/* ============ Lines 时间线（hooks/timeline_pages.py + js/timeline.js） ============ */

/* ---------- 聚合页容器（Hero 使用 extra.css 的统一 .page-hero 组件） ---------- */
.tl-shell {
  max-width: 72rem;
  margin: 0 auto;
}

/* ---------- 时间线应用容器 ---------- */
.tl-app {
  position: relative;
  margin: 0.6rem 0 2rem;
}

/* ---------- 标签筛选栏 ---------- */
.tl-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 0.9rem;
}

.tl-badge {
  padding: 0.32rem 0.8rem;
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 16%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--md-primary-fg-color) 12%, transparent);
  color: var(--md-default-fg-color);
  font-family: inherit;
  font-size: 0.72rem;
  line-height: 1.5;
  cursor: pointer;
  user-select: none;
  transition: opacity 180ms ease, border-color 180ms ease,
    background-color 180ms ease, transform 180ms ease;
}

.tl-badge:hover {
  border-color: color-mix(in srgb, var(--md-accent-fg-color) 45%, transparent);
  transform: translateY(-1px);
}

.tl-badge:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

.tl-badge.is-off {
  background: transparent;
  opacity: 0.45;
}

.tl-badge--invert {
  border-style: dashed;
  background: transparent;
  color: var(--md-default-fg-color--light);
}

/* ---------- 时间线图例 ---------- */
.tl-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0 0 1rem;
}

.tl-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--md-default-fg-color--light) !important;
  font-size: 0.74rem;
  text-decoration: none !important;
  transition: color 180ms ease, opacity 180ms ease;
}

.tl-chip:hover {
  color: var(--md-default-fg-color) !important;
}

.tl-chip.is-off {
  opacity: 0.4;
  text-decoration: line-through !important;
}

.tl-chip-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--tl-chip-color, var(--md-primary-fg-color));
  box-shadow: 0 0 0 3px
    color-mix(in srgb, var(--tl-chip-color, var(--md-primary-fg-color)) 22%, transparent);
}

/* ---------- 时间线主体 ---------- */
.tl-stage {
  position: relative;
}

.tl-track {
  position: relative;
  padding: 0.8rem 0 1rem;
}

/* 中央竖线 */
.tl-track::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: calc(50% - 1px);
  width: 2px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--md-default-fg-color) 18%, transparent);
}

.tl-track.is-empty::before {
  display: none;
}

.tl-row {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 4.8rem minmax(0, 1fr);
  align-items: start;
  padding: 0.3rem 0;
}

.tl-side {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0 0.7rem;
}

.tl-side:empty {
  display: none;
}

.tl-side--left {
  grid-column: 1;
  align-items: flex-end;
  text-align: right;
}

.tl-side--right {
  grid-column: 3;
  align-items: flex-start;
  text-align: left;
}

/* 年份节点 */
.tl-point {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.18rem;
  padding-top: 0.14rem;
}

.tl-point-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--tl-dot-color, var(--tl-color, var(--md-primary-fg-color)));
  box-shadow: 0 0 0 3px color-mix(
    in srgb,
    var(--tl-dot-color, var(--tl-color, var(--md-primary-fg-color))) 25%,
    transparent
  );
}

.tl-point-year {
  padding: 0.02rem 0.3rem;
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--md-default-bg-color) 82%, transparent);
  backdrop-filter: blur(6px);
  font-family: "Ubuntu", monospace;
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

/* ---------- 条目卡片 ---------- */
.tl-card {
  max-width: 100%;
  padding: 0.35rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 12px;
  transition: border-color 200ms ease, background-color 200ms ease;
}

.tl-card:hover {
  border-color: color-mix(in srgb, var(--tl-card-color) 30%, transparent);
  background: color-mix(in srgb, var(--tl-card-color) 5%, transparent);
}

.tl-card.is-active {
  border-color: color-mix(in srgb, var(--tl-card-color) 42%, transparent);
  background: color-mix(in srgb, var(--tl-card-color) 9%, transparent);
}

.tl-card-name {
  display: inline;
  margin: 0;
  padding: 0 0 1px;
  border: none;
  border-bottom: 1px dashed color-mix(in srgb, var(--tl-card-color) 55%, transparent);
  background: none;
  color: var(--tl-card-color);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  transition: border-color 180ms ease;
}

.tl-card-name:hover,
.tl-card.is-active .tl-card-name {
  border-bottom-style: solid;
}

.tl-card-name:focus-visible {
  outline: 2px solid var(--tl-card-color);
  outline-offset: 2px;
  border-radius: 4px;
}

.tl-card-range {
  margin-left: 0.3rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.66rem;
  font-weight: 400;
  white-space: nowrap;
}

.tl-card-content {
  margin-top: 0.12rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.68rem;
  line-height: 1.65;
}

.tl-card-content a {
  color: var(--tl-card-color);
  white-space: nowrap;
}

/* ---------- 起止点连接线 ---------- */
.tl-connector {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.tl-connector line {
  stroke-width: 5;
  stroke-linecap: round;
  opacity: 0.5;
}

/* ---------- 空状态 ---------- */
.tl-empty {
  margin: 2rem 0;
  color: var(--md-default-fg-color--light);
  font-size: 0.8rem;
  text-align: center;
}

/* ---------- 移动端：全部卡片收到轴线右侧 ---------- */
@media (max-width: 768px) {
  .tl-track::before {
    left: calc(1.7rem - 1px);
  }

  .tl-row {
    grid-template-columns: 3.4rem minmax(0, 1fr);
  }

  .tl-point {
    grid-column: 1;
  }

  .tl-side--left,
  .tl-side--right {
    grid-column: 2;
    align-items: flex-start;
    text-align: left;
    padding: 0 0.2rem 0 0.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tl-badge,
  .tl-chip,
  .tl-card,
  .tl-card-name {
    transition: none;
  }
}