/* NEXUS — Astronomía desde los cielos del sur */

:root {
  --space-900: #05070f;
  --space-800: #0b1026;
  --space-700: #131a39;
  --space-600: #1c244c;
  --nebula: #6c5ce7;
  --nebula-soft: #8b7fe8;
  --star-gold: #e8c97a;
  --aurora: #7fd8c8;
  --starlight: #eaedf6;
  --muted: #99a2c2;
  --line: rgba(234, 237, 246, 0.12);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--space-900);
  color: var(--starlight);
  font-family: "Spectral", Georgia, serif;
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- ambient deep-space backdrop ---- */
.sky-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(108, 92, 231, 0.22), transparent 60%),
    radial-gradient(900px 600px at 8% 110%, rgba(127, 216, 200, 0.10), transparent 60%),
    linear-gradient(180deg, var(--space-900) 0%, var(--space-800) 45%, var(--space-900) 100%);
}
.sky-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.9), transparent),
    radial-gradient(1px 1px at 75% 18%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 88% 62%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 12% 82%, rgba(255,255,255,0.7), transparent),
    radial-gradient(2px 2px at 60% 40%, rgba(232,201,122,0.8), transparent),
    radial-gradient(1px 1px at 33% 12%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 92% 88%, rgba(255,255,255,0.5), transparent);
  opacity: 0.7;
}

/* ---- layout ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

a { color: var(--aurora); text-decoration: none; }
a:hover { color: var(--star-gold); }

/* ---- header ---- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(5, 7, 15, 0.72);
  border-bottom: 1px solid var(--line);
}
.head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  letter-spacing: 0.32em;
  font-size: 1.15rem;
  color: var(--starlight);
}
.brand .dot { color: var(--star-gold); }
.brand small {
  font-family: "Space Mono", monospace;
  letter-spacing: 0.18em;
  font-size: 0.6rem;
  color: var(--muted);
  text-transform: uppercase;
}
.nav { display: flex; gap: 26px; }
.nav a {
  color: var(--muted);
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav a:hover, .nav a.is-active { color: var(--starlight); }
.nav-toggle { display: none; background: none; border: 0; color: var(--starlight); font-size: 1.4rem; cursor: pointer; }

/* ---- hero ---- */
.hero {
  position: relative;
  padding: 96px 0 64px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}
.eyebrow {
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--aurora);
  margin: 0 0 18px;
}
.hero h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.02;
  margin: 0 0 22px;
  letter-spacing: -0.01em;
}
.hero h1 em { font-style: italic; color: var(--star-gold); }
.lede { color: var(--muted); font-size: 1.15rem; max-width: 38ch; }

/* signature: southern cross */
.cross-stage {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  background:
    radial-gradient(120% 120% at 70% 20%, rgba(108,92,231,0.18), transparent 55%),
    rgba(11, 16, 38, 0.55);
  border: 1px solid var(--line);
  overflow: hidden;
}
.cross-stage svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.cross-stage .cap {
  position: absolute;
  left: 18px;
  bottom: 14px;
  font-family: "Space Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.twk { animation: twinkle 3.6s ease-in-out infinite; }
.twk:nth-child(2) { animation-delay: 0.8s; }
.twk:nth-child(3) { animation-delay: 1.5s; }
.twk:nth-child(4) { animation-delay: 2.2s; }
.twk:nth-child(5) { animation-delay: 1.1s; }
@keyframes twinkle { 0%,100% { opacity: 1; } 50% { opacity: 0.45; } }

.line-draw { stroke-dasharray: 600; stroke-dashoffset: 600; animation: draw 2.4s ease forwards 0.3s; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ---- buttons ---- */
.btn-row { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.btn-primary { background: var(--star-gold); color: #1a1407; font-weight: 700; }
.btn-primary:hover { background: #f1d68d; color: #1a1407; }
.btn-ghost { border: 1px solid var(--line); color: var(--starlight); }
.btn-ghost:hover { border-color: var(--aurora); color: var(--starlight); }

/* ---- sections ---- */
section.block { padding: 64px 0; }
.kicker {
  font-family: "Space Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--aurora);
  margin: 0 0 12px;
}
h2.title {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.08;
  margin: 0 0 18px;
}
.intro-p { color: var(--muted); max-width: 62ch; }

/* ---- nexus thesis ---- */
.thesis {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
  text-align: center;
}
.thesis p {
  font-family: "Fraunces", Georgia, serif;
  font-style: italic;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1.4;
  max-width: 24ch;
  margin: 0 auto;
}
.thesis p span { color: var(--star-gold); }

/* ---- card grid ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 24px;
  background: rgba(11, 16, 38, 0.4);
  transition: transform 0.25s ease, border-color 0.25s ease;
  display: block;
}
.card:hover { transform: translateY(-4px); border-color: rgba(127,216,200,0.4); }
.card .idx {
  font-family: "Space Mono", monospace;
  font-size: 0.7rem;
  color: var(--star-gold);
  letter-spacing: 0.1em;
}
.card h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 1.35rem;
  margin: 8px 0 10px;
  color: var(--starlight);
}
.card p { color: var(--muted); font-size: 0.98rem; margin: 0; }

/* ---- olimpia ---- */
.author {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 40px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px;
  background:
    radial-gradient(100% 140% at 0% 0%, rgba(108,92,231,0.16), transparent 60%),
    rgba(11, 16, 38, 0.5);
}
.author .orb {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background:
    radial-gradient(60% 60% at 35% 30%, rgba(232,201,122,0.9), rgba(232,201,122,0.1) 60%),
    radial-gradient(120% 120% at 70% 80%, var(--nebula), var(--space-800));
  box-shadow: 0 0 60px rgba(108,92,231,0.35) inset, 0 20px 60px rgba(0,0,0,0.4);
  max-width: 240px;
  margin: 0 auto;
}
.author-photo {
  display: block;
  width: 100%;
  max-height: 340px;
  object-fit: cover;
  object-position: 50% 32%;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.author h2 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 2rem; margin: 0 0 14px; }
.author p { color: var(--muted); }

/* ---- content pages ---- */
.page-head { padding: 80px 0 28px; border-bottom: 1px solid var(--line); }
.page-head h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 14px 0 14px;
  line-height: 1.05;
}
.page-head .lede { color: var(--muted); max-width: 60ch; }

.prose { padding: 48px 0 24px; max-width: 760px; }
.prose h2 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.7rem; margin: 40px 0 12px; }
.prose h3 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.25rem; margin: 28px 0 8px; color: var(--star-gold); }
.prose p { color: #cdd3e8; }
.prose ul { color: #cdd3e8; padding-left: 1.1em; }
.prose li { margin: 6px 0; }

/* constellation entries */
.const {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.const .map {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5,7,15,0.6);
  aspect-ratio: 1 / 1;
}
.const h3 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.4rem; margin: 0 0 6px; }
.const .lat { font-family: "Space Mono", monospace; font-size: 0.7rem; color: var(--star-gold); letter-spacing: 0.1em; }
.const p { color: var(--muted); margin: 10px 0 0; font-size: 0.98rem; }

/* data table */
.cal { width: 100%; border-collapse: collapse; margin-top: 28px; font-size: 0.95rem; }
.cal th, .cal td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.cal th {
  font-family: "Space Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--aurora);
}
.cal td.when { font-family: "Space Mono", monospace; color: var(--star-gold); white-space: nowrap; font-size: 0.85rem; }
.cal td .ev { color: var(--starlight); font-weight: 600; }
.cal td .desc { color: var(--muted); font-size: 0.9rem; }

/* glossary */
.gloss { columns: 2; column-gap: 48px; padding: 36px 0; }
.gloss dl { break-inside: avoid; margin: 0 0 22px; }
.gloss dt { font-family: "Fraunces", Georgia, serif; font-weight: 600; color: var(--star-gold); font-size: 1.05rem; }
.gloss dd { margin: 4px 0 0; color: var(--muted); font-size: 0.94rem; }

/* sky guide regions */
.region { padding: 30px 0; border-bottom: 1px solid var(--line); }
.region h3 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.5rem; margin: 0 0 6px; }
.region .tag { font-family: "Space Mono", monospace; font-size: 0.68rem; color: var(--aurora); letter-spacing: 0.12em; text-transform: uppercase; }
.region p { color: var(--muted); margin: 12px 0 0; }
.region ul { color: var(--muted); margin: 10px 0 0; }

/* blog list */
.posts { padding: 36px 0; display: grid; gap: 26px; }
.post {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px 30px;
  background: rgba(11,16,38,0.4);
}
.post .meta { font-family: "Space Mono", monospace; font-size: 0.68rem; color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; }
.post h2 { font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.5rem; margin: 8px 0 10px; }
.post p { color: var(--muted); margin: 0; }

/* book */
.book-hero { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 44px; align-items: center; padding: 56px 0; }
.book-cover {
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  background:
    linear-gradient(160deg, var(--space-700), var(--space-900)),
    radial-gradient(80% 60% at 50% 20%, rgba(108,92,231,0.4), transparent);
  border: 1px solid var(--line);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
  max-width: 320px;
}
.book-cover .bc-title {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 28px;
}
.book-cover .bc-title .t { font-family: "Fraunces", Georgia, serif; font-style: italic; font-size: 1.8rem; color: var(--star-gold); }
.book-cover .bc-title .a { font-family: "Space Mono", monospace; font-size: 0.7rem; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }

/* ---- footer ---- */
.site-foot {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 48px 0 60px;
}
.foot-row { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.foot-brand { font-family: "Fraunces", Georgia, serif; letter-spacing: 0.3em; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-links a { color: var(--muted); font-family: "Space Mono", monospace; font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; }
.foot-note { color: var(--muted); font-size: 0.82rem; margin-top: 28px; font-family: "Space Mono", monospace; letter-spacing: 0.04em; }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 60px; }
  .cross-stage { max-width: 420px; }
  .author { grid-template-columns: 1fr; text-align: center; }
  .author .orb { max-width: 180px; }
  .author-photo { max-width: 280px; margin: 0 auto; }
  .book-hero { grid-template-columns: 1fr; }
  .const { grid-template-columns: 120px 1fr; }
  .gloss { columns: 1; }
  .nav { display: none; }
  .nav.open {
    display: flex; flex-direction: column; gap: 18px;
    position: absolute; top: 70px; right: 0; left: 0;
    background: rgba(5,7,15,0.97); padding: 24px; border-bottom: 1px solid var(--line);
  }
  .nav-toggle { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  .twk, .line-draw { animation: none; }
  .line-draw { stroke-dashoffset: 0; }
  html { scroll-behavior: auto; }
}

/* ---- imagery: full-bleed showcase ---- */
.showcase {
  position: relative;
  margin-top: 8px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.showcase img { display: block; width: 100%; height: auto; }
.showcase .scrim {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 40px 0 24px;
  background: linear-gradient(0deg, rgba(5,7,15,0.92), rgba(5,7,15,0.45) 55%, rgba(5,7,15,0));
}
.showcase .scrim p {
  margin: 0;
  max-width: 46ch;
  font-family: "Fraunces", Georgia, serif;
  font-style: italic;
  font-size: clamp(1.1rem, 2.4vw, 1.65rem);
  line-height: 1.35;
  color: var(--starlight);
}
.showcase .scrim .tag {
  display: block; margin-bottom: 8px;
  font-family: "Space Mono", monospace; font-style: normal;
  font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--aurora);
}

/* ---- imagery: contained promo bands ---- */
.promo {
  margin: 8px 0 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(11,16,38,0.4);
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}
.promo img { display: block; width: 100%; height: auto; }

:focus-visible { outline: 2px solid var(--aurora); outline-offset: 3px; border-radius: 4px; }