:root {
  --bg: #0e0f13;
  --panel: #171922;
  --soft: #212433;
  --text: #f3f5fb;
  --muted: #bcc3d8;
  --accent: #7aa2ff;
  --border: #2e3345;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8ff;
    --panel: #ffffff;
    --soft: #f1f4ff;
    --text: #181b25;
    --muted: #5a647f;
    --accent: #2f63ff;
    --border: #d8dff1;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

h1 {
  margin: 0;
  font-size: 22px;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.home-link {
  margin: 8px 0 0;
  font-size: 13px;
}

.home-link a {
  color: var(--accent);
  text-decoration: none;
}

.home-link a:hover {
  text-decoration: underline;
}

.meta {
  align-self: center;
  font-size: 13px;
  color: var(--muted);
  text-align: right;
  line-height: 1.4;
}

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  height: calc(100vh - 92px);
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--soft);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 12px;
  cursor: pointer;
}

.tab-btn.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}

.search-wrap {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

#searchInput {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--soft);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}

.entry-list {
  margin: 0;
  padding: 10px;
  list-style: none;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.entry-btn {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--soft);
  color: var(--text);
  padding: 10px 12px;
  text-align: left;
  cursor: pointer;
}

.entry-btn:hover {
  border-color: var(--accent);
}

.entry-btn.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}

.entry-date {
  display: block;
  font-weight: 700;
  font-size: 14px;
}

.entry-preview {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.content {
  min-height: 0;
  overflow: auto;
  background: #eef2ff;
}

.viewer-shell {
  max-width: 1024px;
  margin: 0 auto;
  padding: 20px;
}

.viewer-hint {
  margin: 0 0 12px;
  font-size: 13px;
  color: #55617d;
}

.viewer {
  min-height: calc(100vh - 170px);
  background: #ffffff;
  border: 1px solid #d0d7de;
  border-radius: 10px;
  padding: 24px 32px !important;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
}

.markdown-body {
  color: #1f2328;
}

.markdown-body pre {
  overflow: auto;
}

.focus-target {
  background: #fff8cc;
  border-radius: 6px;
  outline: 2px solid #ffd43b;
  outline-offset: 2px;
}

.empty {
  color: #6b7280;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 48vh;
  }

  .viewer {
    min-height: 52vh;
    padding: 20px !important;
  }
}