:root {
    --main-bg: linear-gradient(135deg, #e8f5e9, #dcedc8);
    --accent-green: #43a047;
    --soft-blue: #1e88e5;
    --warm-orange: #fb8c00;
    --neutral-gray: #eceff1;
    --shadow-light: rgba(0, 0, 0, 0.08);
    --shadow-dark: rgba(0, 0, 0, 0.12);
}

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background: var(--main-bg);
    color: #333;
    padding: 20px;
    overflow-x: hidden;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    color: var(--accent-green);
    text-shadow: 2px 2px 6px var(--shadow-light);
}

section {
    max-width: 1200px;
    margin: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--neutral-gray);
    border-radius: 12px;
    box-shadow: 0 6px 12px var(--shadow-dark);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-dark);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 10px;
}

.card h3 {
    font-size: 1.25rem;
    color: var(--accent-green);
    margin-bottom: 10px;
}

.card p {
    font-size: 0.9rem;
    color: #555;
}

.button {
    display: inline-block;
    background: var(--soft-blue);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    transition: background 0.3s ease;
}

.button:hover {
    background: #1976d2;
}

code {
    display: block;
    background: #fafafa;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 15px 0;
    border: 1px solid #ddd;
}

pre code {
    white-space: pre-wrap;
    word-wrap: break-word;
}

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

    .card {
        padding: 15px;
    }

    code {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    section {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .button {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}