/* ========== NOTEBOOK ========== */
.nb-controls {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--bg); transition: background-color 0.2s, border-color 0.2s;
}
.nb-label { font-size: 12px; font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.05em; }
.nb-controls .menu-select { flex: 1; min-width: 140px; }
.nb-controls .dialog-input { flex: 1.2; min-width: 160px; }

.nb-main {
  flex: 1; overflow-y: auto; padding: 12px 16px;
}

.nb-section { margin-bottom: 18px; }
.nb-section-title {
  font-size: 13px; font-weight: 700; color: var(--text-2); text-transform: uppercase;
  letter-spacing: 0.06em; padding: 4px 0 8px; border-bottom: 1px solid var(--divider); margin-bottom: 8px;
}
.nb-empty { text-align: center; color: var(--text-2); font-size: 14px; padding: 40px 0; }

.nb-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px; margin-bottom: 8px; display: flex; gap: 14px; align-items: center;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.nb-card:hover { border-color: var(--accent); box-shadow: 0 4px 14px rgba(0,0,0,0.08); }
.nb-hz {
  font-family: var(--font-hz); font-size: 28px; font-weight: 400; color: var(--text-1);
  min-width: 64px; text-align: center; cursor: pointer; user-select: text;
}
.nb-info { flex: 1; min-width: 0; }
.nb-py { font-size: 14px; color: var(--accent); font-weight: 500; }
.nb-pos { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-2); margin-top: 2px; }
.nb-mean { font-size: 14px; color: var(--text-1); margin-top: 4px; line-height: 1.4; }

/* ========== COMMON CHARACTER BAR ========== */
.nb-common {
  display: flex; gap: 6px; align-items: center; padding: 8px 16px 10px; overflow-x: auto;
  border-bottom: 1px solid var(--border); background: var(--bg);
  scrollbar-width: thin; -ms-overflow-style: none;
}
.nb-common::-webkit-scrollbar { display: none; }

/* #commonBar now lives on its own page (common.html) → wrap instead of scrolling */
#commonBar {
  display: flex; flex-direction: column; gap: 8px;
  padding: 0; overflow: visible; border: none; background: transparent;
}

/* ========== COMMON CHARACTER PAGE ========== */
.cm-main {
  flex: 1; overflow-y: auto; padding: 24px 20px 32px;
}
.cm-heading {
  font-size: 20px; font-weight: 700; letter-spacing: -0.01em;
  color: var(--text-1); margin-bottom: 6px;
}
.cm-sub {
  font-size: 13px; color: var(--text-2); line-height: 1.5; margin-bottom: 22px;
}

/* ========== SIDE MENU NAVIGATION ========== */
.nav-link {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 11px 12px; margin-bottom: 6px;
  border: 1px solid transparent; border-radius: 10px;
  background: transparent; color: var(--text-1);
  font-size: 14px; font-weight: 500; font-family: var(--font-ui);
  text-decoration: none; cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.nav-link:hover { background: var(--accent-muted); color: var(--accent); }
.side-menu .nav-link.active {
  background: var(--accent); border-color: var(--accent);
  color: #fff; font-weight: 600;
}
.side-menu .nav-link.active:hover { background: var(--accent); color: #fff; }
/* ========== COMMON CHARACTER DRILL-DOWN ========== */
/* Level 1 & 2 reuse .nb-card rows (hanzi + pinyin + meaning) — buttons need a reset */
button.nb-card {
  width: 100%; text-align: left; font-family: var(--font-ui); color: var(--text-1);
  cursor: pointer; -webkit-tap-highlight-color: transparent; margin-bottom: 0;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}
button.nb-card:active { transform: scale(0.985); }
html.dark button.nb-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.5); }

/* Level 2 — words for a char */
.common-words {
  width: 100%; display: flex; flex-direction: column;
}
.common-words-head {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.common-back {
  flex-shrink: 0; padding: 8px 14px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--pill-bg); color: var(--text-1);
  font-size: 13.5px; font-weight: 500; font-family: var(--font-ui);
  cursor: pointer; -webkit-tap-highlight-color: transparent;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}
.common-back:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-muted); }
.common-back:active { transform: scale(0.97); }
.common-words-head > span {
  font-family: var(--font-hz); font-size: 20px; font-weight: 400; color: var(--text-1);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.common-word-list {
  width: 100%; display: flex; flex-direction: column; gap: 8px;
}
.common-empty {
  text-align: center; color: var(--text-2); font-size: 14px; padding: 40px 0;
}

/* ========== COMPOSITION (RELATED WORDS) ========== */
.dp-comp { padding: 6px 0; border-bottom: 1px dashed var(--divider); }
.dp-comp:last-child { border-bottom: none; }
.dp-comp-head { font-size: 13px; margin-bottom: 5px; }
.dp-comp-head b { font-family: var(--font-hz); font-size: 16px; font-weight: 400; }
.dp-rel { display: flex; flex-wrap: wrap; gap: 6px; }
.dp-rel-word {
  padding: 4px 9px; font-size: 12.5px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--pill-bg); color: var(--text-1); cursor: pointer; font-family: var(--font-hz);
  transition: border-color 0.15s, color 0.15s;
}
.dp-rel-word i { font-style: normal; color: var(--text-2); font-family: var(--font-ui); margin-left: 3px; font-size: 11px; }
.dp-rel-word:hover { border-color: var(--accent); color: var(--accent); }
.dp-rel-more { font-size: 11px; color: var(--text-2); align-self: center; }
.dp-rel-empty { font-size: 12px; color: var(--text-2); opacity: 0.6; }