/* ============================================================
   CloudVault — Layout CSS
   Grid, Sidebar, Top Bar, Content Area structural styles
   ============================================================ */

/* ==================== APP LAYOUT ==================== */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ==================== SIDEBAR ==================== */

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: rgba(8, 8, 12, 0.4);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    border-right: var(--border-glass);
    display: flex;
    flex-direction: column;
    z-index: var(--z-sticky);
    transition: width var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.sidebar-logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

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

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 9px 12px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.sidebar-link.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.sidebar-link-icon {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-link-count {
    margin-left: auto;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    background: var(--bg-glass);
    padding: 2px 8px;
    border-radius: var(--border-radius-full);
}

.sidebar-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-sm) 0;
}

/* Sidebar storage section */
.sidebar-storage {
    padding: var(--space-md);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

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

.sidebar-storage-combined {
    margin-bottom: var(--space-md);
}

.sidebar-storage-label {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.sidebar-storage-accounts {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.sidebar-storage-account {
    padding: var(--space-sm);
    background: var(--bg-glass);
    border-radius: var(--border-radius-sm);
}

.sidebar-storage-account-name {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Sidebar actions */
.sidebar-actions {
    padding: var(--space-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    flex-shrink: 0;
}

/* ==================== TOPBAR ==================== */

.topbar {
    height: var(--topbar-height);
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    background: rgba(8, 8, 12, 0.4);
    border-bottom: var(--border-glass);
    display: flex;
    align-items: center;
    padding: 0 var(--space-lg);
    gap: var(--space-md);
    z-index: var(--z-sticky);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    transition: left var(--transition);
}

.topbar-search {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.topbar-search-input {
    width: 100%;
    padding: 8px 14px 8px 40px;
    font-size: var(--font-size-sm);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.topbar-search-input:focus {
    outline: none;
    background: var(--bg-input-focus);
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.topbar-search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 16px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-left: auto;
}

.topbar-storage {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.topbar-storage-bar {
    width: 80px;
    height: 4px;
    background: var(--bg-glass);
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.topbar-storage-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-full);
}

.topbar-theme-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 16px;
}

.topbar-theme-toggle:hover {
    background: var(--bg-glass-heavy);
}

.topbar-user {
    position: relative;
}

.topbar-user-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 4px 4px 4px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.topbar-user-btn:hover {
    background: var(--bg-glass-heavy);
}

.topbar-user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 20px;
}

/* ==================== MAIN CONTENT ==================== */

.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: var(--space-lg);
    min-height: calc(100vh - var(--topbar-height));
    transition: margin-left var(--transition);
}

/* ==================== STATS ROW ==================== */

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-card-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.stat-card-change {
    font-size: var(--font-size-xs);
    color: var(--color-success);
}

/* ==================== TOOLBAR ==================== */

.toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.toolbar-group {
    display: flex;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.toolbar-btn {
    padding: 8px 14px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border-right: 1px solid var(--border-color);
}

.toolbar-btn:last-child {
    border-right: none;
}

.toolbar-btn:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.toolbar-btn.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.toolbar-spacer {
    flex: 1;
}

/* ==================== FILE GRID ==================== */

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
}

.file-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition);
}

.file-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.file-card-thumb {
    height: 140px;
    background: var(--bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.file-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-card:hover .file-card-overlay {
    opacity: 1;
}

.file-card-body {
    padding: var(--space-md);
}

.file-card-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.file-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.file-card-account {
    font-size: 10px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* ==================== FILE LIST VIEW ==================== */

.file-list {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.file-list-item {
    display: grid;
    grid-template-columns: auto 1fr 100px 100px 100px 60px;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.file-list-item:last-child {
    border-bottom: none;
}

.file-list-item:hover {
    background: var(--bg-glass);
}

/* ==================== FULL-PAGE LAYOUT (for landing, login, etc.) ==================== */

.page-full {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: transparent;
    transition: background var(--transition);
}

.page-nav.scrolled {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.page-nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.page-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.page-nav-link {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.page-nav-link:hover {
    color: var(--text-primary);
}

.page-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.page-footer {
    padding: var(--space-xl);
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.page-footer a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.page-footer a:hover {
    color: var(--color-primary);
}

/* ==================== SECTION CONTAINER ==================== */

.section {
    padding: var(--space-4xl) var(--space-xl);
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

/* ==================== GRID HELPERS ==================== */

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

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

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

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

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