body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7f9;
    color: #333;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: 960px;
    text-align: center;
}

header {
    margin-bottom: 40px;
}

header h1 {
    font-size: 42px;
    color: #1a237e;
    margin-bottom: 10px;
}

header p {
    font-size: 18px;
    color: #555;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.tool-card {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e0e0e0;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.tool-icon {
    margin-bottom: 20px;
}

.tool-icon svg {
    width: 50px;
    height: 50px;
    color: #3f51b5;
}

.tool-card h2 {
    font-size: 20px;
    margin: 0 0 10px 0;
    color: #333;
}

.tool-card p {
    font-size: 14px;
    line-height: 1.6;
    color: #666;
    margin: 0;
}

.tool-card.disabled {
    background-color: #f8f9fa;
    cursor: not-allowed;
    opacity: 0.7;
}

.tool-card.disabled:hover {
    transform: none;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}