:root {
  --gown: #4d7a96;
  --gown-deep: #2f5166;
  --steel: #c8d0d6;
  --steel-ink: #5c6a74;
  --lamp: #f3e6c4;
  --amber-cell: #d4892a;
  --ink: #1c2c38;
  --mute: #5a6d78;
  --paper: #e8eef2;
  --paper-2: #d5e0e6;
  --ok: #2a6f62;
  --late: #b42318;
  --display: "Red Hat Display", "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: 96px;
}

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

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

code {
  font-family: var(--mono);
  background: rgba(77, 122, 150, 0.14);
  padding: 0.05em 0.35em;
}

.lamp-wash {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.18;
  background-image:
    url("images/texture.webp"),
    repeating-linear-gradient(
      90deg,
      transparent 0 88px,
      rgba(243, 230, 196, 0.35) 88px 92px
    );
  background-size: 240px auto, auto;
  mix-blend-mode: multiply;
}

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

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

.corridor-rail {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1.2rem;
  background: rgba(232, 238, 242, 0.94);
  border-bottom: 3px solid var(--gown);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.08em;
}

.gown-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  background: var(--gown);
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 4px 4px 0 var(--amber-cell);
}

.nav-toggle {
  margin-left: auto;
  background: #fff;
  border: 2px solid var(--ink);
  padding: 0.35rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.rail-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.9rem;
  font-size: 0.92rem;
}

.rail-nav a {
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}

.rail-nav a.is-active {
  border-bottom-color: var(--amber-cell);
}

.rail-nav .live {
  background: var(--ink);
  color: #fff;
  padding: 0.25rem 0.7rem;
  border-bottom: 0;
}

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

.hero {
  display: grid;
}

.isolator-pane img {
  width: 100%;
  height: min(68vh, 620px);
  object-fit: cover;
}

.hero-plate {
  background: var(--gown-deep);
  color: #f4f7f8;
  padding: 2.2rem 1.4rem 2.6rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--lamp);
  margin: 0 0 0.6rem;
}

h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.15;
  margin: 0 0 0.7rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
}

.lead {
  max-width: 70ch;
  color: #d7e3ea;
  margin: 0 0 1.1rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.1rem;
}

.chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.15rem 0.5rem;
}

.chip.warn {
  background: var(--amber-cell);
  color: #1c2c38;
  border-color: var(--amber-cell);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.btn {
  display: inline-block;
  padding: 0.55rem 0.95rem;
  font-family: var(--display);
  font-weight: 700;
  border: 2px solid #f4f7f8;
}

.btn-fill {
  background: var(--lamp);
  color: var(--ink);
  border-color: var(--lamp);
}

.btn-ghost {
  color: #f4f7f8;
}

.pad {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.2rem 0;
}

.pad-head {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  margin-bottom: 1.8rem;
}

.vlabel {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--gown);
  margin: 0;
  white-space: nowrap;
}

.pad-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
}

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

.steel-plates {
  display: grid;
  gap: 0.9rem;
}

.steel-plates article {
  background: linear-gradient(180deg, #f7fafb, var(--paper-2));
  border: 1px solid var(--steel);
  border-left: 6px solid var(--gown);
  padding: 1.1rem 1.15rem;
  box-shadow: inset 0 1px 0 #fff, 0 8px 0 rgba(47, 81, 102, 0.08);
}

.steel-plates h3 {
  font-size: 1.05rem;
}

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

.gown-band {
  background: rgba(77, 122, 150, 0.08);
  border-block: 1px solid var(--steel);
}

.vein-axis {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.4rem;
}

.vein-axis li {
  background: #fff;
  border: 1px solid var(--steel);
  padding: 0.7rem 0.55rem;
  font-size: 0.88rem;
  position: relative;
}

.vein-axis li span {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gown);
  margin-bottom: 0.2rem;
}

.vein-axis .hot {
  background: var(--amber-cell);
  border-color: var(--amber-cell);
  color: var(--ink);
}

.vein-axis .hot span {
  color: var(--ink);
}

.cell-row {
  display: grid;
  gap: 1.2rem;
  margin-bottom: 2.2rem;
  align-items: center;
}

.cell-row figure {
  margin: 0;
  border: 8px solid var(--steel);
  background: #fff;
}

.cell-row figcaption {
  font-size: 0.82rem;
  color: var(--mute);
  padding: 0.45rem 0.6rem 0.6rem;
}

.idx {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--gown);
}

.dial {
  margin-top: 1rem;
  padding: 0.85rem;
  background: #fff;
  border: 1px dashed var(--gown);
}

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

.slider {
  display: grid;
  grid-template-columns: 1.6rem 1fr 4rem;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.8rem;
}

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

.tri-state {
  margin: 0.55rem 0 0;
  font-weight: 600;
}

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

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

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

.slot-board {
  display: grid;
  border: 1px solid var(--steel);
  background: #fff;
}

.slot-head,
.slot-cell {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 1fr 0.7fr 1.3fr 1fr;
  gap: 0.4rem;
  padding: 0.55rem 0.7rem;
  font-size: 0.86rem;
}

.slot-head {
  font-family: var(--mono);
  font-size: 0.72rem;
  background: var(--gown-deep);
  color: #fff;
}

.slot-cell {
  border-top: 1px solid var(--steel);
  font-family: var(--mono);
}

.slot-cell:nth-child(even) {
  background: rgba(77, 122, 150, 0.06);
}

.overdue-cell {
  background: rgba(212, 137, 42, 0.28) !important;
  box-shadow: 10px 0 0 var(--amber-cell);
}

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

.rule-list li {
  margin-bottom: 0.45rem;
}

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

.io div {
  background: #fff;
  border: 1px solid var(--steel);
  padding: 1rem 1.1rem;
}

footer {
  position: relative;
  z-index: 2;
  padding: 1.4rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--mute);
  border-top: 3px solid var(--gown);
}

@media (min-width: 880px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .isolator-pane img {
    height: 100%;
    min-height: 560px;
  }

  .hero-plate {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 2.2rem;
  }

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

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

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

  .cell-row.rev > div {
    order: 2;
  }

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

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 879px) {
  .pad-head {
    grid-template-columns: 1fr;
  }

  .vein-axis {
    grid-template-columns: 1fr 1fr;
  }

  .slot-head,
  .slot-cell {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .corridor-rail {
    flex-wrap: wrap;
  }
}