:root{
  --bg:#f8fafc;
  --card:#ffffff;
  --border:#e2e8f0;
  --text:#1e293b;
  --muted:#64748b;
  --accent:#2563eb;
  --accent-fg:#ffffff;
  --running:#22c55e;
  --danger:#dc2626;
  --radius:8px;
  --shadow:0 1px 3px rgba(0,0,0,.08);
}
html.dark{
  --bg:#0f172a;
  --card:#1e293b;
  --border:#334155;
  --text:#f1f5f9;
  --muted:#94a3b8;
  --accent:#3b82f6;
  --accent-fg:#ffffff;
  --running:#22c55e;
  --danger:#f87171;
  color-scheme:dark;
}
html.dark body{background:var(--bg)}
html.dark nav{background:rgba(15,23,42,.94)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:system-ui,-apple-system,sans-serif;
  font-size:16.5px;line-height:1.6;
  min-width:750px;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 32px}

.eyebrow{
  font-size:.7rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.08em;color:var(--muted);margin:0 0 18px;
}
h2{
  font-weight:700;font-size:clamp(26px,3.4vw,38px);line-height:1.16;
  letter-spacing:-.01em;margin:0 0 16px;
}
.lede{font-size:18px;color:var(--muted);max-width:56ch;margin:0}

/* ── NAV ── */

nav{border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(248,250,252,.94);backdrop-filter:blur(8px);z-index:50}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:.45rem;font-weight:700;font-size:16px;letter-spacing:.03em}
.brand-icon{width:28px;height:28px;display:flex;align-items:center;justify-content:center}
.brand-icon img{width:28px;height:28px;display:block}
.nav-links{display:flex;gap:26px;align-items:center;font-size:14.5px}
.nav-links a{color:var(--muted);text-decoration:none}
.nav-links a:hover{color:var(--text)}
.theme-btn{background:none;border:none;cursor:pointer;padding:5px 6px;border-radius:6px;color:var(--muted);display:inline-flex;align-items:center;transition:color .15s,background .15s}
.theme-btn:hover{color:var(--text);background:rgba(100,116,139,.1)}
html.dark .theme-btn{color:var(--accent)}
html.dark .theme-btn:hover{color:#60a5fa;background:rgba(59,130,246,.1)}
html.dark .d-box-accent{fill:rgba(59,130,246,.1)}

/* ── BUTTONS ── */

.btn{
  display:inline-block;background:var(--accent);color:var(--accent-fg);
  padding:10px 20px;border-radius:var(--radius);text-decoration:none;
  font-weight:600;font-size:14.5px;border:1px solid var(--accent);
  box-shadow:var(--shadow);transition:filter .15s,transform .15s;
}
.btn:hover{filter:brightness(.92);transform:translateY(-1px)}
.btn-ghost{background:var(--card);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{filter:none;border-color:var(--accent);color:var(--accent)}
.nav-links a.btn{color:var(--accent-fg)}
.nav-links a.btn-ghost{color:var(--text)}

/* ── HERO ── */

.hero{padding:80px 0;overflow:hidden}
.hero-body{max-width:1500px;margin:0 auto;padding:0 32px;display:flex;align-items:flex-start;gap:40px;flex-wrap:wrap}
.hero-text{flex:1;min-width:320px}
.hero-visual{flex:1;min-width:900px;position:relative;overflow:hidden;height:420px;border-radius:12px;transform:perspective(1500px) rotateY(-12deg) rotateX(4deg);transform-origin:left center}
.hero-visual::before{content:'';position:absolute;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(100,116,139,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(100,116,139,.06) 1px,transparent 1px);background-size:38px 38px;-webkit-mask-image:radial-gradient(circle at 50% 40%,#000 26%,transparent 74%);mask-image:radial-gradient(circle at 50% 40%,#000 26%,transparent 74%)}
.hero-frame-wrap{position:absolute;inset:0;z-index:1}
.hero-app-frame{position:absolute;top:0;left:calc(50% - 434px);width:1240px;height:900px;border:none;display:block;transform:scale(0.7);transform-origin:top left}
h1{
  font-weight:700;font-size:clamp(34px,5.2vw,56px);line-height:1.1;
  letter-spacing:-.02em;margin:0 0 24px
}
h1 em{font-style:normal;color:var(--accent)}
.hero-sub{font-size:19px;color:var(--muted);margin:0 0 32px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero-note{font-size:13px;color:var(--muted);margin-top:18px}

/* ── STANDOFF ── */

.standoff{margin-top:56px;padding-top:40px;border-top:1px solid var(--border)}
.so-grid{display:grid;grid-template-columns:1fr;gap:20px}
.so-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 24px 26px;box-shadow:var(--shadow);
}
.so-card.bad{border-left:3px solid var(--danger)}
.so-card.good{border-left:3px solid var(--running)}
.so-tag{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}
.so-card.bad .so-tag{color:var(--danger)}
.so-card.good .so-tag{color:var(--running)}
.so-card h3{font-weight:700;font-size:18px;letter-spacing:-.01em;margin:0 0 8px;line-height:1.35}
.so-card p{margin:0;font-size:15px;color:var(--muted)}

/* ── DIAGRAM ── */

.diagram-frame{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;width:100%}
.diagram svg{width:100%;height:auto;display:block}
.d-box{fill:var(--bg);stroke:var(--border);stroke-width:1}
.d-box-accent{fill:#eff4ff;stroke:var(--accent);stroke-width:1.5}
.d-label{font-weight:700;font-size:14.5px;fill:var(--text)}
.d-sub{font-size:12px;fill:var(--muted)}
.d-zone{font-size:10.5px;font-weight:700;letter-spacing:.1em;fill:var(--muted)}
.d-flow{stroke:var(--border);stroke-width:1.5;fill:none}
.d-bound{stroke:var(--danger);stroke-width:1.5;stroke-dasharray:5 5;opacity:.5}
.pkt{fill:var(--accent)}
.pkt-label{font-size:11.5px;fill:var(--accent);font-weight:600}
.cred{fill:var(--danger)}
.cred-label{font-size:11.5px;fill:var(--danger);font-weight:600}
.kill-dot{fill:var(--danger)}
.kill-label{font-size:10px;font-weight:700;letter-spacing:.06em;fill:var(--muted)}

@keyframes ride1{0%{opacity:0;transform:translateX(0)}3%{opacity:1}20%{opacity:1;transform:translateX(150px)}24%,100%{opacity:0;transform:translateX(150px)}}
@keyframes ride2{0%,22%{opacity:0;transform:translateX(0)}25%{opacity:1}40%{opacity:1;transform:translateX(160px)}44%,100%{opacity:0;transform:translateX(160px)}}
@keyframes ret1{0%,44%{opacity:0;transform:translateX(0)}47%{opacity:1}62%{opacity:1;transform:translateX(-134px)}66%,100%{opacity:0;transform:translateX(-134px)}}
@keyframes ret2{0%,64%{opacity:0;transform:translateX(0)}67%{opacity:1}82%{opacity:1;transform:translateX(-134px)}86%,100%{opacity:0;transform:translateX(-134px)}}
@keyframes blocked{0%,64%{opacity:0;transform:translateX(0)}68%{opacity:1;transform:translateX(0)}78%{opacity:1;transform:translateX(-84px)}81%{transform:translateX(-76px)}84%{transform:translateX(-84px)}87%{transform:translateX(-78px)}95%{opacity:0;transform:translateX(-80px)}100%{opacity:0;transform:translateX(0)}}
@keyframes stopflash{0%,76%{opacity:0}80%,93%{opacity:1}97%,100%{opacity:0}}
.g-ride1{animation:ride1 9s cubic-bezier(.5,0,.5,1) infinite}
.g-ride2{animation:ride2 9s cubic-bezier(.5,0,.5,1) infinite}
.g-ret1{animation:ret1 9s cubic-bezier(.5,0,.5,1) infinite}
.g-ret2{animation:ret2 9s cubic-bezier(.5,0,.5,1) infinite}
.g-blocked{animation:blocked 9s ease-in-out infinite}
.g-stop{animation:stopflash 9s ease-in-out infinite}

/* ── ASK / AI SECTION ── */

.ask{padding:80px 0;border-top:1px solid var(--border)}
.ask h2{max-width:22ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 22px 24px}
.card .q{font-weight:700;font-size:17px;color:var(--text);line-height:1.35;margin:0 0 16px}
.card .a{margin:0;font-size:14.5px;color:var(--muted);line-height:1.6}
.card .a b{color:var(--accent);font-weight:600}
.ask-foot{margin-top:30px;font-size:14.5px;color:var(--muted);max-width:64ch}

/* ── CONTROL / PRIVACY ── */

.control{padding:80px 0;border-top:1px solid var(--border)}
.p-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
.p-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px 28px;box-shadow:var(--shadow)}
.p-tag{font-size:.68rem;font-weight:700;letter-spacing:.08em;color:var(--danger);margin-bottom:14px}
.p-item h3{font-weight:700;font-size:18.5px;letter-spacing:-.01em;margin:0 0 10px;line-height:1.3}
.p-item p{margin:0;font-size:14.5px;color:var(--muted)}

/* ── STEPS ── */

.steps{padding:80px 0;border-top:1px solid var(--border)}
.s-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:44px}
.s-item{border-top:2px solid var(--accent);padding-top:20px}
.s-num{font-size:1.6rem;font-weight:800;letter-spacing:0;color:var(--accent);margin-bottom:10px;line-height:1}
.s-item h3{font-weight:700;font-size:18px;letter-spacing:-.01em;margin:0 0 8px}
.s-item p{margin:0;font-size:14.5px;color:var(--muted)}

/* ── HOW IT WORKS ── */

.howto{padding:80px 0;border-top:1px solid var(--border)}

.howto-tabs{
  display:flex;align-items:center;gap:0;
  border-bottom:1px solid var(--border);
  margin-top:36px;
}
.howto-tab{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 22px 11px;
  border:none;border-bottom:2px solid transparent;margin-bottom:-1px;
  background:none;font-family:inherit;font-size:14.5px;font-weight:600;
  color:var(--muted);cursor:pointer;white-space:nowrap;
  transition:color .15s,border-color .15s;
}
.howto-tab:first-child{padding-left:0}
.howto-tab:not([disabled]):hover{color:var(--text)}
.howto-tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.howto-tab[disabled]{opacity:.5;cursor:default}
.ht-num{font-size:.65rem;font-weight:700;letter-spacing:.08em}
.ht-soon{
  font-size:11px;font-weight:600;letter-spacing:.03em;
  background:var(--bg);border:1px solid var(--border);
  border-radius:4px;padding:1px 7px;color:var(--muted);
}

.howto-player{margin-top:24px;position:relative}
.howto-frame{width:100%;height:630px;border:none;border-radius:var(--radius);display:block}
.howto-spinner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg);border-radius:var(--radius);opacity:0;visibility:hidden;transition:opacity .2s ease;z-index:2}
.howto-player.loading .howto-spinner{opacity:1;visibility:visible}
.spinner-ring{width:38px;height:38px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:howto-spin .7s linear infinite}
@keyframes howto-spin{to{transform:rotate(360deg)}}

/* ── WORKS WITH ── */

.works{padding:80px 0;border-top:1px solid var(--border)}
.w-list{list-style:none;padding:0;margin:40px 0 0;display:grid;grid-template-columns:repeat(2,1fr);gap:0 44px}
.w-list li{padding:14px 0;border-bottom:1px solid var(--border);font-size:15.5px;display:flex;justify-content:space-between;gap:18px;align-items:baseline}
.w-note{font-size:13.5px;color:var(--muted);text-align:right}
.w-foot{margin:34px 0 0;padding:18px 22px;background:var(--bg);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--radius);font-size:14.5px;color:var(--muted)}
.w-foot b{color:var(--text);font-weight:600}

/* ── CLOSE / CTA ── */

.close{padding:80px 0;border-top:1px solid var(--border);text-align:center}
.close h2{max-width:22ch;margin-left:auto;margin-right:auto}
.close .lede{margin:0 auto 32px}
.close-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.req{margin-top:28px;font-size:13px;color:var(--muted)}

/* ── FOOTER ── */

footer{border-top:1px solid var(--border);padding:30px 0 42px}
.f-in{display:flex;justify-content:space-between;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.f-in a{color:var(--muted);text-decoration:none}
.f-in a:hover{color:var(--text)}

/* ── RESPONSIVE ── */

@media(max-width:1323px){
  .hero-visual{transform:none;min-width:818px;height:400px}
  .hero-visual::before{display:none}
  .hero-frame-wrap{top:-53px}
}
@media(max-width:900px){
  .cards,.p-grid,.s-grid,.w-list,.so-grid{grid-template-columns:1fr}
  .nav-links a:not(.btn){display:none}
  .wrap{padding:0 22px}
  .hero{padding:52px 0}
  .hero-body{padding:0 22px}
  .w-note{text-align:left}
  .howto-tabs{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:1px}
  .howto-tab{flex-shrink:0}
  .standoff{margin-top:32px;padding-top:24px}
  .f-in{flex-direction:column;gap:10px}
}
@media(prefers-reduced-motion:reduce){
  .g-ride1,.g-ride2,.g-ret1,.g-ret2,.g-blocked,.g-stop{animation:none}
  .g-ride1,.g-ride2,.g-stop{opacity:1}
  .g-ret1,.g-ret2{opacity:1;transform:translateX(-134px)}
  .g-blocked{opacity:1;transform:translateX(-80px)}
  html{scroll-behavior:auto}
}
a:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}