:root{--bg:#0f0e17;--panel:#1a1925;--panel-2:#232234;--text:#fffffe;--muted:#a7a9be;--accent:#ff8906;--accent-2:#f25f4c;--good:#2cb67d;--border:#2a2937}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent)}button{cursor:pointer}button,input{font:inherit}.container{max-width:960px;margin:0 auto;padding:24px 16px 64px}.brand{font-weight:900;letter-spacing:-.04em;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px}.btn{border:none;border-radius:12px;padding:12px 18px;font-weight:700;color:#1a1925;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{border:1px solid var(--border)}.btn-ghost,.field{background:var(--panel-2);color:var(--text)}.field{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border);outline:none}.field:focus{border-color:var(--accent)}.muted{color:var(--muted)}.row{display:flex;gap:10px}.pill,.row{align-items:center}.pill{display:inline-flex;gap:6px;padding:4px 10px;border-radius:999px;background:var(--panel-2);border:1px solid var(--border);font-size:13px}.dot{width:8px;height:8px;border-radius:50%;background:var(--good)}.dot.off{background:var(--muted)}.reaction-layer{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}.reaction{position:absolute;bottom:80px;font-size:36px;animation:floatUp 2.4s ease-out forwards}.reaction small{display:block;font-size:11px;text-align:center;color:var(--muted)}@keyframes floatUp{0%{transform:translateY(0) scale(.6);opacity:0}15%{opacity:1;transform:translateY(-20px) scale(1.1)}to{transform:translateY(-320px) scale(1);opacity:0}}.chat-log{height:320px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding-right:6px}.chat-line{font-size:14px}.chat-line b{color:var(--accent)}.chat-gif{max-width:100%;margin-top:4px;border-radius:10px;display:block}.gif-scroll{max-height:320px;overflow-y:auto}.gif-grid{column-count:2;column-gap:8px}.gif-result{display:block;width:100%;margin:0 0 8px;page-break-inside:avoid;break-inside:avoid;padding:0;border:1px solid var(--border);border-radius:8px;overflow:hidden;background:var(--panel-2);cursor:pointer;line-height:0}.gif-result img{width:100%;height:auto;display:block}.gif-result:hover{border-color:var(--accent)}.letter-badge{justify-self:center;width:96px;height:96px;border-radius:24px;border:3px solid var(--accent);display:flex;align-items:center;justify-content:center;font-size:52px;font-weight:900;background:var(--panel-2)}.timer-track{width:100%;height:10px;border-radius:999px;background:var(--panel-2);overflow:hidden;border:1px solid var(--border)}.timer-fill{height:100%;border-radius:999px;transition:width .12s linear}.room-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;grid-gap:16px;gap:16px;align-items:start}@media (max-width:760px){.room-grid{grid-template-columns:1fr}.container{padding:16px 12px 56px}.letter-badge{width:84px;height:84px;font-size:44px}.btn{padding:14px 18px}.field{padding:14px;font-size:16px}}.hero{text-align:center;display:grid;grid-gap:16px;gap:16px;padding:16px 0 8px}.hero-title{font-size:clamp(48px,11vw,92px);line-height:1;margin:8px 0 0}.hero-hook{font-size:clamp(18px,3.6vw,27px);margin:0}.hero-sub{max-width:620px;margin:0 auto;font-size:15px;line-height:1.5}.play-card{display:grid;grid-gap:14px;gap:14px;max-width:460px;width:100%;margin:8px auto 0;text-align:left}.hr{flex:1 1;height:1px;background:var(--border)}.section{margin-top:52px}.section-title{text-align:center;font-size:24px;margin:0 0 18px}.steps{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:14px;gap:14px}.step{display:grid;grid-gap:8px;gap:8px;align-content:start}.step-n{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:900;color:#1a1925;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.step-title{font-weight:700}.step-body{font-size:14px;line-height:1.45}.cat-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:16px}.cat-pill{font-size:14px;padding:8px 14px}.closing{text-align:center}.chain-card{max-width:620px;width:100%;margin:4px auto 0;display:grid;grid-gap:12px;gap:12px}.chain-cap{font-size:12px;text-align:center}.chain-demo{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center;min-height:84px}.chain-pill{padding:8px 14px;border-radius:999px;background:var(--panel-2);border:1px solid var(--border);font-weight:700;font-size:15px;opacity:0;transform:translateY(8px) scale(.92);transition:opacity .35s ease,transform .35s ease}.chain-pill.in{opacity:1;transform:none}.chain-arrow{color:var(--muted);font-size:13px;letter-spacing:1px;opacity:0;transition:opacity .35s ease}.chain-arrow.in{opacity:1}.chain-arrow b{color:var(--accent);font-size:15px}.demo-timer .timer-fill{background:linear-gradient(90deg,var(--accent),var(--accent-2));animation:deplete 7.8s linear infinite}@keyframes deplete{0%{width:100%}92%{width:0}to{width:0}}@media (max-width:760px){.steps{grid-template-columns:1fr 1fr}}@media (max-width:460px){.steps{grid-template-columns:1fr}}