.grammar-practice-page {
  --grammar-ink: #17243a;
  --grammar-muted: #66758a;
  --grammar-paper: #f5f7f3;
  --grammar-card: #ffffff;
  --grammar-line: #dce3dd;
  --grammar-navy: #203553;
  --grammar-mint: #79d8ad;
  --grammar-mint-dark: #217056;
  --grammar-yellow: #f4cf62;
  --grammar-coral: #e86f61;
  --grammar-blue: #dcebf5;
  min-height: 100vh;
  color: var(--grammar-ink);
  background: var(--grammar-paper);
}

.grammar-main {
  width: min(100%, 1480px);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 58px) clamp(16px, 4vw, 60px) 80px;
}

.grammar-overview-page .grammar-main {
  width: min(100%, 1280px);
}

.grammar-overview-page .grammar-hero {
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: clamp(28px, 4vw, 56px);
  min-height: 0;
  padding: clamp(28px, 4vw, 48px);
  border-radius: 25px;
}

.grammar-overview-page .grammar-back-link {
  margin-bottom: 22px;
}

.grammar-overview-page .grammar-hero h1 {
  max-width: 720px;
  font-size: clamp(2.75rem, 5vw, 4.9rem);
  line-height: 0.98;
}

.grammar-overview-page .grammar-hero-copy > p:not(.eyebrow) {
  max-width: 650px;
  margin-top: 18px;
  font-size: clamp(0.95rem, 1.4vw, 1.06rem);
  line-height: 1.65;
}

.grammar-overview-page .grammar-hero-actions {
  margin-top: 24px;
}

.grammar-overview-page .grammar-hero-card {
  width: min(100%, 370px);
  padding: 21px;
  border-radius: 21px;
  box-shadow: 10px 11px 0 #dcefe6;
}

.grammar-overview-page .grammar-roadmap-scale {
  margin: 24px 0 20px;
}

.grammar-overview-page .grammar-roadmap-scale a {
  min-height: 52px;
}

.grammar-overview-page .grammar-mini-check {
  margin-top: 18px;
  padding-top: 16px;
}

.grammar-overview-page .grammar-level-section {
  padding-top: 54px;
}

.grammar-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: clamp(32px, 6vw, 90px);
  align-items: center;
  overflow: hidden;
  min-height: 490px;
  padding: clamp(32px, 6vw, 76px);
  border: 1px solid #cfd8d0;
  border-radius: 32px;
  background: #fffdf7;
  box-shadow: 0 28px 70px rgba(28, 47, 71, 0.1);
}

.grammar-hero::before,
.grammar-hero::after {
  position: absolute;
  z-index: -1;
  content: "";
  pointer-events: none;
}

.grammar-hero::before {
  top: -54px;
  right: 29%;
  width: 158px;
  height: 158px;
  border: 24px solid rgba(121, 216, 173, 0.24);
  border-radius: 50%;
}

.grammar-hero::after {
  right: -42px;
  bottom: -66px;
  width: 180px;
  height: 180px;
  border-radius: 38px;
  background: rgba(244, 207, 98, 0.27);
  transform: rotate(17deg);
}

.grammar-hero-copy {
  max-width: 720px;
}

.grammar-back-link {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  margin-bottom: 42px;
  color: var(--grammar-muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.grammar-back-link span {
  font-size: 1.2rem;
}

.grammar-hero .eyebrow,
.grammar-section-heading .eyebrow,
.grammar-course-summary .eyebrow,
.grammar-lesson-panel .eyebrow {
  margin: 0 0 8px;
  color: var(--grammar-mint-dark);
  font-size: 0.74rem;
  font-weight: 950;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.grammar-hero h1 {
  max-width: 780px;
  margin: 0;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 6.1vw, 6.35rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.grammar-hero h1 em {
  color: var(--grammar-mint-dark);
  font-weight: 500;
}

.grammar-hero-copy > p:not(.eyebrow) {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--grammar-muted);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
  line-height: 1.75;
}

.grammar-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  margin-top: 32px;
}

.grammar-primary-button,
.grammar-check-button,
.grammar-next-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border: 0;
  border-radius: 13px;
  padding: 0 22px;
  color: #ffffff;
  background: var(--grammar-navy);
  box-shadow: 0 10px 22px rgba(32, 53, 83, 0.18);
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.grammar-primary-button:hover,
.grammar-primary-button:focus-visible,
.grammar-check-button:hover,
.grammar-check-button:focus-visible,
.grammar-next-button:hover,
.grammar-next-button:focus-visible {
  background: #2c476d;
  box-shadow: 0 13px 26px rgba(32, 53, 83, 0.24);
  transform: translateY(-2px);
}

.grammar-save-note {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--grammar-muted);
  font-size: 0.9rem;
  font-weight: 750;
}

.grammar-save-note span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--grammar-mint-dark);
  font-size: 0.76rem;
}

.grammar-hero-card {
  position: relative;
  width: min(100%, 430px);
  justify-self: end;
  padding: 28px;
  border: 1px solid #cad8d0;
  border-radius: 25px;
  background: #ffffff;
  box-shadow: 13px 14px 0 #dcefe6;
  transform: rotate(1.2deg);
}

.grammar-hero-card::before {
  position: absolute;
  top: -11px;
  left: 50%;
  width: 92px;
  height: 22px;
  background: rgba(244, 207, 98, 0.74);
  content: "";
  transform: translateX(-50%) rotate(-2deg);
}

.grammar-hero-card-top {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--grammar-muted);
  font-size: 0.82rem;
  font-weight: 850;
}

.grammar-level-stamp {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 13px;
  color: #123c2d;
  background: var(--grammar-mint);
  font-size: 0.94rem;
  font-weight: 950;
}

.grammar-sentence {
  margin: 38px 0 18px;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
}

.grammar-sentence strong {
  position: relative;
  color: var(--grammar-coral);
  font-weight: inherit;
}

.grammar-sentence strong::after {
  position: absolute;
  right: 0;
  bottom: -5px;
  left: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--grammar-yellow);
  content: "";
}

.grammar-sentence-map {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 6px;
  align-items: center;
}

.grammar-sentence-map span {
  padding: 10px 7px;
  border-radius: 9px;
  color: var(--grammar-muted);
  background: #f0f4f1;
  font-size: 0.7rem;
  font-weight: 850;
  text-align: center;
}

.grammar-sentence-map i {
  color: #9aa7a0;
  font-style: normal;
  font-weight: 900;
}

.grammar-mini-check {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed #cdd7d0;
}

.grammar-mini-check > span {
  display: grid;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--grammar-mint-dark);
  font-weight: 950;
}

.grammar-mini-check strong,
.grammar-mini-check small {
  display: block;
}

.grammar-roadmap-preview {
  transform: rotate(-1deg);
}

.grammar-roadmap-scale {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
  margin: 38px 0 28px;
}

.grammar-roadmap-scale a {
  position: relative;
  display: grid;
  min-height: 66px;
  place-items: center;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 12px;
  color: #315444;
  background: #edf7f1;
  box-shadow: 0 5px 12px rgba(31, 63, 49, 0.05);
  font-size: 0.82rem;
  font-weight: 950;
  text-decoration: none;
  transform: translateY(0) scale(1);
  transform-origin: center bottom;
  transition: transform 220ms cubic-bezier(0.2, 0.9, 0.25, 1.35), border-color 180ms ease, box-shadow 220ms ease, color 180ms ease, background 180ms ease;
}

.grammar-roadmap-scale a::before {
  position: absolute;
  inset: -45%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.78) 0 18%, transparent 56%);
  content: "";
  opacity: 0;
  transform: translate(-35%, 35%) scale(0.45);
  transition: opacity 180ms ease, transform 260ms ease;
}

.grammar-roadmap-scale a::after {
  position: absolute;
  top: 6px;
  right: 8px;
  content: "\2197";
  font-size: 0.66rem;
  opacity: 0;
  transform: translate(-5px, 5px);
  transition: opacity 160ms ease, transform 200ms ease;
}

.grammar-roadmap-scale a:hover,
.grammar-roadmap-scale a:focus-visible {
  z-index: 1;
  border-color: currentColor;
  color: #0f6549;
  background: #d8f7e8;
  box-shadow: 0 16px 28px rgba(22, 90, 65, 0.2);
  outline: none;
  transform: translateY(-8px) scale(1.12) rotate(-1.5deg);
}

.grammar-roadmap-scale a:nth-child(even):hover,
.grammar-roadmap-scale a:nth-child(even):focus-visible {
  transform: translateY(-8px) scale(1.12) rotate(1.5deg);
}

.grammar-roadmap-scale a:hover::before,
.grammar-roadmap-scale a:focus-visible::before {
  opacity: 1;
  transform: translate(20%, -20%) scale(1);
}

.grammar-roadmap-scale a:hover::after,
.grammar-roadmap-scale a:focus-visible::after {
  opacity: 1;
  transform: translate(0, 0);
}

.grammar-roadmap-scale a:active {
  box-shadow: 0 7px 14px rgba(22, 90, 65, 0.16);
  transform: translateY(-3px) scale(1.04);
}

.grammar-roadmap-scale a:nth-child(2),
.grammar-roadmap-scale a:nth-child(5) {
  background: #fff5d9;
}

.grammar-roadmap-scale a:nth-child(3),
.grammar-roadmap-scale a:nth-child(6) {
  background: #eaf1f8;
}

.grammar-roadmap-scale a:nth-child(2):hover,
.grammar-roadmap-scale a:nth-child(2):focus-visible,
.grammar-roadmap-scale a:nth-child(5):hover,
.grammar-roadmap-scale a:nth-child(5):focus-visible {
  color: #7b5d08;
  background: #ffedb4;
  box-shadow: 0 16px 28px rgba(121, 88, 7, 0.18);
}

.grammar-roadmap-scale a:nth-child(3):hover,
.grammar-roadmap-scale a:nth-child(3):focus-visible,
.grammar-roadmap-scale a:nth-child(6):hover,
.grammar-roadmap-scale a:nth-child(6):focus-visible {
  color: #285b89;
  background: #d9ebfb;
  box-shadow: 0 16px 28px rgba(39, 86, 129, 0.18);
}

.grammar-mini-check small {
  margin-top: 3px;
  color: var(--grammar-muted);
}

.grammar-level-section {
  padding: 76px 8px;
}

.grammar-section-heading {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 440px);
  gap: 32px;
  align-items: end;
  margin-bottom: 26px;
}

.grammar-section-heading h2 {
  margin: 0;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 3.55rem);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.grammar-section-heading > p {
  margin: 0 0 6px;
  color: var(--grammar-muted);
  line-height: 1.7;
}

.grammar-level-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.grammar-level-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--grammar-line);
  border-radius: 20px;
  color: var(--grammar-ink);
  background: var(--grammar-card);
  cursor: pointer;
  font: inherit;
  text-decoration: none;
  text-align: left;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.grammar-level-card:not(:disabled):hover,
.grammar-level-card:not(:disabled):focus-visible {
  border-color: #77b99b;
  box-shadow: 0 14px 35px rgba(29, 60, 46, 0.1);
  transform: translateY(-3px);
}

.grammar-level-card.is-active {
  border-color: var(--grammar-mint-dark);
  background: #f0fbf6;
  box-shadow: inset 0 0 0 1px var(--grammar-mint-dark);
}

.grammar-level-card:disabled {
  cursor: not-allowed;
}

.grammar-level-code {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 15px;
  color: #536072;
  background: #edf0ed;
  font-size: 1.05rem;
  font-weight: 950;
}

.grammar-level-card.is-active .grammar-level-code {
  color: #123c2d;
  background: var(--grammar-mint);
}

.grammar-level-copy strong,
.grammar-level-copy small {
  display: block;
}

.grammar-level-copy strong {
  margin-top: 4px;
  color: var(--grammar-navy);
  font-size: 1rem;
}

.grammar-level-copy small {
  margin-top: 7px;
  color: var(--grammar-muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.grammar-level-action,
.grammar-level-soon {
  align-self: end;
  grid-column: 1 / -1;
  padding-top: 14px;
  border-top: 1px solid var(--grammar-line);
  color: var(--grammar-mint-dark);
  font-size: 0.78rem;
  font-weight: 900;
}

.grammar-level-soon {
  color: #879184;
}

.grammar-level-grid--overview {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.grammar-level-card--overview {
  grid-template-rows: auto 1fr auto;
  min-height: 430px;
  padding: 28px;
}

.grammar-level-card--overview .grammar-level-copy small {
  margin: 2px 0 8px;
  color: var(--grammar-mint-dark);
  font-size: 0.68rem;
  font-weight: 950;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.grammar-level-card--overview .grammar-level-copy strong {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.3rem, 2vw, 1.75rem);
  font-weight: 500;
  line-height: 1.2;
}

.grammar-level-card--overview .grammar-level-copy p {
  margin: 12px 0 0;
  color: var(--grammar-muted);
  font-size: 0.86rem;
  line-height: 1.65;
}

.grammar-level-topics {
  display: grid;
  grid-column: 1 / -1;
  gap: 8px;
  align-content: start;
  margin: 20px 0 6px;
  padding: 0;
  list-style: none;
}

.grammar-level-topics li {
  position: relative;
  padding-left: 22px;
  color: var(--grammar-ink);
  font-size: 0.82rem;
  line-height: 1.45;
}

.grammar-level-topics li::before {
  position: absolute;
  top: 0.25em;
  left: 0;
  display: grid;
  width: 14px;
  height: 14px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--grammar-mint-dark);
  content: "\2713";
  font-size: 0.54rem;
  font-weight: 950;
}

.grammar-level-card--overview .grammar-level-action {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.grammar-level-card--overview .grammar-level-action b {
  color: var(--grammar-muted);
  font-weight: 750;
}

.grammar-workspace--course {
  margin-top: 0;
}

.grammar-course-page .grammar-main {
  padding-top: clamp(18px, 2.5vw, 34px);
}

.grammar-course-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding: 0 4px 15px;
  border-bottom: 1px solid var(--grammar-line);
  color: var(--grammar-muted);
  font-size: 0.82rem;
}

.grammar-course-toolbar a,
.grammar-course-toolbar > span,
.grammar-course-toolbar small {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.grammar-course-toolbar a {
  color: var(--grammar-mint-dark);
  font-weight: 900;
  text-decoration: none;
}

.grammar-course-toolbar a:hover,
.grammar-course-toolbar a:focus-visible {
  text-decoration: underline;
}

.grammar-course-toolbar > span {
  color: var(--grammar-ink);
  font-weight: 800;
}

.grammar-course-toolbar > span strong {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 9px;
  color: #123c2d;
  background: var(--grammar-mint);
  font-size: 0.76rem;
}

.grammar-course-toolbar small span {
  color: var(--grammar-mint-dark);
  font-weight: 950;
}

.grammar-empty-state {
  width: min(100%, 860px);
  min-height: 570px;
  margin: 0 auto;
  padding: clamp(32px, 7vw, 82px);
  border: 1px solid var(--grammar-line);
  border-radius: 30px;
  background: var(--grammar-card);
  box-shadow: 0 28px 70px rgba(28, 47, 71, 0.1);
}

.grammar-placeholder-page .grammar-main {
  width: min(100%, 960px);
  padding-top: clamp(28px, 5vw, 64px);
}

.grammar-placeholder-page .grammar-empty-state {
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 28px 4px 70px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.grammar-placeholder-page .grammar-empty-state .grammar-back-link {
  margin-bottom: 40px;
}

.grammar-placeholder-page .grammar-empty-state > .grammar-level-stamp {
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 15px;
  font-size: 1rem;
}

.grammar-placeholder-page .grammar-empty-state h1 {
  max-width: 620px;
  font-size: clamp(2.25rem, 5vw, 3.8rem);
  line-height: 1.05;
}

.grammar-placeholder-page .grammar-empty-state > p:not(.eyebrow) {
  margin-top: 18px;
}

.grammar-empty-state .grammar-back-link {
  display: flex;
  width: fit-content;
}

.grammar-empty-state > .grammar-level-stamp {
  width: 64px;
  height: 64px;
  margin-bottom: 24px;
  border-radius: 18px;
  font-size: 1.15rem;
}

.grammar-empty-state .eyebrow {
  margin: 0 0 10px;
  color: var(--grammar-mint-dark);
  font-size: 0.74rem;
  font-weight: 950;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.grammar-empty-state h1 {
  max-width: 680px;
  margin: 0;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 6vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.grammar-empty-state > p:not(.eyebrow) {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--grammar-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.grammar-placeholder-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  margin-top: 34px;
}

.grammar-text-link {
  color: var(--grammar-mint-dark);
  font-weight: 900;
  text-decoration: none;
}

.grammar-text-link:hover,
.grammar-text-link:focus-visible {
  text-decoration: underline;
}

.grammar-workspace {
  display: grid;
  grid-template-columns: minmax(280px, 350px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.grammar-course-sidebar,
.grammar-lesson-panel {
  border: 1px solid var(--grammar-line);
  border-radius: 25px;
  background: var(--grammar-card);
  box-shadow: 0 18px 48px rgba(28, 47, 71, 0.08);
}

.grammar-course-sidebar {
  position: sticky;
  top: 94px;
  overflow: hidden;
}

.grammar-course-summary {
  padding: 24px;
  color: #ffffff;
  background: var(--grammar-navy);
}

.grammar-course-summary-top {
  display: flex;
  gap: 14px;
  align-items: center;
}

.grammar-course-summary .eyebrow {
  margin: 0 0 4px;
  color: #99d9bd;
}

.grammar-course-summary h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  font-weight: 500;
}

.grammar-progress-copy {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  color: #cdd8e8;
  font-size: 0.76rem;
  font-weight: 750;
}

.grammar-progress-copy strong {
  color: #ffffff;
}

.grammar-progress-track {
  overflow: hidden;
  height: 7px;
  margin-top: 9px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.16);
}

.grammar-progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--grammar-mint);
  transition: width 260ms ease;
}

.grammar-lesson-nav {
  max-height: min(56vh, 620px);
  overflow: auto;
  padding: 12px;
}

.grammar-lesson-nav ol {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.grammar-lesson-link {
  display: grid;
  grid-template-columns: 33px minmax(0, 1fr) 25px;
  gap: 11px;
  align-items: center;
  width: 100%;
  min-height: 58px;
  padding: 8px 10px;
  border: 0;
  border-radius: 12px;
  color: var(--grammar-ink);
  background: transparent;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.grammar-lesson-link:hover,
.grammar-lesson-link:focus-visible {
  background: #f2f6f3;
}

.grammar-lesson-link.is-active {
  background: #e8f7f0;
}

.grammar-lesson-number,
.grammar-lesson-state {
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.grammar-lesson-number {
  width: 32px;
  height: 32px;
  color: #657264;
  background: #eef1ed;
  font-size: 0.73rem;
  font-weight: 900;
}

.grammar-lesson-link.is-active .grammar-lesson-number {
  color: #123c2d;
  background: var(--grammar-mint);
}

.grammar-lesson-link.is-complete .grammar-lesson-number {
  color: #ffffff;
  background: var(--grammar-mint-dark);
}

.grammar-lesson-title strong,
.grammar-lesson-title small {
  display: block;
}

.grammar-lesson-title strong {
  overflow: hidden;
  color: var(--grammar-navy);
  font-size: 0.84rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.grammar-lesson-title small {
  margin-top: 3px;
  color: var(--grammar-muted);
  font-size: 0.69rem;
}

.grammar-lesson-state {
  width: 24px;
  height: 24px;
  border: 2px solid #d0d8d1;
  color: transparent;
  font-size: 0.7rem;
  font-weight: 950;
}

.grammar-lesson-link.is-complete .grammar-lesson-state {
  border-color: var(--grammar-mint-dark);
  color: #ffffff;
  background: var(--grammar-mint-dark);
}

.grammar-reset-button {
  width: calc(100% - 24px);
  margin: 0 12px 14px;
  min-height: 40px;
  border: 1px solid var(--grammar-line);
  border-radius: 10px;
  color: var(--grammar-muted);
  background: #ffffff;
  cursor: pointer;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 850;
}

.grammar-reset-button:hover,
.grammar-reset-button:focus-visible {
  border-color: #d58b83;
  color: #a43d33;
  background: #fff4f2;
}

.grammar-lesson-panel {
  min-height: 760px;
  padding: clamp(22px, 4vw, 48px);
}

.grammar-loading {
  display: grid;
  min-height: 500px;
  place-items: center;
  color: var(--grammar-muted);
}

.grammar-lesson-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 26px;
  align-items: start;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--grammar-line);
}

.grammar-lesson-kicker {
  display: flex;
  gap: 11px;
  align-items: center;
}

.grammar-lesson-kicker .grammar-level-stamp {
  width: 40px;
  height: 40px;
  border-radius: 11px;
}

.grammar-lesson-header h2 {
  max-width: 780px;
  margin: 12px 0 0;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.25rem, 4.7vw, 4.35rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.grammar-lesson-header > div > p:last-child {
  max-width: 740px;
  margin: 18px 0 0;
  color: var(--grammar-muted);
  line-height: 1.7;
}

.grammar-lesson-count {
  min-width: 110px;
  padding: 14px 16px;
  border: 1px solid var(--grammar-line);
  border-radius: 13px;
  color: var(--grammar-muted);
  background: #f7f9f7;
  font-size: 0.75rem;
  font-weight: 850;
  text-align: center;
}

.grammar-lesson-count strong {
  display: block;
  margin-bottom: 3px;
  color: var(--grammar-navy);
  font-size: 1.15rem;
}

.grammar-content-section {
  margin-top: 34px;
}

.grammar-content-section > h3 {
  margin: 0 0 15px;
  color: var(--grammar-navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.65rem;
  font-weight: 500;
}

.grammar-explanation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(240px, 0.65fr);
  gap: 16px;
}

.grammar-explanation,
.grammar-rule-card,
.grammar-tip-card {
  border: 1px solid var(--grammar-line);
  border-radius: 18px;
  padding: 22px;
  background: #fbfcfa;
}

.grammar-explanation p {
  margin: 0;
  color: #48586d;
  line-height: 1.8;
}

.grammar-explanation p + p {
  margin-top: 13px;
}

.grammar-rule-card {
  color: #ffffff;
  background: var(--grammar-navy);
}

.grammar-rule-card small {
  display: block;
  margin-bottom: 12px;
  color: #a9bed8;
  font-size: 0.68rem;
  font-weight: 950;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.grammar-rule-card strong {
  display: block;
  color: #ffffff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.45;
}

.grammar-rule-card p {
  margin: 14px 0 0;
  color: #cfdaea;
  font-size: 0.82rem;
  line-height: 1.55;
}

.grammar-example-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.grammar-example-card {
  position: relative;
  overflow: hidden;
  padding: 19px 20px 19px 23px;
  border: 1px solid var(--grammar-line);
  border-radius: 16px;
  background: #ffffff;
}

.grammar-example-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  background: var(--grammar-mint);
  content: "";
}

.grammar-example-card strong,
.grammar-example-card span,
.grammar-example-card small {
  display: block;
}

.grammar-example-card strong {
  color: var(--grammar-navy);
  font-size: 1rem;
}

.grammar-example-card span {
  margin-top: 6px;
  color: var(--grammar-muted);
  font-size: 0.83rem;
}

.grammar-example-card small {
  margin-top: 9px;
  color: var(--grammar-mint-dark);
  font-size: 0.72rem;
  font-weight: 800;
}

.grammar-tip-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 13px;
  align-items: start;
  background: #fff9e8;
  border-color: #ebd58a;
}

.grammar-tip-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  color: #634e12;
  background: var(--grammar-yellow);
  font-size: 1.05rem;
  font-weight: 950;
}

.grammar-tip-card strong,
.grammar-tip-card p {
  display: block;
}

.grammar-tip-card strong {
  color: #5a4816;
}

.grammar-tip-card p {
  margin: 5px 0 0;
  color: #76652f;
  font-size: 0.84rem;
  line-height: 1.6;
}

.grammar-practice-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
}

.grammar-practice-header p {
  margin: 0;
  color: var(--grammar-muted);
  font-size: 0.83rem;
}

.grammar-question-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.grammar-question {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--grammar-line);
  border-radius: 17px;
  background: #ffffff;
  transition: border-color 160ms ease, background 160ms ease;
}

.grammar-question.is-correct {
  border-color: #7cc7a5;
  background: #f2fbf7;
}

.grammar-question.is-wrong {
  border-color: #e3a49d;
  background: #fff6f4;
}

.grammar-question-status {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 2px solid #d6ddd6;
  border-radius: 50%;
  color: #8b978e;
  font-size: 0.74rem;
  font-weight: 950;
}

.grammar-question.is-correct .grammar-question-status {
  border-color: var(--grammar-mint-dark);
  color: #ffffff;
  background: var(--grammar-mint-dark);
}

.grammar-question.is-wrong .grammar-question-status {
  border-color: var(--grammar-coral);
  color: #ffffff;
  background: var(--grammar-coral);
}

.grammar-question fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.grammar-question legend {
  width: 100%;
  margin: 2px 0 14px;
  color: var(--grammar-navy);
  font-size: 0.96rem;
  font-weight: 850;
  line-height: 1.5;
}

.grammar-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.grammar-option {
  position: relative;
  display: flex;
  gap: 9px;
  align-items: center;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid #dce3dd;
  border-radius: 11px;
  color: #455469;
  background: #fafbf9;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 750;
}

.grammar-option:hover {
  border-color: #8ebda7;
}

.grammar-option:has(input:checked) {
  border-color: var(--grammar-mint-dark);
  color: #1d5843;
  background: #eaf8f1;
  box-shadow: inset 0 0 0 1px var(--grammar-mint-dark);
}

.grammar-option input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--grammar-mint-dark);
}

.grammar-question-feedback {
  display: none;
  margin: 12px 0 0;
  color: var(--grammar-muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.grammar-question.is-correct .grammar-question-feedback,
.grammar-question.is-wrong .grammar-question-feedback {
  display: block;
}

.grammar-question.is-correct .grammar-question-feedback {
  color: #22684f;
}

.grammar-question.is-wrong .grammar-question-feedback {
  color: #a44339;
}

.grammar-explain-wrap {
  grid-column: 2;
}

.grammar-explain-button {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-top: 14px;
  padding: 0;
  border: 0;
  color: var(--grammar-mint-dark);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 900;
}

.grammar-explain-button span {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 0.72rem;
}

.grammar-explain-button:hover,
.grammar-explain-button:focus-visible {
  color: #174f3c;
  text-decoration: underline;
}

.grammar-question-explanation {
  margin-top: 12px;
  padding: 15px 17px;
  border-left: 4px solid var(--grammar-mint);
  border-radius: 0 12px 12px 0;
  color: #34485f;
  background: #edf8f3;
}

.grammar-question-explanation[hidden] {
  display: none;
}

.grammar-question-explanation strong,
.grammar-question-explanation p,
.grammar-question-explanation small {
  display: block;
}

.grammar-question-explanation strong {
  color: #17563f;
  font-size: 0.82rem;
}

.grammar-question-explanation p {
  margin: 5px 0 8px;
  font-size: 0.82rem;
  line-height: 1.6;
}

.grammar-question-explanation small {
  color: var(--grammar-muted);
  font-size: 0.74rem;
  line-height: 1.55;
}

.grammar-practice-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 20px;
}

.grammar-check-button {
  background: var(--grammar-mint-dark);
  box-shadow: 0 10px 22px rgba(33, 112, 86, 0.18);
}

.grammar-check-button:hover,
.grammar-check-button:focus-visible {
  background: #195b45;
}

.grammar-practice-message {
  color: var(--grammar-muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.grammar-complete-banner {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  margin-top: 22px;
  padding: 17px;
  border: 1px solid #79bfa0;
  border-radius: 17px;
  background: #eaf8f1;
}

.grammar-complete-mark {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--grammar-mint-dark);
  font-size: 1.1rem;
  font-weight: 950;
}

.grammar-complete-banner strong,
.grammar-complete-banner small {
  display: block;
}

.grammar-complete-banner strong {
  color: #174c39;
}

.grammar-complete-banner small {
  margin-top: 4px;
  color: #527165;
}

.grammar-next-button {
  min-height: 44px;
}

.grammar-lesson-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--grammar-line);
}

.grammar-lesson-footer button {
  min-height: 44px;
  border: 1px solid var(--grammar-line);
  border-radius: 11px;
  padding: 0 16px;
  color: var(--grammar-navy);
  background: #ffffff;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 850;
}

.grammar-lesson-footer button:hover,
.grammar-lesson-footer button:focus-visible {
  border-color: #8ebda7;
  background: #f1f8f4;
}

.grammar-lesson-footer button:disabled {
  cursor: default;
  opacity: 0.4;
}

.grammar-toast {
  position: fixed;
  z-index: 100;
  right: 22px;
  bottom: 22px;
  max-width: min(420px, calc(100vw - 32px));
  padding: 15px 18px;
  border: 1px solid #76b99b;
  border-radius: 13px;
  color: #ffffff;
  background: #174b38;
  box-shadow: 0 18px 42px rgba(10, 40, 28, 0.25);
  font-size: 0.86rem;
  font-weight: 800;
}

.grammar-toast[hidden] {
  display: none;
}

html.dark-mode .grammar-practice-page {
  --grammar-ink: #edf5ff;
  --grammar-muted: #aab8c9;
  --grammar-paper: #07111f;
  --grammar-card: #0e1b2d;
  --grammar-line: #2d4059;
  --grammar-mint-dark: #78dcb0;
  background: #07111f;
}

html.dark-mode .grammar-hero {
  border-color: #324762;
  background: #0e1b2d;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.24);
}

html.dark-mode .grammar-hero h1,
html.dark-mode .grammar-section-heading h2,
html.dark-mode .grammar-level-copy strong,
html.dark-mode .grammar-lesson-title strong,
html.dark-mode .grammar-lesson-header h2,
html.dark-mode .grammar-content-section > h3,
html.dark-mode .grammar-example-card strong,
html.dark-mode .grammar-question legend {
  color: #eef6ff;
}

html.dark-mode .grammar-hero-card,
html.dark-mode .grammar-level-card,
html.dark-mode .grammar-course-sidebar,
html.dark-mode .grammar-lesson-panel,
html.dark-mode .grammar-example-card,
html.dark-mode .grammar-question,
html.dark-mode .grammar-empty-state,
html.dark-mode .grammar-reset-button,
html.dark-mode .grammar-lesson-footer button {
  border-color: #2d4059;
  color: #edf5ff;
  background: #0e1b2d;
}

html.dark-mode .grammar-hero-card {
  box-shadow: 13px 14px 0 #173a31;
}

html.dark-mode .grammar-sentence {
  color: #eef6ff;
}

html.dark-mode .grammar-sentence-map span,
html.dark-mode .grammar-level-code,
html.dark-mode .grammar-lesson-number,
html.dark-mode .grammar-lesson-count {
  color: #b9c7d8;
  background: #17263a;
}

html.dark-mode .grammar-roadmap-scale a {
  color: #c8eedc;
  background: #153329;
}

html.dark-mode .grammar-roadmap-scale a:nth-child(2),
html.dark-mode .grammar-roadmap-scale a:nth-child(5) {
  color: #f5e5ad;
  background: #302a17;
}

html.dark-mode .grammar-roadmap-scale a:nth-child(3),
html.dark-mode .grammar-roadmap-scale a:nth-child(6) {
  color: #c8ddf1;
  background: #172b42;
}

html.dark-mode .grammar-roadmap-scale a:hover,
html.dark-mode .grammar-roadmap-scale a:focus-visible {
  color: #c9f8e4;
  background: #1a493a;
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.35), 0 0 0 1px currentColor;
}

html.dark-mode .grammar-roadmap-scale a:nth-child(2):hover,
html.dark-mode .grammar-roadmap-scale a:nth-child(2):focus-visible,
html.dark-mode .grammar-roadmap-scale a:nth-child(5):hover,
html.dark-mode .grammar-roadmap-scale a:nth-child(5):focus-visible {
  color: #ffe9a0;
  background: #4a3d18;
}

html.dark-mode .grammar-roadmap-scale a:nth-child(3):hover,
html.dark-mode .grammar-roadmap-scale a:nth-child(3):focus-visible,
html.dark-mode .grammar-roadmap-scale a:nth-child(6):hover,
html.dark-mode .grammar-roadmap-scale a:nth-child(6):focus-visible {
  color: #d8ecff;
  background: #203d5b;
}

@media (prefers-reduced-motion: reduce) {
  .grammar-roadmap-scale a,
  .grammar-roadmap-scale a::before,
  .grammar-roadmap-scale a::after {
    transition-duration: 1ms;
  }

  .grammar-roadmap-scale a:hover,
  .grammar-roadmap-scale a:focus-visible,
  .grammar-roadmap-scale a:nth-child(even):hover,
  .grammar-roadmap-scale a:nth-child(even):focus-visible {
    transform: none;
  }
}

html.dark-mode .grammar-empty-state h1,
html.dark-mode .grammar-level-topics li {
  color: #eef6ff;
}

html.dark-mode .grammar-level-card.is-active,
html.dark-mode .grammar-lesson-link.is-active {
  background: #112f29;
}

html.dark-mode .grammar-level-card:not(:disabled):hover,
html.dark-mode .grammar-lesson-link:hover {
  background: #14263a;
}

html.dark-mode .grammar-explanation,
html.dark-mode .grammar-option {
  border-color: #2d4059;
  color: #c5d1df;
  background: #101f32;
}

html.dark-mode .grammar-explanation p {
  color: #e3edf8;
}

html.dark-mode .grammar-option:has(input:checked) {
  border-color: #78dcb0;
  color: #c9f6e2;
  background: #14362e;
}

html.dark-mode .grammar-tip-card {
  border-color: #665925;
  background: #2e2a18;
}

html.dark-mode .grammar-tip-card strong {
  color: #f9e5a4;
}

html.dark-mode .grammar-tip-card p {
  color: #d5c689;
}

html.dark-mode .grammar-question.is-correct {
  border-color: #397d63;
  background: #0f2b24;
}

html.dark-mode .grammar-question.is-wrong {
  border-color: #7d4641;
  background: #2d1a1c;
}

html.dark-mode .grammar-question-explanation {
  color: #d7e3ef;
  background: #112f29;
}

html.dark-mode .grammar-question-explanation strong {
  color: #9be5c5;
}

html.dark-mode .grammar-explain-button:hover,
html.dark-mode .grammar-explain-button:focus-visible {
  color: #b5efd5;
}

html.dark-mode .grammar-complete-banner {
  border-color: #397d63;
  background: #102f27;
}

html.dark-mode .grammar-complete-banner strong {
  color: #c9f6e2;
}

html.dark-mode .grammar-complete-banner small {
  color: #99cbb6;
}

@media (max-width: 1050px) {
  .grammar-hero {
    grid-template-columns: 1fr;
  }

  .grammar-hero-card {
    width: min(100%, 560px);
    justify-self: start;
  }

  .grammar-level-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grammar-workspace {
    grid-template-columns: 1fr;
  }

  .grammar-course-sidebar {
    position: static;
  }

  .grammar-lesson-nav {
    max-height: none;
  }

  .grammar-lesson-nav ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .grammar-main {
    padding: 14px 12px 58px;
  }

  .grammar-hero {
    min-height: 0;
    padding: 25px 20px 34px;
    border-radius: 22px;
  }

  .grammar-back-link {
    margin-bottom: 30px;
  }

  .grammar-hero h1 {
    font-size: clamp(2.8rem, 15vw, 4.4rem);
  }

  .grammar-hero-card {
    padding: 22px;
    box-shadow: 8px 9px 0 #dcefe6;
  }

  .grammar-overview-page .grammar-hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 22px 18px 28px;
  }

  .grammar-overview-page .grammar-hero h1 {
    font-size: clamp(2.35rem, 12vw, 3.25rem);
  }

  .grammar-overview-page .grammar-hero-card {
    display: none;
  }

  .grammar-overview-page .grammar-back-link {
    margin-bottom: 22px;
  }

  .grammar-course-page .grammar-main {
    padding-top: 12px;
  }

  .grammar-course-toolbar {
    gap: 9px 16px;
    margin-bottom: 12px;
    padding: 0 3px 12px;
  }

  .grammar-course-toolbar small {
    flex-basis: 100%;
  }

  .grammar-placeholder-page .grammar-empty-state {
    padding: 18px 8px 50px;
  }

  .grammar-placeholder-page .grammar-empty-state .grammar-back-link {
    margin-bottom: 30px;
  }

  .grammar-level-section {
    padding: 58px 0;
  }

  .grammar-section-heading {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .grammar-level-grid,
  .grammar-lesson-nav ol,
  .grammar-example-list,
  .grammar-options,
  .grammar-explanation-grid {
    grid-template-columns: 1fr;
  }

  .grammar-level-card--overview {
    min-height: 0;
    padding: 22px;
  }

  .grammar-roadmap-scale {
    grid-template-columns: repeat(3, 1fr);
  }

  .grammar-empty-state {
    min-height: 0;
    padding: 30px 22px 40px;
    border-radius: 22px;
  }

  .grammar-lesson-nav {
    max-height: 370px;
  }

  .grammar-level-card {
    min-height: 138px;
  }

  .grammar-lesson-panel {
    min-height: 0;
    padding: 22px 16px;
    border-radius: 20px;
  }

  .grammar-lesson-header {
    grid-template-columns: 1fr;
  }

  .grammar-lesson-count {
    width: fit-content;
  }

  .grammar-practice-header {
    display: block;
  }

  .grammar-practice-header p {
    margin-top: 7px;
  }

  .grammar-question {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    padding: 16px 13px;
  }

  .grammar-question-status {
    width: 29px;
    height: 29px;
  }

  .grammar-explain-wrap {
    grid-column: 1 / -1;
    padding-left: 40px;
  }

  .grammar-complete-banner {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .grammar-complete-banner .grammar-next-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .grammar-lesson-footer button {
    flex: 1;
  }
}

@media (max-width: 430px) {
  .grammar-hero-actions,
  .grammar-primary-button {
    width: 100%;
  }

  .grammar-sentence-map {
    grid-template-columns: 1fr;
  }

  .grammar-sentence-map i {
    display: none;
  }

  .grammar-course-summary {
    padding: 20px 17px;
  }

  .grammar-level-card--overview .grammar-level-action {
    align-items: flex-start;
    flex-direction: column;
  }

  .grammar-placeholder-actions,
  .grammar-placeholder-actions .grammar-primary-button {
    width: 100%;
  }

  .grammar-explain-wrap {
    padding-left: 0;
  }
}