/* ========= 全局样式 ========= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  background: #f5f5f5;
  color: #333;
}

.is-hidden {
  display: none !important;
}

/* ========= 头部 ========= */
.top {
  background: #fff;
  border-bottom: 1px solid #ddd;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top h1 {
  font-size: 1.5rem;
  font-weight: 400;
}

.reload-btn {
  padding: 0.5rem 1rem;
  background: #0366d6;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}

.reload-btn:hover {
  background: #0256c7;
}

.reload-btn:active {
  transform: scale(0.98);
}

/* ========= 主容器和卡片 ========= */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card > h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: #24292e;
  border-bottom: 1px solid #e1e4e8;
  padding-bottom: 0.5rem;
}

/* ========= 布告板标题卡片 ========= */
.hero h1 {
  font-size: 2em;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
  color: #24292e;
}

.hero-desc {
  font-size: 1rem;
  color: #24292e;
  margin: 0;
  line-height: 1.6;
  min-height: 1.6rem;
}

/* ========= Markdown 渲染区域样式 ========= */
.md {
  line-height: 1.6;
  color: #24292e;
}

.md > :first-child {
  margin-top: 0 !important;
}

.md > :last-child {
  margin-bottom: 0 !important;
}

.md h1 {
  font-size: 2em;
  font-weight: 600;
  margin: 0.5em 0;
  padding-bottom: 0.3em;
  border-bottom: 1px solid #eaecef;
}

.md h2 {
  font-size: 1.5em;
  font-weight: 600;
  margin: 0.5em 0;
  padding-bottom: 0.3em;
  border-bottom: 1px solid #eaecef;
}

.md h3 {
  font-size: 1.25em;
  font-weight: 600;
  margin: 0.5em 0;
}

.md h4 {
  font-size: 1em;
  font-weight: 600;
  margin: 0.5em 0;
}

.md h5 {
  font-size: 0.875em;
  font-weight: 600;
  margin: 0.5em 0;
}

.md h6 {
  font-size: 0.85em;
  font-weight: 600;
  margin: 0.5em 0;
  color: #6a737d;
}

.md p {
  margin: 0 0 0.5em 0;
}

.md ul,
.md ol {
  margin: 0 0 0.5em 0;
  padding-left: 2em;
}

.md li {
  margin: 0.2em 0;
}

.md blockquote {
  margin: 0 0 0.5em 0;
  padding: 0 1em;
  color: #6a737d;
  border-left: 0.25em solid #dfe2e5;
}

.md code {
  padding: 0.2em 0.4em;
  margin: 0;
  font-size: 85%;
  background-color: rgba(27, 31, 35, 0.05);
  border-radius: 3px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

.md pre {
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  background-color: #f6f8fa;
  border-radius: 6px;
  margin: 0 0 0.5em 0;
}

.md pre code {
  display: inline;
  padding: 0;
  margin: 0;
  overflow: visible;
  line-height: inherit;
  word-wrap: normal;
  background-color: transparent;
  border: 0;
  font-size: 100%;
}

.md a {
  color: #0366d6;
  text-decoration: none;
}

.md a:hover {
  text-decoration: underline;
}

.md strong {
  font-weight: 600;
}

.md em {
  font-style: italic;
}

.md hr {
  height: 0.25em;
  padding: 0;
  margin: 0.5em 0;
  background-color: #e1e4e8;
  border: 0;
}

.md table {
  border-collapse: collapse;
  margin: 0 0 0.5em 0;
  width: 100%;
}

.md table th,
.md table td {
  padding: 6px 13px;
  border: 1px solid #dfe2e5;
}

.md table th {
  font-weight: 600;
  background-color: #f6f8fa;
}

.md table tr {
  background-color: #fff;
  border-top: 1px solid #c6cbd1;
}

.md table tr:nth-child(2n) {
  background-color: #f6f8fa;
}

.md img {
  max-width: 100%;
  height: auto;
}

/* ========= 文件列表控制 ========= */
.section-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem 0;
  color: #24292e;
}

#recent-box:first-child .section-title {
  margin-top: 0;
}

/* ========= 文件列表 ========= */
.list {
  list-style: none;
  padding: 0;
}

.list li {
  padding: 0.25rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.list a {
  color: #0366d6;
  text-decoration: none;
  font-weight: 500;
}

.list a:hover {
  text-decoration: underline;
}

.list small {
  display: inline;
  color: #6a737d;
  font-size: 0.85rem;
  margin-left: 0.5rem;
}

/* ========= 更早的文件折叠区域 ========= */
.month-group {
  margin-top: 1rem;
}

.month-group summary {
  cursor: pointer;
  font-weight: 500;
  padding: 0.5rem;
  background: #f6f8fa;
  border-radius: 4px;
  user-select: none;
}

.month-group summary:hover {
  background: #e1e4e8;
}

.month-group .list {
  margin-top: 0.5rem;
}

/* ========= 调试信息 ========= */
.pre {
  background: #f6f8fa;
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.hint {
  margin-top: 1rem;
  padding: 0.75rem;
  background: #fff3cd;
  border: 1px solid #ffeaa7;
  border-radius: 4px;
  font-size: 0.9rem;
  color: #856404;
}

.hint code {
  background: rgba(0,0,0,0.05);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}