/* =================================================================
   Space Explorer for Kids — styles
   Big text, bright colours, rounded shapes, high contrast.
   ================================================================= */

:root {
  --space-0: #060818;
  --space-1: #0d1030;
  --panel: rgba(23, 28, 74, 0.82);
  --panel-2: rgba(16, 20, 54, 0.9);
  --border: rgba(160, 180, 255, 0.28);

  --ink: #f2f5ff;
  --ink-soft: #c3ccf0;

  --accent: #ffd94a;
  --accent-2: #63e6ff;
  --accent-3: #ff8fd4;
  --accent-4: #8affc1;

  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --font-body: "Trebuchet MS", "Segoe UI", Verdana, system-ui, sans-serif;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1100px 700px at 15% -10%, #2a1d5e 0%, transparent 60%),
    radial-gradient(900px 600px at 95% 10%, #10305e 0%, transparent 55%),
    linear-gradient(180deg, var(--space-1) 0%, var(--space-0) 100%);
  background-attachment: fixed;
}

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.site-header, main, .site-footer { position: relative; z-index: 1; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.3rem); }
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }
h4 { font-size: 1.05rem; margin: 0 0 .4em; }
p  { margin: 0 0 1em; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 50;
  background: var(--accent); color: #221a00; padding: 10px 18px;
  border-radius: var(--radius-sm); font-weight: bold; text-decoration: none;
}
.skip-link:focus { left: 8px; }

:focus-visible { outline: 4px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------------- Loading screen ---------------- */

.load-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #0e1234 0%, #05060f 100%);
  transition: opacity .4s ease;
}
.load-screen.is-done { opacity: 0; pointer-events: none; }

.load-inner { text-align: center; padding: 24px; max-width: 420px; }

.load-planet {
  font-size: 4rem;
  animation: float 3s ease-in-out infinite;
}

.load-title { font-size: 1.3rem; font-weight: bold; margin-bottom: 16px; }

.load-track {
  height: 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  border: 2px solid var(--border);
  overflow: hidden;
}

.load-bar {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent), var(--accent-3));
  transition: width .18s ease;
}

.load-note { margin-top: 14px; font-size: .9rem; color: var(--ink-soft); }

/* ---------------- Header + tabs ---------------- */

.site-header { padding: 22px clamp(16px, 4vw, 40px) 0; }

.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }

.brand-icon {
  font-size: clamp(2.2rem, 6vw, 3rem);
  filter: drop-shadow(0 0 12px rgba(255, 217, 74, .6));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-6deg); }
  50%      { transform: translateY(-8px) rotate(4deg); }
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  letter-spacing: .5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub { margin: 0; color: var(--ink-soft); font-size: clamp(.9rem, 2.4vw, 1.05rem); }

.tabs { display: flex; flex-wrap: wrap; gap: 10px; padding-bottom: 18px; }

.tab {
  font: inherit;
  font-weight: bold;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 11px 20px;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
}
.tab:hover { transform: translateY(-3px); border-color: var(--accent-2); }

.tab.is-active {
  background: linear-gradient(135deg, var(--accent), #ffb03a);
  color: #241a00;
  border-color: #fff0b0;
  box-shadow: 0 8px 22px rgba(255, 190, 60, .35);
}

/* ---------------- Views ---------------- */

main { padding: 8px clamp(16px, 4vw, 40px) 60px; }

.view { max-width: 1180px; margin: 0 auto; }
.view[hidden] { display: none; }

.view-intro {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 28px);
  margin-bottom: 22px;
  backdrop-filter: blur(6px);
}
.view-intro > p:last-child { margin-bottom: 0; }

.view-hint {
  margin: 14px 0 0;
  font-size: .95rem;
  color: var(--accent-2);
  font-weight: bold;
}

.section-title { margin: 34px 0 14px; padding-left: 12px; border-left: 6px solid var(--accent); }

/* ---------------- Buttons ---------------- */

.pill-btn {
  font: inherit;
  font-size: .95rem;
  font-weight: bold;
  color: var(--ink);
  background: rgba(255, 255, 255, .08);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 9px 16px;
  cursor: pointer;
  transition: background .2s ease, transform .15s ease, border-color .2s ease;
}
.pill-btn:hover { background: rgba(255, 255, 255, .18); transform: translateY(-2px); }
.pill-btn.small { padding: 6px 14px; font-size: .88rem; }

.pill-btn.is-on {
  background: linear-gradient(135deg, var(--accent-2), #3aa8d8);
  color: #05202c;
  border-color: #b7f0ff;
}

/* ---------------- Map controls ---------------- */

.map-controls {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.control-label {
  display: block;
  font-weight: bold;
  font-size: .95rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------------- The solar system map ---------------- */

.map-shell {
  background: rgba(6, 8, 24, .55);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px;
  margin-bottom: 30px;
}

.map-date-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 0 4px 12px;
}

.date-label { color: var(--ink-soft); font-size: .92rem; }
.map-date-bar strong { color: var(--accent); font-size: 1.05rem; }
.map-date-bar .pill-btn { margin-left: auto; }

.map-stage { position: relative; }

#mapCanvas {
  display: block;
  width: 100%;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at 50% 50%, rgba(60, 46, 120, .30) 0%, transparent 65%);
}

.map-tip {
  position: absolute;
  transform: translate(-50%, -100%);
  background: rgba(8, 10, 28, .95);
  border: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: .88rem;
  font-weight: bold;
  white-space: nowrap;
  pointer-events: none;
  z-index: 3;
}
.map-tip[hidden] { display: none; }

.map-foot {
  margin: 12px 4px 0;
  font-size: .85rem;
  color: var(--ink-soft);
}

/* ---------------- Card grids ---------------- */

.planet-grid-wrap { margin-top: 10px; }
.grid-title { margin-bottom: 14px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(235px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-2);
  background: rgba(40, 50, 110, .9);
}

.card-art {
  display: grid;
  place-items: center;
  width: 100%;
  height: 74px;
  margin-bottom: 2px;
}
.card-art canvas { max-width: 100%; max-height: 100%; }

.card-name { font-size: 1.2rem; font-weight: bold; margin: 0; }
.card-kind { margin: 0; font-size: .82rem; color: var(--accent-2); font-weight: bold; }
.card-tag  { margin: 0; font-size: .93rem; color: var(--ink-soft); }
.card-more { margin-top: auto; padding-top: 8px; font-size: .9rem; font-weight: bold; color: var(--accent); }

/* Smaller info tiles (stars, universe topics) */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}

.mini-card {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}
.mini-card h4 { display: flex; align-items: center; gap: 8px; }
.mini-card p { margin: 0; font-size: .95rem; color: var(--ink-soft); }

/* ---------------- Stars view ---------------- */

.sun-callout {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(120deg, rgba(255, 190, 60, .22), rgba(255, 120, 0, .10));
  border: 2px solid rgba(255, 210, 100, .5);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: transform .18s ease;
}
.sun-callout:hover { transform: translateY(-4px); }
.sun-callout h3 { margin: 0 0 4px; }
.sun-callout p  { margin: 0; color: var(--ink-soft); }

.sun-callout-orb {
  flex: none;
  width: 96px; height: 96px;
  filter: drop-shadow(0 0 24px rgba(255, 170, 40, .75));
}
.sun-callout-orb canvas { display: block; border-radius: 50%; }

.info-box {
  margin-top: 30px;
  background: var(--panel);
  border: 2px solid var(--border);
  border-left: 8px solid var(--accent-4);
  border-radius: var(--radius-md);
  padding: 22px;
}
.info-box h3 { margin-top: 0; }

.life-cycle { margin: 0; padding-left: 22px; }
.life-cycle li { margin-bottom: 10px; }
.life-cycle strong { color: var(--accent); }

/* ---------------- Galaxies view ---------------- */

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Our own galaxy, featured above the gallery */
.home-galaxy {
  display: flex;
  align-items: center;
  gap: 26px;
  background: linear-gradient(120deg, rgba(120, 90, 220, .24), rgba(60, 120, 220, .12));
  border: 2px solid rgba(170, 160, 255, .45);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease;
}
.home-galaxy:hover { transform: translateY(-4px); border-color: var(--accent-2); }

.home-galaxy-art {
  flex: none;
  width: 210px; height: 210px;
  display: grid;
  place-items: center;
}
.home-galaxy-art canvas {
  display: block;
  max-width: 100%;
  border-radius: 50%;
  animation: spin 150s linear infinite;
}

.home-galaxy-text { min-width: 0; }
.home-galaxy-text h3 { margin: 0 0 8px; font-size: clamp(1.4rem, 4vw, 2rem); }
.home-galaxy-text p { margin: 0 0 8px; color: var(--ink-soft); }

.home-galaxy-eyebrow {
  margin: 0 0 4px !important;
  font-size: .8rem;
  font-weight: bold;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-2) !important;
}

.home-galaxy-more { margin: 0 !important; font-weight: bold; color: var(--accent) !important; }

/* The gallery of famous galaxies */
.galaxy-grid { grid-template-columns: repeat(auto-fill, minmax(255px, 1fr)); }

.galaxy-card { align-items: stretch; }

.galaxy-card-art {
  display: grid;
  place-items: center;
  width: 100%;
  height: 170px;
  margin-bottom: 4px;
  border-radius: var(--radius-sm);
  background: radial-gradient(circle at 50% 50%, rgba(40, 30, 80, .55) 0%, rgba(6, 8, 22, .8) 70%);
  overflow: hidden;
}
.galaxy-card-art canvas { display: block; max-width: 100%; max-height: 100%; }

.card-alias { font-size: .85rem; font-weight: normal; color: var(--ink-soft); }

.galaxy-modal-art {
  border-radius: var(--radius-md);
  background: radial-gradient(circle at 50% 50%, rgba(40, 30, 80, .5) 0%, rgba(6, 8, 22, .75) 70%);
  min-width: 230px;
}
.galaxy-modal-art canvas { filter: none; }

.modal-alias { margin: 4px 0 0; font-size: .9rem; color: var(--ink-soft); font-style: italic; }

.galaxy-scale-box { border-left-color: var(--accent-2); }
.galaxy-scale-box ul { margin: 0 0 14px; padding-left: 22px; }
.galaxy-scale-box li { margin-bottom: 6px; }

.stat-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.stat-table th, .stat-table td {
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(160, 180, 255, .16);
  vertical-align: top;
}
.stat-table tr:last-child th, .stat-table tr:last-child td { border-bottom: none; }
.stat-table th { color: var(--accent-2); width: 46%; font-size: .93rem; }

.fact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }

.fact-list li {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px 14px 50px;
  position: relative;
}
.fact-list li::before { content: "⭐"; position: absolute; left: 16px; top: 13px; }

/* ---------------- Universe view ---------------- */

.wow-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.wow {
  background: linear-gradient(140deg, rgba(99, 230, 255, .16), rgba(255, 143, 212, .12));
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.wow-value { display: block; font-size: clamp(1.2rem, 3vw, 1.6rem); font-weight: bold; color: var(--accent); }
.wow-label { font-size: .88rem; color: var(--ink-soft); }

.scale-box { border-left-color: var(--accent-3); }
.scale-box ul { margin: 0 0 14px; padding-left: 22px; }
.scale-box li { margin-bottom: 6px; }
.scale-punchline { margin: 0; font-weight: bold; color: var(--accent-4); }

/* ---------------- Modal ---------------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(3, 4, 16, .80);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  padding: clamp(12px, 3vw, 30px);
  overflow-y: auto;
}
.modal-backdrop[hidden] { display: none; }

.modal {
  position: relative;
  width: min(800px, 100%);
  max-height: 90vh;
  overflow-y: auto;
  background: linear-gradient(170deg, #202763 0%, #131740 100%);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 34px);
  animation: pop-in .25s ease-out;
}

@keyframes pop-in {
  from { opacity: 0; transform: scale(.94) translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.modal-close {
  position: absolute;
  top: 14px; right: 14px;
  width: 42px; height: 42px;
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--ink);
  background: rgba(255, 255, 255, .12);
  border: 2px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  z-index: 2;
}
.modal-close:hover { background: rgba(255, 120, 120, .35); }

.modal-head {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 14px;
  padding-right: 50px;
}

.modal-art {
  flex: none;
  display: grid;
  place-items: center;
  min-width: 180px;
}
.modal-art canvas { display: block; filter: drop-shadow(0 8px 26px rgba(0, 0, 0, .55)); }

.modal-titles h2 { margin: 0; }
.modal-kind { margin: 4px 0 0; color: var(--accent-2); font-weight: bold; font-size: .95rem; }
.modal-tagline { margin: 10px 0 0; font-size: 1.08rem; font-weight: bold; color: var(--accent); }
.modal-intro { font-size: 1.02rem; }

.modal h3 { margin: 30px 0 12px; padding-left: 12px; border-left: 6px solid var(--accent-3); }

.live-stamp { margin: -4px 0 12px; font-size: .88rem; color: var(--ink-soft); font-style: italic; }

/* ---------------- Moons ---------------- */

.moon-note {
  background: rgba(99, 230, 255, .12);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 18px;
}

.moon-group { margin-bottom: 22px; }

.moon-group h4 {
  color: var(--accent-4);
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.moon-group-note { margin: 0 0 12px; font-size: .9rem; color: var(--ink-soft); }

.moon-list { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 10px; }

.moon-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.moon-thumb { flex: none; }
.moon-thumb canvas { display: block; border-radius: 50%; }

.moon-text { flex: 1; min-width: 0; }
.moon-head { margin: 0 0 4px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.moon-name { font-weight: bold; color: var(--accent); font-size: 1.02rem; }
.moon-size { font-size: .8rem; color: var(--ink-soft); }
.moon-desc { margin: 0; font-size: .94rem; }

.moon-chips { display: flex; flex-wrap: wrap; gap: 8px; }

.moon-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 13px;
  font-size: .88rem;
}
.chip-name { font-weight: bold; }
.chip-km { color: var(--ink-soft); font-size: .78rem; }

/* ---------------- Footer ---------------- */

.site-footer {
  text-align: center;
  padding: 28px 20px 40px;
  color: var(--ink-soft);
  border-top: 1px solid rgba(160, 180, 255, .16);
}
.site-footer p { margin: 0 0 6px; }
.footer-note { font-size: .85rem; opacity: .75; }

/* ---------------- Motion preferences ---------------- */

@media (prefers-reduced-motion: reduce) {
  .brand-icon, .load-planet, .home-galaxy-art canvas { animation: none !important; }
  .modal { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- Small screens ---------------- */

@media (max-width: 760px) {
  .home-galaxy { flex-direction: column; text-align: center; }
  .home-galaxy-art { width: 180px; height: 180px; }
}

@media (max-width: 620px) {
  body { font-size: 17px; }
  .tab { padding: 9px 14px; font-size: .92rem; }
  .pill-btn { font-size: .88rem; padding: 8px 13px; }
  .map-date-bar .pill-btn { margin-left: 0; }

  .modal-head { flex-direction: column; align-items: center; text-align: center; padding-right: 0; }
  .modal-art, .galaxy-modal-art { min-width: 0; }
  .modal-head h2 { font-size: 1.5rem; }

  .stat-table th, .stat-table td { display: block; width: 100%; }
  .stat-table th { border-bottom: none; padding-bottom: 0; }

  .moon-list li { flex-direction: column; align-items: center; text-align: center; }
  .moon-head { justify-content: center; }
}