<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1a2a6c, #004d40);
            min-height: 100vh;
            justify-content: center;
            align-items: center;
            color: #333;
        }
.description{    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 20px;
    line-height: 1.6;
}
h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
}
.sub-header {
    background: linear-gradient(to right, #2575fc, #6a11cb);
    color: white;
    padding: 30px 40px;
    text-align: center;
	border-radius: 15px;
    margin-bottom: 20px;
}           
        .container {
            width: 100%;
            max-width: 1000px;
        }
        
        header {
            text-align: center;
            color: white;
            margin-bottom: 50px;
        }
        
        header h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .calculator-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
            overflow: hidden;
			margin-bottom:30px;
        }
        
        .calculator-tabs {
            display: flex;
            background: linear-gradient(to right, #4361ee, #4cc9f0);
        }
        
        .tab {
            flex: 1;
            padding: 15px;
            text-align: center;
            color: white;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .tab.active {
            background: rgba(255, 255, 255, 0.2);
            border-bottom: 3px solid white;
        }
        
        .tab-content {
            padding: 30px;
        }
        
        .tab-pane {
            display: none;
        }
        
        .tab-pane.active {
            display: block;
            animation: fadeIn 0.5s;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        .section-title {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: #2575fc;
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        
        .section-title i {
            color: #4cc9f0;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #444;
            font-size: 1.1rem;
        }
        
        .input-group {
            display: flex;
            align-items: center;
            border: 2px solid #ddd;
            border-radius: 8px;
            overflow: hidden;
            background: white;
        }
        
        .input-group i {
            padding: 0 15px;
            color: #666;
            background: #f5f5f5;
            height: 50px;
            display: flex;
            align-items: center;
            border-right: 2px solid #ddd;
        }
        
        .input-group input, .input-group select {
            width: 100%;
            padding: 12px 15px;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        
        .input-group input:focus, .input-group select:focus {
            background: #f9f9f9;
        }
        
        .time-row {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .time-input {
            flex: 1;
        }
        
        .operation-row {
            display: flex;
            justify-content: center;
            margin: 20px 0;
        }
        
        .operation-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #1a2a6c;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .operation-btn:hover {
            background: #004d40;
            transform: scale(1.1);
        }
        
        .btn {
            width: 100%;
            padding: 15px;
            background: linear-gradient(to right, #2575fc, #6a11cb);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            margin-top: 10px;
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }
        
        .btn:active {
            transform: translateY(0);
        }
        
        .result-display {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            text-align: center;
            margin: 25px 0;
            border: 1px solid #e0e0e0;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }
        
        .result-display .label {
            font-size: 1.3rem;
            color: #1a2a6c;
            margin-bottom: 10px;
        }
        
        .result-display .value {
            font-size: 2.5rem;
            font-weight: bold;
            color: #004d40;
            margin: 10px 0;
        }
        
        .conversion-row {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .conversion-group {
            flex: 1;
        }
        
        .time-units {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 10px;
            margin-top: 20px;
        }
        
        .unit-card {
            padding: 15px;
            background: #f8f9fa;
            border-radius: 8px;
            text-align: center;
            border: 1px solid #e0e0e0;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }
        
        .unit-card .value {
            font-size: 1.4rem;
            font-weight: bold;
            color: #1a2a6c;
            margin: 5px 0;
        }
        
        .unit-card .label {
            font-size: 0.9rem;
            color: #666;
        }
        
        .disclaimer {
            background: rgba(26, 42, 108, 0.1);
            color: #555;
            padding: 15px;
            border-radius: 8px;
            font-size: 0.9rem;
            line-height: 1.6;
            margin-top: 25px;
            border-left: 4px solid #1a2a6c;
        }
        
        @media (max-width: 768px) {
            header h1 {
                font-size: 2.2rem;
            }
            
            .result-display .value {
                font-size: 2rem;
            }
            
            .calculator-tabs {
                flex-direction: column;
            }
            
            .time-row, .conversion-row {
                flex-direction: column;
                gap: 15px;
            }
        }
		
	   @media (max-width: 480px) {
		
		  header {
            margin-bottom: 30px;
        }
	   }
		
    </style>