/* ============================================================
   coreutil(1) — Unix man-page / roff documentation aesthetic
   warm off-white paper · serif body · mono flags · hanging
   indents · running header & footer · restrained ink
   ============================================================ */

:root {
  /* warm "printed manual" paper palette */
  --paper:    #f4efe3;   /* warm off-white page */
  --paper-2:  #ece5d4;   /* slightly deeper panel paper */
  --ink:      #2a2620;   /* warm near-black ink */
  --ink-soft: #5c554a;   /* secondary ink / captions */
  --ink-faint:#8a8174;   /* faint ink / rules */
  --rule:     #cdc4b0;   /* hairline rule on paper */
  --rule-2:   #b9ae95;   /* darker rule */
  --acc:      #8a2f1d;   /* oxblood — the one warm accent (flags, links) */
  --acc-soft: #a8533f;   /* lighter oxblood */
  --ok:       #3f6b3a;   /* muted ink-green for "synced/ok" */
  --hl:       #f0e6c8;   /* highlighter wash */
  --hl-edge:  #d8c98f;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono:  "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --maxw: 860px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  /* faint horizontal "ruled paper" texture + warm vignette */
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 27px,
      rgba(138,129,116,0.045) 27px,
      rgba(138,129,116,0.045) 28px
    ),
    radial-gradient(120% 80% at 50% -10%, rgba(255,255,255,0.45), transparent 60%);
  background-attachment: fixed, fixed;
  -webkit-font-smoothing: antialiased;
}

/* ---------- running header / footer (the man-page frame) ---------- */
.manhead, .manfoot {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  padding: 10px max(20px, 6vw);
  border-bottom: 1px solid var(--rule);
}
.manfoot {
  border-bottom: none;
  border-top: 1px solid var(--rule);
  margin-top: 40px;
}
.mh-l { text-align: left; font-weight: 700; }
.mh-c { text-align: center; }
.mh-r { text-align: right; font-weight: 700; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px max(20px, 6vw);
  background: rgba(244,239,227,0.92);
  backdrop-filter: blur(4px);
  border-bottom: 2px solid var(--ink);
}
.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand .prompt { color: var(--acc); }
.navlinks {
  display: flex;
  gap: 16px;
  margin-left: auto;
  flex-wrap: wrap;
}
.navlinks a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}
.navlinks a:hover { color: var(--acc); border-bottom-color: var(--acc); }
.ghstars {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--acc);
  text-decoration: none;
  border: 1px solid var(--rule-2);
  padding: 4px 9px;
  border-radius: 2px;
  white-space: nowrap;
}
.ghstars:hover { background: var(--hl); }

/* ---------- page / sheet ---------- */
main { padding: 0 0 10px; }

.page {
  display: flex;
  justify-content: center;
  padding: 30px max(16px, 5vw) 6px;
}
.sheet {
  width: 100%;
  max-width: var(--maxw);
}

/* section headers — bold, uppercase, roff .SH style flush-left */
.sec {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 30px 0 8px;
  padding-bottom: 4px;
}
.hero .sec:first-child { margin-top: 4px; }

/* hanging / indented paragraphs — the roff .TP / .PP feel */
.hang {
  margin: 0 0 14px;
  padding-left: 3.2em;
  text-indent: -3.2em;     /* hanging first line */
  max-width: 68ch;
}
.hang.synopsis {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.9;
  padding-left: 4.5em;
  text-indent: -4.5em;
}

b, strong { font-weight: 700; color: var(--ink); }
i, em { font-style: italic; color: var(--acc-soft); }
u { text-decoration: none; border-bottom: 1px dotted var(--ink-faint); }

a.lnk { color: var(--acc); text-decoration: none; border-bottom: 1px solid var(--hl-edge); }
a.lnk:hover { border-bottom-color: var(--acc); }

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.5px 5px;
  color: var(--acc);
}

/* highlighter wash for key numbers */
.hl {
  background: linear-gradient(transparent 55%, var(--hl) 55%);
  padding: 0 1px;
  font-weight: 600;
}

/* ---------- install one-liner ---------- */
.install {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 22px 0 26px;
  max-width: 66ch;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  background: var(--paper-2);
  overflow: hidden;
  box-shadow: 3px 3px 0 var(--rule-2);
}
.install-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  display: flex;
  align-items: center;
  padding: 0 12px;
}
.install code {
  flex: 1;
  background: none;
  border: none;
  color: var(--ink);
  display: flex;
  align-items: center;
  padding: 11px 14px;
  font-size: 14px;
}
.install code::before { content: "$ "; color: var(--acc); }
.copybtn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  border: none;
  border-left: 1px solid var(--rule-2);
  background: var(--paper);
  color: var(--acc);
  cursor: pointer;
  padding: 0 16px;
}
.copybtn:hover { background: var(--hl); }

/* ---------- terminal demo ---------- */
.term {
  margin: 8px 0 6px;
  max-width: 70ch;
  border: 1.5px solid var(--rule-2);
  border-radius: 5px;
  background: #f8f4ea;
  box-shadow: 4px 4px 0 var(--rule);
  overflow: hidden;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}
.term-bar .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--rule-2);
  border: 1px solid var(--ink-faint);
}
.term-title {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
}
.term-body {
  margin: 0;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 200px;
}
.tp { color: var(--acc); font-weight: 700; }
.tc { color: var(--ink); }
.tl.out .tc, .out { color: var(--ink-soft); }
.tl.dim .tc { color: var(--ink-faint); font-style: italic; }
.tl.acc .tc { color: var(--ok); }
.caret { color: var(--acc); animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- options / definition list (roff .TP) ---------- */
.opts { margin: 6px 0 4px; }
.opts dt {
  font-family: var(--mono);
  font-size: 14px;
  margin-top: 16px;
  color: var(--ink);
}
.opts dt b { color: var(--acc); }     /* bold flag listings */
.opts dt .argline { color: var(--ink-soft); font-size: 13px; margin-left: 6px; }
.opts dt .argline i { color: var(--acc-soft); }
.opts dd {
  margin: 4px 0 0 3.2em;
  max-width: 64ch;
  color: var(--ink);
}

/* ---------- benchmarks pre ---------- */
.bench, pre.bench {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  background: var(--paper-2);
  border: 1px solid var(--rule-2);
  border-left: 3px solid var(--acc);
  border-radius: 2px;
  padding: 16px 18px;
  overflow-x: auto;
  color: var(--ink);
  margin: 8px 0 22px;
}

.statrow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 6px 0 8px;
}
.stat {
  border: 1px solid var(--rule);
  border-top: 2px solid var(--ink);
  background: var(--paper-2);
  padding: 14px 12px;
  text-align: center;
}
.stat .num {
  display: block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 24px;
  color: var(--acc);
  line-height: 1.1;
}
.stat .num small { font-size: 13px; color: var(--ink-soft); }
.stat .lbl {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ---------- pricing ---------- */
.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 12px 0 6px;
}
.plan {
  position: relative;
  border: 1px solid var(--rule-2);
  background: var(--paper-2);
  border-radius: 3px;
  padding: 20px 18px 18px;
}
.plan.featured {
  border: 2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--rule-2);
}
.ribbon {
  position: absolute;
  top: -11px; left: 18px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--acc);
  color: var(--paper);
  padding: 3px 9px;
  border-radius: 2px;
}
.plan h3 {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  margin: 0 0 6px;
  color: var(--ink);
}
.plan .price {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 30px;
  color: var(--acc);
  margin: 0 0 12px;
}
.plan .price span { font-size: 14px; color: var(--ink-soft); font-weight: 400; }
.plan ul {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  font-size: 14.5px;
}
.plan ul li {
  padding: 4px 0 4px 18px;
  position: relative;
  border-bottom: 1px dotted var(--rule);
}
.plan ul li::before {
  content: "·";
  position: absolute; left: 4px;
  color: var(--acc);
  font-weight: 700;
}
.plannote { font-size: 13px; color: var(--ink-soft); font-style: italic; margin: 0; }
.foot-note { margin-top: 18px; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- quotes ---------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 10px 0 6px;
}
.quotes blockquote {
  margin: 0;
  border-left: 3px solid var(--acc);
  background: var(--paper-2);
  padding: 14px 16px;
}
.quotes blockquote p { margin: 0 0 10px; font-size: 15px; }
.quotes cite {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.quotes cite span { color: var(--ink-faint); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .navlinks { display: none; }
  .statrow { grid-template-columns: repeat(2, 1fr); }
  .pricing, .quotes { grid-template-columns: 1fr; }
  .mh-c { display: none; }
  .manhead, .manfoot { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .hang { padding-left: 1.6em; text-indent: -1.6em; }
  .hang.synopsis { padding-left: 1.8em; text-indent: -1.8em; }
  .opts dd { margin-left: 1.2em; }
  .install { flex-wrap: wrap; }
  .install-label { width: 100%; padding: 4px 12px; }
  .statrow { grid-template-columns: 1fr 1fr; }
  .term-body { font-size: 12px; }
}