:root{
  --bg:#0a0e14;--bg2:#0f141c;--panel:#131a24;--panel2:#18212e;--line:#232e3d;
  --text:#e6ebf2;--muted:#9aa7b8;--dim:#6d7a8c;
  --acc:#34d399;--acc2:#22c3a6;--warm:#fbbf24;--red:#f87171;
  --r:14px;--maxw:1180px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.7 var(--font);
  background-image:radial-gradient(900px 500px at 85% -10%,rgba(52,211,153,.10),transparent 60%),
  radial-gradient(700px 400px at -10% 10%,rgba(56,189,248,.07),transparent 60%);background-attachment:fixed}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px;top:0;background:var(--acc);color:#04120c;padding:8px 12px;z-index:99}
.skip:focus{left:8px}
.topbar{background:#07090e;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted);text-align:center;padding:6px 0}

/* header */
header.site{position:sticky;top:0;z-index:50;background:rgba(10,14,20,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:18px;letter-spacing:-.02em;white-space:nowrap}
.logo:hover{text-decoration:none}
.logo b{color:var(--acc);font-weight:800}
.mark{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;font-weight:800;color:#04120c;
  background:linear-gradient(135deg,var(--acc),#38bdf8)}
nav.main{display:flex;gap:4px;margin-left:auto}
nav.main a{color:var(--muted);font-size:14.5px;font-weight:500;padding:8px 11px;border-radius:9px}
nav.main a:hover,nav.main a[aria-current]{color:var(--text);background:var(--panel);text-decoration:none}
.langs{display:flex;gap:2px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:3px}
.langs a{font-size:12.5px;font-weight:700;color:var(--muted);padding:5px 9px;border-radius:7px;text-transform:uppercase}
.langs a.on{background:var(--acc);color:#04120c}
.langs a:hover{text-decoration:none;color:var(--text)}
.langs a.on:hover{color:#04120c}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:40px;padding:10px;cursor:pointer}
.burger span{display:block;height:2px;background:var(--text);margin:4px 0;border-radius:2px;transition:.2s}

/* hero */
.hero{padding:72px 0 40px}
.hero .eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:13px;font-weight:600;color:var(--acc);
  background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25);padding:6px 12px;border-radius:999px}
.hero h1{font-size:clamp(32px,5.4vw,58px);line-height:1.08;letter-spacing:-.035em;margin:18px 0 18px;max-width:900px;font-weight:800}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--acc),#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:760px;margin:0}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:44px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.stat b{display:block;font-size:26px;letter-spacing:-.02em}
.stat span{font-size:14px;color:var(--muted);line-height:1.45;display:block;margin-top:4px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;
  padding:12px 20px;border-radius:11px;background:var(--acc);color:#04120c;border:1px solid var(--acc);white-space:nowrap}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn.ghost:hover{background:var(--panel)}

/* page head */
.phead{padding:40px 0 10px}
.crumbs{font-size:13.5px;color:var(--dim);display:flex;gap:8px;flex-wrap:wrap}
.crumbs a{color:var(--muted)}
.phead h1{font-size:clamp(28px,4.2vw,44px);line-height:1.14;letter-spacing:-.03em;margin:14px 0 14px;font-weight:800;max-width:900px}
.phead .lead{font-size:clamp(16px,1.8vw,19px);color:var(--muted);max-width:820px;margin:0}
.meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:18px;font-size:13.5px;color:var(--dim)}

/* layout */
.layout{padding:24px 16px 20px}
.content{max-width:820px}
.layout.home .content{max-width:none}
.content h2{font-size:clamp(22px,2.6vw,28px);line-height:1.25;letter-spacing:-.02em;margin:44px 0 14px;scroll-margin-top:90px}
.content h3{font-size:19px;margin:28px 0 10px}
.content p{margin:0 0 16px}
.content ul,.content ol{padding-left:22px;margin:0 0 18px}
.content li{margin:6px 0}
.content li::marker{color:var(--acc)}
.content strong{color:#fff}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:6px 0 28px}
.toc-t{font-weight:700;font-size:14px;text-transform:uppercase;letter-spacing:.06em;color:var(--dim);margin-bottom:6px}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:28px}
.toc li{font-size:15px;break-inside:avoid}
.toc a{color:var(--text)}
.note,.warnbox,.okbox{border-radius:var(--r);padding:16px 18px;margin:22px 0;border:1px solid var(--line);background:var(--panel)}
.note{border-left:3px solid #38bdf8}
.warnbox{border-left:3px solid var(--warm);background:rgba(251,191,36,.06)}
.okbox{border-left:3px solid var(--acc);background:rgba(52,211,153,.06)}
.note p:last-child,.warnbox p:last-child,.okbox p:last-child{margin:0}
.tbl{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--panel2);font-weight:700;color:var(--text)}
tr:last-child td{border-bottom:0}
td{color:#cfd7e2}
code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--panel2);padding:2px 6px;border-radius:6px}

/* home grid */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0 10px}
.tile{background:linear-gradient(180deg,var(--panel),var(--bg2));border:1px solid var(--line);border-radius:16px;padding:22px;color:var(--text);display:block;transition:.2s}
.tile:hover{border-color:rgba(52,211,153,.5);transform:translateY(-2px);text-decoration:none}
.tile .ic{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:rgba(52,211,153,.1);color:var(--acc);font-weight:800;margin-bottom:12px}
.tile b{display:block;font-size:17.5px;margin-bottom:6px}
.tile span{color:var(--muted);font-size:15px;line-height:1.55;display:block}
.section-h{font-size:clamp(24px,3vw,32px)!important;margin-top:56px!important}
.split{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:start}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px}

/* faq */
.faq{margin:28px 0}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:0 18px}
.faq summary{cursor:pointer;font-weight:600;padding:15px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--acc);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{color:#cfd7e2;margin:0 0 16px}

/* cta / eeat / related */
.cta{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:40px 0;padding:22px;border-radius:16px;
  background:linear-gradient(135deg,rgba(52,211,153,.12),rgba(56,189,248,.06));border:1px solid rgba(52,211,153,.3)}
.cta strong{display:block;font-size:18px;margin:6px 0 4px}
.cta p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.55}
.age{display:inline-block;font-size:12px;font-weight:800;color:var(--red);border:1.5px solid var(--red);border-radius:6px;padding:1px 6px;letter-spacing:.02em}
.eeat{margin:36px 0 10px;padding:20px 22px;border:1px dashed var(--line);border-radius:16px;background:rgba(19,26,36,.5)}
.eeat p{color:var(--muted);font-size:15px}
.rt{font-size:18px!important;margin:0 0 10px!important}
.src{font-size:14.5px;color:var(--muted);margin:0}
.related{padding:10px 0 40px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;color:var(--text);display:block}
.card:hover{border-color:rgba(52,211,153,.5);text-decoration:none}
.card span{font-weight:700;display:block;margin-bottom:6px}
.card small{color:var(--muted);font-size:14px;line-height:1.5;display:block}

/* footer */
.foot{border-top:1px solid var(--line);background:#07090e;padding:44px 0 24px;margin-top:20px;font-size:14.5px;color:var(--muted)}
.fgrid{display:grid;grid-template-columns:1fr 1.6fr;gap:40px}
.flinks{display:grid;grid-template-columns:repeat(3,1fr);gap:6px 18px}
.flinks a{color:var(--muted)}
.flinks a:hover{color:var(--text)}
.foot .warn{display:flex;gap:10px;align-items:flex-start}
.copy{border-top:1px solid var(--line);margin-top:28px;padding-top:18px;font-size:13px;color:var(--dim)}

/* chooser */
.chooser{min-height:100vh;display:grid;place-items:center;padding:40px 16px}
.chooser .box{max-width:760px;width:100%;text-align:center}
.chooser h1{font-size:clamp(28px,4.5vw,44px);letter-spacing:-.03em;margin:22px 0 10px}
.chooser p{color:var(--muted)}
.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.choices a{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px 16px;color:var(--text)}
.choices a:hover{border-color:var(--acc);text-decoration:none}
.choices b{display:block;font-size:20px;margin:6px 0}
.choices small{color:var(--muted)}
.flag{font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--acc)}

@media (max-width:1020px){
  nav.main{position:fixed;inset:64px 0 auto 0;flex-direction:column;background:var(--bg2);border-bottom:1px solid var(--line);
    padding:10px 16px 18px;gap:2px;transform:translateY(-10px);opacity:0;visibility:hidden;pointer-events:none;
    transition:transform .2s,opacity .2s,visibility .2s;margin:0;max-height:calc(100vh - 64px);overflow:auto}
  nav.main.open{transform:none;opacity:1;visibility:visible;pointer-events:auto}
  nav.main a{font-size:16px;padding:12px}
  .burger{display:block}
  .langs{margin-left:auto}
  .burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .burger[aria-expanded="true"] span:nth-child(2){opacity:0}
  .burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .grid3,.cards{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .split,.fgrid{grid-template-columns:1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .bar{gap:10px}
  .logo{font-size:16px}
  .logo>span:last-child{display:none}
  .hero{padding:44px 0 24px}
  .grid3,.cards,.choices{grid-template-columns:1fr}
  .toc ol{columns:1}
  .cta{flex-direction:column;align-items:flex-start}
  .cta .btn{width:100%}
  .flinks{grid-template-columns:1fr 1fr}
  .stat b{font-size:22px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}