/* ============================================================
 * 众泰云 Layout CSS - 布局系统
 * 依赖: tokens.css, base.css, components.css
 * ============================================================ */

/* ----------------------------------------------------------
   应用布局 - App Layout
   ---------------------------------------------------------- */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ----------------------------------------------------------
   顶部导航栏 - Top Navigation
   ---------------------------------------------------------- */
.topnav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    height: var(--topbar-height);
    background-color: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}

.topnav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.topnav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-accent);
    text-decoration: none;
    flex-shrink: 0;
}

.topnav-logo:hover {
    color: var(--color-accent-hover);
}

.topnav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.topnav-link {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    white-space: nowrap;
}

.topnav-link:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
}

.topnav-link.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.topnav-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* 用户菜单 */
.topnav-user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.topnav-user:hover {
    background-color: var(--color-bg-secondary);
}

.topnav-user-name {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

/* 汉堡菜单按钮 (移动端) */
.topnav-hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.topnav-hamburger:hover {
    background-color: var(--color-bg-secondary);
}

.topnav-hamburger svg {
    width: 22px;
    height: 22px;
    color: var(--color-text-primary);
}

/* ----------------------------------------------------------
   主内容区 - Main Content
   ---------------------------------------------------------- */
.main-content {
    flex: 1;
    padding-top: var(--topbar-height);
}

/* ----------------------------------------------------------
   PC 布局 (侧边栏 + 主区域)
   ---------------------------------------------------------- */
.pc-layout {
    display: flex;
    flex-direction: row;
    min-height: calc(100vh - var(--topbar-height));
}

/* ----------------------------------------------------------
   侧边栏 - Sidebar
   ---------------------------------------------------------- */
.sidebar {
    position: sticky;
    top: var(--topbar-height);
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    overflow-y: auto;
    background-color: var(--color-bg);
    border-right: 1px solid var(--color-border-light);
    padding: var(--space-4);
    flex-shrink: 0;
}

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 var(--space-3);
    margin-bottom: var(--space-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
}

.sidebar-link:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.sidebar-link.active {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    font-weight: var(--font-semibold);
}

.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: var(--space-2);
    bottom: var(--space-2);
    width: 3px;
    background-color: var(--color-accent);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.sidebar-link-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-link.active .sidebar-link-icon {
    opacity: 1;
}

/* ----------------------------------------------------------
   移动端底部导航 - Mobile Bottom Nav
   ---------------------------------------------------------- */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    height: 60px;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border-light);
    padding: 0 var(--space-2);
}

.bottom-nav-items {
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: 100%;
    list-style: none;
    margin: 0;
    padding: 0;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    flex: 1;
    padding: var(--space-1) 0;
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-tertiary);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.bottom-nav-item:hover {
    color: var(--color-text-secondary);
}

.bottom-nav-item.active {
    color: var(--color-accent);
}

.bottom-nav-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.bottom-nav-label {
    line-height: 1;
}

/* ----------------------------------------------------------
   页面容器 - Page Container
   ---------------------------------------------------------- */
.page-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
}

/* ----------------------------------------------------------
   页面头部 - Page Header
   ---------------------------------------------------------- */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
}

.page-header-info {
    flex: 1;
    min-width: 0;
}

.page-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-2);
}

.page-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-normal);
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* ----------------------------------------------------------
   网格系统 - Grid
   ---------------------------------------------------------- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* ----------------------------------------------------------
   Flex 工具
   ---------------------------------------------------------- */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-items-center {
    display: flex;
    align-items: center;
}

.flex-gap-2 {
    display: flex;
    gap: var(--space-2);
}

.flex-gap-3 {
    display: flex;
    gap: var(--space-3);
}

.flex-gap-4 {
    display: flex;
    gap: var(--space-4);
}

/* ----------------------------------------------------------
   响应式断点
   ---------------------------------------------------------- */

/* 平板及以下 (<=1024px) */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .sidebar {
        width: var(--sidebar-collapsed);
        min-width: var(--sidebar-collapsed);
    }

    .sidebar-link span,
    .sidebar-section-title,
    .sidebar-nav-badge {
        display: none;
    }

    .sidebar-link {
        justify-content: center;
        padding: var(--space-3);
    }

    .sidebar-link::before {
        display: none;
    }
}

/* 手机 (<=768px) */
@media (max-width: 768px) {
    .topnav-links {
        display: none;
    }

    .topnav-hamburger {
        display: flex;
    }

    .topnav-user-name {
        display: none;
    }

    .sidebar {
        display: none;
    }

    .pc-layout {
        flex-direction: column;
    }

    .mobile-bottom-nav {
        display: block;
    }

    .main-content {
        padding-bottom: 60px; /* 底部导航高度 */
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .page-container {
        padding: var(--space-6) var(--space-4);
    }

    .page-header {
        flex-direction: column;
    }

    .page-header-actions {
        width: 100%;
    }

    .page-title {
        font-size: var(--text-2xl);
    }

    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
}

/* 小手机 (<=480px) */
@media (max-width: 480px) {
    .page-container {
        padding: var(--space-4) var(--space-3);
    }

    .card {
        padding: var(--space-4);
    }

    .modal-content {
        border-radius: var(--radius-lg);
    }

    .modal-body {
        padding: var(--space-4);
    }
}