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

body {
    margin: 0;
    padding: 15px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

h1 {
    text-align: center;
    color: #333;
    margin: 20px 0 30px;
    font-size: 1.8rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    justify-content: center;
    padding: 0 10px;
}

.tool-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    color: #333;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 180px;
}

.tool-card:hover, 
.tool-card:active {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.tool-icon {
    font-size: 2.5em;
    margin-bottom: 15px;
    text-align: center;
}

.tool-title {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 10px;
    text-align: center;
}

.tool-desc {
    color: #666;
    font-size: 0.9em;
    line-height: 1.5;
    text-align: center;
    flex-grow: 1;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 0 5px;
    }
    
    h1 {
        font-size: 1.5rem;
        margin: 15px 0 20px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
    
    .tool-card {
        padding: 15px;
        min-height: 160px;
    }
    
    .tool-icon {
        font-size: 2em;
        margin-bottom: 10px;
    }
    
    .tool-title {
        font-size: 1.1em;
    }
}