/* ==========================================================================
   The Keepers of the Cosmos — stylesheet
   Palette:
     --bg:        #0A0A14  (deep space)
     --surface:   #14141F  (panel)
     --surface-2: #1C1C2B  (raised panel / card hover)
     --text:      #ECE9E2  (starlight)
     --text-mute: #8E8CA3  (nebula grey)
     --accent:    #9B7EDE  (nebula violet)
     --accent-2:  #4FD8C4  (comet teal)
     --accent-3:  #E8A75D  (star gold — used sparingly, hover/active only)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #0A0A14;
  --surface: #14141F;
  --surface-2: #1C1C2B;
  --text: #ECE9E2;
  --text-mute: #8E8CA3;
  --accent: #9B7EDE;
  --accent-2: #4FD8C4;
  --accent-3: #E8A75D;
  --accent-magenta: #F0399E;
  --border: rgba(236, 233, 226, 0.08);
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
}

h1, h2, h3, .display {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-nav .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.site-nav .logo span { color: var(--accent-2); }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.site-nav a.nav-link {
  font-size: 0.92rem;
  color: var(--text-mute);
  transition: color 0.2s ease;
}

.site-nav a.nav-link:hover,
.site-nav a.nav-link.active {
  color: var(--text);
}

.site-nav .nav-right {
  display: flex;
  align-items: center;
  gap: 26px;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-icon {
  display: flex;
  color: var(--text-mute);
  transition: color 0.2s ease, transform 0.2s ease;
}

.social-icon:hover {
  color: var(--accent-2);
  transform: translateY(-1px);
}

.social-icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.friend-links-row {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.82rem;
}

.friend-links-label {
  color: var(--text-mute);
}

footer a.friend-link {
  color: var(--text-mute);
  transition: color 0.2s ease;
}

footer a.friend-link:hover {
  color: var(--accent-2);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 90px;
  border-bottom: 1px solid var(--border);
}

.hero canvas#starfield {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.6;
}

.hero .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
}

.hero .hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(10,10,20,0.45) 0%, rgba(10,10,20,0.88) 100%);
}

.hero .container {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.08;
}

.hero h1.hero-title {
  color: var(--accent-magenta);
}

.hero p.lede {
  margin-top: 20px;
  font-size: 1.08rem;
  color: var(--text-mute);
  max-width: 52ch;
}

.hero .cta-row {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #0A0A14;
  border-color: var(--accent);
}

.btn-primary:hover { transform: translateY(-1px); background: #ab92e4; }

.btn-ghost { color: var(--text); }
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* ---------- Section headers ---------- */
.section {
  padding: 70px 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-head h2 { font-size: 1.6rem; }

.section-head p { color: var(--text-mute); font-size: 0.92rem; margin: 0; }

/* ---------- Constellation chapter nav (homepage) ---------- */
.constellation {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  padding-top: 8px;
}

.chapter-node {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.chapter-node .cover-thumb {
  display: block;
  margin: -22px -20px 16px;
  width: calc(100% + 40px);
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.chapter-node:hover {
  border-color: var(--accent);
  background: var(--surface-2);
  transform: translateY(-3px);
}

.chapter-node .num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  color: var(--accent-2);
  letter-spacing: 0.08em;
}

.chapter-node h3 {
  font-size: 1.05rem;
  margin-top: 8px;
}

.chapter-node p {
  color: var(--text-mute);
  font-size: 0.86rem;
  margin: 8px 0 0;
}

.chapter-node .status {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-3);
}

/* ---------- Gallery page: tabs ---------- */
.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.tab-btn {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--text-mute);
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s ease;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
  background: var(--accent);
  color: #0A0A14;
  border-color: var(--accent);
}

.chapter-panel { display: none; }
.chapter-panel.active { display: block; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}

.gallery-grid figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  background: var(--surface);
  aspect-ratio: 3/4;
}

.gallery-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-grid figure:hover img { transform: scale(1.05); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(6, 6, 12, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-height: 88vh;
  max-width: 88vw;
  border-radius: 6px;
}

.lightbox .lb-close,
.lightbox .lb-prev,
.lightbox .lb-next {
  position: absolute;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 10px;
}

.lightbox .lb-close { top: 20px; right: 24px; }
.lightbox .lb-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next { right: 20px; top: 50%; transform: translateY(-50%); }

.lightbox .lb-prev:hover,
.lightbox .lb-next:hover,
.lightbox .lb-close:hover { color: var(--accent-2); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 34px 0;
  color: var(--text-mute);
  font-size: 0.85rem;
}

footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer a:hover { color: var(--accent-2); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chapter-node, .btn, .gallery-grid img { transition: none; }
}

@media (max-width: 640px) {
  .site-nav ul { gap: 16px; }
  .site-nav .nav-right { gap: 14px; }
  .social-links { gap: 10px; }
  .hero { padding: 80px 0 60px; }
}