/* Astronaut Venture: welcome page */

:root {
  color-scheme: dark;
  --bg: #070b16;
  --bg-2: #0d1430;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.10);
  --text: #e9edf8;
  --muted: #9aa3bd;
  --accent: #7c8cff;
  --accent-2: #ffb86b;
  --radius: 18px;
  --max: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 60% at 70% -10%, rgba(124, 140, 255, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(255, 184, 107, 0.08), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--text);
  font: 17px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  padding: 8px 14px;
  background: var(--accent);
  color: #0b1020;
  border-radius: 8px;
  z-index: 10;
}
.skip:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- starfield ---------- */

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.stars {
  position: absolute;
  inset: 0;
  background-repeat: repeat;
}

.stars-far {
  background-image:
    radial-gradient(1px 1px at 20px 30px, #fff9, transparent 50%),
    radial-gradient(1px 1px at 140px 80px, #fff6, transparent 50%),
    radial-gradient(1px 1px at 260px 160px, #fff8, transparent 50%),
    radial-gradient(1px 1px at 90px 210px, #fff5, transparent 50%),
    radial-gradient(1px 1px at 330px 40px, #fff7, transparent 50%),
    radial-gradient(1px 1px at 200px 280px, #fff6, transparent 50%);
  background-size: 360px 320px;
  opacity: 0.7;
}

.stars-near {
  background-image:
    radial-gradient(1.5px 1.5px at 60px 120px, #fff, transparent 50%),
    radial-gradient(2px 2px at 420px 60px, #cfd6ff, transparent 50%),
    radial-gradient(1.5px 1.5px at 300px 380px, #fff, transparent 50%),
    radial-gradient(1.5px 1.5px at 520px 260px, #ffe3c4, transparent 50%);
  background-size: 620px 480px;
  animation: twinkle 6s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.45; }
  to   { opacity: 1; }
}

/* ---------- nav ---------- */

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark { width: 30px; height: 30px; }
.brand-mark circle { fill: var(--accent); }
.brand-mark ellipse { fill: none; stroke: var(--accent-2); stroke-width: 2; }

.nav nav { display: flex; gap: 6px; }

.nav nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s, background 0.2s;
}
.nav nav a:hover { color: var(--text); background: var(--surface-hover); }

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

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 24px 96px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 { font-size: clamp(40px, 6.2vw, 72px); font-weight: 700; }

.accent {
  background: linear-gradient(90deg, var(--accent), #b7a6ff 45%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  max-width: 34em;
  margin: 22px 0 34px;
  color: var(--muted);
  font-size: 19px;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #9b8cff);
  color: #0b1020;
  box-shadow: 0 10px 30px -10px rgba(124, 140, 255, 0.7);
}
.btn-primary:hover { box-shadow: 0 14px 36px -10px rgba(124, 140, 255, 0.9); }

.btn-ghost {
  border: 1px solid var(--border);
  background: var(--surface);
}
.btn-ghost:hover { background: var(--surface-hover); }

/* ---------- orbit illustration ---------- */

.orbit-scene {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 1;
  justify-self: center;
}

.orbit-scene > * { position: absolute; }

.glow {
  inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 140, 255, 0.35), transparent 65%);
  filter: blur(20px);
}

.planet {
  inset: 30%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #c7cdff 0%, #7c8cff 28%, #3a3f9e 62%, #151a45 100%);
  box-shadow:
    inset -18px -22px 40px rgba(5, 8, 25, 0.75),
    0 0 60px rgba(124, 140, 255, 0.35);
}

.ring {
  inset: 44% 8%;
  border-radius: 50%;
  border: 3px solid rgba(255, 184, 107, 0.75);
  border-top-color: transparent;
  transform: rotate(-18deg);
}

.orbit {
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  animation: spin linear infinite;
}
.orbit-inner { inset: 18%; animation-duration: 18s; }
.orbit-outer { inset: 2%; animation-duration: 40s; animation-direction: reverse; }

.moon,
.satellite {
  position: absolute;
  top: -6px;
  left: 50%;
  border-radius: 50%;
  transform: translateX(-50%);
}
.moon {
  width: 14px;
  height: 14px;
  background: radial-gradient(circle at 35% 35%, #fff, #ffcf9a 60%, #c7823d);
  box-shadow: 0 0 14px rgba(255, 184, 107, 0.6);
}
.satellite {
  width: 8px;
  height: 8px;
  top: -4px;
  background: #e9edf8;
  box-shadow: 0 0 10px #fff;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 24px;
}

h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 700; }

.cards {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(6px);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 140, 255, 0.45);
  background: var(--surface-hover);
}

.stage {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--accent);
  font: 600 14px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
}

.card h3 { font-size: 22px; margin-bottom: 10px; }
.card p { margin: 0; color: var(--muted); }

.countdown {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  padding: 44px;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(ellipse at 100% 0%, rgba(255, 184, 107, 0.12), transparent 60%),
    var(--surface);
}
.countdown h2 + p { margin: 16px 0 0; color: var(--muted); max-width: 30em; }

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.checklist li::before {
  content: "";
  width: 12px;
  height: 12px;
  flex: none;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.checklist .done { color: var(--text); }
.checklist .done::before { background: var(--accent); border-color: var(--accent); }

.checklist .active { color: var(--text); }
.checklist .active::before {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(255, 184, 107, 0.18);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  50% { box-shadow: 0 0 0 8px rgba(255, 184, 107, 0.05); }
}

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

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 48px;
  color: var(--muted);
  font-size: 14px;
}
/* Border on the inner text so the rule lines up with the content above. */
.footer p {
  margin: 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .footer { padding: 0 20px 40px; }
  .hero {
    grid-template-columns: 1fr;
    padding: 48px 20px 64px;
    gap: 32px;
  }
  .orbit-scene { width: min(80%, 320px); order: -1; }
  .cards { grid-template-columns: 1fr; }
  .countdown { grid-template-columns: 1fr; padding: 32px 24px; }
  .section { padding: 56px 20px; }
  .nav { padding: 20px 20px 0; }
}

@media (max-width: 480px) {
  .nav nav { display: none; }
  .lede { font-size: 17px; }
  .btn { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}