/* Button Components - Updated for Modern & Vintage Spec */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.4;
  border: none;
  border-radius: 999px; /* Pill shape */
  cursor: var(--cursor-pointer);
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.btn:focus {
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 2px var(--nav-bg), 0 0 0 4px var(--action-primary);
}

/* Primary Button */
.btn-primary {
  background-color: var(--action-primary);
  color: #121212; /* Dark text on gold */
  box-shadow: 0 4px 12px rgba(201, 168, 106, 0.25);
}

.btn-primary:hover {
  background-color: var(--action-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(201, 168, 106, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(201, 168, 106, 0.2);
}

/* Secondary Button */
.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--action-primary);
  color: var(--ink-dark);
}

.btn-secondary:hover {
  background-color: rgba(201, 168, 106, 0.08); /* Faint gold bg */
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
  background-color: rgba(201, 168, 106, 0.12);
}

/* Destructive Button (Danger) */
.btn-destructive {
  background-color: transparent;
  border: 1px solid var(--btn-destructive-border);
  color: var(--btn-destructive-color);
}

.btn-destructive:hover {
  background-color: var(--btn-destructive-hover-bg);
  color: var(--btn-destructive-hover-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(158, 74, 63, 0.2);
}

.btn-destructive:active {
  transform: translateY(0);
  opacity: 0.9;
}

/* Ghost Button (Neutral) */
.btn-ghost {
  background-color: transparent;
  color: var(--ui-muted);
}

.btn-ghost:hover {
  color: var(--ui-text);
  background-color: var(--ui-hover);
}

/* Icon Only Variant */
.btn-icon {
  padding: 8px;
  width: 44px;
  height: 44px;
  border-radius: 50%; /* Circular */
  color: var(--ui-muted);
  background-color: transparent;
}

.btn-icon:hover {
  background-color: var(--ui-hover);
  color: var(--ui-text);
  transform: scale(1.05);
}

.btn-icon.active {
  color: var(--action-primary);
  background-color: rgba(201, 168, 106, 0.1);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.5;
}

/* Loading State */
.btn-loading {
  opacity: 0.7;
  pointer-events: none;
  cursor: wait;
}

.btn-loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
  margin-right: 8px;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}