body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.app {
  width: 100%;
  max-width: 480px;
}

.hidden {
  display: none !important;
}

/* ================================
   Start Screen
================================ */
#start-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.start-card {
  position: relative;
  background: var(--bg-card);
  border-radius: 1.25rem;
  box-shadow: 0 4px 20px var(--shadow);
  border-top: 5px solid #17B890;
  padding: 2.5rem 2rem;
  width: 100%;
  text-align: center;
}


.start-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #15a882 0%, #0f8f6d 50%, #0a6650 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.start-subtitle {
  font-size: 0.95rem;
  color: #17B890;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 0.03em;
}

.feature-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  margin-bottom: 1.75rem;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}


.badge-sep {
  color: var(--text-sub);
  font-size: 0.9rem;
  line-height: 1;
}

/* Mode selection */
.mode-section {
  background: var(--bg-section);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  margin-bottom: 1rem;
  text-align: left;
}

.mode-section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.mode-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.mode-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.6rem;
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.mode-option:hover {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.mode-option:has(input:checked) {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.mode-option input[type="radio"] {
  accent-color: #17B890;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.mode-option-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.mode-option-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.mode-option-sub {
  font-size: 0.72rem;
  color: var(--text-sub);
}

/* Quiz type selection */
.type-section {
  background: var(--bg-section);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  margin-bottom: 1rem;
  text-align: left;
}

.type-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.type-section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.extra-toggle-link {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-sub);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.extra-toggle-link:hover { color: #17B890; }

.extra-toggle-link .extra-section-chevron {
  transition: transform 0.2s;
}

.extra-toggle-link.open .extra-section-chevron {
  transform: rotate(180deg);
}

.type-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.type-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.6rem;
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.type-option:hover {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.type-option:has(input:checked) {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.type-option input[type="radio"] {
  accent-color: #17B890;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.type-option-text {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.type-option-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.type-option-count {
  font-size: 0.75rem;
  color: var(--text-sub);
  white-space: nowrap;
}

/* Challenge option */
.type-option--challenge {
  border-color: rgba(212, 175, 55, 0.5);
  box-shadow: 0 2px 12px rgba(212, 175, 55, 0.3);
}

/* Extra practice options (hidden until "全て表示") */
.type-option--extra {
  display: none;
  background: var(--border);
  border-color: var(--border-mid);
}

.type-options.show-all .type-option--extra {
  display: flex;
}

/* Font selection */
.font-section {
  background: var(--bg-section);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  margin-bottom: 2rem;
  text-align: left;
}

.font-section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.font-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.font-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.6rem;
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.font-option:hover {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.font-option.selected {
  background: var(--brand-light-bg);
  border-color: #17B890;
}

.font-option input[type="radio"] {
  display: none;
}

.font-option-info {
  display: contents;
}

.font-option-top {
  display: contents;
}

.font-option-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.font-option:not(.selected) .font-option-name {
  display: none;
}

.font-option-preview {
  font-size: 1rem;
  color: var(--text-heading);
  line-height: 1;
  direction: rtl;
}

.start-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0 0;
}

.start-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-footer);
}

.footer-copy {
  color: var(--text-footer);
}

.seo-desc {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.8;
  text-align: left;
}
.seo-desc h2 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 0.75rem;
}
.seo-desc p + p {
  margin-top: 0.875rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.footer-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-sep {
  color: var(--border-mid);
}

.footer-link {
  color: var(--text-footer);
  text-decoration: none;
}

.footer-link:hover {
  color: #17B890;
  text-decoration: underline;
}

.footer-link--accent { color: #17B890; }

.footer-link--current {
  color: var(--text-footer);
  text-decoration: underline;
  cursor: default;
}

.start-btn {
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.9rem 3rem;
  background: linear-gradient(135deg, #1de9b6 0%, #17B890 50%, #0d7a60 100%);
  color: #fff;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  box-shadow: 0 4px 20px var(--brand-glow);
  transition: opacity 0.15s;
}

.start-btn:hover {
  opacity: 0.9;
}

.alefbet-link {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0.4rem;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #17B890;
  text-decoration: none;
  transition: color 0.15s;
}

.alefbet-link svg {
  flex-shrink: 0;
  margin-top: 0.1em;
}

.alefbet-link:hover {
  color: #17B890;
}

/* ================================
   Quiz Screen
================================ */
.header {
  display: flex;
  justify-content: flex-start;
  align-items: flex-end;
  margin-bottom: 0;
}

.quiz-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.9rem 0.55rem;
  background: var(--bg-card);
  border: none;
  border-radius: 0.75rem 0.75rem 0 0;
  border-top: 5px solid #17B890;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  color: #17B890;
  cursor: pointer;
  transition: background 0.15s;
}

.quiz-back-link:hover {
  background: var(--brand-light-bg);
}

.timer {
  flex: 1;
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-sub);
  text-align: right;
}

.score {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  box-shadow: 0 1px 3px var(--shadow);
}

/* Card */
.card {
  background: var(--bg-card);
  border-radius: 1.25rem;
  border-top-left-radius: 0;
  box-shadow: 0 4px 20px var(--shadow);
  padding: 2rem 1.5rem;
}

/* Progress */
.progress-bar-wrap {
  background: var(--border);
  border-radius: 9999px;
  height: 8px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #1de9b6 0%, #17B890 50%, #0d7a60 100%);
  border-radius: 9999px;
  transition: width 0.4s ease;
  width: 0%;
}

.progress-info {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.progress-info::before {
  content: '';
  flex: 1;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-sub);
  text-align: center;
}

.progress-correct {
  color: var(--correct-border);
  font-weight: 700;
}

.progress-wrong {
  color: var(--progress-wrong-color);
  font-weight: 600;
}

/* Hebrew letter */
.letter-display {
  font-family: 'Frank Ruhl Libre', serif;
  font-size: 8rem;
  line-height: 1.1;
  text-align: center;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
  min-height: 10rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  user-select: none;
}

.letter-correct {
  color: #17B890;
}

.vowel-length-label {
  text-align: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-sub);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
}

/* Choice buttons */
.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.choice-btn {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.9rem 0.5rem;
  border: 2px solid var(--border);
  border-radius: 0.75rem;
  background: var(--bg-section);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s;
  line-height: 1.3;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

@media (hover: hover) {
  .choice-btn:hover:not(:disabled) {
    background: var(--brand-light-bg);
    border-color: #17B890;
  }
}

.choice-btn:disabled {
  cursor: not-allowed;
}

.choice-btn.correct {
  background: var(--correct-bg);
  border-color: var(--correct-border);
  color: var(--correct-text);
}

.choice-btn.wrong {
  background: var(--wrong-bg);
  border-color: var(--wrong-border);
  color: var(--wrong-text);
}

/* Reverse quiz: name → character */
.letter-display.reverse-name {
  font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.5;
  min-height: unset;
  margin-bottom: 2rem;
}

.choices.reverse-mode .choice-btn {
  font-size: 3.5rem;
  line-height: 1.2;
  direction: rtl;
  padding: 0.75rem 0.5rem;
}

/* Vowel quiz: 5-button row 1 + ə / 無音 row 2 */
.choices.vowel-mode {
  grid-template-columns: repeat(10, 1fr);
}

.choices.vowel-mode .choice-btn {
  font-size: 1.4rem;
}

.choices.vowel-mode .choice-btn[data-index="0"],
.choices.vowel-mode .choice-btn[data-index="1"],
.choices.vowel-mode .choice-btn[data-index="2"],
.choices.vowel-mode .choice-btn[data-index="3"],
.choices.vowel-mode .choice-btn[data-index="4"] {
  grid-column: span 2;
}

.choices.vowel-mode .choice-btn[data-index="5"],
.choices.vowel-mode .choice-btn[data-index="6"] {
  grid-column: span 5;
}

/* Next button */
.next-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.hint-box:not(:empty) {
  width: 100%;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  background: var(--brand-light-bg);
  border-left: 3px solid #17B890;
  border-radius: 0 0.4rem 0.4rem 0;
  padding: 0.6rem 0.75rem;
  text-align: left;
  animation: hint-fade-in 0.25s ease;
}

@keyframes hint-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.next-wrap.hidden {
  display: none;
}

.next-btn {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, #17B890, #0FA882);
  color: #fff;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--brand-glow-next);
  transition: opacity 0.15s, transform 0.1s;
}

.next-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ================================
   Result Screen
================================ */
#result-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.result-card {
  background: var(--bg-card);
  border-radius: 1.25rem;
  box-shadow: 0 4px 20px var(--shadow);
  padding: 3rem 2rem;
  text-align: center;
  width: 100%;
}

.result-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
}

.result-rank {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.25rem;
}

.rank-emoji {
  font-size: 5rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.rank-label {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 1.25rem;
}

.result-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.result-stat-label {
  font-size: 0.85rem;
  color: var(--text-sub);
  font-weight: 500;
}

.result-stat-value {
  font-size: 2.75rem;
  font-weight: 700;
  color: #17B890;
  font-variant-numeric: tabular-nums;
}

.result-unit {
  font-size: 2rem;
  font-weight: 600;
}

.result-detail {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.result-message {
  font-size: 1.05rem;
  color: var(--text-sub);
  margin-bottom: 1.5rem;
}

.install-section {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  background: var(--bg-section);
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  text-align: center;
}
.install-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 0.6rem;
}
.install-btn {
  display: inline-block;
  padding: 0.5rem 1.4rem;
  background: var(--bg-card);
  border: 1.5px solid var(--border-mid);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.install-btn:hover { border-color: #17B890; color: #17B890; }
.install-ios {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.book-section {
  border-top: 1px solid var(--border);
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  text-align: center;
}

.book-pr {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-footer);
  letter-spacing: 0.03em;
}

.book-title-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  line-height: 1.3;
  white-space: nowrap;
}

.book-title-main {
  color: #17B890;
}

@media (max-width: 480px) {
  .book-title-sub { display: none; }
}

.book-title-link:hover .book-title-main {
  text-decoration: underline;
}

.book-author-text {
  font-size: 0.75rem;
  color: var(--text-footer);
  margin-top: 0.1rem;
}

.share-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  color: #fff;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  flex: 1;
  max-width: 160px;
  transition: opacity 0.15s, transform 0.1s;
}

.share-btn-line {
  background: #06C755;
}

.share-btn-x {
  background: #000;
}

.share-btn-native {
  background: #17B890;
}

@media (max-width: 480px) {
  .share-btn-line span {
    display: none;
  }

  .share-btn-line {
    max-width: 56px;
    padding: 0.75rem;
  }
}

.share-btn:hover {
  opacity: 0.85;
}

.x-logo, .line-logo {
  width: 1.1rem;
  height: 1.1rem;
  fill: #fff;
  flex-shrink: 0;
}

/* Perfect演出 */
#confetti-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
}

@keyframes perfect-glow {
  0%, 100% { box-shadow: 0 0 18px 4px rgba(251, 191, 36, 0.5), 0 4px 20px var(--shadow); border-color: #fbbf24; }
  50%       { box-shadow: 0 0 32px 8px rgba(251, 191, 36, 0.8), 0 4px 20px var(--shadow); border-color: #fde68a; }
}

.result-card--perfect {
  border: 2px solid #fbbf24;
  animation: perfect-glow 1.8s ease-in-out infinite;
}

.result-card--perfect .result-title {
  color: #d97706;
}

[data-theme="dark"] .result-card--perfect .result-title {
  color: #fbbf24;
}

.result-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.share-section {
  margin-bottom: 0;
}

.share-section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-footer);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.share-section-label::before,
.share-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}


.retry-btn, .home-btn {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.retry-btn {
  background: linear-gradient(135deg, #1de9b6 0%, #17B890 50%, #0d7a60 100%);
  color: #fff;
  box-shadow: 0 4px 20px var(--brand-glow);
}

.home-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--border);
  color: var(--text-secondary);
}

.retry-btn:hover, .home-btn:hover {
  opacity: 0.85;
}

/* ================================
   Mastery grids on result screen
================================ */
.mastery-section:not(:empty) {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.mastery-heading {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.mastery-subsect {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-sub);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0.75rem 0 0.4rem;
}
.mastery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 0.3rem;
}
.mc {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.4rem 0.15rem 0.3rem;
  border-radius: 0.4rem;
  border: 1.5px solid transparent;
  text-align: center;
  text-decoration: none;
}
a.mc:hover { opacity: 0.8; }
.mc-none { background: var(--bg-card); border-color: var(--border); }
.mc-low  { background: #fee2e2; border-color: #fca5a5; }
.mc-mid  { background: #fef9c3; border-color: #fde047; }
.mc-high { background: #dcfce7; border-color: #86efac; }

[data-theme="dark"] .mc-low  { background: #4c1d1d; border-color: #7f1d1d; }
[data-theme="dark"] .mc-mid  { background: #3d3100; border-color: #713f12; }
[data-theme="dark"] .mc-high { background: #14432a; border-color: #166534; }

.mc-char {
  font-family: 'Cardo', serif;
  font-size: 1.4rem;
  line-height: 1.3;
  color: var(--text-heading);
  direction: rtl;
}
.mc-none .mc-char { color: var(--text-sub); }
.mc-name {
  font-size: 0.5rem;
  color: var(--text-sub);
  margin-top: 0.05rem;
  line-height: 1.2;
}
.mc-stat {
  font-size: 0.65rem;
  font-weight: 700;
  margin-top: 0.1rem;
  color: var(--text-sub);
}
.mc-low  .mc-name, .mc-low  .mc-stat { color: #b91c1c; }
.mc-mid  .mc-name, .mc-mid  .mc-stat { color: #854d0e; }
.mc-high .mc-name, .mc-high .mc-stat { color: #15803d; }

[data-theme="dark"] .mc-low  .mc-name,
[data-theme="dark"] .mc-low  .mc-stat { color: #fca5a5; }
[data-theme="dark"] .mc-mid  .mc-name,
[data-theme="dark"] .mc-mid  .mc-stat { color: #fde047; }
[data-theme="dark"] .mc-high .mc-name,
[data-theme="dark"] .mc-high .mc-stat { color: #86efac; }


/* ================================
   Responsive
================================ */
@media (max-width: 400px) {
  .home-btn-icon {
    display: none;
  }

  .letter-display {
    font-size: 6rem;
    min-height: 8rem;
  }

  .choice-btn {
    font-size: 0.9rem;
    padding: 0.75rem 0.4rem;
  }

  .card {
    padding: 1.5rem 1rem;
  }

  .start-card {
    padding: 2rem 1.25rem;
  }

  .start-title {
    font-size: 1.55rem;
    margin-top: 1.5rem;
  }

  .result-stats {
    gap: 1.5rem;
  }

  .result-stat-value {
    font-size: 2.25rem;
  }
}

/* ================================
   Theme Toggle
================================ */
.theme-toggle {
  background: none;
  border: none;
  border-radius: 6px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-sub);
  padding: 0;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.theme-toggle:hover {
  background: var(--brand-light-bg);
  color: #17B890;
}

.theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: block; color: #fbbf24; }

.start-card .theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

/* ================================
   Language Toggle
================================ */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.lang-toggle-btn {
  color: var(--text-sub);
  text-decoration: none;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
  transition: color 0.15s;
}

.lang-toggle-btn:hover { color: #17B890; }
.lang-toggle-btn--active { color: #17B890; }
.lang-toggle-sep { color: var(--border-mid); }

/* ================================
   Info Button & Modal
================================ */
.info-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sub);
  padding: 0 0.25rem;
  line-height: 1;
  vertical-align: middle;
  transition: color 0.15s;
  display: inline-flex;
  align-items: center;
}
.info-btn:hover { color: #17B890; }

.info-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.info-modal-overlay.hidden { display: none; }

.info-modal {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 1.5rem 1.5rem 1.25rem;
  max-width: 340px;
  width: 90%;
  position: relative;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.info-modal-close {
  position: absolute;
  top: 0.7rem;
  right: 0.8rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sub);
  font-size: 1.3rem;
  line-height: 1;
  padding: 0.2rem 0.4rem;
}
.info-modal-close:hover { color: var(--text-main); }
.info-modal-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 0 0 0.9rem;
}
.info-modal-body {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.75;
}
.info-modal-body ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.info-modal-body li {
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--border);
}
.info-modal-body li:last-child { border-bottom: none; }
.info-modal-body p { margin: 0 0 0.5rem; }
.info-modal-body p:last-child { margin-bottom: 0; }