:root{
    --bg:#0c100e;
    --surface:rgba(255,255,255,.05);
    --surface-2:rgba(255,255,255,.09);
    --border:rgba(255,255,255,.10);
    --border-strong:rgba(255,255,255,.18);
    --text:#f1f5f1;
    --muted:#9aa59c;
    --muted-2:#67716a;
    --green:#34d399;
    --green-soft:rgba(52,211,153,.16);
    --cyan:#38bdf8;
    --violet:#a78bfa;
    --amber:#fbbf24;
    --grad:linear-gradient(135deg,#6ee7b7 0%,#34d399 45%,#2dd4bf 100%);
    --grad-warm:linear-gradient(135deg,#34d399 0%,#2dd4bf 50%,#38bdf8 100%);
    --font-sans:'Inter','Noto Sans SC','Noto Sans TC','Noto Sans JP','Noto Sans KR','Noto Sans Arabic','Noto Sans Thai','Noto Sans Devanagari',system-ui,-apple-system,'Segoe UI',sans-serif;
    --font-display:'Space Grotesk','Inter','Noto Sans SC','Noto Sans TC','Noto Sans JP','Noto Sans KR',sans-serif;
    --font-mono:'JetBrains Mono',ui-monospace,monospace;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  html[dir="rtl"] body{direction:rtl;text-align:right}
  body{
    font-family:var(--font-sans);
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
    min-height:100vh;
    position:relative;
    -webkit-tap-highlight-color:transparent;
  }
  /* scroll progress bar — top of page */
  #progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:200;background:transparent;pointer-events:none}
  #progress i{display:block;height:100%;width:0;background:var(--grad-warm);box-shadow:0 0 12px rgba(52,211,153,.6)}
  /* background — brighter trio of orbs (green/cyan/violet) + faint grid */
  .bg{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden}
  .orb{position:absolute;width:640px;height:640px;border-radius:50%;background:radial-gradient(circle,rgba(52,211,153,.28),transparent 62%);top:-200px;left:50%;transform:translateX(-50%);filter:blur(70px);animation:drift 18s ease-in-out infinite alternate}
  @keyframes drift{to{transform:translateX(-50%) translate(70px,34px) scale(1.12)}}
  .bg::before{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(56,189,248,.20),transparent 62%);top:8%;right:-140px;filter:blur(80px);animation:driftB 16s ease-in-out infinite alternate}
  @keyframes driftB{to{transform:translate(-60px,40px) scale(1.15)}}
  .bg::after{content:"";position:absolute;width:440px;height:440px;border-radius:50%;background:radial-gradient(circle,rgba(167,139,250,.16),transparent 62%);bottom:-160px;left:-140px;filter:blur(90px);animation:breathe 14s ease-in-out infinite alternate}
  @keyframes breathe{to{opacity:.7;transform:scale(1.18)}}
  .grid{position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 20%,transparent 75%);
    -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 20%,transparent 75%);
    animation:shift 40s linear infinite}
  @keyframes shift{to{background-position:64px 64px,64px 64px}}

  .wrap{max-width:820px;margin:0 auto;padding:0 24px}

  /* nav — minimal glass */
  nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:rgba(12,16,14,.72);border-bottom:1px solid transparent;transition:.3s}
  nav.scrolled{border-color:var(--border);box-shadow:0 8px 30px rgba(0,0,0,.25)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
  .brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-family:var(--font-display);font-weight:600;font-size:16px;letter-spacing:-.01em}
  .brand .mark{width:26px;height:26px;border-radius:6px;display:block;object-fit:contain}
  .nav-right{display:flex;align-items:center;gap:6px}

  /* language switcher — dropdown */
  .lang-dd{position:relative}
  .lang{font-family:var(--font-mono);font-size:12px;color:var(--muted);border:1px solid var(--border);background:transparent;padding:7px 11px;border-radius:9px;cursor:pointer;transition:.2s;display:inline-flex;align-items:center;gap:6px;line-height:1}
  .lang:hover{color:var(--text);border-color:var(--border-strong)}
  .lang .caret{width:9px;height:9px;stroke:currentColor;fill:none;stroke-width:1.6;opacity:.7;transition:transform .2s}
  .lang-dd.open .lang{color:var(--text);border-color:var(--border-strong)}
  .lang-dd.open .caret{transform:rotate(180deg)}
  .lang-menu{position:absolute;top:calc(100% + 6px);right:0;min-width:182px;max-width:min(300px,calc(100vw - 32px));max-height:70vh;overflow-y:auto;background:rgba(16,22,18,.97);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:12px;padding:6px;box-shadow:0 16px 48px rgba(0,0,0,.55);display:none;z-index:60;animation:menuIn .18s ease-out}
  @keyframes menuIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
  html[dir="rtl"] .lang-menu{right:auto;left:0}
  .lang-dd.open .lang-menu{display:block}
  .lang-item{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;padding:8px 12px;border:0;background:transparent;color:var(--muted);font-family:inherit;font-size:12.5px;border-radius:7px;cursor:pointer;transition:.15s;text-align:left;text-decoration:none}
  html[dir="rtl"] .lang-item{text-align:right}
  .lang-item:hover{background:var(--surface-2);color:var(--text)}
  .lang-item.active{color:var(--green);background:var(--green-soft)}
  .lang-item .code{font-family:var(--font-mono);font-size:10.5px;color:var(--muted-2);letter-spacing:.04em}
  .lang-item.active .code{color:var(--green);opacity:.85}
  .lang-item .beta{font-family:var(--font-mono);font-size:9.5px;color:var(--muted-2);border:1px solid var(--border);border-radius:3px;padding:1px 4px;margin-left:6px;text-transform:uppercase}
  html[dir="rtl"] .lang-item .beta{margin-left:0;margin-right:6px}

  .gh{display:grid;place-items:center;width:36px;height:36px;color:var(--muted);border:1px solid var(--border);border-radius:9px;transition:.2s}
  .gh:hover{color:var(--green);border-color:var(--green);transform:translateY(-1px)}
  .gh svg{width:16px;height:16px}

  /* hero — compact, centered */
  .hero{padding:108px 0 64px;text-align:center}
  .pill{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;color:var(--muted);padding:6px 14px;border:1px solid var(--border);border-radius:100px;background:var(--surface);margin-bottom:30px}
  .pill .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 2.4s ease-in-out infinite}
  @keyframes pulse{50%{opacity:.35;transform:scale(.6)}}
  h1{font-family:var(--font-display);font-weight:700;font-size:clamp(56px,13vw,124px);line-height:.92;letter-spacing:-.04em;margin-bottom:22px}
  h1 .grad{background:var(--grad);background-size:220% 220%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shimmer 7s ease-in-out infinite alternate}
  @keyframes shimmer{to{background-position:100% 100%}}
  h1 .dim{color:var(--muted-2);font-weight:500}
  .tagline{font-size:clamp(16px,2.1vw,19px);color:var(--muted);max-width:580px;margin:0 auto 38px}
  .tagline-title{white-space:nowrap}
  @media(max-width:680px){.tagline-title{white-space:normal;word-break:break-word}}
  .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
  .btn{display:inline-flex;align-items:center;gap:9px;font-size:14px;font-weight:500;text-decoration:none;padding:14px 24px;border-radius:12px;transition:.25s;border:1px solid transparent;cursor:pointer;font-family:inherit;position:relative;overflow:hidden}
  .btn-primary{color:#06120c;background:var(--grad);box-shadow:0 8px 30px rgba(52,211,153,.28)}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 44px rgba(52,211,153,.42);filter:saturate(1.15)}
  .btn-primary::after{content:"";position:absolute;top:0;left:-80%;width:45%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);transform:skewX(-20deg);transition:left .55s ease}
  .btn-primary:hover::after{left:130%}
  .btn:active{transform:translateY(0)}
  .btn-ghost{color:var(--text);background:var(--surface);border-color:var(--border)}
  .btn-ghost:hover{background:var(--surface-2);border-color:var(--border-strong);transform:translateY(-2px)}
  .btn svg{width:15px;height:15px}

  /* features — 6 items, 3 cols on desktop, 2 cols tablet, 1 col narrow mobile */
  .features{padding:56px 0}
  .feat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
  .feat{padding:28px 16px;background:var(--surface);border:1px solid var(--border);border-radius:16px;text-align:center;transition:transform .25s,background .25s,border-color .25s,box-shadow .25s}
  .feat:hover{background:var(--green-soft);border-color:rgba(52,211,153,.3);transform:translateY(-4px);box-shadow:0 16px 40px rgba(16,185,129,.16)}
  .feat .ico{width:34px;height:34px;margin:0 auto 12px;color:var(--green);transition:transform .3s}
  .feat:hover .ico{transform:scale(1.15) rotate(-4deg)}
  .feat .ico svg{width:100%;height:100%}
  .feat h3{font-family:var(--font-display);font-size:14px;font-weight:600;margin-bottom:4px}
  .feat p{font-size:12px;color:var(--muted)}
  @media(max-width:860px){.feat-row{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:560px){
    .feat-row{grid-template-columns:repeat(2,1fr);gap:8px}
    .feat{padding:22px 10px}
    .feat .ico{width:28px;height:28px;margin-bottom:10px}
    .feat h3{font-size:13px;line-height:1.35}
    .feat p{font-size:11px;line-height:1.5}
  }
  @media(max-width:360px){.feat-row{grid-template-columns:1fr}}

  /* about — short prose, refined */
  .about{padding:62px 0 32px}
  .about-head{text-align:center;margin-bottom:36px}
  .about-head .kicker{font-family:var(--font-mono);font-size:11px;color:var(--green);text-transform:uppercase;letter-spacing:.16em;margin-bottom:9px}
  .about-head h2{font-family:var(--font-display);font-size:26px;font-weight:600;letter-spacing:-.02em}
  .about-body{max-width:620px;margin:0 auto}
  .about-body p{font-size:15px;color:var(--muted);margin-bottom:18px}
  .about-body p:last-child{margin-bottom:0}
  .about-body em{color:var(--green);font-style:normal;font-weight:500}

  /* whatsnew — single column, numbered list, changelog-style */
  .whatsnew{padding:62px 0 32px;border-top:1px solid var(--border);margin-top:30px}
  .whatsnew-head{text-align:center;margin-bottom:32px}
  .whatsnew-head .kicker{font-family:var(--font-mono);font-size:11px;color:var(--green);text-transform:uppercase;letter-spacing:.16em;margin-bottom:9px}
  .whatsnew-head h2{font-family:var(--font-display);font-size:26px;font-weight:600;letter-spacing:-.02em;margin-bottom:6px;background:var(--grad-warm);-webkit-background-clip:text;background-clip:text;color:transparent}
  .whatsnew-head .sub{font-family:var(--font-mono);font-size:12px;color:var(--muted-2)}
  .whatsnew-list{max-width:660px;margin:0 auto;display:grid;gap:18px}
  .wn-item{display:grid;grid-template-columns:38px 1fr;gap:14px;align-items:start;padding:16px 18px;border:1px solid var(--border);border-radius:14px;background:var(--surface);transition:transform .2s,border-color .2s,background .2s,box-shadow .2s}
  .wn-item:hover{border-color:rgba(52,211,153,.35);background:var(--surface-2);transform:translateY(-3px);box-shadow:0 14px 38px rgba(0,0,0,.35),0 0 0 1px rgba(52,211,153,.1)}
  html[dir="rtl"] .wn-num{direction:ltr;unicode-bidi:isolate;text-align:start}
  .wn-num{font-family:var(--font-mono);font-size:12px;color:var(--green);font-weight:600;padding-top:2px;letter-spacing:.04em}
  .wn-text h3{font-family:var(--font-display);font-size:14px;font-weight:600;margin-bottom:4px;letter-spacing:-.01em;text-align:start}
  .wn-text p{font-size:13px;color:var(--muted);line-height:1.55;text-align:start}
  .wn-cta{text-align:center;margin-top:26px}
  .wn-cta a{font-family:var(--font-mono);font-size:12px;color:var(--muted);text-decoration:none;border-bottom:1px solid var(--border);padding-bottom:2px;transition:.2s}
  .wn-cta a:hover{color:var(--green);border-color:var(--green)}

  /* footer — single line */
  footer{padding:42px 0 52px;text-align:center;border-top:1px solid var(--border);margin-top:30px}
  footer p{font-family:var(--font-mono);font-size:12px;color:var(--muted-2)}
  footer p a{color:var(--muted);text-decoration:none;transition:.2s}
  footer p a:hover{color:var(--green)}

  .reveal{opacity:0;transform:translateY(20px);transition:opacity .65s cubic-bezier(.2,.7,.2,1),transform .65s cubic-bezier(.2,.7,.2,1)}
  .reveal.in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}#progress{display:none}}
  ::selection{background:rgba(52,211,153,.3);color:#fff}