:is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
}

:is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) .module-links {
  justify-content: flex-end;
}

:is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) .module-context {
  min-width: 0;
}

/* Reserve the same slot before sign-in state is known. */
:where(html:has(script[src*="course-auth.js"])) .module-nav:not(.has-course-auth)::after {
  content: "";
  min-width: 88px;
  min-height: 44px;
}

.course-auth-slot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 88px;
  min-height: 44px;
}

.course-auth-button,
.course-auth-secondary,
.course-auth-link,
.course-account-menu summary {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 13px;
  border: 1px solid #08090a;
  border-radius: 0;
  font: inherit;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.course-auth-button {
  background: #08090a;
  color: #fff;
}

.course-auth-secondary,
.course-auth-link {
  background: #fff;
  color: #08090a;
}

.course-auth-link {
  min-height: auto;
  padding: 2px 0;
  border: 0;
  color: #246fd8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.course-auth-button:focus-visible,
.course-auth-secondary:focus-visible,
.course-auth-link:focus-visible,
.course-account-menu summary:focus-visible {
  outline: 3px solid #8bb8ff;
  outline-offset: 3px;
}

.course-auth-button:disabled,
.course-auth-secondary:disabled,
.course-auth-link:disabled {
  cursor: wait;
  opacity: .6;
}

.course-guest-label {
  padding: 6px 9px;
  border: 1px solid #cfd3d8;
  color: #555b65;
  font-size: 13px;
  font-weight: 800;
}

.course-account-menu {
  position: relative;
}

.course-account-menu summary {
  background: #fff;
  color: #08090a;
  list-style: none;
}

.course-account-menu summary::-webkit-details-marker {
  display: none;
}

.course-account-menu summary::after {
  margin-left: 7px;
  content: "▾";
  font-size: 11px;
}

.course-account-menu[open] summary::after {
  content: "▴";
}

.course-account-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 20;
  width: min(300px, calc(100vw - 32px));
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid #08090a;
  background: #fff;
  box-shadow: 0 12px 30px rgb(8 9 10 / 16%);
}

.course-account-panel span {
  color: #555b65;
  font-size: 14px;
}

.course-save-reminder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
  padding: clamp(18px, 3vw, 24px);
  border-left: 5px solid #246fd8;
  background: #eaf2ff;
}

.course-save-reminder.is-signed-in {
  border-left-color: #176b45;
  background: #eaf7f0;
}

.course-save-reminder p {
  max-width: 720px;
  margin: 6px 0 0;
  color: #3d444e;
}

.course-save-reminder > .course-auth-button {
  flex: 0 0 auto;
}

.course-tutor-save-note {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid #cfd3d8;
  color: #555b65;
  font-size: 13px;
}

.course-tutor-save-note .course-auth-link {
  flex: 0 0 auto;
  font-size: 13px;
}

.course-auth-error {
  max-width: 1040px;
  margin: 0 auto;
  padding: 10px 16px;
  color: #a63232;
  font-size: 14px;
  font-weight: 700;
}

.course-auth-callback {
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 24px;
  background: #f1f2f4;
  color: #08090a;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.course-auth-callback main {
  width: min(560px, 100%);
  padding: clamp(24px, 6vw, 44px);
  border-top: 5px solid #246fd8;
  background: #fff;
  box-shadow: 0 18px 50px rgb(8 9 10 / 10%);
}

.course-auth-callback .eyebrow {
  margin: 0 0 10px;
  color: #246fd8;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.course-auth-callback h1 {
  margin: 0;
  font-size: clamp(34px, 8vw, 54px);
  line-height: 1.05;
  letter-spacing: -.03em;
}

.course-auth-callback [data-auth-callback-status] {
  min-height: 48px;
  margin: 20px 0 0;
  color: #555b65;
  font-size: 18px;
}

.course-auth-callback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

@media (max-width: 760px) {
  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px 16px;
  }

  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) > a:first-child {
    grid-column: 1;
    grid-row: 1;
  }

  :where(html:has(script[src*="course-auth.js"])) .module-nav:not(.has-course-auth)::after,
  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) .course-auth-slot {
    grid-column: 2;
    grid-row: 1;
  }

  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) > .module-links,
  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) .module-context {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
  }

  :is(.has-course-auth, :where(html:has(script[src*="course-auth.js"])) .module-nav) .module-links {
    justify-content: space-between;
    padding-top: 10px;
    border-top: 1px solid #cfd3d8;
  }

  .course-save-reminder,
  .course-tutor-save-note {
    align-items: stretch;
    flex-direction: column;
  }

  .course-save-reminder > .course-auth-button {
    width: 100%;
  }

  .course-tutor-save-note .course-auth-link {
    align-self: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-auth-button,
  .course-auth-secondary,
  .course-auth-link {
    scroll-behavior: auto;
  }
}
/* Auth forms remain comfortable on a phone, with native password-manager support. */
.course-auth-callback [hidden] { display: none !important; }
.course-auth-callback form { display: grid; gap: .75rem; margin: 1.5rem 0; }
.course-auth-callback label { font-weight: 600; }
.course-auth-callback input, .course-auth-callback select {
  box-sizing: border-box; width: 100%; min-height: 48px; padding: .75rem;
  font: inherit; font-size: 16px; border: 1px solid #777; border-radius: 4px;
}
.course-auth-callback button { min-height: 48px; }
.course-auth-callback :focus-visible { outline: 3px solid #2370d1; outline-offset: 3px; }