/* ==========================================================================
   逻辑填空词语积累 — 苹果风 / 极简扁平 / 色彩克制
   视觉语言对齐 zzll：同一套变量、圆角、阴影与三主题
   ========================================================================== */

:root {
  --bg: #f5f5f7;
  --bg-elevated: #ffffff;
  --card: #ffffff;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #8e8e93;
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.14);

  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.10);
  --green: #34c759;
  --green-soft: rgba(52, 199, 89, 0.12);
  --red: #ff3b30;
  --red-soft: rgba(255, 59, 48, 0.12);
  --orange: #ff9f0a;
  --orange-soft: rgba(255, 159, 10, 0.14);
  --purple: #af52de;
  --purple-soft: rgba(175, 82, 222, 0.12);

  --radius: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04), 0 6px 20px rgba(0, 0, 0, 0.05);
  --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.06), 0 14px 40px rgba(0, 0, 0, 0.09);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

html[data-theme="dark"] {
  --bg: #242428;
  --bg-elevated: #2f2f34;
  --card: #2f2f34;
  --text: #e8e8ed;
  --text-2: #a6a6af;
  --text-3: #85858e;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.17);
  --accent: #0a84ff;
  --accent-soft: rgba(10, 132, 255, 0.18);
  --green: #30d158;
  --green-soft: rgba(48, 209, 88, 0.16);
  --red: #ff453a;
  --red-soft: rgba(255, 69, 58, 0.16);
  --orange: #ffd60a;
  --orange-soft: rgba(255, 214, 10, 0.16);
  --purple: #bf5af2;
  --purple-soft: rgba(191, 90, 242, 0.18);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.24), 0 6px 20px rgba(0, 0, 0, 0.20);
  --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.30), 0 14px 40px rgba(0, 0, 0, 0.34);
  color-scheme: dark;
}

html[data-theme="eye"] {
  --bg: #dfe9da;
  --bg-elevated: #f0f6eb;
  --card: #f0f6eb;
  --text: #22261f;
  --text-2: #5c6357;
  --text-3: #737b6b;
  --line: rgba(0, 0, 0, 0.10);
  --line-strong: rgba(0, 0, 0, 0.17);
  --accent: #0060c0;
  --accent-soft: rgba(0, 96, 192, 0.12);
  --green: #2c9c4a;
  --green-soft: rgba(44, 156, 74, 0.14);
  --red: #d63a2f;
  --red-soft: rgba(214, 58, 47, 0.12);
  --orange: #b8730a;
  --orange-soft: rgba(184, 115, 10, 0.14);
  --purple: #7b3fa8;
  --purple-soft: rgba(123, 63, 168, 0.12);
  --shadow-1: 0 1px 2px rgba(28, 44, 30, 0.07), 0 6px 20px rgba(28, 44, 30, 0.09);
  --shadow-2: 0 2px 6px rgba(28, 44, 30, 0.10), 0 14px 40px rgba(28, 44, 30, 0.15);
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 780px;
  margin: 0 auto;
  background: var(--bg);
}

/* ---------------------------------------------------------------- 顶栏 */
.topbar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px 10px;
}

.brand-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.brand-sub {
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-3);
}

.tools { display: flex; align-items: center; gap: 8px; }

.bank-switch { position: relative; }

.bank-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-1);
}

.bank-caret { width: 14px; height: 14px; color: var(--text-3); }

.bank-menu {
  position: absolute;
  top: 42px;
  right: 0;
  z-index: 40;
  width: 236px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-2);
}

.bank-item {
  display: block;
  width: 100%;
  padding: 9px 11px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  text-align: left;
  color: var(--text);
}

.bank-item:hover { background: var(--accent-soft); }
.bank-item.is-on { background: var(--accent-soft); }

.bank-item-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
}

.bank-item-meta {
  margin-top: 3px;
  font-size: 11px;
  color: var(--text-3);
}

.bank-check { width: 15px; height: 15px; color: var(--accent); }

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-2);
  box-shadow: var(--shadow-1);
}

.icon-btn svg { width: 17px; height: 17px; }
.icon-btn:active { transform: scale(0.94); }

/* ---------------------------------------------------------------- 视图 */
.views {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 18px 28px;
  -webkit-overflow-scrolling: touch;
}

.view { display: none; }
.view.is-active { display: block; }

/* ---------------------------------------------------------------- 搜索 */
.searchbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  margin: 4px 0 14px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-1);
}

.searchbar svg { flex: none; width: 16px; height: 16px; color: var(--text-3); }

.searchbar input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
}

.searchbar input::placeholder { color: var(--text-3); }

.search-clear {
  flex: none;
  width: 20px;
  height: 20px;
  border: 0;
  border-radius: 50%;
  background: var(--line);
  color: var(--text-2);
  font-size: 14px;
  line-height: 1;
}

/* ---------------------------------------------------------------- 区块标题 */
.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 18px 2px 10px;
}

.sec-title { font-size: 15px; font-weight: 600; }
.sec-note { font-size: 12px; color: var(--text-3); }

/* ---------------------------------------------------------------- 组列表 */
.group-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin-bottom: 8px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  text-align: left;
  box-shadow: var(--shadow-1);
}

.group-item:active { transform: scale(0.995); }

.group-no {
  flex: none;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.group-main { flex: 1; min-width: 0; }

.group-name {
  display: block;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.group-meta {
  display: block;
  margin-top: 3px;
  font-size: 11.5px;
  color: var(--text-3);
}

.group-chev { flex: none; color: var(--text-3); font-size: 18px; }

.chapter-head {
  margin: 20px 2px 9px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.3px;
}

/* ---------------------------------------------------------------- 词卡 */
.word-card {
  margin-bottom: 10px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow-1);
}

.word-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.word-h {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.tone {
  padding: 1px 7px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.7;
}

.tone-bao { background: var(--green-soft); color: var(--green); }
.tone-bian { background: var(--red-soft); color: var(--red); }
.tone-mid { background: var(--line); color: var(--text-2); }

.word-gloss {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.word-card.is-slim {
  padding: 11px 14px;
  margin-bottom: 7px;
}

.word-card.is-slim .word-h { font-size: 16.5px; }

.word-card.is-slim .word-gloss {
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-2);
}

.wblock { margin-top: 10px; }

.wlabel {
  display: inline-block;
  margin-bottom: 3px;
  padding: 0 6px;
  border-radius: 5px;
  background: var(--line);
  color: var(--text-2);
  font-size: 10.5px;
  line-height: 1.7;
}

.wtext {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-2);
}

.wtext em {
  font-style: normal;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0 2px;
  border-radius: 3px;
}

.wreal {
  margin-top: 6px;
  padding: 9px 11px;
  border-left: 2px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--accent-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
}

.sub-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 2px 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
}

.sub-head::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ---------------------------------------------------------------- 返回条 */
.backbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 2px 0 12px;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 32px;
  padding: 0 12px 0 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-2);
  font-size: 13px;
  box-shadow: var(--shadow-1);
}

.back-btn svg { width: 15px; height: 15px; }

/* ---------------------------------------------------------------- 练习入口 */
.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 4px;
}

.mode-card {
  position: relative;
  padding: 15px 14px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  text-align: left;
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.mode-card:active { transform: scale(0.985); }

.mode-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 9px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
}

.mode-icon svg { width: 17px; height: 17px; }
.mode-card.m-green .mode-icon { background: var(--green-soft); color: var(--green); }
.mode-card.m-orange .mode-icon { background: var(--orange-soft); color: var(--orange); }
.mode-card.m-purple .mode-icon { background: var(--purple-soft); color: var(--purple); }

.mode-name {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
}

.mode-desc {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--text-3);
}

.mode-card.is-off { opacity: 0.45; }

.mode-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--orange-soft);
  color: var(--orange);
  font-size: 10px;
  font-weight: 500;
}

/* ---------------------------------------------------------------- 今日任务 */
.today-card {
  margin: 4px 0 6px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-1);
}

.today-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.today-title { font-size: 15px; font-weight: 600; }
.today-count { font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums; }

.progress {
  height: 6px;
  margin: 11px 0 12px;
  border-radius: 99px;
  background: var(--line);
  overflow: hidden;
}

.progress > i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--accent);
  transition: width 0.35s ease;
}

/* ---------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 500;
}

.btn-primary {
  border-color: transparent;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(0, 113, 227, 0.24);
}

.btn-soft { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.btn-block { width: 100%; }
.btn:active { transform: scale(0.98); }
.btn[disabled] { opacity: 0.45; pointer-events: none; }

/* ---------------------------------------------------------------- 浮层练习 */
.sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.sheet[hidden] { display: none; }

.sheet-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
  padding: 0 18px;
}

.quiz-top {
  flex: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0 10px;
}

.quiz-close {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-2);
  font-size: 17px;
  line-height: 1;
}

.quiz-meter {
  flex: 1;
  height: 6px;
  border-radius: 99px;
  background: var(--line);
  overflow: hidden;
}

.quiz-meter > i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.quiz-step {
  font-size: 12px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.quiz-body {
  flex: 1;
  overflow-y: auto;
  padding-bottom: 18px;
}

.quiz-foot { flex: none; padding: 10px 0 22px; }

.q-kicker {
  margin: 6px 0 8px;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 0.2px;
}

.q-prompt {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  font-size: 15px;
  line-height: 1.8;
  box-shadow: var(--shadow-1);
}

.q-prompt .blank {
  display: inline-block;
  min-width: 62px;
  border-bottom: 2px solid var(--accent);
  color: transparent;
}

.q-blank {
  display: inline-block;
  width: 56px;
  height: 1.05em;
  margin: 0 3px;
  border-bottom: 2px solid var(--accent);
  vertical-align: -2px;
  border-radius: 1px;
  background: var(--accent-soft);
}

.opt-list { margin-top: 14px; display: grid; gap: 9px; }

.opt {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  color: var(--text);
  font-size: 15px;
  text-align: left;
  line-height: 1.5;
  box-shadow: var(--shadow-1);
}

.opt-key {
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: var(--line);
  color: var(--text-2);
  font-size: 11.5px;
  font-weight: 600;
}

.opt.is-right {
  border-color: var(--green);
  background: var(--green-soft);
}

.opt.is-right .opt-key { background: var(--green); color: #fff; }

.opt.is-wrong {
  border-color: var(--red);
  background: var(--red-soft);
}

.opt.is-wrong .opt-key { background: var(--red); color: #fff; }
.opt[disabled] { cursor: default; }

.feedback {
  margin-top: 13px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-2);
}

.feedback b { color: var(--text); font-weight: 600; }
.feedback .fb-word { color: var(--accent); }

/* ---------------------------------------------------------------- 连连看 */
.match-board {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 9px;
  margin-top: 12px;
}

.match-col { display: grid; gap: 9px; align-content: start; }

.match-cell {
  min-height: 52px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  text-align: left;
  box-shadow: var(--shadow-1);
  transition: opacity 0.2s, transform 0.15s;
}

.match-cell.side-r {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.6;
}

.match-cell.is-pick {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.match-cell.is-done {
  opacity: 0.35;
  border-color: transparent;
  background: var(--line);
  color: var(--text-3);
  pointer-events: none;
}

.match-cell.is-bad {
  border-color: var(--red);
  background: var(--red-soft);
  animation: shake 0.32s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.match-tip {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--text-3);
  text-align: center;
}

/* ---------------------------------------------------------------- 结算 */
.result-wrap { padding: 22px 0; text-align: center; }

.result-ring {
  display: grid;
  place-items: center;
  width: 108px;
  height: 108px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 30px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.result-title { font-size: 17px; font-weight: 600; }
.result-sub { margin-top: 6px; font-size: 13px; color: var(--text-3); }

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.stat-box {
  padding: 12px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
}

.stat-num {
  font-size: 19px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.stat-label { margin-top: 2px; font-size: 11px; color: var(--text-3); }

/* ---------------------------------------------------------------- 错词本 / 我的 */
.row-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow-1);
}

.row-main { flex: 1; min-width: 0; }
.row-title { font-size: 15px; font-weight: 500; }
.row-sub { margin-top: 3px; font-size: 11.5px; color: var(--text-3); }

.badge {
  flex: none;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--red-soft);
  color: var(--red);
  font-size: 11px;
  font-weight: 500;
}

.badge-soft { background: var(--line); color: var(--text-2); }

.empty-state { padding: 46px 20px; text-align: center; }
.empty-title { font-size: 15px; font-weight: 500; color: var(--text-2); }
.empty-desc { margin-top: 6px; font-size: 12.5px; line-height: 1.7; color: var(--text-3); }

.me-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 4px;
}

.me-stat {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow-1);
}

.me-num {
  font-size: 24px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}

.me-label { margin-top: 2px; font-size: 11.5px; color: var(--text-3); }

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 15px;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  text-align: left;
}

.setting-val { color: var(--text-3); font-size: 12.5px; }

/* ---------------------------------------------------------------- 底部页签 */
.tabbar {
  flex: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: var(--bg-elevated);
}

.tab {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 3px;
  padding: 7px 0 5px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--text-3);
  font-size: 10.5px;
}

.tab svg { width: 21px; height: 21px; }
.tab.is-active { color: var(--accent); }

.tab-dot {
  position: absolute;
  top: 6px;
  right: calc(50% - 18px);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red);
}

/* ---------------------------------------------------------------- 窄屏 */
@media (max-width: 420px) {
  .topbar { padding: 12px 14px 8px; }
  .views { padding: 0 14px 16px; }
  .brand-title { font-size: 19px; }
  .mode-grid { gap: 8px; }
  .mode-card { padding: 13px 12px; }
  .match-board { gap: 7px; }
  .match-cell { min-height: 48px; padding: 9px 10px; }
  .match-cell.side-r { font-size: 12px; }
}

@media (min-width: 560px) {
  .mode-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   动效层
   手感对齐 zzll：位移不超过 8px、时长 0.18~0.32s、回弹用 cubic-bezier(.34,1.56,.64,1)
   ========================================================================== */

/* ---------- 主题切换：以点击位置为圆心扩散（View Transitions） ---------- */
::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 2; }

/* ---------- 启动遮罩 ---------- */
.boot {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: var(--bg);
  transition: opacity 0.3s ease, visibility 0.3s;
}

.boot.is-done { opacity: 0; visibility: hidden; }
.boot[hidden] { display: none; }

.boot-spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2.5px solid var(--line-strong);
  border-top-color: var(--accent);
  border-right-color: var(--accent);
  animation: boot-spin 0.8s linear infinite;
}

@keyframes boot-spin { to { transform: rotate(360deg); } }

.boot-name {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

/* ---------- 视图切换 ---------- */
.view.is-active {
  display: block;
  animation: fade-in 0.28s ease both;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 列表逐项入场（--d 由 JS 按序号给出） ---------- */
.group-item,
.word-card,
.row-card {
  animation: item-in 0.3s ease both;
  animation-delay: var(--d, 0s);
}

@keyframes item-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 题库下拉 ---------- */
.bank-menu:not([hidden]) {
  animation: menu-in 0.18s ease both;
  transform-origin: top right;
}

@keyframes menu-in {
  from { opacity: 0; transform: translateY(-6px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

/* ---------- 练习浮层：淡入 + 面板轻微上浮 ---------- */
.sheet:not([hidden]) {
  animation: sheet-fade 0.22s ease both;
}

.sheet:not([hidden]) .sheet-panel {
  animation: sheet-rise 0.32s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.sheet.is-out { animation: sheet-fade 0.18s ease reverse both; }
.sheet.is-out .sheet-panel { animation: sheet-down 0.18s ease both; }

@keyframes sheet-fade {
  from { opacity: 0; } to { opacity: 1; }
}

@keyframes sheet-rise {
  from { opacity: 0; transform: translateY(16px) scale(0.99); }
  to { opacity: 1; transform: none; }
}

@keyframes sheet-down {
  from { opacity: 1; transform: none; }
  to { opacity: 0; transform: translateY(10px); }
}

/* ---------- 题目内容入场 ---------- */
.q-kicker, .q-prompt {
  animation: read-in 0.3s ease both;
}

.q-prompt { animation-delay: 0.03s; }

@keyframes read-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.opt {
  animation: opt-in 0.26s ease both;
  animation-delay: var(--d, 0s);
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.12s ease;
}

@keyframes opt-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.opt:not([disabled]):active { transform: scale(0.975); }

.opt.is-right { animation: opt-right 0.42s cubic-bezier(0.34, 1.56, 0.64, 1); }
.opt.is-wrong { animation: shake 0.34s ease; }

@keyframes opt-right {
  0% { transform: scale(1); }
  45% { transform: scale(1.028); }
  100% { transform: scale(1); }
}

/* ---------- 反馈条 ---------- */
.feedback,
.wreal.is-in {
  animation: read-in 0.3s ease both;
}

/* ---------- 连连看 ---------- */
.match-cell {
  transition: opacity 0.3s ease, transform 0.22s ease,
    background-color 0.18s ease, border-color 0.18s ease;
  animation: opt-in 0.26s ease both;
  animation-delay: var(--d, 0s);
}

.match-cell:active { transform: scale(0.97); }

.match-cell.is-hit { animation: cell-hit 0.32s ease; }

@keyframes cell-hit {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0.5); }
  40% { transform: scale(0.955); box-shadow: 0 0 0 7px rgba(52, 199, 89, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0); }
}

/* ---------- 结算 ---------- */
.result-ring {
  animation: ring-pop 0.52s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes ring-pop {
  from { opacity: 0; transform: scale(0.72); }
  to { opacity: 1; transform: scale(1); }
}

.result-title, .result-sub {
  animation: read-in 0.34s ease both;
  animation-delay: 0.08s;
}

.result-sub { animation-delay: 0.12s; }

.result-stats .stat-box {
  animation: item-in 0.34s ease both;
  animation-delay: var(--d, 0.14s);
}

.result-wrap .btn {
  animation: read-in 0.34s ease both;
  animation-delay: 0.22s;
}

/* ---------- 统计数字轻微弹一下 ---------- */
.stat-num, .me-num {
  transition: color 0.2s ease;
}

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 88px;
  z-index: 99;
  transform: translateX(-50%);
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.82);
  color: #fff;
  font-size: 13px;
  animation: toast-in 0.26s ease both;
  pointer-events: none;
}

@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.toast.is-out { animation: toast-in 0.2s ease reverse both; }

/* ---------- 彩带画布 ---------- */
.confetti {
  position: fixed;
  inset: 0;
  z-index: 120;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.confetti[hidden] { display: none; }

/* ---------- 按压反馈 ---------- */
.tab:active { transform: scale(0.94); }
.tab { transition: transform 0.12s ease, color 0.18s ease; }
.bank-item { transition: background 0.16s ease, transform 0.12s ease; }
.bank-item:active { transform: scale(0.985); }
.icon-btn, .bank-btn, .btn, .mode-card, .group-item, .quiz-close, .back-btn {
  transition: transform 0.12s ease, background 0.16s ease, border-color 0.16s ease;
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 细节反馈 ---------- */
.searchbar {
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.searchbar:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* 页签切换时图标轻微回弹 */
.tab.is-active svg {
  animation: tab-pop 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes tab-pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.14); }
  100% { transform: scale(1); }
}

/* 空状态 */
.empty-state { animation: fade-in 0.32s ease both; }

/* 进度条走位更顺 */
.progress > i {
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 题库切换后标签轻微弹一下，提示"换库了" */
.bank-btn-label {
  display: inline-block;
}

.bank-btn-label.is-bump {
  animation: tab-pop 0.3s ease;
}

/* 错词移除时的退场 */
.row-card {
  transition: opacity 0.19s ease, transform 0.19s ease;
}

.row-card.is-removing {
  opacity: 0;
  transform: translateX(14px);
}