/**
 * PrismCube - Win10 亮色 Fluent Design 样式表
 * 纯正 Win10 Light Theme，绝对直角，极致亚克力
 */

/* ==================== CSS 变量 ==================== */
:root {
    --win10-bg: #f3f3f3;
    --win10-white: #ffffff;
    /* 调优：更通透的亚克力透明度 */
    --win10-acrylic: rgba(255, 255, 255, 0.6); 
    --win10-acrylic-hover: rgba(255, 255, 255, 0.8);
    --win10-border: rgba(0, 0, 0, 0.1); /* 更细腻的边框 */
    --win10-border-hover: #0078D7;
    --win10-text: #1a1a1a;
    --win10-text-secondary: #666666;
    --win10-blue: #0078D7;
    --win10-blue-hover: #106EBE;
    --win10-blue-light: rgba(0, 120, 215, 0.1);
    --win10-blue-glow: rgba(0, 120, 215, 0.3);
    --win10-sidebar-bg: #f9f9f9;
    --win10-sidebar-hover: rgba(0, 120, 215, 0.05);
    --win10-sidebar-active: rgba(0, 120, 215, 0.15);
    --win10-danger: #d13438;
    --win10-success: #107c10;
    --win10-gray: #767676;
}

/* ==================== 全局重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--win10-text);
    background: var(--win10-bg);
    height: 100%;
}

/* 绝对直角 - 全局禁用圆角 */
*, *::before, *::after {
    border-radius: 0 !important;
}

/* ==================== 应用外壳布局 ==================== */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ==================== 顶部导航栏 ==================== */
.top-nav {
    position: fixed;
    top: 0;
    left: 250px;
    right: 0;
    height: 48px;
    background: rgba(243, 243, 243, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--win10-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
}

.top-nav-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--win10-text);
}

/* ==================== 用户头像下拉区域 ==================== */
.user-menu-container {
    position: relative;
}

.user-avatar-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-avatar-btn:hover {
    background: var(--win10-blue-light);
    border-color: var(--win10-blue);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--win10-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-name {
    font-size: 14px;
    color: var(--win10-text);
}

/* 下拉卡片菜单 */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    width: 280px;
    background: var(--win10-acrylic);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--win10-border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: 16px;
    border-bottom: 1px solid var(--win10-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.dropdown-avatar {
    width: 48px;
    height: 48px;
    background: var(--win10-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
}

.dropdown-info {
    flex: 1;
}

.dropdown-username {
    font-weight: 600;
    font-size: 15px;
    color: var(--win10-text);
}

.dropdown-email {
    font-size: 12px;
    color: var(--win10-text-secondary);
    margin-top: 2px;
}

.dropdown-2fa-status {
    display: inline-block;
    margin-top: 4px;
    padding: 2px 8px;
    font-size: 11px;
    border: 1px solid var(--win10-border);
    color: var(--win10-text-secondary);
}

.dropdown-2fa-status.enabled {
    border-color: var(--win10-success);
    color: var(--win10-success);
}

.dropdown-menu {
    padding: 8px 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--win10-text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.15s ease;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--win10-sidebar-hover);
}

.dropdown-item .icon {
    width: 20px;
    text-align: center;
    color: var(--win10-text-secondary);
}

.dropdown-divider {
    height: 1px;
    background: var(--win10-border);
    margin: 8px 16px;
}

.dropdown-item.logout {
    color: var(--win10-danger);
}

.dropdown-item.logout:hover {
    background: rgba(209, 52, 56, 0.1);
}

/* 未登录状态 */
.dropdown-guest {
    padding: 20px;
    text-align: center;
}

.dropdown-guest p {
    margin-bottom: 16px;
    color: var(--win10-text-secondary);
}

/* ==================== 左侧边栏 ==================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background: var(--win10-sidebar-bg);
    border-right: 1px solid var(--win10-border);
    display: flex;
    flex-direction: column;
    z-index: 999;
}

.sidebar-brand {
    height: 48px;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid var(--win10-border);
    font-size: 18px;
    font-weight: 700;
    color: var(--win10-blue);
}

.sidebar-brand .logo-icon {
    margin-right: 10px;
    font-size: 22px;
}

.sidebar-nav {
    flex: 1;
    padding: 8px 0;
    overflow-y: auto;
}

.sidebar-section {
    margin-top: 8px;
}

.sidebar-section-title {
    padding: 8px 20px;
    font-size: 11px;
    font-weight: 600;
    color: var(--win10-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--win10-text);
    text-decoration: none;
    font-size: 14px;
    margin: 2px 8px;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.sidebar-item:hover {
    background: var(--win10-sidebar-hover);
}

.sidebar-item.active {
    background: var(--win10-sidebar-active);
    border-left: 4px solid var(--win10-blue);
    color: var(--win10-blue);
    font-weight: 600;
}

.sidebar-item .icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

/* ==================== 主内容区域 ==================== */
.main-content {
    flex: 1;
    margin-left: 250px;
    margin-top: 48px;
    padding: 24px;
    min-height: calc(100vh - 48px);
}

/* ==================== 卡片组件 ==================== */
.card {
    background: var(--win10-acrylic);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--win10-border);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--win10-border);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--win10-text);
}

.card-subtitle {
    font-size: 13px;
    color: var(--win10-text-secondary);
    margin-top: 4px;
}

/* ==================== 表单组件 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--win10-text);
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #999;
    background: var(--win10-white);
    color: var(--win10-text);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border: 2px solid var(--win10-blue);
    background: var(--win10-white);
}

.form-input::placeholder {
    color: #999;
}

.form-hint {
    margin-top: 4px;
    font-size: 12px;
    color: var(--win10-text-secondary);
}

/* ==================== 按钮组件 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--win10-blue);
    color: white;
    border-color: var(--win10-blue);
}

.btn-primary:hover {
    background: var(--win10-blue-hover);
    border-color: var(--win10-blue-hover);
    box-shadow: 0 0 8px var(--win10-blue-glow);
}

.btn-secondary {
    background: var(--win10-white);
    color: var(--win10-text);
    border-color: #999;
}

.btn-secondary:hover {
    background: var(--win10-blue-light);
    border-color: var(--win10-blue);
}

.btn-danger {
    background: var(--win10-danger);
    color: white;
    border-color: var(--win10-danger);
}

.btn-danger:hover {
    background: #b92d31;
    box-shadow: 0 0 8px rgba(209, 52, 56, 0.3);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

/* ==================== 提示消息 ==================== */
.alert {
    padding: 12px 16px;
    margin-bottom: 20px;
    border: 1px solid var(--win10-border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(16, 124, 16, 0.1);
    border-color: var(--win10-success);
    color: var(--win10-success);
}

.alert-danger {
    background: rgba(209, 52, 56, 0.1);
    border-color: var(--win10-danger);
    color: var(--win10-danger);
}

/* ==================== 个人中心页面 ==================== */
.profile-banner {
    height: 200px;
    background: linear-gradient(135deg, #0078D7 0%, #005a9e 100%);
    margin: -24px -24px 0 -24px;
    position: relative;
}

.profile-avatar-section {
    position: relative;
    margin-top: -60px;
    margin-bottom: 24px;
    display: flex;
    align-items: flex-end;
    gap: 20px;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    background: var(--win10-blue);
    border: 4px solid var(--win10-white);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.profile-info h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--win10-text);
}

.profile-info p {
    color: var(--win10-text-secondary);
    font-size: 14px;
}

/* 六宫格功能区 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.feature-card {
    background: var(--win10-acrylic);
    backdrop-filter: blur(15px);
    border: 1px solid var(--win10-border);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--win10-text);
    display: block; /* 兼容 a 标签 */
}

.feature-card:hover {
    border-color: var(--win10-blue);
    background: var(--win10-acrylic-hover);
    box-shadow: 0 0 12px var(--win10-blue-glow);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
}

.feature-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
}

.feature-desc {
    font-size: 12px;
    color: var(--win10-text-secondary);
}

/* ==================== 弹窗魔法（2FA等） ==================== */
/* 结合 href="#2fa-settings" 使用 */
#2fa-settings:target, 
#change-password:target, 
#delete-account:target {
    display: flex !important;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .top-nav {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
        padding: 12px;
        margin-top: 48px;
    }
    
    /* 手机端强制单列，不拥挤 */
    .feature-grid {
        grid-template-columns: 1fr; 
        gap: 12px;
    }
    
    .two-column {
        grid-template-columns: 1fr;
    }

    .profile-avatar-section {
        flex-direction: column;
        align-items: flex-start;
        margin-top: -50px;
        gap: 10px;
    }
    
    .profile-avatar {
        width: 90px;
        height: 90px;
        font-size: 36px;
    }
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.w-full { width: 100%; }
.hidden { display: none; }