.auth-form {
    max-width: 450px;
    margin: 80px auto;
    background: linear-gradient(to bottom right, #ffffff, #f3f7fa);
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: box-shadow 0.3s ease-in-out;
}

.logo-small {
    max-width: 80px;
    margin-bottom: 2px;
}
.register-box {
    max-width: 400px; /* کوچکتر از 400px */
    margin: 1px auto;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}


.auth-form:hover {
    box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

.auth-form h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 25px;
    color: #0078ff;
    text-align: center;
}

.auth-form label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
}

.auth-form input[type="text"],
.auth-form input[type="email"],
.auth-form input[type="password"] {
    width: 100%;
    padding: 10px 15px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border 0.2s ease;
}

.auth-form input:focus {
    outline: none;
    border-color: #0078ff;
}

.auth-form button {
    width: 100%;
    padding: 10px 20px;
    border: none;
    background-color: #0078ff;
    color: #fff;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.auth-form button:hover {
    background-color: #0056b3;
}

#captcha {
    font-family: monospace;
    font-size: 20px;
    letter-spacing: 3px;
    background-color: #f0f0f0;
    display: inline-block;
    padding: 6px 12px;
    border-radius: 5px;
    margin-bottom: 10px;
}