/* iOS风格的登录/注册页面 */
:root {
    --ios-blue: #007AFF;
    --ios-gray: #8E8E93;
    --ios-light-gray: #F2F2F7;
    --ios-dark-gray: #1C1C1E;
    --ios-off-white: #FAFAFA;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--ios-light-gray);
}

/* 登录/注册容器 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: calc(100vh - 120px); /* 减去header和footer的高度 */
    padding: 20px;
}

/* 登录/注册卡片 */
.login-box {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

/* 标题样式 */
.login-box h2 {
    color: var(--ios-dark-gray);
    margin-bottom: 24px;
    font-weight: 600;
    font-size: 24px;
}

/* 表单分组 */
.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    color: var(--ios-gray) !important;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
}

/* 输入框 */
input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #E5E5EA;
    background-color: white;
    color: var(--ios-dark-gray);
    font-size: 16px;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

input:focus {
    border-color: var(--ios-blue);
    outline: none;
}

/* 按钮样式 */
.login-btn {
    width: 100%;
    padding: 14px;
    background-color: var(--ios-blue);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    margin-top: 10px;
    transition: background-color 0.2s;
}

.login-btn:hover {
    background-color: #0062CC;
}

/* 注册链接 */
.signup-link {
    margin-top: 20px;
    color: var(--ios-gray);
    font-size: 14px;
}

.signup-link a {
    color: var(--ios-blue);
    text-decoration: none;
    font-weight: 500;
}

.signup-link a:hover {
    text-decoration: underline;
}

/* 错误消息样式 */
.error-message {
    background-color: #FFE8E6;
    color: #FF3B30;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 14px;
    text-align: left;
    display: flex;
    align-items: center;
}

.error-message i {
    margin-right: 8px;
    font-size: 16px;
}

/* 成功消息样式 */
.success-message {
    background-color: #E4F3E2;
    color: #34C759;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 14px;
    text-align: left;
    display: flex;
    align-items: center;
}

.success-message i {
    margin-right: 8px;
    font-size: 16px;
}

.error-message {
    color: #dc3545;
    background-color: #f8d7da;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #f5c2c7;
    border-radius: 4px;
}

.success-message {
    color: #0f5132;
    background-color: #d1e7dd;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #badbcc;
    border-radius: 4px;
}