/* ==========================================================================
   5 SITES PROJECT — hub launcher v2
   Dark, elegant index page. CSS + GSAP polish, plus one small live WebGL2
   thumbnail per row (enabled via html.thumbs-on only when WebGL2 exists —
   without it the layout is identical to v1).
   ========================================================================== */

:root {
  --bg: #0b0b0d;
  --bg-raised: #101014;
  --text: #ebe9e4;
  --muted: #8a8894;
  --line: rgba(235, 233, 228, 0.12);
  --font: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Subtle procedural grain over everything (inline SVG turbulence, no assets) */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
  background: var(--text);
  color: var(--bg);
}

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

:focus-visible {
  outline: 2px solid var(--accent, var(--text));
  outline-offset: 4px;
}

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
  color: var(--text);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

/* --------------------------------------------------------------------------
   Layout frame
   -------------------------------------------------------------------------- */

.frame {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.brand-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand {
  font-weight: 600;
}

.tagline {
  color: var(--muted);
  font-weight: 400;
  text-align: right;
}

.title {
  font-size: clamp(2.5rem, 7.5vw, 5.25rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: clamp(2.5rem, 7vh, 4.5rem) 0 clamp(1.75rem, 4vh, 2.75rem);
  text-wrap: balance;
}

.title .line {
  display: block;
  overflow: hidden;
}

.title .line-inner {
  display: block;
  will-change: transform;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.25rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: clamp(1.5rem, 4vh, 2.5rem);
}

/* --------------------------------------------------------------------------
   Index rows
   -------------------------------------------------------------------------- */

.index {
  list-style: none;
  border-top: 1px solid var(--line);
}

.index li {
  border-bottom: 1px solid var(--line);
}

.row {
  position: relative;
  display: grid;
  grid-template-columns: clamp(3rem, 6vw, 5.5rem) minmax(0, 1.1fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding: clamp(1.6rem, 3.4vw, 2.4rem) clamp(0.75rem, 2vw, 1.5rem);
  isolation: isolate;
  transition:
    padding 0.55s var(--ease-out),
    color 0.35s ease;
}

/* Accent bleed layer */
.row::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--accent-soft), transparent 72%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.6s var(--ease-out);
}

/* Accent edge bar */
.row::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.45s var(--ease-out) 0.05s;
}

.row-num {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
  transition: color 0.35s ease;
}

.row-name {
  font-size: clamp(1.9rem, 4.6vw, 3.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
  transition:
    color 0.35s ease,
    letter-spacing 0.55s var(--ease-out),
    transform 0.55s var(--ease-out);
}

.row-body {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-width: 0;
}

.row-desc {
  font-size: 0.92rem;
  font-weight: 300;
  color: var(--muted);
  max-width: 34ch;
  transition: color 0.35s ease;
}

.row-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.row-tags i {
  font-style: normal;
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28em 0.85em;
  transition:
    color 0.35s ease,
    border-color 0.35s ease;
}

/* Live WebGL2 thumbnail — hidden until JS confirms WebGL2 (html.thumbs-on).
   Backing store is a fixed 200x120 at DPR 1; CSS scales it down responsively. */
.row-thumb {
  display: none;
}

html.thumbs-on .row-thumb {
  display: block;
  width: clamp(150px, 15vw, 200px);
  aspect-ratio: 5 / 3;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-raised);
  opacity: 0.72;
  filter: saturate(0.85);
  pointer-events: none;
  transition:
    opacity 0.45s ease,
    filter 0.45s ease,
    border-color 0.35s ease;
}

html.thumbs-on .row {
  grid-template-columns: clamp(3rem, 6vw, 5.5rem) minmax(0, 1.1fr) minmax(0, 1fr) auto auto;
}

.row-thumb canvas {
  display: block;
  width: 100%;
  height: 100%;
}

html.thumbs-on .row:hover .row-thumb,
html.thumbs-on .row:focus-visible .row-thumb {
  opacity: 1;
  filter: saturate(1);
  border-color: var(--accent);
}

.row-arrow {
  width: clamp(2.25rem, 4vw, 3rem);
  color: var(--accent);
  opacity: 0;
  transform: translateX(-18px);
  transition:
    opacity 0.4s ease,
    transform 0.55s var(--ease-out);
}

.row-arrow svg {
  display: block;
  width: 100%;
  height: auto;
}

/* Hover / focus state: expand, bleed, arrow in */
.row:hover,
.row:focus-visible {
  padding-top: clamp(2rem, 4vw, 3rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.row:hover::before,
.row:focus-visible::before {
  transform: scaleX(1);
}

.row:hover::after,
.row:focus-visible::after {
  transform: scaleY(1);
}

.row:hover .row-name,
.row:focus-visible .row-name {
  color: var(--accent);
  letter-spacing: 0.045em;
  transform: translateX(0.35rem);
}

.row:hover .row-num,
.row:focus-visible .row-num {
  color: var(--accent);
}

.row:hover .row-desc,
.row:focus-visible .row-desc {
  color: var(--text);
}

.row:hover .row-tags i,
.row:focus-visible .row-tags i {
  color: var(--text);
  border-color: var(--accent);
}

.row:hover .row-arrow,
.row:focus-visible .row-arrow {
  opacity: 1;
  transform: translateX(0);
}

.row:active .row-name {
  transform: translateX(0.35rem) scale(0.99);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-foot {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  padding-top: clamp(1.75rem, 5vh, 3rem);
  font-size: 0.8rem;
  color: var(--muted);
}

.foot-right {
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

/* --------------------------------------------------------------------------
   Intro overlay (driven by JS; never shown without it)
   -------------------------------------------------------------------------- */

.intro {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.4rem;
}

.intro-mark {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.intro-ticks {
  display: flex;
  gap: 0.55rem;
}

.intro-tick {
  width: 2.4rem;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Custom cursor (enabled via html.cursor-on for fine pointers only)
   -------------------------------------------------------------------------- */

.cursor {
  display: none;
}

html.cursor-on .cursor {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

html.cursor-on .cursor.is-visible {
  opacity: 1;
}

html.cursor-on,
html.cursor-on a,
html.cursor-on body {
  cursor: none;
}

.cursor-dot {
  position: absolute;
  top: -3px;
  left: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text);
}

.cursor-ring {
  position: absolute;
  top: -19px;
  left: -19px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--cursor-accent, rgba(235, 233, 228, 0.4));
  transition:
    transform 0.35s var(--ease-out),
    border-color 0.35s ease;
}

.cursor.is-hover .cursor-ring {
  transform: scale(1.7);
  border-color: var(--cursor-accent, var(--text));
}

.cursor.is-down .cursor-ring {
  transform: scale(0.8);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 860px) {
  .row,
  html.thumbs-on .row {
    grid-template-columns: 3rem minmax(0, 1fr) auto;
    grid-template-areas:
      "num name  arrow"
      "num body  arrow";
    align-items: start;
    row-gap: 0.85rem;
  }

  /* Third grid row exists only when the live thumbnails do */
  html.thumbs-on .row {
    grid-template-areas:
      "num name  arrow"
      "num body  arrow"
      "num thumb arrow";
  }

  .row-num  { grid-area: num; padding-top: 0.4rem; }
  .row-name { grid-area: name; white-space: normal; }
  .row-body { grid-area: body; }

  html.thumbs-on .row-thumb {
    grid-area: thumb;
    margin-top: 0.2rem;
  }

  .row-arrow {
    grid-area: arrow;
    align-self: center;
  }
}

@media (max-width: 520px) {
  .brand-row {
    flex-direction: column;
    gap: 0.25rem;
  }

  .tagline {
    text-align: left;
  }

  .row-arrow {
    display: none;
  }

  .site-foot {
    flex-direction: column;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion: keep the page fully usable, drop decorative movement
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .row-arrow {
    opacity: 1;
    transform: none;
  }

  .intro {
    display: none !important;
  }
}