.ts-back {
  display: inline-block;
  margin-bottom: 1.25rem;
  font-family: var(--ts-font-mono);
  font-size: 0.8125rem;
  color: var(--ts-muted);
  text-decoration: none;

  &:hover {
    color: var(--ts-ink);
  }
}

.ts-issue {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20rem;
  gap: 2.5rem;
  align-items: start;

  @media (max-width: 960px) {
    grid-template-columns: minmax(0, 1fr);
  }
}

.ts-issue__main {
  display: grid;
  // Without it the column takes the width of its widest field: on a phone,
  // wider than the screen.
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  min-width: 0;
}

// Header: key · type · status, then the title.
.ts-issue__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ts-type {
  display: inline-flex;
  align-items: center;
  gap: 0.3125rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--tone);
}

.ts-issue__title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.75rem 1rem;
  margin-top: 0.75rem;

  h1 {
    flex: 1 1 20rem;
    min-width: 0;
    margin: 0;
    font-size: clamp(1.625rem, 1.2rem + 1.4vw, 2.375rem);
    font-weight: 700;
    line-height: 1.1;
    text-wrap: balance;
  }
}

// Follow and edit, together, level with the title's first line.
.ts-issue__actions {
  display: flex;
  flex-shrink: 0;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.25rem;
}

// Workflow: one button per allowed destination, in that status' colour.
.ts-transitions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 0.875rem;
  border: 1px dashed var(--ts-line-strong);
  border-radius: 0.75rem;

  .ts-eyebrow {
    margin-right: 0.25rem;
  }
}

.ts-move {
  --tone: var(--ts-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.75rem 0.4375rem 0.625rem;
  border: 1px solid color-mix(in srgb, var(--tone) 35%, var(--ts-line));
  border-radius: 999px;
  background: var(--ts-surface);
  color: var(--ts-ink);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background-color 0.15s ease,
    border-color 0.15s ease;

  &::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--tone);
  }

  span {
    color: var(--tone);
    transition: transform 0.15s ease;
  }

  &:hover {
    background: color-mix(in srgb, var(--tone) 10%, var(--ts-surface));
    border-color: var(--tone);

    span {
      transform: translateX(2px);
    }
  }

  &:focus-visible {
    outline: 2px solid var(--tone);
    outline-offset: 2px;
  }
}

// Sections: small uppercase label over a rule (pireon.dev's eyebrow, in grey).
.ts-section {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ts-line);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ts-muted);

  .ts-mono {
    color: var(--ts-ink-soft);
  }
}

.ts-block > p {
  margin: 0;
  line-height: 1.6;
}

.ts-figma {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: 0.75rem;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ts-t-ui) 10%, var(--ts-surface));
  color: color-mix(in srgb, var(--ts-t-ui) 80%, var(--ts-ink));
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
}

.ts-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.375rem 0;
}

.ts-link__kind {
  min-width: 9rem;
  font-size: 0.875rem;
  color: var(--ts-muted);
}

a.ts-key {
  text-decoration: none;

  &:hover {
    border-color: var(--ts-brand);
    color: var(--ts-brand);
  }
}

.ts-inline-form {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.875rem;

  @media (max-width: 640px) {
    grid-template-columns: minmax(0, 1fr);
  }
}

.ts-inline-form--two {
  grid-template-columns: minmax(0, 1fr) auto;
}

// Breakdown: the ticket it hangs from, its checklist and its subtasks.
.ts-parent {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-width: 0;
  color: var(--ts-muted);
  font-size: 0.8125rem;
  text-decoration: none;

  &:hover {
    color: var(--ts-brand);
  }
}

.ts-parent__title {
  overflow: hidden;
  max-width: 18rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ts-checklist__rule {
  margin: 0 0 0.5rem;
  color: var(--ts-muted);
  font-size: 0.8125rem;
}

.ts-checklist,
.ts-children {
  display: grid;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ts-checklist__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;

  &.is-done {
    color: var(--ts-muted);
    text-decoration: line-through;
  }
}

.ts-children {
  margin-top: 0.75rem;
}

.ts-child {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  gap: 0.625rem;
  align-items: center;
  padding: 0.375rem 0;
  border-top: 1px solid var(--ts-line);

  .ts-comment__avatar {
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.625rem;
  }
}

.ts-child__title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ts-parent-form {
  display: flex;
  align-items: center;
  gap: 0.75rem;

  .ts-inline-form {
    flex: 1;
  }

  > .ts-muted {
    margin-top: 0.875rem;
  }
}

// Comments: a thread with initials on a rail.
.ts-comment {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--ts-line);
}

.ts-comment__avatar {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ts-brand) 16%, var(--ts-surface));
  color: color-mix(in srgb, var(--ts-brand) 70%, var(--ts-ink));
  font-family: var(--ts-font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
}

.ts-comment__body {
  min-width: 0;

  p {
    margin: 0.25rem 0 0;
    line-height: 1.55;
  }
}

/* A decision: marked on its comment, and listed above the ticket. */
.ts-comment.is-decision {
  margin-inline: -0.75rem;
  padding-inline: 0.75rem;
  border-left: 3px solid var(--ts-c-green);
  background: color-mix(in srgb, var(--ts-c-green) 6%, transparent);
}

.ts-comment.is-pointed {
  animation: ts-pointed 2.4s ease-out;
}

@keyframes ts-pointed {
  0%,
  40% {
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--ts-brand) 45%, transparent);
  }
  100% {
    box-shadow: 0 0 0 3px transparent;
  }
}

.ts-comment__decision {
  padding: 0.0625rem 0.5rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ts-c-green) 16%, transparent);
  color: var(--ts-c-green);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* A plain icon button, not @pi/ui's sized one. */
.ts-comment__flag {
  display: inline-grid;
  place-items: center;
  width: 2rem !important;
  min-width: 0 !important;
  height: 2rem !important;
  padding: 0 !important;
  border: 0;
  border-radius: 0.5rem;
  background: transparent;
  color: var(--ts-muted);
  cursor: pointer;

  &:hover,
  &:focus-visible {
    background: var(--ts-sunken);
    color: var(--ts-ink);
  }

  &.is-on {
    color: var(--ts-c-green);
  }
}

.ts-decisions {
  ol {
    display: grid;
    gap: 0.875rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  li {
    padding: 0.75rem 1rem;
    border-left: 3px solid var(--ts-c-green);
    border-radius: 0 0.5rem 0.5rem 0;
    background: color-mix(in srgb, var(--ts-c-green) 7%, var(--ts-surface));
  }

  .ts-section pi-icon {
    color: var(--ts-c-green);
  }
}

.ts-decisions__meta {
  margin: 0.375rem 0 0;
  color: var(--ts-muted);
  font-size: 0.8125rem;
}

/* Looks like a link: not @pi/ui's sized button. */
.ts-decisions__go {
  display: inline !important;
  min-width: 0 !important;
  height: auto !important;
  padding: 0 !important;
  border: 0;
  background: none !important;
  color: var(--ts-brand);
  font: inherit;
  cursor: pointer;

  &:hover,
  &:focus-visible {
    text-decoration: underline;
  }
}

.ts-comment__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2rem;
}

.ts-comment__when {
  font-family: var(--ts-font-mono);
  font-size: 0.75rem;
  color: var(--ts-muted);
}

.ts-spacer {
  flex: 1;
}

// History as a log: time · what · how long ago.
.ts-log {
  margin: 0;
  padding: 0;
  list-style: none;

  li {
    display: grid;
    grid-template-columns: 3.75rem minmax(0, 1fr) auto;
    gap: 0.875rem;
    align-items: baseline;
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--ts-line);
    font-size: 0.875rem;

    &:last-child {
      border-bottom: 0;
    }
  }
}

.ts-log__when,
.ts-log__ago {
  font-family: var(--ts-font-mono);
  font-size: 0.75rem;
  color: var(--ts-muted);
}

.ts-log__what {
  color: var(--ts-ink-soft);
}

@media (max-width: 640px) {
  .ts-log li {
    grid-template-columns: 3.25rem minmax(0, 1fr);
  }

  .ts-log__ago {
    display: none;
  }
}

// Side: the ticket's sheet.
.ts-issue__side {
  display: grid;
  gap: 1.375rem;

  > .ts-eyebrow {
    margin-bottom: 0.125rem;
  }

  position: sticky;
  top: 5.5rem;
  padding: 1.5rem;

  @media (max-width: 960px) {
    position: static;
  }
}

.ts-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.625rem 1rem;
  margin: 0.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--ts-line);
  font-size: 0.875rem;

  dt {
    font-family: var(--ts-font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ts-muted);
    align-self: center;
  }

  dd {
    margin: 0;
  }

  .ts-mono {
    font-size: 0.8125rem;
  }
}

.ts-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.ts-label {
  font-family: var(--ts-font-mono);
  font-size: 0.8125rem;
  color: var(--ts-brand);
}

.ts-attachments {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 0.5rem;
  margin: 0.5rem 0;
}

// Code that mentions the ticket (from the Git integration).
.ts-dev {
  display: grid;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ts-dev__item {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) auto auto auto;
  gap: 0.625rem;
  align-items: center;
  padding: 0.375rem 0;
  border-top: 1px solid var(--ts-line);

  @media (max-width: 640px) {
    grid-template-columns: 4rem minmax(0, 1fr);

    .ts-dev__ref,
    .ts-dev__when {
      display: none;
    }
  }

  .ts-pill[data-state='MERGED'] {
    --tone: var(--ts-c-violet, var(--ts-brand));
  }

  .ts-pill[data-state='OPEN'] {
    --tone: var(--ts-c-green, var(--ts-brand));
  }
}

.ts-dev__kind {
  color: var(--ts-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ts-dev__title {
  overflow: hidden;
  color: inherit;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ts-dev__when {
  font-size: 0.8125rem;
}

.ts-trashed {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--ts-c-red, #dc2626) 12%, transparent);
}

// One level of replies under each comment.
.ts-replies {
  display: grid;
  gap: 0.75rem;
  margin: -0.25rem 0 0.5rem 2.75rem;
  padding-left: 0.875rem;
  border-left: 2px solid var(--ts-line);

  &:empty {
    display: none;
  }
}

.ts-comment__gone {
  margin: 0;
  font-style: italic;
}

// A text link, past @pi/ui's global button look: as a 40 px pill it sat on
// the line under the comment.
.ts-thread__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  margin-top: 0.375rem;
}

/* Small text buttons, not @pi/ui's sized ones. */
.ts-thread__action {
  flex: none;
  height: auto !important;
  min-width: 0 !important;
  padding: 0.125rem 0 !important;
  border: 0;
  background: none !important;
  color: var(--ts-brand);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;

  &:hover,
  &:focus-visible {
    text-decoration: underline;
  }
}

/* A settled conversation, folded to one line. */
.ts-thread-done {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.5rem 0;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--ts-line);
  border-radius: 0.625rem;
  background: var(--ts-sunken);
}

.ts-thread-done__check {
  flex: none;
  display: inline-grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ts-c-green) 18%, transparent);
  color: var(--ts-c-green);
  font-weight: 700;
}

.ts-thread-done__text {
  display: grid;
  flex: 1;
  min-width: 0;
  font-size: 0.875rem;

  > span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

.ts-thread-done__topic {
  font-weight: 600;
}

.ts-open-threads {
  margin-left: auto;
  padding: 0.0625rem 0.5rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ts-c-amber) 18%, transparent);
  color: var(--ts-ink);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
}

.ts-typing {
  margin: 0;
  color: var(--ts-muted);
  font-size: 0.8125rem;
  font-style: italic;
}

.ts-resolve__label {
  display: grid;
  gap: 0.375rem;
  color: var(--ts-muted);
  font-size: 0.8125rem;
}

.ts-resolve__text {
  font: inherit;
  color: var(--ts-ink);
  resize: vertical;
}

.ts-reply__actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.ts-votes {
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--ts-line);
  border-radius: 999px;
  color: var(--ts-muted);
  font-size: 0.8125rem;
}

.ts-presence {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.375rem 0 0.25rem;
  color: var(--ts-ink-soft);
  font-size: 0.8125rem;
}

.ts-presence__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--ts-c-green, #2e9e6a);
}

/* My own reminder on the ticket. */
.ts-reminder {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.625rem;
  margin: 0;
  padding: 0.5rem 0.875rem;
  border-radius: 0.625rem;
  background: color-mix(in srgb, var(--ts-c-amber) 14%, transparent);
  font-size: 0.875rem;
}

/* Small text buttons, not @pi/ui's sized ones. */
.ts-reminder__action {
  height: auto !important;
  min-width: 0 !important;
  padding: 0 !important;
  border: 0;
  background: none !important;
  color: var(--ts-brand);
  font: inherit;
  font-weight: 600;
  cursor: pointer;

  &:hover,
  &:focus-visible {
    text-decoration: underline;
  }
}

.ts-reminder__choices {
  display: grid;
  gap: 0.375rem;
}

.ts-reminder__choice {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  height: auto !important;
  min-width: 0 !important;
  padding: 0.625rem 0.875rem !important;
  border: 1px solid var(--ts-line);
  border-radius: 0.5rem;
  background: var(--ts-surface);
  color: var(--ts-ink);
  font: inherit;
  text-align: left;
  cursor: pointer;

  &:hover,
  &:focus-visible {
    border-color: var(--ts-brand);
  }
}

.ts-reminder__field {
  display: grid;
  gap: 0.375rem;
  color: var(--ts-muted);
  font-size: 0.8125rem;

  .ts-input {
    font: inherit;
    color: var(--ts-ink);
  }
}

/* Reviews asked on the ticket. */
.ts-reviews {
  ul {
    display: grid;
    gap: 0.625rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  li {
    padding: 0.625rem 0.875rem;
    border-left: 3px solid var(--ts-c-amber);
    border-radius: 0 0.5rem 0.5rem 0;
    background: color-mix(in srgb, var(--ts-c-amber) 8%, var(--ts-surface));

    &.is-approved {
      border-left-color: var(--ts-c-green);
      background: color-mix(in srgb, var(--ts-c-green) 7%, var(--ts-surface));
    }

    &.is-changes {
      border-left-color: var(--ts-c-red);
      background: color-mix(in srgb, var(--ts-c-red) 6%, var(--ts-surface));
    }
  }

  p {
    margin: 0;
    font-size: 0.875rem;
  }
}

.ts-reviews__note {
  margin-top: 0.25rem !important;
  color: var(--ts-ink-soft);
}

.ts-reviews__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 0.5rem;

  &:empty {
    display: none;
  }
}

/* Small buttons, not @pi/ui's sized ones. */
.ts-reviews__button {
  height: auto !important;
  min-width: 0 !important;
  padding: 0.25rem 0.75rem !important;
  border: 1px solid var(--ts-line-strong) !important;
  border-radius: 999px !important;
  background: var(--ts-surface) !important;
  color: var(--ts-ink);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;

  &.is-ok {
    border-color: transparent !important;
    background: var(--ts-c-green) !important;
    color: #fff;
  }

  &:hover,
  &:focus-visible {
    filter: brightness(1.05);
  }
}

.ts-reviews__link {
  height: auto !important;
  min-width: 0 !important;
  padding: 0 !important;
  border: 0;
  background: none !important;
  color: var(--ts-brand);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
}