/* ============================================
   Unified Button System — colours via variables.css
   ============================================ */

.btn {
  -webkit-appearance: none;
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  box-sizing: border-box;
  transition: background 0.15s, box-shadow 0.15s, border-color 0.15s, opacity 0.15s;
}

/* Modifiers */
.btn--full { display: flex; width: 100%; }
.btn--pill { border-radius: 999px; }
.btn--sm   { padding: 0.45rem 0.9rem; font-size: 0.85rem; }
.btn--lg   { padding: 0.85rem 1.75rem; font-size: 1rem; }

/* Variants */
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover  { background: var(--color-primary-dark); box-shadow: 0 4px 14px rgba(25,118,210,0.3); }
.btn--primary:active { background: var(--color-primary-darker); }

.btn--success {
  background: var(--color-success);
  color: #fff;
}
.btn--success:hover  { background: var(--color-success-dark); }
.btn--success:active { background: #145214; }

.btn--outline {
  background: var(--color-bg-card);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--outline:hover  { background: var(--color-primary-light); }
.btn--outline:active { background: var(--color-primary-faint); }

.btn--ghost {
  background: none;
  color: var(--color-danger);
  padding-left: 0;
  padding-right: 0;
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: underline;
  border: none;
}
.btn--ghost:hover { color: var(--color-danger-dark); }

.btn--disabled {
  background: var(--color-bg-faint);
  color: var(--color-text-placeholder);
  cursor: default;
  pointer-events: none;
}