.art-chroma .cc { background: var(--c); border: 6px solid #fff; box-shadow: 0 22px 40px rgb(20 8 50 / 35%); transform-origin: 50% 140%;
  transform: rotate(var(--r)); animation: fan 4s ease-in-out infinite; animation-delay: var(--d); }
.art-chroma .c0 { --r: -24deg; --d: 0s; }
.art-chroma .c1 { --r: -12deg; --d: .25s; }
.art-chroma .c2 { --r: 0deg; --d: .5s; }
.art-chroma .c3 { --r: 12deg; --d: .75s; }
.art-chroma .c4 { --r: 24deg; --d: 1s; }
@keyframes fan { 50% { transform: rotate(calc(var(--r) * 1.12)) translateY(-10px); } }
/* The home page: intro, the featured carousel, apps, lab, blog and about. Lab index cards reuse this file. */

.hero { padding: clamp(36px, 6vw, 72px) 0 0; }
.hero-intro { max-width: 760px; margin-bottom: clamp(26px, 4vw, 40px); }
.hero-intro p { color: var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); max-width: 620px; margin: 0; }
.grad { background: linear-gradient(100deg, var(--accent) 10%, var(--rose) 55%, #FF9B3D 95%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* carousel: a scroll-snap track (native swipe), JS adds autoplay, dots and arrows */
.carousel { position: relative; }
.track { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; border-radius: var(--r-l);
  scrollbar-width: none; overscroll-behavior-x: contain; box-shadow: var(--shadow-2); outline-offset: 4px; }
.track::-webkit-scrollbar { display: none; }
@media (prefers-reduced-motion: reduce) { .track { scroll-behavior: auto; } }
.slide { flex: 0 0 100%; scroll-snap-align: start; scroll-snap-stop: always; position: relative; overflow: hidden; min-height: 500px;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); align-items: center; gap: 24px; padding: 56px clamp(28px, 5vw, 64px);
  color: var(--ink); background: var(--slide-bg); }
.slide-copy { position: relative; z-index: 2; max-width: 460px; }
.slide h2 { font-size: clamp(2rem, 4.4vw, 3.2rem); margin-bottom: 14px; }
.slide .eyebrow { color: var(--muted); }
.slide-pitch { color: var(--muted); font-size: 1.1rem; margin-bottom: 26px; }
.slide .btn-primary { background: var(--ink); color: var(--bg); }
.slide-art { position: relative; height: 400px; z-index: 1; }

/* each slide wears its subject's colours, whatever the page theme */
.slide-retroready { --ink: #241B35; --bg: #FFF7EC; --muted: #6F6480;
  --slide-bg: radial-gradient(120% 90% at 85% 20%, #FFD9A8 0%, transparent 55%), radial-gradient(90% 80% at 10% 110%, #FFC9B8 0%, transparent 60%), #FFF1DC; }
.slide-easing { --ink: #F3F1FA; --bg: #14121C; --muted: #ABA6BB;
  --slide-bg: radial-gradient(70% 90% at 80% 30%, rgb(142 128 255 / 38%) 0%, transparent 60%), radial-gradient(60% 70% at 100% 100%, rgb(255 111 154 / 30%) 0%, transparent 60%), #121019; }
.slide-chroma-packs { --ink: #FFFFFF; --bg: #24123F; --muted: rgb(255 255 255 / 82%);
  --slide-bg: radial-gradient(80% 90% at 85% 25%, #FF8FB3 0%, transparent 55%), linear-gradient(135deg, #3A1A78 0%, #7A3BD9 50%, #2E6BE6 100%); }

/* RetroReady: two phones and the mascot */
.art-retro .phone { position: absolute; width: min(200px, 42%); border-radius: 30px; border: 6px solid #241B35; background: #241B35;
  box-shadow: 0 30px 60px rgb(36 27 53 / 28%); }
.art-retro .p1 { left: 14%; top: 14px; transform: rotate(-7deg); }
.art-retro .p2 { left: 47%; top: 0; transform: rotate(5deg); }
.art-retro .mascot { position: absolute; width: 120px; left: 2%; bottom: -6px; filter: drop-shadow(0 12px 16px rgb(36 27 53 / 25%)); animation: bob 3.2s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-8px) rotate(-3deg); } }

/* Easing Studio: a live curve and a ball riding it */
.art-easing { display: grid; place-items: center; align-content: center; gap: 18px; }
.ease-graph { width: min(300px, 80%); overflow: visible; }
.ease-grid path { stroke: rgb(255 255 255 / 22%); stroke-width: 1.5; fill: none; }
.ease-handle { stroke: rgb(255 255 255 / 45%); stroke-width: 2; stroke-dasharray: 4 5; fill: none; }
.ease-curve { stroke: url(#eg); stroke-width: 5; fill: none; stroke-linecap: round; stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 3.2s var(--ease-out) infinite; }
@keyframes draw { 0% { stroke-dashoffset: 1; } 45%, 100% { stroke-dashoffset: 0; } }
.ease-knob { fill: #fff; stroke: #8E80FF; stroke-width: 3; }
.ease-track { width: min(300px, 80%); height: 14px; border-radius: 999px; background: rgb(255 255 255 / 10%); position: relative; }
.ease-ball { position: absolute; top: -5px; left: 0; width: 24px; height: 24px; border-radius: 50%; background: linear-gradient(135deg, #8E80FF, #FF6F9A);
  box-shadow: 0 6px 18px rgb(142 128 255 / 55%); animation: ride 1.6s cubic-bezier(.3, 1, .6, 1) infinite alternate; }
@keyframes ride { to { left: calc(100% - 24px); } }
.ease-langs { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; list-style: none; padding: 0; margin: 4px 0 0; }
.ease-langs li { font: 600 .78rem/1 var(--mono); padding: 7px 10px; border-radius: 999px; background: rgb(255 255 255 / 9%); color: #DCD7EA; }

/* Chroma Packs: a fan of pure-colour cards */
.art-chroma { display: grid; place-items: center; }
.art-chroma .cc, .art-chroma .pack { position: absolute; top: 50%; left: 50%; width: 132px; height: 186px; margin: -93px 0 0 -66px; border-radius: 16px; }
.art-chroma .cc { background: var(--c); border: 6px solid #fff; box-shadow: 0 22px 40px rgb(20 8 50 / 35%);
  transform: rotate(var(--r)) translate(var(--x), var(--y)); animation: float 4s ease-in-out infinite; animation-delay: var(--d); }
.art-chroma .c0 { --r: -24deg; --x: -118px; --y: 22px; --d: 0s; }
.art-chroma .c1 { --r: -12deg; --x: -60px; --y: 2px; --d: .3s; }
.art-chroma .c2 { --r: 0deg; --x: 0px; --y: -8px; --d: .6s; }
.art-chroma .c3 { --r: 12deg; --x: 60px; --y: 2px; --d: .9s; }
.art-chroma .c4 { --r: 24deg; --x: 118px; --y: 22px; --d: 1.2s; }
@keyframes float { 50% { transform: rotate(var(--r)) translate(var(--x), calc(var(--y) - 12px)); } }
.art-chroma .pack { width: 170px; height: 240px; margin: -110px 0 0 -85px; transform: rotate(-8deg) translateY(60px);
  background: linear-gradient(120deg, #E9E4FF 0%, #FFFFFF 30%, #FFD6E6 55%, #D8F0FF 80%); opacity: .35; filter: blur(.5px); }

.carousel-ui { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 18px; }
.arrow { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); color: var(--ink); display: grid; place-items: center;
  cursor: pointer; transition: background .15s, transform .15s var(--ease-out); }
.arrow:hover { background: var(--raised); }
.arrow:active { transform: scale(.92); }
.arrow svg { width: 18px; height: 18px; }
.pause .i-play { display: none; }
.pause[aria-pressed="true"] .i-play { display: block; }
.pause[aria-pressed="true"] .i-pause { display: none; }
.dots { display: flex; gap: 8px; padding: 0 8px; }
.dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 999px; background: var(--line); cursor: pointer; overflow: hidden; position: relative;
  transition: width .35s var(--ease-out), background .2s; }
.dot.active { width: 34px; background: color-mix(in srgb, var(--ink) 18%, var(--line)); }
.dot span { position: absolute; inset: 0; width: 0; background: var(--ink); border-radius: inherit; }
.dot.active span { width: 100%; }
.carousel.playing .dot.active span { width: 0; animation: fill var(--slide-ms, 6500ms) linear forwards; }
@keyframes fill { to { width: 100%; } }

@media (max-width: 820px) {
  .slide { grid-template-columns: 1fr; align-content: start; min-height: 640px; padding: 34px 24px 0; gap: 8px; }
  .slide-art { height: 320px; }
  .art-retro .phone { width: 150px; }
  .art-retro .p1 { left: 16%; } .art-retro .p2 { left: 48%; }
  .art-retro .mascot { width: 92px; }
  .art-chroma { transform: scale(.82); }
}
@media (max-width: 400px) { .slide h2 { font-size: 2rem; } .art-chroma { transform: scale(.7); } }

/* app and tool cards */
a.app-card { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 20px; align-items: start; }
.app-icon { width: 72px; height: 72px; border-radius: 18px; box-shadow: 0 6px 18px rgb(36 27 53 / 16%); }
.app-card h3 .muted { font-weight: 600; }
.app-platforms { margin-top: 12px !important; font-size: .92rem; color: var(--faint) !important; }
.link-like { color: var(--accent-ink); font-weight: 650; }
.next-card { border-style: dashed; background: transparent; box-shadow: none; display: flex; flex-direction: column; justify-content: center; }
.tool-kind { display: inline-block; font: 700 .72rem/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--tool, var(--accent)); margin-bottom: 12px; }
.tool-card { overflow: hidden; padding-top: 0; }
.tool-visual { height: 150px; margin: 0 -26px 22px; display: grid; place-items: center; background: var(--tool-bg, var(--raised)); position: relative; overflow: hidden; }
.tool-card:hover .tool-visual > * { transform: scale(1.05); }
.tool-visual > * { transition: transform .5s var(--ease-out); }
.tv-easing { --tool-bg: radial-gradient(90% 120% at 80% 0%, rgb(142 128 255 / 45%), transparent 60%), #15131D; }
.tv-easing svg { width: 200px; }
.tv-chroma-packs { --tool-bg: linear-gradient(135deg, #3A1A78, #7A3BD9 55%, #2E6BE6); }
.tv-chroma-packs .row { display: flex; }
.tv-chroma-packs .row span { width: 54px; height: 76px; border-radius: 9px; border: 4px solid #fff; margin: 0 -9px; background: var(--c);
  box-shadow: 0 10px 20px rgb(20 8 50 / 35%); transform: rotate(var(--r)) translateY(var(--y)); }

/* about */
.about { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 6vw, 72px); align-items: start; }
.about-grid p { color: var(--muted); font-size: 1.06rem; }
.principles { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.principles li { background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-m); padding: 16px 18px; color: var(--muted); }
.principles strong { color: var(--ink); display: block; margin-bottom: 2px; }
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; } }