*{margin:0;padding:0;box-sizing:border-box}body{font-family:system-ui,-apple-system,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.app{min-height:100vh}.navbar{background:#fffffff2;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 10px #0000001a}.nav-brand{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-status{background:#e0e0e0;padding:.25rem .75rem;border-radius:20px;font-size:.875rem}.main-content{max-width:1200px;margin:0 auto;padding:2rem}.toolbar{display:flex;gap:1rem;margin-bottom:2rem}.btn{padding:.75rem 1.5rem;background:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:600;transition:all .2s}.btn.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem}.file-card{background:#fff;border-radius:12px;padding:1rem;text-align:center;cursor:pointer;transition:all .2s;position:relative}.file-card:hover{transform:translateY(-4px);box-shadow:0 4px 20px #00000026}.icon-large{font-size:3rem;margin-bottom:.5rem}.file-name{font-size:.75rem;word-break:break-all;color:#333}.delete-btn{position:absolute;top:.5rem;right:.5rem;background:#00000080;border:none;border-radius:4px;color:#fff;cursor:pointer;padding:.25rem .5rem;opacity:0;transition:opacity .2s}.file-card:hover .delete-btn{opacity:1}.empty{text-align:center;padding:3rem;color:#fff;background:#ffffff1a;border-radius:12px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000}.preview-modal{background:#fff;border-radius:12px;max-width:90vw;max-height:90vh;display:flex;flex-direction:column;overflow:hidden}.preview-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;border-bottom:1px solid #eee}.close-btn{background:none;border:none;font-size:1.5rem;cursor:pointer}.preview-content{flex:1;overflow:auto;padding:1rem;display:flex;justify-content:center;align-items:center;background:#f5f5f5}.preview-image{max-width:100%;max-height:70vh;object-fit:contain}.preview-video{max-width:100%;max-height:70vh}.preview-audio{width:100%}.preview-pdf{width:100%;height:70vh;border:none}.preview-text{width:100%;max-height:70vh;overflow:auto;background:#2d2d2d;color:#f5f5f5;padding:1rem;border-radius:8px;font-family:monospace;font-size:.75rem;white-space:pre-wrap}.preview-footer{padding:1rem;border-top:1px solid #eee;display:flex;justify-content:flex-end}.download-btn{padding:.5rem 1rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;text-decoration:none;border-radius:8px}