.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-family: var(--font-body);
  font-weight: 700;
  border-radius: var(--radius-full); /* Pills for buttons feel more premium now */
  transition: all var(--t-normal);
  letter-spacing: 0.05em;
  font-size: 0.9rem;
  padding: 0.9rem 2rem;
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
  pointer-events: none;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--t-normal);
}
.btn:hover::after {
  opacity: 1;
}

.btn:active { transform: scale(0.96); }

/* Primary (Onyx/Deep Black) */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: rgba(255,255,255,0.1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.1);
}
.dark .btn-primary {
  background: #FAFAFA;
  color: #050505;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.15);
}

/* Secondary (Glowing Gold) */
.btn-secondary {
  background: var(--color-secondary);
  color: #050505;
  border-color: rgba(255,255,255,0.2);
  box-shadow: 0 4px 16px rgba(212,175,55,0.3), inset 0 1px 0 rgba(255,255,255,0.4);
}
.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(212,175,55,0.5), inset 0 1px 0 rgba(255,255,255,0.5);
  background: var(--color-accent);
}

/* Outline (Ghost outline) */
.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-2);
  box-shadow: none;
}
.btn-outline:hover {
  background: var(--color-surface-2);
  border-color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
  box-shadow: none;
}
.btn-ghost:hover { 
  background: var(--color-surface-2); 
  color: var(--color-text); 
}

/* Sizes */
.btn-xs { padding: 0.4rem 1rem; font-size: 0.75rem; }
.btn-sm { padding: 0.6rem 1.25rem; font-size: 0.8rem; }
.btn-md { padding: 0.9rem 2rem; }
.btn-lg { padding: 1.15rem 2.5rem; font-size: 0.95rem; }
.btn-xl { padding: 1.4rem 3.5rem; font-size: 1.05rem; }

.btn-full { width: 100%; }

/* Button loading state support if needed */
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}