/* ─── Universe Homepage Dark Theme ─── */
body.universe-page {
  background: #050510;
  color: #fff;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Stars */
.stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.star {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  animation: twinkle 3s infinite alternate;
}

@keyframes twinkle {
  0%   { opacity: 0.1; }
  100% { opacity: 0.8; }
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
  z-index: 100;
}

.nav-name {
  font-size: 12px;
  letter-spacing: 4px;
  opacity: 0.45;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 12px;
  opacity: 0.35;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-links a { transition: opacity 0.2s; }
.nav-links a:hover { opacity: 1; }

/* Main layout */
.universe-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 100px 24px 60px;
  position: relative;
  z-index: 10;
}

.hero-text {
  text-align: center;
  margin-bottom: 64px;
}

.hero-title {
  font-size: 13px;
  letter-spacing: 5px;
  text-transform: uppercase;
  opacity: 0.28;
  font-weight: 400;
  margin-bottom: 10px;
}

.hero-sub {
  font-size: 10px;
  letter-spacing: 2.5px;
  opacity: 0.16;
  text-transform: uppercase;
}

/* Planets */
.planets-row {
  display: flex;
  gap: 80px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.planet-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.planet-wrap:hover { transform: translateY(-14px); }

.planet {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  position: relative;
  transition: box-shadow 0.35s;
}

.ring {
  position: absolute;
  width: 158px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid rgba(167, 139, 250, 0.3);
  top: 44px;
  left: -19px;
  transform: rotateX(70deg);
  pointer-events: none;
}

/* Planet colors */
.p1 {
  background: radial-gradient(circle at 35% 35%, #a78bfa, #5b21b6 60%, #2e1065);
  box-shadow: 0 0 28px #7c3aed40;
}
.planet-wrap:hover .p1 { box-shadow: 0 0 55px #7c3aed70; }

.p2 {
  background: radial-gradient(circle at 35% 35%, #67e8f9, #0e7490 60%, #083344);
  box-shadow: 0 0 28px #06b6d440;
}
.planet-wrap:hover .p2 { box-shadow: 0 0 55px #06b6d470; }

.p3 {
  background: radial-gradient(circle at 35% 35%, #fcd34d, #b45309 60%, #451a03);
  box-shadow: 0 0 28px #f59e0b40;
}
.planet-wrap:hover .p3 { box-shadow: 0 0 55px #f59e0b70; }

.label {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  opacity: 0.45;
}

.sub-label {
  font-size: 9px;
  opacity: 0.22;
  margin-top: -10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

/* Detail panel */
.detail-panel {
  margin-top: 64px;
  width: 100%;
  max-width: 580px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 28px 32px;
  display: none;
  animation: fadeUp 0.3s ease;
}

.detail-panel.show { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.detail-title {
  font-size: 17px;
  font-weight: 500;
  opacity: 0.9;
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}

.detail-body {
  font-size: 13px;
  opacity: 0.45;
  line-height: 1.85;
}

.detail-cta {
  display: inline-block;
  margin-top: 20px;
  padding: 9px 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 24px;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: 0.55;
  cursor: pointer;
  transition: all 0.2s;
  color: #fff;
}

.detail-cta:hover {
  background: rgba(255, 255, 255, 0.1);
  opacity: 1;
}

.hint {
  margin-top: 52px;
  font-size: 10px;
  opacity: 0.15;
  letter-spacing: 2.5px;
  text-transform: uppercase;
}