*{box-sizing:border-box}
html{color-scheme:light}html[data-theme=dark]{color-scheme:dark}
body{margin:0;background:var(--background);color:var(--foreground);font-family:var(--font-sans);line-height:1.5}
.welcome{position:relative;isolation:isolate;min-height:100svh;display:grid;place-items:center;padding:48px 24px 90px;overflow:hidden;text-align:center}
.welcome:before{content:"";position:absolute;inset:0;z-index:-2;background:radial-gradient(ellipse at 50% 34%,color-mix(in srgb,var(--primary) 10%,transparent),transparent 56%),radial-gradient(ellipse at 85% 85%,#9000ff0d,transparent 50%)}
.welcome-content{max-width:760px;animation:welcome-reveal .9s ease-out both}
.welcome-logo{width:160px;height:160px;margin:0 auto 32px;border-radius:32px;background:#fff;box-shadow:0 0 0 10px color-mix(in srgb,var(--primary) 6%,transparent),0 18px 55px #0002;overflow:hidden}
.welcome-logo img{display:block;width:100%;height:100%;object-fit:contain}
.welcome-eyebrow{font:10px var(--font-mono);letter-spacing:.18em;color:var(--primary);margin:0 0 18px}
h1{font-size:clamp(32px,5.2vw,66px);line-height:1.1;letter-spacing:-.045em;margin:0;font-weight:800}
h1 span{display:block;font-size:.32em;letter-spacing:.28em;margin:16px 0 0;font-weight:500}
.welcome-description{font-size:clamp(14px,2vw,18px);margin:26px 0 34px;color:var(--foreground);opacity:.75}
.welcome-enter{display:inline-flex;gap:34px;align-items:center;justify-content:space-between;min-height:60px;padding:9px 10px 9px 28px;border:1px solid color-mix(in srgb,var(--primary) 40%,var(--sidebar-border));border-radius:50px;background:var(--card);color:var(--foreground);text-decoration:none;font-size:15px;font-weight:600;box-shadow:0 8px 30px #0001;transition:transform .2s,box-shadow .2s}
.welcome-arrow{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff;font-size:23px;animation:explore-nudge 2.5s ease-in-out infinite}
.welcome-enter:hover{transform:translateY(-3px);box-shadow:0 12px 35px #ea580c25}
.welcome-enter:focus-visible{outline:3px solid var(--ring);outline-offset:6px}
.welcome-hint{font-size:11px;margin-top:17px;opacity:.6}
.welcome-orbit{position:absolute;left:50%;top:45%;width:min(850px,115vw);aspect-ratio:1;transform:translate(-50%,-50%);z-index:-1;pointer-events:none}
.welcome-orbit i{position:absolute;inset:0;border:1px solid color-mix(in srgb,var(--primary) 10%,transparent);border-radius:50%}
.welcome-orbit i:nth-child(2){inset:12%;border-style:dashed}.welcome-orbit i:nth-child(3){inset:25%}
footer{position:absolute;bottom:24px;left:16px;right:16px;font:9px var(--font-mono);letter-spacing:.12em;opacity:.6}footer span{padding:0 10px;color:var(--primary)}
@keyframes welcome-reveal{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes explore-nudge{0%,70%,100%{transform:none}80%{transform:translate(2px,-2px)}}
@media(max-width:480px){.welcome-logo{width:128px;height:128px}.welcome-eyebrow{font-size:8px;letter-spacing:.1em}footer{font-size:8px}footer span{padding:0 4px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}

.welcome:before{display:none}
.welcome-content{width:100%;max-width:1100px}
.welcome h1{font-size:clamp(16px,4.4vw,57px);white-space:nowrap;letter-spacing:-.04em}
.welcome-logo{width:clamp(200px,28vw,300px);height:clamp(200px,28vw,300px);background:transparent;box-shadow:none;border-radius:0;overflow:visible;perspective:900px;margin-bottom:22px}
.welcome-logo img{filter:drop-shadow(0 12px 8px #0003);transform:rotateX(7deg) rotateY(-7deg);transition:transform .6s ease}
.welcome-logo:hover img{transform:rotateX(0deg) rotateY(5deg) translateY(-5px)}
.entry-circuit{position:absolute;inset:0;display:grid;place-items:center;z-index:-1;pointer-events:none;opacity:.25}
.entry-circuit i{position:absolute;width:min(80vw,730px);aspect-ratio:1.6;border:1px solid var(--primary);clip-path:polygon(0 15%,15% 0,85% 0,100% 15%,100% 85%,85% 100%,15% 100%,0 85%)}
.entry-circuit i:nth-child(2){width:min(90vw,860px);opacity:.5}.entry-circuit i:nth-child(3){width:min(100vw,990px);opacity:.25}
.welcome-pause{position:absolute;top:20px;right:20px;border:1px solid var(--sidebar-border);border-radius:20px;padding:8px 14px;background:var(--card);color:var(--foreground);font:11px var(--font-sans);cursor:pointer}
.welcome-pause:focus-visible{outline:3px solid var(--ring);outline-offset:3px}
.is-entering .welcome-content{animation:entry-out .36s ease-in both}
.is-entering .entry-circuit{animation:circuit-pass .36s ease-out both}
@keyframes entry-out{to{opacity:0;transform:translateY(-10px) scale(1.02)}}
@keyframes circuit-pass{to{opacity:0;transform:scale(1.12)}}

/* Text invitation, with no button enclosure. */
.welcome-enter{display:inline-block;min-height:44px;padding:10px 4px;border:0;border-radius:0;background:transparent;box-shadow:none;color:var(--foreground);font:500 14px var(--font-mono);letter-spacing:.1em;position:relative}
.welcome-enter:after{content:"";display:block;height:1px;margin-top:9px;background:var(--primary);transform:scaleX(.35);opacity:.65;animation:prompt-breathe 2.6s ease-in-out infinite}
.welcome-enter:hover{box-shadow:none;transform:none;color:var(--primary)}
.welcome-enter:hover:after{animation:none;transform:scaleX(1);opacity:1}
@keyframes prompt-breathe{50%{opacity:1;transform:scaleX(.7)}}
.entry-gateway{position:fixed;inset:0;z-index:100;pointer-events:none;visibility:hidden;overflow:hidden}
.entry-gateway>span{position:absolute;inset:0 50% 0 0;background:var(--background);transform:translateX(-101%)}
.entry-gateway>span:last-child{inset:0 0 0 50%;transform:translateX(101%)}
.gateway-lines{position:absolute;inset:0;z-index:1;display:grid;place-items:center;perspective:500px}
.gateway-lines i{position:absolute;width:65vw;height:55vh;border:1px solid var(--primary);clip-path:polygon(0 12%,12% 0,88% 0,100% 12%,100% 88%,88% 100%,12% 100%,0 88%);opacity:0}
.gateway-lines i:nth-child(2){width:80vw;height:70vh}.gateway-lines i:nth-child(3){width:95vw;height:85vh}
.is-entering .entry-gateway{visibility:visible}
.is-entering .entry-gateway>span{animation:gateway-close .65s cubic-bezier(.22,1,.36,1) forwards}
.is-entering .gateway-lines i{animation:gateway-flight .65s ease-in forwards}
.is-entering .gateway-lines i:nth-child(2){animation-delay:.04s}
.is-entering .gateway-lines i:nth-child(3){animation-delay:.08s}
.is-entering .welcome-content{animation:entry-out .55s ease-in both}
.is-entering .entry-circuit{animation:circuit-pass .55s ease-out both}
@keyframes gateway-close{to{transform:translateX(0)}}
@keyframes gateway-flight{0%{opacity:0;transform:scale(.7)}30%{opacity:.8}100%{opacity:0;transform:scale(1.6)}}
@media(prefers-reduced-motion:reduce){.entry-gateway{display:none}.welcome-enter:after{animation:none}}