/* Time Machine Portal + era switcher */

.portal-page {
  min-height: 100vh;
  background: #000;
  overflow: hidden;
}

.portal-page .portal-stage {
  position: relative;
  z-index: 40;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px 80px;
  pointer-events: none;
}

.portal-page .portal-title {
  font-family: 'VT323', monospace;
  font-size: clamp(32px, 8vw, 56px);
  letter-spacing: clamp(6px, 2vw, 14px);
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(200,200,220,0.45);
  filter: drop-shadow(0 0 24px rgba(255,255,255,0.12));
  margin-bottom: 8px;
  text-align: center;
}

.portal-page .portal-sub {
  font-family: 'VT323', monospace;
  font-size: clamp(16px, 3vw, 22px);
  letter-spacing: 4px;
  color: rgba(255,255,255,0.35);
  margin-bottom: 48px;
  text-align: center;
}

.portal-gates {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(24px, 6vw, 64px);
  justify-content: center;
  align-items: center;
  pointer-events: auto;
}

.portal-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: 'VT323', monospace;
  padding: 0;
  transition: transform 320ms ease, filter 320ms ease;
}

.portal-gate:hover,
.portal-gate:focus-visible {
  transform: scale(1.05);
  filter: brightness(1.25);
  outline: none;
}

.portal-ring {
  width: clamp(140px, 28vw, 200px);
  height: clamp(140px, 28vw, 200px);
  border-radius: 50%;
  border: 2px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: portal-drift 7s ease-in-out infinite;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 0 40px color-mix(in srgb, currentColor 30%, transparent),
    inset 0 0 32px rgba(255,255,255,0.04);
}

.portal-ring::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  border: 1px dashed rgba(255,255,255,0.12);
}

.portal-ring .glyph {
  font-size: clamp(36px, 8vw, 52px);
  line-height: 1;
}

.portal-gate.past-gate { color: #00ff41; }
.portal-gate.past-gate .portal-ring {
  box-shadow:
    0 0 0 1px rgba(0,255,65,0.1),
    0 0 48px rgba(0,255,65,0.25),
    inset 0 0 28px rgba(0,255,65,0.06);
}

.portal-gate.present-gate { color: rgba(200,200,255,0.75); }
.portal-gate.present-gate .portal-ring {
  animation-duration: 9s;
  animation-direction: reverse;
}

.portal-label {
  font-size: clamp(18px, 3.5vw, 26px);
  letter-spacing: 6px;
  text-align: center;
}

.portal-era {
  font-size: 14px;
  letter-spacing: 3px;
  opacity: 0.55;
}

.portal-rift {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 60vh;
  transform: translate(-50%, -50%);
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.15), transparent);
  z-index: 25;
  pointer-events: none;
  animation: rift-pulse 4s ease-in-out infinite;
}

@keyframes portal-drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes rift-pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.85; }
}

/* era switcher — all pages */
.era-switcher {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 500;
  display: flex;
  gap: 4px;
  align-items: center;
  pointer-events: auto;
  font-family: 'VT323', monospace;
}

.era-btn {
  background: transparent;
  border: 1px dashed rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.4);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  padding: 5px 10px;
  cursor: pointer;
  transition: color 180ms, border-color 180ms, box-shadow 180ms;
}

.era-btn:hover {
  color: rgba(255,255,255,0.9);
  border-color: rgba(255,255,255,0.45);
}

.era-btn.active {
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.era-btn.era-portal {
  padding: 5px 8px;
  font-size: 13px;
}

.era-past .era-btn[data-era="past"] {
  border-color: rgba(0,255,65,0.55);
  color: #00ff41;
  box-shadow: 0 0 16px rgba(0,255,65,0.15);
}

.era-present .era-btn[data-era="present"] {
  border-color: rgba(200,200,255,0.45);
  color: rgba(220,220,255,0.9);
}