/* 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #f8f8f8;
    color: #333;
}

/* 页面容器 */
.container {
    max-width: 450px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h2 {
    text-align: center;
    color: #d32f2f; /* 红色主题 */
    font-size: 24px;
    margin-bottom: 20px;
}

p {
    text-align: center;
    font-size: 14px;
}

.error {
    color: #e74c3c;
    font-size: 14px;
    text-align: center;
    margin-bottom: 15px;
}

/* 表单元素 */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    margin-top: 5px;
}

button {
    width: 100%;
    padding: 10px;
    border: none;
    background-color: #d32f2f; /* 红色按钮 */
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #c2185b; /* 深红色 */
}

/* 链接样式 */
a {
    color: #d32f2f;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .container {
        width: 90%;
        padding: 15px;
    }

    h2 {
        font-size: 20px;
    }

    button {
        font-size: 14px;
    }

    .form-group input {
        font-size: 14px;
    }
}

/* 隐藏注册表单 */
#register-form {
    display: none;
}