/* ===========================
 * Button Component Styles
 * ===========================
 * Sizes: xs (24px), sm (32px), md (40px default), lg (48px), xl (56px)
 * Hierarchy: primary, secondary-gray, secondary-color,
 *            tertiary-gray, tertiary-color, link-gray, link-color
 * States: default, hover, focus-visible, active, disabled
 * Variants: with icons, icon-only, loading
 * ===========================
 * Dark mode handled by CSS custom properties via data-theme attribute
 * =========================== */


/* ─── 1. Base Button ─── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-family, 'Inter', system-ui, -apple-system, sans-serif);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease-in-out;
  user-select: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  box-sizing: border-box;
  /* md size defaults */
  height: 40px;
  font-size: 16px;
  line-height: 24px;
  padding: 0 16px;
  border-radius: 8px;
}

.btn:focus {
  outline: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn:disabled {
  cursor: not-allowed;
}


/* ─── 2. Size System ─── */

/* xs — 24px height */
.btn.btn-xs {
  height: 24px;
  font-size: 12px;
  line-height: 16px;
  padding: 0 8px;
  border-radius: 6px;
  gap: 4px;
}

/* sm — 32px height */
.btn.btn-sm {
  height: 32px;
  font-size: 14px;
  line-height: 20px;
  padding: 0 12px;
  border-radius: 6px;
  gap: 4px;
}

/* md — 40px height (default, no class needed) */

/* lg — 48px height */
.btn.btn-lg {
  height: 48px;
  font-size: 16px;
  line-height: 24px;
  padding: 0 18px;
  border-radius: 8px;
  gap: 6px;
}

/* xl — 56px height */
.btn.btn-xl {
  height: 56px;
  font-size: 18px;
  line-height: 28px;
  padding: 0 24px;
  border-radius: 8px;
  gap: 6px;
}


/* ─── 3. Icon Sizing ─── */

.btn .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: currentColor;
}

.btn .btn-text {
  display: inline-block;
  white-space: nowrap;
}

/* Spacing handled by gap — reset legacy margins */
.btn .btn-icon-left,
.btn .btn-icon-right {
  margin: 0;
}

/* Icon sizes per button size */
.btn.btn-xs .btn-icon { width: 16px; height: 16px; }
.btn.btn-sm .btn-icon { width: 16px; height: 16px; }
/* md: default 20px */
.btn.btn-lg .btn-icon { width: 20px; height: 20px; }
.btn.btn-xl .btn-icon { width: 24px; height: 24px; }


/* ─── 4. Icon-Only Variant ─── */

.btn.btn-icon-only {
  padding: 0;
  width: 40px;
  min-width: 40px;
}

.btn.btn-xs.btn-icon-only { width: 24px; min-width: 24px; }
.btn.btn-sm.btn-icon-only { width: 32px; min-width: 32px; }
/* md: default 40px */
.btn.btn-lg.btn-icon-only { width: 48px; min-width: 48px; }
.btn.btn-xl.btn-icon-only { width: 56px; min-width: 56px; }


/* ─── 5. Hierarchy Styles ─── */

/* ── 5a. Primary ── */

.btn-primary {
  background-color: var(--bg-brand-solid, #6E87CF);
  color: var(--fg-white, #FFFFFF);
  border-color: transparent;
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-primary:hover:not(:disabled),
.btn-primary.btn-hover {
  background-color: var(--bg-brand-solid-hover, #4E659E);
  box-shadow: 0px 1px 3px rgba(16, 24, 40, 0.1);
}

.btn-primary:focus-visible,
.btn-primary.btn-focused {
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn-primary:active:not(:disabled),
.btn-primary.btn-active {
  background-color: var(--bg-brand-solid-hover, #4E659E);
  color: var(--brand-100, #E9EFFE);
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-primary:disabled {
  background-color: var(--bg-disabled, #F2F4F8);
  color: var(--fg-disabled, #98A2B3);
  border-color: transparent;
  box-shadow: none;
}


/* ── 5b. Secondary Gray ── */

.btn-secondary-gray {
  background-color: var(--bg-primary, #FFFFFF);
  color: var(--fg-secondary, #344054);
  border-color: var(--border-secondary, #E4E7EC);
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-secondary-gray:hover:not(:disabled),
.btn-secondary-gray.btn-hover {
  background-color: var(--bg-secondary-hover, #F2F4F8);
  color: var(--fg-secondary-hover, #18222F);
  border-color: var(--border-secondary, #E4E7EC);
  box-shadow: 0px 1px 3px rgba(16, 24, 40, 0.1);
}

.btn-secondary-gray:focus-visible,
.btn-secondary-gray.btn-focused {
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn-secondary-gray:active:not(:disabled),
.btn-secondary-gray.btn-active {
  background-color: var(--bg-brand-primary-alt);
  color: var(--fg-secondary-hover, #18222F);
  border-color: var(--brand-400, #ADC1F9);
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-secondary-gray:disabled {
  background-color: var(--bg-primary, #FFFFFF);
  color: var(--fg-disabled, #98A2B3);
  border-color: var(--border-disabled, #D0D5DD);
  box-shadow: none;
}


/* ── 5c. Secondary Color ── */

.btn-secondary-color {
  background-color: var(--bg-primary, #FFFFFF);
  color: var(--brand-700, #4E659E);
  border-color: var(--brand-300, #C9D5FB);
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-secondary-color:hover:not(:disabled),
.btn-secondary-color.btn-hover {
  background-color: var(--bg-brand-primary, #E9EFFE);
  color: var(--brand-800, #32446E);
  border-color: var(--brand-300, #C9D5FB);
  box-shadow: 0px 1px 3px rgba(16, 24, 40, 0.1);
}

.btn-secondary-color:focus-visible,
.btn-secondary-color.btn-focused {
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn-secondary-color:active:not(:disabled),
.btn-secondary-color.btn-active {
  background-color: var(--brand-50, #F6F8FE);
  color: var(--brand-700, #4E659E);
  border-color: var(--brand-500, #92ACF7);
  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
}

.btn-secondary-color:disabled {
  background-color: var(--bg-primary, #FFFFFF);
  color: var(--fg-disabled, #98A2B3);
  border-color: var(--border-secondary, #E4E7EC);
  box-shadow: none;
}

/* Secondary Color — dark mode overrides
 * This button uses brand-colored surfaces in dark mode (not neutral),
 * so we need component-level overrides with inverted brand primitives. */
[data-theme="dark"] .btn-secondary-color {
  background-color: var(--brand-900, #19253D);
  color: var(--brand-300, #C9D5FB);
  border-color: var(--brand-800, #32446E);
}

[data-theme="dark"] .btn-secondary-color:hover:not(:disabled),
[data-theme="dark"] .btn-secondary-color.btn-hover {
  background-color: var(--brand-800, #32446E);
  color: var(--brand-200, #D9E2FC);
  border-color: var(--brand-700, #4E659E);
}

[data-theme="dark"] .btn-secondary-color:active:not(:disabled),
[data-theme="dark"] .btn-secondary-color.btn-active {
  background-color: var(--brand-950, #05070D);
  color: var(--brand-100, #E9EFFE);
  border-color: var(--brand-800, #32446E);
}

[data-theme="dark"] .btn-secondary-color:disabled {
  background-color: var(--bg-primary);
  color: var(--fg-disabled);
  border-color: var(--border-secondary);
}


/* ── 5d. Tertiary Gray ── */

.btn-tertiary-gray {
  background-color: transparent;
  color: var(--fg-tertiary, #475467);
  border-color: transparent;
}

.btn-tertiary-gray:hover:not(:disabled),
.btn-tertiary-gray.btn-hover {
  background-color: var(--brand-50, #F6F8FE);
  color: var(--brand-700, #4E659E);
}

.btn-tertiary-gray:focus-visible,
.btn-tertiary-gray.btn-focused {
  background-color: var(--bg-primary, #FFFFFF);
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn-tertiary-gray:active:not(:disabled),
.btn-tertiary-gray.btn-active {
  background-color: var(--brand-50, #F6F8FE);
  color: var(--fg-primary, #101928);
  border-color: var(--brand-400, #ADC1F9);
}

.btn-tertiary-gray:disabled {
  color: var(--fg-disabled, #98A2B3);
  background-color: transparent;
}

/* Tertiary Gray – dark-mode component overrides */
[data-theme="dark"] .btn-tertiary-gray {
  color: #ECECED;
}

[data-theme="dark"] .btn-tertiary-gray:hover:not(:disabled),
[data-theme="dark"] .btn-tertiary-gray.btn-hover {
  background-color: #1F242F;
  color: var(--brand-300, #C9D5FB);
}

[data-theme="dark"] .btn-tertiary-gray:active:not(:disabled),
[data-theme="dark"] .btn-tertiary-gray.btn-active {
  background-color: var(--brand-900, #19253D);
  color: #F0F1F1;
  border-color: var(--brand-700, #4E659E);
}

[data-theme="dark"] .btn-tertiary-gray:disabled {
  color: #85888E;
  background-color: transparent;
}


/* ── 5e. Tertiary Color ── */

.btn-tertiary-color {
  background-color: transparent;
  color: var(--brand-700, #4E659E);
  border-color: transparent;
}

.btn-tertiary-color:hover:not(:disabled),
.btn-tertiary-color.btn-hover {
  background-color: var(--bg-brand-primary, #E9EFFE);
  color: var(--brand-800, #32446E);
}

.btn-tertiary-color:focus-visible,
.btn-tertiary-color.btn-focused {
  background-color: var(--bg-primary, #FFFFFF);
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
}

.btn-tertiary-color:active:not(:disabled),
.btn-tertiary-color.btn-active {
  background-color: var(--brand-50, #F6F8FE);
  color: var(--brand-700, #4E659E);
  border-color: var(--brand-500, #92ACF7);
}

.btn-tertiary-color:disabled {
  color: var(--fg-disabled, #98A2B3);
  background-color: transparent;
}

/* Tertiary Color – dark-mode component overrides */
[data-theme="dark"] .btn-tertiary-color {
  color: var(--brand-300, #C9D5FB);
}

[data-theme="dark"] .btn-tertiary-color:hover:not(:disabled),
[data-theme="dark"] .btn-tertiary-color.btn-hover {
  color: #E9EEFD;
}

[data-theme="dark"] .btn-tertiary-color:active:not(:disabled),
[data-theme="dark"] .btn-tertiary-color.btn-active {
  background-color: var(--brand-900, #19253D);
  color: var(--brand-300, #C9D5FB);
  border-color: var(--brand-800, #32446E);
}

[data-theme="dark"] .btn-tertiary-color:disabled {
  color: #85888E;
  background-color: transparent;
}


/* ── 5f. Link Gray ── */

.btn.btn-link-gray {
  background-color: transparent;
  color: var(--fg-tertiary, #475467);
  padding: 0;
  height: auto;
  min-width: auto;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.btn-link-gray:hover:not(:disabled),
.btn-link-gray.btn-hover {
  background-color: var(--brand-50, #F6F8FE);
  color: var(--brand-700, #4E659E);
}

.btn-link-gray:focus-visible,
.btn-link-gray.btn-focused {
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
  border-radius: 2px;
}

.btn-link-gray:disabled {
  color: var(--fg-disabled, #98A2B3);
}

/* Link Gray – dark-mode component overrides */
[data-theme="dark"] .btn-link-gray {
  color: #ECECED;
}

[data-theme="dark"] .btn-link-gray:hover:not(:disabled),
[data-theme="dark"] .btn-link-gray.btn-hover {
  background-color: #1F242F;
  color: var(--brand-300, #C9D5FB);
}

[data-theme="dark"] .btn-link-gray:disabled {
  color: #85888E;
}


/* ── 5g. Link Color ── */

.btn.btn-link-color {
  background-color: transparent;
  color: var(--brand-700, #4E659E);
  padding: 0;
  height: auto;
  min-width: auto;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.btn-link-color:hover:not(:disabled),
.btn-link-color.btn-hover {
  background-color: var(--bg-brand-primary, #E9EFFE);
  color: var(--brand-800, #32446E);
}

.btn-link-color:focus-visible,
.btn-link-color.btn-focused {
  box-shadow: 0 0 0 2px var(--bg-primary, #FFFFFF), 0 0 0 4px var(--brand-500, #92ACF7);
  border-radius: 2px;
}

.btn-link-color:disabled {
  color: var(--fg-disabled, #98A2B3);
}

/* Link Color – dark-mode component overrides */
[data-theme="dark"] .btn-link-color {
  color: var(--brand-300, #C9D5FB);
}

[data-theme="dark"] .btn-link-color:hover:not(:disabled),
[data-theme="dark"] .btn-link-color.btn-hover {
  background-color: var(--brand-800, #32446E);
  color: #E9EEFD;
}

[data-theme="dark"] .btn-link-color:disabled {
  color: #85888E;
}


/* Link button icon sizing — smaller icons for inline links */
.btn.btn-link-gray .btn-icon,
.btn.btn-link-color .btn-icon {
  width: 16px;
  height: 16px;
}

/* Link buttons with size classes — keep auto height but inherit font/icon size */
.btn.btn-link-gray.btn-xs,
.btn.btn-link-color.btn-xs,
.btn.btn-link-gray.btn-sm,
.btn.btn-link-color.btn-sm,
.btn.btn-link-gray.btn-lg,
.btn.btn-link-color.btn-lg,
.btn.btn-link-gray.btn-xl,
.btn.btn-link-color.btn-xl {
  height: auto;
  padding: 0;
  min-width: auto;
  border: none;
  border-radius: 0;
}


/* ─── 6. Demo State Classes ─── */

.btn-hover,
.btn-focused,
.btn-active {
  pointer-events: none;
}


/* ─── 7. Loading State ─── */

.btn-loading {
  position: relative;
  cursor: default;
  pointer-events: none;
}

.btn-loading .btn-text,
.btn-loading .btn-icon {
  visibility: hidden;
}

.btn-loading::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-top: -10px;
  margin-left: -10px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  animation: btn-spin 0.8s linear infinite;
}

/* Smaller spinner for xs and sm buttons */
.btn-xs.btn-loading::after,
.btn-sm.btn-loading::after {
  width: 14px;
  height: 14px;
  margin-top: -7px;
  margin-left: -7px;
}

/* Dark spinner for non-primary buttons */
.btn-secondary-gray.btn-loading::after,
.btn-secondary-color.btn-loading::after,
.btn-tertiary-gray.btn-loading::after,
.btn-tertiary-color.btn-loading::after,
.btn-link-gray.btn-loading::after,
.btn-link-color.btn-loading::after {
  border: 2px solid rgba(52, 64, 84, 0.3);
  border-top-color: var(--fg-secondary, #344054);
}

@keyframes btn-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}


/* ─── 8. Button Group ─── */

.btn-group {
  display: inline-flex;
}

.btn-group .btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

.btn-group .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}


/* ─── 9. Component Display Styles (Documentation Pages) ─── */

.component-example {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 16px;
  min-width: 160px;
  padding: 24px;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.component-states-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 24px 0;
}

.component-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.component-state-title {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--text-secondary, #667085);
}

.specs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 24px 0;
}

.spec-item {
  background-color: var(--bg-secondary);
  padding: 16px;
  border-radius: 8px;
}

.spec-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.spec-value {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 4px 0;
}

.color-preview {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  margin: 8px 0;
  border: 1px solid var(--border-secondary);
}

.code-block {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
}

.usage-list {
  list-style-type: disc;
  padding-left: 24px;
  margin: 16px 0;
}

.usage-list li {
  margin-bottom: 8px;
  line-height: 1.5;
  font-size: 14px;
  color: var(--text-secondary);
}