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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 24px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(135deg, #1a1919 0%, #000000 100%);
            padding: 40px;
            text-align: center;
            color: white;
        }

        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        /* Step Indicator Styles */
        .step-indicator {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 30px;
            gap: 10px;
        }

        .step-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.1rem;
            position: relative;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.3);
            color: rgba(255, 255, 255, 0.7);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .step-dot.active {
            background: white;
            color: #ff6b35;
            border-color: white;
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .step-dot.completed {
            background: rgba(255, 255, 255, 0.8);
            color: #ff6b35;
            border-color: rgba(255, 255, 255, 0.8);
        }

        .step-dot.completed::before {
            content: "";
            display: inline-block;
            width: 32px;
            height: 32px;
            background-image: url('fontawesome/svgs/regular/check-circle.svg'); /* PNG de olabilir */
            background-size: contain;
            background-repeat: no-repeat;
        }

        .step-line {
            width: 40px;
            height: 2px;
            background: rgba(255, 255, 255, 0.3);
            transition: all 0.3s ease;
        }

        .step-line.completed {
            background: rgba(255, 255, 255, 0.8);
        }

        .form-container {
            padding: 40px;
        }

        .step {
            display: none;
            margin-bottom: 40px;
            opacity: 0;
            transform: translateY(20px);
        }

        .step.active {
            display: block;
            animation: fadeInUp 0.6s ease forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .step-header {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }

        .step-number {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #ff9a56, #ff6b35);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 15px;
            font-size: 1.1rem;
        }

        .step-title {
            font-size: 1.4rem;
            font-weight: 600;
            color: #2d3748;
        }

        .form-grid {
            display: grid;
            gap: 20px;
        }

        .grid-2 { grid-template-columns: 1fr 1fr; }
        .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
        .grid-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
        .form-group {
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #4a5568;
            font-size: 0.95rem;
        }

        .required {
            color: #e53e3e;
        }

        .form-control {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: white;
            height: 52px;
        }

        .form-control:focus {
            outline: none;
            border-color: #ff9a56;
            box-shadow: 0 0 0 3px rgba(255, 154, 86, 0.1);
            transform: translateY(-1px);
        }

        .form-control:hover {
            border-color: #cbd5e0;
        }

        .form-control.invalid {
            border-color: #e53e3e;
            background-color: #fed7d7;
        }
        select.form-control.invalid {
            border-color: #e53e3e;
            background-color: #fed7d7;
        }

        select.form-control {
            cursor: pointer;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
            padding-right: 50px;
            -webkit-appearance: none; /* Safari ve Chrome */
            -moz-appearance: none;    /* Firefox */
             appearance: none;         /* Standart */
             height: 52px;
        }

        .vehicle-filter-section {
            margin-bottom: 25px;
        }

        .filter-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #e2e8f0;
        }

        .results-count {
            font-weight: 600;
            font-size: 1.1rem;
            color: #2d3748;
        }

        .filter-dropdown {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .filter-dropdown label {
            font-weight: 500;
            color: #4a5568;
        }

        .filter-dropdown select {
            min-width: 200px;
        }

        .vehicle-card.enhanced {
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 0;
            margin-bottom: 15px;
            transition: all 0.3s ease;
            cursor: pointer;
            background: white;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .vehicle-card.enhanced:hover {
            border-color: #ff9a56;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }

        .vehicle-card.enhanced.selected {
            border-color: #ff9a56;
            background: linear-gradient(135deg, rgba(255, 154, 86, 0.1), rgba(255, 107, 53, 0.1));
            box-shadow: 0 8px 25px rgba(255, 154, 86, 0.2);
        }

        .vehicle-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            background: linear-gradient(135deg, #64696e, #323b44);
            border-bottom: 1px solid #e2e8f0;
                border-radius: 12px 12px 0px 0px;
        }

        .vehicle-class {
            font-size: 0.8rem;
            font-weight: 600;
            color: #ffffff;
            letter-spacing: 0.5px;
        }

        .vehicle-discount {
            background: #e53e3e;
            color: white;
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: bold;
        }

        .vehicle-main {
            display: flex;
            padding: 20px;
            gap: 20px;
            align-items: flex-start;
        }

        .vehicle-image-container {
            min-width: 100px;
        }

        .vehicle-image {
            width: 350px;
            background: linear-gradient(135deg, #f7fafc, #edf2f7);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            border: 1px solid #e2e8f0;
        }



        .vehicle-details {
            flex: 1;
        }

        .vehicle-details h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #2d3748;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .vehicle-type {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #000000;
            margin-bottom: 5px;
        }

        .mehr-btn {
            background: none;
            border: none;
            color: #3182ce;
            cursor: pointer;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0;
            text-decoration: underline;
        }

        .mehr-btn:hover {
            color: #2c5aa0;
        }

        .vehicle-description {
            font-size: 0.9rem;
            color: #718096;
            margin-bottom: 15px;
        }

        .vehicle-specs {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 8px;
            margin-bottom: 15px;
        }

        .spec-item {
            font-size: 0.85rem;
            color: #000000;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .vehicle-details-expanded {
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px solid #e2e8f0;
        }

        .additional-specs {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 8px;
        }

        .vehicle-pricing {
            max-width: 400px;
            text-align: right;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .price-container {
            margin-bottom: 15px;
        }

        .old-price {
            font-size: 1rem;
            color: #e53e3e;
            text-decoration: line-through;
            font-weight: 500;
            margin-bottom: 5px;
        }

        .current-price {
            font-size: 2rem;
            font-weight: bold;
            color: #2d3748;
        }

        .current-price span {
            font-size: 1rem;
            font-weight: 500;
        }

        .trip-info {
            margin-bottom: 15px;
        }

        .route {
            font-size: 0.8rem;
            color: #4a5568;
            margin-bottom: 5px;
        }

        .trip-type {
            font-size: 0.9rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 8px;
        }

        .price-note {
            font-size: 0.75rem;
            color: #718096;
            line-height: 1.3;
            margin-bottom: 15px;
        }

        .select-btn {
            background: linear-gradient(135deg, #4a4141 0%, #000000 100%);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .select-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }

        .vehicle-card.enhanced.selected .select-btn {
            background: linear-gradient(135deg, #ff9a56, #ff6b35);
        }

        .info-box {
            background: linear-gradient(135deg, #e6fffa, #f0fff4);
            border: 1px solid #81e6d9;
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .info-icon {
            color: #38b2ac;
            font-size: 1.5rem;
        }

        .payment-methods {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .payment-option {
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            padding: 15px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .payment-option:hover,
        .payment-option.selected {
            border-color: #ff9a56;
            background: rgba(255, 154, 86, 0.1);
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .checkbox-group input[type="checkbox"] {
            width: 20px;
            height: 20px;
            accent-color: #ff9a56;
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        .btn {
            padding: 16px 32px;
            border: none;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #ff9a56, #ff6b35);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 154, 86, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 154, 86, 0.4);
        }

        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: #e2e8f0;
            color: #4a5568;
        }

        .btn-secondary:hover {
            background: #cbd5e0;
        }

        .btn-block {
            width: 100%;
        }

        .step-navigation {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
            gap: 15px;
        }

        .summary-card {
            background: linear-gradient(135deg, #f7fafc, #edf2f7);
            border-radius: 16px;
            padding: 25px;
            margin-bottom: 25px;
        }

        .summary-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #e2e8f0;
        }

        .summary-item:last-child {
            border-bottom: none;
            font-weight: bold;
            font-size: 1.1rem;
            color: #ff6b35;
        }

        .error-message {
            color: #e53e3e;
            font-size: 0.875rem;
            margin-top: 5px;
        }

        @media (max-width: 768px) {
            .grid-2, .grid-3 {
                grid-template-columns: 1fr;
            }
            
            .vehicle-info {
                flex-direction: column;
                text-align: center;
            }
            
            .vehicle-price {
                margin-left: 0;
            }
            
            .header h1 {
                font-size: 2rem;
            }
            
            .form-container {
                padding: 20px;
            }

            .step-navigation {
                flex-direction: column;
            }

            .step-indicator {
                gap: 5px;
            }

            .step-dot {
                width: 35px;
                height: 35px;
                font-size: 1rem;
            }

            .step-line {
                width: 25px;
            }

            .filter-header {
                flex-direction: column;
                gap: 15px;
                align-items: stretch;
            }

            .filter-dropdown {
                justify-content: space-between;
            }

            .filter-dropdown select {
                min-width: auto;
                flex: 1;
                margin-left: 10px;
            }

            .vehicle-main {
                flex-direction: column;

            }

            .vehicle-pricing {
                min-width: auto;
                text-align: center;
                width: 100%;
            }

            .vehicle-specs {
                grid-template-columns: 1fr;
            }

            .additional-specs {
                grid-template-columns: 1fr;
            }
        }