/* ======================================================================
   APP LAYOUT — Evident Technologies
   Structural styles for the app.njk layout.
   Feature-rich, context-aware layout for authenticated users.
   Uses Gemstone Design Tokens from tokens.css.
   ====================================================================== */

/* ── App shell (grid layout) ────────────────────────────────────────── */

.app-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: 1fr;
  min-height: 100vh;
  background: var(--surface-base, #f4f7ff);
}

@media (width >= 1024px) {
  .app-shell {
    grid-template-columns: 280px 1fr;
    grid-template-rows: auto 1fr;
  }
}

/* ── App header (sticky) ────────────────────────────────────────────── */

.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky, 100);
  grid-column: 1 / -1;
  border-block-end: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
  background: var(--glass-bg-strong, rgb(255 255 255 / 92%));
  backdrop-filter: blur(16px);
}

.app-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  max-width: 100%;
}

/* ── App header logo ─────────────────────────────────────────────── */

.app-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
  margin-right: 0.25rem;
}

.app-header__logo-mark {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.app-header__logo-text {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--color-sapphire, #58a6ff), var(--color-emerald, #3fb950));
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

@media (width < 640px) {
  .app-header__logo-text {
    display: none;
  }
}

.app-header__left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 0;
}

.app-header__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ── Breadcrumb ─────────────────────────────────────────────────────── */

.app-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #5a6080);
}

.app-breadcrumb__link {
  color: var(--color-primary, #1f3a99);
  text-decoration: none;
}

.app-breadcrumb__link:hover {
  text-decoration: underline;
}

.app-breadcrumb__separator {
  color: var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 20%, white));
}

.app-breadcrumb__current {
  font-weight: 600;
  color: var(--color-text, #1a2040);
}

/* ── Workspace selector ─────────────────────────────────────────────── */

.app-header__workspace-selector {
  position: relative;
}

.app-header__workspace-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
  border-radius: var(--radius-md, 0.75rem);
  background: var(--glass-bg-strong, rgb(255 255 255 / 76%));
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text, #1a2040);
  cursor: pointer;
  transition: border-color 180ms ease;
}

.app-header__workspace-button:hover {
  border-color: var(--color-primary, #1f3a99);
}

/* ── Tier badge ─────────────────────────────────────────────────────── */

.app-tier-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full, 999px);
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--gem-sapphire, linear-gradient(135deg, #0a1a6e, #1f3a99 35%, #3d64cc 60%, #128 100%));
  color: var(--gem-sapphire-text, #d0dcff);
}

/* ── Notifications ──────────────────────────────────────────────────── */

.app-header__notifications {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  border-radius: var(--radius-full, 999px);
  background: transparent;
  color: var(--color-text-muted, #5a6080);
  cursor: pointer;
  transition: background 180ms ease;
}

.app-header__notifications:hover {
  background: color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 6%, transparent);
}

.app-header__notifications-badge {
  position: absolute;
  top: 0.125rem;
  right: 0.125rem;
  min-width: 1rem;
  height: 1rem;
  padding: 0 0.25rem;
  border-radius: var(--radius-full, 999px);
  background: var(--color-red-500, #ef4444);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  line-height: 1rem;
  text-align: center;
}

/* ── Account menu ──────────────────────────────────────────────────── */

.app-header__account-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  border-radius: var(--radius-full, 999px);
  background: transparent;
  color: var(--color-text-muted, #5a6080);
  cursor: pointer;
  transition: background 180ms ease;
}

.app-header__account-menu:hover {
  background: color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 6%, transparent);
}

/* ── Sidebar ────────────────────────────────────────────────────────── */

.app-sidebar {
  display: none;
  flex-direction: column;
  border-inline-end: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
  background: var(--surface-card, rgb(255 255 255 / 76%));
  overflow-y: auto;
}

@media (width >= 1024px) {
  .app-sidebar {
    display: flex;
  }
}

.app-sidebar.is-open {
  display: flex;
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay, 200);
  width: 280px;
  box-shadow: 4px 0 24px rgb(0 0 0 / 12%);
}

.app-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-block-end: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
}

.app-sidebar__title {
  font-size: 0.8125rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted, #5a6080);
  margin: 0;
}

.app-sidebar__new-case {
  padding: 0.375rem 0.75rem;
  border: none;
  border-radius: var(--radius-md, 0.75rem);
  background: var(--color-primary, #1f3a99);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 180ms ease;
}

.app-sidebar__new-case:hover {
  background: color-mix(in srgb, var(--color-primary, #1f3a99) 80%, black);
}

.app-sidebar__search {
  padding: 0.75rem 1rem;
}

.app-sidebar__search-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
  border-radius: var(--radius-md, 0.75rem);
  font-size: 0.8125rem;
  background: var(--surface-base, #f4f7ff);
}

.app-sidebar__search-input:focus {
  outline: 2px solid var(--color-primary, #1f3a99);
  outline-offset: 1px;
}

.app-sidebar__cases {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.app-sidebar__cases-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.app-sidebar__footer {
  padding: 0.75rem 1rem;
  border-block-start: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
}

.app-sidebar__settings {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: var(--radius-md, 0.75rem);
  background: transparent;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #5a6080);
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: background 180ms ease;
}

.app-sidebar__settings:hover {
  background: color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 6%, transparent);
}

/* ── Nav tabs ───────────────────────────────────────────────────────── */

.app-nav-tabs {
  display: flex;
  gap: 0;
  border-block-end: 1px solid var(--border-subtle, color-mix(in srgb, var(--gem-labradorite-flat, #2d3f6e) 10%, white));
  background: var(--glass-bg-strong, rgb(255 255 255 / 92%));
  backdrop-filter: blur(16px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  grid-column: 1 / -1;
}

.app-nav-tabs__link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted, #5a6080);
  text-decoration: none;
  white-space: nowrap;
  border-block-end: 2px solid transparent;
  transition:
    color 180ms ease,
    border-color 180ms ease;
}

.app-nav-tabs__link:hover {
  color: var(--color-text, #1a2040);
}

.app-nav-tabs__link[aria-current="page"] {
  color: var(--color-primary, #1f3a99);
  border-block-end-color: var(--color-primary, #1f3a99);
}

.app-nav-tabs__lock-icon {
  opacity: 0.4;
}

/* ── Main content area ─────────────────────────────────────────────── */

.app-main {
  padding: 1.5rem;
  overflow-y: auto;
}

@media (width >= 1024px) {
  .app-main {
    padding: 2rem;
  }
}

/* ── Sidebar overlay (mobile) ───────────────────────────────────────── */

.app-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-overlay, 200) - 1);
  background: rgb(0 0 0 / 40%);
}

.app-sidebar-overlay.is-visible {
  display: block;
}

/* ── Reduced motion ─────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .app-header__workspace-button,
  .app-sidebar__new-case,
  .app-sidebar__settings,
  .app-nav-tabs__link,
  .app-header__notifications,
  .app-header__account-menu {
    transition: none;
  }
}