html {
  font-size: 16px;
  min-height: 100%;
  background: var(--pl-page);
}

body.app-body {
  display: block;
  min-height: 100%;
  margin: 0;
  color: var(--pl-ink);
  background-color: var(--pl-page);
  --pl-radius-sm: 6px;
  --pl-radius-md: 8px;
  --pl-radius-lg: 10px;
  --pl-radius-xl: 12px;
  --pl-shadow-soft: none;
  --pl-shadow-sm: none;
  --pl-shadow-md: 0 4px 14px rgb(0 0 0 / 8%);
  --pl-heading-size: clamp(1.5rem, 2.5vw, 1.85rem);
  background-image: none;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  text-shadow: none;
  overflow-x: hidden;
}

.app-body .text-center {
  width: 100%;
}

.app-body .cover-container {
  width: 100%;
  max-width: none;
  min-height: 100vh;
  padding: 0 !important;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 0.65rem 0.9rem;
  border-radius: var(--pl-radius-sm);
  color: var(--pl-on-accent) !important;
  background: var(--pl-accent);
  font-weight: 800;
  transform: translateY(-150%);
  transition: transform var(--pl-motion-fast) var(--pl-ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-body .masthead,
.app-body .site-header {
  position: relative;
  z-index: 50;
  margin: 0;
}

.app-body .navbar,
.app-body .site-nav {
  min-height: 64px;
  margin: 0;
  padding: 4px max(16px, calc((100vw - 1240px) / 2));
  border: 0;
  border-bottom: 1px solid var(--pl-border);
  border-radius: 0;
  background: var(--pl-surface) !important;
  box-shadow: none;
  text-align: left;
  backdrop-filter: blur(18px);
}

.app-body .navbar .container {
  max-width: none;
  padding: 4px 10px;
  border-radius: 0;
}

.app-body .navbar-brand {
  gap: 0.15rem;
  color: var(--pl-ink);
  letter-spacing: -0.04em;
}

.app-body .navbar-brand:hover,
.app-body .navbar-brand:focus-visible {
  color: var(--pl-ink);
}

.app-body .navbar-brand img {
  display: block;
  object-fit: contain;
  transform: scaleX(-1);
}

.app-body .brand-name {
  font-size: 1.1rem;
  font-weight: 760;
}

.app-body .brand-dot {
  color: var(--pl-accent);
}

.app-body .navbar-nav {
  align-items: center;
  gap: 6px;
}

.nav-logout-form {
  margin: 0;
}

.nav-logout-form .nav-link {
  width: 100%;
  border: 0;
  background: transparent;
}

.app-body .navbar-dark .navbar-nav .nav-link {
  padding: 9px 12px;
  border-radius: var(--pl-radius-sm);
  color: var(--pl-nav-muted);
  font-size: 0.9rem;
  font-weight: 650;
  transition: color var(--pl-motion-fast) var(--pl-ease), background var(--pl-motion-fast) var(--pl-ease), transform var(--pl-motion-fast) var(--pl-ease);
}

.app-body .navbar-dark .navbar-nav .nav-link:hover,
.app-body .navbar-dark .navbar-nav .nav-link:focus-visible,
.app-body .navbar-dark .navbar-nav .nav-link.active {
  color: var(--pl-ink);
  background: var(--pl-nav-hover);
}

.app-body .navbar-dark .navbar-nav .nav-link-cta {
  margin-left: 0;
  padding-inline: 17px;
  color: var(--pl-on-accent);
  background: var(--pl-accent);
}

.app-body .navbar-dark .navbar-nav .nav-link-cta:hover,
.app-body .navbar-dark .navbar-nav .nav-link-cta:focus-visible,
.app-body .navbar-dark .navbar-nav .nav-link-cta.active {
  color: var(--pl-on-accent);
  background: var(--pl-accent-hover);
  transform: none;
}

.nav-account {
  position: relative;
}

.nav-account > summary {
  display: flex;
  align-items: center;
  gap: 9px;
  list-style: none;
  cursor: pointer;
}

.nav-account > summary::-webkit-details-marker {
  display: none;
}

.nav-account > summary::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.nav-account[open] > summary::after {
  transform: translateY(1px) rotate(225deg);
}

.account-links {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 240px;
  max-width: calc(100vw - 48px);
  margin: 0;
  padding: 8px;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-md);
  background: var(--pl-nav-bg);
  box-shadow: var(--pl-shadow-md);
  backdrop-filter: blur(18px);
  list-style: none;
}

.app-body .account-identity {
  overflow: hidden;
  padding: 7px 13px 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--pl-border);
  color: var(--pl-muted);
  font-size: 0.85rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-body .navbar-nav .account-links .nav-link {
  width: 100%;
  border-radius: var(--pl-radius-sm);
  text-align: left;
}

.app-body .navbar-nav .account-links .nav-link[aria-current="page"] {
  color: var(--pl-ink);
  background: var(--pl-nav-hover);
}

.landing-theme-item {
  display: flex;
  align-items: center;
}

.landing-mobile-theme-slot,
.landing-nav-controls {
  display: none;
}

.app-theme-toggle {
  display: inline-grid;
  width: 40px;
  height: 40px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-sm);
  color: var(--pl-nav-muted);
  background: var(--pl-nav-hover);
  cursor: pointer;
}

.app-theme-toggle:hover,
.app-theme-toggle:focus-visible {
  color: var(--pl-ink);
  border-color: var(--pl-border-strong);
  background: var(--pl-nav-hover);
  transform: none;
}

.app-theme-icon {
  grid-area: 1 / 1;
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.app-theme-icon-sun,
:root[data-theme="light"] .app-theme-icon-moon {
  display: none;
}

:root[data-theme="light"] .app-theme-icon-sun {
  display: block;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .app-theme-icon-moon {
    display: none;
  }

  :root:not([data-theme="dark"]) .app-theme-icon-sun {
    display: block;
  }
}

.app-body .navbar-toggler {
  border-color: var(--pl-border-strong);
}

:root[data-theme="light"] .app-body .navbar-toggler-icon {
  filter: invert(1) brightness(0.38);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .app-body .navbar-toggler-icon {
    filter: invert(1) brightness(0.38);
  }
}

.site-flashes {
  position: relative;
  z-index: 40;
  width: min(34rem, calc(100% - 2rem));
  margin: var(--pl-space-3) auto 0;
}

.app-main {
  flex: 1 0 auto;
  width: min(100%, 1240px);
  margin: 0 auto;
  padding: 28px 24px 48px;
}

.app-body .inner.cover {
  width: min(100%, var(--pl-copy-width));
  margin: 0 auto;
  color: var(--pl-ink);
  text-align: left;
}

.app-body .inner.cover > img:first-child {
  display: block;
  width: 108px !important;
  height: auto;
  margin: 0 auto var(--pl-space-4);
}

.app-body .page-header h1,
.app-body .cover-heading,
.app-body h1,
.app-body h2,
.app-body h3 {
  color: var(--pl-ink);
  letter-spacing: -0.025em;
}

.app-body p,
.app-body small {
  color: var(--pl-muted);
}

.site-footer {
  flex: 0 0 auto;
  width: 100%;
  margin: auto 0 0;
  padding: var(--pl-space-5) var(--pl-space-4) var(--pl-space-4);
  color: var(--pl-muted);
  font-size: 0.82rem;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: min(100%, 1240px);
  margin-inline: auto;
  border-top: 1px solid var(--pl-border);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--pl-ink);
  font-weight: 700;
}

.site-footer-links {
  display: flex;
  justify-content: center;
  gap: var(--pl-space-4);
  margin-top: 0;
}

@media (max-width: 991.98px) {
  .app-body .navbar .container {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 10px;
  }

  .app-body .navbar-brand {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
    margin-right: 0;
  }

  .landing-nav-controls {
    display: flex;
    grid-column: 2;
    grid-row: 1;
    align-items: center;
    justify-self: end;
    gap: 7px;
  }

  .landing-mobile-theme-slot {
    display: flex;
  }

  .landing-mobile-theme-slot .app-theme-toggle,
  .app-body .navbar-toggler {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    padding: 0;
    border: 1px solid var(--pl-border);
    border-radius: var(--pl-radius-sm);
    background: var(--pl-nav-hover);
  }

  .app-body .navbar-toggler-icon {
    width: 18px;
    height: 18px;
    background-size: 18px 18px;
  }

  .app-body .navbar-collapse {
    grid-column: 1 / -1;
    grid-row: 2;
    padding-left: 0;
  }

  .app-body .navbar-nav {
    align-items: stretch;
    padding: 12px 0 5px;
  }

  .account-links {
    position: static;
    width: 100%;
    max-width: none;
    margin-top: 4px;
    box-shadow: none;
  }

  .app-body .navbar-dark .navbar-nav .nav-link-cta {
    margin: 5px 0 0;
    text-align: center;
  }

  .landing-theme-item {
    display: none;
  }
}

@media (max-width: 620px) {
  .app-body .cover-container {
    width: 100%;
  }

  .app-body .navbar {
    min-height: 64px;
  }

  .app-body .brand-name {
    font-size: 1.08rem;
  }

  .app-main {
    padding: 20px 16px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-body *,
  .app-body *::before,
  .app-body *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* One navigation surface: sidebar on desktop, compact disclosure on mobile. */
.app-body.workspace-body { height: 100dvh; overflow: hidden; }
.app-body.workspace-body .cover-container {
  position: relative;
  flex-direction: row !important;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  overflow: hidden;
  text-align: left;
}
.workspace-shell .workspace-navigation {
  display: flex;
  flex: 0 0 244px;
  min-width: 0;
  flex-direction: column;
  background: var(--pl-surface);
}
.workspace-shell .workspace-brandbar { display: flex; align-items: center; justify-content: space-between; padding: 20px 20px 16px; }
.workspace-shell .workspace-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--pl-ink); text-decoration: none; font-size: 15px; font-weight: 600; letter-spacing: -.02em; }
.workspace-shell .workspace-brand img { object-fit: contain; }
.workspace-shell .workspace-menu-toggle { display: none; }
.workspace-shell .workspace-nav { display: flex; flex: 1; min-height: 0; flex-direction: column; padding: 0 12px 12px; }
.workspace-shell .workspace-nav ul { list-style: none; padding: 0; margin: 0; }
.workspace-shell .workspace-destinations, .workspace-shell .workspace-conversations, .workspace-shell .account-links { display: grid; gap: 6px; }
.workspace-shell .workspace-nav a { color: var(--pl-muted); text-decoration: none; }
.workspace-shell .workspace-nav svg, .workspace-shell .workspace-menu-toggle svg { width: 18px; height: 18px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.workspace-shell .workspace-destinations svg, .workspace-shell .workspace-section-heading svg { color: var(--workspace-icon); }
.workspace-shell .workspace-destinations a { display: flex; align-items: center; gap: 12px; min-height: 42px; padding: 8px 12px; border-radius: 8px; font-size: 14px; }
.workspace-shell .workspace-nav a:hover, .workspace-shell .workspace-nav a[aria-current], .workspace-shell .workspace-nav a.is-current { background: var(--pl-nav-hover); color: var(--pl-ink); }
.workspace-shell .workspace-recents { flex: 1; min-height: 80px; overflow-y: auto; margin-top: 28px; }
.workspace-shell .workspace-section-heading { display: flex; align-items: center; justify-content: space-between; padding-left: 12px; }
.workspace-shell .workspace-section-heading h2 { margin: 0; color: var(--pl-faint); font-size: 12px; font-weight: 500; letter-spacing: 0; }
.workspace-shell .workspace-section-heading a { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 8px; }
.workspace-shell .workspace-section-heading svg { width: 16px; height: 16px; }
.workspace-shell .workspace-conversations a { display: grid; gap: 3px; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.workspace-shell .workspace-conversations a span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace-shell .workspace-conversations small { font-size: 12px; color: var(--pl-faint); }
.workspace-shell .workspace-conversations a[aria-current] { background: var(--pl-surface-soft); }
.workspace-shell .workspace-recents-empty { padding: 10px 12px; color: var(--pl-faint); font-size: 12px; line-height: 1.6; }
.workspace-shell .workspace-account { display: flex; align-items: center; gap: 8px; padding-top: 12px; margin-top: auto; }
.workspace-shell .nav-account { flex: 1; min-width: 0; }
.workspace-shell .nav-account > summary { min-height: 44px; padding: 10px 12px; border-radius: 8px; color: var(--pl-muted); font-size: 14px; font-weight: 400; }
.workspace-shell .nav-account > summary::after { margin-left: auto; }
.workspace-shell .nav-account > summary:hover { background: var(--pl-nav-hover); color: var(--pl-ink); }
.workspace-shell .account-links { z-index: 60; top: auto; bottom: calc(100% + 8px); left: 0; right: auto; width: 220px; background: var(--pl-nav-bg); }
.workspace-shell .workspace-nav .account-links { padding: 8px; }
.workspace-shell .account-links .nav-link { padding: 10px 12px; border-radius: 6px; color: var(--pl-muted); font-size: 14px; text-align: left; font-weight: 400; }
.workspace-shell .account-links .nav-link:hover { color: var(--pl-ink); background: var(--pl-nav-hover); }
.workspace-shell .workspace-policies { display: grid; gap: 6px; padding: 0; font-size: 12px; }
.workspace-shell .workspace-policies a { display: flex; align-items: center; min-height: 44px; padding: 10px 12px; border-radius: 6px; }
.workspace-shell .app-theme-toggle { width: 44px; height: 44px; border: 0; background: none; color: var(--pl-muted); }
.workspace-shell .app-theme-toggle:hover { background: var(--pl-nav-hover); color: var(--pl-ink); }
.workspace-shell :focus-visible { outline: 2px solid var(--pl-muted); outline-offset: 3px; }
.app-body.workspace-body .app-main { flex: 1; min-width: 0; min-height: 0; width: auto; height: 100%; padding: 0; margin: 0; overflow: auto; }
.app-body.workspace-body .workspace-content { padding: 32px; }
.workspace-body { --pl-heading-size: 1.125rem; }
.app-body.workspace-body .workspace-content h1 { color: var(--workspace-heading); font-size: var(--pl-heading-size); }
.workspace-shell .site-flashes { position: fixed; top: 8px; left: calc(50% + 122px); transform: translateX(-50%); max-width: calc(100% - 280px); }
.app-body.workspace-body .learning-thread { --practice-header-control-size: 2.75rem; --practice-solution-control-size: 2.75rem; display: flex; flex-direction: column; width: 100%; max-width: none; height: 100%; min-height: 0; margin: 0; }
.app-body.workspace-body .learning-thread .practice-header { grid-template-columns: minmax(0, 1fr) auto; }
.workspace-shell .practice-heading-copy { min-width: 0; }
.app-body.workspace-body .learning-thread .practice-back-link { display: flex; width: fit-content; max-width: 100%; gap: 6px; margin: 0 0 4px; font-size: 12px; font-weight: 400; }
.app-body.workspace-body .learning-thread .practice-header__status { flex-wrap: nowrap; }
.workspace-shell .learning-thread .practice-review-badge { height: auto; min-height: 0; padding: 4px 8px; border: 0; border-radius: 4px; color: var(--pl-muted); background: var(--pl-nav-hover); font-size: 12px; font-weight: 400; }
.app-body.workspace-body .learning-thread .practice-completion__control, .app-body.workspace-body .learning-thread .practice-question-navigation__control { border: 0; border-radius: 8px; background: none; color: var(--pl-muted); font-weight: 400; }
.app-body.workspace-body .learning-thread .practice-completion__control:hover, .app-body.workspace-body .learning-thread .practice-question-navigation__control:hover { background: var(--pl-nav-hover); color: var(--pl-ink); transform: none; }
.app-body.workspace-body .learning-thread .practice-completion__control--complete { background: var(--pl-nav-hover); color: var(--pl-ink); }
.app-body.workspace-body .learning-thread .practice-tutor { display: flex; flex: 1; flex-direction: column; min-height: 0; margin: 0; }
.workspace-shell .learning-transcript { position: relative; flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: var(--pl-border-strong) transparent; padding: 20px max(32px, calc((100% - 760px) / 2)) 40px; scroll-padding: 24px; }
.app-body.workspace-body .learning-thread .practice-workspace { margin-bottom: 32px; border: 0; border-radius: 0; background: none; box-shadow: none; overflow: visible; }
.app-body.workspace-body .learning-thread .practice-disclosure { border-bottom: 1px solid var(--pl-border); }
.app-body.workspace-body .learning-thread .practice-disclosure summary { padding: 6px 0; min-height: 44px; gap: 12px; background: none; }
.app-body.workspace-body .learning-thread .practice-panel-heading { color: var(--pl-accent-strong); font-size: 13px; font-weight: 600; }
.app-body.workspace-body .learning-thread .practice-disclosure__icon { width: 24px; height: 24px; border: 0; color: var(--pl-accent-strong); font-size: 16px; }
.app-body.workspace-body .learning-thread .practice-problem__body, .app-body.workspace-body .learning-thread .practice-solution__body { padding: 12px 0 24px; border: 0; }
.app-body.workspace-body .learning-thread .practice-math { font-size: 15px; line-height: 1.75; }
.app-body.workspace-body .learning-thread .practice-source { padding: 12px 0; font-size: 12px; }
.app-body.workspace-body .learning-thread .practice-source > span { font-weight: 500; letter-spacing: 0; }
.app-body.workspace-body .learning-thread .chat-box { min-height: 0; max-height: none; overflow: visible; padding: 0; gap: 32px; }
.app-body.workspace-body .learning-thread .chat-message { position: relative; max-width: 100%; padding: 0; border: 0; border-radius: 0; background: none; color: var(--pl-ink); scroll-margin: 24px; }
.app-body.workspace-body .learning-thread .chat-message--you { align-self: flex-end; max-width: 85%; padding: 12px 16px; border-radius: 16px; background: var(--pl-surface-soft); }
/* Speaker labels remain available to screen readers without repeating in the UI. */
.workspace-shell .learning-thread .chat-message > strong { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.app-body.workspace-body .learning-thread .chat-message p { font-size: 15px; line-height: 1.75; }
.app-body.workspace-body .learning-thread .chat-input-container { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 0 8px; flex: 0 0 auto; width: calc(100% - 64px); max-width: 760px; margin: 0 auto 20px; padding: 8px 8px 8px 16px; border: 1px solid var(--pl-border); border-radius: 18px; background: var(--pl-field); }
.app-body.workspace-body .learning-thread .chat-input-container:focus-within { border-color: var(--pl-border-strong); }
.app-body.workspace-body .learning-thread .chat-input-container textarea { display: block; width: 100%; min-height: 36px; max-height: min(10rem, 25dvh); margin: 0; padding: 6px 0; border: 0 !important; outline: 0 !important; box-shadow: none; background: transparent !important; font-size: 15px; line-height: 24px; resize: none; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--pl-border-strong) transparent; }
.app-body.workspace-body .learning-thread .chat-input-container textarea::placeholder { color: var(--pl-faint); opacity: 1; }
.app-body.workspace-body .learning-thread .chat-input-container__footer { flex-direction: row; align-items: center; justify-content: flex-end; gap: 8px; padding: 0; }
.workspace-shell .learning-thread .chat-send-button, .workspace-shell .learning-thread .voice-button { width: 36px; min-width: 36px; height: 36px; min-height: 36px; border: 0; box-shadow: none; }
.workspace-shell .learning-thread .chat-send-button { color: var(--pl-on-accent); background: var(--pl-accent); font-weight: 500; }
.workspace-shell .learning-thread .chat-send-button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.workspace-shell .learning-thread textarea:placeholder-shown + .chat-input-container__footer .chat-send-button { color: var(--pl-muted); background: var(--pl-surface-soft); }
.workspace-shell .learning-thread .voice-button { position: relative; background: none; }
.workspace-shell .learning-thread .voice-button::before { position: absolute; inset: -4px; content: ""; }
.workspace-shell .learning-thread .voice-status, .workspace-shell .learning-thread .voice-disclosure { grid-column: 1 / -1; }
.workspace-shell .learning-thread #tutor-request-status:empty { display: none; }
.workspace-shell .learning-thread #tutor-request-status { width: calc(100% - 64px); max-width: 760px; margin: -8px auto 12px; font-size: 12px; }
.workspace-shell .learning-thread #tutor-recover { align-self: center; margin-bottom: 12px; }
.workspace-shell .learning-thread .practice-enrollment-link { margin: 0 0 12px; font-size: 12px; }
.workspace-shell .learning-thread--static { overflow-y: auto; }
.app-body.workspace-body .learning-thread--static .practice-tutor { flex: 0 0 auto; }
.app-body.workspace-body .learning-thread--static > .practice-workspace { margin: 24px 32px; }

/* Shared page ribbon for the three primary workspace destinations. */
.app-body.workspace-body .workspace-page { width: 100%; max-width: none; margin: 0; padding: 0; }
.app-body.workspace-body .workspace-ribbon {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  margin: 0;
  padding: 12px 28px;
  border: 0;
  border-bottom: 1px solid var(--pl-border);
  border-radius: 0;
  background: var(--pl-page);
}
.app-body.workspace-body .workspace-ribbon h1 { margin: 0; color: var(--workspace-heading); font-size: 15px; font-weight: 500; letter-spacing: -.015em; line-height: 1.4; }
.app-body.workspace-body .workspace-ribbon > a { margin-left: auto; display: inline-flex; align-items: center; min-height: 36px; font-size: 12px; }
.app-body.workspace-body .learning-thread .workspace-ribbon { display: grid; }
.app-body.workspace-body .workspace-page-content { width: min(100%, var(--pl-content-wide)); margin: 0 auto; padding: 28px; }

@media (max-width: 760px) {
  .app-body.workspace-body .cover-container { flex-direction: column !important; }
  .workspace-shell .workspace-navigation { flex: 0 0 auto; max-height: 65dvh; }
  .workspace-shell .workspace-brandbar { min-height: 56px; padding: 6px 16px; }
  .workspace-shell .workspace-brand { font-size: 14px; }
  .workspace-shell .workspace-brand img { width: 22px; height: 26px; }
  :root[data-navigation-ready] .workspace-shell .workspace-menu-toggle { display: grid; width: 44px; height: 44px; place-items: center; padding: 0; border: 0; border-radius: 8px; color: var(--pl-muted); background: none; }
  .workspace-shell .workspace-nav { overflow-y: auto; padding: 0 12px 12px; }
  :root[data-navigation-ready] .workspace-shell .workspace-nav:not(.show) { display: none; }
  .workspace-shell .workspace-recents { margin-top: 12px; flex: 0 0 auto; }
  .workspace-shell .workspace-account { flex-shrink: 0; }
  .workspace-shell .account-links { position: static; width: 100%; max-width: none; margin-top: 8px; }
  .workspace-shell .workspace-account { align-items: start; }
  .workspace-shell .site-flashes { left: 50%; top: 56px; max-width: calc(100% - 32px); }
  .app-body.workspace-body .app-main { height: auto; flex: 1 1 0; }
  .app-body.workspace-body .workspace-content { padding: 24px 20px; }
  .app-body.workspace-body .workspace-ribbon { min-height: 64px; padding: 9px 20px; gap: 8px; }
  .app-body.workspace-body .workspace-page-content { padding: 20px; }
  .workspace-shell .learning-transcript { padding: 12px 20px 28px; }
  .app-body.workspace-body .learning-thread .chat-input-container { width: calc(100% - 32px); margin-bottom: max(16px, env(safe-area-inset-bottom)); padding: 8px 8px 8px 12px; }
  /* Keep mobile inputs at 16px to prevent browser zoom while composing. */
  .app-body.workspace-body .learning-thread .chat-input-container textarea { font-size: 16px; }
  .app-body.workspace-body .learning-thread .chat-message--you { max-width: 92%; }
  .workspace-shell .learning-thread #tutor-request-status { width: calc(100% - 40px); }
}