:root {
  --bg: #ffffff;
  --bg2: #f5f6f5;
  --ink: #111412;
  --ink2: #565c58;
  --line: #e3e6e4;
  --green: #12823c;
  --green-ink: #ffffff;
  --green-soft: #e8f5ec;
  --amber: #a35a00;
  --amber-soft: #fff3e0;
  --red: #c4271b;
  --red-soft: #fdecea;
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d0c;
    --bg2: #151917;
    --ink: #eef1ef;
    --ink2: #a1a8a4;
    --line: #262b28;
    --green: #3ccf6e;
    --green-ink: #06210f;
    --green-soft: #12291a;
    --amber: #f2a541;
    --amber-soft: #2b2010;
    --red: #ff6b5e;
    --red-soft: #321513;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--green); }
code, pre { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 6px 10px; }

.top, main, .foot { max-width: 920px; margin: 0 auto; padding: 0 20px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 18px; padding-bottom: 18px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.top nav { display: flex; gap: 20px; font-size: 15px; }
.top nav a { color: var(--ink2); text-decoration: none; }
.top nav a:hover { color: var(--ink); }

.hero { text-align: center; padding: 64px 0 24px; }
.hero h1 { font-size: clamp(36px, 7vw, 60px); line-height: 1.05; letter-spacing: -0.03em; margin: 0 0 18px; font-weight: 700; }
.lede { font-size: clamp(18px, 2.4vw, 21px); color: var(--ink2); max-width: 680px; margin: 0 auto 32px; }
.check { display: flex; gap: 10px; max-width: 620px; margin: 0 auto; }
.check input {
  flex: 1; min-width: 0; font: inherit; font-size: 18px; padding: 15px 18px;
  border: 1.5px solid var(--line); border-radius: var(--radius); background: var(--bg2); color: var(--ink);
}
.check input:focus { outline: none; border-color: var(--green); background: var(--bg); }
.check button, .watch button {
  font: inherit; font-weight: 600; font-size: 17px; padding: 15px 24px; border: 0; border-radius: var(--radius);
  background: var(--green); color: var(--green-ink); cursor: pointer; white-space: nowrap;
}
.check button:disabled, .watch button:disabled { opacity: 0.6; cursor: default; }
.fine { color: var(--ink2); font-size: 14px; margin-top: 14px; }

.result:empty { display: none; }
.result { max-width: 760px; margin: 24px auto 0; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--bg); }
.result .wait, .result .err { text-align: center; color: var(--ink2); margin: 0; }
.result .err { color: var(--red); }
.head { display: flex; align-items: center; gap: 20px; }
.badge { width: 84px; height: 84px; border-radius: 22px; display: grid; place-items: center; font-size: 46px; font-weight: 750; flex: none; }
.badge.A, .badge.B { background: var(--green-soft); color: var(--green); }
.badge.C { background: var(--amber-soft); color: var(--amber); }
.badge.D, .badge.F { background: var(--red-soft); color: var(--red); }
.head h2 { margin: 0 0 4px; font-size: 24px; letter-spacing: -0.01em; }
.meta { color: var(--ink2); font-size: 14px; margin: 0; }
.ok { margin: 20px 0 0; color: var(--green); font-weight: 600; }

.finding { border-top: 1px solid var(--line); padding: 20px 0 4px; margin-top: 20px; }
.finding h3 { margin: 0 0 6px; font-size: 18px; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.sev { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; padding: 2px 8px; border-radius: 99px; }
.sev.critical, .sev.high { background: var(--red-soft); color: var(--red); }
.sev.medium { background: var(--amber-soft); color: var(--amber); }
.sev.low { background: var(--bg2); color: var(--ink2); }
.finding p { margin: 6px 0; }
.first { background: var(--amber-soft); border-radius: 10px; padding: 10px 14px; }
.prompt { background: var(--bg2); border-radius: 12px; margin: 12px 0; overflow: hidden; }
.prompt .bar { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; font-size: 14px; color: var(--ink2); border-bottom: 1px solid var(--line); }
.prompt pre { margin: 0; padding: 14px; white-space: pre-wrap; word-break: break-word; max-height: 260px; overflow: auto; }
.copy { font: inherit; font-size: 14px; font-weight: 600; padding: 5px 14px; border-radius: 99px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer; }
.next { color: var(--ink2); }
.note { color: var(--ink2); font-size: 15px; margin-top: 20px; }

.watch { margin-top: 24px; padding: 20px; border-radius: 16px; background: var(--green-soft); }
.watch p { margin: 0 0 14px; }

.band { padding: 64px 0 0; }
.band h2 { font-size: clamp(26px, 4vw, 36px); letter-spacing: -0.02em; margin: 0 0 20px; }
.band p { color: var(--ink2); max-width: 720px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; counter-reset: s; }
.steps li, .grid li { background: var(--bg2); border-radius: var(--radius); padding: 20px; display: flex; flex-direction: column; gap: 6px; }
.steps li { counter-increment: s; }
.steps li b::before { content: counter(s) ". "; color: var(--green); }
.steps span, .grid span { color: var(--ink2); font-size: 15px; }
.grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.cmd { background: var(--bg2); border-radius: var(--radius); padding: 16px 18px; overflow-x: auto; }
.promise { padding-bottom: 24px; }

.foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; border-top: 1px solid var(--line); margin-top: 64px; padding-top: 24px; padding-bottom: 40px; color: var(--ink2); font-size: 14px; }

@media (max-width: 560px) {
  .top nav { display: none; }
  .hero { padding-top: 32px; }
  .check { flex-direction: column; }
  .result { padding: 20px; }
  .head { gap: 14px; }
  .badge { width: 64px; height: 64px; font-size: 34px; border-radius: 18px; }
  .head { align-items: flex-start; }
  .head h2 { font-size: 19px; line-height: 1.3; }
  .finding h3 { font-size: 17px; }
}