/* ========== Reset & Base ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ========== Skip Link ========== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 10px 20px;
  border-radius: 0 0 8px 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* main:focus outline suppression (tabindex="-1" target) */
#main:focus {
  outline: none;
}

:root {
  --primary: #6C63FF;
  --primary-light: #8B85FF;
  --primary-bg: #F0EEFF;
  --correct: #4CAF50;
  --correct-bg: #E8F5E9;
  --wrong: #FF5252;
  --wrong-bg: #FFEBEE;
  --text: #333;
  --text-light: #666;
  --bg: #FAFAFA;
  --card: rgba(255,255,255,0.85);
  --card-border: rgba(255,255,255,0.5);
  --shadow: 0 2px 16px rgba(108,99,255,0.08);
  --radius: 16px;
  --choice-bg: var(--primary-bg);
  --choice-hover: #fff;
  --explain-bg: #f8f8f8;
  --divider: #f0f0f0;
  --timer-track: #e0e0e0;
  --progress-track: #e0e0e0;
}

[data-theme="dark"] {
  --primary-bg: rgba(108,99,255,0.15);
  --correct-bg: rgba(76,175,80,0.15);
  --wrong-bg: rgba(255,82,82,0.15);
  --text: #E8E8E8;
  --text-light: #AAA;
  --bg: #1A1A2E;
  --card: rgba(30,30,50,0.8);
  --card-border: rgba(255,255,255,0.08);
  --shadow: 0 2px 16px rgba(0,0,0,0.3);
  --choice-bg: rgba(108,99,255,0.12);
  --choice-hover: rgba(108,99,255,0.22);
  --explain-bg: rgba(255,255,255,0.05);
  --divider: rgba(255,255,255,0.08);
  --timer-track: rgba(255,255,255,0.12);
  --progress-track: rgba(255,255,255,0.12);
}

[data-theme="dark"] body,
body[data-theme="dark"] {
  background-image:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(108,99,255,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(139,133,255,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(255,209,102,0.06) 0%, transparent 50%);
}

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(108,99,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(139,133,255,0.06) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(255,209,102,0.04) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  padding-bottom: env(safe-area-inset-bottom);
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image:
    radial-gradient(circle 2px at 15% 25%, rgba(108,99,255,0.12) 0%, transparent 2px),
    radial-gradient(circle 1.5px at 85% 15%, rgba(139,133,255,0.10) 0%, transparent 1.5px),
    radial-gradient(circle 2px at 70% 65%, rgba(108,99,255,0.08) 0%, transparent 2px),
    radial-gradient(circle 1.5px at 25% 75%, rgba(255,152,0,0.08) 0%, transparent 1.5px),
    radial-gradient(circle 2px at 50% 40%, rgba(76,175,80,0.06) 0%, transparent 2px),
    radial-gradient(circle 1px at 40% 90%, rgba(108,99,255,0.10) 0%, transparent 1px),
    radial-gradient(circle 1.5px at 90% 50%, rgba(233,30,99,0.06) 0%, transparent 1.5px);
}

/* ========== Header ========== */
.header {
  position: relative;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  text-align: center;
  padding: 24px 16px 20px;
  padding-top: calc(24px + env(safe-area-inset-top));
  box-shadow: 0 4px 24px rgba(108,99,255,0.25);
}

.header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.header p {
  font-size: 0.85rem;
  opacity: 0.9;
  margin-top: 4px;
}

.header-controls {
  position: absolute;
  top: 14px;
  right: 12px;
  display: flex;
  gap: 6px;
}

.header-toggle {
  background: rgba(255,255,255,0.2);
  border: 1.5px solid rgba(255,255,255,0.4);
  color: white;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.header-toggle svg { display: block; }
.icon-moon,
.icon-sound-off { display: none; }

/* Theme toggle: dark active */
.header-toggle.is-dark .icon-sun { display: none; }
.header-toggle.is-dark .icon-moon { display: block; }

/* Sound toggle: muted */
.header-toggle.is-muted .icon-sound-on { display: none; }
.header-toggle.is-muted .icon-sound-off { display: block; }

.header-toggle:hover {
  background: rgba(255,255,255,0.3);
}

.header-toggle.toggled-off {
  background: rgba(0,0,0,0.15);
  border-color: rgba(255,255,255,0.25);
  opacity: 0.7;
}

/* ========== Ad Unit ========== */
.ad-unit {
  text-align: center;
  margin: 16px auto;
  max-width: 600px;
  min-height: 50px;
  overflow: hidden;
}

/* 開発中のみ表示するプレースホルダー（本番ではAdSenseコードに差し替え） */
.ad-placeholder {
  background: var(--explain-bg);
  border: 2px dashed var(--divider);
  border-radius: 8px;
  text-align: center;
  padding: 20px;
  margin: 16px auto;
  max-width: 600px;
  color: #aaa;
  font-size: 0.8rem;
}

/* ========== Container ========== */
.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

/* ========== Splash Screen ========== */
.splash-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  animation: fadeIn 0.6s ease;
}

.splash-exit {
  animation: splashOut 0.3s ease forwards;
}

.splash-icon {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 800;
  color: white;
  margin-bottom: 20px;
  animation: splashBounce 1s ease infinite;
}

.splash-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.splash-sub {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.splash-start-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  border: none;
  border-radius: 50px;
  padding: 16px 48px;
  font-size: 1.15rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.35);
  animation: pulse 2s ease infinite;
}

.splash-start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(108, 99, 255, 0.45);
}

.splash-stats {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-light);
}

.splash-stats span {
  background: var(--primary-bg);
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 600;
}

/* ========== Countdown ========== */
.countdown-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
}

.countdown-info {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 32px;
  font-weight: 600;
}

.countdown-number {
  font-size: 6rem;
  font-weight: 900;
  color: var(--primary);
  animation: countdown-pop 0.7s ease;
  line-height: 1;
}

.countdown-pop {
  animation: countdown-pop 0.7s ease;
}

/* ========== Level Select ========== */
.level-screen {
  animation: fadeIn 0.3s ease;
}

.level-back {
  margin-bottom: 20px;
}

.level-header {
  text-align: center;
  margin-bottom: 4px;
}

.level-header-emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 4px;
}

.level-header-name {
  font-size: 1.4rem;
  font-weight: 700;
}

.level-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.level-card {
  background: var(--card);
  border: 2px solid transparent;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.2s ease;
  font-family: inherit;
  text-align: left;
}

.level-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.15);
}

.level-card:active {
  transform: translateY(0);
}

.level-emoji {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.level-name {
  font-size: 1.1rem;
  font-weight: 700;
  display: block;
  color: var(--text);
}

.level-desc {
  font-size: 0.8rem;
  color: var(--text-light);
  display: block;
}

.level-best {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 3px 10px;
  border-radius: 8px;
  white-space: nowrap;
}

/* ========== Category Select ========== */
.section-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.section-sub {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.category-card {
  background: var(--card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 2px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  font-family: inherit;
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.15);
}

.category-card:active {
  transform: translateY(0);
}

.category-emoji { font-size: 2rem; }
.category-name { font-size: 1rem; font-weight: 700; color: var(--text); }
.category-desc { font-size: 0.75rem; color: var(--text-light); text-align: center; }

.category-grid .category-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.category-best {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 2px 8px;
  border-radius: 8px;
  margin-top: 2px;
}

/* ========== Ranking ========== */
.ranking-section {
  margin-top: 28px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.ranking-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}

.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--divider);
  font-size: 0.85rem;
}

.ranking-item:last-child { border-bottom: none; }

.ranking-num {
  width: 22px;
  height: 22px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.ranking-item:nth-child(1) .ranking-num { background: #FFD700; color: #7A5C00; }
.ranking-item:nth-child(2) .ranking-num { background: #C0C0C0; color: #555; }
.ranking-item:nth-child(3) .ranking-num { background: #CD7F32; color: #fff; }

.ranking-info { flex: 1; color: var(--text); }
.ranking-pct { font-weight: 700; color: var(--primary); }
.ranking-date { font-size: 0.75rem; color: #aaa; }

/* ========== Quiz ========== */
.quiz-screen {
  animation: fadeIn 0.3s ease;
}

.quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.back-btn {
  background: none;
  border: 1.5px solid var(--divider);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--text-light);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.back-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--progress-track);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: var(--progress-w, 0%);
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 4px;
  transition: width 0.4s ease;
}

.progress-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}

/* ========== Timer ========== */
.quiz-timer {
  height: 6px;
  background: var(--timer-track);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 6px;
}

.timer-bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 3px;
  transition: none;
}

.timer-bar.timer-running {
  width: 0%;
  transition: width 15s linear;
}

.timer-hidden {
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.timer-bar.timer-danger {
  background: linear-gradient(90deg, var(--wrong), #FF8A80);
}

.timer-text {
  text-align: right;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.timer-text::after {
  content: "秒";
  font-weight: 400;
  margin-left: 1px;
}

.timer-danger-text {
  color: var(--wrong);
  animation: pulse-text 0.5s ease infinite alternate;
}

@keyframes pulse-text {
  from { opacity: 1; }
  to { opacity: 0.5; }
}

.quiz-card {
  background: var(--card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 20px;
}

.quiz-card.slide-in {
  animation: slideIn 0.35s ease;
}

.quiz-question {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.7;
}

.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.choice-btn {
  background: var(--choice-bg);
  border: 2px solid transparent;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
  color: var(--text);
}

.choice-stagger {
  opacity: 0;
  animation: staggerIn 0.3s ease forwards;
}

.choice-delay-0 { animation-delay: 0s; }
.choice-delay-1 { animation-delay: 0.06s; }
.choice-delay-2 { animation-delay: 0.12s; }
.choice-delay-3 { animation-delay: 0.18s; }

.choice-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--choice-hover);
}

.choice-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.choice-btn.correct {
  background: var(--correct-bg);
  border-color: var(--correct);
  color: #2E7D32;
  font-weight: 600;
  animation: correctPop 0.4s ease;
}

.choice-btn.wrong {
  background: var(--wrong-bg);
  border-color: var(--wrong);
  color: #C62828;
  animation: shake 0.4s ease;
}

.choice-btn:disabled {
  cursor: default;
  opacity: 0.85;
}

/* ========== Feedback ========== */
.quiz-feedback { margin-top: 20px; }
.quiz-feedback.hidden { display: none; }

.feedback-result {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.feedback-explanation {
  font-size: 0.9rem;
  color: var(--text-light);
  background: var(--explain-bg);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 16px;
  line-height: 1.7;
}

.next-btn {
  display: block;
  width: 100%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

/* ========== Result ========== */
.result-screen { animation: fadeIn 0.4s ease; }

.result-card {
  background: var(--card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 16px;
}

.result-emoji { font-size: 3.5rem; margin-bottom: 8px; animation: resultBounce 0.6s ease; }
.result-score { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }

.result-percentage {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.result-level { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 4px; }

.result-badge {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

.result-message {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.result-bar {
  height: 12px;
  background: var(--progress-track);
  border-radius: 6px;
  overflow: hidden;
}

.result-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 6px;
}

.result-bar-fill.result-bar-animate {
  width: var(--result-w, 0%);
  transition: width 1s ease;
}

.result-marks {
  margin-top: 16px;
  font-size: 1.3rem;
  letter-spacing: 4px;
  line-height: 1.8;
  word-break: break-all;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.action-btn {
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover { transform: translateY(-1px); }

.action-btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}

.action-btn.secondary {
  background: var(--card);
  color: var(--primary);
  border: 2px solid var(--primary);
}

.new-best {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FF9800;
  margin-bottom: 8px;
  animation: correctPop 0.5s ease;
}

/* ========== Wrong Review ========== */
.wrong-review {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.wrong-review-title { font-size: 1rem; font-weight: 700; color: var(--wrong); margin-bottom: 12px; }
.wrong-review-item { padding: 10px 0; border-bottom: 1px solid var(--divider); }
.wrong-review-item:last-child { border-bottom: none; }
.wrong-review-q { font-size: 0.9rem; color: var(--text); margin-bottom: 4px; line-height: 1.5; }
.wrong-review-a { font-size: 0.85rem; font-weight: 600; color: var(--correct); }
.wrong-review-exp { font-size: 0.8rem; color: var(--text-light); margin-top: 4px; line-height: 1.5; }

/* ========== Weak Section ========== */
.weak-section {
  margin-top: 28px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.weak-title { font-size: 1rem; font-weight: 700; margin-bottom: 12px; color: var(--wrong); }
.weak-list { list-style: none; }

.weak-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--divider);
  gap: 12px;
}

.weak-item:last-child { border-bottom: none; }
.weak-q { font-size: 0.85rem; color: var(--text); flex: 1; line-height: 1.5; }

.weak-count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--wrong);
  background: var(--wrong-bg);
  padding: 2px 8px;
  border-radius: 8px;
  white-space: nowrap;
}

.weak-clear-btn {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 10px;
  background: none;
  border: 1.5px solid #ddd;
  border-radius: 10px;
  color: var(--text-light);
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

.weak-clear-btn:hover {
  border-color: var(--wrong);
  color: var(--wrong);
}

/* ========== Share ========== */
.share-section {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
  text-align: center;
}

.share-label { font-size: 0.9rem; font-weight: 600; color: var(--text-light); margin-bottom: 12px; }
.share-buttons { display: flex; gap: 8px; }

.share-btn {
  flex: 1;
  padding: 12px 8px;
  border: none;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
  color: white;
}

.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }
.share-btn:active { transform: translateY(0); }
.share-x { background: #000; }
.share-line { background: #06C755; }
.share-copy { background: var(--primary); }

/* ========== Confetti ========== */
.confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  padding: 24px 16px;
  color: #aaa;
  font-size: 0.75rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.footer-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

.footer-link:hover { text-decoration: underline; }

.footer-links-sub {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.footer-link-sub {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-light);
}

/* ========== Noscript ========== */
.noscript-msg {
  text-align: center;
  padding: 40px 20px;
}

.noscript-msg h2 {
  margin-bottom: 12px;
}

.noscript-msg p {
  color: var(--text-light);
  line-height: 1.8;
  margin-top: 12px;
}

.noscript-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.noscript-link:hover {
  text-decoration: underline;
}

/* ========== Visually Hidden (accessible to screen readers & crawlers) ========== */
.visually-hidden,
.seo-fallback {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
  padding: 0;
  margin: -1px;
}

/* ========== Skeleton ========== */
.skeleton {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  gap: 16px;
}

.skeleton-icon {
  width: 80px;
  height: 80px;
  border-radius: 22px;
  background: var(--divider);
  animation: shimmer 1.5s ease infinite;
}

.skeleton-line {
  height: 16px;
  border-radius: 8px;
  background: var(--divider);
  animation: shimmer 1.5s ease infinite;
}

.skeleton-line-lg { width: 60%; }
.skeleton-line-sm { width: 40%; }

.skeleton-btn {
  width: 160px;
  height: 48px;
  border-radius: 24px;
  background: var(--divider);
  margin-top: 16px;
  animation: shimmer 1.5s ease infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.15; }
}

/* ========== Animations ========== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes staggerIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes splashOut {
  to { opacity: 0; transform: scale(0.95); }
}

@keyframes splashBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(108, 99, 255, 0.35); }
  50% { box-shadow: 0 4px 30px rgba(108, 99, 255, 0.55); }
}

@keyframes countdown-pop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); }
}

@keyframes correctPop {
  0% { transform: scale(1); }
  30% { transform: scale(1.08); }
  60% { transform: scale(0.97); }
  100% { transform: scale(1); }
}

@keyframes resultBounce {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.2); }
  70% { transform: scale(0.9); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ========== Responsive ========== */
@media (max-width: 480px) {
  .header h1 { font-size: 1.3rem; }
  .quiz-question { font-size: 1rem; }
  .category-grid { gap: 10px; }
  .category-card { padding: 16px 10px; }
  .choice-btn { padding: 16px; font-size: 0.95rem; min-height: 48px; }
  .next-btn { min-height: 48px; }
  .action-btn { min-height: 48px; }
  .share-buttons { flex-direction: column; }
  .share-btn { min-height: 44px; }
  .back-btn { min-height: 36px; }
  .container { padding: 16px 12px 32px; }
  .splash-icon { width: 80px; height: 80px; font-size: 2.4rem; border-radius: 22px; }
  .splash-title { font-size: 1.5rem; }
  .splash-stats { gap: 8px; font-size: 0.7rem; flex-wrap: wrap; justify-content: center; }
  .countdown-number { font-size: 4.5rem; }
}

@media (max-width: 360px) {
  .header h1 { font-size: 1.1rem; }
  .header p { font-size: 0.75rem; }
  .header-controls { top: 10px; right: 8px; gap: 4px; }
  .header-toggle { width: 30px; height: 30px; font-size: 0.85rem; }
  .category-emoji { font-size: 1.6rem; }
  .result-percentage { font-size: 2rem; }
}

@media (min-width: 768px) {
  .container { padding: 32px 24px 60px; }
  .quiz-card { padding: 32px 28px; }
  .result-card { padding: 40px 32px; }
  .share-buttons { max-width: 400px; margin: 0 auto; }
}