:root {
  color-scheme: light;
  --bg: #fff6de;
  --panel: #fffcf2;
  --text: #2c2a24;
  --muted: #6f6a5c;
  --faint: #9a9484;
  --line: rgba(60, 48, 22, 0.14);
  --line-strong: rgba(244, 143, 104, 0.55);
  --accent: #d9663d;
  --accent-strong: #b84d28;
  --shadow: 0 18px 50px rgba(120, 90, 40, 0.16);
  --max: 1180px;

  /* themable surfaces */
  --body-grad-top: #fff8e6;
  --body-grad-bottom: #fff1d4;
  --glow: rgba(139, 223, 221, 0.28);
  --dot: rgba(54, 42, 18, 0.16);
  --tint: rgba(244, 143, 104, 0.07);
  --tint-strong: rgba(244, 143, 104, 0.12);
  --accent-bg: rgba(139, 223, 221, 0.24);
  --accent-bg-strong: rgba(255, 227, 148, 0.55);
  --reader-text: #3a352c;
  --strong: #1f1c15;
  --quote-border: rgba(139, 223, 221, 0.75);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #2c3947;
  --panel: #344452;
  --text: #e8edf2;
  --muted: #aab4be;
  --faint: #7e8c98;
  --line: rgba(232, 237, 242, 0.12);
  --line-strong: rgba(194, 165, 109, 0.55);
  --accent: #c2a56d;
  --accent-strong: #d6ba83;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.42);

  --body-grad-top: #313f4d;
  --body-grad-bottom: #28333f;
  --glow: rgba(84, 122, 149, 0.45);
  --dot: rgba(232, 237, 242, 0.16);
  --tint: rgba(232, 237, 242, 0.04);
  --tint-strong: rgba(232, 237, 242, 0.07);
  --accent-bg: rgba(84, 122, 149, 0.45);
  --accent-bg-strong: rgba(194, 165, 109, 0.22);
  --reader-text: #dfe5ec;
  --strong: #f4f7fa;
  --quote-border: rgba(194, 165, 109, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Source Serif 4", Georgia, serif;
  background:
    radial-gradient(circle at top, var(--glow), transparent 26%),
    linear-gradient(180deg, var(--body-grad-top) 0%, var(--body-grad-bottom) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(var(--dot) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.6;
  mask-image: linear-gradient(180deg, black 0%, black 52%, transparent 92%);
  -webkit-mask-image: linear-gradient(180deg, black 0%, black 52%, transparent 92%);
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
select {
  font: inherit;
}

.page {
  position: relative;
  z-index: 1;
  width: min(calc(100vw - 24px), var(--max));
  margin: 0 auto;
  padding: 18px 0 42px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  padding: 6px 0 22px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand span:first-child {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand span:last-child {
  color: var(--faint);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
}

.repo-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--tint);
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.repo-link:hover {
  border-color: var(--line-strong);
  background: var(--accent-bg);
  color: var(--accent-strong);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--tint);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  background: var(--accent-bg);
  color: var(--accent-strong);
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.gh-icon {
  display: block;
  flex-shrink: 0;
}

.hero {
  padding: 24px 0 24px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0;
  color: var(--accent-strong);
  font-family: "VT323", monospace;
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 0.84;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-weight: 400;
}

.lede {
  max-width: 95ch;
  margin: 16px 0 0;
  color: var(--text);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.7;
}

.lede-secondary {
  margin-top: 12px;
  color: var(--muted);
  font-size: 1rem;
}

.hero-ref {
  margin-top: 18px;
  color: var(--faint);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.catalog-shell {
  padding-top: 18px;
}

.catalog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.catalog-tools {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-input {
  width: min(320px, 60vw);
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--tint);
  color: var(--text);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
}

.search-input::placeholder {
  color: var(--faint);
}

.search-input:focus {
  outline: none;
  border-color: var(--line-strong);
  background: var(--accent-bg);
}

.result-count {
  margin: 0;
  color: var(--faint);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.clear-btn {
  border: 0;
  padding: 0;
  background: none;
  color: var(--accent-strong);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
}

.clear-btn:hover {
  color: var(--text);
}

.catalog-title {
  margin: 0;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.index-panel,
.reader {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.index-panel {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.note-list {
  overflow: auto;
  padding: 8px;
}

.year-group + .year-group {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.year-heading {
  margin: 0 0 8px;
  color: var(--faint);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.year-list {
  display: grid;
  gap: 6px;
}

.note-btn {
  width: 100%;
  display: grid;
  gap: 8px;
  padding: 14px 10px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}

.note-btn:hover {
  background: var(--tint);
}

.note-btn[data-active="true"] {
  background: var(--accent-bg);
  color: var(--accent-strong);
}

.note-meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.8rem;
}

.note-meta-line time {
  color: var(--accent-strong);
}

.note-btn h3 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.02rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.reader {
  min-height: 60vh;
  padding: 24px;
}

.reader-empty {
  min-height: 60vh;
  display: grid;
  place-items: center;
  color: var(--muted);
}

.reader-article {
  display: grid;
  gap: 0;
}

.reader-head {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.reader-kicker {
  margin: 0;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.reader h2 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.8rem, 3.8vw, 3.25rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.reader-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.reader-meta time {
  color: var(--accent-strong);
}

.reader-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-chip {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.74rem;
}

.tag-chip-button {
  background: var(--tint);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
  color: var(--accent-strong);
}

.tag-chip-button:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: var(--tint-strong);
}

.tag-chip-button[data-active="true"] {
  background: var(--accent-bg-strong);
  border-color: var(--line-strong);
  color: var(--accent-strong);
}

.reader-body {
  color: var(--reader-text);
  font-size: 1.05rem;
  line-height: 1.85;
}

.reader-body p {
  margin: 0 0 1.05em;
  max-width: 74ch;
}

.reader-body p:last-child {
  margin-bottom: 0;
}

.reader-body strong {
  color: var(--strong);
  font-weight: 700;
}

.reader-body hr {
  border: 0;
  height: 1px;
  margin: 1.5em 0;
  background: var(--line);
}

.reader-body ul {
  margin: 0 0 1.1em;
  padding-left: 1.2em;
}

.reader-body li {
  margin: 0.3em 0;
}

.reader-body blockquote {
  margin: 0 0 1.2em;
  padding: 0.1em 0 0.1em 1rem;
  border-left: 2px solid var(--quote-border);
  color: var(--muted);
}

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

.reader-body code {
  padding: 0.12em 0.35em;
  border-radius: 6px;
  background: var(--tint-strong);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

.reader-section {
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.section-label {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent-strong);
  font-size: 0.9rem;
}

.empty-state {
  padding: 18px 10px;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 1100px) {
  .topbar,
  .catalog-head {
    flex-direction: column;
    align-items: stretch;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .index-panel {
    position: static;
    max-height: none;
  }
}

@media (max-width: 700px) {
  .page {
    width: min(calc(100vw - 16px), var(--max));
    padding-top: 12px;
  }

  .hero {
    padding-top: 18px;
  }

  .reader {
    padding: 18px;
  }

  .reader-body {
    font-size: 1rem;
  }
}