* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #183668 0%, #38427d 100%);
            min-height: 100vh;
  
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            animation: slideIn 0.8s ease-out;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .header {
            background: linear-gradient(135deg, #2c3e50 0%, #254471 100%);
            color: white;
            padding: 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 40px;
        }

        .header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: pulse 4s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); opacity: 0.5; }
            50% { transform: scale(1.1); opacity: 0.8; }
        }

        .header h1 {
            font-size: 2.5em;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .header p {
            font-size: 1.2em;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }

        .content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            padding: 30px;
        }

        .input-section {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .input-section:hover {
            transform: translateY(-5px);
        }

        .results-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
            font-size: 1.1em;
        }

        input, select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 1em;
            transition: all 0.3s ease;
            background: white;
        }

        input:focus, select:focus {
            outline: none;
            border-color: #a35822;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
            transform: scale(1.02);
        }

        .result-card {
            background: white;
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-left: 4px solid #3498db;
            transition: all 0.3s ease;
        }

        .result-card:hover {
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
            transform: translateX(5px);
        }

        .result-title {
            font-size: 1.2em;
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .result-value {
            font-size: 1.5em;
            font-weight: 700;
            color: #27ae60;
        }

        .cotisations-detail {
            background: white;
            padding: 20px;
            border-radius: 12px;
            margin-top: 20px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }

        .cotisation-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid #eee;
        }

        .cotisation-item:last-child {
            border-bottom: none;
        }

        .info-box {
            background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
            color: white;
            padding: 15px;
            border-radius: 10px;
            margin-top: 20px;
            animation: fadeIn 1s ease-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .regime-info {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 10px;
            margin-top: 15px;
            border-left: 4px solid #e74c3c;
        }

        .btn-calculate {
            background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
            color: white;
            padding: 15px 30px;
            border: none;
            border-radius: 10px;
            font-size: 1.1em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            margin-top: 20px;
        }

        .btn-calculate:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 184, 148, 0.3);
        }

        @media (max-width: 768px) {
            .content {
                grid-template-columns: 1fr;
            }
            
            .header h1 {
                font-size: 2em;
            }
        }