/* Service navigation shares the existing Aris palette and original artwork. */
.space-heading-label { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
#chatSpace[hidden], #librarySpace[hidden], #learningSpace[hidden], #serviceNavigation[hidden],
#chatReference[hidden], #chatDrafts[hidden], .space-question-controls[hidden], .preset-button[hidden] { display: none !important; }
.service-shell .header { display: flex; align-items: center; flex-wrap: wrap; gap: var(--brand-space-4); padding: 10px 24px; flex-shrink: 0; background: var(--parchment); border-bottom: 1px solid var(--brand-border); }
body.service-shell .header-logo { height: 60px; width: auto; }
.service-shell .header-left { flex: 0 0 auto; }
.service-shell .auth-section { margin-left: auto; }
.service-navigation { display: flex; gap: var(--brand-space-2); flex-wrap: wrap; }
.service-navigation button, .space-button, .chat-reference button, .resource-ask-button { font: inherit; color: var(--brown-dark); cursor: pointer; border: 1px solid var(--brand-border); border-radius: var(--brand-radius-md); padding: 9px 14px; min-height: 42px; background: var(--brand-surface); }
.service-navigation button { border-color: transparent; background: transparent; font-weight: 600; }
.standalone-service-navigation { position: relative; z-index: 1; padding: 10px 24px; background: var(--brand-surface); }
.standalone-service-navigation a { color: var(--brand-primary-text); text-decoration: none; padding: 8px 14px; border-radius: var(--brand-radius-md); }
.standalone-service-navigation a[aria-current="page"] { background: var(--brand-soft); }
.service-navigation button[aria-pressed="true"], .space-button[aria-pressed="true"] { color: var(--brand-primary-text); background: var(--brand-soft); border-color: var(--brand-border); }
.space-button:hover, .resource-ask-button:hover { background: var(--brand-soft); }
.space-button.space-primary { background: var(--brand-primary); color: var(--brand-surface); border-color: var(--brand-primary); }
.space-button:disabled { opacity: .55; cursor: wait; }
.space-quiet { background: transparent; border-color: transparent; }
.service-shell .sidebar { position: absolute; top: 0; height: 100%; width: 240px; padding-bottom: 0; }
.service-shell .sidebar.collapsed { width: 0; }
.service-shell .sidebar:not(.collapsed) ~ .chat-container { margin-left: 240px; width: calc(100% - 240px); }
.service-shell .toggle-sidebar-button { position: absolute; top: 12px; transform: none; font-size: 16px; padding: var(--brand-space-3); }
.service-shell .sidebar:not(.collapsed) ~ .toggle-sidebar-button { left: 240px; }
.service-shell .chat-container { --chat-content-max: 880px; background: transparent; }
.service-shell .main-wrapper { background: transparent; }
.service-shell .welcome-mascot { max-height: 125px; width: auto; }
.service-shell .welcome-hero { padding-top: 24px; padding-bottom: 10px; }
.service-shell .quick-actions { text-align: center; padding-top: 0; }
.service-shell .preset-buttons { justify-content: center; }
.space-question-controls { display: flex; flex-wrap: wrap; gap: var(--brand-space-2); justify-content: center; margin: 8px 0 12px; }
.space-question-controls .space-button { font-size: 14px; }
.service-shell.has-chat-reference .welcome-hero, .service-shell.has-chat-reference .input-character { display: none; }
.service-shell .conversation-item:focus-within .conversation-delete, .service-shell .conversation-delete:focus-visible { opacity: 1; }
#chatDrafts { padding: var(--brand-space-3); border-bottom: 1px solid var(--brand-border); max-height: 30%; overflow: auto; }
#chatDrafts h3 { font-size: 12px; color: var(--brown-light); padding: 4px; }
.chat-draft-button { display: block; width: 100%; border: 0; border-radius: var(--brand-radius-md); padding: var(--brand-space-3); background: var(--brand-soft); text-align: left; margin: 5px 0; font: inherit; overflow-wrap: anywhere; cursor: pointer; }
.chat-reference { display: flex; align-items: center; gap: var(--brand-space-3); flex-wrap: wrap; background: var(--brand-surface); border: 1px solid var(--brand-border); padding: 12px 15px; border-radius: var(--brand-radius-lg); margin-bottom: 10px; }
.chat-reference > div { flex: 1; min-width: 160px; overflow-wrap: anywhere; }
.chat-reference small, .chat-reference strong { display: block; }
.chat-reference small { color: var(--brown-light); font-size: 12px; }
.chat-reference button { font-size: 13px; }
.message-reference { margin-top: 12px; border-top: 1px solid currentColor; padding-top: 8px; font-size: 13px; opacity: .85; }
.service-page { flex: 1; min-height: 0; width: min(1120px, 100%); margin: 0 auto; padding: var(--brand-space-6); overflow-y: auto; position: relative; z-index: 1; }
.service-page h1 { font-size: 26px; margin: 0 0 7px; }
.service-page h2 { font-size: 19px; margin: 0 0 10px; }
.service-page h3 { font-size: 17px; margin: 0 0 8px; }
.space-page-heading { display: flex; justify-content: space-between; align-items: center; gap: var(--brand-space-3); margin-bottom: 24px; }
.space-page-heading p { color: var(--brand-muted); }
.space-local-nav { display: flex; gap: var(--brand-space-2); flex-wrap: wrap; margin-bottom: 18px; }
.space-notice { font-size: 13px; color: var(--brand-muted); line-height: 1.65; margin: 12px 0; }
.space-empty { padding: 30px 20px; border-radius: var(--brand-radius-lg); background: var(--parchment); margin: 12px 0; }
.library-loans { background: var(--brand-surface); border-radius: var(--brand-radius-lg); padding: 0 22px; }
.library-loan { display: flex; justify-content: space-between; align-items: center; gap: var(--brand-space-4); padding: 20px 0; border-bottom: 1px solid var(--brand-border); }
.library-loan:last-child { border-bottom: 0; }
.library-loan > div { min-width: 0; overflow-wrap: anywhere; }
.library-loan h2 { font-size: 17px; }
.library-loan .space-notice { margin: 5px 0; }
.library-loan button { flex-shrink: 0; }
.library-book-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--brand-space-4); }
.library-book-card { background: var(--brand-surface); border-radius: var(--brand-radius-lg); padding: var(--brand-space-4); display: flex; flex-direction: column; gap: var(--brand-space-3); overflow-wrap: anywhere; }
.library-book-card > img { height: 130px; width: 92px; object-fit: contain; object-position: left; }
.library-book-card p { color: var(--brown-light); font-size: 14px; }
.library-book-card .space-actions { margin-top: auto; }
.space-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--brand-space-3); }
.space-actions a { color: var(--brand-primary-text); }
.learning-space { flex: 1; min-height: 0; position: relative; z-index: 1; display: flex; }
.learning-space iframe { border: 0; width: 100%; height: 100%; flex: 1; background: transparent; }
.space-status { color: var(--brand-text); background: var(--brand-soft); font-size: 13px; padding: 8px 20px; position: relative; z-index: 2; }
.space-status:empty { display: none; }
.resource-handoff { border: 1px solid var(--brand-border); border-radius: var(--brand-radius-lg); padding: var(--brand-space-6); width: min(550px, calc(100% - 32px)); margin: auto; color: var(--brown-dark); background: var(--brand-surface); box-shadow: 0 20px 80px #193c6b44; }
.resource-handoff::backdrop { background: #17344f66; }
.resource-handoff h2 { font-size: 22px; margin-bottom: 14px; }
.resource-handoff p { margin-bottom: 24px; overflow-wrap: anywhere; }
.resource-ask-button { font-size: 13px; margin: 8px 0; }
.resource-item-content { display: grid; gap: .3rem; color: inherit; text-decoration: none; }
a.resource-item-content:hover strong, a.resource-item-content:focus-visible strong { text-decoration: underline; }
.service-embedded .student-header, .service-embedded .teacher-header { display: none; }
.service-embedded .student-scenery, .service-embedded .page-bg { display: none; }
.service-embedded body { background: transparent; }
.service-embedded .student-dashboard main { max-width: 1120px; }
.service-embedded .teacher-dashboard { background: transparent; }
.embedded-service-tools { display: flex; justify-content: flex-end; margin-bottom: 8px; }
.service-embedded .course-list > [role="listitem"] { display: flex; flex-direction: column; gap: var(--brand-space-2); }
.service-embedded .course-list .course-button { height: auto; flex: 1; }
.service-embedded .course-list .resource-ask-button { align-self: flex-start; margin: 0 0 8px; }
@media (max-width: 1000px) {
  .service-shell .header { gap: var(--brand-space-2); padding: 8px 16px; }
  .service-navigation { order: 3; width: 100%; justify-content: center; }
  .service-navigation button { flex: 1; }
}
@media (max-width: 768px) {
  .service-shell .header { padding: 5px 12px 9px; }
  body.service-shell .header-logo { height: 44px; }
  .service-shell .sidebar:not(.collapsed) ~ .chat-container { margin-left: 0; width: 100%; }
  .service-shell .sidebar { width: min(280px, calc(100% - 46px)); }
  .service-shell .sidebar:not(.collapsed) ~ .toggle-sidebar-button { left: min(280px, calc(100% - 46px)); }
  .service-navigation button { padding: 9px 5px; font-size: 13px; min-height: 44px; }
  .service-page { padding: 20px 15px; }
  .space-page-heading { align-items: flex-start; }
  .space-page-heading h1 { font-size: 23px; }
  .space-page-heading p { font-size: 14px; }
  .library-book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .library-loan { flex-direction: column; align-items: stretch; gap: var(--brand-space-2); }
  .library-loan > button { align-self: flex-start; }
  .chat-reference { margin: 0 0 8px; padding: var(--brand-space-3); gap: var(--brand-space-2); }
  .chat-reference > div { flex-basis: 100%; }
  .chat-reference button, .space-button, .resource-ask-button { min-height: 44px; }
  .resource-handoff .space-actions button { width: 100%; }
  .service-shell .conversation-delete { opacity: 1; }
}
@media (max-width: 480px) { .library-book-grid { grid-template-columns: 1fr; } .space-local-nav .space-button { flex: 1; padding: 9px 7px; font-size: 13px; } }