:root {
  --rice: #f4ecda;
  --rice-2: #e8dcc4;
  --ink: #1c1a16;
  --mute: #6a6154;
  --vermilion: #b42318;
  --cinnabar: #c45c4a;
  --seal: #7a1f18;
  --ok: #3b5c48;
  --serif: "Noto Serif SC", "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: 96px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--rice);
  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(--vermilion);
  text-decoration: underline;
  text-underline-offset: 3px;
}

button {
  font-family: inherit;
  cursor: pointer;
}

code {
  font-family: var(--mono);
  background: rgba(180, 35, 24, 0.08);
  padding: 0.05em 0.35em;
}

.rice-sheet {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.35;
  background-image:
    url("images/texture.webp"),
    repeating-linear-gradient(
      var(--rice-2) 0 1px,
      transparent 1px 28px
    ),
    repeating-linear-gradient(
      90deg,
      var(--rice-2) 0 1px,
      transparent 1px 28px
    );
  background-size: 280px auto, auto, auto;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 40;
  background: #fff;
  padding: 0.4rem 0.8rem;
}

.vermilion-rule {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 1.2rem 0.7rem;
  background: rgba(244, 236, 218, 0.95);
  border-bottom: 8px solid var(--vermilion);
  box-shadow: 0 1px 0 #1c1a16;
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--serif);
  font-weight: 700;
}

.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.1em;
}

.seal-box {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border: 2px solid var(--vermilion);
  color: var(--vermilion);
  font-family: var(--serif);
}

.nav-toggle {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--ink);
  padding: 0.3rem 0.65rem;
  font-family: var(--serif);
}

.desk-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1rem;
  font-size: 0.92rem;
}

.desk-nav a.is-active {
  color: var(--vermilion);
  box-shadow: inset 0 -2px 0 var(--vermilion);
}

.desk-nav .live {
  background: var(--vermilion);
  color: var(--rice);
  padding: 0.2rem 0.65rem;
}

main {
  position: relative;
  z-index: 2;
}

.hero {
  width: min(980px, calc(100% - 2rem));
  margin: 2rem auto 0;
}

.gbt-frame {
  border: 1px solid var(--ink);
  padding: 1.8rem 1.4rem 1.6rem;
  background: rgba(244, 236, 218, 0.72);
  box-shadow: 8px 8px 0 rgba(180, 35, 24, 0.12);
}

.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--vermilion);
  margin: 0 0 0.7rem;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  line-height: 1.25;
  margin: 0 0 0.7rem;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.15rem);
}

.lead {
  max-width: 68ch;
  margin: 0 0 1rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.chip {
  font-family: var(--mono);
  font-size: 0.74rem;
  border: 1px solid var(--ink);
  padding: 0.12rem 0.45rem;
}

.chip.warn {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-family: var(--serif);
  border: 1px solid var(--ink);
}

.btn-fill {
  background: var(--vermilion);
  color: var(--rice);
  border-color: var(--vermilion);
}

.desk-photo {
  margin: 1.1rem 0 0;
}

.desk-photo img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  border: 1px solid var(--ink);
}

.desk-photo figcaption {
  font-size: 0.85rem;
  color: var(--mute);
  padding: 0.4rem 0 0;
}

.sheet {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0;
}

.sheet-head {
  margin-bottom: 1.6rem;
}

.vlabel {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--vermilion);
  margin: 0 0 0.35rem;
  white-space: nowrap;
}

.sheet-head h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.sheet-head p {
  margin: 0;
  color: var(--mute);
}

.margin-pair {
  display: grid;
  gap: 0.85rem;
}

.margin-pair article {
  border-left: 3px solid var(--vermilion);
  padding: 0.2rem 0 0.2rem 1rem;
  background: transparent;
}

.margin-pair ul {
  margin: 0;
  padding-left: 1.1rem;
}

.ink-band {
  background: rgba(180, 35, 24, 0.05);
  border-block: 1px solid rgba(28, 26, 22, 0.12);
}

.wen-strip {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 2rem;
  padding: 0;
}

.wen-strip li {
  font-family: var(--serif);
  border: 1px solid var(--ink);
  padding: 0.35rem 0.8rem;
}

.wen-strip .hot {
  background: var(--vermilion);
  color: var(--rice);
  border-color: var(--vermilion);
}

.draft-block {
  display: grid;
  gap: 1.1rem;
  margin-bottom: 2.2rem;
  align-items: center;
}

.draft-block figure {
  margin: 0;
}

.draft-block img {
  border: 1px solid var(--ink);
  width: 100%;
}

.draft-block figcaption {
  font-size: 0.84rem;
  color: var(--mute);
  padding-top: 0.35rem;
}

.idx {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--vermilion);
}

.dial {
  margin-top: 0.9rem;
  padding: 0.8rem;
  border: 1px dashed var(--vermilion);
  background: rgba(244, 236, 218, 0.9);
}

.dial-label {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  color: var(--mute);
}

.slider {
  display: grid;
  grid-template-columns: 1.6rem 1fr auto;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.slider input {
  width: 100%;
  accent-color: var(--vermilion);
}

.tri-state {
  margin: 0.5rem 0 0;
  font-weight: 600;
}

.tri-state.ok {
  color: var(--ok);
}

.tri-state.warn {
  color: #8a5a12;
}

.tri-state.late {
  color: var(--vermilion);
}

.five-desk {
  display: grid;
  gap: 0.7rem;
}

.five-desk article {
  border-top: 1px solid var(--ink);
  padding: 0.7rem 0;
}

.five-desk h3 {
  margin-bottom: 0.25rem;
}

.rule-list {
  margin: 0;
  padding-left: 1.2rem;
}

.rule-list li {
  margin-bottom: 0.4rem;
}

.io {
  display: grid;
  gap: 1rem;
}

.io div {
  border: 1px solid var(--ink);
  padding: 1rem;
}

footer {
  position: relative;
  z-index: 2;
  padding: 1.3rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--mute);
  border-top: 8px solid var(--vermilion);
}

@media (min-width: 840px) {
  .gbt-frame {
    padding: 2.4rem 2.2rem;
  }

  .margin-pair {
    grid-template-columns: repeat(3, 1fr);
  }

  .draft-block {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .draft-block.rev {
    grid-template-columns: 0.85fr 1.15fr;
  }

  .draft-block.rev > div {
    order: 2;
  }

  .five-desk {
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }

  .io {
    grid-template-columns: 1fr 1fr;
  }

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 839px) {
  .desk-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--rice);
    border-bottom: 8px solid var(--vermilion);
    padding: 0.8rem 1.1rem 1rem;
    flex-direction: column;
  }

  .desk-nav.open {
    display: flex;
  }

  .vermilion-rule {
    flex-wrap: wrap;
  }
}