/* ════════════════════════════════════════
   404-styles.css
   404-specific layout, animations, and effects
   Mars Dust tokens imported from custom.css
════════════════════════════════════════ */

/* Grain overlay */

body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* Star field */

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(1.5px 1.5px at 8% 12%, rgba(255,255,255,0.6) 0%, transparent 100%), radial-gradient(1px 1px at 19% 55%, rgba(255,255,255,0.4) 0%, transparent 100%), radial-gradient(2px 2px at 31% 8%, rgba(255,255,255,0.55) 0%, transparent 100%), radial-gradient(1px 1px at 42% 72%, rgba(255,255,255,0.35) 0%, transparent 100%), radial-gradient(1.5px 1.5px at 57% 28%, rgba(255,255,255,0.5) 0%, transparent 100%), radial-gradient(1px 1px at 64% 85%, rgba(255,255,255,0.3) 0%, transparent 100%), radial-gradient(2px 2px at 73% 18%, rgba(255,255,255,0.6) 0%, transparent 100%), radial-gradient(1px 1px at 81% 62%, rgba(255,255,255,0.4) 0%, transparent 100%), radial-gradient(1.5px 1.5px at 90% 38%, rgba(255,255,255,0.5) 0%, transparent 100%), radial-gradient(1px 1px at 96% 80%, rgba(255,255,255,0.35) 0%, transparent 100%), radial-gradient(1px 1px at 12% 88%, rgba(255,255,255,0.3) 0%, transparent 100%), radial-gradient(1.5px 1.5px at 47% 45%, rgba(255,255,255,0.45) 0%, transparent 100%), radial-gradient(1px 1px at 25% 35%, rgba(255,255,255,0.25) 0%, transparent 100%), radial-gradient(1px 1px at 68% 5%, rgba(255,255,255,0.4) 0%, transparent 100%), radial-gradient(2px 2px at 85% 92%, rgba(255,255,255,0.5) 0%, transparent 100%), radial-gradient(1px 1px at 3% 40%, rgba(255,255,255,0.3) 0%, transparent 100%), radial-gradient(1.5px 1.5px at 52% 60%, rgba(255,255,255,0.4) 0%, transparent 100%), radial-gradient(1px 1px at 77% 33%, rgba(255,255,255,0.35) 0%, transparent 100%);
}

/* Warm ambient glow — like Mars is nearby */

.glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 60% 40% at 50% 60%, rgba(180, 80, 20, 0.06) 0%, transparent 70%), radial-gradient(ellipse 40% 50% at 20% 30%, rgba(200, 120, 72, 0.04) 0%, transparent 60%);
}

/* Layout */

.page {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

/* Nav brand */

.nav-brand {
  position: fixed;
  top: 1.5rem;
  left: 2rem;
  font-family: var(--condensed);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  z-index: 10;
}

.nav-brand span {
  color: var(--text-dim);
  font-weight: 300;
}

/* 404 number */

.error-num {
  font-family: var(--display);
  font-size: clamp(7rem, 20vw, 16rem);
  font-weight: 300;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200, 120, 72, 0.25);
  letter-spacing: -0.02em;
  margin-bottom: 0;
  animation: pulse 6s ease-in-out infinite;
  user-select: none;
}

@keyframes pulse {
  0%, 100% {
    -webkit-text-stroke-color: rgba(200, 120, 72, 0.2);
  }
  50% {
    -webkit-text-stroke-color: rgba(200, 120, 72, 0.45);
  }
}

/* Signal lost icon */

.signal-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  opacity: 0.7;
  animation: blink 3s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% {
    opacity: 0.7;
  }
  50% {
    opacity: 0.2;
  }
}

.error-title {
  font-family: var(--condensed);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.error-body {
  font-family: var(--body);
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-muted);
  max-width: 420px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

/* Coordinates readout — flavor text */

.coords {
  font-family: var(--condensed);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
}

.coords::before, .coords::after {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--text-dim);
}

/* Buttons */

.btn-home {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--condensed);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--void);
  background: var(--accent);
  padding: 0.75rem 2rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-home:hover {
  background: #e8a868;
  color: var(--void);
}

.btn-gallery {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--condensed);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--rule);
  padding: 0.75rem 2rem;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.btn-gallery:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Scrollbar */

::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--void);
}

::-webkit-scrollbar-thumb {
  background: var(--text-dim);
  border-radius: 999px;
}

/* Fade in */

.page > * {
  animation: fadeUp 0.8s ease both;
}

.page > *:nth-child(2) {
  animation-delay: 0.1s;
}

.page > *:nth-child(3) {
  animation-delay: 0.2s;
}

.page > *:nth-child(4) {
  animation-delay: 0.3s;
}

.page > *:nth-child(5) {
  animation-delay: 0.4s;
}

.page > *:nth-child(6) {
  animation-delay: 0.5s;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}