/* Layout: one column of cards, bottom tab bar (thumb reach on a phone). */
:root {
  --bg: #f4f6f3;
  --surface: #ffffff;
  --fg: #17211b;
  --muted: #5d6b62;
  --line: #dde4de;
  --accent: #14532d;
  --go: #15803d;
  --go-bg: #e7f6ec;
  --warn: #a15c00;
  --warn-bg: #fff4e0;
  --stop: #b42318;
  --stop-bg: #fdecea;
  --none: #5d6b62;
  --none-bg: #eef1ee;
  --s1: #2a78d6;
  --s2: #eb6834;
  --s3: #1baf7a;
  --band: rgba(93, 107, 98, 0.18);
  --grid: #e7ece8;
  --font: "Segoe UI", Roboto, system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1511;
    --surface: #18211b;
    --fg: #e8efe9;
    --muted: #9fb0a5;
    --line: #2b382f;
    --accent: #6fcf97;
    --go: #4ade80;
    --go-bg: #153222;
    --warn: #fbbf24;
    --warn-bg: #3a2c0d;
    --stop: #f87171;
    --stop-bg: #3b1715;
    --none: #9fb0a5;
    --none-bg: #222c25;
    --s1: #3987e5;
    --s2: #d95926;
    --s3: #199e70;
    --band: rgba(159, 176, 165, 0.20);
    --grid: #26322a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 var(--font);
  padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: max(12px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) 4px max(16px, env(safe-area-inset-left, 0px));
}
h1 { font-size: 1.35rem; margin: 0; letter-spacing: 0.01em; }
h2 { font-size: 1rem; margin: 0 0 8px; }
main { padding: 8px max(16px, env(safe-area-inset-right, 0px)) 16px max(16px, env(safe-area-inset-left, 0px)); max-width: 640px; margin: 0 auto; }
.view { display: grid; gap: 12px; }
[hidden] { display: none !important; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  min-width: 0;
}
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.lead { margin: 0 0 8px; }
.eyebrow { margin: 0; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }

.verdict { border-width: 2px; }
.verdict-label { font-size: 2rem; font-weight: 750; margin: 2px 0 4px; letter-spacing: 0.02em; }
.verdict-text { margin: 0 0 6px; }
.verdict[data-level="train"] { border-color: var(--go); background: var(--go-bg); }
.verdict[data-level="train"] .verdict-label { color: var(--go); }
.verdict[data-level="easy"] { border-color: var(--warn); background: var(--warn-bg); }
.verdict[data-level="easy"] .verdict-label { color: var(--warn); }
.verdict[data-level="rest"] { border-color: var(--stop); background: var(--stop-bg); }
.verdict[data-level="rest"] .verdict-label { color: var(--stop); }
.verdict[data-level="unknown"] { border-color: var(--line); background: var(--none-bg); }
.reasons { margin: 4px 0; padding-left: 20px; }

.block { border-top: 1px solid var(--line); padding: 10px 0; }
.block:first-child { border-top: 0; padding-top: 0; }
.block-title { font-weight: 650; margin: 0; }
.block-meta { margin: 2px 0 6px; color: var(--muted); font-size: 0.9rem; }
.targets { font-family: var(--mono); font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.advice { margin: 8px 0 0; padding: 8px 10px; border-radius: 10px; background: var(--none-bg); }
.advice strong { display: block; }
.advice[data-action="keep"] { background: var(--go-bg); }
.advice[data-action="move"], .advice[data-action="replace"] { background: var(--warn-bg); }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px; }
.tile { border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; min-width: 0; }
.tile-label { margin: 0; font-size: 0.78rem; color: var(--muted); }
.tile-value { margin: 2px 0 0; font-size: 1.25rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.tile-note { margin: 0; font-size: 0.78rem; color: var(--muted); }

.checklist { margin: 6px 0 0; padding-left: 20px; }
.door[data-open="true"] { border-color: var(--go); }

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 92px 1fr; gap: 8px; padding: 8px 0; border-top: 1px solid var(--line); }
.timeline li:first-child { border-top: 0; }
.day { color: var(--muted); font-size: 0.85rem; }
.status { display: inline-block; margin-top: 2px; padding: 1px 8px; border-radius: 999px; font-size: 0.78rem; background: var(--none-bg); color: var(--fg); }
.status[data-tone="good"] { background: var(--go-bg); color: var(--go); }
.status[data-tone="warn"] { background: var(--warn-bg); color: var(--warn); }
.status[data-tone="bad"] { background: var(--stop-bg); color: var(--stop); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chip { background: var(--none-bg); color: var(--fg); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 0.85rem; }
.chat { display: grid; gap: 8px; margin: 8px 0; }
.msg { margin: 0; padding: 8px 12px; border-radius: 12px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { background: var(--go-bg); justify-self: end; max-width: 90%; }
.msg.assistant { background: var(--none-bg); max-width: 100%; }
.msg.error { background: var(--stop-bg); color: var(--stop); }
.ask { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
textarea, input, select {
  width: 100%; font: inherit; color: var(--fg); background: var(--surface);
  border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px;
}
button {
  font: inherit; border: 0; border-radius: 10px; padding: 8px 14px;
  background: var(--accent); color: var(--surface); cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: default; }
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
button.danger { color: var(--stop); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.settings fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 10px 0; padding: 8px 12px 12px; display: grid; gap: 4px; }
.settings label { font-size: 0.85rem; color: var(--muted); margin-top: 6px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.banner { margin: 4px max(16px, env(safe-area-inset-right, 0px)) 0 max(16px, env(safe-area-inset-left, 0px)); padding: 8px 12px; border-radius: 10px; background: var(--warn-bg); color: var(--fg); }
.banner[data-tone="error"] { background: var(--stop-bg); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.tabs {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  background: var(--surface); border-top: 1px solid var(--line);
  padding: 6px max(8px, env(safe-area-inset-right, 0px)) calc(6px + env(safe-area-inset-bottom, 0px)) max(8px, env(safe-area-inset-left, 0px));
}
.tabs button { background: transparent; color: var(--muted); padding: 10px 2px; font-size: 0.8rem; }
.tabs button[aria-selected="true"] { color: var(--accent); font-weight: 650; }
@media (prefers-reduced-motion: no-preference) { button { transition: opacity 0.15s; } }

/* Charts: one y-axis each; colours by role so both themes swap here. */
.range { display: flex; gap: 6px; }
.range button[aria-pressed="true"] { background: var(--accent); color: var(--surface); }
.chart h2 { margin-bottom: 4px; }
.plot { position: relative; min-width: 0; }
.plot svg { display: block; width: 100%; height: auto; touch-action: pan-y; }
.legend { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0 0 6px; padding: 0; font-size: 0.8rem; color: var(--muted); }
.legend li { display: flex; align-items: center; gap: 6px; }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; }
.swatch.line { height: 3px; border-radius: 2px; }
.swatch.s1 { background: var(--s1); }
.swatch.s2 { background: var(--s2); }
.swatch.s3 { background: var(--s3); }
.swatch.band { background: var(--band); border: 1px solid var(--line); }
.swatch.goal { height: 0; border-top: 2px dashed var(--muted); border-radius: 0; }
.grid { stroke: var(--grid); stroke-width: 1; }
.axis-label { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.bar.s1 { fill: var(--s1); }
.line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.line.s1 { stroke: var(--s1); }
.line.s2 { stroke: var(--s2); }
.line.s3 { stroke: var(--s3); }
.dot { stroke: var(--surface); stroke-width: 2; }
.dot.s1 { fill: var(--s1); }
.dot.s2 { fill: var(--s2); }
.dot.s3 { fill: var(--s3); }
.band { fill: var(--band); }
.goal { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 5 4; }
.crosshair { stroke: var(--muted); stroke-width: 1; }
.hit { fill: transparent; cursor: crosshair; }
.tooltip {
  position: absolute; top: 4px; left: 0; z-index: 2; pointer-events: none;
  background: var(--surface); color: var(--fg); border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 8px; font-size: 0.8rem; font-variant-numeric: tabular-nums; white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
details summary { cursor: pointer; color: var(--muted); font-size: 0.85rem; margin-top: 6px; }
.table-wrap { overflow-x: auto; max-height: 260px; }
table { border-collapse: collapse; font-size: 0.8rem; font-variant-numeric: tabular-nums; width: 100%; }
th, td { text-align: right; padding: 3px 6px; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }