:root {
  --ember: #e08a2a;
  --couple: #f0c040;
  --ash: #1c1612;
  --steel: #2a2420;
  --paper: #1a1614;
  --ink: #f4e6d0;
  --mute: #b8a090;
  --line: rgba(240, 192, 64, 0.22);
  --shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", sans-serif;
  line-height: 1.65;
}
.scale {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 5;
  opacity: 0.12;
  background-image: url("images/texture.webp");
  background-size: 480px auto;
  mix-blend-mode: overlay;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 44px; z-index: 80; background: var(--couple); color: var(--ash); padding: 8px; }
.alert {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 46;
  margin: 0;
  background: var(--ember);
  color: var(--ash);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  text-align: center;
  padding: 7px 16px;
}
.nav {
  position: fixed;
  top: 34px; left: 0; right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 24px;
  background: rgba(26, 22, 20, 0.92);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: inherit; text-decoration: none; font-weight: 700;
}
.brand small {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px; font-weight: 400; color: var(--mute); letter-spacing: 0.12em;
}
.peak {
  width: 0; height: 0;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-bottom: 20px solid var(--ember);
  position: relative;
}
.peak::after {
  content: "";
  position: absolute;
  left: -4px; top: 8px;
  width: 8px; height: 8px;
  background: var(--couple);
  border-radius: 50%;
}
.nav-toggle { display: none; background: transparent; border: 1px solid var(--couple); color: var(--couple); padding: 6px 12px; }
.nav-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; }
.nav-links a { color: var(--mute); text-decoration: none; font-size: 14px; }
.nav-links a.is-active { color: var(--couple); }
.nav-links .live, .live {
  border: 1px solid var(--ember); padding: 4px 10px; color: var(--ember); text-decoration: none;
}
h1, h2, h3 { margin: 0 0 0.4em; line-height: 1.2; }
h1 { font-size: clamp(2.2rem, 5.6vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.hero { position: relative; min-height: 100svh; 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(26,22,20,0.2) 0%, rgba(26,22,20,0.82) 100%);
}
.hero-copy { position: relative; z-index: 1; padding: 22vh 7vw 10vh; max-width: 820px; }
.kicker, .vlabel {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.14em; color: var(--couple); font-size: 12px;
}
.mountain {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 0;
  margin: 22px 0;
  align-items: end;
  min-height: 88px;
}
.mountain span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  padding: 10px 8px 8px;
  text-align: center;
  color: var(--ash);
}
.mountain .up {
  background: linear-gradient(180deg, transparent 0%, var(--ember) 100%);
  clip-path: polygon(0 100%, 100% 18%, 100% 100%);
  min-height: 64px;
}
.mountain .hold {
  background: var(--couple);
  min-height: 88px;
  clip-path: polygon(0 18%, 100% 18%, 100% 100%, 0 100%);
}
.mountain .down {
  background: linear-gradient(180deg, transparent 0%, #8a4a18 100%);
  clip-path: polygon(0 18%, 100% 100%, 0 100%);
  min-height: 64px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; text-decoration: none;
  border: 1px solid currentColor; padding: 10px 16px; font: inherit; cursor: pointer;
  background: transparent; color: inherit;
}
.btn-fill { background: var(--ember); color: var(--ash); border-color: var(--ember); }
.wrap { width: min(1100px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0; }
.section-head { display: grid; grid-template-columns: 160px 1fr; gap: 24px; margin-bottom: 32px; }
.alt { background: linear-gradient(180deg, #241c16 0%, var(--paper) 100%); }
.tri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tri article, .cells li, .io article {
  background: var(--steel); border: 1px solid var(--line); padding: 20px; box-shadow: var(--shadow);
}
.tag {
  display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: 11px;
  background: var(--ember); color: var(--ash); padding: 2px 8px; margin-bottom: 8px;
}
.tri ul, .rules, .io ul, .bench ul { padding-left: 1.1em; margin: 0; }
.cells { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cells img { width: calc(100% + 40px); max-width: none; height: 150px; object-fit: cover; display: block; margin: -20px -20px 14px; }
.bench { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; align-items: center; }
.bench img {
  width: 100%; display: block;
  clip-path: polygon(8% 100%, 50% 0, 92% 100%);
  border: 0;
}
.hold-line {
  font-family: "IBM Plex Mono", monospace;
  background: var(--ash); color: var(--couple); padding: 14px 16px;
  border-left: 6px solid var(--ember);
}
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
footer { background: #0e0c0a; color: var(--mute); padding: 28px 0; }
.footer-inner {
  padding: 0; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  width: min(1100px, calc(100% - 48px)); margin: 0 auto;
}
footer .live { color: var(--couple); border-color: var(--couple); }
@media (max-width: 960px) {
  .hero, .section-head, .tri, .cells, .bench, .io, .mountain { grid-template-columns: 1fr; }
  .mountain span { clip-path: none; min-height: auto; }
  .hero { min-height: 100svh; }
  .hero-copy { padding: 130px 20px 48px; }
  .nav { flex-wrap: wrap; }
  .nav-toggle {
    display: inline-flex; margin-left: auto; background: var(--steel);
    position: relative; z-index: 60;
  }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; padding: 12px 16px; background: var(--steel); z-index: 55;
  }
  .nav-links.open { display: flex; }
}