/* Thread panel (layout shell: #thread-panel in layout.css) */

.thread-panel__header {
  align-items: center;
  border-block-end: 1px solid var(--color-border-darker);
  display: flex;
  flex-shrink: 0;
  gap: var(--inline-space-half);
  min-block-size: var(--navbar-height);
  padding-inline: calc(var(--inline-space) + 1vw);
}

.thread-panel__title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.thread-panel__room {
  color: var(--color-text);
  opacity: 0.5;
}

.thread-panel__close-btn {
  --btn-padding: 0.35em;

  flex-shrink: 0;
  margin-inline-start: auto;
}

.thread-panel__close-icon {
  display: block;
  inline-size: 1em;
  opacity: 0.75;
}

.thread-panel__close-btn:hover .thread-panel__close-icon {
  opacity: 1;
}

.thread-panel__messages {
  flex: 1;
  min-block-size: 0;
  overflow-y: auto;
  overscroll-behavior: contain;

  .message__body {
    max-inline-size: 100%;
  }

  .message:first-child .message__day-separator {
    display: grid;
    visibility: visible;
  }
}

.thread-panel__parent {
  border-block-end: 1px solid var(--color-border);
  padding: var(--block-space) calc(var(--inline-space) + 1vw);
}

/* Thread parent message: flat layout, no bubble */
.thread-parent {
  display: flex;
  flex-direction: column;
  gap: var(--block-space-half);
}

.thread-parent__header {
  align-items: center;
  display: flex;
  gap: 0.5ch;
}

.thread-parent__avatar {
  --avatar-size: 2.5ch;
  --avatar-border-size: 1px;

  flex-shrink: 0;
  margin-inline-end: 0.2ch;
}

.thread-parent__author {
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.thread-parent__time {
  color: var(--color-text);
  font-size: 0.8rem;
  margin-inline-start: auto;
  opacity: 0.5;
  text-decoration: none;
  white-space: nowrap;
}

.thread-parent__body {
  font-weight: 400;
  word-break: break-word;

  .trix-content {
    font-size: 0.95rem;
  }
}

.thread-parent__actions {
  padding-block-start: 0.2em;
}

.thread-panel__separator {
  align-items: center;
  display: flex;
  gap: var(--inline-space);
  padding: var(--block-space-half) calc(var(--inline-space) + 0.5vw);

  &::before,
  &::after {
    border-top: 1px solid var(--color-border);
    content: "";
    flex: 1;
  }
}

.thread-panel__separator-text {
  color: var(--color-text);
  font-weight: 600;
  opacity: 0.6;
  white-space: nowrap;
}

.thread-panel__composer {
  flex-shrink: 0;
  padding: var(--block-space-half) calc(var(--inline-space) + 1vw);
  padding-block-end: max(var(--block-space-half), env(safe-area-inset-bottom, 0px));
}

.thread-panel__composer > .composer {
  inline-size: 100%;
  margin: 0;
  min-inline-size: 0;
}

/* Thread badge on messages (inside .message__body-content) */
.thread-badge {
  align-items: center;
  background: none;
  border: none;
  border-block-start: 1px solid var(--color-border);
  border-radius: 0;
  color: var(--color-link);
  cursor: pointer;
  display: flex;
  font-size: 0.8rem;
  font-weight: 500;
  gap: 0.5ch;
  margin-block-start: 0.2em;
  margin-inline: calc(var(--content-padding-inline) * -1);
  padding: 0.4em var(--content-padding-inline) 0.2em;

  &:hover {
    background-color: oklch(var(--lch-white) / 0.06);
  }
}

.thread-badge__avatars {
  display: inline-flex;

  .avatar {
    --avatar-size: 1.8ch;
    --avatar-border-size: 1px;

    &:not(:first-child) {
      margin-inline-start: -0.4ch;
    }
  }
}

.thread-badge__text {
  white-space: nowrap;
}