/* ==========================================================================
   BretCat — $BRETCAT
   Dark instrument-panel aesthetic. One blue, one coral, disciplined neutrals.
   ========================================================================== */

/* --- tokens --------------------------------------------------------------- */
:root {
  /* surfaces: tinted darks, never pure black */
  --ink-900: #080d16;
  --ink-850: #0b111c;
  --ink-800: #0e1725;
  --ink-700: #14202f;
  --line:    #1d2c40;
  --line-hi: #2b415e;

  /* accents: primary blue from the mark, coral from the cat's tongue */
  --blue:      #2f9bf0;
  --blue-deep: #1a6fc4;
  --blue-soft: #8ec8f7;
  --coral:     #e8755d;

  /* type colours */
  --paper:    #eef3f9;
  --text:     #b9c8dc;
  --text-dim: #7f92aa;

  --font-display: 'Bricolage Grotesque', 'Trebuchet MS', sans-serif;
  --font-body: 'Instrument Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'Martian Mono', ui-monospace, monospace;

  --gutter: clamp(1.25rem, 5vw, 5.5rem);
  --maxw: 1280px;
  --radius: 14px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

/* --- reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text);
  font: 400 1rem/1.7 var(--font-body);
  letter-spacing: .002em;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 800; color: var(--paper); }
h1, h2, h3, p, dl, dd, dt, ol, ul { margin: 0; }
ol, ul { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
em { font-style: normal; }
strong { color: var(--paper); font-weight: 600; }
button { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: .5rem; left: .5rem; z-index: 200;
  padding: .6rem 1rem; border-radius: 8px;
  background: var(--blue); color: var(--ink-900);
  font: 600 .75rem var(--font-mono);
  transform: translateY(-160%);
  transition: transform .25s var(--ease);
}
.skip-link:focus { transform: none; }

/* film grain — fixed, non-interactive layer */
.grain {
  position: fixed; inset: 0; z-index: 90; pointer-events: none;
  opacity: .04; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- shared type helpers ------------------------------------------------- */
.eyebrow,
.section__num,
.panel__label,
.phase__tag,
.nav a,
.ticker-chip,
.spec-strip dt,
.rows dt {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}

/* --- top bar ------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 80;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .85rem var(--gutter);
  background: color-mix(in srgb, var(--ink-900) 82%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(140%);
}
.brand { display: flex; align-items: center; gap: .6rem; margin-right: auto; }
.brand__mark { width: 28px; height: 28px; flex: none; }
.brand__word {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.1rem; letter-spacing: -.01em; color: var(--paper);
}
.brand__word em { color: var(--blue); }

.nav { display: flex; gap: 1.75rem; }
.nav a {
  position: relative; font-size: .68rem; color: var(--text-dim);
  padding: .35rem 0; transition: color .2s;
}
.nav a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--blue); transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--paper); }
.nav a:hover::after { transform: scaleX(1); }
.nav__num { color: var(--blue); margin-right: .3rem; }

.ticker-chip {
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem .75rem; border: 1px solid var(--line-hi); border-radius: 999px;
  background: var(--ink-800); font-size: .66rem; color: var(--blue-soft);
}
.pulse-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--blue);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--blue) 60%, transparent);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--blue) 55%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* --- hero ---------------------------------------------------------------- */
.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6.5rem) var(--gutter) clamp(3rem, 6vw, 5rem);
  overflow: hidden;
}
.hero::before {   /* engineering grid */
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 92px 92px;
  opacity: .35;
  mask-image: radial-gradient(120% 90% at 20% 0%, #000 15%, transparent 72%);
}
.hero::after {   /* single soft light source, top-right */
  content: ''; position: absolute; top: -30%; right: -10%;
  width: 60vw; height: 60vw; pointer-events: none;
  background: radial-gradient(circle, color-mix(in srgb, var(--blue) 22%, transparent) 0%, transparent 62%);
}
.hero__grid {
  position: relative; z-index: 1;
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: repeat(12, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem); align-items: center;
}
.hero__copy { grid-column: 1 / 7; }
.specimen { grid-column: 8 / 13; margin: 0; }

.eyebrow { font-size: .7rem; color: var(--blue); font-weight: 600; }
.eyebrow__sep { color: var(--coral); margin: 0 .35rem; }

h1 {
  display: flex; flex-wrap: wrap;
  margin: .5rem 0 1.25rem;
  font-size: clamp(3.6rem, 11vw, 7.5rem);
  line-height: .82; letter-spacing: -.045em;
}
.h1-line--alt { color: var(--blue); }
.lede { font-size: clamp(1.02rem, 1.4vw, 1.18rem); max-width: 34rem; color: var(--text); }

.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.9rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .85rem 1.4rem; border-radius: 10px;
  font: 600 .78rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .08em;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), background .25s, border-color .25s, color .25s;
}
.btn--solid {
  background: var(--blue); color: var(--ink-900);
  box-shadow: 0 10px 30px -12px color-mix(in srgb, var(--blue) 70%, transparent);
}
.btn--solid:hover { background: var(--blue-soft); transform: translateY(-2px); }
.btn--ghost { border-color: var(--line-hi); color: var(--paper); background: var(--ink-800); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue-soft); transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.985); }

.spec-strip {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 2.75rem; border-top: 1px solid var(--line);
}
.spec-strip__item { padding: 1rem 1rem 0 0; border-right: 1px solid var(--line); }
.spec-strip__item:last-child { border-right: 0; }
.spec-strip__item + .spec-strip__item { padding-left: 1rem; }
.spec-strip dt { font-size: .58rem; color: var(--text-dim); }
.spec-strip dd {
  margin-top: .3rem; font-family: var(--font-display); font-weight: 600;
  font-size: .95rem; color: var(--paper);
}

/* specimen frame — slight tilt, straightens on hover */
.specimen__frame {
  position: relative; padding: 12px;
  border: 1px solid var(--line-hi); border-radius: 20px;
  background: linear-gradient(160deg, var(--ink-700), var(--ink-850));
  transform: rotate(-1.4deg);
  transition: transform .5s var(--ease);
  box-shadow: 0 40px 80px -40px #000;
}
.specimen:hover .specimen__frame { transform: rotate(0deg) scale(1.012); }
.specimen__frame img { border-radius: 12px; }
.tick { position: absolute; width: 12px; height: 12px; border: 1px solid var(--blue); }
.tick--tl { top: 4px; left: 4px; border-right: 0; border-bottom: 0; }
.tick--tr { top: 4px; right: 4px; border-left: 0; border-bottom: 0; }
.tick--bl { bottom: 4px; left: 4px; border-right: 0; border-top: 0; }
.tick--br { bottom: 4px; right: 4px; border-left: 0; border-top: 0; }
.specimen figcaption {
  display: flex; justify-content: space-between; gap: 1rem;
  margin-top: .9rem; padding: 0 .25rem;
  font: 400 .6rem var(--font-mono); text-transform: uppercase;
  letter-spacing: .1em; color: var(--text-dim);
}

/* --- marquee ------------------------------------------------------------- */
.marquee {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: var(--ink-850); overflow: hidden; padding: .85rem 0;
}
.marquee__track {
  display: flex; width: max-content;
  animation: slide 34s linear infinite;
}
.marquee__set {
  display: flex; align-items: center; gap: 2rem; padding-right: 2rem;
  font: 600 .8rem var(--font-display); text-transform: uppercase;
  letter-spacing: .16em; color: var(--paper); white-space: nowrap;
}
.marquee__dot { width: 5px; height: 5px; border-radius: 50%; background: var(--coral); flex: none; }
@keyframes slide { to { transform: translateX(-50%); } }

/* --- section scaffolding ------------------------------------------------- */
.section {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(4rem, 9vw, 7.5rem) var(--gutter);
}
.section__head { margin-bottom: clamp(2rem, 4vw, 3.25rem); }
.section__num { display: block; font-size: .66rem; color: var(--coral); margin-bottom: .7rem; }
.section h2 {
  font-size: clamp(2.1rem, 5vw, 3.6rem); line-height: 1; letter-spacing: -.035em;
}
.section h2 em { color: var(--blue); }

/* --- 01 identity --------------------------------------------------------- */
.split {
  display: grid; grid-template-columns: repeat(12, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem); align-items: start;
}
.split__main { grid-column: 1 / 7; display: grid; gap: 1.15rem; }
.split__aside { grid-column: 8 / 13; display: grid; gap: 1rem; }
.statement {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.3rem, 2.4vw, 1.85rem); line-height: 1.3;
  letter-spacing: -.02em; color: var(--paper);
  padding-left: 1.1rem; border-left: 2px solid var(--blue);
}

.panel {
  padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-850));
}
.panel__label { font-size: .58rem; color: var(--text-dim); margin-bottom: .9rem; }
.rows { display: grid; }
.rows > div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: .6rem 0; border-top: 1px dashed var(--line);
}
.rows > div:first-child { border-top: 0; padding-top: 0; }
.rows dt { font-size: .58rem; color: var(--text-dim); }
.rows dd { font-size: .88rem; color: var(--paper); text-align: right; }
.swatch {
  display: inline-block; width: 9px; height: 9px; border-radius: 2px;
  margin-left: .35rem; vertical-align: baseline;
}
.swatch--blue { background: var(--blue); }
.swatch--coral { background: var(--coral); }

/* pop console */
.panel--pop { display: grid; gap: 1rem; justify-items: center; text-align: center; }
.panel--pop .panel__label { justify-self: start; margin-bottom: 0; }
.pop-btn {
  position: relative; width: 92px; height: 92px; border-radius: 50%;
  border: 1px solid var(--blue); background: var(--ink-700); cursor: pointer;
  font: 800 1.05rem var(--font-display); text-transform: uppercase;
  letter-spacing: .04em; color: var(--paper);
  transition: transform .18s var(--ease), background .25s, color .25s;
}
.pop-btn:hover { background: var(--blue); color: var(--ink-900); }
.pop-btn:active { transform: scale(.9); }
.pop-btn.is-popping { animation: popjump .38s var(--ease); }
@keyframes popjump {
  0% { transform: scale(1); } 35% { transform: scale(1.16); } 100% { transform: scale(1); }
}
.pop-btn__ring {
  position: absolute; inset: -1px; border-radius: 50%;
  border: 1px solid var(--blue); opacity: 0;
}
.pop-btn.is-popping .pop-btn__ring { animation: ripple .6s var(--ease); }
.pop-btn.is-popping .pop-btn__ring--2 { animation: ripple .6s .1s var(--ease); }
@keyframes ripple {
  from { opacity: .7; transform: scale(1); }
  to   { opacity: 0; transform: scale(1.7); }
}
.pop-chart { width: 100%; height: 46px; }
.pop-chart rect { fill: var(--blue); transform-box: fill-box; transform-origin: bottom; }
.pop-chart rect.is-new { fill: var(--coral); animation: grow .35s var(--ease); }
@keyframes grow { from { transform: scaleY(.05); } to { transform: scaleY(1); } }
.pop-count { display: grid; gap: .2rem; }
.pop-count > span:first-child {
  font: 800 1.7rem var(--font-display); color: var(--paper); font-variant-numeric: tabular-nums;
}
.pop-count__label {
  font: 400 .56rem var(--font-mono); text-transform: uppercase;
  letter-spacing: .12em; color: var(--text-dim);
}

/* --- 02 lore ------------------------------------------------------------- */
.chapters { display: grid; gap: clamp(1rem, 2.5vw, 1.6rem); }
.chapter {
  position: relative; max-width: 46rem;
  padding: 1.6rem 1.75rem 1.6rem 4.25rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(115deg, var(--ink-800) 0%, var(--ink-850) 70%);
  transition: border-color .3s, transform .3s var(--ease);
}
.chapter:hover { border-color: var(--line-hi); transform: translateX(4px); }
.chapter--offset { margin-left: auto; }
.chapter__index {
  position: absolute; left: 1.6rem; top: 1.7rem;
  font: 600 .7rem var(--font-mono); text-transform: uppercase;
  letter-spacing: .06em; color: var(--blue);
}
.chapter h3 { font-size: 1.2rem; letter-spacing: -.015em; margin-bottom: .5rem; }
.chapter p { color: var(--text-dim); }
.pop-word {
  color: var(--coral); font-weight: 800;
  display: inline-block; animation: nudge 4.5s ease-in-out infinite;
}
@keyframes nudge {
  0%, 82%, 100% { transform: scale(1) rotate(0); }
  88% { transform: scale(1.14) rotate(-3deg); }
  94% { transform: scale(1.02) rotate(1deg); }
}

/* --- 03 trajectory ------------------------------------------------------- */
.track {
  display: grid; grid-template-columns: repeat(12, 1fr);
  row-gap: clamp(1rem, 2.5vw, 1.75rem);
}
.phase {
  padding: 1.6rem 1.7rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--ink-850);
  transition: border-color .3s, background .3s;
}
.phase::before {
  content: ''; display: block; width: 34px; height: 2px;
  background: var(--blue); margin-bottom: 1.1rem;
  transition: width .45s var(--ease);
}
.phase:hover { border-color: var(--line-hi); background: var(--ink-800); }
.phase:hover::before { width: 64px; }
.phase--a { grid-column: 1 / 7; }
.phase--b { grid-column: 4 / 11; }
.phase--c { grid-column: 7 / 13; }
.phase__tag { font-size: .58rem; color: var(--coral); }
.phase h3 { font-size: 1.35rem; letter-spacing: -.02em; margin: .5rem 0 .55rem; }
.phase p { color: var(--text-dim); }

/* --- 04 assets ----------------------------------------------------------- */
.section--assets { padding-bottom: clamp(4rem, 8vw, 6.5rem); }
.asset-panel {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
  padding: clamp(1.75rem, 4vw, 3.25rem);
  border: 1px solid var(--line-hi); border-radius: 22px;
  background:
    radial-gradient(90% 120% at 100% 0%, color-mix(in srgb, var(--blue) 14%, transparent), transparent 60%),
    linear-gradient(160deg, var(--ink-700), var(--ink-900));
}
.asset-panel .section__head { margin-bottom: 1.25rem; }
.asset-panel__copy > p { color: var(--text); max-width: 34rem; }
.asset-facts { display: grid; gap: .5rem; margin: 1.5rem 0 1.9rem; }
.asset-facts li {
  display: grid; grid-template-columns: 6.5rem 1fr; gap: 1rem;
  padding-bottom: .5rem; border-bottom: 1px dashed var(--line);
  font-size: .88rem; color: var(--paper);
}
.asset-facts span {
  font: 400 .58rem var(--font-mono); text-transform: uppercase;
  letter-spacing: .1em; color: var(--text-dim);
}
.asset-panel__art img {
  border-radius: 16px; border: 1px solid var(--line-hi);
  box-shadow: 0 30px 70px -35px #000;
}

/* --- footer -------------------------------------------------------------- */
.footer {
  display: grid; gap: .4rem; justify-items: center; text-align: center;
  padding: clamp(2.5rem, 5vw, 4rem) var(--gutter);
  border-top: 1px solid var(--line); background: var(--ink-850);
}
.footer__brand {
  font-family: var(--font-display); font-weight: 800; font-size: 1.4rem;
  letter-spacing: -.02em; color: var(--paper);
}
.footer__brand em { color: var(--blue); }
.footer__motto {
  font: 400 .66rem var(--font-mono); text-transform: uppercase;
  letter-spacing: .18em; color: var(--blue-soft);
}
.footer__meta { font-size: .78rem; color: var(--text-dim); }

/* --- reveal on scroll ---------------------------------------------------- */
.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* --- responsive ---------------------------------------------------------- */
@media (max-width: 1040px) {
  .hero__copy, .specimen,
  .split__main, .split__aside,
  .phase--a, .phase--b, .phase--c { grid-column: 1 / -1; }
  .specimen { max-width: 480px; }
  .split__aside { grid-template-columns: 1fr 1fr; }
  .chapter--offset { margin-left: 0; }
  .asset-panel { grid-template-columns: 1fr; }
  .asset-panel__art { max-width: 380px; }
}

@media (max-width: 780px) {
  .topbar { flex-wrap: wrap; gap: .75rem 1rem; }
  .nav {
    order: 3; width: 100%; gap: 1.25rem;
    overflow-x: auto; padding-bottom: .15rem;
    scrollbar-width: none;
  }
  .nav::-webkit-scrollbar { display: none; }
  .spec-strip { grid-template-columns: 1fr 1fr; }
  .spec-strip__item:nth-child(2n) { border-right: 0; }
  .spec-strip__item:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: .25rem; }
  .split__aside { grid-template-columns: 1fr; }
  .chapter { padding: 1.35rem 1.25rem 1.35rem 1.25rem; }
  .chapter__index { position: static; display: block; margin-bottom: .5rem; }
}

/* --- motion & contrast preferences -------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .marquee__track { animation: none; }
  .specimen__frame { transform: none; }
}