/**
 * 3Common Buttons — ported from @3-common/common-place ui-button component
 * https://github.com/3-Common/Libraries/blob/main/libs/common-place/src/components/button/index.vue
 *
 * 6 variants: primary, secondary, subtle, accent, danger, ghost
 * 4 sizes: sm, md (default), lg, xl
 *
 * Requires colors.css to be loaded first (uses --color-* tokens).
 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  letter-spacing: 0;
  white-space: nowrap;
  position: relative;
  cursor: pointer;
  transition: background-color 0.05s ease-out, border-color 0.05s ease-out, color 0.05s ease-out;
}

.btn[disabled],
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Click-down feedback — children nudge 1px on active */
.btn:active > * {
  transform: translateY(1px);
}

/* ── Primary — slate-900 with gradient + inset highlight ── */
.btn-primary {
  background: linear-gradient(to bottom, #293A63, var(--color-slate-900));
  border-color: var(--color-slate-900);
  color: var(--color-white);
  box-shadow: inset 0 4px 2px -2px #567BD1;
  transition: box-shadow 0.05s ease-out;
}

.btn-primary:hover {
  background: var(--color-slate-900);
  box-shadow: inset 0 4px 2px -2px rgba(86, 123, 209, 0.5);
}

.btn-primary:active {
  box-shadow: none;
}

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

/* ── Secondary (outline) — white bg, slate-200 border ── */
.btn-secondary {
  background: var(--color-white);
  border-color: var(--color-slate-200);
  color: var(--color-slate-900);
}

.btn-secondary:hover {
  background: var(--color-slate-100);
}

/* ── Subtle — slate-100 fill ── */
.btn-subtle {
  background: var(--color-slate-100);
  border-color: var(--color-slate-200);
  color: var(--color-slate-900);
}

.btn-subtle:hover {
  background: var(--color-slate-200);
  border-color: var(--color-slate-300);
}

/* ── Accent — 3Common green (use sparingly, for rare CTAs) ── */
.btn-accent {
  background: linear-gradient(to bottom, var(--color-green-400), var(--color-green-500));
  border-color: var(--color-green-600);
  color: var(--color-white);
  box-shadow: inset 0 4px 2px -2px var(--color-green-300);
  transition: box-shadow 0.05s ease-out;
}

.btn-accent:hover {
  background: var(--color-green-500);
  box-shadow: inset 0 4px 2px -2px rgba(102, 229, 178, 0.5);
}

.btn-accent:active {
  box-shadow: none;
}

/* ── Destructive — red-500, hover red-600 ── */
.btn-danger {
  background: var(--color-red-500);
  border-color: var(--color-red-500);
  color: var(--color-white);
}

.btn-danger:hover {
  background: var(--color-red-600);
  border-color: var(--color-red-600);
}

/* ── Ghost — transparent, slate-100 hover ── */
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-slate-900);
}

.btn-ghost:hover {
  background: var(--color-slate-100);
}

/* ── Sizes ── */
.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
  line-height: 20px;
  gap: 6px;
}

.btn-lg {
  padding: 6px 16px;
  font-size: 14px;
  line-height: 24px;
  gap: 10px;
}

.btn-xl {
  padding: 10px 20px;
  font-size: 14px;
  line-height: 24px;
  gap: 12px;
}

/* ── Full width ── */
.btn-full {
  display: flex;
  width: 100%;
}