:root{--bg-base: #0d0d12;--bg-surface: #16161e;--bg-elevated: #1e1e2a;--bg-glass: rgba(255, 255, 255, .04);--bg-glass-hover: rgba(255, 255, 255, .07);--accent: #6c63ff;--accent-light: #8b85ff;--accent-glow: rgba(108, 99, 255, .35);--accent-gradient: linear-gradient(135deg, #6c63ff 0%, #a78bfa 100%);--success: #22d3a0;--success-bg: rgba(34, 211, 160, .12);--error: #f87171;--error-bg: rgba(248, 113, 113, .12);--warning: #fbbf24;--text-primary: #f0f0f8;--text-secondary: #9898b0;--text-muted: #5a5a72;--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .14);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-xl: 28px;--shadow-md: 0 4px 24px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 48px rgba(0, 0, 0, .6);--shadow-accent: 0 0 40px var(--accent-glow);--transition: .22s cubic-bezier(.4, 0, .2, 1);--font: "Inter", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg-base);color:var(--text-primary);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;inset:0;background-image:linear-gradient(rgba(108,99,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(108,99,255,.04) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;z-index:0}#app{position:relative;z-index:1}.page-center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.app-layout{display:flex;min-height:100vh}.sidebar{width:240px;flex-shrink:0;background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:28px 0}.sidebar-logo{padding:0 24px 32px;display:flex;align-items:center;gap:10px}.sidebar-logo .logo-icon{width:36px;height:36px;background:var(--accent-gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:var(--shadow-accent)}.sidebar-logo span{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-nav{flex:1;display:flex;flex-direction:column;gap:4px;padding:0 12px}.nav-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:all var(--transition);border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--bg-glass-hover);color:var(--text-primary)}.nav-item.active{background:rgba(108,99,255,.15);color:var(--accent-light)}.nav-item .nav-icon{font-size:1.1rem}.sidebar-footer{padding:12px}.version-info{display:flex;flex-direction:column;gap:2px;padding:8px 14px 10px;font-size:.72rem;color:var(--text-muted);border-top:1px solid var(--border);margin-bottom:4px}.version-info code{font-family:Courier New,monospace;font-size:.72rem;color:var(--accent-light)}.main-content{flex:1;padding:40px;overflow-y:auto}.page-header{margin-bottom:36px}.page-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.03em;margin-bottom:6px}.page-header p{color:var(--text-secondary);font-size:.95rem}.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-md)}.card+.card{margin-top:24px}.card-title{font-size:1rem;font-weight:600;margin-bottom:20px;color:var(--text-primary);display:flex;align-items:center;gap:8px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:.85rem;font-weight:500;color:var(--text-secondary);margin-bottom:8px;letter-spacing:.02em;text-transform:uppercase}.form-control{width:100%;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;color:var(--text-primary);font-family:var(--font);font-size:.95rem;transition:border-color var(--transition),box-shadow var(--transition);outline:none}.form-control:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-control::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-family:var(--font);font-size:.9rem;font-weight:600;cursor:pointer;border:none;transition:all var(--transition);letter-spacing:.01em;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 20px var(--accent-glow)}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 30px var(--accent-glow)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-ghost{background:var(--bg-glass);color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg-glass-hover);color:var(--text-primary)}.btn-block{width:100%}.alert{padding:14px 18px;border-radius:var(--radius-sm);font-size:.9rem;display:flex;align-items:flex-start;gap:10px;line-height:1.5}.alert-error{background:var(--error-bg);border:1px solid rgba(248,113,113,.25);color:var(--error)}.alert-success{background:var(--success-bg);border:1px solid rgba(34,211,160,.25);color:var(--success)}.login-card{width:100%;max-width:420px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px 40px;box-shadow:var(--shadow-lg),var(--shadow-accent)}.login-logo{text-align:center;margin-bottom:36px}.login-logo .logo-badge{width:64px;height:64px;background:var(--accent-gradient);border-radius:var(--radius-md);display:inline-flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:16px;box-shadow:var(--shadow-accent)}.login-logo h1{font-size:1.5rem;font-weight:700;letter-spacing:-.03em}.login-logo p{color:var(--text-secondary);font-size:.9rem;margin-top:4px}.transfer-box{position:relative}.url-input-wrap{display:flex;gap:12px;align-items:flex-start}.url-input-wrap .form-control{flex:1;padding:14px 18px;font-size:1rem}.progress-wrap{margin-top:24px}.progress-bar-bg{height:6px;background:var(--bg-elevated);border-radius:99px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent-gradient);border-radius:99px;transition:width .4s ease}.progress-label{display:flex;justify-content:space-between;font-size:.82rem;color:var(--text-secondary);margin-top:8px}.history-list{display:flex;flex-direction:column;gap:12px}.history-item{display:flex;align-items:center;gap:16px;padding:14px 18px;background:var(--bg-elevated);border-radius:var(--radius-sm);border:1px solid var(--border)}.history-item .file-icon{font-size:1.4rem;flex-shrink:0}.history-item .file-info{flex:1;min-width:0}.history-item .file-name{font-size:.9rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item .file-meta{font-size:.8rem;color:var(--text-muted);margin-top:2px}.badge{font-size:.75rem;font-weight:600;padding:3px 10px;border-radius:99px}.badge-success{background:var(--success-bg);color:var(--success)}.badge-error{background:var(--error-bg);color:var(--error)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}@media (max-width: 640px){.settings-grid{grid-template-columns:1fr}.main-content{padding:20px}.sidebar{display:none}}.spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.2);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.hint{font-size:.8rem;color:var(--text-muted);margin-top:6px}.divider{height:1px;background:var(--border);margin:24px 0}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fadeUp .45s ease both}