/* 
 * Button Styles
 * Modern glass-morphism button components
 */

/* ===== Base Button ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  color: var(--text-primary);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.8);
  box-shadow: var(--glass-shadow);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 
    var(--glass-shadow),
    0 0 20px rgba(255, 255, 255, 0.1);
  border-color: var(--border-strong);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--glass-shadow);
}

.btn:focus-visible {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

/* ===== Button Variants ===== */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  border-color: var(--primary-400);
  color: var(--text-primary);
  box-shadow: 
    var(--glass-shadow),
    0 0 20px rgba(14, 165, 233, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-400));
  border-color: var(--primary-300);
  box-shadow: 
    var(--glass-shadow),
    0 0 30px rgba(14, 165, 233, 0.4);
}

.btn-success {
  background: linear-gradient(135deg, rgba(80, 250, 123, 0.2), rgba(80, 250, 123, 0.1));
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.btn-success:hover {
  background: linear-gradient(135deg, rgba(80, 250, 123, 0.3), rgba(80, 250, 123, 0.2));
  box-shadow: 
    var(--glass-shadow),
    0 0 20px rgba(80, 250, 123, 0.3);
}

.btn-danger {
  background: linear-gradient(135deg, rgba(255, 85, 85, 0.2), rgba(255, 85, 85, 0.1));
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.btn-danger:hover {
  background: linear-gradient(135deg, rgba(255, 85, 85, 0.3), rgba(255, 85, 85, 0.2));
  box-shadow: 
    var(--glass-shadow),
    0 0 20px rgba(255, 85, 85, 0.3);
}

.btn-warning {
  background: linear-gradient(135deg, rgba(241, 250, 140, 0.2), rgba(241, 250, 140, 0.1));
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
}

.btn-warning:hover {
  background: linear-gradient(135deg, rgba(241, 250, 140, 0.3), rgba(241, 250, 140, 0.2));
  box-shadow: 
    var(--glass-shadow),
    0 0 20px rgba(241, 250, 140, 0.3);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--glass-bg);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

/* ===== Button Sizes ===== */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-xl);
  border-radius: var(--radius-2xl);
}

/* ===== Button States ===== */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: var(--glass-shadow) !important;
}

.btn.loading {
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  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: 50%;
  animation: spin 1s linear infinite;
}

/* ===== Special Buttons ===== */
.btn-close {
  padding: var(--space-2);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.btn-close:hover {
  background: rgba(255, 85, 85, 0.2);
  color: var(--accent-red);
  transform: scale(1.1);
}

.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  aspect-ratio: 1;
}

.btn-icon-sm {
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

.btn-icon-lg {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
}

/* ===== Game Specific Buttons ===== */
.game-button {
  min-width: 200px;
  margin-bottom: var(--space-4);
}

.next-turn-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  background: transparent;
  border: 2px solid currentColor;
  color: inherit;
  transition: all var(--transition-fast);
}

.next-turn-btn:hover {
  transform: translateY(-2px) scale(1.05);
  background: rgba(255, 255, 255, 0.1);
}

.next-turn-btn:active {
  transform: translateY(0);
}

/* ===== Button Groups ===== */
.btn-group {
  display: flex;
  gap: var(--space-2);
}

.btn-group .btn {
  flex: 1;
}

.btn-group-vertical {
  flex-direction: column;
}

.btn-group-vertical .btn {
  margin-bottom: 0;
}

/* ===== Animations ===== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-glow {
  0%, 100% { 
    box-shadow: 
      var(--glass-shadow),
      0 0 5px currentColor;
  }
  50% { 
    box-shadow: 
      var(--glass-shadow),
      0 0 20px currentColor,
      0 0 30px currentColor;
  }
}

.btn-pulse {
  animation: pulse-glow 2s ease-in-out infinite;
}