:root {
  --bg: #faf9f6;
  --fg: #22201c;
  --muted: #8a857c;
  --line: #e7e3da;
  --accent: #c0562f;
  --accent-soft: #f4e6df;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px calc(48px + env(safe-area-inset-bottom));
  line-height: 1.5;
}

/* ---- header ---- */
header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}

#title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#back {
  border: none;
  background: none;
  font-size: 1.7rem;
  line-height: 1;
  color: var(--accent);
  cursor: pointer;
  padding: 0 4px;
}

.controls { display: flex; gap: 8px; }

.controls button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--fg);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}
.controls button:active { background: var(--accent-soft); }

/* ---- story list ---- */
.level {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 20px 0 8px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  cursor: pointer;
}
.card:active { background: var(--accent-soft); }

.card-title { font-size: 1.1rem; font-weight: 600; }
.card-sub { font-size: 0.85rem; color: var(--muted); margin-top: 2px; }

.empty { color: var(--muted); }

/* ---- story text ---- */
.story-meta { color: var(--muted); font-size: 0.85rem; margin-bottom: 8px; }

.chapter-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
  margin: 22px 0 8px;
}

.para { margin: 0 0 14px; }

.sent {
  position: relative;
  font-size: 1.45rem;
  line-height: 1.9;
  margin: 0 0 6px;
  padding-right: 44px;
  transition: background 0.15s;
}
.sent.current { background: #fff7e0; border-radius: 6px; }

.tok { margin: 0 1px; }
.tok.w { cursor: pointer; }
.tok.w:active { background: var(--accent-soft); border-radius: 4px; }

ruby { ruby-align: center; }
rt { font-size: 0.5em; color: var(--muted); }
.no-pinyin rt { display: none; }

.play {
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  color: var(--accent);
}
.play:active { background: var(--accent-soft); }

/* ---- popover ---- */
.popover {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 18px 20px calc(18px + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
  z-index: 10;
  max-width: 720px;
  margin: 0 auto;
}

.pop-hanzi { font-size: 1.7rem; font-weight: 600; }
.pop-pinyin { font-size: 1.1rem; color: var(--accent); margin-top: 2px; }
.pop-gloss { font-size: 1rem; color: var(--fg); margin-top: 6px; }