:root {
  --ink: #151515;
  --muted: #646464;
  --canvas: #ffffff;
  --surface: #f4f5f7;
  --line: #dedede;
  --action: #0064e0;
  --action-hover: #0056c2;
  --on-action: #ffffff;
  --error: #b0393f;
  --error-bg: #fcf0ef;
  --ok: #1d7a4f;
  --ok-bg: #e9f6ef;
  --radius: 14px;
  --max: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #f5f5f5;
    --muted: #adadad;
    --canvas: #000000;
    --surface: #121212;
    --line: #303030;
    --action: #0064e0;
    --action-hover: #0056c2;
    --error: #ff9b9f;
    --error-bg: #3c2528;
    --ok: #7fd4a8;
    --ok-bg: #16301f;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a { color: var(--action); }
a:hover { color: var(--action-hover); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small { font-weight: 400; color: var(--muted); font-size: 14px; }

.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 72px;
}

.hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.lede { font-size: 19px; color: var(--muted); margin: 0 0 8px; max-width: 34em; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.card h2 { margin: 0 0 6px; font-size: 22px; }
.card p.hint { margin: 0 0 20px; color: var(--muted); font-size: 15px; }

.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.field input {
  width: 100%;
  font: inherit;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--canvas);
  color: var(--ink);
}
.field input:focus { outline: 2px solid var(--action); outline-offset: 1px; border-color: transparent; }
.field input[aria-invalid="true"] { border-color: var(--error); }
.err { color: var(--error); font-size: 14px; margin-top: 4px; }
.err:empty { display: none; }
#consent-err { margin: -10px 0 14px; }

.trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--muted); margin: 6px 0 18px; }
.consent input { margin-top: 3px; width: 18px; height: 18px; flex: none; }

button.primary {
  width: 100%;
  font: inherit;
  font-weight: 600;
  padding: 13px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--action);
  color: var(--on-action);
  cursor: pointer;
}
button.primary:hover { background: var(--action-hover); }
button.primary:disabled { opacity: 0.6; cursor: progress; }

.notice { border-radius: 10px; padding: 12px 14px; font-size: 15px; margin-top: 14px; }
.notice.ok { background: var(--ok-bg); color: var(--ok); }
.notice.bad { background: var(--error-bg); color: var(--error); }

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 0 0 72px;
}
.features h3 { margin: 0 0 8px; font-size: 18px; }
.features p { margin: 0; color: var(--muted); font-size: 16px; }

footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
footer .wrap { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }
footer a { color: var(--muted); }

.doc { max-width: 760px; padding: 24px 0 64px; }
.doc h1 { font-size: 36px; line-height: 1.15; margin: 8px 0 6px; }
.doc h2 { font-size: 22px; margin: 36px 0 10px; }
.doc h3 { font-size: 18px; margin: 22px 0 8px; }
.doc .meta { color: var(--muted); margin: 0 0 24px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0 16px; }
.doc th, .doc td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 10px 8px; }
.doc th { font-size: 14px; color: var(--muted); font-weight: 600; }
.doc .table-scroll { overflow-x: auto; }

noscript p { color: var(--error); }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding: 32px 0 48px; }
  .features { grid-template-columns: 1fr; }
}