/* ============================================================
   Components — reusable UI primitives
   ============================================================ */

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  height: 38px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn svg { width: 16px; height: 16px; }

.btn--primary {
  background: var(--gradient-brand);
  color: var(--text-on-brand);
  box-shadow: var(--shadow-brand);
}
.btn--primary:hover { filter: brightness(1.08); box-shadow: var(--shadow-brand), var(--shadow-sm); }

.btn--secondary {
  background: var(--bg-surface-raised);
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn--secondary:hover { background: var(--bg-hover); }

.btn--ghost { background: transparent; color: var(--text-secondary); }
.btn--ghost:hover { background: var(--bg-hover); color: var(--text-primary); }

.btn--danger { background: var(--red-500); color: #fff; }
.btn--danger:hover { filter: brightness(1.08); }

.btn--sm { height: 30px; padding: 0 var(--space-3); font-size: var(--text-sm); }

/* Icon-only button */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  flex-shrink: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  transition: background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn svg { width: 20px; height: 20px; }

.icon-btn__dot {
  position: absolute;
  top: 9px; right: 9px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gradient-brand);
  box-shadow: 0 0 0 2px var(--bg-app);
}

/* ============================================================
   Cards — glass surface with gradient hairline border
   ============================================================ */
.card {
  position: relative;
  background: var(--bg-surface);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
/* gradient hairline via mask compositing */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient-border);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}
.card--hover:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.card__body { padding: var(--space-5); }
.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}
.card__title { font-size: var(--text-md); font-weight: var(--weight-semibold); }

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  line-height: 1.6;
}
.badge--info     { background: var(--info-bg);     color: var(--text-brand); }
.badge--positive { background: var(--positive-bg); color: var(--positive); }
.badge--warning  { background: var(--warning-bg);  color: var(--warning); }
.badge--negative { background: var(--negative-bg); color: var(--negative); }
.badge--neutral  { background: var(--bg-hover);    color: var(--text-secondary); }

/* ============================================================
   Global search
   ============================================================ */
.search {
  position: relative;
  display: flex;
  align-items: center;
  width: min(360px, 34vw);
}
.search__icon {
  position: absolute;
  left: var(--space-3);
  width: 16px; height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}
.search__input {
  width: 100%;
  height: 38px;
  padding: 0 76px 0 38px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}
.search__input::placeholder { color: var(--text-muted); }
.search__input:focus {
  outline: none;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px rgba(46, 107, 255, 0.18);
}
.search__kbd {
  position: absolute;
  right: var(--space-2);
  display: flex;
  gap: 2px;
}

.kbd {
  padding: 1px 6px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--bg-surface-raised);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ============================================================
   Dropdown / context menus
   ============================================================ */
.dropdown-anchor { position: relative; display: inline-flex; }

/*
 * .menu is portaled to #dropdown-root (see components/dropdown.js) and
 * positioned with inline `top`/`left` computed from the trigger's live
 * bounding rect — never `position: absolute` relative to an ancestor.
 * That's what lets it escape any clipping ancestor (accordion body, card,
 * scrolling <main>) instead of being cropped by the first one it meets.
 */
.menu {
  position: fixed;
  min-width: 224px;
  max-height: calc(100vh - 16px);
  overflow-y: auto;
  padding: var(--space-2);
  background: var(--bg-surface-solid);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  transform-origin: top right;
  animation: menu-pop var(--dur-fast) var(--ease-spring) both;
}
.menu.menu--flip-up { transform-origin: bottom right; }
@keyframes menu-pop {
  from { opacity: 0; transform: scale(0.96) translateY(-4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.menu__header {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-2);
}
.menu__title { font-weight: var(--weight-semibold); font-size: var(--text-base); }
.menu__subtitle { font-size: var(--text-sm); color: var(--text-muted); }

.menu__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--text-base);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.menu__item:hover, .menu__item:focus-visible { background: var(--bg-hover); color: var(--text-primary); }
.menu__item svg { width: 16px; height: 16px; flex-shrink: 0; }
.menu__item--danger { color: var(--negative); }
.menu__item--danger:hover { background: var(--negative-bg); color: var(--negative); }

.menu__separator { height: 1px; margin: var(--space-2) 0; background: var(--border-subtle); }

.menu__empty {
  padding: var(--space-4) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: center;
}

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: var(--space-4);
  background: var(--bg-scrim);
  backdrop-filter: blur(6px);
  animation: fade-in var(--dur-base) var(--ease-out) both;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.modal {
  width: min(520px, 100%);
  max-height: min(80vh, 720px);
  display: flex;
  flex-direction: column;
  background: var(--bg-surface-solid);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: modal-enter var(--dur-base) var(--ease-spring) both;
}
@keyframes modal-enter {
  from { opacity: 0; transform: scale(0.94) translateY(16px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5) var(--space-3);
}
.modal__body { padding: var(--space-2) var(--space-5) var(--space-4); overflow-y: auto; }
.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.modal-overlay.is-closing { animation: fade-out var(--dur-fast) var(--ease-out) both; }
.modal-overlay.is-closing .modal { animation: modal-exit var(--dur-fast) var(--ease-out) both; }
@keyframes fade-out { to { opacity: 0; } }
@keyframes modal-exit { to { opacity: 0; transform: scale(0.96) translateY(8px); } }

/* ============================================================
   Toasts
   ============================================================ */
.toast-region {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  width: min(380px, calc(100vw - 32px));
  padding: var(--space-3) var(--space-4);
  background: var(--bg-surface-raised);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-enter var(--dur-base) var(--ease-spring) both;
}
@keyframes toast-enter {
  from { opacity: 0; transform: translateX(24px) scale(0.97); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
.toast.is-leaving { animation: toast-exit var(--dur-base) var(--ease-out) both; }
@keyframes toast-exit { to { opacity: 0; transform: translateX(24px) scale(0.97); } }

.toast__icon { width: 20px; height: 20px; flex-shrink: 0; margin-top: 1px; }
.toast--success .toast__icon { color: var(--positive); }
.toast--error   .toast__icon { color: var(--negative); }
.toast--info    .toast__icon { color: var(--text-brand); }
.toast--warning .toast__icon { color: var(--warning); }

.toast__content { flex: 1; min-width: 0; }
.toast__title { font-weight: var(--weight-semibold); font-size: var(--text-base); }
.toast__message { font-size: var(--text-sm); color: var(--text-secondary); margin-top: 1px; }

.toast__close {
  border: none; background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: var(--radius-sm);
}
.toast__close:hover { color: var(--text-primary); background: var(--bg-hover); }
.toast__close svg { width: 14px; height: 14px; }

/* ============================================================
   Loading skeletons
   ============================================================ */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--skeleton-base);
  border-radius: var(--radius-sm);
}
.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, var(--skeleton-sheen), transparent);
  animation: skeleton-sheen 1.6s var(--ease-out) infinite;
}
@keyframes skeleton-sheen { to { transform: translateX(100%); } }

.skeleton--text  { height: 12px; }
.skeleton--title { height: 20px; width: 55%; }
.skeleton--circle { border-radius: 50%; }

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumbs { display: flex; align-items: center; gap: var(--space-2); min-width: 0; }
.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  color: var(--text-muted);
  white-space: nowrap;
}
.breadcrumbs__item svg { width: 14px; height: 14px; color: var(--text-muted); opacity: .6; }
.breadcrumbs__link {
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 2px 4px;
  transition: color var(--dur-fast) var(--ease-out);
}
.breadcrumbs__link:hover { color: var(--text-primary); text-decoration: none; }
.breadcrumbs__current { color: var(--text-primary); font-weight: var(--weight-semibold); padding: 2px 4px; }

/* ============================================================
   Empty state
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-9) var(--space-5);
}
.empty-state__icon {
  display: grid;
  place-items: center;
  width: 72px; height: 72px;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--gradient-brand-soft);
  color: var(--text-brand);
}
.empty-state__icon svg { width: 32px; height: 32px; }
.empty-state__title { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.empty-state__text { max-width: 420px; color: var(--text-secondary); margin-bottom: var(--space-5); }

/* ============================================================
   Theme toggle (animated sun / moon)
   ============================================================ */
.theme-toggle .theme-toggle__icon { transition: transform var(--dur-base) var(--ease-spring); }
.theme-toggle:hover .theme-toggle__icon { transform: rotate(24deg) scale(1.08); }

/* ============================================================
   Tooltip (CSS-only, for icon buttons)
   ============================================================ */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  translate: -50% 0;
  padding: 4px 10px;
  background: var(--bg-surface-solid);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease-out) 300ms;
  z-index: var(--z-dropdown);
}
[data-tooltip]:hover::after, [data-tooltip]:focus-visible::after { opacity: 1; }