* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    max-width: 500px;
    width: 90%;
}

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
}

.cpf-box {
    background: #f7f7f7;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

#cpfGerado {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    letter-spacing: 2px;
    font-family: 'Courier New', monospace;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 10px;
    cursor: pointer;
    width: 100%;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 15px;
    font-weight: bold;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.info-box h3 {
    color: #1976d2;
    margin-bottom: 15px;
    font-size: 18px;
}

.info-box p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 10px;
    font-size: 14px;
}

.validacao-info {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    font-size: 14px;
}

.link-validacao {
    display: inline-block;
    background: #4caf50;
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    margin-top: 10px;
    transition: background 0.3s;
}

.link-validacao:hover {
    background: #45a049;
}

.copy-btn {
    background: #2196f3;
    margin-top: 10px;
}