:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#e0e7f5;--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:94%;margin:100px auto;background:#fff;border-radius:12px;box-shadow:var(--card-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{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-primary{background-color:var(--primary);color:#fff}
.main-content .btn-primary:hover{background-color:var(--primary-hover)}
.main-content .btn-secondary{background-color:var(--secondary);color:#fff;border:1px solid var(--border)}
.main-content .btn-secondary:hover{background-color:#e5e7eb}
.main-content .btn-danger{background-color:var(--error);color:#fff}
.main-content .btn-danger:hover{background-color:#dc2626}
.main-content .btn-warning{background-color:var(--warning);color:#fff}
.main-content .btn-warning:hover{background-color:#d97706}
input[type="checkbox"]:checked + label {color: unset;}
#file{display:none}
.file-info{display:none;text-align:center;margin:20px 0;padding:16px;background-color:var(--bg-light);border-radius:8px;border:1px solid #dadde4}
.file-info-icon{font-size:48px;color:var(--success);margin-bottom:12px}
.file-info-content{display:flex;flex-direction:column;align-items:center;gap:8px}
.file-name{font-weight:700;font-size:17px}
.file-size{color:var(--text-light);font-size:15px}
.file-pages{color:var(--text-light);font-size:15px}
.options-section{display:none;margin:24px 0;padding:24px;background-color:var(--bg-light);border-radius:12px;1px solid #dadde4}
.options-title{font-size:20px;font-weight:600;margin-bottom:16px;color:var(--text)}
.option-group{margin-bottom:20px}
.option-label{display:block;margin-bottom:8px;font-weight:500;color:var(--text)}
.option-description{font-size:14px;color:var(--text-light);margin-bottom:12px}
.radio-group{display:flex;gap:20px;margin-bottom:12px}
.radio-option{display:flex;align-items:center;gap:8px}
.radio-option input{margin:0}
.range-input{width:100%;margin-bottom:8px}
.range-labels{display:flex;justify-content:space-between;font-size:14px;color:var(--text-light)}
.page-preview{width:100%;height:auto;max-height:500px;border:1px solid var(--border);border-radius:8px;overflow:auto;background-color:#fff;margin-top:16px;position:relative;padding:10px}
.page-thumbnails{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.page-thumbnail{border:1px solid var(--border);border-radius:4px;overflow:hidden;position:relative;cursor:pointer;background-color:#f0f0f0;display:flex;flex-direction:column}
.page-thumbnail.selected{border:2px solid var(--primary)}
.page-number{background-color:#000000b3;color:#fff;text-align:center;padding:4px;font-size:14px}
.thumbnail-canvas{flex-grow:1;display:flex;justify-content:center;align-items:center;overflow:hidden}
.action-buttons{display:none;justify-content:center;gap:15px;margin-top:20px;flex-wrap:wrap}
.loading-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;z-index:1000;justify-content:center;align-items:center}
.loading-spinner{border:5px solid #f3f3f3;border-top:5px solid var(--primary);border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite}
@keyframes spin {
0%{transform:rotate(0deg)}
100%{transform:rotate(360deg)}
}
@media (max-width: 768px) {
.container{margin:20px auto;border-radius:0}
.main-content{padding:16px}
.upload-section{padding:24px}
.radio-group{flex-direction:column;gap:10px}
}
input[type="range"]{-webkit-appearance:none;width:100%;height:8px;border-radius:4px;background:var(--border);outline:none;margin:15px 0}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer}
input[type="range"]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer}
.checkbox-option{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.checkbox-option input{width:18px;height:18px}
.toast{position:fixed;bottom:20px;right:20px;padding:16px 24px;background-color:var(--text);color:#fff;border-radius:8px;box-shadow:var(--page-shadow);display:flex;align-items:center;gap:12px;transform:translateY(100px);opacity:0;transition:all .3s ease;z-index:1001}
.toast.show{transform:translateY(0);opacity:1}
.toast-success{background-color:var(--success)}
.toast-error{background-color:var(--error)}
.toast-icon{font-size:18px}