/* Seção de Gramática — Vamos a Estudiar Español */
.hero-actions button {
  width: 178px;
  min-height: 48px;
  margin-top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* Padronização visual dos três botões do destaque inicial */
.hero-actions .primary-button {
  border: 1px solid rgba(143, 29, 44, 0.30);
  background: white;
  color: var(--red);
  box-shadow: none;
}

.hero-actions .primary-button:hover,
.hero-actions .primary-button:focus-visible {
  border-color: var(--red);
  background: #fff8f3;
  color: var(--red);
  transform: none;
  outline: none;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grammar-heading {
  max-width: 820px;
  margin-bottom: 24px;
}

.grammar-source-note {
  margin: 0 0 24px;
  padding: 15px 17px;
  border: 1px dashed rgba(143, 29, 44, .22);
  border-radius: 16px;
  background: rgba(255,255,255,.62);
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.6;
}

.grammar-source-note strong {
  color: var(--red-dark);
}

.grammar-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.7);
  color: var(--muted);
  font-size: .9rem;
}

.grammar-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.grammar-filter-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: var(--muted);
  padding: 8px 12px;
  font-weight: 800;
  cursor: pointer;
}

.grammar-filter-button:hover,
.grammar-filter-button.active {
  border-color: rgba(143,29,44,.32);
  color: var(--red-dark);
  background: #fff6f0;
}

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

.grammar-card {
  position: relative;
  min-width: 0;
  min-height: 292px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,.95);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(70,40,20,.055);
  display: flex;
  flex-direction: column;
}

.grammar-card::after {
  content: "¿?";
  position: absolute;
  right: -10px;
  bottom: -32px;
  color: rgba(143,29,44,.04);
  font: 900 7.5rem Georgia,"Times New Roman",serif;
  pointer-events: none;
}

.grammar-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 22px;
}

.grammar-level {
  display: inline-flex;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--gold-soft);
  color: #6b4a0d;
  font-size: .74rem;
  font-weight: 900;
  letter-spacing: .04em;
}

.grammar-time {
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
}

.grammar-category {
  margin: 0 0 8px;
  color: var(--red);
  font-size: .76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.grammar-card h2 {
  font-size: 1.55rem;
  margin-bottom: 10px;
}

.grammar-card > p:not(.grammar-category) {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.58;
  font-size: .94rem;
}

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

.grammar-card-footer .primary-button {
  margin-top: 0;
}

.grammar-status {
  color: var(--success);
  font-size: .78rem;
  font-weight: 900;
}

.grammar-reader-screen {
  max-width: 980px;
  margin: 0 auto;
}

.grammar-reader-back {
  margin-bottom: 20px;
}

.grammar-article-layout {
  display: grid;
  grid-template-columns: minmax(0,1.6fr) minmax(270px,.65fr);
  gap: 24px;
  align-items: start;
}

.grammar-paper {
  border: 1px solid #e6dac7;
  border-radius: 28px;
  background: #fffdf8;
  box-shadow: var(--shadow);
  padding: clamp(28px, 5vw, 52px);
}

.grammar-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.grammar-article-meta span {
  border-radius: 999px;
  padding: 7px 11px;
  background: #f6ead3;
  color: #70531b;
  font-size: .77rem;
  font-weight: 900;
}

.grammar-paper h1 {
  font-size: clamp(2.1rem,5vw,3.8rem);
}

.grammar-lead {
  margin: 18px 0 30px;
  padding-left: 16px;
  border-left: 4px solid var(--gold);
  color: var(--red-dark);
  font: italic 1.05rem/1.7 Georgia,"Times New Roman",serif;
}

.grammar-section {
  margin-top: 30px;
}

.grammar-section h2 {
  color: var(--ink);
  font-size: 1.55rem;
  margin-bottom: 12px;
}

.grammar-section p {
  margin: 0 0 13px;
  color: #46413b;
  line-height: 1.75;
}

.grammar-example-list {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
}

.grammar-example {
  border-left: 3px solid rgba(143,29,44,.4);
  border-radius: 0 12px 12px 0;
  background: #fff7ef;
  padding: 11px 14px;
  color: #3f3934;
  line-height: 1.55;
}

.grammar-tip {
  margin-top: 17px;
  border-radius: 15px;
  background: #fff3cf;
  padding: 14px 16px;
  color: #604918;
  line-height: 1.55;
  font-size: .92rem;
}

.grammar-finish {
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.grammar-finish .primary-button {
  margin-top: 0;
}

.grammar-saved-note {
  color: var(--success);
  font-weight: 800;
  font-size: .86rem;
}

.grammar-sidebar {
  display: grid;
  gap: 18px;
  position: sticky;
  top: 112px;
}

.grammar-summary-card,
.grammar-check-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,.95);
  padding: 22px;
  box-shadow: 0 10px 28px rgba(70,40,20,.05);
}

.grammar-summary-card h2,
.grammar-check-card h2 {
  font-size: 1.45rem;
  margin-bottom: 14px;
}

.grammar-summary-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.grammar-summary-list li {
  margin: 8px 0;
  line-height: 1.5;
}

.grammar-check-question {
  color: var(--ink);
  font-weight: 900;
  line-height: 1.45;
  margin-bottom: 12px;
}

.grammar-check-options {
  display: grid;
  gap: 8px;
}

.grammar-check-option {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--muted);
  line-height: 1.4;
  font-size: .9rem;
}

.grammar-check-option input {
  margin-top: 3px;
  accent-color: var(--red);
}

.grammar-check-button {
  width: 100%;
  margin-top: 15px;
}

.grammar-check-result {
  margin-top: 13px;
  border-radius: 13px;
  padding: 12px 13px;
  background: #fff8e7;
  color: var(--ink);
  font-size: .88rem;
  font-weight: 800;
  line-height: 1.5;
}

.grammar-check-result.good {
  background: var(--success-bg);
  color: var(--success);
}

.grammar-check-result.needs-work {
  background: var(--error-bg);
  color: var(--error);
}

@media (max-width: 1000px) {
  .feature-grid,
  .grammar-grid {
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
  .grammar-article-layout {
    grid-template-columns: 1fr;
  }
  .grammar-sidebar {
    position: static;
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
}

@media (max-width: 720px) {
  .feature-grid,
  .grammar-grid,
  .grammar-sidebar {
    grid-template-columns: 1fr;
  }
  .grammar-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions button {
    width: 100%;
  }
  .grammar-paper {
    padding: 24px 20px;
  }
}