:root{color-scheme:dark;--yellow:#ffd21f;--bg:#060911}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:white}.stage{position:relative;width:100%;height:100svh;min-height:420px;display:grid;place-items:center;overflow:hidden;background:radial-gradient(ellipse at 50% 47%,#0c1220 0%,#060911 58%,#03050b 100%)}#ambient,.vignette{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.vignette{background:radial-gradient(ellipse at center,transparent 20%,rgba(0,0,0,.46) 100%)}.center{z-index:2;width:min(82vw,720px);text-align:center;transform:translateY(-1%)}.logo{display:flex;flex-direction:column;align-items:center;gap:14px}.symbol{width:clamp(98px,13vw,166px);filter:drop-shadow(0 0 24px rgba(255,204,40,.09));opacity:0;transform:translateY(26px) scale(.92);animation:symbolIn 1.5s .2s cubic-bezier(.2,.75,.2,1) forwards}.symbol svg{width:100%;display:block}.symbol .shape{transform-origin:center;animation:float 7s 2.6s ease-in-out infinite}.collar{opacity:0;animation:collarIn .5s 1.2s forwards}.word{font-weight:650;font-size:clamp(58px,9.2vw,126px);line-height:1.08;letter-spacing:.055em;color:var(--yellow);opacity:0;transform:translateY(18px);animation:wordIn 1.2s 1.3s cubic-bezier(.2,.75,.2,1) forwards}.line{height:1px;background:rgba(255,210,31,.14);width:100%;margin:12px auto 24px;position:relative;overflow:hidden;opacity:0;animation:fade .7s 2.1s forwards}.line span{position:absolute;left:-35%;top:0;width:35%;height:100%;background:linear-gradient(90deg,transparent,var(--yellow),transparent);animation:sweep 3.5s 2.2s ease-in-out infinite}.tagline{font-size:clamp(10px,1.3vw,15px);letter-spacing:clamp(.17em,.6vw,.5em);font-weight:500;color:#e4d5a7;opacity:0;transform:translateY(8px);animation:wordIn .9s 2.15s forwards}.skip{position:absolute;z-index:5;bottom:32px;right:32px;border:1px solid rgba(255,255,255,.24);background:rgba(8,11,19,.55);border-radius:8px;padding:14px 17px;color:#bdc1cc;letter-spacing:.18em;font-size:10px;cursor:pointer;transition:background .2s,color .2s,border-color .2s}.skip:hover,.skip:focus-visible{background:var(--yellow);color:#101010;border-color:var(--yellow)}.skip span{margin-left:10px}.skip.hidden{opacity:0;pointer-events:none;transition:opacity .6s}.footnote{position:absolute;bottom:39px;left:32px;z-index:3;font-size:10px;letter-spacing:.24em;color:#737d91;opacity:0;animation:fade .8s 2.7s forwards}.foot-dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--yellow);vertical-align:middle;margin:0 8px}.stage.done .symbol,.stage.done .word,.stage.done .tagline,.stage.done .line,.stage.done .footnote{animation:none;opacity:1;transform:none}.stage.done .collar{opacity:1}.stage.done .line span{animation:sweep 3.5s ease-in-out infinite}@keyframes symbolIn{to{opacity:1;transform:translateY(0) scale(1)}}@keyframes collarIn{to{opacity:1}}@keyframes wordIn{to{opacity:1;transform:translateY(0)}}@keyframes fade{to{opacity:1}}@keyframes sweep{to{left:105%}}@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}@media(max-width:600px){.center{width:min(86vw,420px)}.word{font-size:clamp(56px,14vw,88px);letter-spacing:.025em}.logo{gap:9px}.line{margin:10px auto 20px}.tagline{font-size:9px;letter-spacing:.22em}.footnote{bottom:24px;left:18px;font-size:8px;letter-spacing:.12em}.skip{bottom:55px;right:18px;font-size:9px;padding:11px 12px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.symbol,.word,.tagline,.line,.footnote,.collar{opacity:1!important;transform:none!important}}

/* Sophia v0.6: color inversion only, approved symbol geometry preserved. */
:root{color-scheme:light;--yellow:#FFD21F;--bg:#FFD21F}
body{background:var(--yellow);color:#fff}
.stage{background:radial-gradient(ellipse at 50% 44%,#ffe86d 0%,#ffd82c 43%,#ffd21f 78%,#f4bf05 100%)}
.vignette{background:radial-gradient(ellipse at center,transparent 45%,rgba(184,123,0,.13) 100%)}
.center{width:min(88vw,1000px)}
.logo{flex-direction:row;justify-content:center;gap:clamp(14px,3vw,36px);align-items:center}
.symbol{width:clamp(95px,14vw,180px);filter:drop-shadow(0 10px 22px rgba(168,115,0,.12));flex:none}
.word{color:#fff;letter-spacing:-.045em;font-size:clamp(62px,11vw,160px);font-weight:750;line-height:1}
.line{background:rgba(255,255,255,.35);max-width:840px}
.line span{background:linear-gradient(90deg,transparent,#fff,transparent)}
.tagline{color:#fff;text-shadow:0 1px 2px rgba(125,89,0,.15)}
.footnote{color:rgba(74,54,0,.75)}
.foot-dot{background:#fff}
.skip{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.75);color:#fff;border-radius:999px}
.skip:hover,.skip:focus-visible{background:#fff;color:#7d5900;border-color:#fff}
@media(max-width:600px){.logo{gap:10px}.symbol{width:clamp(72px,20vw,110px)}.word{font-size:clamp(52px,13vw,86px)}.center{width:94vw}}