/* ============================================================
   starCMD — micro-site d'introduction
   Direction : « Carte stellaire » — sobre, cartographique, calme.
   Aucune dépendance externe : polices système uniquement.
   ============================================================ */

:root {
  --bg: #060a14;
  --bg-raised: #0a101f;
  --ink: #d4dcec;
  --ink-strong: #eef3fb;
  --ink-dim: #8b97ad;
  --accent: #7fd8ff;
  --accent-soft: rgba(127, 216, 255, 0.14);
  --gold: #e6c584;
  --line: rgba(180, 200, 235, 0.14);
  --line-strong: rgba(180, 200, 235, 0.28);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;

  --measure: 62ch;
  --space-section: clamp(6rem, 14vh, 10rem);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(1100px 600px at 75% -10%, rgba(56, 96, 160, 0.16), transparent 65%),
    radial-gradient(900px 700px at 10% 110%, rgba(40, 70, 130, 0.12), transparent 60%);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ---- accessibilité ---- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10;
  padding: 0.5rem 1rem;
  background: var(--bg-raised);
  color: var(--ink-strong);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
}
.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink-strong);
}

/* ---- champ d'étoiles ---- */

#starfield {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
}

/* ---- hero ---- */

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 2.25rem;
}

.wordmark {
  margin: 0;
  font-size: clamp(3rem, 11vw, 6.5rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  font-weight: 200;
  color: var(--ink-strong);
}

.wordmark-star {
  font-weight: 200;
}

.wordmark-cmd {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.86em;
  color: var(--accent);
  text-shadow: 0 0 24px rgba(127, 216, 255, 0.35);
}

.hero-tagline {
  margin: 2rem 0 0.4rem;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--ink-strong);
  letter-spacing: 0.04em;
}

.hero-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-dim);
}

.hero-scroll {
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink-dim);
  text-decoration: none;
}

.hero-scroll-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.hero-scroll-line {
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(to bottom, var(--line-strong), transparent);
}

.hero-scroll:hover .hero-scroll-label,
.hero-scroll:focus-visible .hero-scroll-label {
  color: var(--accent);
}

/* ---- sections ---- */

.section {
  max-width: 46rem;
  margin: 0 auto;
  padding: var(--space-section) 1.5rem 0;
}

.section-marker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.75rem;
}

.section-marker::before {
  content: "— ";
  color: var(--line-strong);
}

.section h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 300;
  letter-spacing: 0.01em;
  color: var(--ink-strong);
}

.section-body {
  max-width: var(--measure);
}

.section-body p {
  margin: 0 0 1.2rem;
}

.section-body strong {
  color: var(--ink-strong);
  font-weight: 600;
}

.section-body em {
  color: var(--accent);
  font-style: normal;
}

/* ---- carte de la station ---- */

.section-map {
  max-width: 72rem;
}

.map-caption {
  margin: -0.75rem 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-dim);
}

.station-map {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background:
    radial-gradient(650px 320px at 50% 45%, rgba(64, 110, 180, 0.10), transparent 70%),
    var(--bg-raised);
  padding: clamp(0.5rem, 2vw, 1.5rem);
  overflow: hidden;
}

.station-map svg {
  display: block;
  width: 100%;
  height: auto;
}

.map-dust circle {
  opacity: 0.5;
}

.orbit-ring {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.orbit-ring-inner {
  stroke-dasharray: 1 9;
}

.map-links line {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.map-signal {
  fill: var(--accent);
  filter: drop-shadow(0 0 6px rgba(127, 216, 255, 0.9));
}

.core-dot {
  fill: var(--accent);
}

.core-halo {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  opacity: 0.6;
  transform-origin: 600px 320px;
  animation: halo-pulse 4.5s ease-in-out infinite;
}

@keyframes halo-pulse {
  0%, 100% { transform: scale(1);    opacity: 0.6; }
  50%      { transform: scale(1.45); opacity: 0.12; }
}

.map-nodes circle {
  fill: var(--ink-strong);
}

.map-nodes g:nth-child(-n+4) circle {
  fill: var(--gold);
}

.map-label {
  font-family: var(--font-mono);
  font-size: 15px;
  fill: var(--ink-dim);
  text-anchor: middle;
  letter-spacing: 0.08em;
}

.map-label-core {
  fill: var(--accent);
  font-size: 14px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.map-label-dim {
  opacity: 0.55;
  font-size: 13px;
}

.map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.75rem;
  justify-content: center;
  padding: 1rem 0.5rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

/* ---- principes ---- */

.principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.25rem;
}

.principle {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-raised);
  padding: 1.5rem 1.5rem 1.25rem;
  transition: border-color 0.3s ease;
}

.principle:hover {
  border-color: var(--line-strong);
}

.principle-icon {
  display: inline-flex;
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  margin-bottom: 1rem;
}

.principle-icon svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.principle h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-strong);
}

.principle p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-dim);
}

/* ---- footer ---- */

.footer {
  margin-top: var(--space-section);
  padding: 3rem 1.5rem 3.5rem;
  text-align: center;
  border-top: 1px solid var(--line);
}

.footer-domain {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--ink-strong);
}

.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

/* ---- mouvement réduit ---- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .core-halo { animation: none; }
  .map-signal { display: none; }
  .principle { transition: none; }
}