body.lesson-page {
  --lesson-vocabulary-edge-offset: clamp(16px, calc((100vw - 1060px) / 2 - 20px), 96px);
}

.lesson-vocabulary-drawer {
  position: fixed;
  inset: 0;
  z-index: 1450;
  pointer-events: none;
}

.lesson-vocabulary-drawer__backdrop {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: var(--workspace-dialog-backdrop, var(--cl-overlay));
  opacity: 0;
  pointer-events: none;
  cursor: pointer;
  transition: opacity .18s ease;
}

.lesson-vocabulary-drawer__panel {
  position: absolute;
  top: max(126px, calc(var(--lesson-topbar-offset, 0px) + 142px));
  right: var(--lesson-vocabulary-edge-offset, 24px);
  left: auto;
  z-index: 1;
  width: min(380px, calc(100vw - 32px));
  max-height: calc(100vh - var(--lesson-topbar-offset, 0px) - 96px);
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 96%, #111827 4%);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .34);
  transform: translateY(-8px);
  opacity: 0;
  transition: opacity .18s ease, transform .18s ease;
}

.lesson-vocabulary-drawer--open,
.lesson-vocabulary-drawer--closing {
  pointer-events: auto;
}

.lesson-vocabulary-drawer--open .lesson-vocabulary-drawer__backdrop,
.lesson-vocabulary-drawer--closing .lesson-vocabulary-drawer__backdrop {
  pointer-events: auto;
}

.lesson-vocabulary-drawer--open .lesson-vocabulary-drawer__backdrop {
  opacity: 1;
}

.lesson-vocabulary-drawer--open .lesson-vocabulary-drawer__panel {
  pointer-events: auto;
  transform: translateY(0);
  opacity: 1;
}

body.lesson-vocabulary-drawer-open {
  overflow: hidden;
  overscroll-behavior: none;
}

.lesson-vocabulary-drawer__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.lesson-vocabulary-drawer__eyebrow {
  margin: 0 0 4px;
  color: var(--text-3);
  font-size: var(--font-size-100);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.lesson-vocabulary-drawer__header h2 {
  margin: 0;
  color: var(--text-1);
  font-size: var(--font-size-500);
  line-height: 1.2;
}

.lesson-vocabulary-drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--panel-soft-3);
  color: var(--text-2);
  cursor: pointer;
}

.lesson-vocabulary-drawer__close:hover,
.lesson-vocabulary-drawer__close:focus-visible {
  border-color: color-mix(in srgb, var(--article-link) 45%, var(--line-soft));
  color: var(--article-link);
}

.lesson-vocabulary-drawer__close:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--article-link) 28%, transparent);
  outline-offset: 2px;
}

.lesson-vocabulary-form {
  display: grid;
  gap: 12px;
}

.lesson-vocabulary-form label {
  display: grid;
  gap: 6px;
  margin: 0;
}

.lesson-vocabulary-form label span {
  color: var(--text-2);
  font-size: var(--font-size-100);
  font-weight: 800;
}

.lesson-vocabulary-form input,
.lesson-vocabulary-form select,
.lesson-vocabulary-list__head input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--panel-soft-3);
  color: var(--text-1);
  padding: 0 12px;
  font:inherit;
}

.lesson-vocabulary-form__submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, #f6bd48, #4eb7ff);
  color: #111827;
  font-weight: 900;
  cursor: pointer;
}

.lesson-vocabulary-form__message {
  min-height: 20px;
  margin: 0;
  color: var(--text-3);
  font-size: var(--font-size-100);
}

.lesson-vocabulary-form__message[data-state="success"] { color: #73d690; }
.lesson-vocabulary-form__message[data-state="error"] { color: #ff8a8a; }

.lesson-vocabulary-list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.lesson-vocabulary-list__head {
  display: grid;
  grid-template-columns: 1fr 128px;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.lesson-vocabulary-list__head h3 {
  margin: 0;
  color: var(--text-1);
  font-size: var(--font-size-200);
}

.lesson-vocabulary-list__items {
  display: grid;
  gap: 8px;
}

.lesson-vocabulary-word {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--panel-soft-3);
  color: var(--text-1);
  text-align: left;
  cursor: pointer;
}

.lesson-vocabulary-word strong,
.lesson-vocabulary-word small,
.lesson-vocabulary-word em {
  display: block;
}

.lesson-vocabulary-word small {
  margin-top: 2px;
  color: var(--text-3);
  font-size: var(--font-size-100);
}

.lesson-vocabulary-word em {
  color: var(--text-2);
  font-style: normal;
  font-size: var(--font-size-100);
}

.lesson-vocabulary-list__empty {
  margin: 0;
  color: var(--text-3);
  font-size: var(--font-size-100);
}

.lesson-vocabulary-auth {
  display: grid;
  justify-items: start;
  gap: 12px;
  color: var(--text-2);
}

.lesson-vocabulary-auth i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--panel-soft-3);
  color: #f6bd48;
  font-size: var(--font-size-500);
}

.lesson-vocabulary-auth p {
  margin: 0;
}

.lesson-vocabulary-auth a {
  color: #4eb7ff;
  font-weight: 800;
}

.lesson-vocabulary-context-menu {
  position: fixed;
  z-index: 11000;
  display: grid;
  gap: 4px;
  min-width: 190px;
  padding: 6px;
  border: 1px solid rgba(17, 24, 39, .12);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(15, 23, 42, .2);
}

.lesson-vocabulary-context-menu[hidden] {
  display: none;
}

.lesson-vocabulary-context-menu button {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-height: 36px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #1f2937;
  font:inherit;
  font-size: var(--font-size-100);
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.lesson-vocabulary-context-menu button:hover {
  background: #eef5ff;
  color: #2563eb;
}

.lesson-reference-card {
  position: fixed;
  right: 28px;
  top: calc(var(--lesson-topbar-offset, 0px) + 86px);
  z-index: 10980;
  width: min(560px, calc(100vw - 56px));
  max-height: calc(100vh - var(--lesson-topbar-offset, 0px) - 112px);
  overflow: auto;
  padding: 18px;
  border: 1px solid rgba(37, 99, 235, .18);
  border-radius: 10px;
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 22px 58px rgba(15, 23, 42, .24);
}

.lesson-reference-card[hidden] {
  display: none;
}

.lesson-reference-card--phonetics {
  width: min(680px, calc(100vw - 56px));
  padding: 14px;
}

.lesson-reference-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.lesson-reference-card__eyebrow {
  display: block;
  margin-bottom: 3px;
  color: #64748b;
  font-size: var(--font-size-100);
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.lesson-reference-card__head h3 {
  margin: 0;
  color: #172033;
  font-size: var(--font-size-500);
  line-height: 1.2;
  font-weight: 900;
}

.lesson-reference-card__close {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(148, 163, 184, .5);
  border-radius: 8px;
  background: #fff;
  color: #334155;
  cursor: pointer;
}

.lesson-reference-card__close:hover {
  border-color: rgba(37, 99, 235, .35);
  color: #2563eb;
}

.lesson-reference-alphabet {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(82px, 1fr));
  gap: 8px;
}

.lesson-reference-letter {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: baseline;
  gap: 5px;
  min-height: 48px;
  padding: 8px 10px;
  border: 1px solid rgba(148, 163, 184, .34);
  border-radius: 8px;
  background: linear-gradient(180deg, #fff 0%, #f8fbff 100%);
  color: #1f2937;
  text-align: left;
  cursor: pointer;
}

.lesson-reference-letter:hover {
  border-color: rgba(37, 99, 235, .38);
  background: #eef5ff;
}

.lesson-reference-letter__main {
  color: #2f6fd6;
  font-size: var(--font-size-600);
  font-weight: 900;
  line-height: 1;
}

.lesson-reference-letter__small {
  font-size: var(--font-size-300);
  font-weight: 900;
}

.lesson-reference-letter__name {
  align-self: center;
  color: #64748b;
  font-size: var(--font-size-100);
  font-weight: 800;
}

.lesson-reference-letter i {
  align-self: center;
  color: #64748b;
  font-size: var(--font-size-100);
}

.lesson-reference-phonetics__group + .lesson-reference-phonetics__group {
  margin-top: 10px;
}

.lesson-reference-phonetics__group h4 {
  margin: 0 0 6px;
  color: #1f2937;
  font-size: var(--font-size-100);
  font-weight: 900;
}

.lesson-reference-phonetics__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 5px;
}

.lesson-reference-sound {
  position: relative;
  display: grid;
  gap: 1px;
  min-height: 50px;
  padding: 6px 30px 6px 8px;
  border: 1px solid rgba(148, 163, 184, .3);
  border-radius: 7px;
  background: #f8fbff;
}

.lesson-reference-sound strong {
  color: #2563eb;
  font-size: var(--font-size-300);
  line-height: 1.1;
}

.lesson-reference-sound span {
  color: #1f2937;
  font-size: var(--font-size-100);
  font-weight: 800;
  line-height: 1.25;
}

.lesson-reference-sound em {
  color: #64748b;
  font-size: var(--font-size-100);
  font-style: normal;
  line-height: 1.2;
}

.lesson-reference-sound__audio {
  position: absolute;
  top: 6px;
  right: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(37, 99, 235, .18);
  border-radius: 50%;
  background: #fff;
  color: #2563eb;
  font-size: var(--font-size-100);
  cursor: pointer;
}

.lesson-reference-sound__audio:hover {
  border-color: rgba(37, 99, 235, .38);
  background: #eef5ff;
}

@media (max-width: 760px) {
  .lesson-vocabulary-drawer__panel {
    top: calc(var(--lesson-topbar-offset, 0px) + 56px);
    right: 12px;
    left: 12px;
    width: calc(100vw - 24px);
    max-height: calc(100vh - var(--lesson-topbar-offset, 0px) - 70px);
    max-height: calc(100dvh - var(--lesson-topbar-offset, 0px) - 70px);
  }

  .lesson-vocabulary-drawer__close {
    width: 44px;
    height: 44px;
  }

  .lesson-vocabulary-list__head {
    grid-template-columns: 1fr;
  }

  .lesson-vocabulary-context-menu--mobile {
    top: auto !important;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px !important;
    min-width: 0;
    width: auto;
    gap: 6px;
    padding: 10px;
    border-radius: 16px 16px 12px 12px;
    box-shadow: 0 22px 60px rgba(15, 23, 42, .28);
  }

  .lesson-vocabulary-context-menu--mobile button {
    min-height: 46px;
    padding: 0 12px;
    border-radius: 10px;
    font-size: var(--font-size-200);
  }

  .lesson-vocabulary-context-menu--mobile button i {
    width: 20px;
    text-align: center;
    font-size: var(--font-size-300);
  }

  .lesson-reference-card {
    top: auto;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    width: auto;
    max-height: min(78vh, calc(100vh - var(--lesson-topbar-offset, 0px) - 24px));
    padding: 12px;
    border-radius: 16px 16px 12px 12px;
  }

  .lesson-reference-card--phonetics {
    width: auto;
    padding: 10px;
  }

  .lesson-reference-card__head {
    position: sticky;
    top: -12px;
    z-index: 1;
    align-items: center;
    margin: -12px -12px 10px;
    padding: 10px 12px 8px;
    border-bottom: 1px solid rgba(148, 163, 184, .2);
    background: rgba(255, 255, 255, .98);
  }

  .lesson-reference-card--phonetics .lesson-reference-card__head {
    top: -10px;
    margin: -10px -10px 8px;
    padding: 9px 10px 7px;
  }

  .lesson-reference-card__eyebrow {
    margin-bottom: 1px;
    font-size: var(--font-size-100);
    letter-spacing: .06em;
  }

  .lesson-reference-card__head h3 {
    font-size: var(--font-size-400);
  }

  .lesson-reference-card__close {
    width: 32px;
    height: 32px;
    border-radius: 9px;
  }

  .lesson-reference-alphabet {
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
    gap: 6px;
  }

  .lesson-reference-letter {
    min-height: 42px;
    padding: 7px 8px;
    grid-template-columns: auto auto 1fr;
  }

  .lesson-reference-letter__main {
    font-size: var(--font-size-500);
  }

  .lesson-reference-letter__small {
    font-size: var(--font-size-100);
  }

  .lesson-reference-letter__name {
    font-size: var(--font-size-100);
  }

  .lesson-reference-letter i {
    display: none;
  }

  .lesson-reference-phonetics__group + .lesson-reference-phonetics__group {
    margin-top: 8px;
  }

  .lesson-reference-phonetics__group h4 {
    margin-bottom: 5px;
    font-size: var(--font-size-100);
  }

  .lesson-reference-phonetics__grid {
    grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
    gap: 4px;
  }

  .lesson-reference-sound {
    min-height: 46px;
    padding: 5px 28px 5px 7px;
    border-radius: 7px;
  }

  .lesson-reference-sound strong {
    font-size: var(--font-size-200);
  }

  .lesson-reference-sound span {
    font-size: var(--font-size-100);
  }

  .lesson-reference-sound em {
    font-size: var(--font-size-100);
  }

  .lesson-reference-sound__audio {
    top: 5px;
    right: 5px;
    width: 21px;
    height: 21px;
    font-size: var(--font-size-100);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-vocabulary-drawer__backdrop,
  .lesson-vocabulary-drawer__panel {
    transition: none;
  }
}