:root{
    --bg:#f1ece3;--bg-2:#eae4d8;--card:#ffffff;--ink:#16130f;--ink-2:#46423a;--muted:#9a948a;
    --line:#e2dccf;--line-soft:#ebe6db;--accent:#ec3e1f;--accent-press:#d4361a;--accent-tint:#fbe7e0;
    --black:#16130f;--on-black:#efece6;--on-black-2:#b6b1a8;--maxw:1180px;
  }
  html[data-theme="dark"]{
    --bg:#15120e;--bg-2:#1d1914;--card:#211c16;--ink:#f3eee4;--ink-2:#c4bcad;--muted:#8a8377;
    --line:#322c23;--line-soft:#2a251d;--accent:#f0492a;--accent-press:#ec3e1f;--accent-tint:#3a1c12;
    --black:#0f0c08;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;overflow-x:clip}
  .skills-catalog-page{font-family:'Onest',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5;
    font-synthesis:style;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-wrap:break-word}
  h1.hero-h,h2.head{overflow-wrap:break-word}
  em{font-style:oblique 9deg;font-synthesis:style oblique}
  a{color:inherit}
  .mono{font-family:'JetBrains Mono',monospace}
  ::selection{background:var(--accent);color:#fff}

  .scrollbar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--accent);z-index:90;transition:width .1s linear}

  .nav{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line)}
  .nav-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:22px;padding:15px 40px}
  .logo{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:700;white-space:nowrap;letter-spacing:-.01em}
  .logo .dot{width:16px;height:16px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--accent-tint)}
  .logo .tld{color:var(--muted);font-weight:500}
  .crumb{font-size:14px;color:var(--ink-2);font-weight:500;max-width:230px;line-height:1.25;border-left:1px solid var(--line);padding-left:22px}
  .nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
  .nav-count{font-size:14px;color:var(--muted);font-weight:500;white-space:nowrap}
  .nav-count b{color:var(--ink);font-weight:700}
  .theme-btn{flex:none;width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:var(--card);color:var(--ink-2);display:grid;place-items:center;cursor:pointer;transition:.18s}
  .theme-btn:hover{border-color:var(--accent);color:var(--accent)}
  .theme-btn svg{width:19px;height:19px}
  .theme-btn .moon{display:none}
  html[data-theme="dark"] .theme-btn .sun{display:none}
  html[data-theme="dark"] .theme-btn .moon{display:block}

  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}
  .eyebrow{display:flex;align-items:center;gap:22px;margin-bottom:34px}
  .badge{flex:none;width:58px;height:42px;border-radius:13px;background:var(--black);color:var(--on-black);display:grid;place-items:center;font-size:16px;font-weight:600;letter-spacing:.02em}
  .eyebrow .rule{flex:1;height:1px;background:var(--line)}
  .eyebrow .lab{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);white-space:nowrap}

  .hero{padding-top:64px;padding-bottom:40px}
  .pillbar{display:flex;align-items:center;flex-wrap:wrap;gap:10px 24px;background:var(--bg-2);border-radius:999px;padding:15px 28px;margin-bottom:42px;font-size:15.5px;color:var(--ink-2);width:fit-content;max-width:100%}
  .pillbar .pd{width:11px;height:11px;border-radius:50%;background:var(--accent);flex:none}
  .pillbar .hi{color:var(--accent);font-weight:600}
  .pillbar .sep{width:1px;height:20px;background:var(--line)}
  h1.hero-h{font-size:clamp(42px,7vw,90px);font-weight:800;letter-spacing:-.035em;line-height:.98;text-wrap:balance}
  h1.hero-h .g{color:var(--muted);font-weight:700}
  h1.hero-h em{position:relative}
  h1.hero-h em::after{content:"";position:absolute;left:0;right:0;bottom:.03em;height:6px;background:var(--accent);border-radius:3px}
  .hero-sub{font-size:20px;color:var(--ink-2);max-width:64ch;margin-top:32px;line-height:1.5;text-wrap:pretty}
  .hero-sub b{color:var(--ink);font-weight:600}

  .toolbar{position:sticky;top:64px;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line);margin-top:44px}
  .toolbar-inner{max-width:var(--maxw);margin:0 auto;padding:18px 40px}
  .search{position:relative;display:flex;align-items:center}
  .search svg.si{position:absolute;left:20px;width:20px;height:20px;color:var(--muted);pointer-events:none}
  .search input{width:100%;font-family:inherit;font-size:17px;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 52px 16px 52px;outline:none;transition:.18s}
  .search input::placeholder{color:var(--muted)}
  .search input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-tint)}
  .search .clear{position:absolute;right:14px;width:30px;height:30px;border:none;background:var(--bg-2);color:var(--ink-2);border-radius:8px;cursor:pointer;display:none;place-items:center;font-size:16px;line-height:1}
  .search .clear:hover{background:var(--accent);color:#fff}
  .search .clear.show{display:grid}
  .chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}
  .chip{font-family:inherit;font-size:14px;font-weight:600;color:var(--ink-2);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:9px 17px;cursor:pointer;transition:.15s;white-space:nowrap}
  .chip:hover{border-color:var(--accent);color:var(--accent-press)}
  .chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
  .legend{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:14px;font-size:13px;color:var(--muted)}
  .legend span{display:inline-flex;align-items:center;gap:8px}
  .legend .ld{width:10px;height:10px;border-radius:50%;flex:none}
  .legend .lreq{background:var(--accent)}
  .legend .lopt{background:transparent;border:1.5px solid var(--muted)}

  .skill-sec{padding-top:64px;padding-bottom:8px;scroll-margin-top:180px}
  .skill-sec.hidden{display:none}
  .skill-list{display:flex;flex-direction:column;gap:16px}

  .skill{background:var(--card);border:1px solid var(--line-soft);border-radius:20px;box-shadow:0 1px 2px rgba(22,19,15,.04);overflow:hidden;transition:border-color .15s}
  .skill.hidden{display:none}
  .skill.open{border-color:var(--line)}
  .skill-top{display:flex;align-items:flex-start;gap:24px;padding:28px 30px}
  @media(max-width:640px){.skill-top{flex-direction:column;gap:18px;padding:24px 22px}}
  .skill-meta{flex:1;min-width:0}
  .skill-name{font-family:'JetBrains Mono',monospace;font-size:18px;font-weight:600;letter-spacing:-.01em;color:var(--ink);line-height:1.25;word-break:break-word}
  .conn{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px}
  .conn-ico{flex:none;width:18px;height:18px;color:var(--accent)}
  .conn-ico svg{width:18px;height:18px}
  .conn-k{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-right:2px}
  .conn-tag{font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;white-space:nowrap}
  .conn-tag.creq{background:var(--accent-tint);color:var(--accent-press)}
  .conn-tag.copt{background:transparent;color:var(--ink-2);border:1px solid var(--line)}
  .skill-desc{font-size:16px;color:var(--ink-2);line-height:1.55;max-width:80ch;text-wrap:pretty;margin-top:14px}
  .skill-diff{font-size:14.5px;color:var(--muted);line-height:1.5;margin-top:12px;padding:12px 16px;background:var(--bg-2);border-radius:11px;border-left:2px solid var(--accent);max-width:80ch}
  .skill-diff b{color:var(--ink-2);font-weight:600}
  .skill-diff em{color:var(--ink);font-style:oblique 8deg}

  .prompt-toggle{flex:none;align-self:flex-start;display:inline-flex;align-items:center;gap:10px;font-family:inherit;font-size:14px;font-weight:600;color:var(--accent-press);background:var(--accent-tint);border:1px solid transparent;border-radius:999px;padding:9px 9px 9px 18px;cursor:pointer;transition:.15s;white-space:nowrap}
  .prompt-toggle:hover{background:var(--accent);color:#fff}
  .prompt-toggle .pt-count{display:grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:#ffffff66;font-size:12.5px;font-weight:700}
  html[data-theme="dark"] .prompt-toggle .pt-count{background:#ffffff1f}
  .prompt-toggle:hover .pt-count{background:#ffffff2e;color:#fff}
  .prompt-toggle .pt-ico{flex:none;width:24px;height:24px;border-radius:7px;background:#ffffff8a;display:grid;place-items:center;transition:transform .25s}
  html[data-theme="dark"] .prompt-toggle .pt-ico{background:#ffffff14}
  .prompt-toggle:hover .pt-ico{background:#ffffff2e}
  .prompt-toggle .pt-ico svg{width:14px;height:14px;transition:transform .25s}
  .skill.open .prompt-toggle{background:var(--accent);color:#fff}
  .skill.open .prompt-toggle .pt-ico svg{transform:rotate(45deg)}
  .skill.open .prompt-toggle .pt-count{background:#ffffff2e;color:#fff}

  .skill-actions{flex:none;display:flex;flex-direction:column;gap:10px;align-items:stretch}
  @media(max-width:640px){.skill-actions{flex-direction:row;flex-wrap:wrap;align-items:center}}
  .dl-btn{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:inherit;font-size:14px;font-weight:600;color:var(--ink-2);background:transparent;border:1px solid var(--line);border-radius:999px;padding:9px 16px;cursor:pointer;transition:.15s;white-space:nowrap}
  .dl-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
  .dl-btn .dl-ico{flex:none;width:18px;height:18px}
  .dl-btn .dl-ico svg{width:18px;height:18px;display:block}
  .dl-btn.done{background:#1f8a5b;border-color:#1f8a5b;color:#fff}
  .dl-btn .dl-lbl-done{display:none}
  .dl-btn.done .dl-lbl{display:none}
  .dl-btn.done .dl-lbl-done{display:inline}

  .src-btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:inherit;font-size:14px;font-weight:600;text-decoration:none;color:#fff;background:var(--accent);border:1px solid var(--accent);border-radius:12px;padding:11px 16px;cursor:pointer;transition:.15s;white-space:nowrap}
  .src-btn:hover{background:var(--accent-press,#c4421f);border-color:var(--accent-press,#c4421f)}
  .src-btn .dl-ico{flex:none;width:18px;height:18px}
  .src-btn .dl-ico svg{width:18px;height:18px;display:block}

  /* intro: how to choose */
  .guide{padding-top:56px;padding-bottom:8px}
  .guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
  @media(max-width:900px){.guide-grid{grid-template-columns:1fr}}
  .guide-card{background:var(--card);border:1px solid var(--line-soft);border-radius:20px;padding:28px 30px;box-shadow:0 1px 2px rgba(22,19,15,.04)}
  @media(max-width:640px){.guide-card{padding:24px 22px}}
  .guide-h{font-family:'JetBrains Mono',monospace;font-size:12.5px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:20px}
  .steps{list-style:none;display:flex;flex-direction:column;gap:13px;counter-reset:st;margin:0;padding:0}
  .steps li{display:flex;gap:14px;align-items:flex-start;font-size:15.5px;line-height:1.5;color:var(--ink-2);text-wrap:pretty}
  .steps li::before{counter-increment:st;content:counter(st);flex:none;width:26px;height:26px;border-radius:8px;background:var(--accent-tint);color:var(--accent-press);font-weight:700;font-size:13px;display:grid;place-items:center;font-family:'JetBrains Mono',monospace;margin-top:1px}
  .steps b{color:var(--ink);font-weight:600}

  /* scenario router */
  .scn-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  @media(max-width:900px){.scn-grid{grid-template-columns:1fr}}
  .scn{background:var(--bg-2);border:1px solid var(--line-soft);border-radius:18px;padding:22px 24px}
  .scn-t{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;margin-bottom:5px}
  .scn-d{font-size:13.5px;color:var(--muted);margin-bottom:16px;line-height:1.45;text-wrap:pretty}
  .scn-flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .scn-chip{font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:600;color:var(--accent-press);background:var(--accent-tint);border:1px solid transparent;border-radius:999px;padding:7px 13px;cursor:pointer;transition:.15s;white-space:nowrap}
  .scn-chip:hover{background:var(--accent);color:#fff}
  .scn-arr{flex:none;width:16px;height:16px;color:var(--muted)}

  /* input/output block inside skill detail */
  .io-block{margin-top:16px;display:grid;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);border-radius:14px;overflow:hidden}
  .io-row{display:grid;grid-template-columns:170px 1fr;background:var(--card)}
  @media(max-width:560px){.io-row{grid-template-columns:1fr}}
  .io-k{padding:13px 18px;background:var(--bg-2);font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--accent);line-height:1.3}
  .io-v{padding:13px 18px;font-size:15px;line-height:1.55;color:var(--ink-2);text-wrap:pretty}
  .io-v b{color:var(--ink);font-weight:600}

  .prompt-.skills-catalog-page{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.3,.8,.4,1)}
  .prompt-inner{padding:4px 30px 30px}
  @media(max-width:640px){.prompt-inner{padding:0 22px 24px}}
  .detail-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
  .detail-block{padding:20px 22px;background:var(--bg-2);border-radius:14px;border:1px solid var(--line-soft)}
  .detail-text{font-size:15.5px;line-height:1.6;color:var(--ink-2);max-width:82ch;text-wrap:pretty}
  .prompts-block{margin-top:24px}
  .prompt{display:flex;align-items:flex-start;gap:18px;padding:18px 20px;border-radius:14px;background:var(--card);border:1px solid var(--line)}
  .prompt+.prompt{margin-top:10px}
  @media(max-width:640px){.prompt{flex-direction:column;gap:14px}}
  .prompt-text{flex:1;font-size:15.5px;line-height:1.55;color:var(--ink-2);font-style:oblique 5deg;text-wrap:pretty}
  .copy-btn{flex:none;display:inline-flex;align-items:center;gap:7px;font-family:'Onest',sans-serif;font-size:13px;font-weight:600;color:var(--ink-2);background:var(--bg-2);border:1px solid var(--line);padding:8px 14px;border-radius:9px;cursor:pointer;transition:.15s;white-space:nowrap}
  .copy-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
  .copy-btn svg{width:14px;height:14px}
  .copy-btn .lbl-done{display:none}
  .copy-btn.copied{background:#1f8a5b;border-color:#1f8a5b;color:#fff}
  .copy-btn.copied .lbl-copy{display:none}
  .copy-btn.copied .lbl-done{display:inline}

  .empty{display:none;text-align:center;padding:80px 40px 40px}
  .empty.show{display:block}
  .empty .ee{font-family:'JetBrains Mono',monospace;font-size:14px;color:var(--accent);letter-spacing:.05em;margin-bottom:16px}
  .empty h3{font-size:26px;font-weight:700;letter-spacing:-.02em;margin-bottom:10px}
  .empty p{font-size:17px;color:var(--ink-2);max-width:48ch;margin:0 auto}

  .sig{text-align:center;padding:64px 0 50px;font-size:13px;color:var(--muted);letter-spacing:.04em}

  @media(max-width:860px){
    .crumb{display:none}.wrap{padding:0 24px}.nav-inner{padding:14px 24px}.toolbar-inner{padding:16px 24px}
    .toolbar{top:64px}.skill-sec{scroll-margin-top:200px}
  }
  @media(max-width:480px){
    .wrap{padding:0 18px}.nav-inner{padding:13px 18px;gap:12px;flex-wrap:nowrap}.toolbar-inner{padding:14px 18px}
    .nav-count{display:none}.hero{padding-top:44px}.pillbar{padding:13px 20px;font-size:14px}
    .logo{font-size:16px}.nav-right{gap:8px}
  }
  @media print{
    .nav,.toolbar,.scrollbar{display:none}.skills-catalog-page{background:#fff}
    .prompt-.skills-catalog-page{max-height:none!important}.skill{break-inside:avoid}
  }

.skills-catalog-page .toolbar-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.skills-catalog-page .sc-count{font-size:14px;color:var(--muted);font-weight:500;white-space:nowrap}
.skills-catalog-page .sc-count b{color:var(--ink);font-weight:700}
.skills-catalog-page .access-btn{text-decoration:none}
body:has(.skills-catalog-page){background:#f1ece3}
.skills-catalog-page{min-height:calc(100vh - 64px)}