:root {
  --sky: #d7e0d4;
  --ink: #1c241c;
  --mesh: #7a8f6e;
  --hole: #e07a2a;
  --mute: #5c6b58;
  --ok: #3d7a52;
  --warn: #c45a18;
  --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: 76px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--sky);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--warn); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
code { font-family: var(--mono); background: rgba(122, 143, 110, 0.18); padding: 0.05em 0.35em; }

.mesh-veil {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: 0.18;
  background-image:
    url("images/texture.webp"),
    repeating-linear-gradient(0deg, transparent 0 18px, rgba(28, 36, 28, 0.08) 18px 19px),
    repeating-linear-gradient(90deg, transparent 0 18px, rgba(28, 36, 28, 0.08) 18px 19px);
  background-size: 360px auto, auto, auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 70; background: var(--hole); color: #fff; padding: 8px 12px; }

.border-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 22px;
  background: rgba(215, 224, 212, 0.92);
  border-bottom: 1px dashed var(--mesh);
}
.ring-mark { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 22px; }
.ring-mark small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em; color: var(--mute); }
.ring {
  width: 28px;
  height: 28px;
  border: 3px solid var(--mesh);
  border-radius: 50%;
  box-shadow: 8px -6px 0 0 var(--hole);
}
.nav-toggle { display: none; background: var(--ink); color: var(--sky); border: 0; padding: 10px 14px; font-size: 16px; }
.border-links { display: flex; gap: 16px; align-items: center; font-size: 14px; }
.border-links a { color: var(--mute); }
.border-links a.is-active, .border-links a:hover { color: var(--ink); }
.border-links .live { background: var(--hole); color: #fff; padding: 8px 12px; }

.sky { position: relative; min-height: 100vh; display: grid; align-items: end; }
.sky img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(28, 36, 28, 0.15) 0%, rgba(28, 36, 28, 0.72) 100%);
}
.sky-copy { position: relative; z-index: 1; color: #eef3ea; padding: 10vh 8vw 8vh; max-width: 820px; }
.sky-copy .kicker { color: var(--hole); }
.kicker { font-family: var(--mono); letter-spacing: 0.18em; font-size: 12px; color: var(--warn); margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--serif); margin: 0 0 12px; line-height: 1.08; }
h1 { font-size: clamp(42px, 7vw, 84px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: 22px; }
.lead { font-size: 17px; }
.zones { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 18px 0; }
.zones li { font-family: var(--mono); font-size: 12px; border: 1px solid rgba(224, 122, 42, 0.55); padding: 4px 10px; }
.acts { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; padding: 12px 16px; border: 2px solid currentColor; font-size: 15px; }
.fill { background: var(--hole); border-color: var(--hole); color: #fff; }
.ghost { background: transparent; }

.wrap { width: min(1060px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }
.pad { background: var(--sky); }
.dim { background: #c9d4c6; }
.quiet { color: var(--mute); max-width: 44em; }

.mesh-map {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2px;
  margin-top: 28px;
  background: var(--mesh);
  padding: 2px;
}
.mesh-map article { background: #eef3ea; padding: 20px; }
.mesh-map span { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--warn); }
.alert-cell { outline: 3px solid var(--hole); outline-offset: -3px; }
.mesh-map ul { margin: 8px 0 0; padding-left: 1.1em; }

.hex { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin: 44px 0; }
.hex.rev figure { order: 2; }
.n { font-family: var(--mono); color: var(--warn); letter-spacing: 0.12em; font-size: 12px; display: block; margin-bottom: 8px; }
figure { margin: 0; }
figure img { width: 100%; height: 270px; object-fit: cover; }
figcaption { margin-top: 8px; font-size: 13px; color: var(--mute); }

.hole-demo { margin-top: 16px; padding: 14px; background: #eef3ea; border: 2px dashed var(--mesh); }
.hole-label { margin: 0 0 10px; font-family: var(--mono); font-size: 12px; color: var(--mute); }
.hole-row { display: grid; grid-template-columns: 40px 1fr 72px; gap: 10px; align-items: center; }
.hole-row input { width: 100%; accent-color: var(--hole); }
.hole-row strong { font-family: var(--mono); font-size: 20px; }
.ty-row { display: flex; gap: 10px; align-items: center; margin-top: 10px; }
.ty-row input { width: 20px; height: 20px; accent-color: var(--hole); }
.hole-state { margin: 10px 0 0; font-family: var(--mono); font-size: 14px; }
.hole-state.ok { color: var(--ok); }
.hole-state.warn { color: var(--warn); }

.mods { list-style: none; margin: 28px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.mods li { background: #eef3ea; padding: 18px; border-top: 4px solid var(--mesh); }
.mods p { margin: 0; color: var(--mute); font-size: 14px; }

.vals { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 24px; }
.vals article { padding: 18px; background: #eef3ea; }
.vals p { margin: 0; color: var(--mute); }

.laws { max-width: 46em; font-size: 17px; }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 18px; }
.io ul { margin: 0; padding-left: 1.1em; }

footer { background: var(--ink); color: #c9d4c6; }
.foot { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; padding-top: 24px; padding-bottom: 24px; }
footer .app-link { color: var(--hole); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .border-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 12px 16px 18px;
    background: var(--sky);
  }
  .border-links.open { display: flex; }
  .wrap { width: min(1060px, calc(100% - 24px)); padding: 48px 0; }
  .mesh-map, .hex, .hex.rev, .mods, .vals, .io, .foot { grid-template-columns: 1fr; display: grid; }
  .hex.rev figure { order: 0; }
  h1 { font-size: 38px; }
  figure img { height: 200px; }
  .hole-row { grid-template-columns: 1fr; }
  .btn { min-height: 44px; }
}