/* ============================================================
   UI Design System — Layout Framework
   App shell, header, sidebar, content area, footer
   v1.0 | lib.myoasishealth.ca/v1/css/ui-layout.css
   ============================================================ */

/* --------------------------------------------------------
   App shell
   -------------------------------------------------------- */
.ui-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--ui-body-bg);
}

.ui-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* --------------------------------------------------------
   Header
   -------------------------------------------------------- */
.ui-header {
    height: var(--ui-header-height);
    background: var(--ui-header-bg);
    border-bottom: 1px solid var(--ui-header-border);
    display: flex;
    align-items: center;
    padding: 0 var(--ui-spacing-md);
    position: sticky;
    top: 0;
    z-index: 300;
    gap: var(--ui-spacing-sm);
    box-shadow: var(--ui-shadow-sm);
    flex-shrink: 0;
}

/* Brand / logo area — matches sidebar width so they align */
.ui-header__brand {
    display: flex;
    align-items: center;
    gap: var(--ui-spacing-sm);
    text-decoration: none;
    color: var(--ui-header-text);
    font-weight: 600;
    font-size: var(--ui-text-base);
    flex-shrink: 0;
    width: calc(var(--ui-sidebar-width) - var(--ui-spacing-md) * 2);
    min-width: 0;
    overflow: hidden;
}

.ui-header__brand:hover {
    text-decoration: none;
    color: var(--ui-header-text);
}

.ui-header__logo {
    height: 32px;
    width: auto;
    flex-shrink: 0;
}

.ui-header__brand-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ui-header__module-tag {
    font-size: var(--ui-text-xs);
    font-weight: 600;
    color: var(--ui-primary);
    background: var(--ui-primary-light);
    padding: 0.15em 0.5em;
    border-radius: var(--ui-radius-pill);
    white-space: nowrap;
    flex-shrink: 0;
}

/* Sidebar toggle button */
.ui-header__toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--ui-text-muted);
    padding: var(--ui-spacing-xs);
    border-radius: var(--ui-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.ui-header__toggle:hover {
    background: var(--ui-surface-3);
    color: var(--ui-body-text);
}

/* Search */
.ui-header__search {
    flex: 1;
    max-width: 380px;
    position: relative;
}

.ui-header__search-icon {
    position: absolute;
    left: 0.625rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ui-text-muted);
    pointer-events: none;
}

.ui-header__search-input {
    width: 100%;
    padding: 0.4rem 0.75rem 0.4rem 2.25rem;
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-pill);
    background: var(--ui-surface-3);
    color: var(--ui-body-text);
    font-family: var(--ui-font-family);
    font-size: var(--ui-text-sm);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.ui-header__search-input::placeholder {
    color: var(--ui-text-muted);
}

.ui-header__search-input:focus {
    outline: none;
    border-color: var(--ui-primary);
    box-shadow: 0 0 0 3px var(--ui-primary-light);
    background: var(--ui-surface-2);
}

/* Right-side actions */
.ui-header__actions {
    display: flex;
    align-items: center;
    gap: var(--ui-spacing-xs);
    margin-left: auto;
}

/* Icon button (notifications, help, etc.) */
.ui-header__icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--ui-text-muted);
    padding: 0.4rem;
    border-radius: var(--ui-radius-md);
    display: flex;
    align-items: center;
    position: relative;
    transition: background 0.15s, color 0.15s;
}

.ui-header__icon-btn:hover {
    background: var(--ui-surface-3);
    color: var(--ui-body-text);
}

/* Notification dot */
.ui-header__icon-btn .ui-dot {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ui-danger);
    border: 2px solid var(--ui-header-bg);
}

/* User menu button */
.ui-header__user {
    display: flex;
    align-items: center;
    gap: var(--ui-spacing-sm);
    cursor: pointer;
    padding: 0.3rem var(--ui-spacing-sm);
    border-radius: var(--ui-radius-md);
    border: none;
    background: none;
    color: var(--ui-header-text);
    font-family: var(--ui-font-family);
    transition: background 0.15s;
}

.ui-header__user:hover {
    background: var(--ui-surface-3);
}

.ui-header__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--ui-primary-light);
    color: var(--ui-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--ui-text-xs);
    font-weight: 700;
    flex-shrink: 0;
    overflow: hidden;
}

.ui-header__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ui-header__user-info {
    text-align: left;
    line-height: 1.2;
}

.ui-header__user-name {
    font-size: var(--ui-text-sm);
    font-weight: 500;
    display: block;
}

.ui-header__user-role {
    font-size: var(--ui-text-xs);
    color: var(--ui-text-muted);
    display: block;
}

/* --------------------------------------------------------
   Sidebar
   -------------------------------------------------------- */
.ui-sidebar {
    width: var(--ui-sidebar-width);
    background: var(--ui-sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
    transition: width 0.2s ease;
    position: relative;
    z-index: 200;
}

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

.ui-sidebar__inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.ui-sidebar__inner::-webkit-scrollbar       { width: 4px; }
.ui-sidebar__inner::-webkit-scrollbar-track { background: transparent; }
.ui-sidebar__inner::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* --------------------------------------------------------
   Navigation
   -------------------------------------------------------- */
.ui-nav {
    list-style: none;
    margin: 0;
    padding: var(--ui-spacing-sm) 0;
}

.ui-nav--sub {
    padding: 0 0 var(--ui-spacing-xs) var(--ui-spacing-sm);
    display: none;
}

.ui-nav--sub.is-open {
    display: block;
}

/* Section label */
.ui-nav__section {
    padding: var(--ui-spacing-sm) var(--ui-spacing-md) 0.25rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #475569;
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.15s;
}

/* Nav link */
.ui-nav__link {
    display: flex;
    align-items: center;
    gap: var(--ui-spacing-sm);
    padding: 0.5rem var(--ui-spacing-sm);
    margin: 1px var(--ui-spacing-xs);
    color: var(--ui-sidebar-text);
    text-decoration: none;
    font-size: var(--ui-text-sm);
    font-weight: 400;
    border-radius: var(--ui-radius-md);
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    overflow: hidden;
    cursor: pointer;
    border: none;
    background: none;
    width: calc(100% - var(--ui-spacing-xs) * 2);
    text-align: left;
    font-family: var(--ui-font-family);
}

.ui-nav__link:hover,
.ui-nav__link:focus-visible {
    background: var(--ui-sidebar-hover-bg);
    color: #cbd5e1;
    text-decoration: none;
}

.ui-nav__link--active {
    background: var(--ui-sidebar-active-bg) !important;
    color: var(--ui-sidebar-active) !important;
    font-weight: 500;
}

.ui-nav__icon {
    flex-shrink: 0;
}

.ui-nav__text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity 0.15s, width 0.2s;
}

.ui-nav__chevron {
    margin-left: auto;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.ui-nav__item--open > .ui-nav__link .ui-nav__chevron {
    transform: rotate(90deg);
}

/* Badge inside nav (for counts) */
.ui-nav__badge {
    margin-left: auto;
    background: rgba(255,255,255,0.15);
    color: #e2e8f0;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.1em 0.4em;
    border-radius: var(--ui-radius-pill);
    line-height: 1.5;
    flex-shrink: 0;
}

/* ---- Collapsed sidebar ---- */
.ui-sidebar--collapsed .ui-nav__text,
.ui-sidebar--collapsed .ui-nav__chevron,
.ui-sidebar--collapsed .ui-nav__badge,
.ui-sidebar--collapsed .ui-nav__section {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.ui-sidebar--collapsed .ui-nav__link {
    justify-content: center;
    gap: 0;
    padding: 0.5rem;
    margin: 1px auto;
    width: 40px;
}

/* Sidebar footer */
.ui-sidebar__footer {
    margin-top: auto;
    padding: var(--ui-spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}

/* --------------------------------------------------------
   Content area
   -------------------------------------------------------- */
.ui-content {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Page header bar */
.ui-page-header {
    padding: var(--ui-spacing-md) var(--ui-spacing-xl);
    border-bottom: 1px solid var(--ui-border);
    background: var(--ui-surface-2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ui-spacing-md);
    flex-wrap: wrap;
    flex-shrink: 0;
}

.ui-page-header__left {
    min-width: 0;
}

.ui-page-header__title {
    font-size: var(--ui-h4);
    font-weight: 600;
    margin: 0 0 0.125rem;
    color: var(--ui-body-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ui-page-header__breadcrumb {
    font-size: var(--ui-text-xs);
    color: var(--ui-text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.ui-page-header__breadcrumb a {
    color: var(--ui-text-muted);
}

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

.ui-page-header__actions {
    display: flex;
    align-items: center;
    gap: var(--ui-spacing-sm);
    flex-shrink: 0;
}

/* Scrollable content body */
.ui-content__body {
    padding: var(--ui-spacing-xl);
    flex: 1;
}

/* --------------------------------------------------------
   Footer
   -------------------------------------------------------- */
.ui-footer {
    background: var(--ui-surface-2);
    border-top: 1px solid var(--ui-border);
    padding: var(--ui-spacing-sm) var(--ui-spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--ui-text-xs);
    color: var(--ui-text-muted);
    flex-shrink: 0;
    flex-wrap: wrap;
    gap: var(--ui-spacing-sm);
}

.ui-footer__env {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.15em 0.5em;
    border-radius: var(--ui-radius-pill);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ui-footer__env--dev  { background: #fef3c7; color: #92400e; }
.ui-footer__env--prod { background: #d1e7dd; color: #0f5132; }

.ui-footer__version {
    font-family: monospace;
    font-size: 0.7rem;
}

/* --------------------------------------------------------
   Responsive — tablet and below
   -------------------------------------------------------- */
@media (max-width: 991.98px) {
    /* Sidebar becomes a slide-over overlay */
    .ui-sidebar {
        position: fixed;
        top: var(--ui-header-height);
        left: 0;
        bottom: 0;
        z-index: 400;
        width: var(--ui-sidebar-width) !important;
        transform: translateX(-100%);
        transition: transform 0.25s ease, box-shadow 0.25s;
    }

    .ui-sidebar.is-open {
        transform: translateX(0);
        box-shadow: var(--ui-shadow-lg);
    }

    /* Dim overlay behind sidebar on mobile */
    .ui-sidebar-overlay {
        display: none;
        position: fixed;
        inset: var(--ui-header-height) 0 0 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 399;
    }

    .ui-sidebar-overlay.is-active {
        display: block;
    }

    .ui-content__body {
        padding: var(--ui-spacing-md);
    }

    .ui-page-header {
        padding: var(--ui-spacing-md);
    }
}

/* --------------------------------------------------------
   Responsive — mobile
   -------------------------------------------------------- */
@media (max-width: 575.98px) {
    .ui-header__search {
        display: none;
    }

    .ui-header__user-info {
        display: none;
    }

    .ui-header__brand-name {
        display: none;
    }

    .ui-footer {
        padding: var(--ui-spacing-sm) var(--ui-spacing-md);
    }
}