:root {
  --blue: #1F4E79;
  --blue-dark: #163a5c;
  --bg: #f7f8fa;
  --card: #ffffff;
  --green: #2E7D32;
  --lvl-chu: #ffffff;
  --lvl-zhong: #FFF3CC;
  --lvl-gao: #F2D2CE;
  --lvl-yuan: #D9EAD3;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 0;
  background: var(--bg);
  color: #222;
}
header {
  background: var(--blue);
  color: #fff;
  padding: 28px 20px 22px;
  position: sticky;
  top: 0;
  z-index: 20;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
header h1 { margin: 0 0 2px; font-size: 26px; }
header .subtitle { font-size: 14px; color: #dbe6f2; margin: 2px 0 0; }
header .desc { font-size: 13px; color: #c7d9ea; margin: 8px 0 0; line-height: 1.6; max-width: 760px; }
.searchwrap { margin-top: 16px; max-width: 640px; }
#search {
  width: 100%;
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  font-size: 16px;
  outline: none;
}
.levelbar { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.lvl-btn {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  padding: 5px 12px;
  border-radius: 16px;
  font-size: 12.5px;
  cursor: pointer;
  user-select: none;
}
.lvl-btn.active { background: #fff; color: var(--blue); font-weight: 600; }
.stats { font-size: 12.5px; color: #b9cfe6; margin-top: 10px; }

nav.tabs {
  display: flex;
  gap: 4px;
  background: var(--card);
  padding: 6px 14px 0;
  border-bottom: 1px solid #e3e6ea;
  position: sticky;
  top: 148px;
  z-index: 15;
  overflow-x: auto;
}
nav.tabs button {
  background: none;
  border: none;
  padding: 10px 16px;
  font-size: 14.5px;
  color: #667;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
nav.tabs button.active { color: var(--blue); border-bottom-color: var(--blue); font-weight: 600; }

main { max-width: 920px; margin: 0 auto; padding: 16px 14px 60px; }
.tabpanel { display: none; }
.tabpanel.active { display: block; }

.card {
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  padding: 4px 8px;
  margin-bottom: 14px;
  overflow: hidden;
}
.entry {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 8px;
  border-bottom: 1px solid #f1f1f1;
}
.entry:last-child { border-bottom: none; }
.play-btn {
  flex: 0 0 auto;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  cursor: pointer;
  margin-top: 2px;
}
.play-btn:hover { background: var(--blue-dark); }
.play-btn.playing { background: var(--green); }
.entry-body { flex: 1 1 auto; min-width: 0; }
.entry-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.nova-word { font-weight: 700; font-size: 18px; color: var(--blue); }
.badge {
  font-size: 10.5px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid #ddd;
  color: #666;
  white-space: nowrap;
}
.badge.lvl-初 { background: var(--lvl-chu); }
.badge.lvl-中 { background: var(--lvl-zhong); border-color: #e8d998; }
.badge.lvl-高 { background: var(--lvl-gao); border-color: #e3b6b1; }
.badge.lvl-原 { background: var(--lvl-yuan); border-color: #bcd9bc; }
.badge.pos { background: #eef3f8; border-color: #d7e3ee; color: var(--blue); }
.gloss { margin-top: 3px; font-size: 14px; color: #444; }
.gloss .en { color: #777; font-style: italic; margin-right: 10px; }
.example { margin-top: 8px; padding: 8px 10px; background: #f4f7fa; border-radius: 8px; font-size: 13px; }
.example .ex-nova { font-weight: 600; color: #1F4E79; }
.example .ex-gloss { color: #666; margin-top: 2px; }
.example-row { display: flex; align-items: flex-start; gap: 8px; }
.example-row .play-btn { width: 26px; height: 26px; font-size: 11px; margin-top: 1px; }

.empty { padding: 40px 10px; text-align: center; color: #999; }
.loadmore { text-align: center; padding: 14px; }
.loadmore button {
  background: var(--blue); color: #fff; border: none; padding: 10px 22px;
  border-radius: 20px; font-size: 14px; cursor: pointer;
}

.gloss-tool textarea {
  width: 100%; min-height: 90px; padding: 12px; border-radius: 10px;
  border: 1px solid #ccd5dd; font-size: 15px; font-family: inherit; resize: vertical;
}
.gloss-tool .runbtn {
  margin-top: 10px; background: var(--blue); color: #fff; border: none;
  padding: 10px 22px; border-radius: 20px; font-size: 14px; cursor: pointer;
}
.gloss-output { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 10px; }
.gloss-chip {
  background: var(--card); border-radius: 10px; box-shadow: 0 1px 3px rgba(0,0,0,.08);
  padding: 8px 10px; min-width: 92px; text-align: center;
}
.gloss-chip .gc-word { font-weight: 700; color: var(--blue); font-size: 15px; }
.gloss-chip .gc-meaning { font-size: 11.5px; color: #666; margin-top: 3px; }
.gloss-chip.unknown { opacity: .55; }
.gloss-chip .gc-meaning.unknown-tag { color: #b33; }
.about p { font-size: 14.5px; line-height: 1.8; color: #444; }
.about h3 { color: var(--blue); font-size: 16px; margin: 18px 0 6px; }

footer { text-align: center; color: #999; font-size: 12px; padding: 24px; }