*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --midnight: #222034;
  --roman: #DD5F5F;
  --coral: #FF954F;
  --green: #80D35D;
  --yellow: #F7DA47;
  --purple: #BC6DE0;
  --blue: #5BB1EF;

  --bg: #222034;
  --surface: #2b2942;
  --surface-hover: #332f4e;
  --border: #3d3a58;

  --accent: var(--blue);
  --accent-dim: #3d7fb0;

  --text: #e8e6f2;
  --text-muted: #8e8aaa;
  --text-faint: #5a5775;

  --radius: 10px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

html,
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  height: 100%;
  min-height: 100vh;
}

#root {
  max-width: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  padding: 1.5rem 2.5rem 1.4rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
}

.site-brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}

.site-brand-link:hover .site-brand-name {
  color: var(--blue);
}

.site-logo {
  flex-shrink: 0;
  height: 34px;
  width: auto;
}

.site-brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.15s;
}

.site-brand-blog {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.site-subtitle {
  color: var(--text-faint);
  font-size: 0.82rem;
  white-space: nowrap;
}

#blog-layout {
  flex: 1;
  display: flex;
  overflow: hidden;
}

#content-area {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 2.5rem 4rem;
  min-width: 0;
}

#posts-sidebar {
  width: 0;
  overflow: hidden;
  border-left: 1px solid transparent;
  transition: width 0.25s ease, border-color 0.25s ease;
  flex-shrink: 0;
  overflow-y: auto;
}

#blog-layout.split-view #posts-sidebar {
  width: 260px;
  border-left-color: var(--border);
}

#sidebar-list {
  padding: 1.25rem 0;
}

.sidebar-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  width: 100%;
  background: none;
  border: none;
  border-left: 2px solid transparent;
  padding: 0.7rem 1.25rem;
  cursor: pointer;
  text-align: left;
  transition: background 0.12s, border-color 0.12s;
}

.sidebar-item:hover {
  background: var(--surface-hover);
}

.sidebar-item.active {
  border-left-color: var(--blue);
  background: var(--surface);
}

.sidebar-item-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.35;
}

.sidebar-item.active .sidebar-item-title {
  color: var(--blue);
}

.sidebar-item-date {
  font-size: 0.73rem;
  color: var(--text-faint);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.12s;
}

.post-card:hover {
  border-color: var(--blue);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.post-card:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.post-meta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.post-date {
  font-size: 0.78rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.post-author {
  font-size: 0.78rem;
  color: var(--purple);
  font-weight: 500;
}

.post-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.post-description {
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex: 1;
}

.post-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.post-tag {
  font-size: 0.72rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--bg);
  color: var(--text-faint);
  border: 1px solid var(--border);
}

.post-read-btn {
  margin-top: 0.5rem;
  align-self: flex-start;
  background: var(--blue);
  color: var(--midnight);
  border: none;
  border-radius: 6px;
  padding: 0.35rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.post-read-btn:hover {
  background: var(--accent-dim);
  color: #fff;
}

.post-action-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.back-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.share-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.share-btn--copied {
  border-color: var(--green);
  color: var(--green);
}

.post-loading {
  color: var(--text-faint);
  font-size: 0.9rem;
  padding: 2rem 0;
}

.post-error {
  color: var(--roman);
  padding: 1rem 0;
}

.prose {
  color: var(--text);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
  color: var(--text);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-top: 1.8em;
  margin-bottom: 0.6em;
}

.prose h1 {
  font-size: 1.9rem;
  margin-top: 0;
}

.prose h2 {
  font-size: 1.35rem;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
}

.prose h3 {
  font-size: 1.1rem;
}

.prose p {
  margin-bottom: 1em;
}

.prose a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: #8ed0f7;
}

.prose strong {
  color: #fff;
  font-weight: 600;
}

.prose em {
  font-style: italic;
}

.prose del {
  color: var(--text-faint);
}

.prose mark {
  background: color-mix(in srgb, var(--yellow) 25%, transparent);
  color: var(--yellow);
  border-radius: 3px;
  padding: 0 3px;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: color-mix(in srgb, var(--purple) 12%, var(--bg));
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  color: var(--purple);
}

.prose pre {
  background: color-mix(in srgb, var(--midnight) 80%, #000);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  margin: 1.25em 0;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text);
}

.prose blockquote {
  border-left: 3px solid var(--purple);
  margin: 1.25em 0;
  padding: 0.5em 1.25em;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--purple) 8%, var(--bg));
  border-radius: 0 6px 6px 0;
}

.prose blockquote p {
  margin-bottom: 0;
}

.prose ul,
.prose ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}

.prose li {
  margin-bottom: 0.3em;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25em 0;
  font-size: 0.9em;
}

.prose th,
.prose td {
  padding: 0.5em 0.9em;
  border: 1px solid var(--border);
}

.prose th {
  background: var(--bg);
  font-weight: 600;
  color: var(--blue);
}

.prose tr:nth-child(even) td {
  background: color-mix(in srgb, var(--surface) 50%, var(--bg));
}

.prose img {
  max-width: 100%;
  border-radius: 6px;
}

.prose input[type="checkbox"] {
  accent-color: var(--green);
  margin-right: 0.4em;
}

.state-message {
  text-align: center;
  color: var(--text-faint);
  padding: 5rem 0;
  font-size: 0.9rem;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}