stat-value { font-size: 1.35rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.stat-value--sm { font-size: 0.95rem; font-weight: 600; }

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--gap);
}
.panel {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 8px;
}
.panel-head { display: flex; align-items: baseline; justify-content: space-between; }
.panel-title { font-weight: 600; font-size: 0.95rem; }
.panel-latest { font-variant-numeric: tabular-nums; color: var(--text-secondary); font-size: 0.9rem; }
.panel-chart { width: 100%; height: 200px; }
.panel.gauge .panel-chart { height: 180px; }

/* ============================================================
   Main page (/) — landing, docs, and the two generators.
   Everything below is scoped to elements that appear only there,
   so the dashboard styling above is untouched.
   ============================================================ */

.header-nav { display: flex; gap: 18px; font-size: 0.9rem; }
.header-nav a { color: var(--text-secondary); }

.hero { padding: 8px 0 4px; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.2; max-width: 20ch; }
.hero-lede { max-width: 60ch; color: var(--text-secondary); }

/* The workflow line. Wraps to two rows on a phone rather than scrolling. */
.hero-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 18px 0;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.hero-flow span { background: var(--surface-1); border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }
.hero-flow .arrow { background: none; border: none; padding: 0; color: var(--text-muted); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

.button {
  display: inline-block;
  background: var(--series-1);
  color: #fff;
  border: 1px solid var(--series-1);
  border-radius: 8px;
  padding: 9px 16px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.button:hover { filter: brightness(1.08); text-decoration: none; }
.button--quiet { background: var(--surface-1); color: var(--text-primary); border-color: var(--border); }
.button--small { padding: 7px 12px; font-size: 0.85rem; }
.button.is-done { background: var(--good); border-color: var(--good); color: #fff; }

.notice {
  border: 1px solid var(--border);
  border-left: 3px solid var(--warning);
  background: var(--surface-1);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 28px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.notice strong { color: var(--text-primary); }
.notice--inline { margin: 14px 0 0; font-size: 0.85rem; }

.small { font-size: 0.85rem; }

.generator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap);
  margin-top: 16px;
}
.generator { padding: 16px; }
.generator h3 { margin: 0 0 6px; font-size: 1rem; }
.generator-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.generator-row input {
  flex: 1 1 100%;
  min-width: 0;               /* lets a long key shrink instead of overflowing */
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-0);
  color: var(--text-primary);
}

/* --- code examples --- */
.code-block { margin: 0 0 18px; }
.code-block figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 12px 8px 16px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.code-block .code { border-radius: 0 0 var(--radius) var(--radius); }

/* A value substituted from a generator, so it is obvious what changed and
   which parts of the snippet are yours. */
[data-field] { color: var(--text-muted); }
[data-field].is-filled {
  color: var(--series-1);
  font-weight: 600;
  background: color-mix(in srgb, var(--series-1) 12%, transparent);
  border-radius: 3px;
  padding: 0 2px;
}

.generate-all { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 20px 0 4px; }

/* Code blocks scroll on their own so the page body never does. */
.code {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
}
.code code { white-space: pre; }
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
}
.code code { background: none; border: none; padding: 0; }

.prose-list { max-width: 72ch; padding-left: 20px; color: var(--text-secondary); }
.prose-list li { margin-bottom: 10px; }
.prose-list strong { color: var(--text-primary); }

.table-scroll { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.data-table th { font-size: 0.8rem; color: var(--text-secondary); font-weight: 600; }
.data-table tr:last-child td { border-bottom: none; }

.stat-sub { font-size: 0.78rem; margin-top: 2px; }

/* The main page's three totals carry a second line each, so they need more
   room than the dashboard's narrow latest-value tiles. */
.overview-grid--totals { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.page-footer {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Expiry warning on a device page (§17): amber once the window is nearly up. */
.expiry-warning { color: var(--warning); }