/* ==========================================================================
   Galaxy Arcade — Main Site Styles
   Neon arcade theme for a 4x4 grid homepage of arcade game cards.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Core palette */
  --color-bg-dark: #0a0a0a;
  --color-bg-deep: #1a0a2e;
  --color-bg-card: #111118;
  --color-bg-card-hover: #1a1a28;
  --color-surface: #16161e;

  /* Neon palette */
  --neon-cyan: #0ff;
  --neon-magenta: #f0f;
  --neon-hotpink: #ff2d95;
  --neon-blue: #4d4dff;
  --neon-green: #39ff14;
  --neon-yellow: #ffff00;
  --neon-orange: #ff6600;

  /* Dimmed variants (for borders, subtle UI) */
  --neon-cyan-dim: rgba(0, 255, 255, 0.25);
  --neon-magenta-dim: rgba(255, 0, 255, 0.2);
  --neon-hotpink-dim: rgba(255, 45, 149, 0.2);
  --neon-blue-dim: rgba(77, 77, 255, 0.2);
  --neon-green-dim: rgba(57, 255, 20, 0.2);

  /* Typography */
  --font-display: "SF Mono", "Fira Code", "Cascadia Code", "JetBrains Mono",
    "Menlo", "Consolas", "Monaco", monospace;
  --font-body: "SF Mono", "Fira Code", "Menlo", "Consolas", monospace;
  --font-score: "Courier New", "Courier", monospace;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* Card dimensions */
  --card-radius: 10px;
  --card-border-width: 1px;
  --card-glow-spread: 8px;
  --card-perspective: 800px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 500ms ease;

  /* Layout */
  --nav-height: 60px;
  --grid-gap: 1.25rem;
  --max-width: 1200px;
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: linear-gradient(160deg, var(--color-bg-dark) 0%, var(--color-bg-deep) 100%);
  background-attachment: fixed;
  color: #d0d0d8;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

a {
  color: var(--neon-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--neon-hotpink);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

ul,
ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Navigation Bar
   -------------------------------------------------------------------------- */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 var(--space-lg);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--neon-cyan-dim);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-shadow:
    0 0 6px var(--neon-cyan),
    0 0 20px rgba(0, 255, 255, 0.4);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-links a {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #b0b0c0;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--neon-hotpink);
  box-shadow: 0 0 6px var(--neon-hotpink);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--neon-hotpink);
  text-shadow: 0 0 8px rgba(255, 45, 149, 0.5);
}

.nav-links a:hover::after {
  width: 100%;
}

/* --------------------------------------------------------------------------
   4. Neon Sign Header
   -------------------------------------------------------------------------- */
.neon-sign {
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: var(--space-lg) var(--space-md);
  color: #fff;
  text-shadow:
    0 0 4px #fff,
    0 0 11px var(--neon-cyan),
    0 0 22px var(--neon-cyan),
    0 0 40px var(--neon-cyan),
    0 0 60px var(--neon-blue),
    0 0 76px var(--neon-blue);
  animation: glow-pulse 3s ease-in-out infinite alternate;
}

.neon-sign span {
  display: inline-block;
  animation: flicker 4s infinite;
}

/* Per-letter stagger — apply via style="--letter-index: N" on each <span> */
.neon-sign span:nth-child(odd) {
  animation-delay: calc(var(--letter-index, 0) * 0.15s);
}

.neon-sign span:nth-child(even) {
  animation-delay: calc(var(--letter-index, 0) * 0.15s + 1.8s);
}

/* --------------------------------------------------------------------------
   5. Arcade Grid
   -------------------------------------------------------------------------- */
.arcade-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg);
}

/* --------------------------------------------------------------------------
   6. Game Card
   -------------------------------------------------------------------------- */
.game-card {
  position: relative;
  background: var(--color-bg-card);
  border: var(--card-border-width) solid var(--neon-cyan-dim);
  border-radius: var(--card-radius);
  overflow: hidden;
  cursor: pointer;
  perspective: var(--card-perspective);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
  animation: slide-in 0.6s ease backwards;
  animation-delay: calc(var(--card-index, 0) * 0.07s);
}

.game-card-inner {
  transition: transform var(--transition-base);
  transform-style: preserve-3d;
}

/* Cover / thumbnail area */
.game-card .card-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
  overflow: hidden;
}

.game-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.game-card .card-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 50%,
    rgba(10, 10, 10, 0.85) 100%
  );
}

/* Card body */
.game-card .card-body {
  padding: var(--space-md);
}

.game-card .card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xs);
  text-shadow: 0 0 6px var(--neon-cyan-dim);
}

.game-card .card-highscore {
  font-family: var(--font-score);
  font-size: 0.75rem;
  color: var(--neon-green);
  letter-spacing: 0.1em;
  text-shadow: 0 0 4px var(--neon-green-dim);
}

/* Hover state */
.game-card:hover {
  border-color: var(--neon-cyan);
  box-shadow:
    0 0 var(--card-glow-spread) var(--neon-cyan-dim),
    0 0 24px rgba(0, 255, 255, 0.12),
    inset 0 0 12px rgba(0, 255, 255, 0.05);
  transform: scale(1.03);
  z-index: 2;
}

.game-card:hover .card-cover img {
  transform: scale(1.08);
}

.game-card:hover .card-title {
  text-shadow: 0 0 10px var(--neon-cyan);
}

/* 3D perspective tilt — controlled via JS setting --rx / --ry custom props */
.game-card[style*="--rx"] .game-card-inner {
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

/* --------------------------------------------------------------------------
   7. Coin Slot (Footer Decoration)
   -------------------------------------------------------------------------- */
.coin-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  text-align: center;
}

.coin-slot-insert {
  width: 60px;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to bottom, #333, #1a1a1a);
  border: 1px solid #444;
  box-shadow:
    inset 0 1px 3px rgba(0, 0, 0, 0.6),
    0 0 8px var(--neon-yellow-dim, rgba(255, 255, 0, 0.1));
  position: relative;
}

.coin-slot-insert::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 2px;
  background: #222;
  border-radius: 1px;
}

.coin-slot-text {
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--neon-yellow);
  text-shadow: 0 0 8px rgba(255, 255, 0, 0.4);
  animation: flicker 5s infinite;
}

/* --------------------------------------------------------------------------
   8. Keyframe Animations
   -------------------------------------------------------------------------- */
@keyframes flicker {
  0%,
  19.999%,
  22%,
  62.999%,
  64%,
  64.999%,
  70%,
  100% {
    opacity: 1;
  }
  20%,
  21.999%,
  63%,
  63.999%,
  65%,
  69.999% {
    opacity: 0.4;
  }
}

@keyframes glow-pulse {
  0% {
    text-shadow:
      0 0 4px #fff,
      0 0 11px var(--neon-cyan),
      0 0 22px var(--neon-cyan),
      0 0 40px var(--neon-cyan),
      0 0 60px var(--neon-blue),
      0 0 76px var(--neon-blue);
  }
  100% {
    text-shadow:
      0 0 4px #fff,
      0 0 14px var(--neon-cyan),
      0 0 30px var(--neon-cyan),
      0 0 55px var(--neon-cyan),
      0 0 80px var(--neon-blue),
      0 0 100px var(--neon-blue);
  }
}

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

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --------------------------------------------------------------------------
   9. Utility Classes
   -------------------------------------------------------------------------- */
.text-cyan   { color: var(--neon-cyan); }
.text-magenta { color: var(--neon-magenta); }
.text-hotpink { color: var(--neon-hotpink); }
.text-green  { color: var(--neon-green); }
.text-yellow { color: var(--neon-yellow); }
.text-orange { color: var(--neon-orange); }
.text-blue   { color: var(--neon-blue); }

.glow-cyan    { text-shadow: 0 0 8px var(--neon-cyan), 0 0 20px var(--neon-cyan-dim); }
.glow-magenta { text-shadow: 0 0 8px var(--neon-magenta), 0 0 20px var(--neon-magenta-dim); }
.glow-hotpink { text-shadow: 0 0 8px var(--neon-hotpink), 0 0 20px var(--neon-hotpink-dim); }

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

/* --------------------------------------------------------------------------
   10. Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* Small phones (<=480px) — single/two column */
@media (max-width: 480px) {
  .arcade-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    padding: var(--space-md);
  }

  .neon-sign {
    font-size: clamp(1.5rem, 8vw, 2.2rem);
    padding: var(--space-lg) var(--space-sm);
  }

  .nav-bar {
    padding: 0 var(--space-md);
  }

  .nav-links {
    gap: var(--space-md);
  }

  .nav-links a {
    font-size: 0.75rem;
  }

  .game-card .card-body {
    padding: var(--space-sm);
  }

  .game-card .card-title {
    font-size: 0.85rem;
  }

  .game-card .card-highscore {
    font-size: 0.65rem;
  }
}

/* Tablets (481px — 768px) — three columns */
@media (min-width: 481px) and (max-width: 768px) {
  .arcade-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }

  .neon-sign {
    font-size: clamp(1.8rem, 5vw, 3rem);
  }
}

/* Small desktops (769px — 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .arcade-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Large desktops (>1024px) */
@media (min-width: 1025px) {
  .arcade-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}