* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #00ccc2 0%, #000023 100%);
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 900px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
            overflow: hidden;
        }
        
        .header {
            background: linear-gradient(130deg, #1e3c72 0%, #000023 30%);
            color: white;
            padding: 30px;
            text-align: center;
            position: relative;
			 -webkit-user-select: none; /* Safari */
			  -ms-user-select: none; /* IE 10 and IE 11 */
			  user-select: none; /* Standard syntax */
        }
        
        .header-logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            margin-bottom: 10px;
            flex-wrap: wrap;
			flex-direction: column;
        }
        
        .logo-svg {
            height: 60px;
            width: auto;
            filter: brightness(0) invert(1);
        }
        
        .header h1 {
            font-size: 2.5em;
            margin: 0;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .header p {
            opacity: 0.9;
            font-size: 1.1em;
        }
        
        .content {
            padding: 40px;
        }
        
        .form-section {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            border-left: 5px solid #00ccc2;
        }
        
        .section-title {
            color: #2c3e50;
            font-size: 1.3em;
            margin-bottom: 20px;
            font-weight: bold;
        }

		.section-description {
			color: #2c3e50;
            font-size: 0.8em;
            margin-top: -20px;
			margin-bottom: 20px;
		}
        
        .form-group {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 15px;
			
        }
        
        .input-group {
            flex: 1;
            min-width: 200px;
        }
        
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: #495057;
        }
        
        input[type="number"], select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
        }
        
        input[type="number"]:focus, select:focus {
            outline: none;
            border-color: #007bff;
            box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
        }
        
        .gas-order {
            margin: 20px 0;
        }
        
        .radio-group {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .radio-option {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 20px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            background: white;
        }
        
        .radio-option:hover {
            border-color: #007bff;
            background: #f8f9fa;
        }
        
        .radio-option input[type="radio"]:checked + span {
            color: #007bff;
            font-weight: bold;
        }
        
        .calculate-btn {
            background: linear-gradient(45deg, #28a745, #20c997);
            color: white;
            border: none;
            padding: 15px 40px;
            font-size: 18px;
            font-weight: bold;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
            display: block;
            margin: 30px auto;
        }
        
        .calculate-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4);
        }
        
        .results {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 30px;
            border-radius: 15px;
            margin-top: 30px;
            display: none;
        }
        
        .results h3 {
            text-align: center;
            font-size: 1.5em;
            margin-bottom: 25px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .result-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 20px;
        }
        
        .result-item {
            background: rgba(255, 255, 255, 0.2);
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            backdrop-filter: blur(10px);
        }
        
        .result-label {
            font-size: 0.9em;
            opacity: 0.9;
            margin-bottom: 5px;
        }
        
        .result-value {
            font-size: 1.8em;
            font-weight: bold;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
        }
        
        .warning {
            background: #fff3cd;
            border: 1px solid #ffeaa7;
            color: #856404;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            display: none;
        }
        
        .error {
            background: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            display: none;
        }
        
        @media (max-width: 768px) {
            .content {
                padding: 20px;
            }
            
            .form-group {
                flex-direction: column;
            }
            
            .radio-group {
                flex-direction: column;
            }
            
            .header-logo {
                flex-direction: column;
                gap: 15px;
            }
            
            .logo-svg {
                height: 45px;
            }
            
            .header h1 {
                font-size: 1.8em;
            }
        }

  .confetti {
    position: fixed;
    top: -50px;
    width: 70px; /* adjust size */
    height: 150px;
    background-image: url("michu.png");
    background-size: contain;
    pointer-events: none;
    animation: fall linear forwards;
  }

  @keyframes fall {
    to {
      transform: translateY(110vh) rotate(360deg);
      opacity: 0;
    }
  }