/* Architecture – JIRA-style board + Topic / Answer detail panel */

.main.main--arch {
  max-width: none;
  padding: 0.75rem 24px 1.5rem;
  width: 100%;
  box-sizing: border-box;
}

.arch-wrap {
  display: flex;
  gap: 1rem;
  align-items: stretch;
  min-height: 0;
  height: calc(100vh - 180px);
  min-height: 420px;
}

.arch-board-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.arch-board-wrap .kanban-board {
  flex: 1;
  min-height: 0;
}

.arch-detail-panel {
  width: 400px;
  flex-shrink: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.arch-detail-panel[aria-hidden="true"] {
  display: none;
}

.arch-detail-panel__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.arch-detail-panel__empty {
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.arch-detail-panel__content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.arch-detail-panel__header {
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.arch-detail-panel__header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.arch-detail-breadcrumb {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.arch-detail-breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.arch-detail-breadcrumb a:hover {
  text-decoration: underline;
}

.arch-detail-subtopics {
  margin-bottom: 0.75rem;
}

.arch-detail-subtopics .arch-answer__list {
  margin-bottom: 0.35rem;
}

.arch-detail-subtopics .arch-answer__list a {
  cursor: pointer;
}

.arch-detail-panel__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  flex: 1;
  min-width: 0;
}

.arch-detail-panel__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.arch-detail-panel__delete {
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  color: var(--color-error, #c00);
  background: transparent;
  border: 1px solid var(--color-error, #c00);
  border-radius: var(--radius);
  cursor: pointer;
}

.arch-detail-panel__delete:hover {
  background: rgba(204, 0, 0, 0.08);
}

.arch-detail-panel__close {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.arch-detail-panel__close:hover {
  background: var(--color-hero-tint);
  color: var(--color-text);
}

.arch-detail-panel__close:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-accent);
}

/* Topic section – read-only context */
.arch-topic {
  padding: 1rem 1rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.arch-section-heading {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.arch-topic__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.arch-topic__meta .arch-meta-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  background: var(--color-hero-tint);
  color: var(--color-text);
}

.arch-topic__description {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-text-muted);
}

.arch-topic__description:empty {
  display: none;
}

.arch-topic__source {
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
}

.arch-topic__source:hover {
  text-decoration: underline;
}

/* Answer section – editable */
.arch-answer {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 1rem;
}

.arch-answer__hint {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.arch-answer__notes {
  width: 100%;
  min-height: 120px;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1.55;
  font-family: inherit;
  resize: vertical;
  margin-bottom: 1rem;
  box-sizing: border-box;
}

.arch-answer__notes:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.arch-answer__label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.arch-answer__links-wrap,
.arch-answer__images-wrap {
  margin-bottom: 1rem;
}

.arch-answer__list {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0;
}

.arch-answer__list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-border);
}

.arch-answer__list li:last-child {
  border-bottom: none;
}

.arch-answer__list a {
  color: var(--color-accent);
  text-decoration: none;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.arch-answer__list a:hover {
  text-decoration: underline;
}

.arch-answer__list-remove {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
}

.arch-answer__list-remove:hover {
  color: #c00;
}

.arch-answer__thumb-link {
  display: inline-block;
  cursor: pointer;
  text-decoration: none;
  line-height: 0;
}
.arch-answer__thumb-link:hover .arch-answer__thumb {
  opacity: 0.9;
}
.arch-answer__list--images .arch-answer__thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  display: block;
}

.arch-answer__add-row,
.arch-answer__upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.arch-answer__input {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  min-width: 0;
}

.arch-answer__input--wide {
  flex: 1;
  min-width: 120px;
}

.arch-answer__add-btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.arch-answer__add-btn:hover {
  filter: brightness(1.05);
}

.arch-answer__add-btn--secondary {
  background: var(--color-surface);
  color: var(--color-accent);
}

.arch-answer__add-btn--secondary:hover {
  background: var(--color-hero-tint);
}

.arch-answer__upload-status {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.arch-answer__save {
  margin-top: 1rem;
  padding: 0.6rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.arch-answer__save:hover {
  filter: brightness(1.05);
}

.arch-answer__save:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-accent);
}

/* Card selected state */
.kanban-card.arch-card--selected {
  box-shadow: 0 0 0 2px var(--color-accent);
  background: var(--color-card-blue);
}

/* Child topic (sub-topic) indent */
.arch-card--child {
  margin-left: 1.25rem;
  border-left: 3px solid var(--color-border);
  padding-left: 0.5rem;
}

@media (max-width: 1024px) {
  .arch-detail-panel {
    width: 340px;
  }
}

@media (max-width: 768px) {
  .arch-wrap {
    flex-direction: column;
    height: auto;
    min-height: 0;
  }

  .arch-detail-panel {
    width: 100%;
    max-height: 70vh;
  }

  .arch-detail-panel[aria-hidden="false"] {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    max-height: none;
    border-radius: 0;
  }
}