:root {
  --blue: #1e3a5c;
  --blue-2: #2a4a73;
  --pencil: #d8dce0;
  --paper: #f4f6f8;
  --stamp: #b91c1c;
  --mute: #5c6570;
  --display: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 70px; }
body {
  margin: 0;
  color: var(--blue);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--stamp); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
.qa-grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.14;
  background-image: url("images/texture.webp");
  background-size: 280px auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--blue); color: #fff; padding: 8px; }
.qa-mast {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: rgba(244, 246, 248, 0.94);
  border-bottom: 3px solid var(--stamp);
  backdrop-filter: blur(8px);
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
}
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--mute);
}
.nav-toggle {
  display: none;
  background: var(--blue);
  color: #fff;
  border: 0;
  padding: 8px 14px;
  letter-spacing: 0.1em;
}
.qa-links { display: flex; flex-wrap: wrap; gap: 14px 18px; align-items: center; }
.qa-links a { font-size: 13px; color: var(--mute); }
.qa-links a.is-active { color: var(--stamp); }
.qa-links .live {
  color: #fff;
  background: var(--stamp);
  padding: 6px 12px;
}
.form-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  min-height: 86vh;
  background: var(--pencil);
}
.form-hero figure { margin: 0; overflow: hidden; }
.form-hero img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
.form-hero .copy { padding: 56px 40px; align-self: center; }
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stamp);
  margin: 0 0 10px;
}
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.15; margin: 0 0 12px; }
h1 { font-size: clamp(36px, 5.4vw, 56px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 18px; }
.lead { font-size: 17px; max-width: 38em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--blue);
  font-size: 14px;
}
.btn.blue { background: var(--blue); color: #fff; }
.btn.ghost { background: transparent; color: var(--blue); }
.w { width: min(1080px, calc(100% - 48px)); margin: 0 auto; padding: 64px 0; }
.tri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.tri article {
  background: #fff;
  border: 1px solid rgba(30, 58, 92, 0.16);
  border-left: 6px solid var(--blue);
  padding: 18px 16px;
}
.tri ul { margin: 0; padding-left: 18px; }
.steps { list-style: none; margin: 28px 0; padding: 0; }
.steps li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  column-gap: 14px;
  padding: 16px 0;
  border-top: 1px solid rgba(30, 58, 92, 0.12);
}
.steps li span { font-family: var(--mono); color: var(--stamp); font-size: 13px; }
.steps li strong { display: block; font-family: var(--display); font-size: 20px; margin-bottom: 4px; }
.steps li p { margin: 0; }
.side { margin: 32px 0 0; }
.side figcaption { font-size: 13px; color: var(--mute); margin-top: 8px; }
#lock { background: #e8edf2; }
.bench {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}
.form-card {
  background: #fff;
  border: 1px solid rgba(30, 58, 92, 0.2);
  padding: 22px 20px;
  background-image: linear-gradient(90deg, var(--stamp) 0 8px, transparent 8px);
}
.form-card.is-ok { box-shadow: inset 0 0 0 2px var(--stamp); }
.n {
  font-family: var(--mono);
  font-size: 36px;
  margin: 4px 0 12px;
}
#lock-state { min-height: 2.6em; }
#lock-state.is-ok { color: var(--blue); }
#lock-state.is-no { color: var(--stamp); }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.pin-tray { background: #fff; padding: 12px; border: 1px solid rgba(30, 58, 92, 0.16); }
.pin-tray img { width: 100%; height: 220px; object-fit: cover; }
.hint { font-size: 13px; color: var(--mute); }
.lines { margin: 0; padding-left: 18px; }
.lines li { margin: 8px 0; }
footer {
  padding: 28px 24px 48px;
  border-top: 3px solid var(--stamp);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}
@media (max-width: 880px) {
  .form-hero, .tri, .bench { grid-template-columns: 1fr; }
  .form-hero img { height: 240px; min-height: 240px; }
  .nav-toggle { display: inline-block; }
  .qa-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--paper);
    padding: 12px 20px 20px;
    border-bottom: 3px solid var(--stamp);
  }
  .qa-links.open { display: flex; }
  .form-hero .copy { padding: 32px 20px 48px; }
  .w { width: min(1080px, calc(100% - 32px)); padding: 48px 0; }
  h1 { font-size: 32px; }
}