:root {
  --bg: #05070e;
  --panel: #12182a;
  --line: #2b365a;
  --text: #e6f1ff;
  --muted: #9bb1c8;
  --signal: #89f0ff;
  --accent: #ffd166;
  --glitch: #ff5d8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgba(137, 240, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #0a1020, var(--bg));
  color: var(--text);
  font-family: "IBM Plex Mono", "Consolas", monospace;
}

.shell {
  width: min(1080px, calc(100vw - 32px));
  margin: 24px auto;
}

.rack {
  border: 3px solid var(--line);
  background: rgba(18, 24, 42, 0.94);
  padding: 24px;
  box-shadow: 0 0 0 6px rgba(137, 240, 255, 0.05);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--signal);
  letter-spacing: 0.14em;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

.display {
  display: grid;
  gap: 8px;
  text-align: right;
}

.copy {
  margin: 0 0 24px;
  line-height: 1.6;
  color: var(--muted);
}

.cartridges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.slot {
  display: block;
  padding: 18px;
  border: 2px solid var(--line);
  background: #1a2137;
  cursor: pointer;
}

.slot.live {
  border-color: var(--accent);
  color: var(--accent);
}

.slot.glitch {
  border-color: var(--glitch);
  color: var(--glitch);
}

.slot h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.slot p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.reader {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 16px;
  align-items: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid var(--line);
}

.panel-label {
  margin: 0 0 10px;
  color: var(--signal);
  letter-spacing: 0.14em;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.core-button {
  width: 100%;
  border: 2px solid var(--line);
  background: #1a2137;
  color: var(--text);
  padding: 16px 18px;
  cursor: pointer;
  font: inherit;
}

.core-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.core-output {
  min-height: 96px;
  margin: 20px 0 0;
  padding: 16px;
  border: 2px solid var(--line);
  background: #0d1322;
  color: var(--signal);
  white-space: pre-wrap;
}

@media (max-width: 900px) {
  .hero,
  .reader {
    display: grid;
    grid-template-columns: 1fr;
  }

  .display {
    text-align: left;
  }
}