:root {
  --graphite: #16161a;
  --graphite-2: #222228;
  --fluoro: #d6ff3a;
  --cyan: #3ad7c8;
  --ink: #e8eae6;
  --mute: #9aa09a;
  --late: #ff6b4a;
  --display: "Space Grotesk", "Noto Sans SC", sans-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: 88px;
}

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

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

code {
  font-family: var(--mono);
  background: rgba(214, 255, 58, 0.12);
  padding: 0.05em 0.35em;
}

.frost-grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.16;
  background-image: url("images/texture.webp");
  background-size: 240px auto;
}

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

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 40;
  background: var(--fluoro);
  color: var(--graphite);
  padding: 0.4rem 0.8rem;
}

.fluoro-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.6rem 1.2rem;
  background: rgba(22, 22, 26, 0.94);
  border-bottom: 3px solid var(--fluoro);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--display);
  font-weight: 700;
}

.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.1em;
}

.seat-radar {
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--cyan);
  position: relative;
}

.seat-radar::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--fluoro);
}

.nav-toggle {
  margin-left: auto;
  background: var(--fluoro);
  color: var(--graphite);
  border: 0;
  padding: 0.3rem 0.7rem;
  font-family: var(--display);
  font-weight: 700;
}

.desk-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.95rem;
  font-size: 0.92rem;
}

.desk-nav a.is-active {
  color: var(--fluoro);
}

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

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

.hero figure {
  margin: 0;
}

.hero img {
  width: 100%;
  height: min(52vh, 480px);
  object-fit: cover;
}

.hero-copy {
  width: min(1060px, calc(100% - 2rem));
  margin: -2.4rem auto 0;
  background: var(--graphite-2);
  padding: 1.7rem 1.4rem 1.9rem;
  border-left: 6px solid var(--fluoro);
}

.kicker {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin: 0 0 0.5rem;
}

h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.15;
  margin: 0 0 0.65rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.15rem);
  font-weight: 700;
}

.lead {
  max-width: 74ch;
  color: var(--mute);
  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(--cyan);
  padding: 0.12rem 0.45rem;
}

.chip.warn {
  background: var(--fluoro);
  color: var(--graphite);
  border-color: var(--fluoro);
}

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

.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-family: var(--display);
  font-weight: 700;
  border: 1px solid var(--fluoro);
}

.btn-fill {
  background: var(--fluoro);
  color: var(--graphite);
}

.desk {
  width: min(1060px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0;
}

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

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

.desk-head h2 {
  font-size: clamp(1.45rem, 3vw, 2.05rem);
}

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

.three-seat {
  display: grid;
  gap: 0.8rem;
}

.three-seat article {
  background: var(--graphite-2);
  padding: 1rem 1.05rem;
  border-top: 3px solid var(--cyan);
}

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

.cyan-band {
  background: rgba(58, 215, 200, 0.06);
}

.axis {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  margin: 0 0 2rem;
  padding: 0;
}

.axis li {
  background: var(--graphite-2);
  padding: 0.55rem 0.5rem;
  font-size: 0.85rem;
  border-bottom: 3px solid #333;
}

.axis li span {
  display: block;
  font-family: var(--mono);
  color: var(--cyan);
}

.axis .hot {
  border-bottom-color: var(--fluoro);
  color: var(--fluoro);
}

.leg {
  display: grid;
  gap: 1.1rem;
  margin-bottom: 2.1rem;
  align-items: center;
}

.leg figure {
  margin: 0;
}

.leg img {
  width: 100%;
  border: 1px solid #333;
}

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

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

.dial {
  margin-top: 0.9rem;
  padding: 0.8rem;
  border: 1px dashed var(--fluoro);
  background: rgba(22, 22, 26, 0.7);
}

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

.slider {
  display: grid;
  grid-template-columns: 1.6rem 1fr 3.2rem;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.8rem;
}

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

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

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

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

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

.br-board {
  display: grid;
  border: 1px solid #333;
}

.br-head,
.br-row {
  display: grid;
  grid-template-columns: 0.6fr 1.8fr 0.8fr 0.7fr;
  gap: 0.35rem;
  padding: 0.55rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.br-head {
  background: var(--fluoro);
  color: var(--graphite);
}

.br-row {
  border-top: 1px solid #333;
}

.br-row.hot {
  color: var(--fluoro);
}

.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 #333;
  padding: 1rem;
}

footer {
  position: relative;
  z-index: 2;
  padding: 1.3rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--mute);
  border-top: 3px solid var(--fluoro);
}

@media (min-width: 860px) {
  .hero-copy {
    padding: 2.1rem 2rem;
  }

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

  .leg {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .leg.rev {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .leg.rev > div {
    order: 2;
  }

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

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 859px) {
  .axis,
  .br-head,
  .br-row {
    grid-template-columns: 1fr 1fr;
  }

  .desk-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--graphite);
    border-bottom: 3px solid var(--fluoro);
    padding: 0.8rem 1.1rem 1rem;
    flex-direction: column;
  }

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

  .fluoro-bar {
    flex-wrap: wrap;
  }
}