:root{color-scheme:light;--bg:#f6f8fb;--card:#fff;--fg:#0f172a;--muted:#5b6b82;--soft:#eef2f7;--line:#e3e8ef;--primary:#2a62d6;--primary-fg:#fff;--accent:#eef3fd;--accent-fg:#1d4bb0;--glow:rgba(42,98,214,.16);--shadow:0 24px 60px -20px rgba(15,23,42,.28);--shadow-sm:0 10px 30px rgba(15,23,42,.08)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#0b111c;--card:#111827;--fg:#e6ebf3;--muted:#97a3b6;--soft:#172033;--line:#223047;--primary:#4b82f0;--accent:#1b2438;--accent-fg:#a9c4ff;--glow:rgba(75,130,240,.22);--shadow:0 24px 60px -20px rgba(0,0,0,.7);--shadow-sm:0 10px 30px rgba(0,0,0,.4)}}
:root[data-theme=dark]{color-scheme:dark;--bg:#0b111c;--card:#111827;--fg:#e6ebf3;--muted:#97a3b6;--soft:#172033;--line:#223047;--primary:#4b82f0;--accent:#1b2438;--accent-fg:#a9c4ff;--glow:rgba(75,130,240,.22);--shadow:0 24px 60px -20px rgba(0,0,0,.7);--shadow-sm:0 10px 30px rgba(0,0,0,.4)}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg);overflow-x:hidden}
a{color:var(--primary)}a:hover{text-decoration:none}
img{max-width:100%;height:auto;display:block}
svg{flex:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.wrap{padding:0 16px}}
/* Theme-dependent pictures */
.on-dark{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .on-dark{display:block}:root:not([data-theme=light]) .on-light{display:none}}
:root[data-theme=dark] .on-dark{display:block}:root[data-theme=dark] .on-light{display:none}
.to-light{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .to-dark{display:none}:root:not([data-theme=light]) .to-light{display:inline-flex}}
:root[data-theme=dark] .to-dark{display:none}:root[data-theme=dark] .to-light{display:inline-flex}
/* Header */
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{height:64px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:650;font-size:1.05rem;letter-spacing:-.01em}
.brand img{width:30px;height:30px}
.links{display:flex;gap:4px}
.links a{padding:8px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:.92rem;font-weight:500}
.links a:hover{color:var(--fg);background:var(--soft)}
.tools{margin-left:auto;display:flex;align-items:center;gap:4px}
.ghost{display:inline-flex;align-items:center;gap:6px;padding:8px;border-radius:8px;color:var(--muted);font:inherit;font-size:.88rem;font-weight:500;text-decoration:none;cursor:pointer;background:none;border:0;user-select:none}
.ghost:hover{background:var(--soft);color:var(--fg)}.ghost svg{width:18px;height:18px}
details.pop{position:relative}
details.pop summary{list-style:none}details.pop summary::-webkit-details-marker{display:none}
details.pop[open] summary{background:var(--soft);color:var(--fg)}
.menu{position:absolute;right:0;top:calc(100% + 8px);min-width:190px;margin:0;padding:4px;list-style:none;background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow-sm);z-index:50}
.menu a{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:6px;color:var(--fg);text-decoration:none;font-size:.9rem}
.menu a:hover{background:var(--soft)}.menu svg{width:16px;height:16px;opacity:0}.menu a[aria-current] svg{opacity:1}
.mobile{display:none}
@media (max-width:900px){.links,.top .gh-label{display:none}.mobile{display:block}.top .wrap{gap:12px}}
.mobile .menu svg{opacity:1;color:var(--muted)}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:600;font-size:.98rem;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:filter .15s,background .15s,border-color .15s}
.btn svg{width:18px;height:18px}
.btn.primary{background:var(--primary);color:var(--primary-fg);box-shadow:0 8px 24px -8px var(--primary)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.outline{background:var(--card);color:var(--fg);border-color:var(--line)}
.btn.outline:hover{border-color:var(--muted)}
.actions{display:flex;flex-wrap:wrap;gap:12px}
/* Hero */
.hero{position:relative;padding:88px 0 0;text-align:center}
.hero::before{content:"";position:absolute;inset:-64px 0 auto;height:720px;background:radial-gradient(60% 55% at 50% 0%,var(--glow),transparent 70%);pointer-events:none;z-index:-1}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--line);color:var(--muted);font-size:.85rem;font-weight:500;text-decoration:none}
.pill svg{width:15px;height:15px;color:var(--primary)}
.pill:hover{color:var(--fg)}
h1{font-size:clamp(2.3rem,5.6vw,4rem);line-height:1.06;letter-spacing:-.035em;margin:24px auto 20px;max-width:900px;font-weight:750}
h1 em{font-style:normal;color:var(--primary)}
.lead{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--muted);max-width:760px;margin:0 auto}
.hero .actions{justify-content:center;margin:34px 0 16px}
.note{color:var(--muted);font-size:.86rem;margin:0}
.frame{position:relative;border:1px solid var(--line);border-radius:14px;background:var(--card);box-shadow:var(--shadow);overflow:hidden}
.frame .bar{display:flex;gap:7px;align-items:center;height:34px;padding:0 14px;border-bottom:1px solid var(--line);background:var(--soft)}
.frame .bar i{width:11px;height:11px;border-radius:50%;background:var(--line)}
.hero .frame{margin:64px auto 0;max-width:1100px}
/* Sections */
section{padding:112px 0}
@media (max-width:640px){section{padding:76px 0}.hero{padding-top:56px}}
.eyebrow{display:block;color:var(--primary);font-weight:650;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}
h2{font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.15;letter-spacing:-.025em;margin:0 0 16px;font-weight:720}
.head{max-width:720px;margin-bottom:56px}
.head.center{margin-left:auto;margin-right:auto;text-align:center}
.head p{color:var(--muted);font-size:1.08rem;margin:0}
h3{font-size:1.08rem;margin:0 0 8px;letter-spacing:-.01em}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1000px){.grid,.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.grid,.grid.four{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.ic{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:var(--accent);color:var(--accent-fg);margin-bottom:18px}
.ic svg{width:21px;height:21px}
.alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.alt .card{background:var(--bg)}
/* Tour */
.row{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px;align-items:center}
.row+.row{margin-top:96px}
.row.flip .text{order:2}
.row .text p{color:var(--muted);font-size:1.05rem;margin:0}
.ticks{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:10px}
.ticks li{display:flex;gap:10px;align-items:flex-start;color:var(--fg);font-size:.97rem}
.ticks svg{width:18px;height:18px;color:var(--primary);margin-top:4px}
@media (max-width:900px){.row{grid-template-columns:1fr;gap:32px}.row.flip .text{order:0}.row+.row{margin-top:72px}}
/* Install */
.install{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}
@media (max-width:900px){.install{grid-template-columns:1fr}}
.term{border-radius:14px;background:#0b1220;color:#e6ebf3;border:1px solid #1f2a3d;overflow:hidden;box-shadow:var(--shadow)}
.term .bar{display:flex;align-items:center;gap:7px;height:42px;padding:0 10px 0 16px;border-bottom:1px solid #1f2a3d;color:#97a3b6;font-size:.8rem}
.term .bar i{width:11px;height:11px;border-radius:50%;background:#2a3650}
.term .bar span{margin-left:8px}
.copy{margin-left:auto;display:inline-flex;align-items:center;gap:6px;background:#172033;color:#cdd6e4;border:1px solid #2a3650;border-radius:7px;padding:5px 10px;font:inherit;font-size:.8rem;cursor:pointer}
.copy:hover{background:#1f2a3d}.copy svg{width:14px;height:14px}
.term pre{margin:0;padding:22px 20px;white-space:pre-wrap;overflow-wrap:anywhere;font:.9rem/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.term .p{color:#5fd29a;user-select:none}
.term .c{color:#97a3b6}
.after{color:var(--muted);margin:20px 0 0;font-size:.95rem}
code{font:.88em ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--accent);color:var(--accent-fg);padding:2px 6px;border-radius:5px;overflow-wrap:anywhere}
.req h3{margin-bottom:14px}
.more{display:inline-flex;align-items:center;gap:6px;margin-top:24px;font-weight:600;text-decoration:none}
.more svg{width:16px;height:16px;transition:transform .15s}.more:hover svg{transform:translateX(3px)}
/* Call to action */
.cta{position:relative;overflow:hidden;text-align:center;border-radius:20px;padding:72px 24px;background:linear-gradient(135deg,#1d4bb0,#2a62d6 55%,#4b82f0);color:#fff}
.cta h2{color:#fff}.cta p{color:rgba(255,255,255,.85);max-width:620px;margin:0 auto 32px;font-size:1.08rem}
.cta .actions{justify-content:center}
.cta .btn.primary{background:#fff;color:#1d4bb0;box-shadow:none}
.cta .btn.outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.cta .btn.outline:hover{border-color:#fff}
/* Footer */
footer{border-top:1px solid var(--line);padding:64px 0 32px;font-size:.92rem}
.foot{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:40px}
@media (max-width:800px){.foot{grid-template-columns:1fr 1fr}.foot>div:first-child{grid-column:1/-1}}
.foot p{color:var(--muted);margin:14px 0 0;max-width:320px}
.foot h4{margin:0 0 14px;font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot ul a{color:var(--fg);text-decoration:none}.foot ul a:hover{color:var(--primary)}
.legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 24px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.84rem}
.legal nav{display:flex;flex-wrap:wrap;gap:6px 20px}.legal a{color:var(--muted)}
/* 404 */
.lost{text-align:center;padding:140px 0}