@import url('https://fonts.googleapis.com/css2?family=Anton&family=DM+Sans:ital,wght@0,200;0,300;0,400;0,500;1,300&display=swap');

:root {
  --abyss: #020100;
  --corona: #0f0800;
  --flare: #1a0c00;
  --photon: #ffdb6a;
  --solar: #ff9500;
  --chromosphere: #ff5500;
  --plasma: #fff5c0;
  --white-hot: #fffff0;
  --dim: rgba(255,180,0,0.12);
  --border: rgba(255,150,0,0.2);
  --text: #c8980a;
  --text-muted: #6a4800;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--abyss);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

#sol-canvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 50% 50%, rgba(255,150,0,0.04) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.wrap { position: relative; z-index: 2; max-width: 1040px; margin: 0 auto; padding: 0 28px 90px; }

/* ── HERO ── */
.hero {
  padding: 60px 0 50px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
}

.hero-tag {
  font-size: 0.65rem;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--solar);
  opacity: 0.6;
  font-weight: 500;
  margin-bottom: 14px;
}

.hero h1 {
  font-family: 'Anton', sans-serif;
  font-size: clamp(5rem, 15vw, 11rem);
  line-height: 0.85;
  color: var(--white-hot);
  letter-spacing: 2px;
  text-shadow: 0 0 40px rgba(255,180,0,0.4), 0 0 80px rgba(255,120,0,0.2);
}

.hero h1 span {
  display: block;
  font-size: 0.22em;
  font-family: 'DM Sans', sans-serif;
  font-weight: 200;
  letter-spacing: 6px;
  color: var(--solar);
  text-shadow: none;
  text-transform: uppercase;
  margin-top: 10px;
}

.hero-desc { font-size: 0.97rem; line-height: 1.82; color: var(--text-muted); font-weight: 300; margin-top: 16px; }

/* ── Sun visual ── */
#sun-vis {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  position: relative;
  background: radial-gradient(circle at 40% 35%, #fffff0 0%, #ffee80 20%, #ffb300 50%, #ff7700 75%, #cc3300 100%);
  box-shadow: 0 0 40px rgba(255,180,0,0.5), 0 0 80px rgba(255,120,0,0.3), 0 0 150px rgba(255,80,0,0.15);
  animation: sun-pulse 4s ease-in-out infinite alternate;
}

.corona-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,200,50,0.15);
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  animation: corona-spin 20s linear infinite;
}

@keyframes sun-pulse {
  0%   { box-shadow: 0 0 40px rgba(255,180,0,0.5), 0 0 80px rgba(255,120,0,0.3), 0 0 150px rgba(255,80,0,0.15); }
  100% { box-shadow: 0 0 60px rgba(255,200,0,0.7), 0 0 120px rgba(255,140,0,0.4), 0 0 200px rgba(255,80,0,0.2); }
}

@keyframes corona-spin {
  from { transform: translate(-50%,-50%) rotate(0deg); }
  to   { transform: translate(-50%,-50%) rotate(360deg); }
}

/* ── Data cells ── */
.data-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 60px;
}

.d-cell { padding: 18px 10px; border-right: 1px solid var(--border); background: var(--corona); transition: background 0.2s; }
.d-cell:last-child { border-right: none; }
.d-cell:hover { background: var(--dim); }
.d-label { font-size: 0.58rem; letter-spacing: 2px; text-transform: uppercase; color: var(--solar); opacity: 0.55; margin-bottom: 6px; font-weight: 500; }
.d-value { font-family: 'Anton', sans-serif; font-size: 1.2rem; color: var(--plasma); letter-spacing: 1px; line-height: 1.1; }
.d-unit { font-size: 0.62rem; color: var(--text-muted); font-family: 'DM Sans', sans-serif; }

/* ── Sections ── */
.section { margin-bottom: 56px; opacity: 0; transform: translateY(18px); transition: opacity 0.65s, transform 0.65s; }
.section.visible { opacity: 1; transform: none; }

.sh { display: flex; align-items: baseline; gap: 14px; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.sn { font-size: 0.6rem; letter-spacing: 3px; text-transform: uppercase; color: var(--solar); opacity: 0.45; font-weight: 500; }
.section h2 { font-family: 'Anton', sans-serif; font-size: 1.7rem; color: var(--plasma); letter-spacing: 2px; text-transform: uppercase; }

p { font-size: 0.95rem; line-height: 1.85; color: var(--text-muted); font-weight: 300; margin-bottom: 14px; }
strong { color: var(--photon); font-weight: 500; }

/* ── Layer diagram ── */
.layers { margin-top: 18px; }
.layer-row {
  display: grid;
  grid-template-columns: 160px 1fr 100px;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.layer-row:last-child { border-bottom: none; }
.layer-name { font-size: 0.9rem; font-weight: 500; color: var(--plasma); }
.layer-temp { font-family: 'Anton', sans-serif; font-size: 1rem; color: var(--photon); text-align: right; letter-spacing: 1px; }
.layer-bar { height: 4px; background: var(--corona); border-radius: 2px; overflow: hidden; }
.layer-fill { height: 100%; border-radius: 2px; }

/* ── Activity grid ── */
.activity-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px,1fr)); gap: 12px; margin-top: 18px; }
.act-card { background: var(--corona); border: 1px solid var(--border); border-top: 2px solid var(--solar); border-radius: 4px; padding: 20px; transition: box-shadow 0.2s; }
.act-card:hover { box-shadow: 0 6px 20px rgba(255,150,0,0.12); }
.act-icon { font-size: 1.5rem; margin-bottom: 8px; }
.act-card h3 { font-size: 0.85rem; font-weight: 600; color: var(--plasma); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 7px; }
.act-card p { font-size: 0.8rem; margin: 0; line-height: 1.55; }

/* ── Helioshere diagram ── */
.helio-strip { display: grid; grid-template-columns: repeat(5,1fr); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; margin-top: 18px; }
.hs { padding: 16px 12px; background: var(--corona); border-right: 1px solid var(--border); text-align: center; transition: background 0.2s; }
.hs:last-child { border-right: none; }
.hs:hover { background: var(--dim); }
.hs-name { font-size: 0.78rem; font-weight: 600; color: var(--plasma); margin-bottom: 4px; }
.hs-dist { font-size: 0.65rem; color: var(--solar); font-weight: 500; letter-spacing: 1px; margin-bottom: 6px; }
.hs-desc { font-size: 0.72rem; color: var(--text-muted); line-height: 1.4; }

/* ── Missions ── */
.mission-list { margin-top: 18px; }
.mi { display: grid; grid-template-columns: 100px 1fr; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--border); align-items: start; }
.mi:last-child { border-bottom: none; }
.mi-year { font-family: 'Anton', sans-serif; font-size: 1rem; color: var(--solar); letter-spacing: 1px; }
.mi-name { font-size: 0.88rem; font-weight: 600; color: var(--plasma); margin-bottom: 3px; text-transform: uppercase; letter-spacing: 0.5px; }
.mi p { font-size: 0.8rem; margin: 0; line-height: 1.5; }

/* ── Footer ── */
.footer-band { margin-top: 70px; border-top: 1px solid var(--border); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-band span { font-size: 0.6rem; letter-spacing: 2px; color: var(--text-muted); text-transform: uppercase; font-weight: 500; }

@media(max-width:640px) { .hero { grid-template-columns: 1fr; } #sun-vis { width:180px;height:180px;margin:0 auto; } .data-row { grid-template-columns: repeat(3,1fr); } .helio-strip { grid-template-columns: 1fr; } }