/* ══════════════════════════════════════
   Design Tokens
   ══════════════════════════════════════ */
:root {
  --color-bg: #000;
  --color-text: #fff;
  --color-text-dim: rgba(255, 255, 255, 0.45);
  --color-text-faint: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-hover: rgba(255, 255, 255, 0.28);
  --color-glow: rgba(255, 255, 255, 0.04);
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-surface-hover: rgba(255, 255, 255, 0.065);

  --font-primary: 'Space Grotesk', sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;

  --spacing-frame: 24px;
  --spacing-content-gap: 2.4rem;

  --halftone-dot-sm: 16px;
  --halftone-dot-md: 32px;
  --halftone-dot-lg: 52px;

  --transition-slow: 20s;
  --transition-mid: 14s;
  /* ui-ux-pro-max: micro 150-300ms, complex ≤400ms */
  --transition-ui: 250ms;
  --transition-ui-fast: 150ms;
  /* view transitions: enter ease-out, exit faster (60-70% of enter) */
  --transition-enter: 420ms cubic-bezier(0, 0, 0.2, 1);
  --transition-exit: 280ms cubic-bezier(0.4, 0, 1, 1);

  /* z-index scale (ui-ux-pro-max: define layered scale) */
  --z-bg: 0;
  --z-glow: 1;
  --z-scanlines: 2;
  --z-grain: 3;
  --z-vignette: 4;
  --z-dither: 4;
  --z-frame: 50;   /* must stay ABOVE scrolling content */
  --z-content: 10;

  --radius-card: 4px;
  --radius-tag: 2px;
}

/* ══════════════════════════════════════
   Reset
   ══════════════════════════════════════ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ══════════════════════════════════════
   SVG Noise Filter
   ══════════════════════════════════════ */
.svg-filters {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ══════════════════════════════════════
   Base
   ══════════════════════════════════════ */
html {
  overflow: hidden;
  scroll-behavior: smooth;
}

html.portfolio-active {
  overflow-y: auto;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-primary);
  min-height: 100vh;
  width: 100vw;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ══════════════════════════════════════
   Background Layers
   ══════════════════════════════════════ */
.halftone {
  position: fixed;
  inset: -40%;
  pointer-events: none;
}

.halftone--sm {
  background: radial-gradient(circle, var(--color-text) 0.6px, transparent 0.6px);
  background-size: var(--halftone-dot-sm) var(--halftone-dot-sm);
  opacity: 0.04;
  animation: drift-sm var(--transition-slow) ease-in-out infinite alternate;
}

.halftone--md {
  background: radial-gradient(circle, var(--color-text) 1px, transparent 1px);
  background-size: var(--halftone-dot-md) var(--halftone-dot-md);
  opacity: 0.06;
  animation: drift-md var(--transition-mid) ease-in-out infinite alternate;
}

.halftone--lg {
  background: radial-gradient(circle, var(--color-text) 1.5px, transparent 1.5px);
  background-size: var(--halftone-dot-lg) var(--halftone-dot-lg);
  opacity: 0.035;
  animation: drift-lg 26s ease-in-out infinite alternate;
}

@keyframes drift-sm {
  0%   { transform: rotate(0deg) scale(1.2); }
  100% { transform: rotate(25deg) scale(1.6); }
}

@keyframes drift-md {
  0%   { transform: rotate(-5deg) scale(1.3); }
  100% { transform: rotate(20deg) scale(1.7); }
}

@keyframes drift-lg {
  0%   { transform: rotate(10deg) scale(1.1); }
  100% { transform: rotate(-15deg) scale(1.5); }
}

/* ── Scanlines ── */
.scanlines {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.015) 3px,
    rgba(255, 255, 255, 0.015) 4px
  );
  pointer-events: none;
  z-index: var(--z-scanlines);
}

/* ── Grain Overlay ── */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-grain);
  opacity: 0.25;
  filter: url(#noiseFilter);
  background: transparent;
}

/* ── Dither Pattern ── */
.dither {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-dither);
  background-image: repeating-conic-gradient(
    from 0deg at 50% 50%,
    rgba(255, 255, 255, 0.025) 0deg 90deg,
    transparent 90deg 180deg,
    rgba(0, 0, 0, 0.025) 180deg 270deg,
    transparent 270deg 360deg
  );
  background-size: 4px 4px;
  mix-blend-mode: overlay;
  animation: dither-crawl 6s linear infinite;
}

@keyframes dither-crawl {
  0%   { background-position: 0 0; }
  100% { background-position: 4px 4px; }
}

/* ── Frame Border ── */
.frame {
  position: fixed;
  top: var(--spacing-frame);
  left: var(--spacing-frame);
  right: var(--spacing-frame);
  bottom: var(--spacing-frame);
  border: 1px solid var(--color-border);
  pointer-events: none;
  /* ui-ux-pro-max: frame must sit above all scrolling content */
  z-index: 5;
}

.frame::before,
.frame::after {
  content: '';
  position: absolute;
  background: var(--color-text);
  opacity: 0.15;
}

.frame::before {
  top: -1px;
  left: -1px;
  width: 20px;
  height: 1px;
}

.frame::after {
  top: -1px;
  left: -1px;
  width: 1px;
  height: 20px;
}

.frame-corner {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
}

.frame-corner::before,
.frame-corner::after {
  content: '';
  position: absolute;
  background: var(--color-text);
  opacity: 0.15;
}

.frame-corner--tr { top: -1px; right: -1px; }
.frame-corner--tr::before { top: 0; right: 0; width: 20px; height: 1px; }
.frame-corner--tr::after  { top: 0; right: 0; width: 1px; height: 20px; }

.frame-corner--bl { bottom: -1px; left: -1px; }
.frame-corner--bl::before { bottom: 0; left: 0; width: 20px; height: 1px; }
.frame-corner--bl::after  { bottom: 0; left: 0; width: 1px; height: 20px; }

.frame-corner--br { bottom: -1px; right: -1px; }
.frame-corner--br::before { bottom: 0; right: 0; width: 20px; height: 1px; }
.frame-corner--br::after  { bottom: 0; right: 0; width: 1px; height: 20px; }

/* ── Ambient Glow ── */
.glow {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.06) 0%,
    rgba(255, 255, 255, 0.02) 30%,
    transparent 70%
  );
  pointer-events: none;
  z-index: var(--z-glow);
  animation: glow-pulse 8s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
  0%   { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
}

/* ── Vignette ── */
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-vignette);
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(0, 0, 0, 0.5) 100%
  );
}

/* ══════════════════════════════════════
   WELCOME SCREEN
   ══════════════════════════════════════ */
.welcome {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-content);
  /* ui-ux-pro-max: cursor-pointer on clickable elements */
  cursor: pointer;
  /* ui-ux-pro-max: touch-action manipulation removes 300ms tap delay */
  touch-action: manipulation;
  /* exit animation: ease-in, shorter than enter (60-70% of enter) */
  transition:
    opacity var(--transition-exit),
    transform var(--transition-exit);
}

.welcome.is-exiting {
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.welcome.is-hidden {
  display: none;
}

/* ui-ux-pro-max: focus-states - visible focus ring for keyboard nav */
.welcome:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: -8px;
}

.content {
  position: relative;
  z-index: 10;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-content-gap);
  align-items: center;
}

/* ── Logo ── */
.logo {
  font-size: clamp(2.2rem, 7vw, 5rem);
  font-weight: var(--font-weight-light);
  letter-spacing: 0.2em;
  line-height: 1;
  opacity: 0.95;
  text-transform: lowercase;
}

.dot {
  display: inline-block;
  animation: blink 1.6s step-end infinite;
  opacity: 0.6;
}

@keyframes blink {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 0; }
}

/* ── Divider ── */
.divider {
  width: 48px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.35),
    transparent
  );
}

/* ── Message ── */
.message {
  font-size: clamp(0.65rem, 1.2vw, 0.8rem);
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.3em;
  color: var(--color-text-dim);
  text-transform: uppercase;
  animation: pulse-msg 2.5s ease-in-out infinite;
}

@keyframes pulse-msg {
  0%, 100% { opacity: 0.45; }
  50%      { opacity: 0.8; }
}

/* ══════════════════════════════════════
   PORTFOLIO
   ══════════════════════════════════════ */
.portfolio {
  position: relative;
  z-index: var(--z-content);
  /* Inset from fixed frame border on all sides */
  padding: calc(var(--spacing-frame) + 20px);
  padding-top: calc(var(--spacing-frame) + 28px);
  /* Extra bottom padding so last card isn't hidden behind frame */
  padding-bottom: calc(var(--spacing-frame) + 48px);
  min-height: 100vh;
  opacity: 0;
  transform: translateY(24px);
  pointer-events: none;
  /* ui-ux-pro-max: enter with ease-out, delay = exit duration */
  transition:
    opacity var(--transition-enter) 0.18s,
    transform var(--transition-enter) 0.18s;
}

.portfolio.is-active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ── Portfolio Header ── */
.portfolio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.portfolio-logo {
  font-size: 1.4rem;
  font-weight: var(--font-weight-light);
  letter-spacing: 0.15em;
  text-transform: lowercase;
  transition: opacity var(--transition-ui-fast) ease;
}

.portfolio-logo:hover {
  opacity: 0.7;
}

.portfolio-nav {
  display: flex;
  gap: 1.8rem;
}

.nav-link {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  transition: color var(--transition-ui-fast) ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text);
  transition: width var(--transition-ui-fast) ease-out;
}

.nav-link:hover {
  color: var(--color-text);
}

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

.nav-link:focus-visible,
.portfolio-logo:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ══════════════════════════════════════
   FEATURED CARD
   ══════════════════════════════════════ */
.featured {
  margin-bottom: 4rem;
}

.featured-badge {
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 1.2rem;
}

.featured-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  /* ui-ux-pro-max: transform/opacity only, ease-out for hover enter */
  transition:
    border-color var(--transition-ui-fast) ease-out,
    box-shadow var(--transition-ui-fast) ease-out;
}

.featured-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 0 60px rgba(255, 255, 255, 0.04);
}

/* ui-ux-pro-max: focus-states for keyboard navigation */
.featured-card:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.featured-visual {
  position: relative;
  width: 100%;
  height: 280px;
  overflow: hidden;
}

.featured-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(30%) brightness(0.8);
  transition: filter var(--transition-ui) ease-out, transform var(--transition-ui) ease-out;
}

.featured-card:hover .featured-img {
  filter: grayscale(0%) brightness(0.9);
  transform: scale(1.03);
}

.featured-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--color-bg) 0%, transparent 60%);
}

.featured-info {
  padding: 1.6rem 2rem 2rem;
}

.featured-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: var(--font-weight-light);
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.featured-desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--color-text-dim);
  max-width: 600px;
  margin-bottom: 1.2rem;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-tag);
  color: var(--color-text-dim);
}

.meta-separator {
  color: var(--color-text-dim);
  opacity: 0.4;
}

.meta-text {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* ══════════════════════════════════════
   GAMES SECTION
   ══════════════════════════════════════ */
.games-section {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 0.65rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 1.8rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-text-faint);
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
}

/* ══════════════════════════════════════
   GAME CARD
   ══════════════════════════════════════ */
.game-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-surface);
  /* stagger animation base (hidden state) */
  opacity: 0;
  transform: translateY(16px);
  /* ui-ux-pro-max: transform/opacity only; ease-out entering */
  transition:
    opacity 0.35s ease-out,
    transform 0.35s ease-out;
}

.game-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-hover);
  transform: translateY(-2px) !important;
}

.game-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Add hover transitions after card is visible */
.game-card.is-visible {
  transition:
    opacity 0.35s ease-out,
    transform 0.35s ease-out,
    border-color var(--transition-ui-fast) ease-out,
    background var(--transition-ui-fast) ease-out;
}

/* ui-ux-pro-max: focus-states */
.game-card:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.game-thumb {
  width: 100%;
  height: 160px;
  overflow: hidden;
}

.game-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%) brightness(0.85);
  transition: filter var(--transition-ui-fast) ease-out, transform var(--transition-ui) ease-out;
}

.game-card:hover .game-thumb img {
  filter: grayscale(0%) brightness(1);
  transform: scale(1.05);
}

.game-info {
  padding: 1rem 1.2rem 1.2rem;
}

.game-title {
  font-size: 0.95rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.game-desc {
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--color-text-dim);
  margin-bottom: 0.7rem;
}

.game-genre {
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  opacity: 0.7;
}

/* ── Collab cards (no image) ── */
.game-card--collab .game-info {
  padding: 1.4rem 1.2rem;
}

/* ══════════════════════════════════════
   FOOTER
   ══════════════════════════════════════ */
.portfolio-footer {
  padding: 2rem 0 1rem;
  text-align: center;
}

.footer-line {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  margin: 0 auto 1.2rem;
}

.footer-text {
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.12);
  text-transform: uppercase;
}

/* ══════════════════════════════════════
   REDUCED MOTION (ui-ux-pro-max: respect prefers-reduced-motion)
   ══════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .halftone--sm,
  .halftone--md,
  .halftone--lg,
  .dither,
  .glow,
  .dot,
  .message {
    animation: none;
  }

  .welcome,
  .portfolio,
  .game-card,
  .featured-img,
  .game-thumb img {
    transition-duration: 0ms !important;
  }
}

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */
@media (max-width: 600px) {
  :root {
    --spacing-frame: 16px;
    --spacing-content-gap: 1.8rem;
  }

  .glow {
    width: 300px;
    height: 300px;
  }

  .featured-visual {
    height: 180px;
  }

  .featured-info {
    padding: 1.2rem 1.4rem 1.6rem;
  }

  .games-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .portfolio-nav {
    gap: 1.2rem;
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .games-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-visual {
    height: 220px;
  }
}