/* === Variables === */
:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --border: #2a2a3a;
  --pink: #ff2d78;
  --cyan: #00e5ff;
  --gold: #ffd700;
  --text: #e8e8f0;
  --text-dim: #8888aa;
}

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

body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* === Header === */
.header {
  background: linear-gradient(135deg, var(--pink), #8b00ff, var(--cyan));
  text-align: center;
  padding: 24px 16px 18px;
}

.header-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.header-title .header-sub {
  display: block;
  font-size: 0.9rem;
  font-weight: 400;
  opacity: 0.85;
  margin-top: 2px;
}

.header-desc {
  margin-top: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.9);
  line-height: 1.5;
}

.header-desc .en {
  font-size: 0.78rem;
  opacity: 0.8;
}

/* === Game Container === */
.game-container {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

/* === Rank Section === */
.rank-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  margin-bottom: 16px;
}

.rank-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.rank-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gold);
  margin: 6px 0 10px;
  text-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
}

.rank-bar-wrap {
  background: var(--border);
  border-radius: 8px;
  height: 10px;
  overflow: hidden;
}

.rank-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--pink), var(--gold));
  border-radius: 8px;
  transition: width 0.3s ease;
}

.rank-next {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 6px;
}

/* === Tap Section === */
.tap-section {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: 24px 0;
}

.tap-button {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 4px solid var(--pink);
  background: radial-gradient(circle, #1e1e30, var(--surface));
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 30px rgba(255, 45, 120, 0.3), inset 0 0 20px rgba(255, 45, 120, 0.1);
  transition: transform 0.08s ease;
  animation: pulse 2s ease-in-out infinite;
  position: relative;
  z-index: 2;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.tap-button:active {
  transform: scale(0.9);
  animation: none;
}

.tap-button.bounce {
  animation: clickBounce 0.15s ease;
}

.tap-emoji {
  font-size: 64px;
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 30px rgba(255, 45, 120, 0.3); }
  50% { box-shadow: 0 0 50px rgba(255, 45, 120, 0.6), 0 0 80px rgba(0, 229, 255, 0.2); }
}

@keyframes clickBounce {
  0% { transform: scale(0.88); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

/* === Floating Text === */
.float-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

.float-text {
  position: absolute;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 6px rgba(0, 229, 255, 0.6);
  pointer-events: none;
  animation: floatUp 0.8s ease-out forwards;
  white-space: nowrap;
}

@keyframes floatUp {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-80px) scale(1.3);
  }
}

/* === Points Section === */
.points-section {
  text-align: center;
  margin-bottom: 20px;
}

.points-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.points-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
  margin: 4px 0;
  font-variant-numeric: tabular-nums;
}

.points-rate {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* === Shop Section === */
.shop-section {
  margin-bottom: 20px;
}

.shop-title {
  font-size: 1rem;
  text-align: center;
  margin-bottom: 12px;
  color: var(--gold);
}

.shop-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.upgrade-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s, opacity 0.2s;
}

.upgrade-card:hover {
  border-color: var(--cyan);
}

.upgrade-card:active {
  transform: scale(0.97);
}

.upgrade-card.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.upgrade-card.disabled:hover {
  border-color: var(--border);
}

.upgrade-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  text-align: center;
}

.upgrade-info {
  flex: 1;
  min-width: 0;
}

.upgrade-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}

.upgrade-name .en {
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 4px;
}

.upgrade-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.upgrade-owned {
  font-size: 0.7rem;
  color: var(--cyan);
  margin-top: 2px;
}

.upgrade-cost {
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--pink), #cc0055);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 8px;
  white-space: nowrap;
}

.upgrade-card.disabled .upgrade-cost {
  background: var(--border);
  color: var(--text-dim);
}

/* === Share === */
.share-section {
  text-align: center;
  margin-bottom: 16px;
}

.share-btn {
  background: #1da1f2;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.share-btn:hover {
  background: #0d8ecf;
}

/* === Patreon CTA === */
.patreon-section {
  margin-bottom: 16px;
}

.patreon-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #ff424d, #f96854);
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  padding: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.patreon-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 66, 77, 0.4);
}

.patreon-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.patreon-cta strong {
  font-size: 0.95rem;
}

.patreon-cta .en {
  font-size: 0.78rem;
  opacity: 0.85;
}

/* === How to Play === */
.howto-section {
  margin-bottom: 20px;
}

.howto-details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.howto-summary {
  padding: 14px 16px;
  font-weight: 700;
  cursor: pointer;
  color: var(--gold);
  font-size: 0.95rem;
  list-style: none;
}

.howto-summary::-webkit-details-marker {
  display: none;
}

.howto-summary::before {
  content: '▶ ';
  font-size: 0.75rem;
}

.howto-details[open] .howto-summary::before {
  content: '▼ ';
}

.howto-body {
  padding: 0 16px 16px;
}

.howto-body ol {
  padding-left: 20px;
  line-height: 1.8;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.howto-body .en {
  font-size: 0.78rem;
  opacity: 0.7;
}

/* === Footer === */
.footer {
  text-align: center;
  padding: 16px;
  font-size: 0.75rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

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

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

/* === Responsive === */
@media (min-width: 600px) {
  .tap-button {
    width: 200px;
    height: 200px;
  }
  .tap-emoji {
    font-size: 80px;
  }
  .points-value {
    font-size: 3.5rem;
  }
}

/* === Rank Up Animation === */
.rank-up-flash {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.3), transparent 70%);
  pointer-events: none;
  z-index: 100;
  animation: flashFade 1s ease-out forwards;
}

@keyframes flashFade {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* === .en helper === */
.en {
  font-style: normal;
}