:root {
    --main-color: #1A2B42;
    --accent-color: #3F51B5;
    --highlight-color: #FFEB3B;
    --secondary-highlight: #00E676;
    --background-gradient: linear-gradient(135deg, #1A2B42, #2C3E50);
    --card-hover: #3949AB;
    --text-light: #FFFFFF;
    --text-dark: #000000;
    --shadow-default: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.3);
}

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: var(--text-light);
    background: var(--background-gradient);
    line-height: 1.6;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--accent-color), var(--highlight-color));
    color: var(--text-dark);
    border-radius: 10px;
    margin-bottom: 20px;
}

header h1 {
    font-family: 'Open Sans', sans-serif;
    font-size: 2.5rem;
    font-weight: bold;
    margin: 0;
}

header p {
    font-size: 1.2rem;
    margin-top: 10px;
}

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

.card {
    background: var(--main-color);
    color: var(--text-light);
    border-radius: 10px;
    box-shadow: var(--shadow-default);
    transition: all 0.3s ease;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
    background: var(--card-hover);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 10px;
}

.card h3 {
    font-family: 'Open Sans', sans-serif;
    font-size: 1.2rem;
    margin: 0 0 10px;
}

.card p {
    font-size: 0.9rem;
    margin: 0;
}

.icon {
    font-family: 'Material Icons';
    font-size: 24px;
    color: var(--highlight-color);
    margin-right: 10px;
}

code {
    background: rgba(255, 255, 255, 0.1);
    padding: 5px 10px;
    border-radius: 5px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    display: block;
    margin: 10px 0;
}

pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

th {
    background: var(--accent-color);
    color: var(--text-dark);
}

ul {
    list-style: none;
    padding: 0;
}

li {
    background: rgba(255, 255, 255, 0.1);
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
}

a {
    color: var(--highlight-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 15px;
    }

    code, pre {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .card h3 {
        font-size: 1rem;
    }

    .card p {
        font-size: 0.8rem;
    }
}