:root {
    --primary-color: #00d4ff;
    /* Cyan */
    --secondary-color: #ff007a;
    /* Neon Pink */
    --background-dark: #0f172a;
    /* Dark Slate */
    --background-card: rgba(30, 41, 59, 0.7);
    /* Glassy Card */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--background-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(0, 212, 255, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(255, 0, 122, 0.15), transparent 25%);
    background-attachment: fixed;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--background-dark);
    min-width: 200px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    border: var(--glass-border);
    backdrop-filter: blur(10px);
    z-index: 1001;
    border-radius: 8px;
    top: 100%;
}

.dropdown-content a {
    color: var(--text-main);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--primary-color);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Layout */
header {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: var(--glass-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
    text-decoration: none;
}

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

nav a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

main {
    min-height: 80vh;
    /* sticky footer */
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

footer {
    text-align: center;
    padding: 2rem;
    background: rgba(15, 23, 42, 0.9);
    color: var(--text-muted);
    border-top: var(--glass-border);
    margin-top: auto;
}

/* Components */
.hero {
    text-align: center;
    padding: 5rem 1rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0099cc);
    color: #0f172a;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.6);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--background-card);
    border: var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    backdrop-filter: blur(5px);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}