@import"https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap";:root{--primary-color: #2c3e50;--secondary-color: #27ae60;--background-color: #f5f5f5;--text-color: #333;--header-height: 50px;--border-color: #ddd;--error-color: #e74c3c;--chart-green: rgba(52, 120, 53, .8);--chart-dark-green: rgba(34, 82, 53, .8)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Roboto,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 15px}.btn{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .3s ease}.btn-primary{background-color:var(--secondary-color);color:#fff}.btn-primary:hover{background-color:#219653}.btn-secondary{background-color:#6c757d;color:#fff;margin-left:10px}.btn-secondary:hover{background-color:#5a6268}.ml-2{margin-left:.5rem}.form-group{margin-bottom:20px}.form-control{width:100%;padding:10px;border:1px solid var(--border-color);border-radius:4px;font-size:14px}.error-message{color:var(--error-color);font-size:12px;margin-top:5px}.chart-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(500px,1fr));gap:20px;margin-top:20px}.chart-box{background:#fff;border-radius:8px;box-shadow:0 2px 5px #0000001a;padding:20px}.chart-box h2{margin-bottom:15px;font-size:18px;font-weight:500;color:var(--primary-color)}.chart-wrapper{height:300px;position:relative}.chart-note{font-size:12px;color:#777;margin-top:10px;text-align:center}header{background:var(--primary-color);color:#fff;height:var(--header-height);display:flex;align-items:center;padding:0 20px;box-shadow:0 2px 5px #0000001a}.header-content{display:flex;align-items:center;margin-right:auto}.header-content h3{font-size:16px;font-weight:500}.header-content p{font-size:14px}nav{margin-left:auto}nav ul{display:flex;list-style:none;flex-wrap:wrap}nav li{margin-left:20px}nav a{color:#fff;text-decoration:none;font-size:14px;transition:color .3s ease}nav a:hover{color:var(--secondary-color)}.active{color:var(--secondary-color);font-weight:500}footer{text-align:center;padding:20px;margin-top:40px;color:#777;font-size:14px}.login-container{max-width:400px;margin:100px auto;padding:30px;background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a}.login-container h2{text-align:center;margin-bottom:30px;color:var(--primary-color)}.login-container .form-group{margin-bottom:20px}.login-container button{width:100%;padding:12px;font-size:16px}.historical-container{padding:20px}.date-picker-container{display:flex;gap:20px;margin-bottom:30px;align-items:flex-end}.date-picker-container .form-group{flex:1}.date-picker-container button{height:42px}@media (max-width: 768px){.chart-container{grid-template-columns:1fr}.date-picker-container{flex-direction:column;align-items:stretch}nav ul{justify-content:center;gap:10px;margin-top:5px}nav li{margin:0 10px}header{flex-wrap:wrap;height:auto;padding:10px 20px}.header-content{width:100%;justify-content:center;margin-bottom:10px}nav{width:100%;margin:0}}