.app{display:flex;min-height:100vh;background-color:var(--light-bg)}.sidebar{width:250px;background:linear-gradient(180deg,#2c3e50,#34495e);color:#fff;padding:0;box-shadow:var(--shadow-lg);position:fixed;height:100vh;overflow-y:auto;overflow-x:hidden;z-index:1000;transition:width .25s ease;display:flex;flex-direction:column}.sidebar-collapsed{width:60px}.sidebar-header{padding:1.25rem 1rem;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;gap:.75rem;background:#0000001a;white-space:nowrap;overflow:hidden}.sidebar-header .logo-icon{color:#3498db;flex-shrink:0}.sidebar-header h1{font-size:1.75rem;font-weight:700;margin:0;color:#fff;opacity:1;transition:opacity .2s ease}.sidebar-collapsed .sidebar-header h1{opacity:0;width:0;overflow:hidden}.nav-menu{list-style:none;padding:1rem 0;margin:0}.nav-menu li{margin:0}.nav-menu li a{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;color:#fffc;text-decoration:none;transition:all .3s ease;border-left:4px solid transparent;font-weight:500;white-space:nowrap;overflow:hidden}.nav-icon{flex-shrink:0}.nav-menu li a:hover{background:#ffffff1a;color:#fff;border-left-color:#3498db}.nav-menu li.active a{background:#3498db33;color:#fff;border-left-color:#3498db;font-weight:600}.main-content{flex:1;margin-left:250px;padding:2rem;min-height:100vh;background-color:var(--light-bg);transition:margin-left .25s ease;min-width:0}.sidebar-is-collapsed .main-content{margin-left:60px}.page-container{max-width:1400px;width:100%;margin:0 auto}.box{background:#fff;border-radius:8px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.box-title{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem;padding-bottom:.75rem;border-bottom:2px solid var(--primary-color)}.btn{display:inline-block;padding:.5rem 1.25rem;font-size:1rem;font-weight:500;line-height:1.5;text-align:center;text-decoration:none;white-space:nowrap;vertical-align:middle;cursor:pointer;border:1px solid transparent;border-radius:.375rem;transition:all .15s ease-in-out;-webkit-user-select:none;user-select:none}.btn:disabled{opacity:.65;cursor:not-allowed}.btn-primary{color:#fff;background-color:var(--primary-color);border-color:var(--primary-color)}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover)}.btn-secondary{color:#fff;background-color:var(--secondary-color);border-color:var(--secondary-color)}.btn-secondary:hover:not(:disabled){background-color:var(--secondary-hover);border-color:var(--secondary-hover)}.btn-success{color:#fff;background-color:var(--success-color);border-color:var(--success-color)}.btn-success:hover:not(:disabled){background-color:var(--success-hover);border-color:var(--success-hover)}.btn-danger{color:#fff;background-color:var(--danger-color);border-color:var(--danger-color)}.btn-danger:hover:not(:disabled){background-color:var(--danger-hover);border-color:var(--danger-hover)}.btn-info{color:#fff;background-color:var(--info-color);border-color:var(--info-color)}.btn-info:hover:not(:disabled){background-color:#138496;border-color:#117a8b}.form-group{margin-bottom:1rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-primary)}.form-input,.form-select,.form-textarea{display:block;width:100%;padding:.5rem .75rem;font-size:1rem;line-height:1.5;color:var(--text-primary);background-color:#fff;border:1px solid var(--border-color);border-radius:.375rem;transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:#80bdff;box-shadow:0 0 0 .2rem #007bff40}.form-textarea{resize:vertical;min-height:100px}.file-input-wrapper{position:relative;display:inline-block;width:100%}.file-input-wrapper input[type=file]{position:absolute;opacity:0;width:100%;height:100%;cursor:pointer}.file-input-label{display:block;padding:.5rem .75rem;background-color:#fff;border:1px solid var(--border-color);border-radius:.375rem;cursor:pointer;text-align:center;transition:all .15s ease-in-out}.file-input-label:hover{background-color:var(--light-bg)}.alert{padding:.75rem 1.25rem;margin-bottom:1rem;border:1px solid transparent;border-radius:.375rem}.alert-info{color:#004085;background-color:#cce5ff;border-color:#b8daff}.alert-success{color:#155724;background-color:#d4edda;border-color:#c3e6cb}.alert-warning{color:#856404;background-color:#fff3cd;border-color:#ffeaa7}.alert-danger{color:#721c24;background-color:#f8d7da;border-color:#f5c6cb}.spinner{display:inline-block;width:1rem;height:1rem;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spinner-border .75s linear infinite}@keyframes spinner-border{to{transform:rotate(360deg)}}.spinner-lg{width:2rem;height:2rem;border-width:3px}.text-center{text-align:center}.text-muted{color:var(--text-secondary)}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:1rem}.mb-4{margin-bottom:1.5rem}.gap-2{gap:.5rem}.gap-3{gap:1rem}.d-flex{display:flex}.align-items-center{align-items:center}.justify-content-between{justify-content:space-between}.sidebar-toggle{position:fixed;top:50%;left:250px;transform:translate(-50%,-50%);z-index:1001;display:flex;align-items:center;justify-content:center;width:20px;height:48px;background:#34495e;border:1px solid rgba(255,255,255,.25);border-radius:0 6px 6px 0;color:#ffffffd9;cursor:pointer;transition:left .25s ease,background .2s ease,color .2s ease;padding:0;box-shadow:2px 0 6px #0003}.sidebar-toggle:hover{background:#3d566e;color:#fff}.sidebar-collapsed .sidebar-toggle{left:60px}@media (max-width: 768px){.sidebar{width:200px}.main-content{margin-left:200px;padding:1rem}}@media (max-width: 576px){.sidebar{width:100%;height:auto;position:relative}.main-content{margin-left:0}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #007bff;--primary-hover: #0056b3;--secondary-color: #6c757d;--secondary-hover: #5a6268;--success-color: #28a745;--success-hover: #218838;--danger-color: #dc3545;--danger-hover: #c82333;--warning-color: #ffc107;--info-color: #17a2b8;--light-bg: #f8f9fa;--border-color: #dee2e6;--text-primary: #212529;--text-secondary: #6c757d;--shadow-sm: 0 .125rem .25rem rgba(0,0,0,.075);--shadow-md: 0 .5rem 1rem rgba(0,0,0,.15);--shadow-lg: 0 1rem 3rem rgba(0,0,0,.175)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--light-bg);color:var(--text-primary);line-height:1.6}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#888;border-radius:5px}::-webkit-scrollbar-thumb:hover{background:#555}