:root {
  --red: #c1272d;
  --red-dark: #a02026;
  --red-light: #e8494f;
  --white: #fff;
  --light: #f4f4f2;
  --light-gray: #e8e8e4;
  --medium-gray: #c8c8c4;
  --gray: #888;
  --dark: #444;
  --darker: #1a1a1a;

  --sans-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono-font: "JetBrains Mono", "SF Mono", SFMono-Regular, ui-monospace, "DejaVu Sans Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --border-radius: 4px;
  --diff-add: #2e7d32;
  --diff-del: #c62828;
}

[data-theme="dark"] {
  color-scheme: dark;
  --red: #e8494f;
  --red-dark: #c1272d;
  --red-light: #f06a6f;
  --white: #0d0d0d;
  --light: #1a1a1a;
  --light-gray: #2a2a2a;
  --medium-gray: #3a3a3a;
  --gray: #888;
  --dark: #ccc;
  --darker: #eee;
  --diff-add: #66bb6a;
  --diff-del: #ef5350;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark light;
    --red: #e8494f;
    --red-dark: #c1272d;
    --red-light: #f06a6f;
    --white: #0d0d0d;
    --light: #1a1a1a;
    --light-gray: #2a2a2a;
    --medium-gray: #3a3a3a;
    --gray: #888;
    --dark: #ccc;
    --darker: #eee;
    --diff-add: #66bb6a;
    --diff-del: #ef5350;
  }
}

html {
  background: var(--white);
  -webkit-text-size-adjust: none;
  font-family: var(--sans-font);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.6;
}

pre, code, kbd, samp {
  font-family: var(--mono-font);
}

::selection {
  background: var(--red);
  color: #fff;
  opacity: 0.85;
}

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

body {
  max-width: 1000px;
  padding: 0 20px;
  margin: 0 auto 60px;
  border-top: 6px solid var(--red);
}

/* ── Typography ── */

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
  padding: 1.5rem 0 0.25rem;
}

h2 {
  font-size: 1.5rem;
  padding: 1.25rem 0 0.25rem;
}

h3 {
  font-size: 1.1rem;
  padding: 1.5rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray);
  font-weight: 600;
}

strong {
  font-weight: 600;
}

/* ── Header ── */

header {
  padding: 1rem 0 0.5rem;
}

header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  padding: 0;
}

header h1 a {
  color: var(--darker);
  border: none;
}

header h1 a:hover {
  border: none;
  color: var(--red);
}

header h2 {
  font-size: 1.3rem;
  font-weight: 700;
  padding: 0.5rem 0 0;
}

header .ref {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gray);
  display: inline-block;
  padding-top: 0.2em;
  letter-spacing: 0;
}

header .desc {
  color: var(--gray);
  font-weight: 400;
  font-style: italic;
  font-size: 1rem;
  padding: 0.25rem 0 0.5rem;
}

/* ── Navigation ── */

nav {
  padding: 0.5rem 0 1.5rem;
  border-bottom: 2px solid var(--light-gray);
  margin-bottom: 0.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

nav ul li {
  display: inline;
}

nav ul li a {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--darker);
  border: 2px solid var(--medium-gray);
  border-radius: var(--border-radius);
  transition: all 0.15s ease;
}

nav ul li a:hover {
  color: var(--red);
  border-color: var(--red);
}

nav ul li:first-child a {
  border-color: var(--red);
  color: var(--red);
}

nav ul li:first-child a:hover {
  background: var(--red);
  color: #fff;
}

/* ── Links ── */

a {
  text-decoration: none;
  color: var(--darker);
  word-wrap: break-word;
  transition: color 0.15s ease;
}

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

main a {
  font-weight: 500;
}

main a:hover {
  border-bottom: 2px solid var(--red);
}

/* ── Index Page ── */

.index {
  padding-top: 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-row-gap: 0.15em;
  min-width: 0;
}

.index-name {
  font-weight: 600;
  font-size: 1.05rem;
  padding: 0.4rem 0;
}

.index-name a {
  border-left: 3px solid var(--red);
  padding-left: 0.75rem;
  transition: border-width 0.1s ease;
}

.index-name a:hover {
  border-left-width: 6px;
  color: var(--red);
  border-bottom: none;
}

.index-idle {
  text-align: right;
  color: var(--gray);
  font-size: 0.85rem;
  font-family: var(--mono-font);
  padding: 0.5rem 0;
  grid-column: 2;
}

.index .desc {
  grid-column: 1 / -1;
  font-weight: 400;
  color: var(--gray);
  font-style: italic;
  font-size: 0.9rem;
  padding: 0 0 0.6rem 1rem;
  border-bottom: 1px solid var(--light-gray);
  margin-bottom: 0.2rem;
  min-height: 1.2em;
}

.index > div:nth-child(3n) {
  grid-column: 1 / -1;
}

.index > div:nth-child(3n-1) {
  grid-column: 2;
}

.index > div:nth-child(1) {
  grid-column: 1;
}

.index > div:nth-child(2) {
  grid-column: 2;
}

/* clone url */

.clone-url {
  padding: 2rem 0 0.5rem;
}

.clone-url strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray);
  padding-bottom: 0.4rem;
}

.clone-url pre {
  background: var(--light);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  border-left: 3px solid var(--red);
  font-size: 0.85rem;
  color: var(--dark);
  white-space: pre-wrap;
  overflow-x: auto;
}

/* ── File Tree ── */

.tree {
  display: grid;
  grid-template-columns: minmax(10ch, auto) 8ch 1fr;
  grid-row-gap: 0.15em;
  grid-column-gap: 1em;
  min-width: 0;
}

.tree > div {
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--light-gray);
}

.tree > div:nth-child(3n+1) {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  color: var(--gray);
}

.tree > div:nth-child(3n+2) {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  color: var(--gray);
  text-align: right;
}

.tree > div:nth-child(3n) {
  font-weight: 500;
}

.tree > div:nth-child(3n) a {
  border-bottom: 1px solid transparent;
}

.tree > div:nth-child(3n) a:hover {
  border-bottom: 1px solid var(--red);
}

.mode, .size {
  font-family: var(--mono-font);
}

.size {
  text-align: right;
}

/* ── Commit Log ── */

.log {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-row-gap: 0;
}

.log > div {
  padding: 0.6rem 0;
}

.log > div:nth-child(4n+1),
.log > div:nth-child(4n+2) {
  border-bottom: 1px solid var(--light-gray);
  padding-bottom: 0.8rem;
}

.log > div:nth-child(4n+3) {
  grid-column: 1;
}

.log > div:nth-child(4n+4) {
  grid-column: 2;
}

.log > div:nth-child(4n+3),
.log > div:nth-child(4n+4) {
  border-bottom: 1px solid var(--light-gray);
  padding-top: 0;
}

.log > div:nth-child(1),
.log > div:nth-child(2) {
  padding-top: 0;
}

.commit-hash {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--red);
}

.commit-hash:hover {
  text-decoration: underline;
}

.log > div:nth-child(4n+1) pre {
  font-family: var(--sans-font);
  font-weight: 600;
  font-size: 1rem;
  padding-top: 0.2rem;
  white-space: pre-wrap;
  overflow: hidden;
}

.log > div:nth-child(4n+2),
.log > div:nth-child(4n+4) {
  text-align: right;
  font-size: 0.8rem;
  color: var(--gray);
  padding-top: 0.1rem;
  line-height: 1.4;
  max-width: 22rem;
  overflow-wrap: break-word;
}

.log > div:nth-child(4n+2) .commit-email,
.log > div:nth-child(4n+4) .commit-email {
  display: none;
}



/* ── Readme ── */

.readme {
  margin: 2rem 0 1rem;
  padding: 1.5rem;
  background: var(--light);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--red);
}

.readme h1,
.readme h2,
.readme h3 {
  text-transform: none;
  letter-spacing: 0;
  color: var(--darker);
}

.readme h1 { font-size: 1.5rem; }
.readme h2 { font-size: 1.25rem; }
.readme h3 { font-size: 1.1rem; }

.readme pre {
  white-space: pre-wrap;
  overflow-x: auto;
  background: var(--white);
  padding: 0.75rem;
  border-radius: 3px;
  font-size: 0.85rem;
}

.readme ul {
  padding: revert;
}

.readme img {
  max-width: 100%;
}

.readme a {
  color: var(--red);
  font-weight: 500;
}

.readme a:hover {
  border-bottom: 2px solid var(--red);
}

.readme code {
  font-size: 0.85em;
  background: var(--white);
  padding: 0.15em 0.3em;
  border-radius: 3px;
}

/* ── Diff / Commit ── */

.diff {
  margin: 1.5rem 0;
  padding: 1rem 0 1rem;
  border-top: 2px solid var(--light-gray);
}

.diff:first-child {
  border-top: none;
}

.diff pre {
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
  background: var(--light);
  padding: 1rem;
  margin-top: 0.5rem;
  border-radius: var(--border-radius);
}

.diff-stat {
  padding: 1rem 0;
  font-size: 0.9rem;
  color: var(--dark);
}

.diff-stat div:first-child {
  font-weight: 600;
  padding-bottom: 0.5rem;
}

.diff-stat strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray);
  padding: 0.5rem 0 0.25rem;
}

.diff-stat ul {
  list-style: none;
}

.diff-stat ul li {
  padding-left: 0.5em;
  font-size: 0.85rem;
  line-height: 1.6;
}

.diff-stat ul li a {
  font-weight: 400;
}

.commit-hash {
  font-family: var(--mono-font);
}

.commit-email {
  font-family: var(--mono-font);
  font-size: 0.85em;
  color: var(--gray);
}

.commit-email:before {
  content: "<";
}

.commit-email:after {
  content: ">";
}

.commit {
  margin-bottom: 1.5rem;
}

.commit pre {
  font-family: var(--sans-font);
  font-weight: 600;
  font-size: 1.1rem;
  padding-bottom: 0.75rem;
  white-space: pre-wrap;
}

.commit-info {
  color: var(--gray);
  padding-bottom: 1.5rem;
  font-size: 0.85rem;
  line-height: 1.6;
}

.commit .commit-info {
  padding-bottom: 0;
}

.commit strong {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray);
  min-width: 5rem;
}

.commit p {
  display: inline;
  font-family: var(--mono-font);
  font-size: 0.85rem;
  word-break: break-all;
}

.commit p a {
  font-weight: 400;
}

.diff-add {
  color: var(--diff-add);
}

.diff-del {
  color: var(--diff-del);
}

.diff-noop {
  color: var(--gray);
}

.diff-type {
  display: inline-block;
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: var(--light-gray);
  color: var(--dark);
  margin-right: 0.5rem;
}

/* ── Refs (branches & tags) ── */

.refs {
  margin-bottom: 1rem;
}

.refs > div {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--light-gray);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.refs > div:hover {
  background: var(--light);
}

.refs strong {
  font-family: var(--mono-font);
  font-size: 0.9rem;
  font-weight: 600;
  min-width: 12rem;
}

.refs a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray);
}

.refs a:hover {
  color: var(--red);
}

.refs pre {
  width: 100%;
  font-size: 0.85rem;
  white-space: pre-wrap;
  color: var(--gray);
  padding: 0.5rem 0 0;
}

/* ── File View ── */

.line-numbers {
  white-space: pre-line;
  -moz-user-select: -moz-none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  -o-user-select: none;
  user-select: none;
  display: flex;
  float: left;
  flex-direction: column;
  margin-right: 1ch;
  font-size: 0.8rem;
  color: var(--gray);
  text-align: right;
  padding-right: 0.75rem;
  border-right: 2px solid var(--light-gray);
  min-width: 3.5rem;
}

.line-numbers a {
  color: var(--gray);
  font-weight: 400;
}

.line-numbers a:hover {
  color: var(--red);
  border: none;
}

.file-wrapper {
  display: flex;
  flex-direction: row;
  grid-template-columns: 1rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.5rem;
  background: var(--light);
  border-radius: var(--border-radius);
  border: 1px solid var(--light-gray);
  overflow-x: auto;
}

.chroma-file-wrapper {
  display: flex;
  flex-direction: row;
  grid-template-columns: 1rem minmax(0, 1fr);
  overflow-x: auto;
  padding: 0.5rem;
  background: var(--light);
  border-radius: var(--border-radius);
  border: 1px solid var(--light-gray);
}

.file-content {
  background: var(--light);
  overflow-y: hidden;
  overflow-x: auto;
  font-size: 0.85rem;
}

.file-content pre {
  white-space: pre;
}

main > p:first-child {
  font-size: 0.9rem;
  color: var(--gray);
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--light-gray);
  margin-bottom: 1rem;
}

main > p:first-child a {
  color: var(--red);
  font-weight: 500;
}

/* ── Error Pages ── */

main h3:only-child {
  text-align: center;
  padding: 3rem 0;
  font-size: 1.3rem;
  color: var(--gray);
  text-transform: none;
  letter-spacing: 0;
}

/* ── Responsive ── */

@media (max-width: 600px) {
  body {
    padding: 0 12px;
  }

  h1 {
    font-size: 1.5rem;
  }

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

  .index-name {
    border-bottom: 1px solid var(--light-gray);
  }

  .index .desc {
    padding-bottom: 0.6rem;
    margin-bottom: 0;
  }

  .index-idle {
    grid-column: 1;
    text-align: left;
    padding: 0 0 0.5rem 1rem;
    border-bottom: 1px solid var(--light-gray);
  }

  .index > div:nth-child(3n),
  .index > div:nth-child(3n-1),
  .index > div:nth-child(1),
  .index > div:nth-child(2) {
    grid-column: 1;
  }

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

  .log > div:nth-child(4n+3) {
    grid-column: 1;
  }

  .log > div:nth-child(4n+4) {
    grid-column: 1;
  }

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

  .tree > div:nth-child(3n+1),
  .tree > div:nth-child(3n+2) {
    display: none;
  }

  pre {
    font-size: 0.8rem;
  }

  nav ul {
    gap: 0.2rem;
  }

  nav ul li a {
    font-size: 0.78rem;
    padding: 0.2rem 0.6rem;
  }

  .refs strong {
    min-width: 8rem;
    font-size: 0.85rem;
  }

  .commit {
    font-size: 0.9rem;
  }

  header h1 {
    font-size: 1.6rem;
  }

  header h2 {
    font-size: 1.1rem;
  }
}

/* ── Theme Toggle ── */

#theme-toggle {
  font: inherit;
  cursor: pointer;
  background: none;
  border: 2px solid var(--medium-gray);
  border-radius: var(--border-radius);
  padding: 0.3rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--darker);
  transition: all 0.15s ease;
  line-height: inherit;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

#theme-toggle:hover {
  color: var(--red);
  border-color: var(--red);
}

#theme-toggle.theme-system::before { content: "🖥"; }
#theme-toggle.theme-light::before  { content: "☀"; }
#theme-toggle.theme-dark::before   { content: "☾"; }

.theme-label {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray);
  display: flex;
  align-items: center;
  padding-right: 0.3rem;
}