:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--danger: #dc2626;--danger-light: #fee2e2;--success: #16a34a;--success-light: #dcfce7;--warning: #d97706;--warning-light: #fef3c7;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--sidebar-w: 240px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;color:var(--gray-800);background:var(--gray-50)}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--gray-900);color:#fff;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;overflow-y:auto}.sidebar-logo{padding:20px 16px;font-size:18px;font-weight:700;border-bottom:1px solid var(--gray-700);display:flex;align-items:center;gap:10px}.sidebar-logo span{color:var(--primary)}.sidebar-nav{flex:1;padding:8px 0}.nav-section{padding:8px 16px 4px;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--gray-400);margin-top:8px}.nav-item{display:flex;align-items:center;gap:10px;padding:8px 16px;color:var(--gray-300);cursor:pointer;transition:all .15s;font-size:13px;border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--gray-700);color:#fff}.nav-item.active{background:var(--primary-dark);color:#fff}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--gray-700);font-size:12px;color:var(--gray-400)}.main-content{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column}.topbar{height:56px;background:#fff;border-bottom:1px solid var(--gray-200);display:flex;align-items:center;justify-content:space-between;padding:0 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12px;font-size:12px;font-weight:600;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em;border-bottom:2px solid var(--gray-200)}td{padding:10px 12px;border-bottom:1px solid var(--gray-100);font-size:13px}tr:hover td{background:var(--gray-50)}.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:600;text-transform:uppercase}.badge-open{background:var(--primary-light);color:var(--primary-dark)}.badge-in_progress,.badge-investigating{background:var(--warning-light);color:var(--warning)}.badge-resolved,.badge-completed,.badge-closed{background:var(--success-light);color:var(--success)}.badge-escalated,.badge-critical,.badge-emergency{background:var(--danger-light);color:var(--danger)}.badge-high{background:#fef2f2;color:#b91c1c}.badge-medium{background:#fffbeb;color:#92400e}.badge-low{background:#f0fdf4;color:#166534}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;border:1px solid var(--gray-300);background:#fff;color:var(--gray-700);transition:all .15s}.btn:hover{background:var(--gray-50)}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-dark)}.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}.btn-sm{padding:4px 10px;font-size:12px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:var(--gray-700)}.form-input,.form-select,.form-textarea{width:100%;padding:8px 12px;border:1px solid var(--gray-300);border-radius:6px;font-size:14px;color:var(--gray-800);background:#fff;transition:border-color .15s}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-textarea{min-height:100px;resize:vertical;font-family:inherit}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:#fff;border-radius:12px;padding:24px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto}.modal-title{font-size:18px;font-weight:600;margin-bottom:16px}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:20px}.toast{position:fixed;bottom:20px;right:20px;padding:12px 20px;border-radius:8px;color:#fff;font-size:13px;z-index:999;animation:slideIn .3s ease}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}@keyframes slideIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.loading{text-align:center;padding:40px;color:var(--gray-400)}.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--gray-200);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:48px 24px;color:var(--gray-400)}.empty-state h3{font-size:16px;color:var(--gray-500);margin-bottom:8px}.detail-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:20px}.detail-meta{display:flex;gap:16px;flex-wrap:wrap;margin-top:8px}.detail-meta-item{font-size:12px;color:var(--gray-500)}.detail-meta-item strong{color:var(--gray-700)}.timeline{border-left:2px solid var(--gray-200);margin-left:12px;padding-left:20px}.timeline-item{margin-bottom:16px;position:relative}.timeline-item:before{content:"";position:absolute;left:-26px;top:4px;width:10px;height:10px;border-radius:50%;background:var(--primary);border:2px solid 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