:root{
    --paper:#ffffff;
    --paper-soft:#f6f6f3;
    --ink:#17181c;
    --ink-soft:#55575f;
    --ink-faint:#8a8c93;
    --line:#e3e2dd;
    --pin:#d6401f;
    --pin-dark:#a82e12;
    --pin-tint:#fbebe6;
    --key-bg:#202226;
    --key-edge:#0f1013;
    --focus:#1857c9;
    --radius:3px;
    --sans:'IBM Plex Sans', system-ui, sans-serif;
    --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--sans);
    color:var(--ink);
    background:var(--paper);
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  img,svg{max-width:100%;display:block;}
  a{color:inherit;}
  :focus-visible{outline:2px solid var(--focus); outline-offset:2px;}

  .wrap{
    max-width:1080px;
    margin:0 auto;
    padding:0 28px;
  }
  .wrap-wide{ max-width:1400px; }
  /* sections that apply .wrap directly to <section> need their vertical
     padding restored — .wrap's shorthand padding zeroes it out otherwise */
  section.wrap{ padding-top:37px; padding-bottom:37px; }
  section.hero.wrap{ padding-top:38px; padding-bottom:32px; }

  h1,h2,h3{
    font-weight:600;
    line-height:1.15;
    margin:0;
    letter-spacing:-0.01em;
  }
  h2{font-size:clamp(26px,3.4vw,36px);}
  h3{font-size:19px; font-weight:600;}
  p{margin:0;}
  .lede{
    font-size:18px;
    color:var(--ink-soft);
    max-width:62ch;
  }
  .measure{max-width:62ch;}
  code, .kbd, .path{
    font-family:var(--mono);
    overflow-wrap:anywhere;
    word-break:break-word;
  }

  /* ---------- header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(255,255,255,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    height:64px; gap:24px;
  }
  .brand{
    display:flex; align-items:center; gap:9px;
    font-weight:700; font-size:17px;
    text-decoration:none; color:var(--ink);
  }
  .brand img{
    width:26px; height:26px; display:block;
  }
  .nav-links{
    display:flex; align-items:center; gap:20px; list-style:none; margin:0; padding:0;
    flex-wrap:nowrap; white-space:nowrap;
  }
  .nav-links a{
    text-decoration:none; font-size:13.5px; color:var(--ink-soft);
    transition:color .15s ease;
  }
  .nav-links a:hover{color:var(--ink);}
  .nav-mobile-toggle{display:none;}
  .lang-switch{
    position:relative;
    font-family:var(--mono); font-size:12px; color:var(--ink-faint);
    flex:none; margin-left:8px;
  }
  .lang-current{
    display:flex; align-items:center; gap:6px;
    background:none; border:1px solid var(--line); border-radius:var(--radius);
    padding:6px 10px; cursor:pointer;
    font-family:var(--mono); font-size:12px; color:var(--ink-soft);
  }
  .lang-current:hover{color:var(--ink); border-color:var(--ink-faint);}
  .lang-caret{transition:transform .15s ease;}
  .lang-switch.open .lang-caret{transform:rotate(180deg);}
  .lang-menu{
    display:none;
    position:absolute; top:calc(100% + 6px); right:0;
    min-width:150px; max-height:320px; overflow-y:auto;
    background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
    box-shadow:0 8px 24px rgba(0,0,0,0.12);
    list-style:none; margin:0; padding:6px; z-index:60;
  }
  .lang-switch.open .lang-menu{display:block;}
  .lang-menu li{margin:0;}
  .lang-menu a{
    display:block; padding:8px 10px; border-radius:var(--radius);
    color:var(--ink-soft); text-decoration:none; font-size:13px; white-space:nowrap;
  }
  .lang-menu a:hover{background:var(--paper-soft); color:var(--ink);}
  .lang-menu a.active{color:var(--pin); font-weight:600;}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; gap:10px;
    padding:14px 24px;
    border-radius:var(--radius);
    text-decoration:none;
    font-size:15.5px; font-weight:500;
    border:1px solid transparent;
    cursor:pointer;
  }
  .btn-primary{
    background:var(--pin); color:#fff;
    box-shadow:0 1px 0 var(--pin-dark);
    transition:background .15s ease, transform .1s ease;
  }
  .btn-primary:hover{background:var(--pin-dark);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-ghost{
    background:transparent; color:var(--ink);
    border-color:var(--line);
    transition:border-color .15s ease, background .15s ease;
  }
  .btn-ghost:hover{border-color:var(--ink); background:var(--paper-soft);}

  /* ---------- hero ---------- */
  .hero{
    padding-top:38px;
    padding-bottom:32px;
    display:grid;
    grid-template-columns:1.05fr 0.95fr;
    gap:48px;
    align-items:center;
  }
  .hero > *{ min-width:0; }
  .eyebrow-tag{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13.5px; color:var(--ink-soft);
    margin-bottom:18px;
  }
  .eyebrow-tag .kbd{
    font-size:12px; background:var(--paper-soft); border:1px solid var(--line);
    padding:2px 7px; border-radius:3px;
  }
  .hero h1{
    font-size:clamp(34px,4.4vw,52px);
    margin-bottom:18px;
  }
  .hero .lede{margin-bottom:30px;}
  .hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:22px;}
  .hero-note{font-size:13.5px; color:var(--ink-faint);}

  /* keycap visual */
  .keys-stage{
    background:var(--paper-soft);
    border:1px solid var(--line);
    border-radius:8px;
    padding:40px 30px;
    display:flex; flex-direction:column; align-items:center; gap:22px;
  }
  .key-row{display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:center;}
  .key{
    font-family:var(--mono);
    font-size:14px; font-weight:500;
    color:#f2f2f0;
    background:linear-gradient(180deg, #2a2c31, var(--key-bg));
    border:1px solid var(--key-edge);
    border-bottom:3px solid var(--key-edge);
    border-radius:6px;
    padding:11px 16px;
    min-width:26px;
    text-align:center;
    box-shadow:0 2px 0 rgba(0,0,0,.15);
  }
  .key.wide{padding:11px 22px;}
  .key.accent{
    color:#fff;
    background:linear-gradient(180deg, #e05a3c, var(--pin));
    border-color:var(--pin-dark);
    border-bottom-color:var(--pin-dark);
  }
  .plus{color:var(--ink-faint); font-size:13px;}
  .keys-caption{
    font-family:var(--mono); font-size:12.5px; color:var(--ink-faint);
    text-align:center;
  }
  .keys-arrow{color:var(--ink-faint); font-size:20px;}

  /* ---------- section shell ---------- */
  section{padding:37px 0;}
  .section-soft{background:var(--paper-soft); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end; gap:24px;
    margin-bottom:44px; flex-wrap:wrap;
  }
  .section-head .lede{margin-top:10px;}

  /* ---------- feature grid ---------- */
  .grid-3{
    display:grid; grid-template-columns:repeat(3, 1fr); gap:1px;
    background:var(--line); border:1px solid var(--line);
  }
  .grid-3 > div{background:var(--paper); padding:28px;}
  .feat h3{margin-bottom:10px;}
  .feat p{color:var(--ink-soft); font-size:15px;}
  .feat-mark{
    width:30px; height:30px;
    border:1.5px solid var(--ink);
    border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    font-family:var(--mono); font-size:13px;
    margin-bottom:16px;
  }

  /* ---------- steps ---------- */
  .steps-layout{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start;}
  .steps{border-top:1px solid var(--line);}
  .step{
    display:grid; grid-template-columns:44px 1fr;
    gap:18px;
    padding:24px 0;
    border-bottom:1px solid var(--line);
  }
  .step-num{
    font-family:var(--mono); font-size:14px; color:var(--pin); font-weight:600;
    padding-top:2px;
  }
  .step h3{margin-bottom:6px; font-size:17px;}
  .step p{color:var(--ink-soft); font-size:14.5px;}

  /* ---------- demo popup ---------- */
  .demo{
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:8px;
    box-shadow:0 18px 40px -18px rgba(20,20,20,.25);
    overflow:hidden;
    position:sticky; top:90px;
  }
  .demo-bar{
    display:flex; align-items:center; justify-content:space-between;
    padding:12px 16px; border-bottom:1px solid var(--line);
    background:var(--paper-soft);
  }
  .demo-bar span{font-family:var(--mono); font-size:12.5px; color:var(--ink-soft);}
  .demo-list{list-style:none; margin:0; padding:8px;}
  .demo-item{
    display:flex; align-items:center; gap:6px;
    padding:9px 8px; border-radius:6px;
  }
  .demo-item:hover{background:var(--paper-soft);}
  .demo-item .txt{
    flex:1; min-width:0; font-size:13px; color:var(--ink);
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  .demo-item.is-pinned .txt::before{content:"📌 "; }
  .demo-item.is-postponed{opacity:.45;}
  .demo-btn{
    border:1px solid var(--line); background:var(--paper);
    width:25px; height:25px; border-radius:5px; flex:none;
    font-size:12px; cursor:pointer; line-height:1;
    display:flex; align-items:center; justify-content:center;
    transition:border-color .15s ease, background .15s ease;
  }
  .demo-btn:hover{border-color:var(--ink);}
  .demo-btn.on{background:var(--pin-tint); border-color:var(--pin); color:var(--pin-dark);}
  .demo-btn:disabled{opacity:.3; cursor:not-allowed;}
  .demo-btn:disabled:hover{border-color:var(--line);}
  .demo-footer{
    padding:10px 16px; border-top:1px solid var(--line);
    font-size:12px; color:var(--ink-faint); text-align:center;
  }

  /* ---------- tabs mock ---------- */
  .tabs-panel{
    display:grid; grid-template-columns:repeat(3,1fr);
    gap:1px; background:var(--line); border:1px solid var(--line);
    margin-top:46px;
  }
  .tab-card{background:var(--paper); padding:26px;}
  .tab-card .tab-name{
    font-family:var(--mono); font-size:12.5px; color:var(--pin);
    margin-bottom:10px; display:block;
  }
  .tab-card p{color:var(--ink-soft); font-size:14.5px;}

  /* ---------- two-col deep dive ---------- */
  .dive{
    display:grid; grid-template-columns:0.9fr 1.1fr; gap:56px; align-items:center;
  }
  .dive.reverse{grid-template-columns:1.1fr 0.9fr;}
  .dive.reverse .dive-visual{order:2;}
  .dive-visual{
    background:var(--paper-soft); border:1px solid var(--line); border-radius:8px;
    padding:34px; min-height:220px; display:flex; align-items:center; justify-content:center;
  }
  .dive-text h2{margin-bottom:16px;}
  .dive-text .lede{margin-bottom:20px;}
  .dive-list{list-style:none; margin:18px 0 0; padding:0; font-size:14.5px; color:var(--ink-soft);}
  .dive-list li{padding:7px 0 7px 20px; position:relative;}
  .dive-list li::before{
    content:""; position:absolute; left:0; top:15px;
    width:6px; height:6px; background:var(--pin); border-radius:50%;
  }

  .pin-visual .key{font-size:26px; background:none; border:none; box-shadow:none; padding:0;}
  .pin-stack{display:flex; flex-direction:column; gap:10px; width:100%; max-width:260px;}
  .pin-row{
    display:flex; align-items:center; gap:10px;
    background:var(--paper); border:1px solid var(--line); border-radius:6px;
    padding:10px 12px; font-size:13px;
  }
  .pin-row.top{border-color:var(--pin); background:var(--pin-tint);}
  .pin-row .pin-icon{color:var(--pin); font-size:13px;}
  .postpone-visual{display:flex; flex-direction:column; gap:14px; align-items:center;}
  .postpone-arrow{font-family:var(--mono); color:var(--ink-faint); font-size:12px;}
  .postpone-row{
    background:var(--paper); border:1px dashed var(--line); border-radius:6px;
    padding:10px 14px; font-size:13px; color:var(--ink-faint); width:220px; text-align:center;
  }

  /* ---------- screenshots ---------- */
  .screens-row{
    display:flex; align-items:flex-start; justify-content:center; gap:8px;
    margin-top:32px; flex-wrap:nowrap;
  }
  .screen-card{
    background:var(--paper); border:1px solid var(--line); border-radius:10px;
    padding:6px; display:flex; flex-direction:column; align-items:center; gap:6px;
    box-shadow:0 14px 30px -18px rgba(20,20,20,.18);
    flex:0 0 auto;
  }
  .screen-card img{
    height:300px; width:auto; display:block; border:1px solid var(--line);
    border-radius:4px; cursor:zoom-in;
    transition:filter .15s ease;
  }
  .screen-card img:hover{filter:brightness(0.96);}
  .screen-card figcaption{
    font-size:12.5px; color:var(--ink-faint); font-family:var(--mono);
  }

  /* ---------- lightbox ---------- */
  .lightbox{
    position:fixed; inset:0; background:rgba(15,16,19,.88);
    display:none; align-items:center; justify-content:center;
    z-index:300; padding:32px; cursor:zoom-out;
  }
  .lightbox.active{display:flex;}
  .lightbox img{
    max-width:92vw; max-height:88vh; width:auto; height:auto;
    border-radius:8px; box-shadow:0 30px 70px -20px rgba(0,0,0,.55);
  }
  .lightbox-close{
    position:absolute; top:20px; right:24px;
    width:38px; height:38px; border-radius:50%;
    background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.25);
    color:#fff; font-size:18px; line-height:1; cursor:pointer;
    display:flex; align-items:center; justify-content:center;
  }
  .lightbox-close:hover{background:rgba(255,255,255,.22);}
  .lightbox-hint{
    position:absolute; bottom:22px; left:0; right:0; text-align:center;
    color:rgba(255,255,255,.6); font-size:12.5px; font-family:var(--mono);
  }

  /* ---------- settings table ---------- */
  .settings-grid{display:grid; grid-template-columns:1fr 1fr; gap:48px;}
  .hotkeys{list-style:none; margin:0; padding:0;}
  .hotkeys li{
    display:flex; align-items:center; justify-content:space-between;
    padding:13px 0; border-bottom:1px solid var(--line); font-size:14.5px;
  }
  .hotkeys li:first-child{
    color:var(--ink-soft);
  }
  .hotkeys .combo{font-family:var(--mono); font-size:13px; background:var(--paper-soft); padding:4px 9px; border-radius:4px; border:1px solid var(--line);}
  .toggle-list{list-style:none; margin:0; padding:0;}
  .toggle-list li{
    display:flex; align-items:center; gap:12px;
    padding:11px 0; border-bottom:1px solid var(--line); font-size:14.5px; color:var(--ink-soft);
  }
  .toggle-dot{
    width:34px; height:19px; border-radius:10px; background:var(--pin);
    position:relative; flex:none;
  }
  .toggle-dot::after{
    content:""; position:absolute; top:2px; right:2px; width:15px; height:15px;
    background:#fff; border-radius:50%;
  }

  /* ---------- portability / file tree ---------- */
  .tree-block{
    display:grid; grid-template-columns:0.95fr 1.05fr; gap:56px; align-items:center;
  }
  .tree{
    background:var(--key-bg); color:#e7e7e4;
    border-radius:8px; padding:26px 28px;
    font-family:var(--mono); font-size:13px; line-height:1.85;
    overflow-x:auto;
  }
  .tree .dim{color:#8b8d93;}
  .tree .hl{color:#f0a58f;}

  .reliability-list{list-style:none; margin:0; padding:0; display:grid; gap:16px;}
  .reliability-list li{
    display:grid; grid-template-columns:20px 1fr; gap:12px;
    font-size:14.5px; color:var(--ink-soft);
  }
  .reliability-list li::before{content:"✓"; color:var(--pin); font-weight:600;}

  /* ---------- languages ---------- */
  .lang-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:28px;}
  .lang-chip{
    font-size:11.5px; padding:6px 11px; border:1px solid var(--line); border-radius:20px;
    color:var(--ink-soft); background:var(--paper); white-space:nowrap;
    text-decoration:none; transition:border-color .15s ease, color .15s ease;
  }
  .lang-chip:hover{border-color:var(--ink); color:var(--ink);}
  .lang-chip.main{
    border-color:var(--ink); color:var(--ink); font-weight:600; background:var(--paper-soft);
  }
  @media (min-width: 900px){
    .lang-row{flex-wrap:nowrap;}
  }

  /* ---------- specs table ---------- */
  .specs-table{
    border-top:1px solid var(--line);
    margin-top:8px;
  }
  .specs-row{
    display:grid; grid-template-columns:1fr 2fr;
    gap:24px;
    padding:16px 0;
    border-bottom:1px solid var(--line);
  }
  .specs-row .specs-label{
    font-family:var(--mono); font-size:13px; color:var(--ink-faint);
    padding-top:2px;
  }
  .specs-row .specs-value{font-size:14.5px; color:var(--ink);}
  .specs-row .specs-value code{background:var(--paper-soft); padding:1px 6px; border-radius:3px; border:1px solid var(--line); font-size:13px;}

  /* ---------- requirements ---------- */
  .req-row{
    display:grid; grid-template-columns:repeat(4, 1fr); gap:1px;
    background:var(--line); border:1px solid var(--line);
    margin-top:40px; text-align:center;
  }
  .req-cell{
    background:var(--paper); padding:26px 18px;
    display:flex; flex-direction:column; align-items:center;
  }
  .req-cell .req-label{font-size:12px; color:var(--ink-faint); font-family:var(--mono); margin-bottom:8px;}
  .req-cell .req-value{font-size:15px; font-weight:500;}

  /* ---------- download ---------- */
  .download{
    text-align:center; padding:48px 0 50px;
  }
  .download h2{margin-bottom:14px;}
  .download .lede{margin:0 auto 36px; text-align:center;}
  .download-card{
    display:inline-flex; align-items:center; gap:22px;
    border:1px solid var(--line); border-radius:10px;
    padding:22px 28px; background:var(--paper-soft);
    text-align:left; flex-wrap:wrap; justify-content:center;
  }
  .download-meta{font-size:13px; color:var(--ink-faint); font-family:var(--mono);}
  .download-meta div{padding:2px 0;}

  /* ---------- footer ---------- */
  footer{
    border-top:1px solid var(--line);
    background:var(--paper-soft);
    padding:28px 0 0;
  }
  .footer-grid{
    display:grid; grid-template-columns:1.2fr 1fr 1fr; gap:40px;
    padding-bottom:40px;
  }
  .footer-col h4{
    font-size:13px; font-weight:600; color:var(--ink);
    margin:0 0 16px;
  }
  .footer-col p{font-size:13.5px; color:var(--ink-soft); max-width:32ch;}
  .footer-col .brand{margin-bottom:14px;}
  .footer-links{display:flex; flex-direction:column; gap:11px; list-style:none; margin:0; padding:0;}
  .footer-links a{font-size:13.5px; color:var(--ink-soft); text-decoration:none;}
  .footer-links a:hover{color:var(--ink);}
  .footer-donate{
    display:inline-flex; align-items:center; gap:8px;
    background:var(--ink); color:#fff;
    padding:10px 16px; border-radius:var(--radius);
    text-decoration:none; font-size:13.5px; font-weight:500;
    margin-top:6px; transition:background .15s ease;
    border:none; font-family:var(--sans); cursor:pointer;
  }
  .footer-donate:hover{background:var(--pin);}
  .footer-donate.copied{background:#2a8f4f;}
  .footer-bottom{
    border-top:1px solid var(--line);
    padding:20px 0;
    display:flex; justify-content:space-between; align-items:center;
    flex-wrap:wrap; gap:10px;
  }
  .footer-bottom p{font-size:12.5px; color:var(--ink-faint); margin:0;}

  /* ---------- responsive ---------- */
  @media (max-width: 880px){
    .hero{grid-template-columns:1fr; padding-top:28px;}
    .steps-layout{grid-template-columns:1fr;}
    .demo{position:static;}
    .grid-3{grid-template-columns:1fr;}
    .dive, .dive.reverse{grid-template-columns:1fr;}
    .dive.reverse .dive-visual{order:0;}
    .settings-grid{grid-template-columns:1fr;}
    .tabs-panel{grid-template-columns:1fr;}
    .screens-row{flex-direction:column; align-items:center;}
    .screen-card img{height:auto; width:100%; max-width:360px;}
    .tree-block{grid-template-columns:1fr;}
    .specs-row{grid-template-columns:1fr;}
    .req-row{grid-template-columns:1fr 1fr;}
    .nav-links{display:none;}
  }
  @media (max-width:520px){
    .req-row{grid-template-columns:1fr;}
    .hero-actions{flex-direction:column; align-items:stretch;}
  }
  @media (max-width:760px){
    .footer-grid{grid-template-columns:1fr; gap:32px;}
  }