:root {
    --primary-color: #002b5b;
    --accent-color: #39ff14;
    --secondary-color: #8c52ff;
    --text-color: #ffffff;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --hover-scale: scale(1.05);
}

body {
    font-family: 'Roboto', 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #002b5b, #121212);
    margin: 0;
    padding: 0;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #002b5b, #1a1a1a);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px;
}

.card {
    background: linear-gradient(135deg, #002b5b, #1a1a1a);
    border: 1px solid var(--accent-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: var(--hover-scale);
}

.flip-card {
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
}

.flip-card-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, #1a1a1a, #002b5b);
    color: var(--accent-color);
}

.icon {
    fill: var(--accent-color);
    width: 24px;
    height: 24px;
}

pre {
    background: #1a1a1a;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
}

code {
    color: var(--accent-color);
    font-family: 'Courier New', Courier, monospace;
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

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

footer {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #1a1a1a, #002b5b);
    color: var(--text-color);
    font-size: 0.9rem;
}