:root{color-scheme:light;--page-bg: #ffffff;--border: #d9d9d9;--text-main: #1b1b1b;--text-subtle: #616161;--brand: #0067b8;--brand-hover: #005da6;--ring: rgba(0, 103, 184, .35)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--page-bg);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:var(--text-main)}.topbar{height:48px;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 18px;font-size:15px;color:var(--text-subtle)}.shell{max-width:960px;margin:0 auto;padding:34px 18px}.title{margin:0 0 6px;font-size:34px;font-weight:600;line-height:1.15}.subtitle{margin:0 0 24px;font-size:16px;color:var(--text-subtle)}.panel{border:1px solid var(--border);padding:24px;max-width:540px;background:#fff}.download-btn{border:0;border-radius:2px;padding:11px 22px;font-size:16px;font-weight:400;cursor:pointer;background:var(--brand);color:#fff;min-width:170px;transition:background-color .12s ease}.download-btn:hover{background:var(--brand-hover)}.download-btn:focus-visible{outline:3px solid var(--ring);outline-offset:2px}@media (max-width: 640px){.title{font-size:28px}.panel{max-width:100%}.download-btn{width:100%}}