/* ============================================================
   Halfcat Audio — logo-only landing page
   Palette shared with pixelabs: near-black base, hot pink,
   violet, acid green. One scene, no copy, no chrome.
   ============================================================ */
:root {
  --bg:      #0d0e14;
  --bg-deep: #07080c;
  --pink:    #FF1493;
  --violet:  #BE48E0;
  --acid:    #39FF14;
  --teal:    #22D5D0;

  /* Logo image used for glow / ghost / sheen masks. Relative to this file. */
  --logo-url: url("../assets/logo/marks/mark.webp");
  /* width / height of the logo image — written by tools/prep_logo.py */
  --logo-ar: 0.7786;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@font-face {
  font-family: "Jost";
  src: url("../assets/fonts/jost-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

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

html, body { height: 100%; }

html {
  background: var(--bg);
  color-scheme: dark;
}

body {
  background: var(--bg);
  color: #E8EAF2;
  overflow: hidden;
  overscroll-behavior: none;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ============================================================
   Layer stack
   0 CSS aurora  ·  1 canvas  ·  2 grain  ·  3 vignette  ·  4 stage
   ============================================================ */

/* --- CSS aurora (three drifting radial blobs, pixelabs keyframes) --- */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  will-change: transform;
}

.blob-a {
  width: 95vmax;
  height: 95vmax;
  top: -38%;
  left: -28%;
  background: radial-gradient(circle at center,
    rgba(255, 20, 147, 0.22) 0%,
    rgba(190, 72, 224, 0.14) 38%,
    transparent 68%);
  animation: aurora-drift-a 18s ease-in-out infinite;
}

.blob-b {
  width: 85vmax;
  height: 85vmax;
  bottom: -42%;
  right: -28%;
  background: radial-gradient(circle at center,
    rgba(57, 255, 20, 0.16) 0%,
    rgba(34, 213, 208, 0.10) 38%,
    transparent 68%);
  animation: aurora-drift-b 22s ease-in-out infinite;
}

.blob-c {
  width: 60vmax;
  height: 60vmax;
  top: 28%;
  right: 12%;
  background: radial-gradient(circle at center,
    rgba(123, 110, 246, 0.13) 0%,
    rgba(190, 72, 224, 0.08) 45%,
    transparent 70%);
  animation: aurora-drift-c 26s ease-in-out infinite;
}

@keyframes aurora-drift-a {
  0%   { transform: translate(0%, 0%) scale(1); }
  33%  { transform: translate(6%, -8%) scale(1.06); }
  66%  { transform: translate(-4%, 5%) scale(0.97); }
  100% { transform: translate(0%, 0%) scale(1); }
}

@keyframes aurora-drift-b {
  0%   { transform: translate(0%, 0%) scale(1); }
  40%  { transform: translate(-7%, 6%) scale(1.04); }
  70%  { transform: translate(5%, -4%) scale(1.08); }
  100% { transform: translate(0%, 0%) scale(1); }
}

@keyframes aurora-drift-c {
  0%   { transform: translate(0%, 0%) scale(1.02); }
  50%  { transform: translate(4%, 7%) scale(0.96); }
  100% { transform: translate(0%, 0%) scale(1.02); }
}

/* --- canvas (WebGL aurora or 2D analyzer, driven by js/bg.js) --- */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* --- film grain --- */
.grain {
  position: fixed;
  inset: -100%;
  width: 300%;
  height: 300%;
  z-index: 2;
  pointer-events: none;
  opacity: 0.075;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n' x='0' y='0' width='100%25' height='100%25'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 220px 220px;
  animation: grain-shift 1.1s steps(5) infinite;
}

@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-3%, 2%); }
  40%  { transform: translate(2%, -4%); }
  60%  { transform: translate(-4%, -1%); }
  80%  { transform: translate(3%, 3%); }
  100% { transform: translate(0, 0); }
}

/* --- vignette --- */
.vignette {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(ellipse 78% 68% at 50% 50%,
    transparent 38%,
    rgba(4, 5, 8, 0.65) 100%);
}

/* ============================================================
   Stage + logo
   ============================================================ */
.stage {
  position: fixed;
  inset: 0;
  z-index: 4;
  display: grid;
  place-items: center;
  padding:
    max(24px, env(safe-area-inset-top))
    24px
    max(24px, env(safe-area-inset-bottom));
}

.logo-wrap {
  position: relative;
  width: min(56vw, 640px, calc(60dvh * var(--logo-ar)));
  container-type: inline-size;
  opacity: 0;
}


.mark {
  position: relative;
  width: 100%;
  aspect-ratio: var(--logo-ar);
}

html.is-ready .logo-wrap {
  animation: logo-in 1.8s var(--ease-out) forwards;
}

@keyframes logo-in {
  0%   { opacity: 0; transform: translateY(22px) scale(0.94); filter: blur(16px); }
  60%  { opacity: 1; }
  100% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

.logo-float {
  width: 100%;
  animation: logo-float 7s ease-in-out infinite;
}

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

.logo-tilt {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform-style: preserve-3d;
  will-change: transform;
}

/* --- live voxel cubes (js/cubes.js): the mark box grown to the upper right --- */
.cubes {
  position: absolute;
  left: -12%;
  top: -30%;
  width: 152%;          /* canvas is a replaced element: size it explicitly */
  height: 138%;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 600ms ease;
}
.cubes.is-live { opacity: 1; }

/* --- vector lettering: HALFCAT wordmark + tracked subline --- */
.lettering {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3cqw;
  margin-top: 2.2cqw;
  transition: transform 60ms steps(1);
}

.monogram {
  display: block;
  width: 92cqw;
  height: auto;
  overflow: visible;
  filter:
    drop-shadow(-4px 0 12px rgba(255, 20, 147, 0.35))
    drop-shadow(4px 0 12px rgba(57, 255, 20, 0.30))
    drop-shadow(0 0 30px rgba(190, 72, 224, 0.22));
}

.wordmark {
  font-family: "Jost", system-ui, sans-serif;
  font-weight: 500;
  font-size: 4.2cqw;
  line-height: 1;
  letter-spacing: 0.62em;
  text-indent: 0.62em;          /* balances the trailing letter-space */
  white-space: nowrap;
  color: #EDE6F2;
  text-shadow:
    0 0 10px rgba(255, 20, 147, 0.35),
    0 0 24px rgba(57, 255, 20, 0.20);
}

.logo,
.logo img,
.logo-glow,
.logo-ghost,
.logo-sheen {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.mark.ear-fade { --logo-url: url("../assets/logo/marks/mark-base.webp"); }

.mark.ear-fade .logo img {
  -webkit-mask: radial-gradient(ellipse 30% 28% at 83% 27%, rgba(0,0,0,0) 0%, rgba(0,0,0,.03) 60%, rgba(0,0,0,.35) 88%, #000 100%);
  mask: radial-gradient(ellipse 30% 28% at 83% 27%, rgba(0,0,0,0) 0%, rgba(0,0,0,.03) 60%, rgba(0,0,0,.35) 88%, #000 100%);
}

/* the bloom and sheen would otherwise redraw the ear that the mask above removes */
.mark.ear-fade .logo-sheen {
  -webkit-mask: radial-gradient(ellipse 32% 30% at 83% 27%, transparent 0, transparent 90%, #000 100%), var(--logo-url) center / contain no-repeat;
  -webkit-mask-composite: source-in;
  mask: radial-gradient(ellipse 32% 30% at 83% 27%, transparent 0, transparent 90%, #000 100%), var(--logo-url) center / contain no-repeat;
  mask-composite: intersect;
}

.mark.ear-fade .logo-glow {
  -webkit-mask: radial-gradient(ellipse 32% 30% at 83% 27%, transparent 0, transparent 90%, #000 100%);
  mask: radial-gradient(ellipse 32% 30% at 83% 27%, transparent 0, transparent 90%, #000 100%);
}

.logo img {
  display: block;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}


/* Soft bloom behind the artwork — a blurred copy, screen-blended so black drops out */
.logo-glow {
  background: var(--logo-url) center / contain no-repeat;
  filter: blur(26px) saturate(1.5);
  opacity: 0.55;
  transform: scale(1.06);
  mix-blend-mode: screen;
  animation: glow-breathe 5.5s ease-in-out infinite alternate;
}

@keyframes glow-breathe {
  from { opacity: 0.42; transform: scale(1.04); }
  to   { opacity: 0.68; transform: scale(1.08); }
}

/* Flat pink / green silhouettes of the logo, shown only during glitch bursts */
.logo-ghost {
  -webkit-mask: var(--logo-url) center / contain no-repeat;
  mask: var(--logo-url) center / contain no-repeat;
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
}

.ghost-pink  { background: var(--pink); }
.ghost-green { background: var(--acid); }

/* Light sweep across the artwork, masked to its shape */
.logo-sheen {
  -webkit-mask: var(--logo-url) center / contain no-repeat;
  mask: var(--logo-url) center / contain no-repeat;
  mix-blend-mode: screen;
  pointer-events: none;
  background: linear-gradient(105deg,
    transparent 38%,
    rgba(255, 255, 255, 0.20) 47%,
    rgba(57, 255, 20, 0.22) 50%,
    rgba(255, 20, 147, 0.22) 53%,
    transparent 62%);
  background-size: 240% 100%;
  background-repeat: no-repeat;
  background-position: 150% 0;
  animation: sheen 9s ease-in-out 3s infinite;
}

@keyframes sheen {
  0%   { background-position: 150% 0; }
  22%  { background-position: -50% 0; }
  100% { background-position: -50% 0; }
}


/* Glitch bursts (two frames, toggled by js/logo.js) */
.is-glitching .ghost-pink {
  opacity: 0.85;
  transform: translate(-8px, 2px);
  clip-path: inset(10% 0 52% 0);
}
.is-glitching .ghost-green {
  opacity: 0.85;
  transform: translate(8px, -2px);
  clip-path: inset(46% 0 8% 0);
}
.is-glitching .logo { transform: translateX(3px) skewX(-0.6deg); }
.is-glitching .lettering {
  transform: translateX(-4px);
  filter: drop-shadow(5px 0 0 rgba(57, 255, 20, 0.55)) drop-shadow(-5px 0 0 rgba(255, 20, 147, 0.55));
}

.is-glitching-2 .ghost-pink {
  opacity: 0.8;
  transform: translate(6px, -3px);
  clip-path: inset(30% 0 40% 0);
}
.is-glitching-2 .ghost-green {
  opacity: 0.8;
  transform: translate(-6px, 3px);
  clip-path: inset(62% 0 4% 0);
}
.is-glitching-2 .logo { transform: translateX(-2px); }
.is-glitching-2 .lettering {
  transform: translateX(3px);
  filter: drop-shadow(-4px 0 0 rgba(57, 255, 20, 0.5)) drop-shadow(4px 0 0 rgba(255, 20, 147, 0.5));
}

/* ============================================================
   Background modes (html[data-bg] set by js/bg.js)
   ============================================================ */
/* gl  = aurora / dither / crt (the shader paints the whole backdrop)
   2d  = analyzer / rain / scope (canvas over dimmed CSS aurora)
   css = minimal */
html[data-bg-kind="gl"] .bg-aurora { display: none; }
html[data-bg-kind="gl"].no-webgl .bg-aurora { display: block; }
html[data-bg-kind="gl"].no-webgl .bg-canvas { display: none; }

html[data-bg-kind="2d"] .bg-aurora { opacity: 0.6; }

html[data-bg-kind="css"] .bg-canvas { display: none; }

/* ============================================================
   Picker (only rendered with ?pick)
   ============================================================ */
.picker {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 10;
  display: flex;
  gap: 6px;
}

.picker[hidden] { display: none; }
.picker { flex-direction: column; align-items: flex-end; }
.picker-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }

.picker button {
  font: 11px/1 ui-monospace, "JetBrains Mono", Menlo, monospace;
  letter-spacing: 0.08em;
  color: rgba(232, 234, 242, 0.55);
  background: rgba(13, 14, 20, 0.6);
  border: 1px solid rgba(190, 72, 224, 0.25);
  border-radius: 999px;
  padding: 7px 11px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color 150ms ease, border-color 150ms ease;
}

.picker button:hover { color: var(--pink); border-color: rgba(255, 20, 147, 0.5); }
.picker button[aria-pressed="true"] { color: var(--acid); border-color: rgba(57, 255, 20, 0.55); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
  .logo-wrap { width: min(84vw, calc(54dvh * var(--logo-ar))); }
  .logo-glow { filter: blur(18px) saturate(1.4); }
  .vignette {
    background: radial-gradient(ellipse 90% 75% at 50% 50%,
      transparent 40%, rgba(4, 5, 8, 0.6) 100%);
  }
}

/* ============================================================
   Reduced motion — a single composed, static frame
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .blob,
  .grain,
  .logo-float,
  .logo-glow,
  .logo-sheen,
  .logo-wrap { animation: none !important; }
  .logo-wrap { opacity: 1; }
  .logo-sheen { display: none; }
}