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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            background-color: #fff8ef;
        }

        header {
            background-color: #ffffff;
            padding: 15px 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 80px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.08);
        }

        .logo {
            font-size: 28px;
            font-weight: bold;
            color: #333333;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            cursor: pointer;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #ff8c00 0%, #ffb84d 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 0;
        }

        nav > ul > li {
            position: relative;
        }

        nav a {
            display: block;
            padding: 25px 30px;
            font-size: 18px;
            color: #333333;
            text-decoration: none;
            transition: background-color 0.3s ease;
        }

        nav > ul > li > a:hover {
            background-color: #fff2e6;
        }

        .dropdown {
            position: relative;
        }

        .dropdown-toggle::after {
            content: ' ▼';
            font-size: 12px;
        }

        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            background-color: #ffffff;
            flex-direction: row;
            z-index: 1000;
            box-shadow: 0 8px 16px rgba(0,0,0,0.08);
        }

        .dropdown-menu li {
            width: auto;
        }

        .dropdown-menu a {
            padding: 15px 30px;
            color: #333333;
            text-decoration: none;
            transition: background-color 0.3s ease;
            display: block;
            white-space: nowrap;
        }

        .dropdown-menu a:hover {
            background-color: #fff2e6;
        }

        .dropdown.active .dropdown-menu {
            display: flex;
        }

        .contact-section {
            background-color: #fff8ef;
            padding: 60px 30px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .contact-section h2 {
            font-size: 36px;
            margin-bottom: 40px;
            color: #1a1a1a;
        }

        .contact-form {
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            max-width: 600px;
            width: 100%;
        }

        .form-group {
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            margin-bottom: 8px;
            font-weight: 600;
            color: #333;
            font-size: 14px;
        }

        .form-group label .required {
            color: #ff8c00;
            margin-left: 3px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #ff8c00;
            box-shadow: 0 0 5px rgba(255, 140, 0, 0.3);
        }

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

        .form-group h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: #1a1a1a;
        }

        .system-section {
            border: 1px solid #eee;
            border-radius: 8px;
            padding: 18px;
            margin-bottom: 20px;
            background: #faf8f4;
        }

        .system-subsection {
            margin-bottom: 18px;
        }

        .system-subsection label {
            display: block;
            margin-bottom: 8px;
            font-weight: 700;
            color: #333;
        }

        .checkbox-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .checkbox-row label {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
            color: #333;
            font-size: 14px;
        }

        .checkbox-row input {
            width: auto;
            margin: 0;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        @media (max-width: 600px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }

        .submit-btn {
            background: linear-gradient(135deg, #ff8c00 0%, #ffb84d 100%);
            color: white;
            padding: 14px 40px;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            width: 100%;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(255, 140, 0, 0.25);
        }

        .submit-btn:active {
            transform: translateY(0);
        }

        /* Form message styles */
        .form-message {
            width: 100%;
            max-width: 600px;
            padding: 16px;
            margin-bottom: 20px;
            border-radius: 4px;
            font-size: 14px;
            line-height: 1.6;
        }

        .form-message.error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .form-message.success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .form-message p {
            margin: 0 0 8px 0;
        }

        .form-message ul {
            margin: 8px 0 0 20px;
            padding: 0;
        }

        .form-message li {
            margin-bottom: 4px;
        }

        .submit-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
        }

        .submit-btn:disabled:hover {
            transform: none;
            box-shadow: none;
        }