/*
 * shell.css — Application shell: header, primary navigation, page layout,
 * toast/flash system, and role badge (Session 6: Application Shell).
 *
 * Token-driven against tokens.css (D5). Loaded after tokens.css and
 * app.css in base.html. Replaces the ad-hoc portal-header/portal-main/
 * portal-flash/portal-footer styles in app.css for the shell chrome;
 * page-level classes (portal-table, portal-btn, etc.) remain in app.css.
 *
 * Design references: master prompt §8 (light, spacious, refined),
 * §10 (dynamic interaction), §26 (permission legibility without clutter),
 * §30 (responsive), §31 (accessibility).
 */

/* ========================================================================
   Layout shell
   ======================================================================== */

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Skip-to-content link (accessibility §31) */
.skip-link {
  position: absolute;
  top: -100vh;
  left: var(--space-4);
  z-index: var(--z-toast);
  background: var(--color-surface);
  color: var(--color-accent);
  border: var(--border-1);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  text-decoration: none;
  box-shadow: var(--shadow-pop);
  transition: top var(--dur-fast) var(--ease-standard);
}

.skip-link:focus {
  top: var(--space-3);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Screen-reader-only utility (accessibility §31) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive table scroll wrapper (accessibility §30) */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.app-main {
  flex: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  width: 100%;
  animation: content-in var(--dur-base) var(--ease-standard);
}

@keyframes content-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.app-main--wide {
  max-width: 1280px;
}

/* Fluid variant: no max-width cap, ~1/2-inch (3rem) side padding.
   Used on data-heavy pages (e.g. the Applications grid) so wide
   monitors show more columns with minimal whitespace. */
.app-main--fluid {
  max-width: none;
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.app-footer {
  border-top: var(--border-1);
  padding: var(--space-4);
  text-align: center;
  color: var(--color-fg-muted);
  font-size: var(--fs-sm);
}

/* ========================================================================
   Header
   ======================================================================== */

.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-surface);
  border-bottom: var(--border-1);
  box-shadow: var(--shadow-sm);
}

.app-header__bar {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.app-header__bar--wide {
  max-width: 1280px;
}

/* Fluid variant: no max-width cap, ~1/2-inch (3rem) side padding.
   Pairs with .app-main--fluid so the header aligns with full-width
   content on data-heavy pages. */
.app-header__bar--fluid {
  max-width: none;
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

/* On narrow screens the 3rem fluid padding is excessive; fall back to
   the default 1rem horizontal padding. */
@media (max-width: 768px) {
  .app-main--fluid,
  .app-header__bar--fluid {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

/* Brand */

.app-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-fg);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  white-space: nowrap;
  flex-shrink: 0;
}

.app-header__brand:hover {
  color: var(--color-accent);
}

.app-header__logo {
  color: var(--color-accent);
  line-height: 0;
  flex-shrink: 0;
}

.app-header__brand-text {
  display: none;
}

@media (min-width: 480px) {
  .app-header__brand-text {
    display: inline;
  }
}

/* Primary navigation */

.app-nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
  flex: 1;
}

.app-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-fg-muted);
  font-size: var(--fs-md);
  font-weight: var(--fw-normal);
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}

.app-nav__link:hover {
  background: var(--color-surface-2);
  color: var(--color-fg);
}

.app-nav__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.app-nav__link--active {
  background: var(--color-info-bg);
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
}

.app-nav__link--active:hover {
  background: var(--color-info-bg);
  color: var(--color-accent);
}

/* Separator link — distinctly spaced from the preceding nav links,
   centered in the remaining space between them and the user area. */
.app-nav__link--separator {
  margin-left: auto;
  margin-right: auto;
}

/* "Tools" group label — a divider + caption before the design/dev links (WP9). */
.app-nav__group-label {
  display: inline-flex;
  align-items: center;
  margin-left: var(--space-2);
  padding-left: var(--space-3);
  border-left: var(--border-1);
  color: var(--color-fg-muted);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (min-width: 768px) {
  .app-nav {
    display: flex;
  }
}

/* Mobile nav toggle */

.app-header__menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: var(--border-1);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-fg);
  cursor: pointer;
  padding: 0;
}

.app-header__menu-btn:hover {
  background: var(--color-surface-2);
}

.app-header__menu-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

@media (min-width: 768px) {
  .app-header__menu-btn {
    display: none;
  }
}

/* User area */

.app-header__user-area {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.app-header__user-info {
  display: none;
  align-items: center;
  gap: var(--space-2);
}

@media (min-width: 480px) {
  .app-header__user-info {
    display: flex;
  }
}

.app-header__user-name {
  font-size: var(--fs-sm);
  color: inherit;
  font-weight: inherit;
  max-width: 10rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Role badge (§26 — permission legibility without clutter) */

.role-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: capitalize;
  white-space: nowrap;
}

.role-badge::before {
  content: "";
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.role-badge--administrator {
  background: linear-gradient(135deg, var(--color-admin-badge-from) 0%, var(--color-admin-badge-to) 100%);
  color: #ffffff;
  box-shadow: 0 1px 4px rgba(109, 40, 217, 0.35);
}
.role-badge--administrator::before {
  content: "\2605";
  background: transparent;
  font-size: 0.7rem;
  line-height: 1;
}

.role-badge--owner {
  background: var(--color-success-bg);
  color: var(--color-success-fg);
}

.role-badge--viewer {
  background: var(--color-neutral-bg);
  color: var(--color-neutral-fg);
}

/* Logout button */

.app-header__logout-btn {
  background: transparent;
  color: var(--color-fg-muted);
  border: var(--border-1);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  font: inherit;
  font-size: var(--fs-sm);
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}

.app-header__logout-btn:hover {
  background: var(--color-surface-2);
  color: var(--color-fg);
}

.app-header__logout-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Login link (anchor variant) needs the same focus treatment */
a.app-header__logout-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Profile button (icon + login name — encapsulates the profile link) */

.app-header__profile-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--color-fg-muted);
  border: var(--border-1);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-3);
  text-decoration: none;
  font: inherit;
  font-size: var(--fs-sm);
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}

.app-header__profile-btn:hover {
  background: var(--color-surface-2);
  color: var(--color-fg);
}

.app-header__profile-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.app-header__profile-btn--active {
  background: var(--color-info-bg);
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
}

.app-header__profile-btn--active:hover {
  background: var(--color-info-bg);
  color: var(--color-accent);
}

/* Icon button (admin gear — compact, icon-only, right of logout) */

.app-header__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: transparent;
  color: var(--color-fg-muted);
  border: var(--border-1);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}

.app-header__icon-btn:hover {
  background: var(--color-surface-2);
  color: var(--color-fg);
}

.app-header__icon-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.app-header__icon-btn--active {
  background: var(--color-info-bg);
  color: var(--color-accent);
}

.app-header__icon-btn--active:hover {
  background: var(--color-info-bg);
  color: var(--color-accent);
}

/* ========================================================================
   Mobile nav panel (collapses below 768px)
   ======================================================================== */

.app-nav-mobile {
  display: none;
  border-top: var(--border-1);
  background: var(--color-surface);
  padding: var(--space-2) var(--space-4);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height var(--dur-base) var(--ease-standard),
    opacity var(--dur-base) var(--ease-standard);
}

.app-nav-mobile--open {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  max-height: 30rem;
  opacity: 1;
}

.app-nav-mobile__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-fg);
  font-size: var(--fs-md);
}

.app-nav-mobile__link:hover {
  background: var(--color-surface-2);
}

.app-nav-mobile__link--active {
  background: var(--color-info-bg);
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
}

.app-nav-mobile__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* "Tools" group label — a top-divider caption before the design/dev links (WP9). */
.app-nav-mobile__group-label {
  display: block;
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-4) 0;
  border-top: var(--border-1);
  color: var(--color-fg-muted);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (min-width: 768px) {
  .app-nav-mobile {
    display: none !important;
  }
}

/* ========================================================================
   Toast / flash notifications (§10 — dynamic interaction)
   ======================================================================== */

.toast-region {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: calc(100vw - 2 * var(--space-4));
}

.toast {
  pointer-events: auto;
  background: var(--color-surface);
  border: var(--border-1);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 18rem;
  max-width: 24rem;
  animation: toast-in var(--dur-base) var(--ease-standard);
}

.toast--success {
  border-left: 3px solid var(--color-success-fg);
}

.toast--error {
  border-left: 3px solid var(--color-danger-fg);
}

.toast--warning {
  border-left: 3px solid var(--color-warn-fg);
}

.toast--info {
  border-left: 3px solid var(--color-info-fg);
}

.toast__message {
  flex: 1;
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
  color: var(--color-fg);
}

.toast__close {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--color-fg-muted);
  cursor: pointer;
  padding: 0;
  font-size: var(--fs-md);
  line-height: 1;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.toast__close:hover {
  color: var(--color-fg);
}

.toast__close:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.toast.is-leaving {
  animation: toast-out var(--dur-base) var(--ease-standard) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(1rem);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(1rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .toast {
    animation: none;
  }
  .toast.is-leaving {
    animation: none;
    opacity: 0;
  }
  .app-main {
    animation: none;
  }
  .app-nav-mobile {
    transition: none;
  }
}

/* ========================================================================
   Global dialog / slideover host
   ======================================================================== */

/*
 * The native <dialog> elements rendered by component macros (dialog(),
 * slideover()) are placed by pages inside {% block content %}. No global
 * host container is needed — the native <dialog> element handles its own
 * top-layer positioning. This section is intentionally minimal; it exists
 * to document that the shell does NOT add a competing overlay host.
 */