:root {
  color-scheme: light;
  --bg: #f6f4ef;
  --panel: #fffdf8;
  --panel-strong: #ffffff;
  --ink: #25221d;
  --muted: #706b61;
  --line: #ded8cb;
  --accent: #146c64;
  --accent-strong: #0f514b;
  --accent-soft: #d8ebe7;
  --gold: #a77018;
  --code-bg: #f0ede5;
  --error: #b42318;
  --shadow: 0 18px 45px rgba(50, 43, 31, 0.12);
  font-family:
    "Inter", "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC",
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(246, 244, 239, 0) 260px),
    var(--bg);
}

button,
input {
  font: inherit;
}

a {
  color: var(--accent-strong);
}

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 22px;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}

.brand h1,
.panel-heading h2,
.reader-empty h2 {
  margin: 3px 0 0;
  line-height: 1.18;
}

.brand h1 {
  font-size: 30px;
}

.eyebrow {
  margin: 0;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.repo-link,
.ghost-button {
  min-height: 36px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-strong);
  background: var(--panel-strong);
  text-decoration: none;
  cursor: pointer;
}

.repo-link:hover,
.ghost-button:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.catalog-toggle {
  display: none;
  width: 100%;
  min-height: 42px;
  margin: 0 0 16px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--panel-strong);
  background: var(--accent);
  font-weight: 800;
  cursor: pointer;
}

.catalog-toggle:hover {
  background: var(--accent-strong);
}

.search-box {
  display: grid;
  gap: 8px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.search-box input {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--panel-strong);
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20, 108, 100, 0.14);
}

.category-list {
  display: grid;
  gap: 8px;
}

.category-button,
.note-button {
  width: 100%;
  border: 0;
  color: inherit;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.category-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 42px;
  padding: 9px 11px;
  border-radius: 8px;
  color: var(--muted);
}

.category-button:hover,
.category-button.active {
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.category-count {
  flex: 0 0 auto;
  min-width: 28px;
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  text-align: center;
}

.content {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: 28px;
  width: 100%;
  max-width: 1480px;
  margin: 0 auto;
  padding: 28px;
}

.note-list-panel {
  min-width: 0;
  align-self: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-heading h2 {
  font-size: 24px;
}

.status-message {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.status-message.error {
  color: var(--error);
}

.note-list {
  display: grid;
  gap: 10px;
}

.note-button {
  display: grid;
  min-height: 58px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

.note-button:hover,
.note-button.active {
  border-color: var(--accent);
  background: #f8fffd;
}

.note-title {
  color: var(--ink);
  font-weight: 800;
  line-height: 1.4;
}

.reader {
  min-width: 0;
  padding: 38px min(5vw, 72px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
}

.reader-empty {
  display: grid;
  place-content: center;
  min-height: 48vh;
  color: var(--muted);
  text-align: center;
}

.reader-empty h2 {
  color: var(--ink);
  font-size: 30px;
}

.reader-loading,
.reader-error {
  padding: 18px;
  border-radius: 8px;
  background: var(--code-bg);
}

.reader-error {
  color: var(--error);
}

.article-meta {
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.markdown-body {
  max-width: 820px;
  margin: 0 auto;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.85;
}

.markdown-body:empty {
  display: none;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--ink);
  line-height: 1.35;
}

.markdown-body h1 {
  margin: 0 0 24px;
  font-size: 34px;
}

.markdown-body h2 {
  margin: 34px 0 12px;
  padding-top: 8px;
  font-size: 25px;
}

.markdown-body h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.markdown-body h4 {
  margin: 22px 0 8px;
  font-size: 17px;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre,
.markdown-body table {
  margin: 0 0 18px;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.35em;
}

.markdown-body li + li {
  margin-top: 6px;
}

.markdown-body blockquote {
  padding: 12px 18px;
  border-left: 4px solid var(--accent);
  color: #48443d;
  background: #f3faf7;
}

.markdown-body code {
  padding: 2px 5px;
  border-radius: 6px;
  background: var(--code-bg);
  font-family: "Cascadia Code", Consolas, "SFMono-Regular", monospace;
  font-size: 0.92em;
}

.markdown-body pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 8px;
  background: #272822;
  color: #f8f8f2;
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  font-size: 15px;
}

.markdown-body th,
.markdown-body td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.markdown-body th {
  background: var(--code-bg);
}

.hidden {
  display: none !important;
}

@media (max-width: 1100px) {
  .app-shell,
  .content {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .category-list {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  }
}

@media (max-width: 680px) {
  .sidebar,
  .content {
    padding: 18px;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 253, 248, 0.97);
  }

  .brand {
    align-items: flex-start;
    margin-bottom: 14px;
  }

  .brand h1 {
    font-size: 24px;
  }

  .catalog-toggle {
    display: block;
  }

  .catalog-collapsed .search-box,
  .catalog-collapsed .category-list,
  .catalog-collapsed .note-list-panel {
    display: none;
  }

  .catalog-open .search-box,
  .catalog-open .category-list {
    display: grid;
  }

  .panel-heading {
    align-items: stretch;
  }

  .content {
    gap: 18px;
  }

  .reader,
  .note-list-panel {
    padding: 18px;
  }

  .markdown-body {
    font-size: 16px;
  }

  .markdown-body h1 {
    font-size: 28px;
  }
}