/* 基础样式变量 */
:root {
    --uc-bg-color: rgba(255, 255, 255, 0.7); 
    --uc-card-bg: rgba(255, 255, 255, 0.6); 
    --uc-modal-bg: rgba(255, 255, 255, 0.85); 
    --uc-text-primary: #1a1a1a;
    --uc-text-secondary: #666666;
    --uc-text-tertiary: #999999;
    --uc-border-color: rgba(224, 224, 224, 0.5);
    --uc-accent-color: #0078d4;
    --uc-hover-color: rgba(234, 236, 238, 0.5);
    --uc-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --uc-radius: 8px;
    --uc-transition: all 0.2s ease;
    --uc-backdrop-blur: blur(12px); 
}

/* 暗黑模式变量 */
body.dark-mode {
    --uc-bg-color: rgba(26, 26, 26, 0.7);
    --uc-card-bg: rgba(45, 45, 45, 0.6);
    --uc-modal-bg: rgba(45, 45, 45, 0.85);
    --uc-text-primary: #f0f0f0;
    --uc-text-secondary: #bbbbbb;
    --uc-text-tertiary: #777777;
    --uc-border-color: rgba(68, 68, 68, 0.5);
    --uc-accent-color: #0094ff;
    --uc-hover-color: rgba(61, 61, 61, 0.5);
    --uc-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 基础样式重置 */
.user-center-wrapper * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* 主容器（用户中心） */
.user-center-wrapper {
    background-color: var(--uc-bg-color);
    backdrop-filter: var(--uc-backdrop-blur);
    -webkit-backdrop-filter: var(--uc-backdrop-blur);
    border-radius: var(--uc-radius); 
    padding: 30px; 
}

/* 卡片基础样式 */
.uc-card {
    background-color: var(--uc-card-bg);
    backdrop-filter: var(--uc-backdrop-blur);
    -webkit-backdrop-filter: var(--uc-backdrop-blur);
    border-radius: var(--uc-radius);
    box-shadow: var(--uc-shadow);
    border: 1px solid var(--uc-border-color);
    margin-bottom: 16px;
}

/* 顶部信息卡片、头像、用户信息等样式保持不变（省略重复代码，完整代码见文末） */

/* ========== 登录/注册页背景核心样式 ========== */
/* 假设登录页body含.login类，注册页含.register类（需根据实际HTML调整） */
body.login,
body.register {
    min-height: 100vh; /* 占满屏幕高度 */
    margin: 0; 
    padding: 0; 
    /* 背景配置 */
    background-color: #f5f5f5; /* 图片加载失败时的 fallback 颜色 */
    /* 移除背景图片引用，使用默认背景色 */
    background-size: cover; /* 按比例覆盖屏幕，适配所有设备 */
    background-position: center center; /* 水平+垂直居中 */
    background-repeat: no-repeat; /* 禁止重复 */
    background-attachment: fixed; /* 背景固定，滚动时不移动 */
}

/* 登录/注册表单容器（若表单有独立容器，如.login-form，需调整类名） */
.login-form,
.register-form {
    max-width: 400px;
    margin: 40px auto;
    padding: 24px;
    border-radius: var(--uc-radius);
    box-shadow: var(--uc-shadow);
    /* 增强表单可读性 */
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* 暗黑模式下的表单容器 */
body.dark-mode .login-form,
body.dark-mode .register-form {
    background-color: rgba(45, 45, 45, 0.9);
}

/* ========== 弹窗样式 ========== */
.uc-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.uc-modal.show {
    display: block;
}

.uc-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
}

.uc-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 400px;
    background-color: var(--uc-modal-bg);
    backdrop-filter: var(--uc-backdrop-blur);
    -webkit-backdrop-filter: var(--uc-backdrop-blur);
    border-radius: var(--uc-radius);
    box-shadow: var(--uc-shadow);
    border: 1px solid var(--uc-border-color);
    overflow: hidden;
}

.uc-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--uc-border-color);
}

.uc-modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--uc-text-primary);
}

.uc-modal-close {
    font-size: 24px;
    color: var(--uc-text-tertiary);
    cursor: pointer;
    transition: var(--uc-transition);
}

.uc-modal-close:hover {
    color: var(--uc-text-primary);
}

/* 恢复用户中心模态窗口的关闭按钮显示 */
#user-center-modal .uc-modal-close {
    display: block !important;
}

.uc-modal-body {
    padding: 16px;
}

/* Tab 样式 */
.uc-tab-container {
    display: flex;
    border-bottom: 1px solid var(--uc-border-color);
    margin-bottom: 16px;
}

.uc-tab {
    padding: 8px 16px;
    cursor: pointer;
    color: var(--uc-text-secondary);
    transition: var(--uc-transition);
}

.uc-tab.active {
    color: var(--uc-accent-color);
    border-bottom: 2px solid var(--uc-accent-color);
}

.uc-tab:hover {
    color: var(--uc-text-primary);
}

.uc-tab-content {
    min-height: 300px;
}

/* 密码大写提示 */
.caps-lock-warning {
    display: none;
    color: #ff6b6b;
    font-size: 12px;
    margin-top: 4px;
    position: relative;
    padding-left: 16px;
}

.caps-lock-warning::before {
    content: "\f00d";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

/* 密码大写提示 */
.caps-lock-warning {
    display: none;
    color: #ff6b6b;
    font-size: 12px;
    margin-top: 4px;
    position: relative;
    padding-left: 16px;
}

.caps-lock-warning::before {
    content: "\f00d";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

/* 密码大写提示 */
.caps-lock-warning {
    display: none;
    color: #e74c3c;
    font-size: 12px;
    margin-top: 5px;
    padding-left: 20px;
    position: relative;
}

.caps-lock-warning::before {
    content: "\f071";
    font-family: "FontAwesome";
    position: absolute;
    left: 0;
    top: 0;
}

.uc-tab-pane {
    display: none;
}

.uc-tab-pane.active {
    display: block;
}

/* 表单样式调整 */
.uc-form-group {
    margin-bottom: 16px;
}

.uc-form-group label {
    display: block;
    margin-bottom: 4px;
    color: var(--uc-text-primary);
    font-size: 14px;
}

.uc-form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--uc-border-color);
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.7);
    color: var(--uc-text-primary);
    font-size: 14px;
    transition: var(--uc-transition);
}

.uc-form-control:focus {
    outline: none;
    border-color: var(--uc-accent-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.uc-btn {
    padding: 10px 16px;
    background-color: var(--uc-accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--uc-transition);
}

.uc-btn:hover {
    background-color: #0066b4;
}

.uc-link {
    color: var(--uc-accent-color);
    text-decoration: none;
}

.uc-link:hover {
    text-decoration: underline;
}

.form-message {
    margin-top: 16px;
    padding: 8px;
    border-radius: 4px;
    text-align: center;
    display: none;
}

.form-message.success {
    background-color: rgba(0, 200, 83, 0.1);
    color: #00c853;
    border: 1px solid rgba(0, 200, 83, 0.3);
}

.form-message.error {
    background-color: rgba(255, 53, 71, 0.1);
    color: #ff3547;
    border: 1px solid rgba(255, 53, 71, 0.3);
}

.form-message.info {
    background-color: rgba(0, 120, 212, 0.1);
    color: var(--uc-accent-color);
    border: 1px solid rgba(0, 120, 212, 0.3);
}

/* ========== 原有用户中心样式保持不变（以下为完整代码，包含之前的样式） ========== */
/* 顶部信息卡片 */
.profile-header {
    display: flex;
    align-items: center;
    padding: 16px;
    gap: 16px;
}

.avatar-box {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.avatar-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--uc-border-color);
}

.avatar-tip {
    margin-top: 6px;
    font-size: 12px;
    color: var(--uc-text-tertiary);
    text-align: center;
    line-height: 1.3;
    max-width: 120px;
}

.user-info {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.user-info h2 {
    font-size: 18px;
    margin: 0 0 6px;
    color: var(--uc-text-primary);
}

.user-info p {
    margin: 3px 0;
    font-size: 14px;
    color: var(--uc-text-secondary);
}

.edit-profile-btn {
    align-self: flex-start;
    margin-top: 8px;
    padding: 6px 12px;
    background-color: transparent;
    border: 1px solid var(--uc-accent-color);
    color: var(--uc-accent-color);
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--uc-transition);
}

.edit-profile-btn:hover {
    background-color: rgba(0, 120, 212, 0.1);
}

body.dark-mode .edit-profile-btn:hover {
    background-color: rgba(0, 148, 255, 0.2);
}

.profile-info {
    padding: 16px;
}

.profile-info h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--uc-text-primary);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--uc-border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row label {
    color: var(--uc-text-tertiary);
    width: 80px;
    font-size: 14px;
}

.info-row span {
    flex: 1;
    color: var(--uc-text-primary);
    font-size: 14px;
    text-align: right;
}

#user-center-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 恢复模态窗口正常关闭功能 */
#user-center-modal .uc-modal-close {
    display: block !important;
    cursor: pointer;
}

#user-center-modal .uc-modal-overlay {
    cursor: pointer;
}

#user-center-modal .uc-modal-overlay {
    cursor: default;
}