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

        :root {
            --primary: #0078d4;
            --primary-dark: #106ebe;
            --purple: #5c2d91;
            --green: #107c10;
            --gradient-blue: linear-gradient(135deg, #0078d4, #00a2ed);
            --secondary: #2b88d8;
            --text-dark: #1b1b1b;
            --text-light: #ffffff;
            --hover-bg: #f5f9fc;
            --orange: #ff6b00;
            --red: #d93025;
            --teal: #009688;
            --indigo: #3f51b5;
            --cyan: #00bcd4;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            background-color: #f8f9fa;
        }

        header {
            background: rgba(255, 255, 255, 0.98);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 120, 212, 0.1);
            transition: box-shadow 0.3s ease;
        }

        header.scrolled {
            box-shadow: 0 2px 20px rgba(0, 120, 212, 0.1);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0.8rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .logo-circle {
            width: 35px;
            height: 35px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
            transform: rotate(-10deg);
            transition: transform 0.3s ease;
        }

        .logo:hover .logo-circle {
            transform: rotate(0deg);
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 2.5rem;
            align-items: center;
        }

        nav a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 1rem;
            position: relative;
            padding: 0.5rem 0;
            transition: all 0.3s ease;
        }

        nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: width 0.3s ease;
            border-radius: 2px;
        }

        nav a:hover {
            color: var(--primary);
        }

        nav a:hover::after {
            width: 100%;
        }

        .nav-button {
            background: var(--primary);
            color: var(--text-light);
            padding: 0.8rem 1.8rem;
            border-radius: 4px;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .nav-button:hover {
            color: var(--text-light);
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .nav-button::after {
            display: none;
        }

        .hamburger {
            display: none;
            cursor: pointer;
            border: none;
            background: none;
            padding: 0.5rem;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-dark);
            margin: 4px 0;
            transition: all 0.3s ease;
            border-radius: 2px;
        }

        @media screen and (max-width: 768px) {
            .hamburger {
                display: block;
                z-index: 100;
            }

            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
                background-color: var(--primary);
            }

            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }

            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
                background-color: var(--primary);
            }

            nav ul {
                position: fixed;
                left: -100%;
                top: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.99);
                width: 100%;
                height: 100vh;
                padding-top: 80px;
                transition: 0.3s ease;
                gap: 2rem;
                backdrop-filter: blur(10px);
            }

            nav ul.active {
                left: 0;
            }

            nav a {
                font-size: 1.1rem;
                width: 100%;
                text-align: center;
                padding: 1rem 0;
            }

            .nav-button {
                margin-top: 1rem;
                width: auto;
                display: inline-block;
            }
        }