/* 单词记忆 · 清爽卡通游戏风（对齐语文闯关岛） */

:root {
  --ink: #1C2B36;
  --muted: #5E7383;
  --line: rgba(28, 43, 54, .08);
  --surface: #FFFFFF;
  --deep: #1F5C6B;
  --deep-2: #2A7A8C;
  --gold: #E2A63A;
  --gold-soft: #FFF4DD;
  --ok: #3B9B6E;
  --bad: #D45B4A;
  --soft: #F3F7F9;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
}

* { box-sizing: border-box; }
button, input { font-family: inherit; }

body {
  margin: 0;
  background: #6FA3B8;
  font-family: var(--font);
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}

.vb-app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  height: 100dvh;
  background:
    radial-gradient(ellipse 90% 50% at 80% -10%, rgba(255,255,255,.45), transparent 55%),
    linear-gradient(165deg, #9BC8DC 0%, #A8D0C4 42%, #B7D6B0 100%);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.vb-screen {
  display: none !important;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}
.vb-screen.on { display: flex !important; }

/* HUD */
.vb-hud {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px 10px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
  background: rgba(255,255,255,.55);
  border-bottom: 1px solid rgba(255,255,255,.35);
  backdrop-filter: blur(12px);
  flex-shrink: 0;
}
.vb-hud.compact {
  background: rgba(255,255,255,.82);
  border-bottom: 1px solid var(--line);
}
.vb-avatar {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, #B8E4F0, #7EB8D4);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(42, 122, 140, .22);
}
.vb-hud-mid { flex: 1; min-width: 0; }
.vb-title-row {
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: .02em;
}
.vb-edition {
  font-size: 11px;
  color: var(--muted);
  font-weight: 600;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vb-res { display: flex; gap: 6px; flex-shrink: 0; }
.vb-coin {
  display: flex; align-items: center; gap: 3px;
  background: rgba(255,255,255,.85);
  border-radius: 999px;
  padding: 4px 8px 4px 6px;
  box-shadow: 0 2px 8px rgba(28, 43, 54, .06);
}
.vb-coin span { font-size: 12px; }
.vb-coin b { color: var(--ink); font-size: 12px; font-weight: 800; }
.vb-coin.fire { background: #FFF0EC; }
.vb-coin.overall b {
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.vb-overall {
  background: #FFFFFF;
  border-radius: 16px;
  padding: 14px 14px 12px;
  margin-bottom: 10px;
  box-shadow: 0 8px 22px rgba(28, 43, 54, .1);
}
.vb-overall-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.vb-overall-top span {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .04em;
}
.vb-overall-top strong {
  font-size: 22px;
  font-weight: 800;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.vb-overall-bar {
  height: 10px;
  border-radius: 999px;
  background: #E8F1F4;
  overflow: hidden;
}
.vb-overall-bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #1F5C6B, #3FA7B8);
  transition: width .35s ease;
}
.vb-overall-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
}

.vb-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 14px 24px;
  padding-bottom: calc(24px + var(--safe-b));
  scrollbar-width: none;
}
.vb-body::-webkit-scrollbar { width: 0; height: 0; }

/* Quest / start */
.vb-quest {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #1F5C6B 0%, #2A7A8C 100%);
  border-radius: 18px;
  padding: 14px 14px 14px 16px;
  box-shadow: 0 10px 24px rgba(31, 92, 107, .28);
  margin-bottom: 10px;
  color: #fff;
}
.vb-quest-copy { flex: 1; min-width: 0; }
.vb-quest-copy em {
  display: block;
  font-style: normal;
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,.7);
  letter-spacing: .08em;
}
.vb-quest-copy strong {
  display: block;
  font-size: 18px;
  font-weight: 800;
  margin: 3px 0 4px;
}
.vb-quest-copy .vb-status {
  font-size: 12px;
  font-weight: 700;
  color: rgba(255,255,255,.85);
}
.vb-play {
  width: 56px; height: 56px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  color: var(--deep);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0,0,0,.12);
  flex-shrink: 0;
}
.vb-play:active { transform: scale(.96); }
.vb-play:disabled { opacity: .45; cursor: not-allowed; }

/* Dock */
.vb-quest-tip {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,.72);
  letter-spacing: .02em;
}
.vb-dock-2 {
  grid-template-columns: 1fr 1fr;
}
.vb-card-note {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(28,43,54,.12);
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  line-height: 1.4;
}
.vb-details {
  background: #FFFFFF;
  border-radius: 16px;
  padding: 4px 12px 12px;
  margin-bottom: 10px;
  box-shadow: 0 8px 22px rgba(28, 43, 54, .1);
  overflow: hidden;
}
.vb-details > summary {
  list-style: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
  color: var(--deep);
  padding: 12px 0;
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.vb-details > summary::-webkit-details-marker { display: none; }
.vb-details > summary::after {
  content: '展开';
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
}
.vb-details[open] > summary::after { content: '收起'; }
.vb-details .vb-modes { margin-top: 4px; }

.vb-dock {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.vb-dock-btn {
  border: 0;
  background: #FFFFFF;
  border-radius: 14px;
  padding: 10px 6px 8px;
  cursor: pointer;
  color: var(--ink);
  box-shadow: 0 6px 16px rgba(28, 43, 54, .08);
}
.vb-dock-btn i { display: block; font-style: normal; font-size: 18px; line-height: 1; }
.vb-dock-btn b { display: block; font-size: 12px; color: var(--deep); font-weight: 800; margin-top: 2px; }
.vb-dock-btn span { font-size: 11px; font-weight: 600; color: var(--muted); }
.vb-dock-btn:active { background: #F3F7F9; }
.vb-dock-btn.active {
  background: linear-gradient(135deg, #E8F5F8, #D8EEF2);
  box-shadow: 0 4px 12px rgba(42, 122, 140, .18);
}

/* Cards / panels */
.vb-card {
  background: #FFFFFF;
  border-radius: 16px;
  padding: 12px 12px 14px;
  margin-bottom: 10px;
  box-shadow: 0 8px 22px rgba(28, 43, 54, .1);
}
.vb-card-title {
  font-size: 12px;
  font-weight: 800;
  color: var(--deep);
  margin: 0 0 10px;
  letter-spacing: .04em;
}

.vb-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}
.vb-stat {
  background: #FFFFFF;
  border-radius: 14px;
  padding: 10px 4px 8px;
  text-align: center;
  box-shadow: 0 6px 16px rgba(28, 43, 54, .08);
}
.vb-stat .n {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--deep);
}
.vb-stat .l {
  display: block;
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 2px;
}

.vb-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: .06em;
}
.vb-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  position: relative;
  z-index: 1;
}
.vb-chip {
  border: 1px solid #E6EEF2;
  background: #F7FAFC;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  max-width: 100%;
  white-space: normal;
  text-align: left;
  line-height: 1.35;
  word-break: break-word;
}
.vb-chip.active {
  background: linear-gradient(135deg, #1F5C6B, #2A7A8C);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(31, 92, 107, .25);
}
.vb-chip:active { transform: scale(.97); }

.vb-modes {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}
.vb-mode {
  border: 1px solid #E6EEF2;
  background: #FFFFFF;
  border-radius: 14px;
  padding: 10px 4px 8px;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 4px 12px rgba(28, 43, 54, .06);
  color: var(--ink);
}
.vb-mode .i { display: block; font-size: 18px; line-height: 1; }
.vb-mode .n { display: block; font-size: 11px; font-weight: 800; margin-top: 4px; }
.vb-mode .d { display: block; font-size: 9px; color: var(--muted); font-weight: 600; margin-top: 2px; }
.vb-mode.active {
  background: linear-gradient(135deg, #F6D28A, #E2A63A);
  border-color: transparent;
  box-shadow: 0 6px 14px rgba(226, 166, 58, .28);
}
.vb-mode.active .d { color: #7A5200; }

.vb-rules {
  font-size: 12px;
  color: rgba(28, 43, 54, .72);
  line-height: 1.65;
  padding: 10px 12px;
  background: rgba(255,255,255,.45);
  border-radius: 12px;
  font-weight: 500;
  margin: 4px 0 10px;
}
.vb-rules b { color: var(--deep); }
.vb-rules ul { margin: 6px 0 0; padding-left: 1.1em; }
.vb-rules li { margin: 2px 0; }
.vb-rules .cur {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed rgba(28,43,54,.15);
  color: var(--deep);
  font-weight: 700;
}

.vb-tip {
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #FFF0EC;
  color: #A84A3C;
  font-size: 12px;
  font-weight: 600;
}
.vb-tip.hidden { display: none; }

.vb-review {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.7);
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 10px;
}
.vb-review-copy { flex: 1; min-width: 0; }
.vb-review-copy strong { display: block; font-size: 14px; font-weight: 800; }
.vb-review-copy span { font-size: 12px; color: var(--muted); font-weight: 600; }

.vb-back {
  border: 0;
  background: rgba(255,255,255,.55);
  color: var(--deep);
  font-weight: 700;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.vb-back:active { background: rgba(255,255,255,.8); }
.vb-back.block { width: 100%; text-align: center; margin-top: 4px; }

.vb-btn {
  border: 0;
  background: var(--deep);
  color: #fff;
  font-weight: 700;
  border-radius: 12px;
  padding: 13px 12px;
  cursor: pointer;
  font-size: 15px;
}
.vb-btn.ghost {
  background: var(--surface);
  color: var(--deep);
  border: 1px solid var(--line);
}
.vb-btn.gold {
  background: linear-gradient(135deg, #F6D28A, #E2A63A);
  color: #5C3D00;
}
.vb-btn:active { opacity: .92; }
.vb-btn:disabled { opacity: .4; cursor: not-allowed; }
.vb-btn.sm { padding: 10px 12px; font-size: 13px; border-radius: 10px; }

.vb-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.vb-row > .vb-btn { flex: 1; }

/* Study / quiz */
.vb-quiz-top {
  flex-shrink: 0;
  padding: 12px 14px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid var(--line);
}
.vb-quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}
.vb-quiz-meta .title {
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
  flex: 1;
  text-align: center;
}
.vb-progress {
  height: 6px;
  background: rgba(31, 92, 107, .12);
  border-radius: 99px;
  margin-top: 12px;
  overflow: hidden;
}
.vb-progress > i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #2A7A8C, #3B9B6E);
  width: 0;
  transition: width .25s ease;
  border-radius: 99px;
}

.vb-study-card {
  background: #FFFFFF;
  border-radius: 18px;
  padding: 28px 20px 22px;
  margin: 14px 14px 12px;
  text-align: center;
  box-shadow: 0 10px 28px rgba(28, 43, 54, .12);
}
.vb-idx {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 14px;
}
.vb-word {
  font-size: 36px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: .02em;
  word-break: break-word;
}
.vb-phonetic {
  font-size: 15px;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 14px;
}
.vb-meaning {
  font-size: 18px;
  font-weight: 700;
  color: var(--deep-2);
  margin-bottom: 16px;
  min-height: 27px;
}
.vb-hint {
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 12px;
}
.vb-sound {
  width: 52px; height: 52px;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, #1F5C6B, #2A7A8C);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(31, 92, 107, .3);
}
.vb-sound.speaking { animation: vb-pulse .5s ease-in-out infinite; }
@keyframes vb-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}
.vb-example-btn {
  margin-top: 12px;
  border: 0;
  background: var(--soft);
  color: var(--deep);
  font-weight: 700;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
}
.vb-example {
  display: none;
  margin-top: 12px;
  padding: 12px;
  background: #F7FAFC;
  border-radius: 12px;
  text-align: left;
  font-size: 14px;
  line-height: 1.5;
}
.vb-example.show { display: block; }
.vb-example-cn {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.vb-opts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 14px 12px;
}
.vb-opt {
  padding: 14px 16px;
  background: #FFFFFF;
  border: 1.5px solid #E6EEF2;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  box-shadow: 0 4px 12px rgba(28, 43, 54, .05);
}
.vb-opt.disabled { pointer-events: none; }
.vb-opt.correct {
  background: #EAF7F0;
  border-color: #C9E8D6;
  color: var(--ok);
}
.vb-opt.wrong {
  background: #FFF0EC;
  border-color: #F5C4BC;
  color: var(--bad);
}

.vb-input {
  display: block;
  width: calc(100% - 28px);
  margin: 0 14px 12px;
  padding: 14px 16px;
  border: 1.5px solid #E6EEF2;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .04em;
  background: #fff;
  color: var(--ink);
  outline: none;
}
.vb-input:focus { border-color: var(--deep-2); box-shadow: 0 0 0 3px rgba(42,122,140,.15); }
.vb-input.correct { border-color: var(--ok); background: #EAF7F0; }
.vb-input.wrong { border-color: var(--bad); background: #FFF0EC; }

.vb-controls {
  display: flex;
  gap: 8px;
  padding: 0 14px 16px;
}
.vb-controls .vb-btn { flex: 1; }

/* Result */
.vb-result {
  text-align: center;
  padding: 28px 16px 16px;
}
.vb-trophy { font-size: 48px; margin-bottom: 8px; }
.vb-result .big {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 6px;
}
.vb-result .score {
  font-size: 32px;
  font-weight: 800;
  color: var(--deep);
  margin: 10px 0;
}
.vb-result p {
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

.vb-badge-pass {
  display: inline-block;
  background: #EAF7F0;
  color: var(--ok);
  font-weight: 800;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.vb-badge-fail {
  display: inline-block;
  background: #FFF0EC;
  color: var(--bad);
  font-weight: 800;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}

/* Grading / lists */
.vb-grading-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.vb-grading-header .t { font-weight: 800; flex: 1; }
.vb-grading-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
}
.vb-grading-stats .ok { color: var(--ok); }
.vb-grading-stats .bad { color: var(--bad); }
.vb-grading-list { display: flex; flex-direction: column; gap: 8px; }
.vb-grade-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: #F7FAFC;
  border-radius: 12px;
  font-size: 13px;
}
.vb-grade-item.wrong { background: #FFF0EC; }
.vb-grade-item .w { font-weight: 800; flex: 1; }
.vb-grade-play {
  border: 0;
  background: rgba(42,122,140,.12);
  border-radius: 8px;
  width: 32px; height: 32px;
  cursor: pointer;
}

.vb-mistake-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: #FFFFFF;
  border-radius: 14px;
  margin-bottom: 8px;
  box-shadow: 0 4px 12px rgba(28,43,54,.06);
}
.vb-mistake-item .w { font-weight: 800; font-size: 16px; }
.vb-mistake-item .m { font-size: 12px; color: var(--muted); font-weight: 600; }
.vb-mistake-item .c {
  margin-left: auto;
  background: #FFF0EC;
  color: var(--bad);
  font-size: 11px;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: 999px;
}

.vb-path-hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 10px;
}
.vb-path-step {
  font-size: 11px;
  font-weight: 800;
  color: var(--muted);
  background: #F1F4F7;
  padding: 4px 8px;
  border-radius: 999px;
}
.vb-path-step.on {
  background: linear-gradient(135deg, #F6D28A, #E2A63A);
  color: #5C3D00;
}
.vb-path-step.done {
  background: #EAF7F0;
  color: var(--ok);
}
.vb-path-sep {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}
.vb-study-count {
  min-width: 44px;
  text-align: right;
  font-size: 12px;
  font-weight: 800;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
}
.vb-feedback {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 800;
}
.vb-feedback.ok {
  background: #EAF7F0;
  color: var(--ok);
}
.vb-feedback.bad {
  background: #FFF0EC;
  color: var(--bad);
}
.vb-mastery-detail {
  text-align: left;
  margin: 12px auto 0;
  max-width: 360px;
}
.vb-mastery-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: #FFF0EC;
  border-radius: 10px;
  margin-bottom: 6px;
  font-size: 13px;
}
.vb-mastery-row.ok { background: #EAF7F0; }
.vb-mastery-row b { flex: 0 0 auto; min-width: 72px; }
.vb-mastery-row span { flex: 1; color: var(--muted); font-weight: 700; font-size: 12px; }
.vb-mastery-row em { font-style: normal; font-weight: 800; color: var(--deep); font-size: 12px; }
.pos-tag, .form-tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  background: var(--soft);
  padding: 2px 6px;
  border-radius: 6px;
}
.vb-unit-prog .row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
  gap: 8px;
}
.vb-unit-prog .name {
  max-width: 70%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.vb-unit-prog .bar {
  height: 6px;
  background: rgba(31,92,107,.12);
  border-radius: 99px;
  overflow: hidden;
}
.vb-unit-prog .bar > i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #2A7A8C, #3B9B6E);
  border-radius: 99px;
}

.vb-add-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.vb-add-row .vb-input {
  width: auto;
  flex: 1;
  margin: 0;
  font-size: 15px;
  padding: 10px 14px;
}

@media (max-width: 380px) {
  .vb-modes { grid-template-columns: repeat(3, 1fr); }
  .vb-word { font-size: 30px; }
  .vb-stats { grid-template-columns: repeat(2, 1fr); }
}