/* ===== Muscle Quiz - style.css ===== */

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --surface2: #1e1e2e;
  --pink: #ff2d78;
  --cyan: #00e5ff;
  --gold: #ffd700;
  --text: #eee;
  --text-sub: #999;
  --correct: #00e676;
  --wrong: #ff3d3d;
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hidden { display: none !important; }

/* Header */
.header {
  width: 100%;
  text-align: center;
  padding: 16px 12px 8px;
  background: linear-gradient(180deg, rgba(255,45,120,0.12) 0%, transparent 100%);
}
.header .brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--pink);
  text-shadow: 0 0 12px rgba(255,45,120,0.5);
  letter-spacing: 2px;
}
.header h1 {
  font-size: 1.6rem;
  margin: 4px 0 2px;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header .subtitle-en {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* Container */
.container {
  width: 100%;
  max-width: 520px;
  padding: 0 16px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Start Screen */
#start-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  text-align: center;
}
.start-icon {
  font-size: 4rem;
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}
.start-desc {
  line-height: 1.7;
  color: var(--text-sub);
  font-size: 0.95rem;
}
.start-desc .ja { display: block; margin-bottom: 4px; }
.start-desc .en { font-size: 0.82rem; color: #777; }

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--pink), #c2185b);
  color: #fff;
  border: none;
  padding: 14px 40px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(255,45,120,0.4);
  transition: all 0.2s;
  letter-spacing: 1px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(255,45,120,0.6);
}
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  background: var(--surface2);
  color: var(--cyan);
  border: 1px solid var(--cyan);
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: rgba(0,229,255,0.1);
  box-shadow: 0 0 12px rgba(0,229,255,0.3);
}

/* Quiz Screen */
#quiz-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 8px;
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
  transition: width 0.4s ease;
  border-radius: 3px;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-sub);
}
.quiz-header .score-display {
  color: var(--cyan);
  font-weight: 700;
}

/* Question */
.question-card {
  background: var(--surface);
  border: 1px solid rgba(255,45,120,0.2);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.question-ja {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 8px;
}
.question-en {
  font-size: 0.82rem;
  color: var(--text-sub);
  line-height: 1.4;
}

/* Choices */
.choices {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.choice-btn {
  background: var(--surface2);
  border: 2px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
  font-size: 1rem;
}
.choice-btn:hover:not(:disabled) {
  border-color: var(--cyan);
  background: rgba(0,229,255,0.06);
  transform: translateX(4px);
}
.choice-btn .choice-ja {
  display: block;
  font-weight: 600;
}
.choice-btn .choice-en {
  display: block;
  font-size: 0.78rem;
  color: var(--text-sub);
  margin-top: 2px;
}
.choice-btn.correct {
  border-color: var(--correct);
  background: rgba(0,230,118,0.12);
  animation: correctPop 0.3s ease;
}
.choice-btn.wrong {
  border-color: var(--wrong);
  background: rgba(255,61,61,0.12);
  animation: shake 0.4s ease;
}
@keyframes correctPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Explanation */
.explanation-box {
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.explanation-box.correct-exp {
  background: rgba(0,230,118,0.08);
  border: 1px solid rgba(0,230,118,0.3);
}
.explanation-box.wrong-exp {
  background: rgba(255,61,61,0.08);
  border: 1px solid rgba(255,61,61,0.3);
}
.result-label {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.explanation-ja {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 4px;
}
.explanation-en {
  font-size: 0.78rem;
  color: var(--text-sub);
  line-height: 1.4;
}

/* Next Button */
#next-btn {
  margin-top: auto;
  align-self: center;
  min-width: 200px;
}

/* Reward Overlay */
.reward-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.reward-overlay.show {
  opacity: 1;
  pointer-events: auto;
}
.reward-text {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--gold);
  text-shadow: 0 0 20px rgba(255,215,0,0.6);
  margin-bottom: 16px;
  animation: rewardBounce 0.5s ease;
}
@keyframes rewardBounce {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
.reward-img {
  max-width: 280px;
  max-height: 50vh;
  border-radius: var(--radius);
  border: 3px solid var(--pink);
  box-shadow: 0 0 40px rgba(255,45,120,0.5);
  animation: rewardBounce 0.5s ease 0.1s both;
}

/* Result Screen */
#result-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding-top: 16px;
  text-align: center;
}
.result-emoji {
  font-size: 4rem;
  animation: pulse 1.5s ease-in-out infinite;
}
.result-title-ja {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-title-en {
  font-size: 1rem;
  color: var(--text-sub);
  margin-top: -8px;
}
.result-score {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
}

/* Gallery */
.gallery-label {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-top: 8px;
}
.result-gallery {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  width: 100%;
  max-width: 400px;
}
.gallery-item {
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid transparent;
}
.gallery-item.unlocked {
  border-color: var(--pink);
  box-shadow: 0 0 10px rgba(255,45,120,0.3);
}
.gallery-item.unlocked img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.gallery-item.locked {
  background: var(--surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-color: rgba(255,255,255,0.05);
}
.lock-icon {
  font-size: 1.2rem;
  opacity: 0.4;
}

/* Result buttons */
.result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

/* Patreon CTA */
.patreon-cta {
  display: block;
  margin-top: 16px;
  padding: 14px 24px;
  background: linear-gradient(135deg, #ff424d, #f96854);
  color: #fff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  text-align: center;
  box-shadow: 0 4px 16px rgba(249,104,84,0.4);
  transition: all 0.2s;
}
.patreon-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(249,104,84,0.6);
}
.patreon-cta .cta-en {
  font-size: 0.78rem;
  opacity: 0.85;
  display: block;
}

/* Footer */
.footer {
  text-align: center;
  padding: 20px 12px;
  font-size: 0.75rem;
  color: #555;
}
.footer a { color: var(--pink); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Mobile tweaks */
@media (max-width: 400px) {
  .header h1 { font-size: 1.3rem; }
  .question-ja { font-size: 1.05rem; }
  .result-gallery { grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .reward-img { max-width: 240px; }
}