@font-face {
  font-family: "Futura LT Light";
  src: local("Futura LT Light");
  font-weight: 300;
}

@font-face {
  font-family: "Futura LT Book";
  src: local("Futura LT Book");
  font-weight: 500;
}

:root {
  --black: #000;
  --white: #fff;
  --muted: rgba(255, 255, 255, 0.7);
  --faint: rgba(255, 255, 255, 0.4);
  --line: rgba(255, 255, 255, 0.3);
  --light-font: "Futura LT Light", "Futura LT", Futura, "Trebuchet MS", Arial, sans-serif;
  --book-font: "Futura LT Book", "Futura LT", Futura, "Trebuchet MS", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--light-font);
}

button, input { font: inherit; }

.page { min-height: 100vh; padding: 32px 16px; }
.container { max-width: 1152px; margin: 0 auto; }

.hero, .card {
  border: 1px solid var(--faint);
  background: var(--black);
}

.hero {
  border-color: var(--white);
  padding: 24px;
  margin-bottom: 32px;
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.35em;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.intro {
  max-width: 720px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hero-icon, .icon {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--book-font);
}

.hero-icon { width: 72px; height: 72px; font-size: 42px; flex: 0 0 auto; }

.layout {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 24px;
}

.left-col, .right-col { display: flex; flex-direction: column; gap: 24px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.card { padding: 20px; }

.card-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.icon { width: 36px; height: 36px; }

h2 {
  margin: 0;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.book, .metric strong, .data-table strong, .toggle-btn, input { font-family: var(--book-font); }

.field-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

.toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  border: 1px solid var(--line);
  padding: 4px;
}

.toggle.three {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 16px;
}

.toggle-btn {
  border: 0;
  background: transparent;
  color: var(--white);
  padding: 12px 16px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 14px;
}

.toggle-btn:hover { background: rgba(255, 255, 255, 0.1); }
.toggle-btn.active { background: var(--white); color: var(--black); }

.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

input {
  width: 100%;
  border: 1px solid var(--faint);
  background: var(--black);
  color: var(--white);
  padding: 12px 16px;
  font-size: 18px;
  outline: none;
}

input:focus { border-color: var(--white); }

.hint {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  line-height: 1.5;
}

.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.metric-grid.one { grid-template-columns: 1fr; }

.metric {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--black);
  padding: 16px;
}

.metric p {
  margin: 0;
  color: rgba(0, 0, 0, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  color: var(--black);
  font-size: 26px;
  line-height: 1;
  font-weight: normal;
}

.data-table {
  border: 1px solid var(--line);
  overflow: hidden;
}

.data-table > div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 12px 16px;
  font-size: 14px;
}

.data-table > div:nth-child(odd) { background: rgba(255, 255, 255, 0.08); }
.data-table span { color: var(--muted); }
.data-table strong { color: var(--white); font-weight: normal; white-space: nowrap; }

.wiring-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  padding: 12px;
}

.wiring-grid {
  display: grid;
  gap: 4px;
  min-width: 520px;
}

.panel-cell {
  position: relative;
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(255,255,255,0.45);
  padding: 8px;
  min-width: 58px;
}

.panel-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 4px;
}

.panel-number { font-size: 10px; opacity: 0.7; }
.start-flags { display: flex; gap: 4px; }

.start-flag {
  border: 1px solid currentColor;
  padding: 0 4px;
  font-size: 9px;
  line-height: 14px;
  font-family: var(--book-font);
}

.run-tags {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 10px;
  line-height: 1;
}

.run-tag {
  display: flex;
  justify-content: space-between;
  gap: 4px;
  padding: 3px 4px;
  border: 1px solid currentColor;
  font-family: var(--book-font);
}

.legend {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
}

.legend-chip {
  display: inline-block;
  margin-right: 4px;
  border: 1px solid var(--white);
  padding: 1px 4px;
  font-family: var(--book-font);
}

.data-chip { background: var(--white); color: var(--black); }
.power-chip { color: var(--white); }
.hidden { display: none !important; }

@media (max-width: 900px) {
  .layout, .two-col { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { align-items: flex-start; }
}

@media (max-width: 560px) {
  .page { padding: 20px 12px; }
  .hero { flex-direction: column; }
  .hero-icon { width: 56px; height: 56px; font-size: 32px; }
  .input-grid, .metric-grid { grid-template-columns: 1fr; }
  .data-table > div { grid-template-columns: 1fr; gap: 6px; }
  .toggle, .toggle.three { grid-template-columns: 1fr; }
}