:root{--bg:#f7f8fa;--surface:#fff;--text:#1a1a1a;--text-soft:#4a4a4a;--muted:#6b7280;--border:#e5e7eb;--border-strong:#d1d5db;--accent:#2563eb;--accent-hover:#1d4fd8;--shadow-sm:0 1px 2px #0f172a0a;--shadow-md:0 6px 24px -8px #0f172a1f;--shadow-lg:0 18px 48px -20px #0f172a2e;--radius:16px;--radius-sm:10px;--max:720px}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{color:var(--text-soft);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:17px;line-height:1.7}body.no-scroll{overflow:hidden}button,input,select{font:inherit;color:inherit}button{cursor:pointer}a{color:var(--accent);text-decoration:none;transition:color .15s}a:hover{color:var(--accent-hover)}.topbar{z-index:50;-webkit-backdrop-filter:saturate(180%)blur(10px);border-bottom:1px solid var(--border);background:#f7f8fad9;position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:16px;max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;position:relative}.logo{color:var(--text);letter-spacing:-.01em;align-items:center;gap:10px;font-size:16px;font-weight:700;text-decoration:none;display:inline-flex}.logo-mark{border:1.5px solid var(--accent);background:#fff;border-radius:8px;flex:none;width:28px;height:28px}.top-note{color:var(--muted);font-size:14px;font-weight:500}.bookmark-button{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:999px;padding:7px 14px;font-size:13px;font-weight:600;transition:border-color .15s,color .15s}.bookmark-button:hover,.bookmark-button:focus-visible{border-color:var(--accent);color:var(--accent);outline:none}.bookmark-hint{background:var(--text);color:#fff;max-width:320px;box-shadow:var(--shadow-md);border-radius:10px;padding:10px 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.2s;display:flex;position:relative}.screen-box:hover{box-shadow:var(--shadow-lg);border-color:var(--border-strong);transform:translateY(-2px)}.screen-box:focus-visible{border-color:var(--accent);box-shadow:0 0 0 4px #2563eb26,var(--shadow-md)}.screen-label{color:var(--muted);pointer-events:none;text-align:center;padding:0 20px;font-size:15px;font-weight:500}.screen-box.app-fullscreen{z-index:9999;width:100vw;height:100vh;aspect-ratio:auto;height:100dvh;min-height:0;box-shadow:none;cursor:default;background:#fff;border:0;border-radius:0;margin:0;position:fixed;inset:0}.screen-box.app-fullscreen.hide-cursor,.screen-box.app-fullscreen.hide-cursor *{cursor:none}.screen-box.app-fullscreen.hide-cursor .exit-button.show,.screen-box.app-fullscreen.hide-cursor .exit-button.show *{cursor:pointer}:-webkit-any(.screen-box.app-fullscreen .screen-label,.screen-box:-webkit-full-screen .screen-label,.screen-box:-webkit-full-screen .screen-label){display:none}:is(.screen-box.app-fullscreen .screen-label,.screen-box:fullscreen .screen-label){display:none}.exit-button{z-index:2147483647;color:#fff;box-shadow:var(--shadow-md);pointer-events:auto;-webkit-user-select:none;user-select:none;touch-action:manipulation;background:#111111eb;border:0;border-radius:999px;padding:10px 18px;font-size:14px;font-weight:600;display:none;position:fixed;top:20px;left:20px}:-webkit-any(.screen-box.app-fullscreen .exit-button.show,.screen-box:-webkit-full-screen .exit-button.show,.screen-box:-webkit-full-screen .exit-button.show){display:block}:is(.screen-box.app-fullscreen .exit-button.show,.screen-box:fullscreen .exit-button.show){display:block}.hero-actions{flex-wrap:wrap;align-items:center;gap:20px;margin-top:8px;display:flex}.main-button{background:var(--accent);color:#fff;border:0;border-radius:12px;padding:14px 24px;font-size:16px;font-weight:600;transition:background .15s,transform .15s,box-shadow .15s;box-shadow:0 6px 16px -6px #2563eb80}.main-button:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 10px 20px -6px #2563eb80}.plain-link{color:var(--accent);font-size:15px;font-weight:600}.plain-link:hover{text-decoration:underline}.shortcut{color:var(--muted);margin:24px 0 0;font-size:14px}kbd{border:1px solid var(--border-strong);color:var(--text);background:#fff;border-bottom-width:2px;border-radius:6px;padding:2px 7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:32px}.download-form{flex-direction:column;gap:18px;margin-top:20px;display:flex}.field label{color:var(--text);margin-bottom:8px;font-size:14px;font-weight:600;display:block}select,input[type=number]{border:1px solid var(--border);width:100%;color:var(--text);background:#fff;border-radius:10px;padding:12px 14px;font-size:15px;transition:border-color .15s,box-shadow .15s}select:focus,input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #2563eb26}.size-row{grid-template-columns:1fr 1fr;gap:14px;display:grid}.download-button{background:var(--accent);color:#fff;border:0;border-radius:12px;width:100%;padding:14px 20px;font-size:16px;font-weight:600;transition:background .15s,transform .15s;box-shadow:0 6px 16px -6px #2563eb80}.download-button:hover{background:var(--accent-hover);transform:translateY(-1px)}.prose p{margin:0 0 16px}.prose ul{margin:0 0 16px;padding-left:22px}.prose li{margin-bottom:8px}.faq-list{flex-direction:column;gap:10px;margin-top:20px;display:flex}.faq-list details{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:4px 18px;transition:border-color .15s,box-shadow .15s}.faq-list details[open]{border-color:var(--border-strong);box-shadow:var(--shadow-sm)}.faq-list summary{cursor:pointer;color:var(--text);justify-content:space-between;align-items:center;gap:16px;padding:14px 0;font-size:16px;font-weight:600;list-style:none;display:flex}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";color:var(--muted);font-size:22px;font-weight:400;line-height:1;transition:transform .2s}.faq-list details[open] summary:after{content:"−"}.faq-list details p{color:var(--text-soft);margin:0 0 14px}.footer{border-top:1px solid var(--border);text-align:center;color:var(--muted);padding:28px 20px;font-size:14px}.footer p{margin:4px 0}@media(max-width:600px){.page{padding:32px 18px 64px}.card{padding:22px}section{margin-bottom:44px}.size-row{grid-template-columns:1fr}.hero-actions{gap:14px}.main-button,.download-button{width:100%}.top-note{display:none}}