/**
 * Athena Design System - Administrative Layout
 * Layout structure for VklassAdminWeb including dual toolbar, drawers, and content areas
 * Based on documentation/ui-admin.md specifications
 */

/* ========================================
   Base Layout Structure
   ======================================== */

.vk-layout--app-admin {
    background-color: var(--admin-background);
    min-height: 100vh;
    padding-top: var(--total-toolbar-height);
}

/* ========================================
   Dual Toolbar System
   ======================================== */

.admin-toolbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-toolbar);
    height: var(--total-toolbar-height);
}

/* Primary Dark Toolbar */
.admin-toolbar-primary {
    background-color: var(--gray-darker);
    border-bottom: 1px solid var(--admin-nav-border);
    height: var(--toolbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--content-padding);
    padding-left: var(--app-drawer-width);
}

/* Secondary Context Toolbar */
.admin-toolbar-secondary {
    background-color: var(--admin-background);
    height: var(--admin-context-height);
    border-bottom: 2px solid var(--gray);
    padding: 15px 27px 0;
    display: flex;
    align-items: flex-start;
}

.admin-application-name {
    text-transform: uppercase;
    font-size: var(--admin-header-size);
    letter-spacing: var(--letter-spacing-looser);
    color: var(--gray-darker);
    font-weight: var(--font-weight-normal);
}

/* Logo Styling for Dark Background */
.admin-logo {
    display: flex;
    align-items: center;
    border-left: 1px solid var(--admin-nav-border);
    padding-left: 20px;
    height: 37px;
}

.admin-logo__symbol {
    width: 44px;
    height: 28.45px;
    margin-right: 15px;
}

.admin-logo__text {
    width: 58px;
    height: 15.5px;
}

/* ========================================
   Application Drawer (Dark Navigation)
   ======================================== */

.admin-app-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--app-drawer-width);
    height: 100vh;
    background-color: var(--admin-nav-dark);
    z-index: var(--z-app-drawer);
}

.admin-app-drawer-toggler {
    width: var(--app-drawer-width);
    height: var(--toolbar-height);
    background: none;
    border: none;
    color: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.admin-app-drawer-toggler:hover,
.admin-app-drawer-toggler--active {
    color: var(--white);
    background-color: var(--black);
}

.admin-app-nav {
    background-color: var(--admin-nav-dark);
    width: var(--app-drawer-expanded-width);
    height: calc(100vh - var(--toolbar-height));
    position: absolute;
    left: 0;
    top: var(--toolbar-height);
    transform: translateX(-100%);
    transition: var(--drawer-transition);
    padding-top: var(--gap-double);
    overflow-y: auto;
}

.admin-app-nav--open {
    transform: translateX(0);
}

/* ========================================
   Main Menu (Light Navigation)
   ======================================== */

.admin-main-menu {
    position: fixed;
    top: var(--total-toolbar-height);
    left: var(--app-drawer-width);
    width: var(--main-menu-width);
    height: calc(100vh - var(--total-toolbar-height));
    background-color: var(--admin-background);
    border-right: 2px solid var(--gray-light);
    overflow-y: auto;
    padding-top: var(--gap-double);
}

.admin-main-menu-content {
    padding: 0;
}

/* ========================================
   Main Content Area
   ======================================== */

.admin-main-content {
    margin-left: var(--total-nav-width);
    margin-top: var(--total-toolbar-height);
    background-color: var(--white);
    min-height: calc(100vh - var(--total-toolbar-height));
    padding: var(--content-padding);
}

.admin-content-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ========================================
   Account Menu
   ======================================== */

.admin-account-menu {
    padding-left: 15px;
    border-left: 1px solid var(--admin-nav-border);
}

.admin-account-button {
    display: flex;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-lighter);
}

.admin-account-text {
    margin-right: 12px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-loose);
    font-weight: var(--font-weight-normal);
}

/* ========================================
   Menu Overlay for Mobile
   ======================================== */

.admin-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-drawer-overlay);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.admin-menu-overlay--visible {
    opacity: 1;
    pointer-events: auto;
}

/* ========================================
   Mobile Responsive Layout
   ======================================== */

@media (max-width: 768px) {
    .vk-layout--app-admin {
        padding-top: var(--toolbar-height);
    }

    .admin-toolbar {
        height: var(--toolbar-height);
    }

    .admin-toolbar-secondary {
        display: none;
    }

    .admin-toolbar-primary {
        padding-left: 16px;
    }

    .admin-app-drawer {
        width: 100%;
        transform: translateX(-100%);
    }

    .admin-app-drawer--open {
        transform: translateX(0);
    }

    .admin-main-menu {
        left: 0;
        top: var(--toolbar-height);
        transform: translateX(-100%);
        width: 280px;
        z-index: var(--z-app-drawer);
    }

    .admin-main-menu--open {
        transform: translateX(0);
    }

    .admin-main-content {
        margin-left: 0;
        margin-top: var(--toolbar-height);
        padding: var(--content-padding-mobile);
    }

    .admin-mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--gray-darker);
        border-right: 1px solid var(--gray-dark);
        padding: 8px 16px;
        margin-right: 16px;
    }

    .admin-mobile-breadcrumb {
        color: var(--gray-darker);
        font-weight: var(--font-weight-medium);
    }

    .admin-mobile-app-toggler {
        background-color: var(--black);
        color: var(--white);
        width: 100%;
        padding: 19px 26px;
        text-align: center;
        text-transform: uppercase;
        font-weight: var(--font-weight-medium);
        position: relative;
        border: none;
    }

    .admin-mobile-app-toggler .material-icons {
        position: absolute;
        left: 13px;
        top: 50%;
        transform: translateY(-50%);
    }
}

/* ========================================
   Tablet Adjustments
   ======================================== */

@media (min-width: 769px) and (max-width: 1024px) {
    .admin-main-content {
        margin-left: 250px;
    }

    .admin-main-menu {
        width: 172px;
    }
}

/* ========================================
   Desktop Enhancements
   ======================================== */

@media (min-width: 1025px) {
    .admin-main-content {
        padding: 40px;
    }
}