/* Restart · 刷题记录 */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e4e7ec;
  --text: #1a2233;
  --text-2: #5b6474;
  --text-3: #9099a8;
  --accent: #0e7490;
  --accent-strong: #155e75;
  --code-bg: #0f172a;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 14px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

.inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 主内容容器(列表/详情/错误视图共用) */
#list-view, #detail-view, #error-view {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 顶栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: .5px;
}
.brand-mark { color: var(--accent); }
.brand-sub {
  font-weight: 500;
  font-size: 13px;
  color: var(--text-3);
}
.header-meta { font-size: 13px; color: var(--text-3); }

/* ===== 首屏 ===== */
.hero { padding: 44px 0 8px; }
.hero h1 {
  margin: 0;
  font-size: clamp(26px, 5vw, 34px);
  letter-spacing: 1px;
}
.hero-sub {
  margin: 6px 0 0;
  color: var(--text-2);
  font-size: 15px;
}

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  padding: 24px 0 56px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: #bcd9e2;
}
.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.card-no {
  font-weight: 800;
  font-size: 15px;
  color: var(--accent-strong);
  letter-spacing: .5px;
}
.card-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 12px;
  color: var(--accent-strong);
  background: #ecf6f9;
  border: 1px solid #d4e9ef;
  border-radius: 999px;
  padding: 1px 10px;
}
.card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
  font-size: 12.5px;
  color: var(--text-3);
}
.badge {
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  padding: 2px 10px;
}
.badge.done   { color: #067647; background: #ecfdf3; border: 1px solid #abefc6; }
.badge.re     { color: #b54708; background: #fffaeb; border: 1px solid #fedf89; }
.badge.fail   { color: #b42318; background: #fef3f2; border: 1px solid #fecdca; }

.loading, .error-box {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-3);
  padding: 60px 0;
}
.error-box .btn { margin-top: 14px; }

/* ===== 详情页 ===== */
.back {
  display: inline-block;
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--text-2);
  text-decoration: none;
}
.back:hover { color: var(--accent-strong); }

.detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 14px 0 56px;
  padding: clamp(20px, 4vw, 40px);
}

.detail-header { margin-bottom: 8px; }
.detail-header .no-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.detail-header .no {
  font-weight: 800;
  color: var(--accent-strong);
  letter-spacing: .5px;
}
.detail-header h1 {
  margin: 0 0 10px;
  font-size: clamp(22px, 4.5vw, 30px);
  line-height: 1.3;
}
.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 13px;
  color: var(--text-2);
  align-items: center;
}
.meta-line .tag { font-size: 12.5px; }

/* ===== Markdown 正文 ===== */
.markdown-body { font-size: 15.5px; }
.markdown-body h1 { font-size: 1.5em; }
.markdown-body h2 {
  margin: 1.8em 0 .7em;
  font-size: 1.28em;
  padding-bottom: .3em;
  border-bottom: 1px solid var(--border);
}
.markdown-body h3 { margin: 1.5em 0 .5em; font-size: 1.12em; }
.markdown-body p { margin: .8em 0; }
.markdown-body ul, .markdown-body ol { padding-left: 1.4em; }
.markdown-body li { margin: .35em 0; }
.markdown-body blockquote {
  margin: 1em 0;
  padding: .4em 1em;
  border-left: 4px solid #bcd9e2;
  background: #f4fafc;
  color: var(--text-2);
  border-radius: 0 8px 8px 0;
}
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}
.markdown-body a { color: var(--accent-strong); }

/* 行内代码 */
.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
  background: #eef1f4;
  border-radius: 5px;
  padding: .15em .45em;
}

/* 代码块(深色) */
.markdown-body pre {
  background: var(--code-bg);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  line-height: 1.6;
}
.markdown-body pre code {
  background: none;
  padding: 0;
  color: #e2e8f0;
  font-size: 13.5px;
  display: block;
  white-space: pre;
}

/* highlight.js 主题(github-dark 色板精简) */
.hljs-comment, .hljs-quote { color: #8b949e; font-style: italic; }
.hljs-keyword, .hljs-selector-tag { color: #ff7b72; }
.hljs-string, .hljs-attr { color: #a5d6ff; }
.hljs-number, .hljs-literal { color: #79c0ff; }
.hljs-title, .hljs-name, .hljs-function .hljs-title { color: #d2a8ff; }
.hljs-built_in, .hljs-type, .hljs-class .hljs-title { color: #ffa657; }

/* 表格 */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1em 0; }
.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  min-width: 480px;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.markdown-body th { background: #f2f4f7; font-weight: 700; }
.markdown-body tr:nth-child(even) td { background: #fafbfc; }

/* ===== 页脚 ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--text-3);
  font-size: 13px;
}

/* ===== 移动端 ===== */
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; gap: 12px; padding-bottom: 40px; }
  .hero { padding-top: 30px; }
  .header-meta { display: none; }
  .detail { padding: 18px 16px 24px; border-radius: 12px; }
  .markdown-body { font-size: 15px; }
  .markdown-body pre { padding: 13px; border-radius: 8px; }
  .markdown-body pre code { font-size: 12.5px; }
}