:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --background-color: #ecf0f1;
    --widget-background: #ffffff;
    --text-color: #34495e;
    --light-gray: #bdc3c7;
    --border-radius: 8px;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
}

.header {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--primary-color);
}

.main-content {
    padding: 2rem;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-color);
}

.search-container {
    margin-top: 1.5rem;
}

#toolSearch {
    width: 100%;
    max-width: 500px;
    padding: 1rem;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.tool-group h2 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background-color: var(--widget-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.tool-icon img {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
}

.tool-card h3 {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin: 0.5rem 0;
}

.tool-card p {
    font-size: 0.9rem;
    line-height: 1.4;
}

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