/* Shared interactive controls. Variants: filled, outline, ghost; sizes: small, medium, large. */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  --btn-border: transparent;
  --btn-pressed-bg: transparent;
  --btn-pressed-fg: var(--button-neutral-pressed-text);
  --btn-pressed-border: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--size-90-10px);
  border: 1.5px solid var(--btn-border);
  border-radius: var(--size-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  box-shadow: none;
  text-decoration: none;
  font-family: inherit;
  font-weight: var(--type-body-weight);
  line-height: var(--lh-control);
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
  transform: none;
}

.btn--filled {
  --btn-bg: var(--accent);
  --btn-fg: var(--on-accent);
  --btn-pressed-bg: var(--button-filled-pressed-surface);
  --btn-pressed-fg: var(--button-filled-pressed-text);
}

.btn--outline {
  --btn-border: var(--text);
  --btn-pressed-border: var(--button-neutral-pressed-text);
}

.btn--ghost {
  --btn-bg: transparent;
}

/* Shared button sizes */
.btn--small {
  min-height: 2.5rem;
  padding: var(--size-90-10px) var(--size-225-18px);
  font-size: var(--fs-body-small);
}

.btn--medium {
  min-height: 3rem;
  padding: var(--size-100-12px) var(--size-300-24px);
  font-size: var(--fs-body-medium);
}

.btn--large {
  min-height: 3.5rem;
  padding: var(--size-200-16px) var(--size-350-32px);
  font-size: var(--fs-body-large);
}

.btn--icon {
  padding: var(--size-0-0px);
  aspect-ratio: 1;
}

.btn--icon.btn--small {
  width: 2.5rem;
}

.btn--icon.btn--medium {
  width: 3rem;
}

.btn--icon.btn--large {
  width: 3.5rem;
}

.btn__icon {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.btn--filled:hover {
  background: var(--button-filled-hover-surface);
  color: var(--button-filled-hover-text);
  box-shadow: none;
  transform: none;
}

.btn--outline:hover,
.btn--ghost:hover {
  --btn-pressed-bg: var(--button-neutral-hover-pressed-surface);
  background: var(--surface-soft);
  color: var(--text);
  transform: none;
}

.btn:active,
.btn[aria-pressed='true'] {
  background: var(--btn-pressed-bg);
  color: var(--btn-pressed-fg);
  border-color: var(--btn-pressed-border);
}

/* Neutral disabled colours stay readable without fading the whole control. */
.btn:disabled,
.btn[aria-disabled='true'] {
  background: transparent;
  border-color: transparent;
  color: var(--disabled-text);
  opacity: 1;
  cursor: not-allowed;
  pointer-events: none;
  filter: none;
}

.btn--filled:disabled,
.btn--filled[aria-disabled='true'] {
  background: var(--disabled-surface);
}

.btn--outline:disabled,
.btn--outline[aria-disabled='true'] {
  border-color: var(--disabled-border);
}

.btn:focus-visible,
.segmented-control button:focus-visible {
  outline: 3px solid var(--accent-deep);
  outline-offset: 3px;
}

/* Focus rings followed the old whole-button filter, so retain those colours. */
.btn--filled:hover:focus-visible {
  outline-color: var(--button-filled-hover-focus);
}

.btn:active:focus-visible,
.btn[aria-pressed='true']:focus-visible {
  outline-color: var(--button-pressed-focus);
}

.segmented-control .btn:focus-visible {
  outline-color: var(--accent-deep);
}

/* Reusable tooltip for controls with a data-tooltip label. */
.tooltip {
  position: fixed;
  z-index: 200;
  width: max-content;
  max-width: min(20rem, calc(100vw - 1rem));
  padding: var(--size-75-8px) var(--size-100-12px);
  border: 1px solid var(--line);
  border-radius: var(--size-90-10px);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font-family: var(--ff-primary);
  font-size: var(--fs-body-small);
  line-height: var(--lh-control);
  overflow-wrap: anywhere;
}

.tooltip[hidden] {
  display: none;
}

/* Temporary season switcher for reviewing the themes. */
.season-preview {
  position: fixed;
  z-index: 120;
  bottom: var(--size-240-20px);
  left: 50%;
  display: flex;
  align-items: center;
  gap: var(--size-200-16px);
  max-width: calc(100vw - 2rem);
  padding: var(--size-90-10px) var(--size-100-12px);
  border: 1px solid var(--line);
  border-radius: var(--size-200-16px);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: var(--fs-body-small);
  transform: translateX(-50%);
}

.season-preview[hidden] {
  display: none;
}

.season-preview label {
  white-space: nowrap;
}

.season-preview__select {
  position: relative;
  min-width: 0;
}

.season-preview select {
  min-width: 0;
  max-width: 100%;
  padding: var(--size-75-8px) var(--size-370-40px) var(--size-75-8px) var(--size-100-12px);
  border: 1px solid var(--line);
  border-radius: var(--size-90-10px);
  appearance: none;
  background: var(--surface-soft);
  color: var(--text);
  font: inherit;
}

.season-preview__select svg {
  position: absolute;
  top: 50%;
  right: 0.75rem;
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
  transform: translateY(-50%);
}

.season-preview select:focus-visible {
  outline: 3px solid var(--accent-deep);
  outline-offset: 2px;
}

/* Non-interactive labels for categories and other short metadata. */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--size-65-6px);
  padding: var(--size-75-8px) var(--size-100-12px);
  border: 1px solid var(--line);
  border-radius: var(--size-pill);
  background: var(--surface-soft);
  color: var(--accent-deep);
  font-family: inherit;
  font-size: var(--fs-body-small);
  font-weight: var(--type-body-weight);
  line-height: var(--lh-control);
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--size-100-12px);
}

/* Theme selector and its sliding active indicator */
.segmented-control {
  display: inline-flex;
  align-items: center;
  gap: var(--size-25-2px);
  padding: var(--size-50-4px);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--size-pill);
}

.segmented-control button {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 0;
  border-radius: var(--size-pill);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

.segmented-control button:hover {
  background: var(--glass);
  color: var(--text);
}

.segmented-control button[aria-pressed='true'] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-segment);
}

.segmented-control .btn--icon {
  width: 2.1rem;
  height: 2.1rem;
  min-height: 0;
  padding: var(--size-0-0px);
}

/* Preserve the translucent segment's existing pressed compositing. */
.segmented-control .btn:active:not([aria-pressed='true']):not(:disabled):not([aria-disabled='true']) {
  filter: brightness(0.87);
}

.segmented-control {
  position: relative;
  isolation: isolate;
}

.segmented-control button {
  position: relative;
  z-index: 1;
}

.segmented-control .segment-indicator {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
  border-radius: var(--size-pill);
  background: var(--surface);
  box-shadow: var(--shadow-segment);
  opacity: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .segmented-control .segment-indicator.is-sliding {
    transition:
      transform 0.35s ease,
      width 0.35s ease,
      height 0.35s ease;
  }
}

.segmented-control.has-segment-indicator .segment-indicator {
  opacity: 1;
}

.segmented-control.has-segment-indicator button[aria-pressed='true'],
.theme-switcher.segmented-control.has-segment-indicator button[aria-pressed='true'] {
  background: transparent;
  box-shadow: none;
}

.mobile-nav-toggle.btn {
  display: none;
}

@media (max-width: 900px) {
  .mobile-nav-toggle.btn {
    display: flex;
  }
}

/* Navigation links share the same pill treatment wherever they are used. */
.nav-link,
.primary-navigation .nav-list a {
  display: block;
  padding: var(--size-100-12px) var(--size-225-18px);
  border-radius: var(--size-pill);
  color: var(--text);
  font-size: var(--fs-body-small);
  font-weight: var(--type-body-weight);
  line-height: var(--lh-navigation);
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color 0.35s ease-in-out,
    color 0.35s ease-in-out;
}

.nav-link:hover,
.primary-navigation .nav-list a:hover {
  background: var(--surface-soft);
}

.nav-link[aria-current='page'],
.primary-navigation .nav-list a[aria-current='page'] {
  background: var(--surface-soft);
  background: color-mix(in srgb, var(--text) 16%, var(--surface));
}

.nav-link[aria-current='page']:hover,
.primary-navigation .nav-list a[aria-current='page']:hover {
  background: var(--surface-soft);
}

.nav-link:active,
.primary-navigation .nav-list a:active {
  filter: brightness(0.93);
}

.nav-link:focus-visible,
.primary-navigation .nav-list a:focus-visible {
  outline: 3px solid var(--accent-deep);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .nav-link,
  .primary-navigation .nav-list a {
    padding: var(--size-100-12px) var(--size-225-18px);
    font-size: var(--fs-body-large);
  }
}

@media (max-width: 480px) {
  .segmented-control .btn--icon {
    width: 1.85rem;
    height: 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .segmented-control button,
  .segmented-control .segment-indicator,
  .nav-link,
  .primary-navigation .nav-list a {
    transition: none;
  }
}