.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;
  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;
  align-items: flex-start;
  gap: 0.5rem;

  h1 {
    margin: 0.75rem 0 0;
    font-size: clamp(1.625rem, 1.2rem + 1.4vw, 2.375rem);
    font-weight: 700;
    line-height: 1.1;
    text-wrap: balance;
  }
}

// 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,
.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;
  }
}

.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;
}

.ts-mention {
  padding: 0 0.2em;
  border-radius: 0.25em;
  background: color-mix(in oklab, var(--ts-brand) 14%, transparent);
  color: inherit;
  font-weight: 600;
}

.ts-mention.is-me {
  background: color-mix(in oklab, var(--ts-brand) 30%, transparent);
}

.ts-mentions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.ts-mentions__option {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.625rem 0.25rem 0.25rem;
  border: 1px solid rgba(127, 127, 127, 0.3);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.ts-mentions__option:hover,
.ts-mentions__option:focus-visible {
  border-color: currentColor;
}

// 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;
}