/* ============================================================
   COSMOS — Revista Digital de Astronomía
   Hoja de Estilos Global
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&family=Raleway:wght@300;400;500;600&family=Courier+Prime:ital@0;1&display=swap');

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --void:        #04060f;
  --deep:        #080c1a;
  --nebula:      #0d1535;
  --accent:      #c8a96e;
  --gold:        #e8c97a;
  --silver:      #a8b8d0;
  --white:       #f0eee8;
  --muted:       #6a7a90;
  --red-dwarf:   #e05a3a;
  --blue-giant:  #4a8fd4;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Raleway', sans-serif;
  --font-mono:    'Courier Prime', monospace;

  --gap:    clamp(1rem, 3vw, 2rem);
  --radius: 2px;
  --border: 1px solid rgba(200,169,110,0.25);
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background-color: var(--void);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.75;
  overflow-x: hidden;
}

/* Star field background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 70%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 50% 30%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 85%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 20%, rgba(255,255,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 20% 50%, rgba(200,210,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 60%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 40% 10%, rgba(255,240,200,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 50%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 75% 40%, rgba(200,220,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 15% 85%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 55% 75%, rgba(255,255,255,0.9) 0%, transparent 100%);
  z-index: -2;
  pointer-events: none;
}

img { max-width: 100%; display: block; }
a  { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--gold); }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 700;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); color: var(--gold); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); color: var(--accent); margin-bottom: .5rem; }
p  { color: var(--silver); margin-bottom: 1.2rem; max-width: 70ch; }
.mono { font-family: var(--font-mono); color: var(--muted); font-size: .85rem; letter-spacing: .05em; }

/* ── Layout Utilities ───────────────────────────────────────── */
.container   { max-width: 1180px; margin: 0 auto; padding: 0 var(--gap); }
.section     { padding: clamp(4rem, 8vw, 7rem) 0; position: relative; }
.section + .section { border-top: var(--border); }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 480px), 1fr)); gap: calc(var(--gap) * 2); align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: var(--gap); }
.flex-center { display: flex; align-items: center; justify-content: center; }
.text-center { text-align: center; }
.text-center p { margin-left: auto; margin-right: auto; }

/* ── Navigation ─────────────────────────────────────────────── */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(4,6,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: var(--border);
  padding: 0 var(--gap);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 900; font-style: italic;
  color: var(--gold);
  letter-spacing: .02em;
  display: flex; align-items: center; gap: .5rem;
}
.nav-logo .star { font-style: normal; font-size: 1.1rem; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: .85rem; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--silver);
  padding: .25rem 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); border-color: var(--accent); }

/* Hamburger */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.nav-toggle span {
  width: 24px; height: 1.5px; background: var(--silver);
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: rgba(4,6,15,0.97); flex-direction: column;
    gap: 0; padding: 1rem 0;
    transform: translateY(-110%); transition: transform .3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links li { border-bottom: var(--border); }
  .nav-links a { display: block; padding: 1rem 2rem; }
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: 8rem var(--gap) 5rem;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(13,21,53,0.9) 0%, rgba(4,6,15,0.4) 70%, transparent 100%);
  z-index: -1;
}
.hero-eyebrow {
  font-family: var(--font-mono); font-size: .8rem;
  letter-spacing: .3em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.5rem;
}
.hero h1 { color: var(--white); margin-bottom: 1.5rem; }
.hero h1 em { font-style: italic; color: var(--gold); }
.hero p { font-size: clamp(1rem, 2vw, 1.2rem); margin: 0 auto 2.5rem; max-width: 56ch; }
.hero-scroll {
  position: absolute; bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono); font-size: .7rem;
  color: var(--muted); letter-spacing: .2em;
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
}
.hero-scroll::after {
  content: '';
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 1; transform: scaleY(1); transform-origin: top; }
  50% { opacity: .4; }
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: .8rem 2rem; font-size: .85rem;
  font-family: var(--font-body); font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  border: 1px solid var(--accent); color: var(--accent);
  transition: background .25s, color .25s, box-shadow .25s;
  cursor: pointer; background: transparent;
}
.btn:hover { background: var(--accent); color: var(--void); box-shadow: 0 0 30px rgba(200,169,110,.3); }
.btn-solid { background: var(--accent); color: var(--void); }
.btn-solid:hover { background: var(--gold); border-color: var(--gold); color: var(--void); }

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: rgba(13,21,53,0.5);
  border: var(--border);
  padding: 2rem;
  transition: border-color .3s, transform .3s, box-shadow .3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: opacity .3s;
}
.card:hover { border-color: rgba(200,169,110,.5); transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,.4); }
.card:hover::before { opacity: 1; }
.card-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.card-number {
  font-family: var(--font-display); font-size: 4rem;
  color: rgba(200,169,110,.1); line-height: 1;
  position: absolute; top: 1rem; right: 1.5rem;
  font-weight: 900; pointer-events: none;
}

/* ── Section Labels ──────────────────────────────────────────── */
.section-label {
  font-family: var(--font-mono); font-size: .75rem;
  letter-spacing: .3em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .75rem;
  display: flex; align-items: center; gap: 1rem;
}
.section-label::after {
  content: ''; flex: 0 0 40px; height: 1px;
  background: var(--accent);
}

/* ── Planet Visuals ──────────────────────────────────────────── */
.planet-ring {
  width: clamp(200px, 30vw, 300px);
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  margin: 0 auto;
  flex-shrink: 0;
}
.planet-ring::before {
  content: '';
  position: absolute; inset: -30%;
  border-radius: 50%;
  border: 2px solid rgba(200,169,110,.15);
  animation: orbit 20s linear infinite;
}
.planet-ring::after {
  content: '';
  position: absolute; inset: -10%;
  border-radius: 50%;
  border: 1px solid rgba(168,184,208,.1);
  animation: orbit 30s linear infinite reverse;
}
@keyframes orbit { to { transform: rotate(360deg); } }

/* ── Timeline ────────────────────────────────────────────────── */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 1px; background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item { position: relative; padding-bottom: 2.5rem; }
.timeline-item::before {
  content: '';
  position: absolute; left: -2rem; top: .4rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  margin-left: -4px;
}
.timeline-year {
  font-family: var(--font-mono); font-size: .75rem;
  color: var(--accent); letter-spacing: .15em;
  margin-bottom: .25rem;
}

/* ── Data Table ──────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.data-table th {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--accent); padding: .75rem 1rem;
  text-align: left; border-bottom: 1px solid rgba(200,169,110,.3);
}
.data-table td { padding: .75rem 1rem; color: var(--silver); border-bottom: var(--border); }
.data-table tr:hover td { background: rgba(13,21,53,.5); }

/* ── Form ────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.5rem; }
.form-label {
  display: block; font-family: var(--font-mono);
  font-size: .75rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: .5rem;
}
.form-control {
  width: 100%; padding: .9rem 1.1rem;
  background: rgba(13,21,53,.6); border: var(--border);
  color: var(--white); font-family: var(--font-body);
  font-size: .95rem; outline: none;
  transition: border-color .25s, box-shadow .25s;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(200,169,110,.1);
}
textarea.form-control { resize: vertical; min-height: 130px; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: rgba(8,12,26,0.9);
  border-top: var(--border);
  padding: 3rem var(--gap) 2rem;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 900; font-style: italic;
  color: var(--gold); margin-bottom: .5rem;
}
.footer-tagline { font-family: var(--font-mono); font-size: .75rem; color: var(--muted); letter-spacing: .2em; margin-bottom: 2rem; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; margin-bottom: 2rem; list-style: none; }
.footer-links a { font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.footer-links a:hover { color: var(--accent); }
.footer-copy { font-size: .78rem; color: var(--muted); font-family: var(--font-mono); }
.footer-separator { width: 60px; height: 1px; background: var(--accent); margin: 1.5rem auto; opacity: .4; }

/* ── Decorative ──────────────────────────────────────────────── */
.divider {
  display: flex; align-items: center; gap: 1rem;
  margin: 2rem 0; color: var(--muted);
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .2em;
}
.divider::before, .divider::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(to right, transparent, rgba(200,169,110,.3), transparent);
}
.glow-text { text-shadow: 0 0 30px rgba(200,169,110,.4); }
.highlight { color: var(--accent); }
.tag {
  display: inline-block;
  font-family: var(--font-mono); font-size: .7rem;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--void); background: var(--accent);
  padding: .2rem .6rem; margin-right: .4rem; margin-bottom: .4rem;
}
.quote-block {
  border-left: 2px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: rgba(13,21,53,.3);
  font-family: var(--font-display); font-style: italic;
  font-size: 1.1rem; color: var(--white);
}
.quote-block cite {
  display: block; margin-top: .75rem;
  font-family: var(--font-mono); font-size: .75rem;
  font-style: normal; color: var(--accent); letter-spacing: .1em;
}

/* ── Hero image placeholder using CSS art ───────────────────── */
.hero-cosmos {
  position: absolute; inset: 0; z-index: -1; overflow: hidden;
}
.hero-cosmos::before {
  content: '';
  position: absolute;
  width: clamp(300px, 50vw, 600px);
  aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(ellipse at 35% 35%,
    #6a4fd4 0%, #2a2060 30%, #0d1535 60%, transparent 80%);
  top: 50%; left: 50%; transform: translate(-20%, -50%);
  box-shadow: inset -40px -30px 60px rgba(0,0,40,.5),
              0 0 80px rgba(106,79,212,.15);
  opacity: .6;
}
.hero-cosmos::after {
  content: '';
  position: absolute;
  width: clamp(200px, 30vw, 360px); aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(ellipse at 40% 30%,
    #c05020 0%, #701a0a 40%, #0d1535 70%, transparent 85%);
  bottom: 10%; right: 5%;
  box-shadow: inset -30px -20px 50px rgba(40,0,0,.5),
              0 0 60px rgba(192,80,32,.1);
  opacity: .5;
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate { animation: fadeUp .7s ease both; }
.delay-1 { animation-delay: .15s; }
.delay-2 { animation-delay: .3s; }
.delay-3 { animation-delay: .45s; }
.delay-4 { animation-delay: .6s; }

/* ── Responsive adjustments ──────────────────────────────────── */
@media (max-width: 640px) {
  .grid-2 { gap: var(--gap); }
  .card   { padding: 1.5rem; }
  .hero   { padding-top: 6rem; }
}

/* ── Page-specific: planet badges ───────────────────────────── */
.planet-badge {
  width: 60px; height: 60px; border-radius: 50%;
  display: inline-block; flex-shrink: 0; margin-bottom: .75rem;
  box-shadow: inset -8px -6px 20px rgba(0,0,0,.5);
}
.pb-sun    { background: radial-gradient(at 35% 30%, #ffe87a, #f59b20, #c04010); }
.pb-mercury{ background: radial-gradient(at 35% 30%, #c8c8c8, #808080, #404040); }
.pb-venus  { background: radial-gradient(at 35% 30%, #f0d890, #d4a44a, #8a6020); }
.pb-earth  { background: radial-gradient(at 35% 30%, #5ab8f0, #2a70d0, #1a4488); }
.pb-mars   { background: radial-gradient(at 35% 30%, #d0703a, #a03818, #5a1a08); }
.pb-jupiter{ background: radial-gradient(at 35% 30%, #d4b08a, #b07a50, #6a3820); }
.pb-saturn { background: radial-gradient(at 35% 30%, #d8c890, #b0985a, #705828); }
.pb-uranus { background: radial-gradient(at 35% 30%, #90d8e8, #5098b8, #204858); }
.pb-neptune{ background: radial-gradient(at 35% 30%, #4070d8, #203898, #101848); }