/* Layout concept: a truck diagnostic panel. One column, each block reads like an instrument with warning segments. */
:root {
  color-scheme: dark;
  --ink: #0b0b0c;
  --panel: #17181a;
  --panel-2: #222427;
  --line: #34373b;
  --text: #f6f5f2;
  --muted: #a9acb0;
  --orange: #ff6a13;
  --orange-soft: rgba(255, 106, 19, 0.14);
  --ok: #e9e8e4;
  --display: "Unbounded", "Arial Black", Impact, sans-serif;
  --body: "Manrope", "Segoe UI", Arial, sans-serif;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
html { background: var(--ink); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--text);
  font: 400 16px/1.55 var(--body);
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
#app { max-width: 560px; margin: 0 auto; padding-block: 18px 40px; display: grid; gap: 24px; }
h1, h2, h3, p, ul, ol { margin: 0; }
h1, h2 { font-family: var(--display); font-weight: 800; line-height: 1.12; text-wrap: balance; }
h1 { font-size: clamp(30px, 8.6vw, 44px); }
h2 { font-size: clamp(23px, 6.4vw, 30px); }
h3 { font: 800 13px/1.3 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
button, input, textarea { font: inherit; color: inherit; }
a { color: var(--text); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

.brand { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 28px; }
.brand b { font: 800 14px/1 var(--display); letter-spacing: .04em; white-space: nowrap; }
.brand b i { font-style: normal; color: var(--orange); }
.brand span { font: 500 11.5px/1 var(--mono); color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }
.stack { display: grid; gap: 14px; }
.lead { font-size: 17.5px; color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
.eyebrow { font: 700 12px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--orange); }

.btn {
  display: block; width: 100%; min-height: 58px; padding: 16px 18px; border: 0; border-radius: 4px;
  background: var(--orange); color: #120700; font: 800 14px/1.25 var(--display); letter-spacing: .02em;
  text-align: center; text-decoration: none; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); font-family: var(--body); font-size: 15px; font-weight: 700; }
.link { background: none; border: 0; padding: 6px 0; color: var(--muted); text-decoration: underline; cursor: pointer; font-size: 14px; }

.pains { list-style: none; padding: 0; display: grid; gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
.pains li { background: var(--ink); padding: 13px 0; font-weight: 600; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; font: 500 12px/1.35 var(--mono); color: var(--muted); }
.facts b { display: block; color: var(--text); font-size: 17px; font-family: var(--display); margin-bottom: 3px; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 16px; display: grid; gap: 13px; }
.gauge { display: grid; gap: 6px; }
.gauge-top { display: flex; justify-content: space-between; gap: 10px; font: 700 12px/1.2 var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.gauge-top em { font-style: normal; color: var(--muted); }
.gauge.low .gauge-top em { color: var(--orange); }
.segments { display: grid; grid-template-columns: repeat(10, 1fr); gap: 3px; }
.segments i { height: 9px; background: var(--panel-2); }
.segments i.on { background: var(--ok); }
.gauge.low .segments i.on { background: var(--orange); }
.sample { font: 500 11px/1 var(--mono); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }

.progress { display: grid; gap: 8px; }
.progress-top { display: flex; justify-content: space-between; gap: 10px; font: 600 12px/1.3 var(--mono); color: var(--muted); }
.progress-top b { color: var(--orange); font-weight: 700; }
.bar { height: 5px; background: var(--panel-2); }
.bar i { display: block; height: 100%; background: var(--orange); transition: width .18s ease-out; }
.question { font: 700 clamp(21px, 5.6vw, 26px)/1.28 var(--body); text-wrap: pretty; }
.options { display: grid; gap: 9px; }
.option {
  width: 100%; min-height: 56px; padding: 14px 15px; text-align: left; background: var(--panel); border: 1px solid var(--line);
  border-radius: 4px; cursor: pointer; font-weight: 600; line-height: 1.35; display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center;
}
.option:hover { border-color: var(--muted); }
.option.selected { border-color: var(--orange); background: var(--orange-soft); }
.option.selected::after { content: ""; width: 10px; height: 10px; background: var(--orange); }

.status { border-left: 4px solid var(--orange); padding: 4px 0 4px 14px; display: grid; gap: 5px; }
.status.fine { border-color: var(--ok); }
.status strong { font: 800 clamp(19px, 5.4vw, 24px)/1.2 var(--display); }
.finding { background: var(--orange-soft); border: 1px solid var(--orange); border-radius: 6px; padding: 16px; display: grid; gap: 8px; }
.finding .eyebrow { color: var(--orange); }
.finding p { font-size: 18px; font-weight: 700; line-height: 1.38; }
.section { display: grid; gap: 10px; border-top: 1px solid var(--line); padding-top: 16px; }
.list { padding: 0; list-style: none; display: grid; gap: 9px; }
.list li { position: relative; padding-left: 18px; }
.list li::before { content: ""; position: absolute; left: 0; top: .62em; width: 8px; height: 3px; background: var(--orange); }
.evidence { display: grid; gap: 8px; }
.evidence div { display: grid; gap: 1px; }
.evidence dt, .evidence span { font: 600 11.5px/1.3 var(--mono); color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
.evidence b { font-weight: 600; }
.call { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 18px 16px; display: grid; gap: 14px; }
.call p.pitch { font-size: 18px; font-weight: 700; line-height: 1.38; }

form { display: grid; gap: 14px; }
label.field { display: grid; gap: 6px; font-weight: 700; font-size: 14px; }
label.field small { color: var(--muted); font-weight: 500; }
input[type="text"], textarea {
  width: 100%; min-height: 52px; background: var(--panel); border: 1px solid var(--line); border-radius: 4px; padding: 13px 14px; font-weight: 500; font-size: 16px;
}
textarea { min-height: 88px; resize: vertical; }
.check { display: grid; grid-template-columns: 24px 1fr; gap: 10px; align-items: start; font-size: 14px; }
.check input { width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--orange); }
.error { color: var(--orange); font-size: 14px; font-weight: 700; }
.steps { list-style: none; padding: 0; counter-reset: s; display: grid; gap: 14px; }
.steps > li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: start; }
.steps > li::before { content: counter(s); font: 800 16px/34px var(--display); width: 34px; height: 34px; text-align: center; background: var(--panel-2); }
.steps > li > div { display: grid; gap: 10px; min-width: 0; }
pre.message { margin: 0; max-height: 180px; overflow: auto; background: var(--panel); border: 1px solid var(--line); padding: 12px; font: 500 12px/1.45 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.footer { display: grid; gap: 6px; padding-top: 6px; color: var(--muted); font-size: 12.5px; }
.footer button { justify-self: start; font-size: 12.5px; }
@media (prefers-reduced-motion: reduce) { .bar i { transition: none; } }