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

        :root {
            --primary: #1e293b;
            --secondary: #f59e0b;
            --tertiary: #64748b;
            --background: #fafafa;
            --success: #10b981;
            --white: #ffffff;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        [data-theme="dark"] {
            --primary: #f1f5f9;
            --secondary: #fbbf24;
            --tertiary: #94a3b8;
            --background: #0f172a;
            --success: #34d399;
            --white: #1e293b;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
        }

        body {
            font-family: 'Source Sans Pro', sans-serif;
            background: var(--background);
            color: var(--primary);
            line-height: 1.6;
            overflow-x: hidden;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s ease;
        }

        .nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: 'Inter', sans-serif;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary);
            text-decoration: none;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--primary);
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--secondary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after, .nav-links a.active::after {
            width: 100%;
        }

        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 0.5rem;
        }

        .mobile-menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--primary);
            margin: 3px 0;
            transition: all 0.3s ease;
            border-radius: 2px;
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(8px, 8px);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -7px);
        }

        /* Dark Mode Toggle */
        .theme-toggle {
            position: relative;
            width: 60px;
            height: 30px;
            background: var(--tertiary);
            border-radius: 30px;
            cursor: pointer;
            transition: background 0.3s ease;
            flex-shrink: 0;
        }

        .theme-toggle::before {
            content: '🌙';
            position: absolute;
            top: 50%;
            left: 5px;
            transform: translateY(-50%);
            font-size: 1.2rem;
            transition: all 0.3s ease;
        }

        [data-theme="dark"] .theme-toggle::before {
            content: '☀️';
            left: 30px;
        }

        [data-theme="dark"] .theme-toggle {
            background: var(--secondary);
        }

        /* Dark mode fixes for navbar */
        [data-theme="dark"] .navbar {
            background: rgba(30, 41, 59, 0.95);
            border-bottom: 1px solid rgba(148, 163, 184, 0.1);
        }

        [data-theme="dark"] .nav-links a {
            color: var(--primary);
        }

        [data-theme="dark"] .nav-links a:hover,
        [data-theme="dark"] .nav-links a.active {
            color: var(--secondary);
        }

        [data-theme="dark"] .logo {
            color: var(--primary);
        }

        /* Social Links */
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }

        .social-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.5rem;
            background: var(--background);
            border-radius: 8px;
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .social-link:hover {
            background: var(--secondary);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .form-success {
            background: #d1fae5;
            border: 2px solid var(--success);
            color: #065f46;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            display: none;
        }

        .form-error {
            background: #fee2e2;
            border: 2px solid #dc2626;
            color: #991b1b;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            display: none;
        }

        .input-error {
            border-color: #dc2626 !important;
        }

        .error-message {
            color: #dc2626;
            font-size: 0.875rem;
            margin-top: 0.25rem;
            display: none;
        }

        /* Hero Section */
        .hero {
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-align: center;
        }

        .hero h1 {
            font-family: 'Inter', sans-serif;
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto;
            opacity: 0.9;
        }

        /* Contact Section */
        .contact-section {
            padding: 5rem 0;
            background: var(--white);
        }

        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: start;
        }

        .contact-info {
            padding: 2rem 0;
        }

        .section-title {
            font-family: 'Inter', sans-serif;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 2rem;
            color: var(--primary);
        }

        .contact-description {
            font-size: 1.1rem;
            color: var(--tertiary);
            line-height: 1.8;
            margin-bottom: 2rem;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            background: var(--background);
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .contact-item:hover {
            transform: translateX(5px);
            box-shadow: var(--shadow);
        }

        .contact-icon {
            width: 50px;
            height: 50px;
            background: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
        }

        .contact-text h3 {
            font-family: 'Inter', sans-serif;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: var(--primary);
        }

        .contact-text p {
            color: var(--tertiary);
        }

        .contact-text a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .contact-text a:hover {
            color: var(--primary);
        }

        /* Contact Form */
        .contact-form {
            background: var(--white);
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary);
        }

        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
            font-family: 'Source Sans Pro', sans-serif;
        }

        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--secondary);
        }

        .form-textarea {
            resize: vertical;
            min-height: 120px;
        }

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

        .submit-btn {
            background: var(--secondary);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .submit-btn:hover {
            background: #d97706;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .submit-btn:disabled {
            background: var(--tertiary);
            cursor: not-allowed;
            transform: none;
        }

        /* Collaboration Section */
        .collaboration {
            padding: 5rem 0;
            background: var(--background);
        }

        .collaboration-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .collaboration-card {
            background: var(--white);
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: all 0.3s ease;
        }

        .collaboration-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .collaboration-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .collaboration-title {
            font-family: 'Inter', sans-serif;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .collaboration-description {
            color: var(--tertiary);
            line-height: 1.6;
            margin-bottom: 1.5rem;
        }

        .collaboration-btn {
            display: inline-block;
            background: var(--secondary);
            color: white;
            padding: 0.8rem 1.5rem;
            border-radius: 25px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .collaboration-btn:hover {
            background: #d97706;
            transform: translateY(-2px);
        }

        /* Availability Section */
        .availability {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--primary) 0%, #334155 100%);
            color: white;
            text-align: center;
        }

        .availability .section-title {
            font-family: 'Inter', sans-serif;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 2rem;
            text-align: center;
        }

        .availability-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .availability-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 12px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            text-align: center;
        }

        .availability-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .availability-title {
            font-family: 'Inter', sans-serif;
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--secondary);
        }

        .availability-description {
            opacity: 0.9;
            line-height: 1.6;
            font-size: 1rem;
        }

        /* Dark Mode - Availability Section */
        [data-theme="dark"] .availability {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        }

        [data-theme="dark"] .availability-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        [data-theme="dark"] .availability-title {
            color: var(--secondary);
        }

        /* Footer */
        .footer {
            background: var(--primary);
            color: white;
            padding: 2rem 0;
            text-align: center;
        }

        .footer p {
            opacity: 0.8;
        }

        /* Dark mode footer fix */
        [data-theme="dark"] .footer {
            background: #1e293b;
            border-top: 1px solid rgba(148, 163, 184, 0.2);
        }

        [data-theme="dark"] .footer p {
            color: #f1f5f9;
            opacity: 0.9;
        }

        /* Success Message */
        .success-message {
            background: var(--success);
            color: white;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            display: none;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            /* Prevent horizontal overflow on mobile */
            body {
                overflow-x: hidden;
            }

            .container {
                max-width: 100%;
                padding: 0 1rem;
                overflow-x: hidden;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                width: 100%;
                max-width: 300px;
                background: var(--background);
                flex-direction: column;
                padding: 2rem;
                box-shadow: var(--shadow-lg);
                transition: right 0.3s ease;
                height: calc(100vh - 70px);
                gap: 1rem;
                z-index: 999;
            }

            .nav-links.active {
                right: 0;
            }

            .nav-links li {
                width: 100%;
            }

            .nav-links a {
                display: block;
                padding: 0.8rem 0;
                font-size: 1.1rem;
            }

            .contact-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .collaboration-grid {
                grid-template-columns: 1fr;
            }

            .availability-grid {
                grid-template-columns: 1fr;
            }

            .page-header {
                padding-top: 100px;
                padding-bottom: 3rem;
            }

            .page-header h1 {
                font-size: 2rem;
            }

            .page-header p {
                font-size: 1rem;
            }

            .contact-info {
                padding: 1.5rem;
            }

            .form-input,
            .form-textarea,
            .form-select {
                font-size: 1rem;
            }

            .submit-btn {
                width: 100%;
            }
        }

        /* Animation Classes */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in.animate {
            opacity: 1;
            transform: translateY(0);
        }