:root {
  --air: #163a6b;
  --air-2: #1f4f8c;
  --mist: #d7e4f2;
  --kraft: #c4a574;
  --kraft-2: #8a6a3c;
  --paper: #f3ead6;
  --ink: #1a2430;
  --mute: #5c6570;
  --cancel: #b94a3c;
  --stripe-r: #c45c48;
  --stripe-b: #1a4a8a;
  --display: "Fraunces", "Songti SC", 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: 76px; }
body {
  margin: 0;
  color: var(--ink);
  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(--air-2); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
.kraft-grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.12;
  background-image: url("images/texture.webp");
  background-size: 280px auto;
  mix-blend-mode: multiply;
}
.air-bar {
  height: 10px;
  background: repeating-linear-gradient(
    135deg,
    var(--stripe-r) 0 10px,
    var(--stripe-b) 10px 20px,
    #f4ead6 20px 28px
  );
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--air); color: #fff; padding: 8px; }
.mast {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: rgba(243, 234, 214, 0.94);
  border-bottom: 1px solid rgba(26, 54, 107, 0.18);
  backdrop-filter: blur(8px);
}
.mark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
}
.mark small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--mute);
}
.nav-toggle {
  display: none;
  background: var(--air);
  color: var(--paper);
  border: 0;
  padding: 8px 14px;
  letter-spacing: 0.12em;
}
.stamp-links { display: flex; flex-wrap: wrap; gap: 14px 18px; align-items: center; }
.stamp-links a { font-size: 13px; color: var(--mute); }
.stamp-links a.is-active { color: var(--air); }
.stamp-links .live {
  color: var(--paper);
  background: var(--air);
  padding: 6px 12px;
}
.desk {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  min-height: 86vh;
  background:
    radial-gradient(ellipse at 12% 80%, rgba(22, 58, 107, 0.12), transparent 46%),
    var(--paper);
}
.desk figure { margin: 0; overflow: hidden; }
.desk img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
.desk .copy { padding: 56px 40px; align-self: center; }
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--air-2);
  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(40px, 6vw, 68px); }
h2 { font-size: clamp(26px, 3.4vw, 38px); }
h3 { font-size: 20px; }
.lead { font-size: 18px; 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(--air);
  font-size: 14px;
}
.btn.ink { background: var(--air); color: var(--paper); }
.btn.ghost { background: transparent; color: var(--air); }
.w { width: min(1080px, calc(100% - 48px)); margin: 0 auto; padding: 64px 0; }
.tri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.tri article {
  background: #fff8ee;
  border: 1px solid rgba(138, 106, 60, 0.35);
  padding: 20px 18px;
  box-shadow: 4px 6px 0 rgba(22, 58, 107, 0.06);
}
.tri ul { margin: 0; padding-left: 18px; }
.steps { list-style: none; margin: 28px 0; padding: 0; }
.steps li {
  display: grid;
  grid-template-columns: 52px 1fr;
  column-gap: 14px;
  padding: 16px 0;
  border-top: 1px dashed rgba(22, 58, 107, 0.25);
}
.steps li span {
  font-family: var(--mono);
  color: var(--air);
  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; }
#stamp { background: #e7eef6; }
.bench {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}
.post-card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 340px;
  background: #f7f1e4;
  border: 1px solid #cbb896;
  box-shadow: 0 18px 40px rgba(26, 36, 48, 0.12);
  background-image:
    linear-gradient(90deg, transparent 49.6%, #cbb896 49.6% 50.4%, transparent 50.4%),
    linear-gradient(#cbb896, #cbb896);
  background-size: 100% 100%, 100% 1px;
  background-position: 0 0, 0 50%;
  background-repeat: no-repeat;
}
.post-card.stamped { outline: 2px solid var(--air); }
.quad { padding: 18px 16px 48px; }
.quad span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--air);
}
.quad p { margin: 8px 0 0; font-size: 14px; }
.cancel-ring {
  position: absolute;
  right: 18px;
  top: 18px;
  width: 92px;
  height: 92px;
  border: 3px solid var(--air);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--air);
  transform: rotate(-18deg);
  background: rgba(243, 234, 214, 0.55);
}
.cancel-ring[hidden] { display: none; }
.pin-tray {
  background: #fff8ee;
  border: 1px solid rgba(138, 106, 60, 0.4);
  padding: 16px;
}
.pin-tray img { width: 100%; height: 180px; object-fit: cover; margin-bottom: 12px; }
.mono {
  font-family: var(--mono);
  font-size: 14px;
  margin: 0 0 12px;
}
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.hint { font-size: 12px; color: var(--mute); margin: 12px 0 0; }
#stamp-state.is-ok { color: var(--air); }
#stamp-state.is-no { color: var(--cancel); }
.lines { margin: 0; padding-left: 18px; }
.lines li { margin: 8px 0; }
footer {
  padding: 28px 24px 48px;
  border-top: 10px solid transparent;
  border-image: repeating-linear-gradient(135deg, var(--stripe-r) 0 10px, var(--stripe-b) 10px 20px, #f4ead6 20px 28px) 10;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}
@media (max-width: 880px) {
  .desk, .tri, .bench { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .stamp-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: 1px solid rgba(22, 58, 107, 0.2);
  }
  .stamp-links.open { display: flex; }
  .desk .copy { padding: 32px 20px 48px; }
  .w { width: min(1080px, calc(100% - 32px)); padding: 48px 0; }
  h1 { font-size: 36px; }
}