/* Base button class */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-md);
  line-height: 1;
  /* Normalize line height across a and button elements */
  font-weight: var(--font-weight-semibold);
  font-family: inherit;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

/* Primary actions (Create, Add, Submit) */
.btn-primary {
  background: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-glow-accent);
  transform: translateY(-1px);
}

/* Secondary actions (Cancel, Back, Edit) */
.btn-secondary {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  box-shadow: none;
}

.btn-secondary:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

/* Danger actions (Delete) */
.btn-danger {
  background: transparent;
  color: var(--color-negative-bright);
  border: 1px solid rgba(239, 68, 68, 0.3);
  box-shadow: none;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--color-negative);
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.2);
  transform: translateY(-1px);
}

/* Small buttons (for table actions) */
.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  gap: var(--space-xs);
}

/* Icon buttons (compact table actions) */
.btn-icon {
  padding: var(--space-sm);
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  box-shadow: none;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.btn-icon.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Button groups (side-by-side actions) */
.btn-group {
  display: inline-flex;
  gap: var(--space-sm);
  align-items: center;
}

/* Form compatibility */
.btn-group form,
form[action*="method=delete"],
form[method="post"][style*="display:inline"] {
  display: inline-flex;
  margin: 0;
}

/* Touch Target Optimization for Mobile */
@media (max-width: 768px) {
  .btn {
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-lg) var(--space-xl);
  }

  .btn-sm {
    min-height: 44px;
    padding: var(--space-md) var(--space-lg);
  }

  .btn-icon {
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-md);
  }
}