* { box-sizing: border-box; }
body.grammar-page {
  font-family: -apple-system, sans-serif;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px 24px;
  line-height: 1.5;
  background: #f7f7f7;
  color: #111;
}
.grammar-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0 12px;
  border-bottom: 1px solid #e8e8e8;
  margin-bottom: 16px;
}
.grammar-header .back {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-top: 2px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid #ddd;
  color: #444;
  text-decoration: none;
  font-size: 20px;
}
.grammar-header .back:hover { border-color: #c0392b; color: #c0392b; }
.grammar-header-main { min-width: 0; flex: 1; }
.grammar-group-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #888;
  margin: 0 0 4px;
}
.grammar-title {
  font-size: 22px;
  margin: 0 0 4px;
  color: #c0392b;
  line-height: 1.25;
}
.grammar-subtitle {
  margin: 0;
  font-size: 14px;
  color: #777;
}
.grammar-hint {
  margin: 0 0 16px;
  font-size: 14px;
  color: #555;
  line-height: 1.55;
}
.verb-picker {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.verb-picker label { display: block; font-size: 13px; color: #666; margin-bottom: 6px; }
#verb-input,
#predicate-input,
#adj-input {
  width: 100%;
  max-width: 320px;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 8px;
}
.stem-hint { display: block; margin-top: 8px; font-size: 13px; color: #666; }
.grammar-content {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 18px 16px 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.mode-tab {
  border: 1px solid #ddd;
  background: #fafafa;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  color: #333;
}
.mode-tab.active {
  background: #c0392b;
  border-color: #c0392b;
  color: #fff;
}
.abil-tense-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 14px;
}
.abil-tense-tab {
  border: 1px solid #d5c4b8;
  background: #faf6f3;
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 13px;
  cursor: pointer;
  color: #5c4033;
}
.abil-tense-tab.active {
  background: #7f5539;
  border-color: #7f5539;
  color: #fff;
}
.abil-tense-title {
  font-size: 16px;
  margin: 0 0 12px;
  color: #5c4033;
}
.abil-tense-title .sub {
  font-weight: 400;
  font-size: 13px;
  color: #888;
}
.mode-title {
  font-size: 15px;
  margin: 0 0 12px;
  color: #444;
}
.mode-title .badge {
  display: inline-block;
  min-width: 1.6em;
  text-align: center;
  background: #eee;
  border-radius: 6px;
  margin-right: 6px;
  font-weight: 700;
}
.mode-panel:not([hidden]) .mode-title .badge { background: #fdecea; color: #c0392b; }
.tables {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 720px) {
  .tables { grid-template-columns: 1fr 1fr; }
}
.table-block h5 {
  margin: 0 0 8px;
  font-size: 15px;
  color: #222;
}
.table-block h5 .sub { font-weight: 400; color: #888; font-size: 13px; }
.table-block.copula h5 { color: #7f5539; }
.conj-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.conj-table th {
  background: #2c3e50;
  color: #fff;
  font-size: 12px;
  padding: 8px 10px;
  text-align: left;
}
.conj-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #eee;
  vertical-align: top;
}
.conj-table td.pron { width: 56px; color: #666; font-size: 13px; }
.conj-table td.form { font-weight: 600; width: 42%; }
.conj-table td.ru { font-size: 13px; color: #555; }
.pattern-table td.struct { width: 28%; font-size: 13px; color: #5c4033; font-weight: 600; }
.diff-box {
  background: #f8f4f0;
  border: 1px solid #e8dcd2;
  border-radius: 12px;
  padding: 14px 16px;
  margin: 0 0 18px;
}
.diff-title { font-size: 15px; margin: 0 0 12px; color: #5c4033; }
.diff-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
@media (min-width: 640px) {
  .diff-grid { grid-template-columns: 1fr 1fr; }
}
.diff-col h4 { font-size: 14px; margin: 0 0 6px; color: #2c3e50; }
.diff-col p { margin: 0 0 8px; font-size: 13px; color: #555; line-height: 1.5; }
.diff-col ul { margin: 0; padding-left: 18px; font-size: 13px; color: #444; line-height: 1.55; }
.diff-col li { margin-bottom: 4px; }
.diff-compare {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid #e8dcd2;
  font-size: 13px;
  color: #444;
  line-height: 1.55;
}
.pattern-group-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 14px;
}
.pattern-group-tab {
  border: 1px solid #c5d5e8;
  background: #f4f8fc;
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 13px;
  cursor: pointer;
  color: #2c5282;
}
.pattern-group-tab.active {
  background: #2c5282;
  border-color: #2c5282;
  color: #fff;
}
.pattern-group-title {
  font-size: 15px;
  margin: 0 0 10px;
  color: #2c5282;
}
.pattern-group-title .sub { font-weight: 400; font-size: 13px; color: #888; }
.grammar-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #e8e8e8;
  font-size: 14px;
}
.grammar-footer a {
  color: #2c3e50;
  text-decoration: none;
  font-weight: 600;
  max-width: 46%;
  line-height: 1.4;
}
.grammar-footer a:hover { color: #c0392b; }
.grammar-footer .nav-disabled {
  color: #bbb;
  max-width: 46%;
}
.error {
  padding: 14px 16px;
  background: #fff3f3;
  border: 1px solid #f0c4bf;
  border-radius: 10px;
  color: #8e2e24;
  font-size: 14px;
}