* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f4f4f4;
}
header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.logo {
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}
main {
    max-width: 95%;  
    margin: 2rem auto;
    padding: 0 20px;
}
.container {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    max-width: 95%;  
    width: 100%;
    margin: 0 auto;
}
h1 {
    margin-bottom: 2rem;
    color: #2c3e50;
}
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}
.tool-card {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid #ddd;
    transition: transform 0.2s, box-shadow 0.2s;
}
.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.tool-card h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}
.tool-card p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.btn {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
}
.btn:hover {
    background: #2980b9;
}
form {
    max-width: 100%;
}
.form-group {
    margin-bottom: 1.5rem;
}
label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 600;
}
textarea, input[type="text"], select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}
.result {
    margin-top: 2rem;
    background: #ecf0f1;
    padding: 1rem;
    border-radius: 4px;
}
.result pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}
footer {
    text-align: center;
    padding: 1rem 0;
    color: #777;
    font-size: 0.9rem;
}