:root {
  --bg: #fff8e7;
  --card: #ffffff;
  --primary: #ff6b35;
  --primary-dark: #e85a28;
  --secondary: #4ecdc4;
  --success: #2ecc71;
  --error: #e74c3c;
  --text: #2d3436;
  --text-muted: #636e72;
  --shadow: 0 8px 24px rgba(45, 52, 54, 0.12);
  --radius: 20px;
  --font: SimSun, '宋体', STSong, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  height: 100%;
}

body,
button,
input,
select,
textarea {
  font-family: var(--font);
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(160deg, #fff8e7 0%, #ffeaa7 40%, #dfe6e9 100%);
  color: var(--text);
  line-height: 1.5;
}

#confetti-root {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: var(--card);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-mascot {
  font-size: 2rem;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  color: var(--primary);
}

.site-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.top-nav {
  display: flex;
  gap: 0.5rem;
}

.nav-btn {
  font-family: var(--font);
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border: 2px solid #dfe6e9;
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.nav-btn:hover,
.nav-btn.active {
  background: var(--secondary);
  border-color: var(--secondary);
  transform: scale(1.05);
}

.points-badge {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: linear-gradient(135deg, #ffeaa7, #fdcb6e);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 1.1rem;
  font-weight: bold;
  box-shadow: 0 4px 0 #f39c12;
}

#app-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

body.in-practice #app-main {
  max-width: 1080px;
}

.practice-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  column-gap: 2.5rem;
  row-gap: 0.75rem;
  align-items: start;
}

body.vertical-on .practice-layout {
  grid-template-columns: minmax(200px, 260px) 1fr 340px;
}

body.vertical-on .practice-header {
  grid-column: 1 / -1;
}

body.vertical-on .vertical-panel {
  grid-column: 1;
  grid-row: 2;
}

body.vertical-on .practice-content {
  grid-column: 2;
  grid-row: 2;
}

body.vertical-on .answer-sheet {
  grid-column: 3;
  grid-row: 2;
}

.practice-header {
  grid-column: 1;
  grid-row: 1;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.practice-content {
  grid-column: 1;
  grid-row: 2;
  min-width: 0;
}

.vertical-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  margin-left: auto;
}

.vertical-switch input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--primary);
  cursor: pointer;
}

.vertical-panel {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem !important;
  margin-bottom: 0;
  position: sticky;
  top: 4.5rem;
  max-height: calc(100vh - 5.5rem);
  overflow: hidden;
}

body.vertical-on .vertical-panel:not(.hidden) {
  display: flex;
}

.vertical-panel-title {
  margin: 0;
  font-size: 1rem;
  color: var(--primary);
  text-align: center;
}

.vertical-hint {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--text-muted);
}

.btn-vertical-start {
  width: 100%;
  margin-top: 0 !important;
  padding: 0.45rem 0.65rem !important;
  font-size: 0.88rem !important;
}

.vertical-stage {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.vertical-step {
  animation: verticalStepIn 0.45s ease forwards;
  opacity: 0;
  transform: translateY(6px);
}

@keyframes verticalStepIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.vertical-step-cap {
  margin: 0 0 0.2rem;
  font-size: 0.75rem;
  color: var(--text);
  line-height: 1.3;
}

.vertical-pre {
  margin: 0;
  padding: 0.35rem 0.45rem;
  background: #fff;
  border: 1px dashed #dfe6e9;
  border-radius: 6px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 0.95rem;
  line-height: 1.35;
  color: var(--text);
  white-space: pre;
}

.answer-sheet {
  grid-column: 2;
  grid-row: 2;
  width: 340px;
  padding: 0.75rem 0.85rem !important;
  margin-bottom: 0;
  position: sticky;
  top: 4.5rem;
  max-height: none;
  overflow: visible;
  align-self: start;
}

.sheet-title {
  margin: 0 0 0.55rem;
  font-size: 1.15rem;
  text-align: center;
  color: var(--primary);
}

.sheet-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0.4rem;
}

.sheet-btn {
  aspect-ratio: 1;
  width: 100%;
  height: auto;
  min-width: 0;
  padding: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1;
  border: 2px solid #dfe6e9;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--text-muted);
  cursor: pointer;
  transition: transform 0.1s, border-color 0.15s, background 0.15s;
}

.sheet-btn:hover {
  border-color: var(--secondary);
  transform: scale(1.06);
}

.sheet-btn.current {
  border-color: var(--primary);
  background: #ffeaa7;
  color: var(--primary);
  font-weight: bold;
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.25);
}

.sheet-btn.correct {
  background: #d5f5e3;
  border-color: var(--success);
  color: var(--success);
}

.sheet-btn.wrong {
  background: #fadbd8;
  border-color: var(--error);
  color: var(--error);
}

.sheet-legend {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem 0.55rem;
  margin-top: 0.55rem;
  padding-top: 0.45rem;
  border-top: 1px dashed #dfe6e9;
  font-size: 0.75rem;
  color: var(--text-muted);
  justify-content: center;
}

.sheet-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.sheet-legend .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid #dfe6e9;
  background: #fff;
}

.sheet-legend .dot.current {
  background: #ffeaa7;
  border-color: var(--primary);
}

.sheet-legend .dot.correct {
  background: #d5f5e3;
  border-color: var(--success);
}

.sheet-legend .dot.wrong {
  background: #fadbd8;
  border-color: var(--error);
}

@media (max-width: 720px) {
  .practice-layout {
    grid-template-columns: 1fr;
    column-gap: 0;
    row-gap: 1rem;
  }

  .practice-header {
    grid-column: 1;
    grid-row: 1;
  }

  .answer-sheet {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    position: static;
  }

  .practice-content {
    grid-column: 1;
    grid-row: 3;
  }

  body.vertical-on .practice-layout {
    grid-template-columns: 1fr;
  }

  body.vertical-on .practice-header {
    grid-column: 1;
    grid-row: 1;
  }

  body.vertical-on .vertical-panel:not(.hidden) {
    grid-column: 1;
    grid-row: 2;
    max-height: 220px;
    position: static;
  }

  body.vertical-on .answer-sheet {
    grid-column: 1;
    grid-row: 3;
  }

  body.vertical-on .practice-content {
    grid-column: 1;
    grid-row: 4;
  }

  .sheet-grid {
    grid-template-columns: repeat(10, 1fr);
  }
}

/* 首页：一屏展示，无纵向滚动 */
body.is-home {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body.is-home .site-header {
  flex-shrink: 0;
  padding: 0.45rem 1rem;
}

body.is-home .logo-mascot {
  font-size: 1.5rem;
}

body.is-home .site-title {
  font-size: 1.25rem;
}

body.is-home .site-sub {
  display: none;
}

body.is-home .nav-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.9rem;
}

body.is-home .points-badge {
  padding: 0.3rem 0.65rem;
  font-size: 0.95rem;
}

body.is-home #app-main {
  flex: 1;
  min-height: 0;
  max-width: 820px;
  width: 100%;
  padding: 0.5rem 1rem;
  margin: 0 auto;
  overflow: hidden;
}

#view-home.view.active {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.home-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: minmax(0, auto) minmax(0, 1fr) minmax(0, auto);
  grid-template-areas:
    "welcome stats"
    "modes modes"
    "badges badges";
  gap: 0.5rem;
  overflow: hidden;
}

.home-welcome {
  grid-area: welcome;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.85rem;
  margin-bottom: 0;
  text-align: left;
}

.home-welcome .mascot-large {
  font-size: 2.5rem;
  flex-shrink: 0;
  animation: none;
}

.home-welcome .welcome-text {
  font-size: 1.1rem;
  margin: 0 0 0.2rem;
}

.home-welcome .welcome-sub {
  font-size: 0.8rem;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.home-stats {
  grid-area: stats;
  margin-bottom: 0;
  padding: 0.65rem 0.85rem;
}

.home-stats h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.home-stats .stats-row {
  margin-bottom: 0.4rem;
}

.home-stats .stat-num {
  font-size: 1.35rem;
}

.home-stats .stat-label {
  font-size: 0.75rem;
}

.home-stats .progress-bar-wrap {
  height: 12px;
}

.home-stats .progress-hint {
  margin: 0.3rem 0 0;
  font-size: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.home-answer-mode {
  margin-top: 0.5rem;
  padding-top: 0.45rem;
  border-top: 1px dashed #dfe6e9;
}

.home-answer-mode .form-label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
}

.home-answer-mode .option-btn {
  font-size: 0.85rem;
  padding: 0.5rem 0.35rem;
}

.home-modes {
  grid-area: modes;
  grid-template-columns: repeat(3, 1fr);
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0;
  min-height: 0;
  align-self: stretch;
}

.home-modes .mode-btn {
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0.65rem;
  height: 100%;
  min-height: 0;
}

.home-modes .mode-icon {
  font-size: 1.75rem;
}

.home-modes .mode-title {
  font-size: 0.95rem;
  margin-top: 0.15rem;
}

.home-modes .mode-desc {
  font-size: 0.8rem;
}

.home-badges {
  grid-area: badges;
  margin-bottom: 0;
  padding: 0.45rem 0.75rem;
  min-height: 0;
  overflow: hidden;
}

.home-badges h2 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
}

.home-badges .badge-list {
  max-height: 2.8rem;
  overflow: hidden;
  gap: 0.35rem;
}

.home-badges .badge-chip {
  font-size: 0.72rem;
  padding: 0.2rem 0.45rem;
}

.view {
  display: none;
  animation: fadeIn 0.35s ease;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  border: 3px solid #fff;
}

.welcome-card {
  text-align: center;
  padding: 1.5rem;
  background: linear-gradient(180deg, #fff 0%, #ffeaa7 100%);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.mascot-large {
  font-size: 4rem;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.welcome-text {
  font-size: 1.5rem;
  color: var(--primary);
  margin: 0.5rem 0;
}

.welcome-sub {
  color: var(--text-muted);
  margin: 0;
}

.today-stats h2,
.badges-preview h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.stats-row {
  display: flex;
  justify-content: space-around;
  text-align: center;
  margin-bottom: 1rem;
}

.stat-num {
  display: block;
  font-size: 1.8rem;
  color: var(--primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.progress-bar-wrap {
  height: 16px;
  background: #dfe6e9;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--secondary), var(--success));
  border-radius: 999px;
  transition: width 0.5s ease;
}

.progress-hint {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0.5rem 0 0;
}

.mode-buttons {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  padding: 1.25rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font);
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.15);
}

.mode-btn:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.15);
}

.mode-speed {
  background: linear-gradient(135deg, #ff9f43, #ff6b35);
  color: #fff;
}

.mode-muldiv {
  background: linear-gradient(135deg, #a29bfe, #6c5ce7);
  color: #fff;
}

.mode-word {
  background: linear-gradient(135deg, #74b9ff, #0984e3);
  color: #fff;
}

.mode-icon {
  font-size: 2rem;
}

.mode-title {
  font-size: 1.4rem;
  margin-top: 0.25rem;
}

.mode-desc {
  font-size: 0.9rem;
  opacity: 0.9;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 0.75rem;
  background: #ffeaa7;
  border-radius: 999px;
  font-size: 0.9rem;
}

.badge-chip.locked {
  opacity: 0.4;
  filter: grayscale(1);
}

.view-title {
  text-align: center;
  font-size: 1.5rem;
  margin: 0.5rem 0 1rem;
}

.view-desc {
  text-align: center;
  color: var(--text-muted);
  margin-top: -0.5rem;
}

.back-btn {
  font-family: var(--font);
  background: none;
  border: none;
  color: var(--primary);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
}

.setup-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 1rem;
  color: var(--text-muted);
}

.option-group {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
}

.option-group-wrap {
  flex-wrap: wrap;
}

.option-btn {
  flex: 1;
  min-width: 0;
  padding: 0.7rem 0.5rem;
  font-family: var(--font);
  font-size: 1rem;
  border: 2px solid #dfe6e9;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.option-btn:hover {
  border-color: var(--secondary);
}

.option-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: bold;
}

@media (max-width: 400px) {
  .option-btn {
    font-size: 0.85rem;
    padding: 0.6rem 0.35rem;
  }
}

.btn-primary,
.btn-secondary,
.btn-text,
.btn-speak {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  border-radius: 14px;
  transition: transform 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 0.85rem 1.5rem;
  font-size: 1.15rem;
  box-shadow: 0 4px 0 var(--primary-dark);
}

.btn-primary:hover {
  transform: scale(1.03);
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--primary-dark);
}

.btn-large {
  width: 100%;
  padding: 1rem;
  font-size: 1.25rem;
}

.btn-secondary {
  background: var(--secondary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  width: 100%;
  margin-top: 0.5rem;
}

.btn-text {
  background: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: block;
  margin: 1rem auto;
}

.practice-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.timer {
  background: #ffeaa7;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-weight: bold;
}

.timer.warning {
  background: #fab1a0;
  animation: pulse 0.8s infinite;
}

@keyframes pulse {
  50% { transform: scale(1.08); }
}

.question-card {
  text-align: center;
}

.question-text {
  font-size: 2.5rem;
  margin: 1rem 0 1.5rem;
  color: var(--primary);
  font-weight: normal;
  letter-spacing: 0.02em;
}

.question-text.long-expr {
  font-size: 2rem;
}

.word-question {
  font-size: 1.25rem;
  line-height: 1.8;
  text-align: left;
  margin: 0 0 1rem;
  min-height: 4rem;
}

.btn-speak {
  background: #dfe6e9;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  margin-bottom: 1rem;
  border-radius: 999px;
}

.answer-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.answer-input {
  font-size: 1.5rem;
  width: 140px;
  padding: 0.75rem;
  text-align: center;
  border: 3px solid #dfe6e9;
  border-radius: 14px;
}

.answer-input:focus {
  outline: none;
  border-color: var(--secondary);
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 0.5rem 0 0.25rem;
}

.choice-btn {
  font-family: var(--font);
  font-size: 1.35rem;
  padding: 0.85rem 0.25rem;
  border: 3px solid #dfe6e9;
  border-radius: 16px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition: transform 0.12s, border-color 0.15s, background 0.15s;
  box-shadow: 0 4px 0 #dfe6e9;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--secondary);
  transform: translateY(-2px);
}

.choice-btn:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #dfe6e9;
}

.choice-btn:disabled {
  cursor: default;
}

.choice-btn.choice-correct {
  background: #d5f5e3;
  border-color: var(--success);
  color: var(--success);
  box-shadow: 0 4px 0 #27ae60;
}

.choice-btn.choice-wrong {
  background: #fadbd8;
  border-color: var(--error);
  color: var(--error);
  box-shadow: 0 4px 0 #c0392b;
}

.feedback {
  min-height: 2rem;
  margin: 1rem 0 0.5rem;
  font-size: 1.15rem;
  font-weight: bold;
}

.feedback.correct {
  color: var(--success);
}

.feedback.wrong {
  color: var(--error);
}

.hidden {
  display: none !important;
}

/* 完成练习：一屏展示，不出现页面滚动条 */
body.on-result {
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
}

body.on-result #app-main {
  padding: 0.4rem 1rem 0.5rem;
  overflow: hidden;
}

#view-result.view.active {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - 5.75rem);
  max-height: calc(100vh - 5.75rem);
  overflow: hidden;
  gap: 0.4rem;
}

#view-result.result-no-wrong .result-actions {
  margin-top: 0.35rem;
}

#view-result .card {
  margin-bottom: 0;
  padding: 0.55rem 0.75rem;
  border-width: 2px;
}

.result-hero {
  text-align: center;
  padding: 0.45rem 0.65rem;
  background: linear-gradient(180deg, #ffeaa7, #fff);
  border-radius: var(--radius);
  margin-bottom: 0;
  flex-shrink: 0;
}

.result-stars {
  font-size: 1.35rem;
  letter-spacing: 0.12rem;
  line-height: 1.2;
  animation: starPop 0.6s ease;
}

@keyframes starPop {
  0% { transform: scale(0); opacity: 0; }
  70% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

.result-title {
  font-size: 1.15rem;
  color: var(--primary);
  margin: 0.15rem 0 0;
  line-height: 1.25;
}

.result-sub {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.25;
}

.result-stats {
  flex-shrink: 0;
}

.result-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.25rem 0.35rem;
  text-align: center;
}

.result-stat-val {
  display: block;
  font-size: 1.05rem;
  color: var(--primary);
  line-height: 1.2;
}

.result-stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  line-height: 1.2;
}

#view-result .wrong-list-card {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#view-result .wrong-list-card h3 {
  margin: 0 0 0.2rem;
  font-size: 0.82rem;
  line-height: 1.2;
}

#view-result .wrong-table {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.wrong-table-head,
#view-result .wrong-list li.wrong-row {
  display: grid;
  grid-template-columns: 2.2rem 1fr 1fr;
  gap: 0.35rem 0.45rem;
  align-items: center;
  padding: 0 0.35rem;
}

.wrong-table-head {
  flex-shrink: 0;
  padding-bottom: 0.2rem;
  margin-bottom: 0.15rem;
  border-bottom: 1px solid #dfe6e9;
  font-size: 0.72rem;
  font-weight: bold;
  color: var(--text-muted);
}

.wrong-table-head .wrong-col.no {
  text-align: center;
}

.wrong-table-head .wrong-col.wrong {
  text-align: left;
}

.wrong-table-head .wrong-col.right {
  text-align: left;
}

.wrong-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

#view-result .wrong-list {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

#view-result .wrong-list li.wrong-row {
  font-size: 0.76rem;
  line-height: 1.3;
  background: #f8f9fa;
  border-radius: 4px;
  padding: 0.2rem 0.35rem;
  flex-shrink: 0;
}

#view-result .wrong-col.no {
  text-align: center;
  color: var(--text-muted);
  font-weight: bold;
}

#view-result .wrong-col.wrong {
  text-align: left;
  color: var(--error);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#view-result .wrong-col.right {
  text-align: left;
  color: var(--success);
  font-weight: bold;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wrong-list li {
  padding: 0.75rem;
  border-bottom: 2px dashed #dfe6e9;
  font-size: 0.95rem;
}

.wrong-list li:last-child {
  border-bottom: none;
}

.result-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: nowrap;
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 0.15rem;
}

.result-actions .btn-primary,
.result-actions .btn-secondary {
  flex: 1;
  min-width: 0;
  width: auto;
  margin-top: 0;
  padding: 0.5rem 0.65rem;
  font-size: 0.88rem;
  border-radius: 10px;
}

@media (max-width: 520px) {
  #view-result.view.active {
    height: calc(100dvh - 6.5rem);
    max-height: calc(100vh - 6.5rem);
  }

  .result-stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.2rem;
  }

  .result-stat-val {
    font-size: 1rem;
  }
}

.mistake-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.mistake-toolbar .btn-primary {
  flex-shrink: 0;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  white-space: nowrap;
}

.mistake-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tab-btn {
  font-family: var(--font);
  padding: 0.5rem 1rem;
  border: 2px solid #dfe6e9;
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.mistake-list {
  list-style: none;
  padding: 0.45rem 0.55rem;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.65rem;
  line-height: 1.25;
}

.mistake-item {
  padding: 0;
  margin: 0;
  border: none;
}

.mistake-eq {
  display: inline-block;
  font-size: 0.95rem;
  color: var(--text);
  padding: 0.12rem 0.35rem;
  background: #f8f9fa;
  border-radius: 4px;
  white-space: nowrap;
}

.mistake-eq::after {
  content: '；';
  color: var(--text-muted);
  margin-left: 0.1rem;
}

.mistake-item:last-child .mistake-eq::after {
  content: '';
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  text-align: center;
}

.overview-val {
  display: block;
  font-size: 1.6rem;
  color: var(--primary);
}

.overview-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.chart-card h3 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

#accuracy-chart {
  width: 100%;
  height: auto;
  max-height: 200px;
}

.chart-empty {
  text-align: center;
  color: var(--text-muted);
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid #f1f2f6;
  font-size: 0.95rem;
}

.empty-hint {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(45, 52, 54, 0.9);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-size: 1rem;
  z-index: 1000;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

body.dialog-open {
  overflow: hidden;
}

.dialog-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(45, 52, 54, 0.45);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.28s ease;
}

.dialog-overlay.show {
  opacity: 1;
}

.dialog-card {
  position: relative;
  width: 100%;
  max-width: 340px;
  padding: 1.5rem 1.35rem 1.25rem;
  background: linear-gradient(180deg, #fff 0%, #fff8e7 100%);
  border-radius: 24px;
  border: 3px solid #fff;
  box-shadow:
    0 20px 50px rgba(45, 52, 54, 0.2),
    0 0 0 4px rgba(255, 107, 53, 0.15);
  text-align: center;
  transform: scale(0.88) translateY(12px);
  transition: transform 0.32s cubic-bezier(0.34, 1.4, 0.64, 1);
}

.dialog-overlay.show .dialog-card {
  transform: scale(1) translateY(0);
}

.dialog-deco {
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 5px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--secondary), var(--primary), #fdcb6e);
}

.dialog-icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0.25rem auto 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #ffeaa7, #fdcb6e);
  border-radius: 50%;
  box-shadow: 0 6px 0 #f39c12, inset 0 2px 4px rgba(255, 255, 255, 0.6);
}

.dialog-icon {
  font-size: 2.25rem;
  line-height: 1;
}

.dialog-title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--primary);
}

.dialog-message {
  margin: 0 0 1.25rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
}

.dialog-actions {
  display: flex;
  gap: 0.65rem;
}

.dialog-btn {
  flex: 1;
  font-family: var(--font);
  font-size: 1.05rem;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  border: none;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
}

.dialog-btn:active {
  transform: translateY(2px);
}

.dialog-btn-confirm {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 0 var(--primary-dark);
}

.dialog-btn-cancel {
  background: #fff;
  color: var(--text-muted);
  border: 2px solid #dfe6e9;
  box-shadow: 0 3px 0 #dfe6e9;
}

.dialog-overlay[data-type="alert"] .dialog-actions .dialog-btn-confirm {
  flex: 1;
  max-width: 100%;
}

.badge-popup {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.3s ease;
}

.badge-popup-inner {
  background: #fff;
  padding: 2rem;
  border-radius: var(--radius);
  text-align: center;
  animation: starPop 0.5s ease;
  box-shadow: var(--shadow);
}

.badge-popup-icon {
  font-size: 4rem;
  display: block;
}

.badge-popup-title {
  font-size: 1.2rem;
  color: var(--primary);
  margin: 0.5rem 0;
}

.badge-popup-name {
  font-size: 1.4rem;
  margin: 0;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiFall 2.5s ease-out forwards;
}

@keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

@media (max-width: 420px) {
  .home-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "welcome"
      "stats"
      "modes"
      "badges";
    grid-template-rows: auto auto minmax(0, 1fr) auto;
  }

  .home-modes {
    grid-template-columns: 1fr;
  }

  .home-welcome .welcome-sub {
    white-space: normal;
  }
}

@media (max-height: 640px) {
  html { font-size: 15px; }

  .home-welcome .mascot-large {
    font-size: 2rem;
  }

  .home-modes .mode-btn {
    padding: 0.5rem;
  }

  .home-badges .badge-list {
    max-height: 2.2rem;
  }
}

@media (max-width: 480px) {
  html { font-size: 16px; }
  .question-text { font-size: 2rem; }
  .site-header { justify-content: center; }
}