*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:17px;line-height:1.55;overflow-x:hidden;font-feature-settings:"tnum"}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius-sm)}
.skip{position:absolute;left:-999px;top:8px;background:var(--text);color:var(--on-light);padding:8px 14px;border-radius:var(--radius-md);z-index:50}
.skip:focus{left:8px}

/* backdrop: three orbs, kit rhythm (22-28s drift, 8-12s pulse) */
.orbs{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(var(--blur-orb));opacity:.55;will-change:transform}
.orb.a{width:62vmax;height:62vmax;left:-18vmax;top:-26vmax;background:radial-gradient(circle,var(--navy),transparent 68%);animation:drift-a 26s ease-in-out infinite alternate}
.orb.b{width:44vmax;height:44vmax;right:-14vmax;top:8vmax;background:radial-gradient(circle,var(--orb-indigo),transparent 66%);opacity:.32;animation:drift-b 22s ease-in-out infinite alternate}
.orb.c{width:40vmax;height:40vmax;left:20vmax;top:110vh;background:radial-gradient(circle,var(--orb-sky),transparent 66%);opacity:.2;animation:drift-c 28s ease-in-out infinite alternate}
@keyframes drift-a{to{transform:translate(8vmax,6vmax) scale(1.08)}}
@keyframes drift-b{to{transform:translate(-9vmax,7vmax) scale(.94)}}
@keyframes drift-c{to{transform:translate(-6vmax,-10vmax) scale(1.1)}}
.paused .orb{animation-play-state:paused}

.wrap{width:min(1120px,100% - 32px);margin-inline:auto}

/* bar */
.bar{position:sticky;top:0;z-index:20;backdrop-filter:blur(var(--blur-menu));-webkit-backdrop-filter:blur(var(--blur-menu));background:linear-gradient(var(--bg),rgba(4,8,22,.6));border-bottom:1px solid var(--line)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em;text-decoration:none}
.brand svg{width:26px;height:26px}
.bar nav{display:flex;gap:6px}
.bar nav a{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:var(--radius-md);font-weight:500;font-size:15px;color:var(--muted);text-decoration:none;transition:background .15s,color .15s}
.bar nav a:hover{background:var(--hover);color:var(--text)}
.bar nav svg{width:18px;height:18px}

/* hero */
.hero{padding:clamp(40px,6vw,72px) 0 0;text-align:center}
.label{display:inline-block;font-size:11px;line-height:14px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.hero .label{padding:7px 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--accent-tint)}
h1{margin:20px auto 0;max-width:15ch;font-size:clamp(40px,7vw,80px);line-height:.98;letter-spacing:-.02em;font-weight:700;text-wrap:balance}
h1 em{font-style:normal;color:var(--accent-soft)}
.lede{margin:26px auto 0;max-width:46ch;font-size:clamp(17px,2.1vw,20px);color:var(--muted);text-wrap:pretty}

/* install panel */
.install{margin:36px auto 0;max-width:660px;text-align:left;background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--radius-panel);box-shadow:var(--shadow-panel);backdrop-filter:blur(var(--blur-glass));-webkit-backdrop-filter:blur(var(--blur-glass))}
.tabs{display:flex;gap:4px;padding:8px 10px 0;border-bottom:1px solid var(--line)}
.tab{appearance:none;background:none;border:0;color:var(--muted);font:500 14px/1 var(--font-sans);min-height:44px;padding:0 14px;border-radius:var(--radius-md) var(--radius-md) 0 0;cursor:pointer;position:relative}
.tab:hover{color:var(--text)}
.tab[aria-selected=true]{color:var(--text)}
.tab[aria-selected=true]::after{content:"";position:absolute;left:10px;right:10px;bottom:-1px;height:2px;background:var(--accent);box-shadow:var(--shadow-glow);border-radius:2px}
.cmd{position:relative;padding:18px 64px 18px 20px}
.cmd[hidden]{display:none}
.cmd pre{margin:0;font:500 15px/1.75 ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;color:var(--text);overflow-x:auto;white-space:pre}
.cmd pre i{font-style:normal;color:var(--faint);user-select:none}
.copy{position:absolute;right:12px;top:12px;width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--accent-tint);color:var(--accent-soft);cursor:pointer;transition:background .15s,border-color .15s}
.copy:hover{background:var(--selected);border-color:var(--accent-edge)}
.copy svg{width:18px;height:18px}
.copy .ok{display:none}
.copy[data-done] .ok{display:block}.copy[data-done] .cp{display:none}
.after{padding:0 20px 16px;margin:0;font-size:14px;color:var(--muted)}
.after a{color:var(--accent-soft)}
.cta{margin:22px 0 0;display:flex;justify-content:center;gap:14px;flex-wrap:wrap;font-size:15px}
.cta a{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border-radius:var(--radius-pill);border:1px solid var(--line-strong);text-decoration:none;font-weight:500;color:var(--text);transition:background .15s}
.cta a:hover{background:var(--hover)}
.cta svg{width:18px;height:18px;color:var(--accent-soft)}
.fine{margin:18px 0 0;font-size:14px;color:var(--faint)}

/* product frame */
.stage{margin:clamp(36px,5vw,56px) auto 0;perspective:1600px}
.frame{border:1px solid var(--line-strong);border-radius:var(--radius-panel);background:var(--card);box-shadow:var(--shadow-panel),0 0 120px -30px rgba(59,140,255,.45);overflow:hidden;transform-origin:50% 0;transform:rotateX(var(--tilt,0deg));will-change:transform}
.frame img{display:block;width:100%;height:auto}
.caption{margin:18px auto 0;max-width:60ch;text-align:center;font-size:14px;color:var(--muted)}

/* sections */
section{padding:clamp(72px,11vw,128px) 0 0}
h2{margin:14px 0 0;font-size:clamp(28px,4.4vw,48px);line-height:1.05;letter-spacing:-.02em;font-weight:700;max-width:20ch;text-wrap:balance}
.intro{margin:16px 0 0;max-width:56ch;color:var(--muted)}
.grid{margin-top:40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:16px}
.card{padding:24px;background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-xl);backdrop-filter:blur(var(--blur-glass));-webkit-backdrop-filter:blur(var(--blur-glass))}
.card .ic{width:42px;height:42px;display:grid;place-items:center;border-radius:var(--radius-md);background:var(--accent-tint);box-shadow:inset 0 0 0 1px var(--accent-edge);color:var(--accent-soft);margin-bottom:18px}
.card .ic svg{width:20px;height:20px}
.card h3{margin:0 0 8px;font-size:18px;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.card p{margin:0;font-size:15px;color:var(--muted)}
.card code,.intro code{font:500 .9em ui-monospace,Menlo,Consolas,monospace;color:var(--text);background:var(--accent-tint);padding:1px 6px;border-radius:var(--radius-sm)}
.split{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:900px){.split{grid-template-columns:5fr 7fr;gap:64px;align-items:start}}
.facts{display:grid;gap:0;border:1px solid var(--line);border-radius:var(--radius-xl);background:var(--glass);backdrop-filter:blur(var(--blur-glass));-webkit-backdrop-filter:blur(var(--blur-glass));overflow:hidden}
.fact{padding:22px 24px;border-top:1px solid var(--line)}
.fact:first-child{border-top:0}
.fact h3{margin:0 0 6px;font-size:17px;font-weight:700}
.fact p{margin:0;font-size:15px;color:var(--muted)}
.text-link{display:inline-flex;align-items:center;min-height:44px;margin-top:14px;color:var(--accent-soft);font-weight:500;text-decoration-color:var(--accent-edge);text-underline-offset:4px}

ol.steps{list-style:none;padding:0;margin:40px 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:16px;counter-reset:s}
ol.steps li{counter-increment:s;padding:22px 24px;border-top:1px solid var(--line-strong)}
ol.steps li::before{content:counter(s);display:block;margin-bottom:14px;font-size:13px;font-weight:700;color:var(--accent-soft);font-variant-numeric:tabular-nums}
ol.steps h3{margin:0 0 6px;font-size:17px;font-weight:700}
ol.steps p{margin:0;font-size:15px;color:var(--muted)}

footer{margin-top:clamp(80px,12vw,140px);border-top:1px solid var(--line);padding:32px 0 48px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;align-items:center}
footer nav{display:flex;flex-wrap:wrap;gap:4px 8px}
footer a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;text-decoration:none;border-radius:var(--radius-md)}
footer a:hover{background:var(--hover);color:var(--text)}

/* entrance: once, on load */
.i1{--i:1}.i2{--i:2}.i3{--i:3}.i4{--i:4}.i5{--i:5}
@media(prefers-reduced-motion:no-preference){
  .rise{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards;animation-delay:calc(var(--i,0) * 90ms)}
  @keyframes rise{to{opacity:1;transform:none}}
}
@media(prefers-reduced-motion:reduce){
  .orb.a,.orb.b,.orb.c{animation:none}
  html{scroll-behavior:auto}
  .frame{transform:none!important}
}
@media(max-width:560px){
  body{font-size:16px}
  .bar nav a span{display:none}
  .bar nav a{padding:0 12px}
  .cmd{padding:16px 58px 16px 16px}
  .cmd pre{font-size:13.5px;white-space:pre-wrap;overflow-wrap:anywhere}
  .frame{max-width:340px;margin-inline:auto}
  .after{padding:0 16px 14px}
  .tab{padding:0 10px}
  .frame{border-radius:var(--radius-xl)}
}