/* --- Global Styles & Variables --- */
:root {
    --primary-color: #4A90E2; /* A nice, modern blue */
    --light-gray: #f4f7f9;
    --dark-gray: #333333;
    --medium-gray: #666666;
    --white: #ffffff;
    --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    --card-hover-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
}

/* --- Header --- */
header {
    text-align: center;
    padding: 50px 20px;
    background-color: var(--white);
    border-bottom: 1px solid #e0e0e0;
}

header h1 {
    font-size: 2.5rem;
    color: var(--dark-gray);
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Main Content & Tool Grid --- */
main {
    padding: 40px 20px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

/* --- Tool Card --- */
.tool-card {
    background-color: var(--white);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.tool-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--card-hover-shadow);
}

.tool-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

.tool-card p {
    font-size: 0.9rem;
    color: var(--medium-gray);
    flex-grow: 1; /* Ensures cards in the same row have same height */
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    header h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
    header {
        padding: 40px 15px;
    }
    header h1 {
        font-size: 2rem;
    }
    main {
        padding: 30px 15px;
    }
}