/* The Operator Stack — skeleton site
   Direction: dark operator/terminal. Text-led (copy-only v1, no-face default). */

:root {
  --bg: #0c0e0f;
  --bg-raised: #121517;
  --ink: #e8e6e0;
  --ink-dim: #9a9890;
  --ink-faint: #55534d;
  --accent: #e05c2a;      /* signal orange — the one loud thing */
  --line: #24272a;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; width: 100%; max-width: 880px; margin: 0 auto; padding: 0 24px; }

a { color: var(--ink); text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover, a:focus-visible { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 24px;
  width: 100%;
}

.wordmark {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.22em;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .status-dot { animation: none; }
}

/* Hero */
.hero { padding: 96px 0 72px; border-bottom: 1px solid var(--line); }

.eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 24px;
}

h1 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--ink-dim);
}

.lede {
  margin-top: 32px;
  max-width: 58ch;
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-dim);
}

/* Stack layers */
.stack { padding: 72px 0; border-bottom: 1px solid var(--line); }

.section-label {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  margin-bottom: 40px;
}

.layers { list-style: none; display: grid; gap: 12px; }

.layer {
  display: flex;
  gap: 24px;
  align-items: baseline;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 28px 28px 30px;
  transition: border-color 160ms ease;
}

.layer:hover { border-color: var(--ink-faint); }

/* stepped inset — the "stack" motif */
.layer:nth-child(2) { margin-left: 24px; }
.layer:nth-child(3) { margin-left: 48px; }

.layer-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  flex-shrink: 0;
}

.layer h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.layer p { color: var(--ink-dim); max-width: 56ch; }

@media (max-width: 560px) {
  .layer:nth-child(2), .layer:nth-child(3) { margin-left: 0; }
  .layer { flex-direction: column; gap: 10px; padding: 22px; }
  .hero { padding: 64px 0 56px; }
}

/* Provenance */
.provenance { padding: 56px 0 80px; }

.provenance p {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-dim);
  max-width: 60ch;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  width: 100%;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  flex-wrap: wrap;
}