:root{
  --bg:#F2F4F3; --surface:#FFFFFF; --ink:#0E1A24; --muted:#5A6873; --line:#D9DFDE;
  --accent:#0A7480; --accent-ink:#FFFFFF; --accent-soft:#DCEFEF;
  --gold:#A87A1F; --gold-soft:#F4EAD3;
  --band:#0E1A24; --band-ink:#E8EEF0; --band-muted:#94A3AE;
  --display:"Unbounded","Segoe UI",system-ui,sans-serif;
  --body:"Onest","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0D151C; --surface:#141E27; --ink:#E6ECEF; --muted:#98A6B0; --line:#25323D;
    --accent:#3FB8C3; --accent-ink:#06181B; --accent-soft:#12323A;
    --gold:#DDB35A; --gold-soft:#33291A;
    --band:#08222A; --band-ink:#E6ECEF; --band-muted:#8FA6AE;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0D151C; --surface:#141E27; --ink:#E6ECEF; --muted:#98A6B0; --line:#25323D;
  --accent:#3FB8C3; --accent-ink:#06181B; --accent-soft:#12323A;
  --gold:#DDB35A; --gold-soft:#33291A;
  --band:#08222A; --band-ink:#E6ECEF; --band-muted:#8FA6AE;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:16px/1.6 var(--body)}
a{color:inherit}
.gutter{padding-inline:16px}
.w{max-width:1120px;margin:0 auto}
h1,h2,h3{text-wrap:balance;margin:0}
h2{font:700 clamp(24px,3.4vw,34px)/1.15 var(--display);letter-spacing:-.015em}
.kicker{font:500 12px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.muted{color:var(--muted)}
.demo{display:inline-block;font:500 11px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--gold);background:var(--gold-soft);padding:5px 8px;border-radius:4px}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 15px/1 var(--body);padding:14px 20px;border-radius:8px;text-decoration:none;border:1.5px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-ghost{border-color:var(--line);background:var(--surface)}
.btn:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .w{display:flex;align-items:center;gap:24px;height:64px}
.logo{font:700 17px/1 var(--display);letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo i{width:22px;height:22px;border-radius:50%;background:conic-gradient(from 200deg,var(--accent),var(--gold),var(--accent));display:block}
.nav{display:flex;gap:22px;font-size:15px;margin-left:12px}
.nav a{text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.top-right{margin-left:auto;display:flex;align-items:center;gap:14px;font-size:14px}
.lang{font:500 12px var(--mono);color:var(--muted);white-space:nowrap}
.top .btn{padding:10px 16px;font-size:14px}
@media (max-width:860px){.nav{display:none}}
@media (max-width:480px){.lang{display:none}}

/* hero */
.hero{padding-block:64px 40px}
.hero .w{display:grid;grid-template-columns:1.25fr .9fr;gap:48px;align-items:start}
.hero h1{font:700 clamp(32px,5.2vw,58px)/1.04 var(--display);letter-spacing:-.03em;margin:16px 0 20px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{font-size:19px;color:var(--muted);max-width:52ch;margin:0 0 28px}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-facts{display:flex;flex-wrap:wrap;gap:28px;margin-top:36px;font-size:14px;color:var(--muted)}
.hero-facts b{display:block;font:600 22px/1.2 var(--body);color:var(--ink);font-variant-numeric:tabular-nums}
.desk{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.desk-head{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line);font:500 12px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.desk-item{display:grid;grid-template-columns:64px 1fr;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);text-decoration:none}
.desk-item:last-child{border-bottom:0}
.desk-item:hover{background:var(--accent-soft)}
.tk{font:500 13px/1.3 var(--mono);color:var(--accent)}
.desk-item span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
@media (max-width:900px){.hero .w{grid-template-columns:1fr}}

/* ticker tape */
.tape{border-block:1px solid var(--line);background:var(--surface);overflow:hidden;white-space:nowrap}
.tape-track{display:inline-flex;gap:40px;padding:12px 0;font:500 13px var(--mono);color:var(--muted);animation:tape 60s linear infinite}
.tape-track b{color:var(--ink);font-weight:500;margin-right:8px}
@keyframes tape{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.tape-track{animation:none}}

section.s{padding-block:72px}
.s-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:16px;margin-bottom:32px}
.s-head p{max-width:52ch;margin:10px 0 0;color:var(--muted)}

/* start */
.start{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.start > div{background:var(--surface);padding:28px 24px;display:flex;flex-direction:column;gap:10px}
.start h3{font:600 20px/1.25 var(--body)}
.start p{margin:0;color:var(--muted);font-size:15px}
.start .glyph{font:500 13px var(--mono);color:var(--gold)}
@media (max-width:820px){.start{grid-template-columns:1fr}}

/* materials */
.mats{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.mat{display:grid;grid-template-columns:72px 1fr auto;gap:14px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--line);text-decoration:none}
.mat h3{font:500 16.5px/1.4 var(--body)}
.mat time{font:400 12.5px var(--mono);color:var(--muted);white-space:nowrap}
.tag{font:500 11px/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--muted);display:block;margin-top:6px}
@media (max-width:820px){.mats{grid-template-columns:1fr}}
@media (max-width:480px){.mat{grid-template-columns:60px 1fr}.mat time{grid-column:2}}


/* catalog */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.filters button{font:500 14px/1 var(--body);padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.filters button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.filters .count{font:400 12px var(--mono);opacity:.6;margin-left:6px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;cursor:pointer;text-align:left;padding:0;font:inherit;color:inherit}
.card:hover .cover svg{transform:scale(1.03)}
.card:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.cover{aspect-ratio:16/10;max-width:100%;overflow:hidden;position:relative}
.cover svg{display:block;width:100%;height:100%;transition:transform .4s ease}
.cover .chip{position:absolute;left:12px;top:12px;font:500 11px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;background:rgba(255,255,255,.92);color:#0E1A24;padding:6px 8px;border-radius:4px}
.cover .free{left:auto;right:12px;background:#F2C14E}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h3{font:600 19px/1.3 var(--body)}
.card p{margin:0;color:var(--muted);font-size:14.5px;flex:1}
.facts{display:flex;flex-wrap:wrap;gap:6px 14px;font:400 12.5px var(--mono);color:var(--muted)}
.card .price{display:flex;align-items:baseline;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:14px;margin-top:4px}
.card .price b{font:700 21px/1 var(--body);white-space:nowrap;font-variant-numeric:tabular-nums}
.card .price span{font-size:12.5px;color:var(--muted);text-align:right}
@media (prefers-reduced-motion:reduce){.cover svg{transition:none}}

/* product sheet */
dialog.sheet{border:0;padding:0;max-width:880px;width:calc(100% - 32px);max-height:calc(100% - 32px);border-radius:16px;background:var(--surface);color:var(--ink)}
dialog.sheet::backdrop{background:rgba(8,16,22,.6)}
.sheet-cover{aspect-ratio:16/6;max-width:100%;overflow:hidden;position:relative}
.sheet-cover svg{width:100%;height:100%;display:block}
.sheet-close{position:absolute;right:12px;top:12px;width:40px;height:40px;border-radius:50%;border:0;background:rgba(255,255,255,.92);color:#0E1A24;font:400 22px/1 var(--body);cursor:pointer}
.sheet-in{padding:28px clamp(18px,4vw,40px) 36px;display:grid;gap:24px}
.sheet-head h2{margin:8px 0 10px}
.sheet-head p{margin:0;color:var(--muted);font-size:17px;max-width:60ch}
.buy{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;padding:18px 20px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.buy b{font:700 28px/1 var(--display);font-variant-numeric:tabular-nums}
.buy .muted{font-size:14px}
.buy .btn{margin-left:auto}
.blocks{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.blk{border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.blk h3{font:600 16px/1.3 var(--body);margin-bottom:10px;display:flex;justify-content:space-between;gap:8px;align-items:center}
.blk ul{margin:0;padding-left:18px;color:var(--muted);font-size:14.5px}
.blk.wide{grid-column:1/-1}
.prog{list-style:none;padding:0;margin:0;counter-reset:m;display:grid;gap:0}
.prog li{counter-increment:m;display:grid;grid-template-columns:34px 1fr auto;gap:12px;align-items:baseline;padding:12px 0;border-top:1px solid var(--line)}
.prog li:first-child{border-top:0;padding-top:4px}
.prog li::before{content:counter(m,decimal-leading-zero);font:500 13px var(--mono);color:var(--accent)}
.prog b{display:block;font-weight:600;font-size:15.5px}
.prog span{display:block;color:var(--muted);font-size:14px}
.prog em{font:400 12.5px var(--mono);font-style:normal;color:var(--muted);white-space:nowrap}
.blk h3 .mono{font:400 12.5px var(--mono);font-weight:400}
.qa details{border-top:1px solid var(--line);padding:12px 0}
.qa details:first-child{border-top:0;padding-top:2px}
.qa summary{cursor:pointer;font-weight:600;font-size:15px}
.qa p{margin:6px 0 0;color:var(--muted);font-size:14.5px}
@media (max-width:640px){.blocks{grid-template-columns:1fr}.buy .btn{margin-left:0}}

/* about */
.about{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.sources{display:grid;gap:0;border-top:1px solid var(--line)}
.sources div{display:grid;grid-template-columns:130px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
.sources b{font:500 12px/1.6 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
@media (max-width:760px){.about{grid-template-columns:1fr}.sources div{grid-template-columns:1fr;gap:2px}}
/* principles band */
.band{background:var(--band);color:var(--band-ink)}
.band .kicker{color:var(--band-muted)}
.rules{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:28px}
.rules h3{font:600 17px/1.3 var(--body);margin-bottom:8px}
.rules p{margin:0;color:var(--band-muted);font-size:14.5px}
@media (max-width:900px){.rules{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.rules{grid-template-columns:1fr}}

/* faq */
.faq{display:grid;gap:0;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font:600 17px/1.4 var(--body);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";font:400 22px/1 var(--mono);color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.faq p{margin:10px 0 0;color:var(--muted);max-width:70ch}

/* footer */
footer{border-top:1px solid var(--line);padding-block:48px 40px;font-size:14px}
.foot{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px}
.foot h4{font:500 12px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.foot ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.foot a{text-decoration:none;color:var(--ink)}
.foot a:hover{color:var(--accent)}
.req{color:var(--muted);line-height:1.7}
.req b{color:var(--ink);font-weight:600}
.pay{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.pay span{font:600 12px/1 var(--body);border:1px solid var(--line);background:var(--surface);border-radius:6px;padding:8px 10px;color:var(--muted);display:inline-flex;align-items:center;min-height:38px}
.pay .mark{background:#FFFFFF;border-color:#D9DFDE;padding:6px 12px}
.pay .mark img,.buy-marks img{display:block;height:auto}
.buy-marks{display:flex;gap:8px;align-items:center;background:#FFFFFF;border-radius:6px;padding:6px 10px;border:1px solid #D9DFDE}
.risk{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;max-width:90ch}
@media (max-width:820px){.foot{grid-template-columns:1fr}}