:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f5f8;--surface:#fff;--surface-muted:#eef0f4;--border:#e2e5ec;--border-strong:#c9cedb;--text:#181b25;--text-muted:#5c6373;--accent:#4f46e5;--accent-strong:#4338ca;--accent-soft:#4f46e51a;--accent-contrast:#fff;--success:#15803d;--success-soft:#16a34a1f;--danger:#b42318;--danger-soft:#d92d201a;--warning-text:#7a4d0b;--warning-soft:#f790091f;--warning-border:#f7900966;--radius-lg:18px;--radius-md:12px;--radius-sm:9px;--shadow-card:0 1px 2px #10121b0d, 0 16px 40px -12px #10121b1f}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#101218;--surface:#181b23;--surface-muted:#20242f;--border:#2a2f3c;--border-strong:#3a4152;--text:#e9ebf2;--text-muted:#9aa2b5;--accent:#818cf8;--accent-strong:#a5b0fc;--accent-soft:#818cf829;--accent-contrast:#10121a;--success:#4ade80;--success-soft:#4ade8024;--danger:#f97066;--danger-soft:#f9706624;--warning-text:#fdb022;--warning-soft:#fdb0221f;--warning-border:#fdb02266;--shadow-card:0 1px 2px #0006, 0 16px 40px -12px #00000080}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.55}img{max-width:100%;display:block}button,input,output{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.app-shell{flex-direction:column;min-height:100vh;display:flex}.shell-inner{width:100%;max-width:960px;margin:0 auto;padding:0 20px}.site-header{z-index:10;background:color-mix(in srgb, var(--bg) 82%, transparent);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;min-height:60px;display:flex}.brand{color:var(--text);align-items:center;gap:10px;font-size:1.05rem;font-weight:750;text-decoration:none;display:inline-flex}.brand-mark{color:#fff;background:linear-gradient(135deg,#6366f1,#8b5cf6);border-radius:9px;place-items:center;width:30px;height:30px;display:grid}.site-nav{align-items:center;gap:6px;display:flex}.nav-actions{border-left:1px solid var(--border);align-items:center;gap:4px;margin-left:6px;padding-left:10px;display:flex}.icon-button{border-radius:var(--radius-sm);width:40px;height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:0;place-items:center;padding:0;display:grid}.icon-button:hover{background:var(--surface-muted);color:var(--text)}.site-nav a{color:var(--text-muted);border-radius:var(--radius-sm);padding:10px 12px;font-size:.95rem;font-weight:500;text-decoration:none}.site-nav a:hover{color:var(--text);background:var(--surface-muted)}main{flex:1;width:100%;max-width:960px;margin:0 auto;padding:0 20px 48px}.hero{text-align:center;max-width:720px;margin:0 auto;padding:52px 0 32px}.hero-eyebrow{background:var(--accent-soft);color:var(--accent-strong);letter-spacing:.05em;text-transform:uppercase;border-radius:999px;margin:0 0 14px;padding:6px 14px;font-size:.78rem;font-weight:650;display:inline-block}.hero h1{letter-spacing:-.02em;margin:0 0 14px;font-size:clamp(2rem,5vw,3rem);line-height:1.12}.hero-subtitle{color:var(--text-muted);margin:0;font-size:1.08rem}.converter-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:860px;box-shadow:var(--shadow-card);flex-direction:column;gap:18px;margin:12px auto 0;padding:20px;scroll-margin-top:84px;display:flex}.dropzone{text-align:center;border:2px dashed var(--border-strong);border-radius:var(--radius-md);background:var(--surface-muted);cursor:pointer;flex-direction:column;align-items:center;gap:6px;padding:36px 20px;transition:border-color .15s,background-color .15s;display:flex}.dropzone:hover,.dropzone:focus-visible{border-color:var(--accent)}.dropzone.is-dragging{border-color:var(--accent);background:var(--accent-soft)}.dropzone-icon{background:var(--accent-soft);width:44px;height:44px;color:var(--accent);border-radius:50%;place-items:center;margin-bottom:6px;display:grid}.dropzone-title{margin:0;font-size:1.05rem;font-weight:650}.dropzone-hint{color:var(--text-muted);margin:0;font-size:.85rem}.queue-notice{background:var(--warning-soft);border:1px solid var(--warning-border);border-radius:var(--radius-sm);color:var(--warning-text);justify-content:space-between;align-items:center;gap:12px;margin:0;padding:10px 14px;font-size:.92rem;display:flex}.notice-dismiss{color:inherit;cursor:pointer;background:0 0;border:0;border-radius:6px;padding:4px 8px;font-size:1.1rem;line-height:1}.settings-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px 28px;display:grid}.settings-grid>.resize-panel{grid-column:1/-1}.control-block{border:0;flex-direction:column;gap:8px;min-inline-size:0;margin:0;padding:0;display:flex}.control-label{color:var(--text);justify-content:space-between;align-items:baseline;padding:0;font-size:.85rem;font-weight:650;display:flex}.control-note{color:var(--text-muted);margin:0;font-size:.8rem}.segmented{background:var(--surface-muted);border-radius:var(--radius-sm);gap:4px;width:fit-content;padding:4px;display:flex}.segmented button{min-width:76px;min-height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:0;border-radius:7px;padding:8px 18px;font-weight:600}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--text);box-shadow:0 1px 3px #10121b2e}.segmented button:disabled{opacity:.45;cursor:not-allowed}.quality-value{color:var(--accent-strong);font-variant-numeric:tabular-nums;font-weight:700}input[type=range]{width:100%;min-height:28px;accent-color:var(--accent)}input[type=range]:disabled{opacity:.5}.resize-modes{flex-wrap:wrap;gap:4px 14px;display:flex}.radio-option,.checkbox-option{cursor:pointer;align-items:center;gap:8px;min-height:44px;padding:0 4px;font-size:.92rem;display:inline-flex}.radio-option input,.checkbox-option input{width:17px;height:17px;accent-color:var(--accent);margin:0}.checkbox-option:has(input:disabled){opacity:.5;cursor:not-allowed}.resize-dimension{color:var(--text-muted);align-items:center;gap:10px;font-size:.92rem;display:flex}.resize-dimension input{border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);width:130px;min-height:42px;color:var(--text);padding:9px 12px}.resize-toggles{flex-wrap:wrap;gap:2px 20px;display:flex}.background-row{border:1px solid var(--border);border-radius:var(--radius-sm);flex-direction:column;gap:10px;padding:12px 14px;display:flex}.background-row.is-warning{background:var(--warning-soft);border-color:var(--warning-border)}.transparency-warning{color:var(--warning-text);margin:0;font-size:.92rem}.background-picker{align-items:center;gap:12px;font-size:.92rem;font-weight:600;display:inline-flex}.background-picker input[type=color]{border:1px solid var(--border-strong);background:var(--surface);cursor:pointer;border-radius:8px;width:46px;height:34px;padding:2px}.file-queue{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.file-card{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);align-items:center;gap:14px;padding:10px 12px;display:flex}.file-card.is-failed{border-color:color-mix(in srgb, var(--danger) 45%, var(--border))}.file-thumb{background:var(--surface-muted);object-fit:cover;border-radius:8px;flex-shrink:0;width:48px;height:48px}.file-thumb-empty{color:var(--text-muted);place-items:center;font-weight:700;display:grid}.file-body{flex:1;min-width:0}.file-name{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:.95rem;font-weight:600;overflow:hidden}.format-transition{letter-spacing:.02em;align-items:center;gap:6px;margin:3px 0 0;font-size:.75rem;font-weight:700;display:inline-flex}.format-from,.format-arrow{color:var(--text-muted)}.format-to{color:var(--accent-strong)}.file-meta{color:var(--text-muted);margin:2px 0 0;font-size:.82rem}.file-savings{color:var(--success);font-weight:650}.file-growth{color:var(--warning-text);font-weight:650}.file-error{color:var(--danger);margin:4px 0 0;font-size:.82rem}.status-badge{background:var(--surface-muted);color:var(--text-muted);letter-spacing:.02em;border-radius:999px;flex-shrink:0;padding:4px 10px;font-size:.75rem;font-weight:650}.status-ready,.status-converting{background:var(--accent-soft);color:var(--accent-strong)}.status-converting{animation:1.2s ease-in-out infinite pulse}.status-done{background:var(--success-soft);color:var(--success)}.status-failed{background:var(--danger-soft);color:var(--danger)}@keyframes pulse{50%{opacity:.55}}.file-actions{flex-shrink:0;gap:8px;display:flex}.btn{border-radius:var(--radius-sm);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;min-height:44px;padding:10px 22px;font-size:.95rem;font-weight:650;text-decoration:none;transition:background-color .15s,border-color .15s,color .15s;display:inline-flex}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-small{min-height:36px;padding:6px 14px;font-size:.85rem}.btn-primary{background:var(--accent);color:var(--accent-contrast)}.btn-primary:hover:not(:disabled){background:var(--accent-strong)}.btn-secondary{background:var(--surface);border-color:var(--border-strong);color:var(--text)}.btn-secondary:hover:not(:disabled){border-color:var(--accent);color:var(--accent-strong)}.btn-ghost{color:var(--text-muted);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--surface-muted);color:var(--text)}.convert-bar{border-top:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;padding-top:16px;display:flex}.convert-summary{color:var(--text-muted);margin:0;font-size:.92rem}.convert-actions{flex-wrap:wrap;gap:10px;display:flex}.trust-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:48px;display:grid}.trust-grid article{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);padding:20px}.trust-grid h2{margin:0 0 8px;font-size:1.02rem}.trust-grid p{color:var(--text-muted);margin:0;font-size:.92rem}.formats,.faq{margin-top:56px;scroll-margin-top:84px}.formats h2,.faq h2{letter-spacing:-.01em;margin:0 0 18px;font-size:1.5rem}.formats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.formats h3{color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px;font-size:.85rem}.format-chips{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.format-chips li{border:1px solid var(--border);background:var(--surface);border-radius:999px;padding:7px 12px;font-size:.88rem;font-weight:550}.formats-note{color:var(--text-muted);margin:12px 0 0;font-size:.85rem}.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.faq-grid article{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);padding:18px 20px}.faq-grid h3{margin:0 0 8px;font-size:.98rem}.faq-grid p{color:var(--text-muted);margin:0;font-size:.9rem}.site-footer{border-top:1px solid var(--border);margin-top:56px}.footer-inner{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:20px;padding-bottom:24px;font-size:.88rem;display:flex}.footer-link{color:inherit;align-items:center;gap:8px;text-decoration:none;display:inline-flex}.footer-link:hover{color:var(--text)}.footer-build-pill{border:1px solid var(--border);background:var(--surface-muted);min-height:28px;color:var(--text);border-radius:999px;align-items:center;padding:0 10px;font-size:.82rem;line-height:1;display:inline-flex}@media (width<=760px){.settings-grid,.trust-grid,.formats-grid,.faq-grid{grid-template-columns:1fr}.hero{padding-top:36px}.file-card{flex-wrap:wrap}.file-actions{justify-content:flex-end;width:100%}.file-actions .btn-small{min-height:44px;padding:10px 18px}.convert-bar{flex-direction:column;align-items:stretch}.convert-actions .btn{flex:1}.site-nav a{padding:10px 8px}}@media (width<=460px){.header-inner{gap:8px}.brand{font-size:1rem}.brand-text{display:none}.site-nav{gap:0}.site-nav a:not(.icon-button){padding:10px 6px;font-size:.88rem}.nav-actions{margin-left:4px;padding-left:6px}.icon-button{width:44px;height:44px}}