:root{--bg-primary: #0f0f23;--bg-secondary: #1a1a2e;--bg-tertiary: #16213e;--accent-primary: #6c63ff;--accent-secondary: #4a44b5;--text-primary: #e2e8f0;--text-secondary: #a0aec0;--text-muted: #718096;--border-color: #2d3748;--success: #48bb78;--error: #f56565;--warning: #ed8936}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%);background-attachment:fixed;color:var(--text-primary);font-family:Segoe UI,system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}.app-container{min-height:100vh;padding:20px}.upload-container,.download-container{max-width:600px;margin:0 auto;background:var(--bg-secondary);border-radius:16px;padding:32px;box-shadow:0 8px 32px #0000004d;border:1px solid var(--border-color)}.header{text-align:center;margin-bottom:32px}.header h2{font-size:clamp(24px,4vw,28px);font-weight:700;background:linear-gradient(135deg,var(--accent-primary),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.header p{color:var(--text-secondary);font-size:clamp(14px,2vw,16px)}.drop-zone{border:2px dashed var(--border-color);border-radius:12px;padding:clamp(24px,6vw,48px) clamp(16px,4vw,32px);text-align:center;transition:all .3s ease;background:var(--bg-tertiary);cursor:pointer;margin-bottom:24px;touch-action:manipulation}.drop-zone:hover,.drop-zone:focus-within{border-color:var(--accent-primary);background:#6c63ff0d}.drop-zone.drag-over{border-color:var(--accent-primary);background:#6c63ff1a;transform:scale(1.02)}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:16px}.drop-zone-icon{font-size:clamp(32px,6vw,48px);color:var(--accent-primary)}.form-group{margin-bottom:20px}.form-label{display:block;margin-bottom:8px;color:var(--text-primary);font-weight:500;font-size:14px}.form-input{width:100%;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-size:16px;transition:all .3s ease}.form-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #6c63ff1a}.btn{padding:12px 24px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px;touch-action:manipulation;position:relative;overflow:hidden}.btn:active{transform:scale(.98)}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;width:100%}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 25px #6c63ff4d}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--accent-primary);color:#fff}.status{padding:16px;border-radius:8px;margin:16px 0;text-align:center;font-weight:500}.status-loading{background:#ed89361a;color:var(--warning);border:1px solid var(--warning)}.status-success{background:#48bb781a;color:var(--success);border:1px solid var(--success)}.status-error{background:#f565651a;color:var(--error);border:1px solid var(--error)}.share-link{background:var(--bg-tertiary);border:1px solid var(--success);border-radius:12px;padding:20px;margin-top:20px;transition:all .3s ease;box-shadow:0 4px 20px #48bb7833}.share-link:hover{transform:translateY(-2px);box-shadow:0 6px 25px #48bb784d}.metadata{background:var(--bg-tertiary);border-radius:8px;padding:20px;margin:20px 0;border:1px solid var(--border-color)}.metadata-item{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--border-color)}.metadata-item:last-child{border-bottom:none}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes linkFlash{0%{box-shadow:0 0 #6c63ffb3}70%{box-shadow:0 0 0 10px #6c63ff00}to{box-shadow:0 0 #6c63ff00}}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top:3px solid var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto}.share-link-highlight{animation:linkFlash 2s ease-in-out}.file-info{background:var(--bg-tertiary);border-radius:8px;padding:16px;margin-top:16px;border:1px solid var(--border-color)}@media(max-width:768px){.app-container{padding:16px}.upload-container,.download-container{padding:24px 20px}.drop-zone{padding:32px 16px}.btn{padding:14px 20px}}@media(max-width:480px){.metadata-item{flex-direction:column;align-items:flex-start;gap:4px}}.password-strength-meter{margin-top:8px}.strength-bars{display:flex;gap:2px;height:6px;margin-bottom:8px}.strength-bar{flex:1;background:var(--border-color);border-radius:3px;transition:all .3s ease}.strength-bar.active{background:currentColor}.strength-info{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-secondary)}.password-requirements{margin-top:8px}.requirement-item{display:flex;align-items:center;font-size:11px;margin-bottom:2px;transition:color .3s ease}.requirement-item.met{color:var(--success)}.requirement-item.unmet{color:var(--text-muted)}.password-input-container{position:relative}.password-input-container .form-input{padding-right:50px!important}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all .2s ease;font-size:20px}.password-toggle:hover:not(:disabled){color:var(--text-primary);background:#6c63ff1a}.password-toggle:disabled{opacity:.5;cursor:not-allowed}.toggle-container{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;padding:16px}.toggle-label{display:flex;justify-content:space-between;align-items:flex-start;cursor:pointer;gap:16px}.toggle-text{flex:1}.toggle-text strong{display:block;color:var(--text-primary);margin-bottom:4px}.toggle-description{display:block;font-size:12px;color:var(--text-secondary);line-height:1.4}.toggle-switch{position:relative;width:50px;height:24px;flex-shrink:0}.toggle-input{opacity:0;width:0;height:0;position:absolute}.toggle-slider{position:absolute;cursor:pointer;inset:0;background-color:var(--border-color);transition:.4s;border-radius:24px}.toggle-slider:before{position:absolute;content:"";height:16px;width:16px;left:4px;bottom:4px;background-color:#fff;transition:.4s;border-radius:50%}.toggle-input:checked+.toggle-slider{background-color:var(--accent-primary)}.toggle-input:checked+.toggle-slider:before{transform:translate(26px)}.toggle-input:focus+.toggle-slider{box-shadow:0 0 0 3px #6c63ff1a}@media(max-width:480px){.toggle-label{flex-direction:column;align-items:flex-start;gap:12px}.toggle-switch{align-self:flex-start}}.auto-download-banner{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-radius:12px;margin-bottom:20px;overflow:hidden;box-shadow:0 4px 15px #667eea4d}.auto-download-content{display:flex;align-items:center;padding:16px 20px;gap:12px}.auto-download-icon{font-size:24px;flex-shrink:0}.auto-download-text{flex:1}.auto-download-progress{height:4px;background:linear-gradient(90deg,#4cd964,#5ac8fa);transition:width 1s linear}.btn-sm{padding:8px 16px;font-size:14px;border-radius:6px}.btn-secondary{background:#fff3;border:1px solid rgba(255,255,255,.3)}@keyframes spin{0%{transform:translateY(-50%) rotate(0)}to{transform:translateY(-50%) rotate(360deg)}}