/* KeepAI — paper-and-ink editorial, mirrored from vellum ui/theme/Color.kt. */

:root {
  --paper-bright: #fdfbf6;
  --paper: #f8f4ec;
  --paper-deep: #f0e9db;
  --ink: #1d1812;
  --ink-soft: #5c5547;
  --ink-faint: #8e8674;
  --hairline: #e5dccb;
  --vermilion: #b5471d;
  --vermilion-deep: #8e3414;
  --on-vermilion: #fff6ec;
  --moss: #5f7150;

  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  --measure: 68ch;
  --shell: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper-bright: #09090b;
    --paper: #000000;
    --paper-deep: #18181b;
    --ink: #ffffff;
    --ink-soft: #b6b6bd;
    --ink-faint: #8a8a93;
    --hairline: #26262a;
    --vermilion: #e4682f;
    --vermilion-deep: #ff8a52;
    --on-vermilion: #14100b;
    --moss: #5fbe7e;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper-bright);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.shell {
  width: min(100% - 2.5rem, var(--shell));
  margin-inline: auto;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.6rem, 7vw, 4.5rem); }
h2 { font-size: clamp(1.9rem, 4vw, 2.7rem); }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; }

p { margin: 0 0 1em; max-width: var(--measure); }

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

.eyebrow {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 1.1rem;
}

/* ---- Header ---------------------------------------------------------- */

header.site {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper-bright) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

header.site .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 0;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.seal {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--vermilion);
  flex: none;
}

nav.site a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.94rem;
  margin-left: 1.5rem;
}
nav.site a:hover { color: var(--ink); }

@media (max-width: 720px) {
  nav.site { display: none; }
}

/* ---- Hero ------------------------------------------------------------ */

.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 6vw, 4rem); }

.hero .rule {
  width: 88px;
  height: 5px;
  background: var(--vermilion);
  margin: 1.6rem 0 1.8rem;
}

.lede {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--ink-soft);
  max-width: 52ch;
}

.chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 2rem 0 0; padding: 0; list-style: none; }

.chips li {
  border: 1px solid var(--hairline);
  background: var(--paper);
  border-radius: 999px;
  padding: 0.45rem 1.05rem;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.2rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.85rem 1.7rem;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary { background: var(--vermilion); color: var(--on-vermilion); }
.btn-primary:hover { background: var(--vermilion-deep); color: var(--on-vermilion); }

.btn-quiet { border-color: var(--hairline); color: var(--ink); background: var(--paper); }
.btn-quiet:hover { color: var(--ink); border-color: var(--ink-faint); }

.note { font-size: 0.88rem; color: var(--ink-faint); margin-top: 1.1rem; }

/* ---- Sections -------------------------------------------------------- */

section { padding: clamp(3rem, 7vw, 5.5rem) 0; border-top: 1px solid var(--hairline); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(258px, 1fr));
  gap: 1.6rem;
  margin-top: 2.6rem;
}

.card {
  border: 1px solid var(--hairline);
  background: var(--paper);
  border-radius: 20px;
  padding: 1.6rem 1.5rem;
}

.card h3 { margin-bottom: 0.4rem; }
.card p { color: var(--ink-soft); margin: 0; font-size: 0.97rem; }

.card .mark {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--vermilion);
  margin-bottom: 1.1rem;
}

/* ---- Screenshot rail ------------------------------------------------- */

.rail {
  display: flex;
  gap: 1.2rem;
  overflow-x: auto;
  padding: 2.6rem 0 1rem;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.rail img {
  flex: none;
  width: min(76vw, 292px);
  border-radius: 22px;
  border: 1px solid var(--hairline);
  scroll-snap-align: start;
  background: var(--paper);
}

/* ---- Engine table ---------------------------------------------------- */

.table-wrap { overflow-x: auto; margin-top: 2.4rem; }

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 560px;
  font-size: 0.96rem;
}

th, td {
  text-align: left;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

thead th {
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
}

tbody th { font-weight: 600; color: var(--ink); width: 34%; }
td { color: var(--ink-soft); }

/* ---- Statement + price ---------------------------------------------- */

.statement {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  max-width: 22ch;
  color: var(--ink);
}

.price-card {
  border: 1px solid var(--hairline);
  border-radius: 26px;
  background: var(--paper);
  padding: clamp(1.8rem, 4vw, 2.8rem);
  max-width: 480px;
  margin-top: 2.4rem;
}

.price-figure {
  font-family: var(--serif);
  font-size: clamp(3rem, 8vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

.price-figure small {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  display: block;
  margin-top: 0.7rem;
}

.ticks { list-style: none; padding: 0; margin: 1.6rem 0 0; }
.ticks li { padding-left: 1.6rem; position: relative; color: var(--ink-soft); margin-bottom: 0.5rem; }
.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--vermilion);
}

/* ---- FAQ ------------------------------------------------------------- */

details {
  border-bottom: 1px solid var(--hairline);
  padding: 1.1rem 0;
}
details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.03rem;
  list-style: none;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; float: right; color: var(--vermilion); font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { margin: 0.9rem 0 0; color: var(--ink-soft); }

/* ---- Prose (legal pages) -------------------------------------------- */

.prose { padding: clamp(3rem, 7vw, 5rem) 0; max-width: 74ch; }
.prose h2 { margin-top: 2.4rem; font-size: 1.6rem; }
.prose ul { color: var(--ink-soft); padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }
.prose .stamp { color: var(--ink-faint); font-size: 0.92rem; }

.callout {
  border: 1px solid var(--vermilion);
  border-radius: 16px;
  padding: 1.1rem 1.3rem;
  background: color-mix(in srgb, var(--vermilion) 8%, transparent);
}
.callout p { margin: 0; color: var(--ink); }

/* ---- Footer ---------------------------------------------------------- */

footer.site {
  border-top: 1px solid var(--hairline);
  padding: 3rem 0 4rem;
  color: var(--ink-faint);
  font-size: 0.92rem;
}

footer.site .rows { display: flex; flex-wrap: wrap; gap: 1.4rem; justify-content: space-between; }
footer.site a { color: var(--ink-soft); text-decoration: none; margin-right: 1.4rem; }
footer.site a:hover { color: var(--ink); }