:root {
  --bright-focus: #fff0b8;
  --bright-rail-ink: #2d191b;
  --bright-backdrop:
    radial-gradient(ellipse at 9% 0%, #552b33, transparent 68%) top / 100% 860px no-repeat,
    radial-gradient(ellipse at 100% 24%, #483042, transparent 72%) top / 100% 1040px no-repeat,
    #2c1c23;
  --bright-rail-face: linear-gradient(162deg, #321d24, #241319);
  --bright-rail-shadow: inset 0 1px rgb(255 214 197 / .14), 6px 12px 26px rgb(22 11 17 / .58), 2px 4px 8px rgb(23 12 17 / .65);
  --bright-rail-current: linear-gradient(#ffcab0, #ffb99e);
  --bright-form-well: #25191b;
  --bright-form-field: #1d1315;
  --bright-form-edge: #b98e86;
  --bright-error: #ff969e;
}
#app.bright-shell, #practice-app.bright-shell {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 24px 32px 0 16px;
  background: var(--bright-backdrop);
}
.bright-content {
  display: flex;
  flex-direction: column;
  min-inline-size: 0;
  min-block-size: calc(100svh - 24px);
}
.bright-content > :is(.page, .practice-page, .site-footer), .bright-content .site-footer-inner {
  width: 100%;
  max-width: none;
  margin-inline: 0;
  padding-inline: 0;
}
.bright-content > :is(.page, .practice-page) { padding-block-start: 10px; }
.bright-content > .page-student { max-width: 960px; }
.bright-content > .page-narrow { max-width: 720px; }
.bright-content :focus-visible {
  outline: 3px solid var(--bright-focus);
  outline-offset: 2px;
}
.bright-content :is(.button:not(.button-secondary,.button-quiet,.button-danger),.practice-button.primary):focus-visible {
  outline-color: var(--bright-rail-ink);
  outline-offset: -4px;
}
.bright-navigation { position: sticky; top: 24px; min-inline-size: 0; z-index: 4; }
.bright-rail {
  min-block-size: 452px;
  padding: 14px 7px 12px;
  border-radius: 23px;
  background: var(--bright-rail-face);
  box-shadow: var(--bright-rail-shadow);
}
.bright-navigation a { text-decoration: none; }
.bright-rail .site-brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  block-size: 67px;
  gap: 6px;
  font-size: 12px;
  border-radius: 14px;
}
.bright-rail .site-brand img { inline-size: 36px; block-size: 36px; }
.bright-icon { display: block; flex: none; inline-size: 20px; block-size: 20px; }
.bright-rail-links { display: grid; gap: 8px; margin-block-start: 17px; }
.bright-rail-link {
  display: grid;
  place-items: center;
  position: relative;
  min-block-size: 54px;
  border-radius: 12px;
  color: var(--md-on-surface);
}
.bright-rail-link:hover { background: #42282d; color: var(--md-on-surface); }
.bright-rail-link[aria-current] {
  background: var(--bright-rail-current);
  color: var(--bright-rail-ink);
  box-shadow: 0 3px #6d3936;
}
.bright-rail-link[aria-current]::after {
  content: '';
  position: absolute;
  inset-inline-end: 17px;
  inline-size: 6px;
  block-size: 6px;
  border-radius: 1px;
  transform: rotate(45deg);
  background: currentColor;
}
.bright-rail-account {
  margin-block-start: 13px;
  min-block-size: 48px;
  background: #42282d;
  color: #ffc0a7;
}
.bright-rail-account::before {
  content: '';
  position: absolute;
  inset: -10px 10px auto;
  border-block-start: 1px solid #68464a;
}
.bright-navigation :focus-visible { outline: 3px solid var(--bright-focus); outline-offset: -3px; }
.bright-navigation [aria-current]:focus-visible { outline-color: var(--bright-rail-ink); }
.bright-mobile-head { display: none; }
.bright-menu-drawer {
  position: fixed;
  inset: 10px auto auto 10px;
  margin: 0;
  inline-size: 222px;
  max-block-size: calc(100dvh - 20px);
  max-inline-size: calc(100vw - 20px);
  padding: 10px 12px 22px;
  overflow: auto;
  overscroll-behavior: contain;
  border: 0;
  border-radius: 22px;
  background: var(--bright-rail-face);
  box-shadow: var(--bright-rail-shadow);
  color: var(--md-on-surface);
}
.bright-menu-drawer::backdrop { background: rgb(22 12 17 / .77); }
.bright-navigation:has(.bright-menu-drawer[open]) .bright-mobile-head { visibility: hidden; }
html:has(.bright-menu-drawer[open]) { overflow: hidden; }
.bright-menu-drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.bright-menu-drawer-head .site-brand { order: -1; }
.bright-menu-drawer .site-brand, .bright-mobile-head .site-brand { font-size: 18px; }
:is(.bright-menu-drawer, .bright-mobile-head) .site-brand img { inline-size: 34px; block-size: 34px; }
.bright-menu-close, .bright-menu-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-inline-size: 44px;
  min-block-size: 44px;
  padding: 0;
  border: 1px solid #94655f;
  border-radius: 12px;
  color: var(--md-on-surface);
  background: #42282d;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}
.bright-menu-trigger { inline-size: 99px; min-block-size: 48px; background: var(--bright-rail-face); }
.bright-menu-trigger .bright-icon { color: #ffc0a7; }
.bright-menu-drawer .bright-rail-links { margin-block-start: 23px; }
.bright-menu-drawer .bright-rail-link { min-block-size: 48px; }
.bright-skip {
  position: fixed;
  z-index: 20;
  inset: 8px auto auto 8px;
  min-block-size: 44px;
  padding: 10px 16px;
  border-radius: 9px;
  transform: translateY(-160%);
  color: var(--md-on-primary);
  background: var(--md-primary);
}
.bright-skip:focus { transform: none; }
.bright-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: clamp(29px, 3.2vw, 40px);
  line-height: 1.13;
  letter-spacing: -.024em;
}
.bright-heading .bright-icon { color: var(--md-primary); inline-size: 23px; block-size: 23px; }
.bright-heading-error .bright-icon { color: var(--bright-error); }
.bright-form-bay {
  padding: 18px;
  background: var(--bright-form-well);
  border: 1px solid #633d42;
  border-radius: 18px;
  box-shadow: inset 0 0 0 6px var(--md-surface-lowest), 0 3px #211417;
}
.bright-form-bay :is(.input, input[type="password"]) {
  min-block-size: 48px;
  background: var(--bright-form-field);
  border: 1px solid var(--bright-form-edge);
  border-radius: 9px;
}
.bright-form-bay [aria-invalid="true"] { border-color: var(--bright-error); }
.bright-form-bay :is(.button,.practice-button) { min-block-size: 48px; border-radius: 10px; font-weight: 700; }
@media (max-width: 760px) {
  #app.bright-shell, #practice-app.bright-shell {
    display: block;
    padding: 13px 16px 0;
  }
  .bright-content { min-block-size: calc(100svh - 61px); }
  .bright-content > :is(.page, .practice-page) { padding-block-start: 15px; }
  .bright-navigation { position: static; }
  .bright-rail { display: none; }
  .bright-mobile-head { display: flex; align-items: center; justify-content: space-between; }
}
@media (max-width: 355px) {
  #app.bright-shell, #practice-app.bright-shell { padding-inline: 14px; }
  .bright-form-bay { padding-inline: 16px; }
}
@media (min-width: 761px) and (max-height: 500px) {
  .bright-rail { min-block-size: 0; max-block-size: calc(100dvh - 48px); overflow: auto; }
}