/* =========================================================
   Grammar Studio · 语法学习
   ========================================================= */

/* ---------- dashboard entry ---------- */

.grammar-home { margin-bottom: 96px; }

.grammar-home-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
}

.grammar-home-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 286px;
  padding: 28px 30px;
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.24s, box-shadow 0.24s, border-color 0.24s;
}

.grammar-home-card:hover { transform: translateY(-3px); }

.grammar-home-card.is-learn {
  color: #f4ead4;
  background: var(--forest);
  box-shadow: var(--shadow-md);
}

.grammar-home-card.is-learn::before {
  content: "";
  position: absolute;
  right: -90px;
  top: -130px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(243, 223, 185, 0.2), transparent 68%);
}

.grammar-home-card.is-learn::after {
  content: "GRAMMAR";
  position: absolute;
  right: 18px;
  bottom: -18px;
  font-family: var(--serif);
  font-size: 72px;
  letter-spacing: 0.04em;
  color: rgba(243, 223, 185, 0.05);
  pointer-events: none;
}

.grammar-home-card.is-practice {
  background: linear-gradient(155deg, rgba(255, 253, 248, 0.96), rgba(251, 246, 235, 0.8));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.ghc-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ghc-no {
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber-deep);
}

.is-learn .ghc-no { color: var(--amber-soft); }
.is-learn .pill.green {
  color: var(--amber-soft);
  border-color: rgba(243, 223, 185, 0.25);
  background: rgba(243, 223, 185, 0.1);
}

.grammar-home-card h3 {
  position: relative;
  z-index: 1;
  margin: 24px 0 10px;
  font-family: var(--serif);
  font-size: clamp(27px, 3vw, 36px);
  font-weight: 500;
  line-height: 1.15;
}

.grammar-home-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 430px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.grammar-home-card.is-learn p { color: #c9d8cd; }

.ghc-foot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: auto;
  padding-top: 26px;
  font-size: 11px;
  color: var(--ink-faint);
}

.is-learn .ghc-foot {
  color: #b9c9bf;
  border-top: 1px solid rgba(243, 223, 185, 0.18);
  padding-top: 18px;
}

.ghc-foot b {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
  color: var(--amber-soft);
  margin-right: 3px;
}

.is-practice .ghc-foot b { color: var(--forest); }

.ghc-go {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
  color: var(--forest);
  white-space: nowrap;
}

.is-learn .ghc-go { color: var(--amber-soft); }
.ghc-go svg { width: 14px; height: 14px; transition: transform 0.2s; }
.grammar-home-card:hover .ghc-go svg { transform: translateX(3px); }

.ghc-mastery {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding-top: 20px;
}

.ghc-mastery small {
  display: block;
  margin-top: 6px;
  font-size: 9.5px;
  color: var(--ink-faint);
}

/* ---------- shared mastery bar ---------- */

.grammar-mastery-bar {
  height: 6px;
  margin: 8px 0 0;
  border-radius: 999px;
  background: var(--paper-deep);
  overflow: hidden;
}

.grammar-mastery-bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--amber), var(--amber-deep));
  transition: width 0.45s ease;
}

.gm-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 10.5px;
  color: var(--ink-soft);
}

.gm-label b {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--forest);
  line-height: 1;
}

/* ---------- studio shell ---------- */

.grammar-studio-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 24px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.6);
}

.grammar-studio-tab {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 13px 16px;
  border: 0;
  border-radius: 13px;
  background: transparent;
  color: var(--ink-soft);
  text-align: left;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.grammar-studio-tab:hover { background: var(--card); }
.grammar-studio-tab.is-active {
  color: #f7f0df;
  background: var(--forest);
  box-shadow: 0 8px 22px rgba(23, 59, 50, 0.18);
}

.gst-no {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--amber-deep);
}

.grammar-studio-tab.is-active .gst-no { color: var(--amber-soft); }
.grammar-studio-tab b { display: block; font-size: 13.5px; font-weight: 600; }
.grammar-studio-tab small { display: block; margin-top: 2px; font-size: 9.5px; opacity: 0.68; }

/* ---------- knowledge learning ---------- */

.grammar-learn-layout {
  display: grid;
  grid-template-columns: 334px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.grammar-browser {
  position: sticky;
  top: calc(var(--header-h) + 18px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 253, 248, 0.68);
  overflow: hidden;
}

.grammar-browser-tools {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.grammar-browser-tools .search-box { width: 100%; }
.grammar-browser-tools .search-box input { height: 38px; font-size: 11.5px; }

.grammar-book-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px;
}
.grammar-book-tabs .book-tab {
  justify-content: center;
  padding: 7px 4px;
  font-size: 10px;
}
.grammar-book-tabs .book-tab span { font-size: 9px; }

.grammar-browser-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 9.5px;
  color: var(--ink-faint);
}

.grammar-browser-caption b { color: var(--forest); }

.grammar-point-list {
  max-height: 560px;
  padding: 6px;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--paper-deep) transparent;
}

.grammar-point-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: 9px;
  align-items: center;
  width: 100%;
  padding: 10px 11px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  text-align: left;
  transition: background 0.18s, color 0.18s;
}

.grammar-point-item:hover { background: var(--card); }
.grammar-point-item.is-active { color: #f7f0df; background: var(--forest); }

.gpi-no {
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--amber-deep);
}

.grammar-point-item.is-active .gpi-no { color: var(--amber-soft); }

.gpi-main b {
  display: block;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
}

.gpi-main small {
  display: block;
  margin-top: 2px;
  font-size: 8.5px;
  color: var(--ink-faint);
}

.grammar-point-item.is-active .gpi-main small { color: #b9c9bf; }

.gpi-pct {
  font-family: var(--serif);
  font-size: 11px;
  color: var(--ink-faint);
  white-space: nowrap;
}

.gpi-pct.is-started { color: var(--amber-deep); }
.grammar-point-item.is-active .gpi-pct { color: var(--amber-soft); }

.grammar-point-empty,
.grammar-detail-empty,
.grammar-empty-state {
  padding: 36px 24px;
  text-align: center;
  color: var(--ink-soft);
}

.grammar-point-empty { font-size: 11.5px; }
.grammar-detail-empty .empty-icon,
.grammar-empty-state .empty-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--forest-soft);
  color: var(--forest);
}

.grammar-detail-empty h3,
.grammar-empty-state h3 {
  margin: 0 0 7px;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
  color: var(--forest);
}

.grammar-detail-empty p,
.grammar-empty-state p {
  margin: 0 auto;
  max-width: 360px;
  font-size: 11.5px;
  line-height: 1.8;
}

.grammar-empty-state .btn { margin-top: 18px; }

.grammar-detail-card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(155deg, rgba(255, 253, 248, 0.98), rgba(251, 246, 235, 0.78));
  box-shadow: var(--shadow-sm);
}

.grammar-detail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.grammar-detail-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.grammar-detail-pct { font-size: 10px; color: var(--ink-faint); white-space: nowrap; }

.grammar-detail-source {
  margin-top: 26px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.grammar-detail-card h2 {
  margin: 8px 0 18px;
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 500;
  line-height: 1.18;
  color: var(--forest);
}

.formula-lg {
  margin-bottom: 18px;
  padding: 8px 13px;
  font-size: 12px;
}

.grammar-term-card {
  margin: 0 0 18px;
  padding: 16px 18px;
  border: 1px solid rgba(197, 125, 50, 0.24);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(243, 223, 185, 0.55), rgba(255, 253, 248, 0.6));
}

.grammar-term-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 9px;
}

.grammar-term-label {
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber-deep);
  text-transform: uppercase;
}

.grammar-term-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--forest);
}

.grammar-term-def {
  margin: 7px 0 0;
  font-size: 12px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.grammar-term-examples {
  display: grid;
  gap: 6px;
  margin-top: 10px;
  padding-top: 9px;
  border-top: 1px dashed rgba(197, 125, 50, 0.26);
}

.grammar-term-example {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.5;
  color: var(--forest);
}

.grammar-term-example span {
  display: block;
  margin-top: 1px;
  font-family: var(--sans);
  font-size: 10.5px;
  color: var(--ink-faint);
}

.grammar-detail-cn {
  margin: 0 0 24px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.grammar-detail-examples { display: grid; gap: 10px; }

.grammar-detail-example {
  padding: 15px 17px;
  border-left: 2px solid var(--amber);
  border-radius: 0 10px 10px 0;
  background: rgba(243, 223, 185, 0.22);
}

.grammar-detail-example p {
  margin: 0;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.6;
  color: var(--forest);
}

.grammar-detail-example span {
  display: block;
  margin-top: 5px;
  font-size: 11px;
  color: var(--ink-soft);
}

.grammar-detail-pitfall {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 10px;
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px dashed rgba(178, 83, 56, 0.3);
  border-radius: 12px;
  background: rgba(178, 83, 56, 0.045);
}

.grammar-detail-pitfall span {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--rust);
}

.grammar-detail-pitfall p {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.grammar-detail-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 22px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.grammar-detail-foot .grammar-mastery { flex: 1; max-width: 360px; }
.grammar-detail-foot small { display: block; margin-top: 6px; font-size: 9px; color: var(--ink-faint); }

/* ---------- practice ---------- */

.grammar-practice-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.grammar-practice-head h2 {
  margin: 8px 0 4px;
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  line-height: 1.2;
}

.grammar-practice-head p { margin: 0; font-size: 11.5px; color: var(--ink-soft); }

.grammar-practice-stats { display: flex; gap: 8px; }

.grammar-practice-stats div {
  min-width: 80px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 253, 248, 0.6);
  text-align: center;
}

.grammar-practice-stats b {
  display: block;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--forest);
}

.grammar-practice-stats span { display: block; margin-top: 3px; font-size: 9px; color: var(--ink-faint); }

.grammar-practice-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.grammar-scope-pill { gap: 7px; padding-right: 7px; }

.grammar-scope-pill button {
  display: grid;
  place-items: center;
  padding: 2px;
  border: 0;
  background: transparent;
  color: inherit;
}

.grammar-scope-pill svg { width: 12px; height: 12px; }

.grammar-practice-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

.gpc-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.gpc-count {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

.gpc-progress {
  height: 4px;
  margin: 14px 0 22px;
  border-radius: 999px;
  background: var(--paper-deep);
  overflow: hidden;
}

.gpc-progress i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--amber);
  transition: width 0.35s;
}

.gpc-topic { font-size: 9.5px; letter-spacing: 0.08em; color: var(--amber-deep); }

.grammar-question-prompt {
  margin: 10px 0 24px;
  font-family: var(--serif);
  font-size: clamp(21px, 2.2vw, 28px);
  font-weight: 500;
  line-height: 1.7;
  color: var(--forest);
}

.grammar-blank {
  display: inline-block;
  min-width: 38px;
  border-bottom: 1px solid var(--amber);
  text-align: center;
  color: var(--amber-deep);
}

.grammar-options { display: grid; gap: 10px; }

.grammar-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 253, 248, 0.6);
  text-align: left;
  transition: border-color 0.18s, background 0.18s, transform 0.18s;
}

.grammar-option:hover:not(:disabled) {
  border-color: var(--amber);
  background: var(--amber-glow);
  transform: translateY(-1px);
}

.grammar-option.is-selected { border-color: var(--forest); background: var(--forest-soft); }
.grammar-option.is-correct { border-color: rgba(47, 107, 79, 0.55); background: rgba(220, 231, 223, 0.72); }
.grammar-option.is-wrong { border-color: rgba(178, 83, 56, 0.55); background: rgba(178, 83, 56, 0.075); }
.grammar-option:disabled { cursor: default; opacity: 1; }

.go-letter {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
}

.is-selected .go-letter { color: #fff; background: var(--forest); border-color: var(--forest); }
.is-correct .go-letter { color: #fff; background: #2f6b4f; border-color: #2f6b4f; }
.is-wrong .go-letter { color: #fff; background: var(--rust); border-color: var(--rust); }

.go-text { padding-top: 3px; font-size: 13px; line-height: 1.65; }
.is-correct .go-text { color: #1f5a3f; }
.is-wrong .go-text { color: var(--rust); }

.grammar-practice-actions {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.gpa-note { font-size: 10px; color: var(--ink-faint); }

.grammar-practice-actions .btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.grammar-feedback-slot:empty { display: none; }

.grammar-feedback {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card-warm);
}

.grammar-feedback.is-correct {
  border-color: rgba(47, 107, 79, 0.3);
  background: rgba(220, 231, 223, 0.4);
}

.grammar-feedback.is-wrong {
  border-color: rgba(178, 83, 56, 0.25);
  background: rgba(178, 83, 56, 0.04);
}

.gf-head { display: flex; align-items: flex-start; gap: 12px; }

.gf-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--forest);
  font-size: 13px;
}

.is-wrong .gf-mark { background: var(--rust); }
.gf-head b { font-size: 13.5px; }
.gf-head p { margin: 3px 0 0; font-size: 11.5px; line-height: 1.7; color: var(--ink-soft); }

.gf-explain {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 9px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.gf-explain span { font-size: 9.5px; font-weight: 700; color: var(--amber-deep); }
.gf-explain p { margin: 0; font-size: 12px; line-height: 1.8; color: var(--ink-soft); }

.gf-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  font-size: 9px;
  color: var(--ink-faint);
}

.gf-meta b { color: var(--forest); }

/* ---------- summary ---------- */

.grammar-summary-card {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(155deg, rgba(255, 253, 248, 0.98), rgba(251, 246, 235, 0.8));
  box-shadow: var(--shadow-sm);
}

.grammar-summary-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.grammar-summary-card h2 {
  margin: 12px 0 24px;
  font-family: var(--serif);
  font-size: clamp(27px, 3vw, 38px);
  font-weight: 500;
  color: var(--forest);
}

.grammar-summary-main {
  display: grid;
  grid-template-columns: 154px minmax(0, 1fr);
  gap: 30px;
  align-items: center;
}

.grammar-summary-score {
  display: grid;
  place-items: center;
  width: 150px;
  height: 150px;
  border: 8px solid var(--amber-soft);
  border-radius: 50%;
  background: var(--card);
  text-align: center;
}

.grammar-summary-score b {
  display: block;
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 500;
  line-height: 1;
  color: var(--forest);
}

.grammar-summary-score span { display: block; margin-top: 6px; font-size: 9px; color: var(--ink-faint); }

.grammar-summary-copy p { margin: 0; font-size: 12.5px; line-height: 1.8; color: var(--ink-soft); }

.grammar-summary-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 18px;
}

.grammar-summary-stats div {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 253, 248, 0.6);
}

.grammar-summary-stats b {
  display: block;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--forest);
}

.grammar-summary-stats span { display: block; margin-top: 2px; font-size: 9px; color: var(--ink-faint); }

.grammar-summary-wrong {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 22px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--amber-glow);
  font-size: 10.5px;
  color: var(--ink-soft);
}

.grammar-summary-wrong b { flex-shrink: 0; color: var(--amber-deep); }
.grammar-summary-wrong.is-perfect { background: var(--forest-soft); }
.grammar-summary-wrong.is-perfect b { color: var(--forest); }

.grammar-summary-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

/* ---------- grammar map banner ---------- */

.grammar-map-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-bottom: 24px;
  padding: 18px 22px;
  border: 1px solid rgba(197, 125, 50, 0.22);
  border-radius: 16px;
  background: linear-gradient(100deg, var(--amber-glow), rgba(255, 253, 248, 0.6));
}

.grammar-map-banner > div { display: flex; flex-direction: column; gap: 3px; }
.grammar-map-banner .eyebrow { font-size: 8.5px; }
.grammar-map-banner b { font-family: var(--serif); font-size: 18px; font-weight: 500; color: var(--forest); }
.grammar-map-banner span:not(.eyebrow) { font-size: 10.5px; color: var(--ink-soft); }

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .grammar-home-grid { grid-template-columns: 1fr; }
  .grammar-home-card { min-height: 250px; }
  .grammar-learn-layout { grid-template-columns: 1fr; }
  .grammar-browser { position: static; }
  .grammar-point-list { max-height: 320px; }
  .grammar-practice-head { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 760px) {
  .grammar-home { margin-bottom: 64px; }
  .grammar-home-card { min-height: 0; padding: 22px; }
  .grammar-home-card h3 { margin-top: 18px; }
  .grammar-home-card::after { display: none; }
  .grammar-studio-tabs { grid-template-columns: 1fr; }
  .grammar-studio-tab small { display: none; }
  .grammar-detail-card,
  .grammar-practice-card,
  .grammar-summary-card { padding: 20px; }
  .grammar-detail-top { align-items: flex-start; flex-direction: column; }
  .grammar-detail-foot { align-items: flex-start; flex-direction: column; }
  .grammar-detail-foot .grammar-mastery { max-width: none; width: 100%; }
  .grammar-practice-head h2 { font-size: 27px; }
  .grammar-practice-stats { width: 100%; }
  .grammar-practice-stats div { flex: 1; min-width: 0; }
  .grammar-practice-actions .btn { flex: 1; }
  .grammar-summary-main { grid-template-columns: 1fr; gap: 20px; }
  .grammar-summary-score { width: 120px; height: 120px; margin: 0 auto; }
  .grammar-summary-score b { font-size: 31px; }
  .grammar-summary-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grammar-map-banner { align-items: flex-start; flex-direction: column; }
  .grammar-question-prompt { font-size: 20px; }
  .gf-meta { align-items: flex-start; flex-direction: column; gap: 4px; }
}