:root{--bg-primary: #f5f7fa;--bg-secondary: #ffffff;--bg-card: #ffffff;--text-primary: #333333;--text-secondary: #7f8c8d;--text-header: #2c3e50;--border-color: #e1e8ed;--shadow-sm: rgba(0, 0, 0, .1);--shadow-md: rgba(0, 0, 0, .15)}[data-theme=dark]{--bg-primary: #1a1d23;--bg-secondary: #22262e;--bg-card: #2a2f3a;--text-primary: #e4e6eb;--text-secondary: #b0b3b8;--text-header: #e4e6eb;--border-color: #3a3f4b;--shadow-sm: rgba(0, 0, 0, .3);--shadow-md: rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}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:var(--bg-primary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}#root{min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:20px}.card{background:var(--bg-card);border-radius:8px;padding:24px;box-shadow:0 2px 8px var(--shadow-sm);margin-bottom:20px;transition:background-color .3s ease,box-shadow .3s ease}.card-header{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--text-header)}.btn{padding:10px 20px;border:none;border-radius:6px;font-size:14px;cursor:pointer;transition:all .3s ease;font-weight:500}.btn-primary{background:#3498db;color:#fff}.btn-primary:hover{background:#2980b9}.btn-success{background:#27ae60;color:#fff}.btn-success:hover{background:#229954}.btn-danger{background:#e74c3c;color:#fff}.btn-danger:hover{background:#c0392b}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;color:var(--text-primary)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:14px;background:var(--bg-secondary);color:var(--text-primary);transition:border-color .3s ease,background-color .3s ease}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:#3498db}.table{width:100%;border-collapse:collapse;margin-top:16px}.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid var(--border-color)}.table th{background:var(--bg-secondary);font-weight:600;color:var(--text-primary)}.table tbody tr:hover{background:var(--bg-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:30px}.stat-card{background:var(--bg-card);padding:24px;border-radius:8px;box-shadow:0 2px 8px var(--shadow-sm);transition:background-color .3s ease,box-shadow .3s ease}.stat-label{font-size:14px;color:var(--text-secondary);margin-bottom:8px}.stat-value{font-size:28px;font-weight:700;color:#2c3e50}.stat-unit{font-size:14px;color:#95a5a6;margin-left:4px}.error-message{background:#fee;color:#c33;padding:12px;border-radius:6px;margin-bottom:16px}.success-message{background:#efe;color:#3c3;padding:12px;border-radius:6px;margin-bottom:16px}.loading{text-align:center;padding:40px;color:#7f8c8d}.navbar{background:var(--bg-card);box-shadow:0 2px 4px var(--shadow-sm);padding:0 20px;transition:background-color .3s ease,box-shadow .3s ease}.navbar-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;height:64px}.navbar-brand{font-size:20px;font-weight:700;color:var(--text-header)}.navbar-nav{display:flex;gap:20px;align-items:center}.nav-link{text-decoration:none;color:#555;font-weight:500;transition:color .3s ease}.nav-link:hover,.nav-link.active{color:#3498db}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.login-card{background:#fff;padding:40px;border-radius:12px;box-shadow:0 10px 30px #0003;width:100%;max-width:400px}.login-title{font-size:24px;font-weight:700;text-align:center;margin-bottom:30px;color:#2c3e50}@media (max-width: 768px){.stats-grid{grid-template-columns:1fr}.navbar-content{flex-direction:column;height:auto;padding:16px 0}.navbar-nav{margin-top:12px}.table{font-size:12px}}