*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0a0a0a;--surface: #131313;--surface-2: #1c1c1c;--surface-3: #252525;--border: #2a2a2a;--border-strong: #3d3d3d;--text: #f0ebe0;--muted: #6e6a63;--muted-2: #4a4744;--accent: #aaff00;--accent-dark: #7acc00;--accent-dim: rgba(170, 255, 0, .08);--accent-dim2: rgba(170, 255, 0, .15);--danger: #ff4545;--ok: #aaff00;--radius: 2px}body{background:var(--bg);color:var(--text);font-family:Bricolage Grotesque,sans-serif;font-size:15px;line-height:1.5;min-height:100vh}body.advanced-mode{--accent: #ff6b00;--accent-dark: #cc5500;--accent-dim: rgba(255, 107, 0, .08);--accent-dim2: rgba(255, 107, 0, .15)}#file-input{display:none}.shell{max-width:1400px;margin:0 auto;padding:0 24px 120px}.header{display:flex;align-items:center;justify-content:space-between;padding:20px 0;border-bottom:1px solid 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.mode-dot{background:var(--accent)}body.advanced-mode .mode-pill{color:var(--accent);border-color:var(--accent);background:var(--accent-dim)}.divider{height:1px;background:var(--border)}.step-label{font-size:.68rem;font-family:Fira Code,monospace;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:8px}.step-label:before{content:"";display:inline-block;width:16px;height:1px;background:var(--muted-2)}.workspace{display:grid;grid-template-columns:360px 1fr;gap:1px;background:var(--border);margin-top:1px}.pane{background:var(--bg);padding:24px}.drop-zone{border:1px dashed var(--border-strong);background:var(--surface);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:220px;gap:10px;text-align:center;padding:32px 20px;transition:all 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var(--border)}.popup-bg{position:fixed;inset:0;background:#000000bf;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:none;align-items:center;justify-content:center}.popup-bg.visible{display:flex}.popup{background:var(--surface);border:1px solid var(--border-strong);border-radius:4px;padding:32px;max-width:680px;width:calc(100% - 32px);max-height:calc(100vh - 32px);overflow-y:auto;animation:pop-in .2s ease}@keyframes pop-in{0%{opacity:0;transform:scale(.95) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}#popup h2{font-size:1.3rem;font-weight:800;margin-bottom:10px}#popup p{font-size:.85rem;color:var(--muted);margin-bottom:20px;font-family:Fira Code,monospace;line-height:1.6}#popup button{padding:9px 20px;font:inherit;font-size:.8rem;font-weight:700;cursor:pointer;border-radius:var(--radius);transition:all .15s;letter-spacing:.04em;background:var(--accent);border:none;color:#000}#popup button:hover{background:var(--accent-dark)}@media(max-width:900px){.workspace{grid-template-columns:1fr}}@media(max-width:600px){.shell{padding:0 12px 100px}.brand-sep,.brand-sub{display:none}.action-inner{flex-direction:column;align-items:stretch;gap:10px}.selection-summary{display:none!important}.convert-btn{width:100%;text-align:center}.format-grid{grid-template-columns:repeat(auto-fill,minmax(88px,1fr))}}