.project-timeline-relations {
  --relation-ink: #315b47;
  --relation-muted: #6a8172;
  gap: 8px;
}

.project-timeline-relations .timeline-relations-list {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 9px;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 2px 5px 12px;
  scrollbar-width: thin;
  scrollbar-color: #aac4b2 transparent;
}

.project-timeline-relations .timeline-relation-group {
  flex: 0 0 auto;
  min-width: 0;
  overflow: hidden;
  border: 1px solid #d4e3d8;
  border-radius: 12px;
  background: linear-gradient(145deg, #f8fbf9, #ecf4ef);
  box-shadow: inset 0 1px #fff, 0 3px 10px #264c3507;
}

.project-timeline-relations .timeline-relation-group.is-expanded {
  border-color: #accdb8;
  background: #f5faf7;
}

.project-timeline-relations .timeline-relation-group.is-related { border-color: #7eaf94; }

.project-timeline-relations .timeline-relation-group-head {
  display: flex;
  align-items: center;
  min-width: 0;
}

.project-timeline-relations .timeline-relation-group-head > button {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  gap: 7px;
  min-height: 46px;
  padding: 9px 8px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--relation-ink);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
}

.project-timeline-relations .timeline-relation-group-head > button > span {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow-wrap: anywhere;
}

.project-timeline-relations .timeline-relation-group-head svg {
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  transition: transform 150ms ease;
}

.project-timeline-relations .is-expanded .timeline-relation-group-head svg { transform: rotate(90deg); }

.project-timeline-relations .timeline-relation-group-head > .timeline-relation-rename {
  flex: 0 0 40px;
  justify-content: center;
  padding: 8px;
  color: var(--relation-muted);
  font-size: 17px;
  font-weight: 400;
}

.project-timeline-relations .timeline-relation-members {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 3px 6px 8px;
}

.project-timeline-relations .timeline-relation-member {
  position: relative;
  flex: 0 0 auto;
  min-width: 0;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 9px;
  background: #ffffff70;
  touch-action: pan-y;
}

.project-timeline-relations .timeline-relation-member.is-current {
  border-color: #acd2ba;
  background: #e1f1e7;
}

.project-timeline-relations .timeline-relation-member.is-source {
  border-color: #60ae88;
  background: #d6efdf;
  box-shadow: inset 3px 0 #3a9970, inset 0 1px #ffffffc9;
}

.project-timeline-relations .timeline-relation-member-open {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 100%;
  min-height: 62px;
  padding: 9px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--relation-ink);
  text-align: left;
  transition: transform 150ms ease;
}

.project-timeline-relations .timeline-relation-member-title {
  width: 100%;
  overflow: hidden;
  color: var(--relation-ink);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-timeline-relations .timeline-relation-member-summary {
  display: -webkit-box;
  width: 100%;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  color: #567260;
  font-size: 11px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.project-timeline-relations .timeline-relation-member-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  width: 100%;
  min-width: 0;
  margin-top: 3px;
  color: var(--relation-muted);
  font-size: 10px;
  line-height: 1.4;
}
.project-timeline-relations .timeline-relation-member-meta {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.project-timeline-relations .timeline-relation-member-meta time { flex: 0 0 auto; }
.project-timeline-relations .timeline-relation-member-meta > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.project-timeline-relations .timeline-relation-member-indicators { display: flex; flex: 0 0 auto; align-items: center; gap: 6px; }
.project-timeline-relations .timeline-relation-member-indicators svg { display: block; width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }

.project-timeline-app .project-timeline-event.is-relation-current,
.project-timeline-app .project-timeline-personal-card-main.is-relation-current {
  outline: 2px solid #60a984;
  outline-offset: 3px;
}

.project-timeline-relations .timeline-relation-member-open time {
  color: var(--relation-muted);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

.project-timeline-relations .timeline-relation-member-remove {
  position: absolute;
  inset: 0 0 0 auto;
  width: 64px;
  min-height: 44px;
  border: 0;
  border-radius: 0 8px 8px 0;
  background: #a34f4a;
  color: #fff;
  font-size: 12px;
  transform: translateX(101%);
  transition: transform 150ms ease;
}

.project-timeline-relations .is-remove-revealed .timeline-relation-member-open { transform: translateX(-64px); }
.project-timeline-relations .is-remove-revealed .timeline-relation-member-remove,
.project-timeline-relations .timeline-relation-member-remove:focus-visible { transform: translateX(0); }
.project-timeline-relations .timeline-relation-group-head > button:hover,
.project-timeline-relations .timeline-relation-member-open:hover { background: #dceee459; }

.project-timeline-relations .timeline-relations-status {
  display: block;
  min-height: 44px;
  margin: 0;
  padding: 12px 10px;
  border: 0;
  background: transparent;
  color: var(--relation-muted);
  font-size: 12px;
  text-align: left;
}
.project-timeline-relations .timeline-relations-status.is-error { color: #994d43; }

.project-timeline-relations .timeline-relation-context-menu {
  position: fixed;
  z-index: 30;
  min-width: 148px;
  padding: 5px;
  border: 1px solid #d7e3d9;
  border-radius: 10px;
  background: #f6faf7;
  box-shadow: 0 8px 25px #24463226;
}
.project-timeline-relations .timeline-relation-context-menu button {
  width: 100%;
  min-height: 44px;
  padding: 9px 12px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #98463e;
  font-size: 13px;
  text-align: left;
}
.project-timeline-relations .timeline-relation-context-menu button:hover { background: #f4e5e1; }

.project-timeline-app .project-timeline-relation-cancel[hidden],
.project-timeline-relation-cursor[hidden] { display: none !important; }
.project-timeline-app .project-timeline-view-controls .project-timeline-relation-cancel {
  width: auto;
  min-width: 72px;
  min-height: 38px;
  padding: 6px 10px;
  color: #286b4f;
  font-size: 12px;
  font-weight: 600;
}

.project-timeline-modal-layer .project-timeline-detail-actions > .project-timeline-relation-action { flex: 0 0 auto; }
.project-timeline-modal-layer .project-timeline-relation-action.is-target {
  position: relative;
  isolation: isolate;
  border-color: #90d6b8 !important;
  background: linear-gradient(135deg, #2d7e60, #246149) !important;
  color: #f2fff8 !important;
  box-shadow: inset 0 1px #e8fff066, 0 0 0 2px #74d6ae26, 0 0 18px #51c79a77;
  animation: timeline-relation-halo 1.8s ease-in-out infinite;
}
.project-timeline-modal-layer .project-timeline-relation-action.is-target::after {
  position: absolute;
  z-index: -1;
  inset: -5px;
  border: 1px solid #8ae8c088;
  border-radius: inherit;
  content: "";
  pointer-events: none;
}
.project-timeline-modal-layer .project-timeline-relation-head-cancel {
  min-width: 0;
  min-height: 44px;
  padding: 8px 11px;
  font-size: 12px;
  white-space: nowrap;
}
.project-timeline-relation-cursor {
  position: fixed;
  z-index: 120;
  top: 0;
  left: 0;
  width: 30px;
  height: 30px;
  border: 1px solid #70d8b7c9;
  border-radius: 50%;
  background: radial-gradient(circle, #a3efd626, transparent 70%);
  box-shadow: 0 0 12px #5bd5ad77, inset 0 0 8px #76debc55;
  pointer-events: none;
}

.project-timeline-modal-layer .timeline-relation-pair {
  margin: 0 0 10px;
  color: inherit;
  font-size: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.project-timeline-modal-layer .timeline-relation-pair > span { padding: 0 5px; opacity: .7; }
.project-timeline-modal-layer .timeline-relation-choices {
  display: grid;
  gap: 5px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}
.project-timeline-modal-layer .timeline-relation-choices legend { margin-bottom: 8px; font-size: 13px; }
.project-timeline-modal-layer .timeline-relation-choices label {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 5px 8px;
  border-radius: 8px;
  line-height: 1.5;
  cursor: pointer;
}
.project-timeline-modal-layer .timeline-relation-choices label:hover { background: #ffffff0c; }
.project-timeline-modal-layer .timeline-relation-choices input { flex: 0 0 auto; width: 17px; height: 17px; accent-color: #70cfaa; }
.project-timeline-modal-layer .timeline-relation-choices input:disabled + span { opacity: .5; }
.project-timeline-modal-layer [data-relation-name-field][hidden] { display: none !important; }
.project-timeline-modal-layer [data-relation-name-field] { margin-top: 12px; }

@keyframes timeline-relation-halo {
  0%, 100% { box-shadow: inset 0 1px #e8fff066, 0 0 0 2px #74d6ae26, 0 0 13px #51c79a55; }
  50% { box-shadow: inset 0 1px #e8fff088, 0 0 0 3px #74d6ae40, 0 0 24px #51c79a99; }
}

@media (max-width: 720px) {
  .project-timeline-app .project-timeline-view-controls { flex-wrap: wrap; max-width: calc(100% - 24px); }
  .project-timeline-app .project-timeline-view-controls .project-timeline-relation-cancel { min-height: 44px; }
  .project-timeline-relations.is-mobile .project-timeline-directory-head > button { min-width: 44px; min-height: 44px; }
  .project-timeline-modal-layer .project-timeline-detail-actions { flex-wrap: wrap; }
  .project-timeline-modal-layer .project-timeline-relation-head-cancel { padding: 7px 8px; font-size: 11px; }
}

@media (hover: none) { .project-timeline-relation-cursor { display: none !important; } }
@media (prefers-reduced-motion: reduce) {
  .project-timeline-modal-layer .project-timeline-relation-action.is-target { animation: none; }
  .project-timeline-relations .timeline-relation-member-open,
  .project-timeline-relations .timeline-relation-member-remove,
  .project-timeline-relations .timeline-relation-group-head svg { transition: none; }
}