:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#f3f4f6;--text:#111827;--text-light:#6b7280;--border:#bdc9e1;--bg-light:#f9fafb;--error:#ef4444;--success:#10b981;--warning:#f59e0b;--card-shadow:0 4px 6px #0000000d;--page-shadow:0 2px 4px #0000001a}
.containert{max-width:1200px;margin:100px auto;background:#fff;border-radius:16px;box-shadow:var(--page-shadow);overflow:hidden}
.main-content{padding:6px;}
.upload-section{text-align:center;padding:48px;border:2px dashed var(--border);border-radius:12px;background-color:var(--bg-light);transition:all .3s ease;margin-bottom:24px;position:relative}
.upload-section.active{border-color:var(--primary);background-color:#4f46e50d}
.upload-icon{font-size:56px;color:var(--primary);margin-bottom:20px}
.upload-text{font-size:18px;color:var(--text);margin-bottom:12px;font-weight:500}
.upload-hint{font-size:14px;color:var(--text-light);margin-bottom:24px}
.main-content .btn-upload{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;background-color:var(--primary);color:#fff;border:none;outline:none;font-size:15px;gap:10px}
.main-content .btn-upload:hover{background-color:var(--primary-hover)}
#pdf-upload{display:none}
.files-list{display:none;margin:24px 0;border-radius:12px;overflow:hidden;border:1px solid var(--border)}
.file-item{display:flex;align-items:center;padding:16px;background-color:#fff;border-bottom:1px solid var(--border);transition:all .2s ease}
.file-item:last-child{border-bottom:none}
.file-item:hover{background-color:var(--bg-light)}
.file-icon{font-size:24px;color:var(--error);margin-right:16px}
.file-info{flex:1;min-width:0}
.file-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-size{font-size:14px;color:var(--text-light)}
.file-actions{display:flex;gap:8px}
.file-action-btn{background:none;border:none;color:var(--text-light);cursor:pointer;transition:all .2s ease;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.file-action-btn:hover{background-color:var(--secondary);color:var(--text)}
.file-action-btn.move{cursor:move}
.options-section{display:none;margin:24px 0;padding:24px;background-color:var(--bg-light);border-radius:12px;border:1px solid var(--border)}
.options-title{font-size:17px;font-weight:600;margin-bottom:16px;color:var(--primary)}
.option-group{margin-bottom:20px}
.option-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text)}
.option-group select,.option-group input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background-color:#fff;font-size:15px}
.checkbox-group{display:none;align-items:center;margin-bottom:12px}
.checkbox-group input{margin-right:10px}
.action-buttons{display:none;justify-content:center;gap:16px;margin-top:24px}
.main-content .btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;border:none;outline:none;font-size:16px;gap:8px}
.main-content .btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;border:none;outline:none;font-size:15px;gap:5px;min-width: 225px;}
.main-content .btn-primary{background-color:var(--primary);color:#fff}
.main-content .btn-primary:hover{background-color:var(--primary-hover)}
.main-content .btn-secondary{background-color:#495057;color:#fff}
.main-content .btn-secondary:hover{background-color:#757575}
.main-content .btn-success{background-color:#1eb740;color:#fff}
.main-content .btn-success:hover{background-color:#0d9f6e}
.loading{display:none;margin:24px 0;text-align:center;color:var(--primary)}
.loading-spinner{animation:spin 1s linear infinite;font-size:24px}
.toast{position:fixed;bottom:20px;right:20px;padding:16px 24px;border-radius:8px;background-color:var(--primary);color:#fff;font-weight:500;box-shadow:0 4px 12px #00000026;transform:translateY(100px);opacity:0;transition:all .3s ease;z-index:1000}
.toast.show{transform:translateY(0);opacity:1}
.toast.error{background-color:var(--error)}
.toast.warning{background-color:var(--warning)}
@keyframes spin {
0%{transform:rotate(0deg)}
100%{transform:rotate(360deg)}
}
@media (max-width: 768px) {
.container{margin:20px auto;border-radius:0}
.main-content{padding:20px}
.upload-section{padding:30px 20px}
.file-item{flex-direction:column;align-items:flex-start}
.file-actions{margin-top:12px;align-self:flex-end}
}