/**
 * FunButton Styles
 * 楽しくてワクワクするボタンスタイル
 */

.fun-button {
  /* Base styles */
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s var(--animation-bounce);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

/* Sizes */
.fun-button--small {
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
}

.fun-button--medium {
  padding: 0.75rem 1.5rem;
  font-size: var(--text-base);
}

.fun-button--large {
  padding: 1rem 2rem;
  font-size: var(--text-lg);
}

/* Primary variant - 緑の楽しいボタン */
.fun-button--primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.fun-button--primary:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

.fun-button--primary:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

/* Secondary variant - アウトラインボタン */
.fun-button--secondary {
  background: white;
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-600);
  box-shadow: var(--shadow-sm);
}

.fun-button--secondary:hover:not(:disabled) {
  background: var(--color-primary-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Accent variants - カラフルなボタン */
.fun-button--yellow {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(251, 191, 36, 0.3);
}

.fun-button--pink {
  background: linear-gradient(135deg, #f472b6 0%, #ec4899 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(244, 114, 182, 0.3);
}

.fun-button--blue {
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(96, 165, 250, 0.3);
}

.fun-button--rainbow {
  background: var(--gradient-rainbow);
  background-size: 200% 200%;
  color: white;
  animation: rainbow 3s ease infinite;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Full width */
.fun-button--full-width {
  width: 100%;
}

/* Animated state */
.fun-button--animated {
  position: relative;
}

.fun-button--animated::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.5s ease;
}

.fun-button--animated:hover::before {
  transform: translate(-50%, -50%) scale(1.5);
}

/* Icon styles */
.fun-button__icon {
  display: inline-flex;
  align-items: center;
  font-size: 1.2em;
  transition: transform 0.3s var(--animation-bounce);
}

.fun-button:hover .fun-button__icon--left {
  transform: translateX(-2px);
}

.fun-button:hover .fun-button__icon--right {
  transform: translateX(2px);
}

/* Loading state */
.fun-button--loading {
  color: transparent;
  pointer-events: none;
}

.fun-button__spinner {
  position: absolute;
  width: 1.2em;
  height: 1.2em;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Disabled state */
.fun-button--disabled,
.fun-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Ripple effect */
.fun-button__ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Fun hover variations */
.fun-button--bounce:hover:not(:disabled) {
  animation: bounce 0.5s var(--animation-bounce);
}

.fun-button--wiggle:hover:not(:disabled) {
  animation: wiggle 0.5s var(--animation-elastic);
}

.fun-button--pulse:hover:not(:disabled) {
  animation: pulse 1s var(--animation-smooth) infinite;
}

/* Emoji button special styles */
.fun-button--emoji {
  font-size: 1.5em;
  padding: 0.75rem 1.25rem;
}

.fun-button--emoji .fun-button__icon {
  font-size: 1.5em;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .fun-button--large {
    padding: 0.875rem 1.75rem;
    font-size: var(--text-base);
  }
}