:root {
  --bay: #1a1e22;
  --bay-2: #242a30;
  --gauge: #7ecf9a;
  --sticker: #e8c547;
  --mute: #8a949c;
  --paper: #e8eef0;
  --line: rgba(232,197,71,0.28);
  --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: 72px; }
body { margin: 0; color: var(--paper); background: var(--bay); 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(--sticker); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
code { font-family: var(--mono); color: var(--gauge); background: rgba(126,207,154,0.12); padding: 0.05em 0.35em; }
.grain { pointer-events: none; position: fixed; inset: 0; z-index: 16; opacity: 0.14; background-image: url("images/texture.webp"); mix-blend-mode: overlay; background-size: 400px auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--sticker); color: #111; padding: 8px; }
.bar { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 24px; background: rgba(26,30,34,0.94); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; }
.brand small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; color: var(--mute); font-weight: 400; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--sticker); color: var(--sticker); padding: 6px 12px; }
.nav-links { display: flex; gap: 14px; font-size: 14px; }
.nav-links a { color: var(--mute); }
.nav-links a.is-active, .nav-links a:hover { color: var(--sticker); }
.nav-links .live { background: var(--sticker); color: #111; padding: 6px 12px; font-weight: 700; }
.hero { position: relative; min-height: 92vh; display: grid; align-items: end; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,30,34,0.2), rgba(26,30,34,0.88)); }
.copy { position: relative; z-index: 1; padding: 10vh 6vw 8vh; max-width: 740px; }
.kicker { font-family: var(--mono); letter-spacing: 0.16em; font-size: 11px; color: var(--sticker); margin: 0 0 12px; }
h1, h2, h3 { margin: 0 0 12px; line-height: 1.12; }
h1 { font-size: clamp(34px, 5.8vw, 64px); }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
.lead, .quiet { max-width: 44em; color: var(--mute); }
.dens { margin: 22px 0; padding: 16px; border: 2px solid var(--sticker); background: rgba(26,30,34,0.72); max-width: 34em; }
.read { font-family: var(--mono); font-size: 20px; color: var(--gauge); margin: 0 0 8px; }
.dens-state { min-height: 3.2em; font-size: 14px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; border: 1px solid currentColor; font-family: var(--mono); font-size: 13px; }
.btn.fill { background: var(--sticker); color: #111; border-color: var(--sticker); }
.btn.ghost { color: var(--paper); }
.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }
.alt { background: var(--bay-2); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.two article { padding: 18px; border-left: 4px solid var(--gauge); }
.two ul { margin: 0; padding-left: 1.1em; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; padding: 24px 0; border-top: 1px solid var(--line); }
.row.flip > figure { order: -1; }
.row span { font-family: var(--mono); color: var(--sticker); }
.row img { width: 100%; height: 200px; object-fit: cover; }
.row figcaption { font-family: var(--mono); font-size: 12px; color: var(--mute); margin-top: 8px; }
.mods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.mods article { padding: 16px; border-top: 4px solid var(--gauge); background: var(--bay); }
.bound { list-style: none; margin: 0; padding: 0; counter-reset: b; }
.bound li { counter-increment: b; padding: 12px 0 12px 70px; border-bottom: 1px solid var(--line); position: relative; }
.bound li::before { content: "SF6-" counter(b, decimal-leading-zero); position: absolute; left: 0; font-family: var(--mono); color: var(--sticker); font-size: 12px; }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.io div { padding: 18px; border: 1px solid var(--line); }
.io ul { margin: 0; padding-left: 1.1em; }
footer { display: flex; justify-content: space-between; gap: 12px; padding: 20px 6vw 36px; color: var(--mute); font-size: 14px; }
@media (max-width: 980px) {
  .two, .row, .row.flip, .mods, .io, footer { grid-template-columns: 1fr; }
  .row.flip > figure { order: 0; }
  .nav-toggle { display: inline-flex; }
  .nav-links { display: none; position: absolute; top: 54px; right: 12px; left: 12px; flex-direction: column; background: var(--bay-2); border: 1px solid var(--line); padding: 12px; }
  .nav-links.open { display: flex; }
}