:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --border: #e3e6ea;
  --accent: #2563eb;
  --accent-bg: #e8f0fe;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --bad: #b91c1c;
  --bad-bg: #fee2e2;
  --star: #d97706;
  --mask: #9ca3af;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --panel: #1a1f26;
    --text: #e6e8eb;
    --muted: #9aa3ad;
    --border: #2c333c;
    --accent: #60a5fa;
    --accent-bg: #1e2a3d;
    --ok: #4ade80;
    --ok-bg: #14301f;
    --bad: #f87171;
    --bad-bg: #3b1515;
    --star: #fbbf24;
    --mask: #6b7280;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}
h1, h2, h3 { margin: 0; font-weight: 600; }
p { margin: 0 0 8px; }
hr { border: 0; border-top: 1px solid var(--border); margin: 14px 0; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.ok { color: var(--ok); }
.bad { color: var(--bad); }

/* ---- 顶栏与错误条 */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.topbar h1 { font-size: 18px; }
.error-bar {
  background: var(--bad-bg); color: var(--bad);
  padding: 10px 16px;
  border-bottom: 1px solid var(--bad);
  white-space: pre-wrap; word-break: break-all;
}

/* ---- 布局 */
.layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) 400px;
  gap: 14px;
  padding: 14px;
  max-width: 1500px;
  margin: 0 auto;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  min-width: 0;
  box-shadow: var(--shadow);
}
.panel h2 { font-size: 15px; margin-bottom: 8px; }
.panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.panel-dictation { position: sticky; top: 62px; align-self: start; }
.panel-pages { align-self: start; }
.toolbar { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---- 按钮与表单 */
button {
  font: inherit; color: inherit;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  line-height: 1.4;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:hover { filter: brightness(1.08); }
button.big { width: 100%; padding: 10px; font-size: 16px; margin-top: 6px; }
button[aria-pressed="true"] { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-group.wrap { margin-top: 8px; }
.field { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.field-label { min-width: 3em; padding-top: 6px; color: var(--muted); font-size: 13px; }
.field > .btn-group { flex: 1; }
.field-col { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
input[type="text"], textarea, select {
  font: inherit; color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  width: 100%;
}
input[type="text"]:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.file-btn {
  display: inline-block;
  border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 12px; cursor: pointer;
}
.file-btn:hover { border-color: var(--accent); }
.hint { font-size: 13px; padding: 8px 10px; border-radius: 8px; background: var(--accent-bg); color: var(--accent); }
.hint.bad { background: var(--bad-bg); color: var(--bad); }
.hint.ok { background: var(--ok-bg); color: var(--ok); }

/* ---- 页码列表 */
.page-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.page-item {
  width: 100%; text-align: left;
  display: flex; flex-direction: column; gap: 1px;
  padding: 8px 10px;
}
.page-item.is-active { background: var(--accent-bg); border-color: var(--accent); }
.page-num { font-weight: 600; }
.page-title { font-size: 13px; }
.page-meta { font-size: 12px; color: var(--muted); }

/* ---- 单词表 */
.table-wrap { overflow-x: auto; }
.word-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.word-table th, .word-table td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  text-align: left; vertical-align: top;
}
.word-table th { color: var(--muted); font-weight: 500; font-size: 12px; white-space: nowrap; }
.col-mark { width: 34px; text-align: center !important; }
.col-idx { width: 36px; }
td.zh { font-weight: 500; }
td.fl { white-space: nowrap; }
td.pos { white-space: nowrap; }
tr.is-marked td.zh::after { content: " ★"; color: var(--star); font-size: 12px; }
tr.is-current { background: var(--accent-bg); }
tr.is-current td.zh { color: var(--accent); }
tr.is-correct td.fl { color: var(--ok); }
tr.is-wrong td.fl { color: var(--bad); font-weight: 600; }
.mark-btn { border: none; background: none; font-size: 18px; color: var(--border); padding: 0 4px; line-height: 1; }
.mark-btn:hover { color: var(--star); }
.mark-btn[aria-pressed="true"] { color: var(--star); background: none; border: none; }
.masked { color: var(--mask); letter-spacing: 2px; user-select: none; }
.alt { font-size: 12px; }
.badge-wrong {
  display: inline-block; font-size: 12px; white-space: nowrap;
  background: var(--bad-bg); color: var(--bad);
  border-radius: 999px; padding: 1px 8px;
}
@keyframes rowflash {
  0% { background: var(--bad-bg); }
  100% { background: transparent; }
}
tr.flash { animation: rowflash 1.4s ease-out; }
tr.is-current.flash { animation: none; }

/* ---- 默写卡片 */
.card-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; }
.card-zh { font-size: 32px; font-weight: 600; line-height: 1.3; word-break: break-word; }
.card-pos { min-height: 1.5em; margin-bottom: 8px; }
.answer-input { font-size: 20px; padding: 10px 12px; }
.feedback { margin-top: 10px; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.feedback.ok { background: var(--ok-bg); color: var(--ok); }
.feedback.bad { background: var(--bad-bg); color: var(--bad); }
.feedback .fb-title { font-weight: 600; margin-bottom: 2px; }
.feedback .fb-answer { font-size: 18px; }
.feedback .fb-hint { margin-top: 4px; font-size: 13px; opacity: 0.85; }
.feedback s { opacity: 0.8; }
.card-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }

/* ---- 结算 */
.summary-stats { display: flex; gap: 10px; margin-bottom: 12px; }
.stat { flex: 1; text-align: center; padding: 8px; border: 1px solid var(--border); border-radius: 8px; }
.stat-num { font-size: 26px; font-weight: 600; }
.stat-label { font-size: 12px; color: var(--muted); }
.small-title { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.wrong-list { margin: 0; padding-left: 18px; max-height: 40vh; overflow: auto; }
.wrong-list li { margin-bottom: 4px; }

/* ---- 设置抽屉 */
.backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.35); z-index: 9; }
.drawer {
  position: fixed; top: 0; right: 0; height: 100%;
  width: min(420px, 100%);
  background: var(--panel);
  border-left: 1px solid var(--border);
  padding: 16px;
  overflow: auto;
  z-index: 10;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
}
.drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }

/* ---- 窄屏：上下堆叠，默写面板在单词表上方 */
@media (max-width: 1100px) {
  .layout { grid-template-columns: 230px minmax(0, 1fr); }
  .panel-dictation { grid-column: 1 / -1; position: static; order: 1; }
  .panel-pages { order: 0; }
  .panel-words { order: 2; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; padding: 10px; gap: 10px; }
  .page-list { flex-direction: row; flex-wrap: wrap; }
  .page-item { width: auto; }
  .card-zh { font-size: 26px; }
  .word-table { font-size: 13px; }
  .word-table th, .word-table td { padding: 5px 6px; }
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; line-height: 1.5; resize: vertical; }