/* pearl.css — pearlescent-white design system for the 30x Experience.
   Pearlescent surfaces, soft saffron/teal accents, aquamarine tech glow. */
:root{
  --pearl:#f7f5f2; --pearl-2:#fbfaf8; --ink:#15201f; --ink-soft:#3a4a48;
  --saffron:#ff6b2c; --teal:#2d9f93; --aqua:#19d3c5; --aqua-deep:#0b6b63;
  --line:rgba(20,40,38,.12); --glass:rgba(255,255,255,.62);
  --shadow:0 20px 60px rgba(20,40,38,.14); --font-hud:'Chakra Petch',system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--pearl);color:var(--ink);
  font-family:var(--font-hud);-webkit-font-smoothing:antialiased}
body.exp{overflow:hidden}
.pearl-bg{position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1200px 800px at 12% -10%, #ffe9dd 0%, transparent 55%),
    radial-gradient(1000px 700px at 110% 10%, #d9f3ef 0%, transparent 50%),
    radial-gradient(900px 900px at 50% 120%, #efeaf0 0%, transparent 60%),
    linear-gradient(160deg,#fbfaf8,#f1eef0);}
.pearl-bg::after{content:"";position:absolute;inset:0;opacity:.5;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.55) 48%,transparent 60%);
  mix-blend-mode:screen;animation:sheen 14s linear infinite}
@keyframes sheen{0%{transform:translateX(-30%)}100%{transform:translateX(30%)}}

/* horizontal rail */
.rail{display:flex;height:100vh;width:100vw;overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x mandatory;scroll-behavior:smooth;scrollbar-width:none}
.rail::-webkit-scrollbar{display:none}
.scene{flex:0 0 100vw;height:100vh;scroll-snap-align:start;position:relative;
  display:flex;flex-direction:column;justify-content:center;padding:6vh 7vw;overflow:hidden}
.scene-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-1;opacity:.9}
.scene-scrim{position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(247,245,242,.92) 0%,rgba(247,245,242,.66) 42%,rgba(247,245,242,.28) 100%)}
.scene.dark-scene .scene-scrim{background:linear-gradient(90deg,rgba(6,20,19,.86),rgba(6,20,19,.45))}
.scene.dark-scene{color:#eafffb}

.kicker{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--aqua-deep);font-weight:600}
.scene h1{font-size:clamp(28px,5vw,64px);line-height:1.04;margin:.2em 0;letter-spacing:-.5px}
.scene h2{font-size:clamp(22px,3.4vw,40px);margin:.1em 0 .3em}
.lede{font-size:clamp(15px,1.5vw,20px);max-width:54ch;color:var(--ink-soft);line-height:1.5}
.mr{display:block;font-size:.62em;color:var(--teal);margin-top:.15em;letter-spacing:.3px}

/* glass cards / chips */
.cards{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;max-width:62ch}
.chip{background:var(--glass);border:1px solid var(--line);border-radius:14px;padding:12px 14px;
  backdrop-filter:blur(8px);box-shadow:var(--shadow);max-width:280px;transition:transform .2s,box-shadow .2s}
.chip:hover{transform:translateY(-3px);box-shadow:0 26px 70px rgba(20,40,38,.22)}
.chip .t{font-weight:700;font-size:14px}
.chip .c{font-size:13px;color:var(--ink-soft);margin-top:3px}
.chip .f{font-size:11px;color:var(--saffron);margin-top:6px;display:block}
.chip .s{font-size:11px;color:var(--aqua-deep);margin-top:4px;display:block}

/* which-means tooltip */
[data-mr]{border-bottom:1px dotted var(--teal);cursor:help;position:relative}
[data-mr]:hover::after{content:"“ " attr(data-mr) " ”";position:absolute;left:0;top:-2.2em;
  white-space:nowrap;background:#06201f;color:var(--aqua);font-size:12px;padding:4px 9px;border-radius:8px;
  box-shadow:var(--shadow);z-index:9}

/* chain reaction */
.chain{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:20px;max-width:64ch}
.chain .node{background:rgba(25,211,197,.12);border:1px solid var(--aqua);color:var(--aqua-deep);
  border-radius:999px;padding:7px 13px;font-size:12px;font-weight:600}
.chain .arr{color:var(--saffron);font-weight:800}
.chain-note{font-size:11px;color:var(--ink-soft);margin-top:8px;font-style:italic}

/* REE periodic grid */
.ree-head{margin-top:18px;font-size:13px;font-weight:700;color:var(--aqua-deep);letter-spacing:.4px}
.ree-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;margin-top:8px;max-width:640px}
.ree-t{background:var(--glass);border:1px solid var(--line);border-radius:8px;padding:6px 4px;text-align:center;
  display:flex;flex-direction:column;gap:0;backdrop-filter:blur(6px);min-height:62px;justify-content:center}
.ree-t.au{background:linear-gradient(135deg,#fff4d6,#ffe08a);border-color:#e3b54a}
.ree-t .z{font-size:9px;color:var(--ink-soft)}
.ree-t .sym{font-size:17px;font-weight:700;line-height:1}
.ree-t .nm{font-size:8.5px;color:var(--ink-soft);line-height:1.1;margin-top:1px}
.ree-t .u{font-size:7.5px;color:var(--teal);line-height:1.1}
@media(max-width:760px){.ree-grid{grid-template-columns:repeat(4,1fr)}}

/* nav dots + edge hint */
.dots{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:9px;z-index:20}
.dots b{width:9px;height:9px;border-radius:50%;background:rgba(20,40,38,.22);cursor:pointer;transition:.2s}
.dots b.on{background:var(--saffron);transform:scale(1.35)}
.edge{position:fixed;top:50%;right:18px;transform:translateY(-50%);z-index:20;color:var(--aqua-deep);
  font-size:30px;animation:pulse 1.8s infinite;pointer-events:none}
@keyframes pulse{0%,100%{opacity:.3}50%{opacity:1}}
.topbar{position:fixed;top:0;left:0;right:0;z-index:25;display:flex;justify-content:space-between;
  align-items:center;padding:14px 22px;font-size:13px}
.brand{font-weight:800;letter-spacing:.5px}
.brand .dot{color:var(--saffron)}
.lang{display:flex;gap:6px}
.lang button{border:1px solid var(--line);background:var(--glass);border-radius:10px;padding:5px 10px;
  font-family:inherit;font-size:12px;cursor:pointer}
.lang button.on{background:var(--saffron);color:#fff;border-color:var(--saffron)}
.cta{display:inline-block;margin-top:26px;background:var(--ink);color:#fff;text-decoration:none;
  padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px;box-shadow:var(--shadow)}
.cta.aqua{background:linear-gradient(120deg,var(--aqua),var(--aqua-deep))}

/* blueprint figure */
.blueprint{max-width:min(46vw,520px);border-radius:14px;box-shadow:var(--shadow);border:1px solid var(--line)}
.split{display:flex;gap:30px;align-items:center;flex-wrap:wrap}
.split>div{flex:1 1 320px}

@media(max-width:760px){.scene{padding:9vh 7vw}.blueprint{max-width:90vw}.scene-scrim{
  background:linear-gradient(180deg,rgba(247,245,242,.9),rgba(247,245,242,.5))}}