/* Shared component layer: buttons, inputs, chips, cards, menus, page header,
   empty states and motion. Every colour comes from the tokens in
   base_dashboard.css, so these render in both light and dark themes.
   Page stylesheets build on these classes rather than restyling controls. */

/* Links: one colour, visible on hover. Pages that style their own links
   (nav, row titles) override this. */
a {
  color: var(--accent);
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 2px;
}
a:hover {
  text-decoration-color: currentColor;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.tnum {
  font-variant-numeric: tabular-nums;
}

/* Buttons: one filled primary per view; everything else secondary or ghost.
   Destructive styling appears only in the confirmation step (.btn--danger). */
.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  box-sizing: border-box;
  height: var(--h-md);
  margin: 0;
  padding: 0 0.9rem;
  border-radius: var(--r-2);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.btn svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}
.btn:hover {
  text-decoration: none;
}
.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn--primary {
  background: var(--accent);
  color: var(--text-inverse);
}
.btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
  color: var(--text-inverse);
}
.btn--secondary {
  background: var(--surface-card);
  color: var(--text);
  border-color: var(--border-strong);
}
.btn--secondary:hover:not(:disabled) {
  background: var(--surface);
  color: var(--text);
}
.btn--ghost {
  background: transparent;
  color: var(--text-soft);
}
.btn--ghost:hover:not(:disabled) {
  background: var(--surface-tint);
  color: var(--text);
}
.btn--danger {
  background: var(--danger);
  color: var(--text-inverse);
}
.btn--danger:hover:not(:disabled) {
  background: var(--danger-hover);
  color: var(--text-inverse);
}
/* A secondary or ghost button that leads to a destructive confirm step:
   neutral at rest, red only when the pointer is on it. */
.btn--destructive:hover:not(:disabled) {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 40%, var(--border-strong));
  background: var(--danger-soft);
}
.btn--sm {
  height: var(--h-sm);
  padding: 0 0.7rem;
  font-size: var(--fs-xs);
}
.btn--sm svg {
  width: 0.9rem;
  height: 0.9rem;
}
.btn--lg {
  height: var(--h-lg);
  padding: 0 1.2rem;
  font-size: var(--fs-body);
}
.btn--icon {
  width: var(--h-md);
  padding: 0;
}
.btn--icon.btn--sm {
  width: var(--h-sm);
}
.btn--icon.btn--xs {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--r-1);
}
.btn--block {
  width: 100%;
}
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

/* Inputs */
.input,
.select,
.textarea {
  box-sizing: border-box;
  width: 100%;
  min-height: var(--h-md);
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-2);
  background: var(--surface-card);
  color: var(--text);
  font: inherit;
  font-size: var(--fs-body);
  line-height: 1.4;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.textarea {
  resize: vertical;
}
.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}
.input::placeholder,
.textarea::placeholder {
  color: var(--text-faint);
}
.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.field-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.field-hint {
  font-size: var(--fs-sm);
  color: var(--text-soft);
  line-height: 1.45;
}

/* Chips: neutral fill with a coloured dot carrying the state. */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 1.5rem;
  padding: 0 0.6rem;
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: var(--fs-xs);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
}
.chip__dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}
.chip--success .chip__dot { background: var(--success); }
.chip--danger .chip__dot { background: var(--danger); }
.chip--warning .chip__dot { background: var(--warning); }
.chip--info .chip__dot { background: var(--info); }
.chip--accent {
  background: var(--accent-soft);
  color: var(--accent);
}
.chip--outline {
  background: transparent;
  border: 1px solid var(--border);
}
a.chip:hover,
button.chip:hover {
  color: var(--text);
  background: var(--surface-tint);
}

/* Avatars: a round initial on a tint chosen from the sender's address. */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--avatar-1-bg);
  color: var(--avatar-1-fg);
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1;
  user-select: none;
}
.avatar--sm {
  width: 1.75rem;
  height: 1.75rem;
  font-size: var(--fs-sm);
}
.avatar--tone-1 { background: var(--avatar-1-bg); color: var(--avatar-1-fg); }
.avatar--tone-2 { background: var(--avatar-2-bg); color: var(--avatar-2-fg); }
.avatar--tone-3 { background: var(--avatar-3-bg); color: var(--avatar-3-fg); }
.avatar--tone-4 { background: var(--avatar-4-bg); color: var(--avatar-4-fg); }
.avatar--tone-5 { background: var(--avatar-5-bg); color: var(--avatar-5-fg); }
.avatar--tone-6 { background: var(--avatar-6-bg); color: var(--avatar-6-fg); }
.avatar--tone-7 { background: var(--avatar-7-bg); color: var(--avatar-7-fg); }
.avatar--tone-8 { background: var(--avatar-8-bg); color: var(--avatar-8-fg); }

/* Cards: one delineator (a faint border). Shadows are for floating layers. */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  box-shadow: var(--shadow);
}
.card--pad {
  padding: 1.1rem 1.25rem;
}
.card-title {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.3;
}
.section-label {
  margin: 0 0 0.5rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* Floating menus */
.menu {
  min-width: 12rem;
  margin: 0;
  padding: 0.3rem;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  box-shadow: var(--shadow-float);
}
.menu__item {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  margin: 0;
  padding: 0.5rem 0.65rem;
  border: 0;
  border-radius: var(--r-2);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: var(--fs-sm);
  font-weight: 500;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
.menu__item:hover,
.menu__item:focus-visible {
  background: var(--surface-tint);
  outline: none;
}
.menu__item svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  color: var(--text-soft);
}

/* Page header: title on the left, actions on the right, banners below. */
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin: 0 0 1.25rem;
}
.page-head__title {
  flex: 1 1 auto;
  min-width: 0;
}
.page-title:empty,
.page-head__title:has(> .page-title:empty) {
  display: none;
}
.page-head__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}
.page-head:has(> .page-head__title > .page-title:empty) {
  margin-bottom: 0.75rem;
}
.page-title {
  margin: 0;
  font-size: var(--fs-title);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
  text-wrap: balance;
}
.page-subtitle {
  margin: 0.25rem 0 0;
  font-size: var(--fs-body);
  color: var(--text-soft);
}

/* Empty states */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
  padding: 2.5rem 1rem;
}
.empty-state__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.empty-state__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}
.empty-state__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}
.empty-state__text {
  margin: 0;
  max-width: 34ch;
  font-size: var(--fs-body);
  color: var(--text-soft);
  line-height: 1.5;
}
.empty-state__actions {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Skeleton placeholders while a panel loads */
.skeleton {
  display: block;
  border-radius: var(--r-1);
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-tint) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: mm-shimmer 1.4s linear infinite;
}

/* Motion */
@keyframes mm-shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}
@keyframes mm-fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
@keyframes mm-pop-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
@keyframes mm-complete {
  0% { opacity: 1; transform: none; }
  40% { opacity: 0.4; transform: translateX(6px); }
  100% { opacity: 0; transform: translateX(6px); max-height: 0; margin: 0; padding-top: 0; padding-bottom: 0; }
}
@keyframes mm-check {
  0% { transform: scale(0.6); }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); }
}
.anim-fade-up {
  animation: mm-fade-up 0.22s ease both;
}
.is-completing {
  overflow: hidden;
  max-height: 6rem;
  animation: mm-complete 0.26s ease forwards;
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .anim-fade-up,
  .is-completing {
    animation: none;
  }
  .is-completing {
    opacity: 0;
  }
}

/* Hover / focus explainer under a button: wrap both in .hint-popover-anchor
   and point the button's aria-describedby at the .hint-popover. */
.hint-popover-anchor {
  position: relative;
  display: inline-flex;
}
.hint-popover {
  position: absolute;
  z-index: 80;
  left: 50%;
  top: calc(100% + 0.35rem);
  width: min(16rem, calc(100vw - 2rem));
  padding: 0.55rem 0.7rem;
  border-radius: var(--r-3);
  border: 1px solid var(--border);
  background: var(--surface-card);
  box-shadow: var(--shadow-float);
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 400;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, -0.1rem);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
}
.hint-popover-anchor:hover .hint-popover,
.hint-popover-anchor:focus-within .hint-popover {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
@media (hover: none) {
  .hint-popover-anchor:hover .hint-popover {
    opacity: 0;
    visibility: hidden;
  }
}