:root{--primary: #3b82f6;--primary-hover: #2563eb;--secondary: #64748b;--secondary-hover: #475569;--bg: #f8fafc;--surface: #ffffff;--text: #0f172a;--border: #e2e8f0;--radius: 8px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.6}.container{max-width:800px;margin:0 auto;padding:2rem 1rem}header{text-align:center;margin-bottom:2rem}header h1{font-size:2.5rem;margin-bottom:.5rem;color:#1e293b}header p{color:var(--secondary)}main{background:var(--surface);padding:2rem;border-radius:var(--radius);box-shadow:0 4px 6px -1px #0000001a}.upload-section{text-align:center;padding:2rem;border:2px dashed var(--border);border-radius:var(--radius);margin-bottom:2rem;transition:all .2s ease}.upload-section.drag-over{background-color:#f0fdf4;border-color:#22c55e}.upload-btn{display:inline-block;background:var(--primary);color:#fff;padding:.75rem 1.5rem;border-radius:var(--radius);cursor:pointer;font-weight:700;transition:background .2s;margin-bottom:1rem}.upload-btn:hover{background:var(--primary-hover)}#video-preview{width:100%;max-height:400px;background:#000;border-radius:var(--radius);margin-bottom:1.5rem}.trim-controls{display:flex;gap:1.5rem;margin-bottom:1.5rem}.control-group{flex:1}.control-group label{display:block;margin-bottom:.5rem;font-weight:500}.time-input-group{display:flex;gap:.5rem}.time-input-group input{flex:1;padding:.5rem;border:1px solid var(--border);border-radius:4px;font-size:1rem}.secondary-btn{background:var(--secondary);color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer}.secondary-btn:hover{background:var(--secondary-hover)}.action-section{text-align:center;margin-bottom:1.5rem}.primary-btn{background:var(--primary);color:#fff;border:none;padding:1rem 2rem;font-size:1.1rem;font-weight:700;border-radius:var(--radius);cursor:pointer;width:100%;transition:background .2s}.primary-btn:disabled{background:var(--secondary);cursor:not-allowed;opacity:.7}.primary-btn:hover:not(:disabled){background:var(--primary-hover)}.cancel-btn{background:#ef4444}.cancel-btn:hover:not(:disabled){background:#dc2626}#progress-container{margin-top:1rem}progress{width:100%;height:1.5rem}#result-section{text-align:center;padding:1.5rem;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:var(--radius)}.download-btn{display:inline-block;background:#16a34a;color:#fff;text-decoration:none;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:700;margin-top:1rem}.download-btn:hover{background:#15803d}.ad-placeholder{margin-top:3rem;padding:1rem;background:#f1f5f9;text-align:center;border-radius:var(--radius);min-height:100px;display:flex;align-items:center;justify-content:center;color:var(--secondary)}