/* calculator-demos shared */
/* font-display: swap */
    @font-face{font-family:"Font Awesome 6 Free";font-display:swap}
    @font-face{font-family:"Font Awesome 6 Brands";font-display:swap}
    /* Critical reset */
    *{margin:0;padding:0;box-sizing:border-box}
    body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;line-height:1.5;color:#333}
    img{max-width:100%;height:auto;display:block}
    a{text-decoration:none;color:inherit}

  *{box-sizing:border-box;margin:0;padding:0}
  body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:#f5f7fa;color:#2c3e50;line-height:1.5}
  .wrap{max-width:1200px;margin:0 auto;padding:32px 24px 40px}
  .hero{text-align:center;margin-bottom:24px}
  .tag{display:inline-block;padding:4px 12px;background:rgba(52,152,219,.12);color:#3498db;font-size:12px;font-weight:600;border-radius:20px;margin-bottom:10px}
  h1{font-size:28px;margin-bottom:8px;letter-spacing:-.5px;line-height:1.25}
  .lead{color:#5d6d7e;font-size:14px;max-width:820px;margin:0 auto;line-height:1.55}
  .highlight{background:linear-gradient(transparent 60%,rgba(231,76,60,.2) 60%);padding:0 4px}

  .matrix{background:#fff;border-radius:12px;padding:18px 20px;margin-bottom:24px;box-shadow:0 4px 20px rgba(0,0,0,.04)}
  .matrix h2{font-size:16px;margin-bottom:10px;color:#2c3e50}
  table{width:100%;border-collapse:collapse;font-size:13px}
  th,td{padding:7px 10px;text-align:left;border-bottom:1px solid #eef1f5;line-height:1.35}
  th{background:#fafbfc;font-weight:600;color:#5d6d7e;font-size:12px}
  td.y{color:#27ae60;font-weight:700;text-align:center}
  td.n{color:#bdc3c7;text-align:center}
  td.p{color:#e67e22;font-weight:600;text-align:center;font-size:12px}

  .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .card{background:#fff;border-radius:12px;padding:18px 20px;box-shadow:0 4px 20px rgba(0,0,0,.05);border-top:4px solid;transition:all .3s;display:flex;flex-direction:column}
  .card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,.1)}
  .card.a{border-color:#3498db}
  .card.b{border-color:#e74c3c}
  .card.c{border-color:#8e44ad}
  .card .ribbon{font-size:11px;letter-spacing:1px;font-weight:700;padding:3px 8px;border-radius:5px;display:inline-block;margin-bottom:8px;align-self:flex-start}
  .card.a .ribbon{background:rgba(52,152,219,.1);color:#3498db}
  .card.b .ribbon{background:rgba(231,76,60,.1);color:#e74c3c}
  .card.c .ribbon{background:rgba(142,68,173,.1);color:#8e44ad}
  .card h3{font-size:18px;margin-bottom:4px}
  .card .subtitle{color:#7f8c8d;font-size:13px;margin-bottom:12px;line-height:1.4}
  .card ul{list-style:none;margin-bottom:12px;flex:1}
  .card li{padding:4px 0;font-size:13px;color:#34495e;display:flex;gap:6px;line-height:1.4}
  .card li::before{content:"✓";color:#27ae60;font-weight:700;flex-shrink:0}
  .card .effort{background:#fafbfc;padding:8px 12px;border-radius:6px;font-size:12px;color:#7f8c8d;margin-bottom:10px}
  .card .effort b{color:#2c3e50}
  .btn{display:block;text-align:center;padding:10px;border-radius:8px;color:#fff;text-decoration:none;font-weight:700;font-size:14px;transition:all .3s}
  .card.a .btn{background:#3498db}
  .card.b .btn{background:#e74c3c}
  .card.c .btn{background:#8e44ad}
  .btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.18)}

  .back{margin-top:20px;text-align:center}
  .back a{color:#3498db;text-decoration:none;font-size:13px}
  .back a:hover{text-decoration:underline}

  .url-bar{display:inline-flex;align-items:center;gap:8px;background:#2c3e50;color:#fff;padding:6px 12px;border-radius:24px;font-size:12px;margin-top:12px;box-shadow:0 3px 10px rgba(44,62,80,.2);flex-wrap:wrap;justify-content:center;max-width:100%}
  .url-bar .lbl{opacity:.7;font-size:11px;letter-spacing:.5px}
  .url-bar a{color:#5dade2;text-decoration:none;font-family:Consolas,Monaco,monospace;font-weight:700;word-break:break-all}
  .url-bar a:hover{color:#85c1e9;text-decoration:underline}
  .url-bar .copy{background:#3498db;color:#fff;border:none;padding:3px 10px;border-radius:12px;cursor:pointer;font-size:11px;font-weight:700;transition:all .2s}
  .url-bar .copy:hover{background:#2980b9}
  .url-bar .copy.ok{background:#27ae60}

  @media (max-width:768px){
    .wrap{padding:20px 14px 28px}
    h1{font-size:22px}
    .grid{grid-template-columns:1fr;gap:12px}
    .matrix{padding:14px}
    th,td{padding:6px;font-size:12px}
  }