:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #14171c;
  --muted: #5b6472;
  --border: #e2e5ea;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --pass: #1a7f37;
  --pass-bg: #e8f5ec;
  --warn: #9a6700;
  --warn-bg: #fff6e0;
  --fail: #c62828;
  --fail-bg: #fdecec;
  --code-bg: #f0f2f5;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --surface: #161b22;
    --text: #e6e9ee;
    --muted: #9aa4b2;
    --border: #2a313c;
    --accent: #4c8dff;
    --pass: #4ac26b;
    --pass-bg: #12261a;
    --warn: #e3b341;
    --warn-bg: #2a2210;
    --fail: #ff6b6b;
    --fail-bg: #2c1515;
    --code-bg: #0d1117;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; background: var(--code-bg); padding: 2px 6px; border-radius: 6px; word-break: break-all; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.top, main, .foot { max-width: 920px; margin: 0 auto; padding: 0 16px; }

.top { display: flex; align-items: center; gap: 12px; padding-top: 20px; padding-bottom: 20px; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
.tag { font-size: 0.8rem; color: var(--muted); border: 1px solid var(--border); padding: 2px 10px; border-radius: 999px; }

.hero { padding: 32px 0 16px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.02em; }
.lede { color: var(--muted); margin: 0 0 24px; max-width: 640px; }

.scan { display: flex; gap: 8px; }
.scan input {
  flex: 1; min-width: 0;
  font: inherit; padding: 14px 16px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); color: var(--text);
}
.scan input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.scan button {
  font: inherit; font-weight: 600; padding: 14px 26px;
  border: 0; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-text); cursor: pointer;
}
.scan button:disabled { opacity: 0.6; cursor: wait; }
.fine { font-size: 0.85rem; color: var(--muted); margin-top: 10px; }

.status { padding: 12px 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.status.error { color: var(--fail); background: var(--fail-bg); border-color: transparent; }

#results { padding: 16px 0 40px; }

.summary {
  display: flex; gap: 24px; align-items: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px;
}
.grade {
  flex: none; width: 110px; height: 110px; border-radius: 20px;
  display: grid; place-items: center;
  font-size: 3rem; font-weight: 800; color: #fff;
}
.g-aplus, .g-a { background: #1a7f37; }
.g-b { background: #5a9e2f; }
.g-c { background: #c69500; }
.g-d { background: #d9730d; }
.g-e, .g-f { background: #c62828; }

.meta { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; margin: 0; min-width: 0; }
.meta dt { color: var(--muted); font-size: 0.9rem; }
.meta dd { margin: 0; word-break: break-all; }

.notes { display: grid; gap: 8px; margin-top: 16px; }
.note { padding: 12px 16px; border-radius: var(--radius); border-left: 4px solid; }
.note p { margin: 4px 0 0; }
.note.bad { background: var(--fail-bg); border-color: var(--fail); }
.note.warn { background: var(--warn-bg); border-color: var(--warn); }
.note.info { background: var(--surface); border-color: var(--border); }

h2 { margin: 32px 0 12px; font-size: 1.3rem; }

.checks { display: grid; gap: 12px; }
.check { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.check-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.check h3 { margin: 0; font-size: 1.05rem; }
.check p { margin: 8px 0 0; }
.about { color: var(--muted); }
.problem { font-weight: 500; }
.k { color: var(--muted); font-size: 0.9rem; }
.points { font-size: 0.8rem; color: var(--muted); }

.pill { flex: none; font-size: 0.8rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.pill.pass { color: var(--pass); background: var(--pass-bg); }
.pill.warn { color: var(--warn); background: var(--warn-bg); }
.pill.fail { color: var(--fail); background: var(--fail-bg); }
.check.fail { border-left: 4px solid var(--fail); }
.check.warn { border-left: 4px solid var(--warn); }
.check.pass { border-left: 4px solid var(--pass); }

.sub { color: var(--muted); margin: -4px 0 12px; }

.plain { margin-top: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.plain-title { margin: 0 0 8px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.headline { font-size: 1.2rem; font-weight: 600; margin: 0 0 8px; }
.points-list { margin: 0 0 12px; padding-left: 20px; }
.plain h3 { font-size: 1rem; margin: 12px 0 6px; }
.fixes { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
.effort { color: var(--muted); margin: 12px 0 0; }
.ai-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 16px; }
.secondary {
  font: inherit; font-weight: 600; padding: 10px 18px; cursor: pointer;
  border: 1px solid var(--accent); border-radius: var(--radius); background: transparent; color: var(--accent);
}
.ai-hint { font-size: 0.85rem; color: var(--muted); }
.copy-status { margin: 8px 0 0; font-size: 0.9rem; color: var(--pass); min-height: 1em; }
.pill.info { color: var(--muted); background: var(--code-bg); }
.check.info { border-left: 4px solid var(--border); }

.lead { margin-top: 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.lead h2 { margin-top: 0; }
.lead-form { display: grid; gap: 12px; }
.lead-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.lead-form label { display: grid; gap: 4px; font-size: 0.9rem; font-weight: 500; }
.lead-form input[type="text"], .lead-form input[type="email"], .lead-form input[type="tel"], .lead-form textarea {
  font: inherit; font-weight: 400; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); width: 100%;
}
.lead-form textarea { resize: vertical; }
.lead-form input:focus, .lead-form textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.lead-form .check-row { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
.lead-form .check-row input { margin-top: 4px; }
.lead-form button {
  justify-self: start; font: inherit; font-weight: 600; padding: 12px 22px;
  border: 0; border-radius: var(--radius); background: var(--accent); color: var(--accent-text); cursor: pointer;
}
.lead-form button:disabled { opacity: 0.6; cursor: wait; }
.opt { color: var(--muted); font-weight: 400; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.lead-status { margin: 0; }
.lead-status.ok { color: var(--pass); }
.lead-status.error { color: var(--fail); }
.fix code { white-space: pre-wrap; }

.raw { margin-top: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; }
.raw summary { cursor: pointer; font-weight: 600; }
.raw table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 0.88rem; table-layout: fixed; }
.raw th, .raw td { text-align: left; padding: 6px 8px; border-top: 1px solid var(--border); vertical-align: top; word-break: break-all; }
.raw th:first-child { width: 34%; }
.hname { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.foot { color: var(--muted); font-size: 0.85rem; padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--border); }

@media (max-width: 600px) {
  .scan { flex-direction: column; }
  .lead-form .row { grid-template-columns: 1fr; }
  .summary { flex-direction: column; align-items: flex-start; }
  .grade { width: 84px; height: 84px; font-size: 2.3rem; }
}