/* ═══════════════════════════════════════════════════
   App Shell Layout: Sidebar + Topbar + Content
   ═══════════════════════════════════════════════════ */

#app {
    height: 100vh;
}

.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    height: 100vh;
    overflow: hidden;
}

/* ── Sidebar ── */

.sidebar {
    display: flex;
    flex-direction: column;
    background: var(--md-surface-container);
    border-right: 1px solid var(--md-outline-variant);
    padding: 16px 12px;
    overflow-y: auto;
}

.sidebar__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    margin-bottom: 8px;
}

.sidebar__logo .material-symbols-outlined {
    font-size: 28px;
    color: var(--md-primary);
}

.sidebar__logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--md-on-surface);
    letter-spacing: -0.5px;
}

.sidebar__nav {
    flex: 1;
    list-style: none;
    margin: 8px 0;
}

.sidebar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-xl);
    cursor: pointer;
    color: var(--md-on-surface-variant);
    font-weight: 500;
    font-size: 14px;
    transition: background var(--duration-short) var(--easing-standard);
    margin-bottom: 2px;
    user-select: none;
}

.sidebar__item:hover {
    background: var(--md-surface-container-highest);
}

.sidebar__item.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-weight: 700;
}

.sidebar__item .material-symbols-outlined {
    font-size: 24px;
}

.sidebar__divider {
    height: 1px;
    background: var(--md-outline-variant);
    margin: 8px 16px;
}

.sidebar__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 8px;
    border-top: 1px solid var(--md-outline-variant);
    margin-top: 8px;
}

.sidebar__user {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
}

.sidebar__user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--md-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

.sidebar__user-role {
    font-size: 11px;
    color: var(--md-on-surface-variant);
}

/* ── Main Area ── */

.main-area {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ── Topbar ── */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--topbar-height);
    padding: 0 24px;
    border-bottom: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    flex-shrink: 0;
}

.topbar__title {
    font-size: 22px;
    font-weight: 400;
    color: var(--md-on-surface);
}

.topbar__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Content ── */

.content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--md-surface-container-low);
}

/* ── Page header (inside content) ── */

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header__left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.page-header__right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Tabs ── */

.tabs {
    display: flex;
    border-bottom: 1px solid var(--md-outline-variant);
    margin-bottom: 24px;
}

.tab {
    padding: 12px 24px;
    font-weight: 500;
    font-size: 14px;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--duration-short);
}

.tab:hover {
    color: var(--md-on-surface);
    background: var(--md-surface-container);
}

.tab.active {
    color: var(--md-primary);
    border-bottom-color: var(--md-primary);
}

/* ── Card ── */

.card {
    background: var(--md-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    padding: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-size: 16px;
    font-weight: 500;
}

/* ═══════════════════════════════════════════════════
   App Shell — kebab-case class aliases (from app-shell.js)
   ═══════════════════════════════════════════════════ */

.sidebar-header {
    padding: 8px 16px;
    margin-bottom: 8px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    color: var(--md-primary);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--md-on-surface);
    letter-spacing: -0.5px;
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 8px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-xl);
    color: var(--md-on-surface-variant);
    font-weight: 500;
    font-size: 14px;
    text-decoration: none;
    transition: background var(--duration-short) var(--easing-standard);
    user-select: none;
}

.nav-item:hover {
    background: var(--md-surface-container-highest);
}

.nav-item.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-weight: 700;
}

.nav-icon {
    font-size: 24px;
}

.sidebar-footer {
    border-top: 1px solid var(--md-outline-variant);
    margin-top: 8px;
    padding-top: 12px;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
    flex-shrink: 0;
}

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

.user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--md-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 11px;
    color: var(--md-on-surface-variant);
}

.btn-logout {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    transition: background var(--duration-short);
    flex-shrink: 0;
}

.btn-logout:hover {
    background: var(--md-error-container);
    color: var(--md-error);
}

/* Topbar kebab aliases */
.topbar-title {
    font-size: 22px;
    font-weight: 400;
    color: var(--md-on-surface);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-toggle {
    display: none; /* desktop only, no toggle needed */
}