:root {
  --canvas: #111315;
  --studio-1: #171a1d;
  --studio-2: #1e2226;
  --studio-3: #272c31;
  --paper: #f4f1e8;
  --ink: #16181a;
  --text: #f7f5ee;
  --text-2: #c9ced1;
  --text-3: #969da2;
  --muted: #6f777c;
  --cyan: #36e6f2;
  --magenta: #ff3fa4;
  --lime: #c8ff3d;
  --orange: #ff8a2b;
  --line: rgba(255,255,255,.14);
  --line-soft: rgba(255,255,255,.08);
  --line-strong: rgba(255,255,255,.34);
  --focus: #fff;
  --unit: 4px;
  --max: 1180px;
  --font: "Noto Sans Bengali", "Hind Siliguri", "Bangla Sangam MN", "Vrinda", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
figure { margin: 0; }
a { color: inherit; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
::selection { background: var(--lime); color: var(--ink); }

.skip-link {
  position: fixed;
  z-index: 100;
  left: 16px;
  top: 16px;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--ink);
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.section { position: relative; padding: clamp(72px, 10vw, 136px) 0; overflow: hidden; }
.section + .section { border-top: 1px solid var(--line-soft); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--cyan);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
}
.eyebrow::before { content: ""; width: 22px; height: 6px; background: currentColor; }
h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(3rem, 8vw, 7.6rem); font-weight: 900; }
h2 { font-size: clamp(2.3rem, 5.2vw, 5rem); font-weight: 900; }
h3 { font-size: clamp(1.35rem, 2.4vw, 2rem); font-weight: 850; }
p { margin: 0; }
.lede { max-width: 700px; color: var(--text-2); font-size: clamp(1.08rem, 1.8vw, 1.3rem); }
.section-head { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: end; margin-bottom: 56px; }
.section-head .lede { justify-self: end; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: rgba(17,19,21,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.header-inner > *, .hero-copy > *, .section-head > *, .workflow-grid > *, .environment-layout > *, .legal-layout > * { min-width: 0; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 900; letter-spacing: -.03em; }
.brand-mark { position: relative; width: 27px; height: 27px; background: var(--cyan); box-shadow: 9px 9px 0 var(--magenta); }
.brand-mark::after { content: ""; position: absolute; width: 9px; height: 9px; right: 0; bottom: 0; background: var(--canvas); }
.site-nav { display: flex; gap: 6px; align-items: center; }
.site-nav a { padding: 10px 13px; color: var(--text-2); text-decoration: none; font-size: .92rem; font-weight: 700; border: 1px solid transparent; }
.site-nav a:hover { color: var(--text); border-color: var(--line); background: var(--studio-2); }
.nav-toggle { display: none; color: var(--text); background: var(--studio-2); border: 1px solid var(--line); padding: 8px 12px; font-weight: 800; }

.hero { padding: clamp(48px, 7vw, 88px) 0 0; }
.hero-kicker { display: flex; justify-content: space-between; gap: 24px; margin-bottom: 24px; color: var(--text-3); font-size: .82rem; font-weight: 800; }
.hero h1 span { color: var(--cyan); }
.hero-copy { display: grid; grid-template-columns: 1.45fr .55fr; gap: 48px; align-items: end; margin-bottom: 40px; }
.hero-copy .lede { padding-bottom: 12px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 10px 18px; text-decoration: none; font-weight: 850; border: 1px solid var(--line-strong); transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translate(-3px,-3px); }
.button.primary { background: var(--lime); color: var(--ink); border-color: var(--lime); box-shadow: 4px 4px 0 var(--magenta); }
.button.secondary { background: var(--studio-2); }
.hero-art { position: relative; background: var(--studio-2); border: 1px solid var(--line-strong); padding: 12px; }
.hero-art::before, .art-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 1;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero-art img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.frame-label { position: absolute; z-index: 2; right: 24px; bottom: 24px; padding: 8px 12px; background: var(--canvas); border-left: 6px solid var(--orange); color: var(--text-2); font-size: .78rem; font-weight: 800; }

.fundamentals { background: var(--paper); color: var(--ink); }
.fundamentals .lede { color: #494d4f; }
.fundamentals .eyebrow { color: #006e76; }
.principle-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.principle-card { min-height: 250px; padding: 28px; border: 2px solid var(--ink); display: flex; flex-direction: column; justify-content: space-between; }
.principle-card:nth-child(1) { grid-column: span 5; background: var(--cyan); }
.principle-card:nth-child(2) { grid-column: span 3; background: var(--magenta); }
.principle-card:nth-child(3) { grid-column: span 4; background: var(--lime); }
.principle-card:nth-child(4) { grid-column: 3 / span 8; background: var(--orange); min-height: 200px; }
.card-index { align-self: flex-end; font-size: 2.5rem; font-weight: 900; line-height: 1; }
.principle-card p { max-width: 42ch; margin-top: 20px; }

.pixel-workflow { background: var(--canvas); }
.workflow-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 64px; align-items: start; }
.pixel-demo { position: sticky; top: 110px; border: 1px solid var(--line); background: var(--studio-1); padding: 20px; }
.pixel-canvas { display: grid; grid-template-columns: repeat(8,1fr); aspect-ratio: 1; border: 1px solid var(--line-strong); }
.pixel-canvas i { display: block; border: 1px solid rgba(255,255,255,.06); background: var(--studio-2); }
.pixel-canvas i:nth-child(3), .pixel-canvas i:nth-child(4), .pixel-canvas i:nth-child(11), .pixel-canvas i:nth-child(12), .pixel-canvas i:nth-child(13), .pixel-canvas i:nth-child(20), .pixel-canvas i:nth-child(21), .pixel-canvas i:nth-child(28), .pixel-canvas i:nth-child(29) { background: var(--cyan); }
.pixel-canvas i:nth-child(37), .pixel-canvas i:nth-child(38), .pixel-canvas i:nth-child(45), .pixel-canvas i:nth-child(46), .pixel-canvas i:nth-child(53), .pixel-canvas i:nth-child(54) { background: var(--magenta); }
.pixel-canvas i:nth-child(30), .pixel-canvas i:nth-child(31), .pixel-canvas i:nth-child(39), .pixel-canvas i:nth-child(47) { background: var(--lime); }
.demo-note { margin-top: 16px; color: var(--text-3); font-size: .85rem; }
.steps { display: grid; gap: 0; counter-reset: workflow; }
.step { position: relative; padding: 28px 24px 30px 78px; border-top: 1px solid var(--line); counter-increment: workflow; }
.step::before { content: attr(data-step); position: absolute; left: 0; top: 24px; color: var(--magenta); font-size: 2rem; font-weight: 900; }
.step p { margin-top: 10px; color: var(--text-2); }
.tip { margin-top: 28px; padding: 18px 20px; background: var(--studio-2); border-left: 6px solid var(--lime); color: var(--text-2); }

.environment { background: var(--studio-1); }
.environment-layout { display: grid; grid-template-columns: 1.4fr .6fr; gap: 28px; align-items: stretch; }
.art-frame { position: relative; padding: 10px; border: 1px solid var(--line-strong); background: var(--studio-2); }
.art-frame img { width: 100%; height: 100%; min-height: 520px; object-fit: cover; }
.layer-notes { display: grid; gap: 12px; }
.layer { padding: 22px; background: var(--studio-2); border-left: 6px solid var(--cyan); }
.layer:nth-child(2) { border-color: var(--orange); }
.layer:nth-child(3) { border-color: var(--magenta); }
.layer small { color: var(--text-3); font-weight: 800; }
.layer h3 { margin: 8px 0 12px; }
.layer p { color: var(--text-2); font-size: .94rem; }

.ui-section { background: var(--paper); color: var(--ink); }
.ui-section .lede { color: #494d4f; }
.ui-section .eyebrow { color: #006e76; }
.ui-board { display: grid; grid-template-columns: 1fr 1fr; border: 2px solid var(--ink); }
.icon-lab, .comparison { padding: clamp(24px,4vw,48px); }
.icon-lab { background: var(--cyan); border-right: 2px solid var(--ink); }
.icon-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; margin-top: 32px; }
.game-icon { aspect-ratio: 1; display: grid; place-items: center; background: var(--ink); color: var(--paper); border: 2px solid var(--ink); font-size: clamp(1.4rem,4vw,2.5rem); font-weight: 900; }
.game-icon:nth-child(2) { background: var(--magenta); color: var(--ink); }
.game-icon:nth-child(3) { background: var(--lime); color: var(--ink); }
.game-icon:nth-child(4) { background: var(--orange); color: var(--ink); }
.comparison { background: var(--paper); }
.compare-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 28px; }
.compare-card { min-height: 180px; padding: 20px; border: 2px solid var(--ink); }
.compare-card.bad { background-image: repeating-linear-gradient(45deg,#c8c3b8 0,#c8c3b8 4px,#e9e4d9 4px,#e9e4d9 8px); }
.compare-card.good { background: var(--lime); }
.compare-card strong { display: block; margin-bottom: 12px; }

.palette-section { background: var(--canvas); }
.palette-strip { display: grid; grid-template-columns: repeat(5, 1fr); min-height: 240px; border: 1px solid var(--line-strong); }
.swatch-button { display: flex; align-items: flex-end; padding: 16px; color: var(--ink); border: 0; cursor: pointer; font-weight: 900; text-align: left; }
.swatch-button:hover { filter: brightness(1.08); }
.swatch-button:nth-child(1) { background: #171a1d; color: var(--text); }
.swatch-button:nth-child(2) { background: var(--cyan); }
.swatch-button:nth-child(3) { background: var(--magenta); }
.swatch-button:nth-child(4) { background: var(--lime); }
.swatch-button:nth-child(5) { background: var(--orange); }
#palette-message { min-height: 28px; margin-top: 16px; color: var(--text-2); }
.palette-rules { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 48px; }
.palette-rule { padding: 22px; background: var(--studio-2); border-top: 6px solid var(--cyan); }
.palette-rule:nth-child(2) { border-color: var(--magenta); }
.palette-rule:nth-child(3) { border-color: var(--orange); }
.palette-rule p { margin-top: 10px; color: var(--text-2); }

.practice { background: var(--magenta); color: var(--ink); }
.practice .eyebrow { color: var(--ink); }
.practice .lede { color: #29121f; }
.exercise-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.exercise { min-height: 320px; padding: 28px; background: var(--paper); border: 2px solid var(--ink); display: flex; flex-direction: column; }
.exercise-time { display: inline-block; align-self: flex-start; padding: 5px 9px; background: var(--ink); color: var(--paper); font-size: .78rem; font-weight: 850; }
.exercise h3 { margin-top: 38px; }
.exercise p { margin: 18px 0 26px; }
.exercise ol { margin: auto 0 0; padding-left: 24px; }

.site-footer { padding: 64px 0 28px; background: var(--canvas); border-top: 1px solid var(--line); }
.footer-main { display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: start; }
.footer-copy { max-width: 570px; color: var(--text-2); margin-top: 18px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: var(--text-2); text-decoration: none; }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom { margin-top: 56px; padding-top: 18px; border-top: 1px solid var(--line-soft); display: flex; justify-content: space-between; gap: 20px; color: var(--text-3); font-size: .82rem; }

.legal-hero { padding: 80px 0 56px; border-bottom: 1px solid var(--line); }
.legal-hero h1 { max-width: 920px; font-size: clamp(3rem,7vw,6rem); }
.legal-hero .lede { margin-top: 28px; }
.legal-layout { display: grid; grid-template-columns: 260px minmax(0,760px); gap: 80px; padding: 72px 0 110px; }
.legal-nav { position: sticky; top: 110px; align-self: start; padding: 20px; background: var(--studio-1); border: 1px solid var(--line); }
.legal-nav strong { display: block; color: var(--cyan); margin-bottom: 12px; }
.legal-nav a { display: block; padding: 8px 0; color: var(--text-2); text-decoration: none; border-bottom: 1px solid var(--line-soft); }
.legal-nav a:hover { color: var(--text); }
.legal-content { min-width: 0; }
.legal-content section { padding: 0 0 44px; margin-bottom: 44px; border-bottom: 1px solid var(--line); scroll-margin-top: 110px; }
.legal-content h2 { font-size: clamp(1.8rem,3.2vw,2.7rem); margin-bottom: 20px; }
.legal-content h3 { font-size: 1.25rem; margin: 26px 0 12px; }
.legal-content p, .legal-content li { color: var(--text-2); }
.legal-content p + p { margin-top: 16px; }
.legal-content ul { padding-left: 24px; }
.legal-note { padding: 20px; background: var(--studio-2); border-left: 6px solid var(--orange); }

.js [data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .section-head, .hero-copy, .workflow-grid, .environment-layout, .legal-layout { grid-template-columns: 1fr; }
  .section-head .lede { justify-self: start; }
  .hero-copy { gap: 18px; }
  .pixel-demo, .legal-nav { position: static; }
  .principle-card:nth-child(n) { grid-column: span 6; }
  .ui-board { grid-template-columns: 1fr; }
  .icon-lab { border-right: 0; border-bottom: 2px solid var(--ink); }
  .exercise-grid { grid-template-columns: 1fr 1fr; }
  .legal-layout { gap: 32px; }
  .legal-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
  .legal-nav strong { grid-column: 1/-1; }
}

@media (max-width: 700px) {
  body { font-size: 16px; }
  .container { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 66px; }
  .nav-toggle { display: block; }
  .site-nav { position: absolute; display: none; top: 66px; left: 0; right: 0; padding: 14px; background: var(--canvas); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 13px; }
  .hero-kicker { flex-direction: column; gap: 4px; }
  .hero h1 { font-size: clamp(2.65rem, 13vw, 4rem); }
  .hero-copy p, .legal-content p, .legal-content li { overflow-wrap: anywhere; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-card:nth-child(n) { grid-column: 1; min-height: 220px; }
  .art-frame img { min-height: 350px; }
  .palette-strip { grid-template-columns: 1fr; min-height: 0; }
  .swatch-button { min-height: 82px; }
  .palette-rules, .exercise-grid { grid-template-columns: 1fr; }
  .compare-row { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .legal-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}