:root{--bg: #0b1020;--panel: #121832;--panel-border: #263056;--text: #e8ecfb;--muted: #93a0c7;--accent: #2563eb;--accent-hover: #1d4ed8;--danger: #ef4444;--radius: 14px}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:linear-gradient(160deg,#0b1020,#0f1530);color:var(--text);min-height:100vh}.page{max-width:1100px;margin:0 auto;padding:2rem 1.25rem 3rem;display:flex;flex-direction:column;min-height:100vh}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:2rem;margin:0 0 .4rem;background:linear-gradient(90deg,#60a5fa,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}.header p{color:var(--muted);margin:0}.layout{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;flex:1}@media (max-width: 860px){.layout{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);padding:1.5rem}.form{display:flex;flex-direction:column;gap:1rem}.form label{display:flex;flex-direction:column;gap:.4rem;font-size:.9rem;color:var(--muted)}.form input,.form select{background:#0d1329;border:1px solid var(--panel-border);border-radius:8px;padding:.6rem .7rem;color:var(--text);font-size:.95rem}.form input:focus,.form select:focus{outline:none;border-color:var(--accent)}.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.form button{margin-top:.5rem;background:var(--accent);color:#fff;border:none;border-radius:10px;padding:.85rem 1rem;font-size:1rem;font-weight:600;cursor:pointer;transition:background .15s ease}.form button:hover:not(:disabled){background:var(--accent-hover)}.form button:disabled{opacity:.6;cursor:not-allowed}.alert{padding:.7rem .9rem;border-radius:8px;font-size:.9rem}.alert.error{background:#ef44441f;border:1px solid var(--danger);color:#fca5a5}.result{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:300px}.placeholder{color:var(--muted);text-align:center;font-size:.95rem}.progress-wrap{width:100%;display:flex;flex-direction:column;gap:.6rem}.progress-bar{width:100%;height:10px;background:#0d1329;border-radius:999px;overflow:hidden;border:1px solid var(--panel-border)}.progress-fill{height:100%;background:linear-gradient(90deg,#60a5fa,#a78bfa);transition:width .4s ease}.progress-label{text-align:center;color:var(--muted);font-size:.9rem}.video-result{display:flex;flex-direction:column;align-items:center;gap:1rem;width:100%}.preview-video{max-width:100%;max-height:60vh;border-radius:10px;border:1px solid var(--panel-border)}.download-btn{background:var(--accent);color:#fff;text-decoration:none;padding:.7rem 1.2rem;border-radius:10px;font-weight:600;font-size:.95rem}.download-btn:hover{background:var(--accent-hover)}.footer{text-align:center;color:var(--muted);font-size:.8rem;margin-top:2rem}