:root {
    --primary-color: #042326;
    --secondary-color: #0A3A40;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--light-color);
    color: var(--primary-color);
}

header {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
}

h1 {
    margin: 0;
}

.tagline {
    font-style: italic;
    opacity: 0.8;
    margin-top: 0.5rem;
}

.category-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.category-filter {
    background-color: rgba(255,255,255,0.2);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.category-filter.active {
    background-color: white;
    color: var(--primary-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.intro {
    text-align: center;
    margin-bottom: 2rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.tool-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.tool-header {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: var(--secondary-color);
    color: white;
}

.tool-image {
    width: 80px;
    height: 80px;
    background-color: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    border-radius: 8px;
    margin-right: 1rem;
}

.tool-content {
    flex-grow: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.tool-title {
    margin: 0;
    color: white;
}

.tool-description {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tool-bottom {
    display: flex;
    justify-content: center;
    padding: 1.5rem;
}

.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.category {
    background-color: rgba(0,0,0,0.4);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: white;
}

.tool-link {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    text-align: center;
    min-width: 25%;
}

.tool-card-clickable {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-link:hover {
    background-color: var(--dark-color);
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

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