:root {
    --dark-color: #0f172a;
    --secondary-color: #1e293b;
    --primary-color: #64ffda;
    --light-color: #f1f5f9;
    --text-color: #94a3b8;
    --card-bg: rgba(30, 41, 59, 0.8);
    --nav-height: 70px;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--dark-color);
    color: var(--light-color);
    line-height: 1.6;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
}

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

.nav-links a {
    color: var(--light-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--primary-color);
    background: rgba(100, 255, 218, 0.1);
}

.nav-contact-btn {
    background: rgba(100, 255, 218, 0.1);
    color: var(--primary-color) !important;
    border: 1px solid var(--primary-color);
}

.nav-contact-btn:hover {
    background: var(--primary-color);
    color: var(--dark-color) !important;
}

.menu-icon {
    display: none;
    color: var(--light-color);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }

    .menu-icon {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--dark-color);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-top: 1px solid rgba(100, 255, 218, 0.1);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

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

    .nav-links a {
        display: block;
        padding: 1rem;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.25rem;
    }
}