/* ============================================
   Fragment Timeline - 碎碎念时间轴样式
   简约、优雅的左侧时间轴设计
   支持 Fluid 主题亮色/暗色模式
   ============================================ */

/* 容器 */
.fragment-timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

/* ---- 年份标签 ---- */
.fragment-year-section {
  position: relative;
  margin-bottom: 0.5rem;
}

.fragment-year-label {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 52px;
}

.fragment-year-label span {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #1a202c;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 4px 0;
}

/* ---- 时间线轴线 ---- */
.fragment-items {
  position: relative;
  padding-left: 52px;
}

.fragment-items::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #e2e8f0, #cbd5e0);
  border-radius: 1px;
}

/* ---- 单条内容 ---- */
.fragment-item {
  position: relative;
  margin-bottom: 2rem;
  animation: fragmentFadeIn 0.4s ease-out both;
}

/* 圆点 */
.fragment-dot {
  position: absolute;
  left: -39px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid #667eea;
  z-index: 1;
  transition: all 0.25s ease;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.fragment-item:hover .fragment-dot {
  background: #667eea;
  box-shadow: 0 0 0 5px rgba(102, 126, 234, 0.2);
  transform: scale(1.2);
}

/* 日期 */
.fragment-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: #8e99a4;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

/* 内容卡片 */
.fragment-content {
  background: #fff;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #4a5568;
  border: 1px solid #edf2f7;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: all 0.3s ease;
  word-break: break-word;
}

.fragment-content:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-color: #e2e8f0;
  transform: translateY(-1px);
}

.fragment-content p {
  margin: 0;
  line-height: 1.8;
}

.fragment-content p + p {
  margin-top: 0.5em;
}

/* 内容中的链接 */
.fragment-content a {
  color: #667eea;
  text-decoration: none;
  border-bottom: 1px dashed #667eea;
  transition: all 0.2s;
}

.fragment-content a:hover {
  color: #764ba2;
  border-bottom-style: solid;
}

/* 内容中的 emoji 等大号文字保持原样 */
.fragment-content img.emoji {
  display: inline;
  margin: 0 2px;
  vertical-align: -0.1em;
}

/* ---- 渐入动画 ---- */
@keyframes fragmentFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fragment-item:nth-child(1) { animation-delay: 0.05s; }
.fragment-item:nth-child(2) { animation-delay: 0.1s; }
.fragment-item:nth-child(3) { animation-delay: 0.15s; }
.fragment-item:nth-child(4) { animation-delay: 0.2s; }
.fragment-item:nth-child(5) { animation-delay: 0.25s; }
.fragment-item:nth-child(6) { animation-delay: 0.3s; }

/* ============================================
   暗色模式适配
   Fluid 主题使用 html[data-user-color-scheme="dark"]
   ============================================ */

html[data-user-color-scheme="dark"] .fragment-year-label span {
  background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

html[data-user-color-scheme="dark"] .fragment-items::before {
  background: linear-gradient(to bottom, #3a4553, #2d3748);
}

html[data-user-color-scheme="dark"] .fragment-dot {
  background: #252d38;
  border-color: #a78bfa;
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

html[data-user-color-scheme="dark"] .fragment-item:hover .fragment-dot {
  background: #a78bfa;
  box-shadow: 0 0 0 5px rgba(167, 139, 250, 0.25);
}

html[data-user-color-scheme="dark"] .fragment-date {
  color: #8899aa;
}

html[data-user-color-scheme="dark"] .fragment-content {
  background: #2a3444;
  border-color: #374152;
  color: #c9cdd4;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

html[data-user-color-scheme="dark"] .fragment-content:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  border-color: #475569;
}

html[data-user-color-scheme="dark"] .fragment-content a {
  color: #a78bfa;
  border-bottom-color: #a78bfa;
}

html[data-user-color-scheme="dark"] .fragment-content a:hover {
  color: #c084fc;
}

/* ============================================
   响应式适配
   ============================================ */

@media (max-width: 768px) {
  .fragment-timeline {
    padding: 0.5rem 0 1.5rem;
  }

  .fragment-year-label {
    padding-left: 42px;
  }

  .fragment-items {
    padding-left: 42px;
  }

  .fragment-items::before {
    left: 15px;
  }

  .fragment-dot {
    left: -33px;
    width: 10px;
    height: 10px;
    border-width: 2.5px;
  }

  .fragment-content {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    border-radius: 10px;
  }

  .fragment-year-label span {
    font-size: 1.1rem;
  }

  .fragment-date {
    font-size: 0.75rem;
  }
}

/* ---- 去除 markdown-body 对内部样式的干扰 ---- */
.markdown-body .fragment-timeline h2 {
  border-bottom: none;
  padding-bottom: 0;
  margin-top: 0;
  margin-bottom: 0;
}

.markdown-body .fragment-timeline {
  font-size: inherit;
}

.markdown-body .fragment-content p:first-child {
  margin-top: 0;
}

.markdown-body .fragment-content p:last-child {
  margin-bottom: 0;
}