/* Immortal Nexus Button Components */
/* All button variants, states, and interactive elements */

/* === BASE BUTTON STYLES === */
.btn {
  /* Core Structure */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  
  /* Sizing */
  padding: var(--space-md) var(--space-xl);
  min-height: 44px; /* Minimum touch target */
  min-width: 44px;
  
  /* Typography */
  font-family: var(--font-primary);
  font-size: var(--font-sm);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  
  /* Appearance */
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  
  /* Interactions */
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  
  /* Default state */
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn:disabled:hover {
  transform: none !important;
}

/* === BUTTON VARIANTS === */

/* Primary Button */
.btn-primary {
  background: var(--gradient-accent);
  color: var(--primary);
  box-shadow: var(--shadow-md);
  animation: pulseBtn 3s infinite ease-in-out;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  animation: none;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

/* Secondary Button */
.btn-secondary {
  background: var(--gradient-secondary);
  color: var(--text);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: var(--accent);
  transform: translateY(-1px) scale(1.02);
  box-shadow: var(--shadow-md);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover:not(:disabled) {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-glow);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.3);
}

/* Danger Button */
.btn-danger {
  background: linear-gradient(45deg, #dc267f, #bb002f);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(220, 38, 127, 0.4);
}

/* Success Button */
.btn-success {
  background: linear-gradient(45deg, #22c55e, #16a34a);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(34, 197, 94, 0.4);
}

/* === BUTTON SIZES === */
.btn-xs {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-xs);
  min-height: 32px;
  min-width: 32px;
}

.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-xs);
  min-height: 36px;
  min-width: 36px;
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-base);
  min-height: 52px;
}

.btn-xl {
  padding: var(--space-xl) var(--space-3xl);
  font-size: var(--font-lg);
  min-height: 60px;
}

/* === BUTTON SHAPES === */
.btn-round {
  border-radius: var(--radius-full);
}

.btn-square {
  border-radius: 0;
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon.btn-round {
  border-radius: var(--radius-full);
}

/* === BUTTON GROUPS === */
.btn-group {
  display: inline-flex;
  gap: 0;
}

.btn-group .btn {
  border-radius: 0;
  margin-left: -1px;
}

.btn-group .btn:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
  margin-left: 0;
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.btn-group .btn:hover {
  z-index: 1;
  position: relative;
}

/* === LOADING STATE === */
.btn-loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn-loading::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: var(--radius-full);
  animation: btnSpin 1s linear infinite;
}

.btn-loading .btn-text {
  opacity: 0;
}

/* === SPECIAL BUTTON TYPES === */

/* Mystical Button */
.btn-mystical {
  background: var(--gradient-mystical);
  color: white;
  font-family: var(--font-mystical);
  text-transform: none;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.btn-mystical::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(45deg);
  transition: var(--transition);
  opacity: 0;
}

.btn-mystical:hover::before {
  animation: shimmer 1s ease-in-out;
}

/* Floating Action Button */
.btn-fab {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  color: var(--primary);
  font-size: var(--font-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-content);
  padding: 0;
}

.btn-fab:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* === ANIMATIONS === */
@keyframes pulseBtn {
  0%, 100% { 
    box-shadow: var(--shadow-md), 0 0 10px rgba(var(--accent-rgb), 0.3); 
  }
  50% { 
    box-shadow: var(--shadow-lg), 0 0 20px rgba(var(--accent-rgb), 0.5); 
  }
}

@keyframes btnSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(45deg);
    opacity: 0;
  }
}

/* === LINK BUTTONS === */
.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  text-decoration: underline;
  text-transform: none;
  letter-spacing: normal;
  padding: var(--space-xs) 0;
  min-height: auto;
  min-width: auto;
  font-weight: var(--font-medium);
}

.btn-link:hover {
  color: var(--accent-orange);
  text-decoration: none;
  transform: none;
  box-shadow: none;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
  .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-xs);
  }
  
  .btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-sm);
    min-height: 48px;
  }
  
  .btn-xl {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--font-base);
    min-height: 52px;
  }
  
  .btn-fab {
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 48px;
    height: 48px;
    font-size: var(--font-base);
  }
  
  .btn-group {
    flex-direction: column;
    gap: var(--space-xs);
  }
  
  .btn-group .btn {
    border-radius: var(--radius-md);
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .btn-group .btn {
    width: 100%;
  }
  
  .btn-fab {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 44px;
    height: 44px;
  }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
    animation: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .btn-primary {
    animation: none;
  }
  
  .btn-mystical::before {
    transition: none;
  }
  
  .btn-mystical:hover::before {
    animation: none;
  }
}

/* Focus indicators */
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .btn {
    border: 2px solid currentColor;
  }
  
  .btn-outline {
    border-width: 3px;
  }
  
  .btn:focus-visible {
    outline-width: 3px;
  }
}

/* Dark theme adjustments */
body.light-theme .btn-primary {
  color: var(--primary);
}

body.light-theme .btn-secondary {
  background: var(--gradient-primary);
  border-color: rgba(var(--accent-rgb), 0.5);
}

body.light-theme .btn-ghost {
  color: var(--text);
}

body.light-theme .btn-ghost:hover {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
}