/* The landing page dresses like the product: the `ledger` theme's ink on
   a terminal-dark ground, monospace throughout, no gradients and no
   rounded-everything. Colours below are lifted from crates/margin-tui/
   src/theme.rs so the site and the TUI cannot drift apart visually. */

:root {
  --bg: #0f1115;
  --bg-raised: #161a20;
  --bg-sunken: #0a0c10;
  --rule: #262c35;
  --ink: #d6dbe3;
  --ink-dim: #8b94a3;
  --ink-faint: #5d6675;
  --add: #6fe3a1;        /* addition ink */
  --add-tint: #0d3318;   /* addition tint */
  --del: #ff8a8a;
  --del-tint: #3d1517;
  --accent: #7fd1ff;     /* hunk headers */
  --note: #d8b26a;       /* review notes */
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --measure: 68ch;
  --page: 1180px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfaf7;         /* foolscap: paper */
    --bg-raised: #ffffff;
    --bg-sunken: #f1efe9;
    --rule: #ddd8cc;
    --ink: #23252b;
    --ink-dim: #5c6270;
    --ink-faint: #8a8a8a;
    --add: #1a6a2e;
    --add-tint: #dcf2dc;
    --del: #9c1f23;
    --del-tint: #f8dcdc;
    --accent: #1d4ed8;
    --note: #8a5a00;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

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

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem; top: 1rem; z-index: 10;
  background: var(--bg-raised); padding: .5rem .75rem; border: 1px solid var(--rule);
}

/* ---------- chrome ---------- */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: var(--page);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark { font-weight: 700; letter-spacing: .02em; }
.wordmark .bar { color: var(--add); margin-right: .1em; }

.top nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.top nav a { color: var(--ink-dim); text-decoration: none; }
.top nav a:hover { color: var(--ink); text-decoration: underline; }
.top nav a.gh { color: var(--ink); }

main { max-width: var(--page); margin: 0 auto; padding: 0 1.5rem; }

section { padding: 3.5rem 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: 0; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .75rem; }
h1 { font-size: clamp(1.9rem, 5vw, 3rem); letter-spacing: -0.02em; }
h1 em { font-style: normal; color: var(--add); }
h2 { font-size: 1.15rem; color: var(--ink-dim); font-weight: 600; text-transform: lowercase; letter-spacing: .08em; margin-bottom: 1.5rem; }
h3 { font-size: 1rem; color: var(--ink); }

p { margin: 0 0 1rem; max-width: var(--measure); }
.lede { color: var(--ink-dim); font-size: 1.05rem; max-width: 56ch; }

/* ---------- hero + install ---------- */

.hero { padding-top: 3rem; }

.install-row {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 1.75rem 0 .75rem;
  max-width: 46rem;
  border: 1px solid var(--rule);
  background: var(--bg-sunken);
}
.install-row code {
  flex: 1 1 auto;
  padding: .7rem .9rem;
  overflow-x: auto;
  white-space: nowrap;
  color: var(--ink);
}
.install-row code::before { content: "$ "; color: var(--add); }
.install-row button {
  flex: 0 0 auto;
  border: 0;
  border-left: 1px solid var(--rule);
  background: var(--bg-raised);
  color: var(--ink-dim);
  font: inherit;
  padding: 0 1rem;
  cursor: pointer;
}
.install-row button:hover { color: var(--ink); background: var(--rule); }

.alt-install { color: var(--ink-faint); font-size: .85rem; max-width: none; }
.alt-install code { color: var(--ink-faint); word-break: break-all; }

/* ---------- demo ---------- */

.demo figure { margin: 0; }
.demo img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  background: var(--bg-sunken);
}
.demo figcaption {
  margin-top: .9rem;
  color: var(--ink-dim);
  font-size: .9rem;
  max-width: var(--measure);
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1.5rem;
}
.cards article {
  border: 1px solid var(--rule);
  border-left: 2px solid var(--add);
  background: var(--bg-raised);
  padding: 1.25rem 1.4rem;
}
.cards article:nth-child(2) { border-left-color: var(--del); }
.cards article:nth-child(3) { border-left-color: var(--accent); }
.cards article:nth-child(4) { border-left-color: var(--note); }
.cards p { font-size: .93rem; color: var(--ink-dim); }
.cards p:last-child { margin-bottom: 0; }
.cards em { font-style: normal; color: var(--ink); }

/* ---------- keys ---------- */

.keygrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: .6rem 1.25rem;
}
.keygrid div { display: flex; align-items: baseline; gap: .4rem; }
.keygrid span { color: var(--ink-dim); font-size: .9rem; }

kbd {
  display: inline-block;
  min-width: 1.7em;
  text-align: center;
  padding: .1em .4em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  background: var(--bg-sunken);
  color: var(--ink);
  font-size: .85em;
}

/* ---------- usage block ---------- */

.usage pre {
  margin: 0;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--rule);
  background: var(--bg-sunken);
  overflow-x: auto;
  font-size: .9rem;
  line-height: 1.75;
}
.usage .c { color: var(--ink-faint); }

.more { margin-top: 1rem; font-size: .9rem; color: var(--ink-dim); }

/* ---------- comparison ---------- */

.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: .55rem .8rem; border-bottom: 1px solid var(--rule); white-space: nowrap; }
thead th { color: var(--ink-dim); font-weight: 600; }
thead th:nth-child(2) { color: var(--add); }
tbody th { font-weight: 400; color: var(--ink); }
td.y { color: var(--add); }
td.n { color: var(--ink-faint); }
td.p { color: var(--note); }

/* ---------- contribute ---------- */

.cta-row { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.25rem; }
.cta {
  display: inline-block;
  padding: .6rem 1.1rem;
  border: 1px solid var(--add);
  background: var(--add-tint);
  color: var(--add);
  text-decoration: none;
}
.cta:hover { background: var(--add); color: var(--bg); }
.cta.ghost { border-color: var(--rule); background: transparent; color: var(--ink-dim); }
.cta.ghost:hover { border-color: var(--ink-dim); background: var(--bg-raised); color: var(--ink); }

/* ---------- footer ---------- */

footer {
  max-width: var(--page);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: .85rem;
}
footer p { max-width: none; margin: 0; }

@media (max-width: 40rem) {
  section { padding: 2.5rem 0; }
  .install-row { flex-direction: column; }
  .install-row button { border-left: 0; border-top: 1px solid var(--rule); padding: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}