/* ========================================
   Page frame (views/partials/layout-start.ejs, public/js/shell.js)
   app: sidebar + main column · public: slim header
   ======================================== */

:root {
  --sidebar-width: 15rem;
}

/* ─── App: sidebar + main column ─────────────────────────────── */
body.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  align-items: start;
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100dvh;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  padding: var(--spacing-md) var(--spacing-sm);
  overflow-y: auto;
  background: var(--card);
  border-right: 1px solid var(--border);
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  padding: 0 var(--spacing-sm) var(--spacing-md);
}

.sidebar-head .brand-logo {
  width: 1.5rem;
  height: 1.5rem;
}

.sidebar-head .brand-name {
  font-size: var(--text-base);
}

.sidebar-close {
  display: none;
}

.sidebar-create.btn {
  justify-content: flex-start;
  gap: 0.625rem;
  margin: 0 0 var(--spacing-md);
  padding: 0.5rem 0.625rem;
  font-size: var(--text-sm);
}

.sidebar-nav,
.sidebar-subnav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.45rem 0.625rem;
  border-radius: var(--radius-md);
  color: var(--muted-foreground);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-link:hover {
  background: var(--secondary);
  color: var(--foreground);
}

.sidebar-link[aria-current="page"] {
  background: var(--secondary);
  color: var(--foreground);
}

.sidebar-link:focus-visible,
.sidebar-create.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.sidebar-link .icon {
  flex-shrink: 0;
}

.sidebar-nav-admin {
  margin-top: var(--spacing-md);
}

/* Admin mode: the way back, and the group names */
.sidebar-back {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--spacing-md);
  padding: 0.45rem 0.625rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--muted-foreground);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
}

.sidebar-back:hover {
  color: var(--foreground);
  border-color: var(--border-hover);
}

.sidebar-back:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.sidebar-heading {
  margin: var(--spacing-md) 0 0.25rem;
  padding: 0 0.625rem;
  color: var(--muted-foreground);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sidebar-foot {
  margin-top: auto;
  padding-top: var(--spacing-md);
}

.topbar {
  display: none;
}

/* ─── User menu ─────────────────────────────────────────────── */
.user-menu {
  position: relative;
}

.user-button {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--foreground);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.user-button:hover,
.user-button[aria-expanded="true"] {
  background: var(--secondary);
}

.user-button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.user-button > .icon {
  flex-shrink: 0;
  color: var(--muted-foreground);
}

.avatar {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-full);
  background: var(--status-active-bg);
  color: var(--status-active-text);
  font-size: var(--text-xs);
  font-weight: 600;
}

.user-meta {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}

.user-name {
  overflow: hidden;
  font-size: var(--text-sm);
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-role {
  font-size: var(--text-xs);
  color: var(--muted-foreground);
}

.user-menu-list {
  position: absolute;
  z-index: 50;
  display: flex;
  flex-direction: column;
  min-width: 12rem;
  padding: 0.3rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.user-menu-sidebar .user-menu-list {
  left: 0;
  right: 0;
  bottom: calc(100% + 0.4rem);
}

.user-menu-header .user-menu-list {
  right: 0;
  top: calc(100% + 0.4rem);
}

.user-menu-form {
  display: contents;
}

.user-menu-list [role="menuitem"] {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 0;
  border-radius: var(--radius-md);
  background: none;
  color: var(--foreground);
  font: inherit;
  font-size: var(--text-sm);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.user-menu-list [role="menuitem"]:hover,
.user-menu-list [role="menuitem"]:focus-visible {
  background: var(--secondary);
  outline: none;
}

.user-menu-list .icon,
.user-menu-list [data-theme-icon] {
  display: inline-flex;
  color: var(--muted-foreground);
}

[data-theme-icon] svg {
  width: 16px;
  height: 16px;
}

/* ─── Public: slim header ───────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--background) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  max-width: 80rem;
  margin: 0 auto;
  padding: 0.7rem var(--spacing-md);
}

.site-header-actions {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: var(--spacing-sm);
}

.user-menu-header .user-button {
  width: auto;
  padding: 0.2rem;
}

.user-menu-header .user-meta,
.user-menu-header .user-button > .icon {
  display: none;
}

/* ─── Small screens: the sidebar becomes a drawer ───────────── */
@media (max-width: 1023.98px) {
  body.app {
    display: block;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    width: min(18rem, 85vw);
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    visibility: hidden;
    /* Hidden (out of the tab order) only once it has slid away */
    transition: transform var(--transition-base), visibility 0s linear 0.2s;
  }

  body.sidebar-open {
    overflow: hidden;
  }

  /* Visible at once, so focus can move into it */
  body.sidebar-open .sidebar {
    transform: none;
    visibility: visible;
    transition: transform var(--transition-base), visibility 0s;
  }

  .sidebar-close {
    display: inline-flex;
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 55;
    background: var(--modal-overlay-bg);
  }

  .topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.55rem var(--spacing-md);
    background: color-mix(in srgb, var(--background) 85%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
  }

  .topbar .icon-btn {
    color: var(--foreground);
  }
}

@media (max-width: 400px) {
  .site-header-inner {
    padding-inline: 0.75rem;
    gap: var(--spacing-sm);
  }

  .site-header-actions {
    gap: 0.25rem;
  }

  .site-header-actions .btn-small {
    padding-inline: 0.65rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sidebar {
    transition: none;
  }
}