/* styles.css — MappedSky OSS splash */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: #06091a;
  color: #1a1d2b;
  font-family: var(--font-body, system-ui);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* ── Page shell ─────────────────────────────────────────────── */
.page {
  position: relative;
  min-height: 100vh;
}

/* ── Sky (fixed background) ─────────────────────────────────── */
.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.sky-grad { position: absolute; inset: 0; transition: background 0.6s ease; }
.sky-haze {
  position: absolute;
  inset: auto 0 0 0;
  height: 38vh;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.25) 100%);
  transition: opacity 0.6s ease;
}
.sky-ambient {
  position: absolute;
  inset: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.star {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 4px rgba(255, 255, 255, 0.35);
}
.star.twinkle {
  animation: starTwinkle var(--tw-dur, 4s) ease-in-out infinite;
  animation-delay: var(--tw-delay, 0s);
}
@keyframes starTwinkle {
  0%, 100% { opacity: var(--tw-base, 0.6); }
  50%      { opacity: calc(var(--tw-base, 0.6) * 0.4); }
}

.constellation-wrap {
  position: absolute;
  transform: translate(-50%, -50%);
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.sky-orb {
  position: absolute;
  width: 14vw;
  height: 14vw;
  max-width: 160px;
  max-height: 160px;
  min-width: 80px;
  min-height: 80px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: left 0.6s ease, top 0.6s ease, background 0.6s ease, opacity 0.6s ease;
  filter: blur(0.5px);
  pointer-events: none;
}

/* ── Birds ──────────────────────────────────────────────────── */
.birds {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  transition: opacity 0.4s ease;
  overflow: hidden;
}
.bird-track {
  position: absolute;
  left: 0;
  will-change: transform, opacity;
  transition: opacity 0.2s linear;
}
.bird-formation {
  display: block;
}
.bird {
  display: block;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.05));
}

/* Animation gating */
.anim-off .birds { display: none; }

/* ── Nav ────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 36px;
  color: #15182a;
  transition: color 0.6s ease, background 0.4s ease, backdrop-filter 0.4s ease;
}
.nav.on-night {
  color: #e7eaf5;
  background: linear-gradient(180deg, rgba(6,9,26,0.55) 0%, rgba(6,9,26,0) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  color: inherit;
}
.brand-mark svg { color: currentColor; }
.nav.on-night .brand-mark { color: rgba(255,255,255,0.95); }

.brand-sub {
  font-size: 14px;
  opacity: 0.55;
  margin-left: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}
.nav-links a {
  cursor: pointer;
  opacity: 0.78;
  transition: opacity 0.15s ease;
}
.nav-links a:hover { opacity: 1; }
.nav-links .cta {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid currentColor;
  opacity: 1;
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-links .cta:hover {
  background: #15182a;
  color: #f0f3ff;
}
.nav.on-night .cta:hover {
  background: #f0f3ff;
  color: #06091a;
}

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 120px 36px 80px;
}
.hero-inner {
  max-width: 880px;
  width: 100%;
  transition: color 0.6s ease;
}
.hero-inner.on-day  { color: #14192e; }
.hero-inner.on-night { color: #f0f3ff; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  letter-spacing: 0.04em;
  opacity: 0.7;
  margin: 0 0 28px;
  text-transform: lowercase;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent, #9fc6ff);
  box-shadow: 0 0 0 4px rgba(159,198,255,0.18);
}

.hero h1 {
  font-size: clamp(48px, 8vw, 112px);
  line-height: 0.96;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
}
.h1-soft { opacity: 0.65; }

.lede {
  font-size: clamp(17px, 1.6vw, 22px);
  line-height: 1.45;
  max-width: 580px;
  opacity: 0.78;
  margin: 0 0 36px;
}

.hero-ctas {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 15px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary {
  background: #14192e;
  color: #fff;
}
.on-day .btn.primary  { background: #14192e; color: #fff; }
.on-night .btn.primary { background: #f0f3ff; color: #06091a; }
.btn.ghost {
  border: 1px solid currentColor;
  opacity: 0.85;
}
.btn.ghost:hover { opacity: 1; }

.scroll-hint {
  margin-top: 80px;
  font-size: 13px;
  letter-spacing: 0.2em;
  opacity: 0.5;
  text-transform: uppercase;
  animation: bob 2.4s ease-in-out infinite;
}
.anim-off .scroll-hint { animation: none; }
@keyframes bob {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(6px); opacity: 0.85; }
}

/* ── Sky stage (drives day→night) ───────────────────────────── */
.sky-stage {
  position: relative;
  z-index: 1;
  /* Long enough for the sky to fade and constellations to draw in,
     short enough that the directory doesn't feel like dead space away. */
  height: 130vh;
}
.sky-stage-marker {
  position: sticky;
  top: 40%;
  display: none; /* hidden — purely a scroll driver */
}
.sky-stage-num {
  color: rgba(255,255,255,0.4);
  font-size: 13px;
}

/* ── Section headers ────────────────────────────────────────── */
.section-head {
  max-width: 720px;
  margin: 0 0 56px;
}
.kicker {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.5;
  margin: 0 0 18px;
}
.section-head h2 {
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  text-wrap: pretty;
}
.section-lede {
  font-size: 20px;
  line-height: 1.55;
  opacity: 0.72;
  margin: 0;
  text-wrap: pretty;
}

/* ── Repos ──────────────────────────────────────────────────── */
.repos {
  position: relative;
  z-index: 1;
  padding: 140px 36px 120px;
  background: linear-gradient(180deg, rgba(6,9,26,0) 0%, rgba(6,9,26,0.55) 12%, #06091a 30%);
  color: #e7eaf5;
}
.repo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  overflow: hidden;
}
@media (max-width: 760px) {
  .repo-grid { grid-template-columns: 1fr; }
}
.repo-card {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 20px;
  padding: 28px 28px 26px;
  background: rgba(10, 14, 36, 0.78);
  transition: background 0.2s ease;
}
.repo-card:hover { background: rgba(15, 20, 50, 0.92); }
.repo-card.flagship {
  background: rgba(14, 20, 48, 0.85);
}
.repo-card.flagship:hover { background: rgba(20, 28, 60, 0.95); }
.repo-chip {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.repo-chip svg {
  border-radius: 8px;
  background: radial-gradient(circle at 50% 50%, rgba(159,198,255,0.05), transparent 70%);
}
.repo-logo {
  display: block;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(143,180,255,0.10), transparent 65%);
}
.repo-meta header h3 {
  font-size: 25px;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
  color: #fff;
}
.repo-meta header .tag {
  font-size: 15px;
  opacity: 0.6;
  margin: 0 0 14px;
}
.summary {
  font-size: 17px;
  line-height: 1.55;
  opacity: 0.78;
  margin: 0 0 18px;
  text-wrap: pretty;
}
.repo-card footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  opacity: 0.65;
}
.lang { display: inline-flex; align-items: center; gap: 6px; }
.lang .dot { width: 8px; height: 8px; border-radius: 50%; }
.sep { opacity: 0.35; }
.updated { opacity: 0.55; }
.repo-link {
  margin-left: auto;
  color: var(--accent, #9fc6ff);
  opacity: 0.95;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.repo-link:hover { opacity: 1; transform: translateX(2px); }

/* ── Contribute ─────────────────────────────────────────────── */
.contribute {
  position: relative;
  z-index: 1;
  padding: 100px 36px 120px;
  background: #06091a;
  color: #e7eaf5;
}
.contribute .section-head h2 {
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: -0.01em;
  opacity: 0.95;
  max-width: 760px;
  line-height: 1.35;
}
.steps {
  list-style: none;
  padding: 0;
  margin: 56px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  overflow: hidden;
}
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; }
}
.steps li {
  padding: 32px 28px;
  background: rgba(10, 14, 36, 0.78);
  transition: background 0.2s ease;
}
.steps li:hover { background: rgba(15, 20, 50, 0.92); }
.step-k {
  display: block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent, #9fc6ff);
  opacity: 0.75;
  margin-bottom: 16px;
}
.steps h3 {
  font-size: 23px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: #fff;
}
.steps p {
  font-size: 16px;
  line-height: 1.55;
  margin: 0;
  opacity: 0.72;
}

/* ── Footer ─────────────────────────────────────────────────── */
.page-footer {
  position: relative;
  z-index: 1;
  padding: 56px 36px;
  background: #06091a;
  color: #c2c8de;
  font-size: 14px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.foot-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  opacity: 0.7;
}
.foot-sep { opacity: 0.4; }
.foot-meta {
  margin-top: 14px;
  opacity: 0.4;
  letter-spacing: 0.08em;
  text-transform: lowercase;
}