:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --border: #e2e1dc;
  --text: #24231f;
  --text-muted: #6b6a63;
  --accent: #b3541e;
  --accent-soft: #f3e4d7;
  --code-bg: #f1efe9;
  --php: #6a4fa0;
  --js: #a67c00;
  --java: #a13a3a;
  --wl: #b3541e;
  --ruby: #a01d34;
  --py: #2e6b52;
  --radius: 10px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --header-height: 130px;
}

* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  position: relative;
}

header {
  position: sticky;
  top: 0;
  left: 0;
  z-index: 10;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 18px 28px 14px;
}

header h1 {
  margin: 0 0 4px;
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

header p.sub {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

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

.wrap {
  flex-wrap: wrap;
}

.flex.horizontal {
  flex-direction: row;
}

.controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

#search {
  flex: 1;
  min-width: 220px;
  max-width: 420px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.92rem;
  background: var(--bg);
  color: var(--text);
}

#search:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

nav.toc {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex-wrap: wrap;
  align-items: start;
  font-size: 0.9rem;
}

nav.toc a {
  text-decoration: none;
  color: var(--text);
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0 5px;
  border-radius: 999px;
  font-size: 0.8rem;
  white-space: nowrap;
}

nav.toc a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

main {
  max-width: none;
  margin: 0 auto;
  padding: 1rem 28px 0;
}

section.category {
  margin-bottom: 38px;
  scroll-margin-top: var(--header-height);
}

section.category h2 {
  font-size: 1.05rem;
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

section.category h2 .count {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
}

section.category p.desc {
  margin: 0 0 14px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.table-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  width: 100%;
  overflow: hidden;
}

table {
  width: auto;
  min-width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  position: relative;
}

td::before {
  content: attr(data-lang);
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

tbody tr {
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr.group-row {
  border-bottom: none;
}

tbody tr.group-row td {
  padding: 16px 14px 6px;
  font-size: 0.7rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--panel);
}

tbody tr.group-row:first-child td {
  padding-top: 12px;
}

tbody tr.task-row {
  border-bottom: none;
}

tbody tr.task-row td {
  padding: 16px 14px 4px;
  font-weight: 600;
  color: var(--text);
  font-size: 0.82rem;
  background: var(--panel);
}

tbody tr.task-row:first-child td {
  padding-top: 14px;
}

tbody tr.hidden {
  display: none;
}

td:first-of-type {
  padding-left: 14px;
}

td {
  padding: 12px 14px 1.5rem 0;
  vertical-align: top;
  font-size: 0.84rem;
}

td.task {
  font-weight: 600;
  color: var(--text);
  font-size: 0.82rem;
  width: 320px;
}

.lang-row td {
  width: 16.6%;
}

td code.snippet {
  display: block;
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--code-bg);
  border-radius: 6px;
  padding: 7px 9px 7px;
  white-space: pre-wrap;
  word-break: break-word;
  color: #2c2b26;
  transition: all 2ms ease-in-out;
  cursor: pointer;
  position: relative;
  padding-right: 3rem;
  max-width: 600px;
}

td code.copied {
  background-color: lightgreen;
  transition: all 2ms ease-in-out;
}

td p.note {
  margin: 0;
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.4;
  overflow-wrap: break-word;
  word-break: break-word;
}

td p.note code {
  overflow-wrap: break-word;
  word-break: break-word;
}

td dl.note {
  margin: 0 0 1rem;
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.4;
}

td dl.note dt {
  font-weight: 650;
  color: var(--text);
  margin-top: 6px;
}

td dl.note dt:first-child {
  margin-top: 0;
}

td dl.note dd {
  margin: 0 0 0 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

#empty-state {
  display: none;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

pre {
  margin: 0.2rem 0;
}

a:not(:hover) {
  color: var(--accent);
  text-decoration: none;
}

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

a[target="_blank"]::after {
  content: " \2197";
  color: var(--text-muted);
  font-size: 0.8rem;
}

.back-to-top {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 100;

  /* Hidden by default */
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px 30px;
  color: var(--text-muted);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  header,
  main {
    padding-top: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

  .sub {
    margin-top: 0;
  }

  table,
  thead,
  tbody,
  tr,
  td {
    display: block;
  }

  colgroup {
    display: none;
  }

  thead {
    display: none;
  }

  tbody tr {
    padding: 10px 14px 4px;
    border-bottom: 1px solid var(--border);
  }

  td:first-of-type {
    padding-left: 0;
  }

  td {
    padding: 6px 0;
  }

  td.task {
    padding-top: 8px;
    font-size: 0.88rem;
  }

  tbody tr.group-row {
    padding: 0;
    border-bottom: none;
  }

  tbody tr.group-row td::before {
    content: none;
  }

  tbody tr.task-row {
    padding: 10px 14px 0;
    border-bottom: none;
  }

  tbody tr.task-row td {
    padding: 0;
  }

  tbody tr.task-row td::before {
    content: none;
  }

  tbody tr.lang-row {
    padding-top: 4px;
  }

  tbody tr.lang-row td {
    width: 100%;
  }
}