:root {
  --ink: #141613;
  --paper: #f4f1ea;
  --card: #fffcf8;
  --muted: #5e615a;
  --line: #e0dbd1;
  --green: #1c6b4a;
  --green-soft: #e8f3ec;
  --panel: #141613;
  --panel-text: #f4f1ea;
  --sans: Outfit, system-ui, sans-serif;
  --serif: Fraunces, Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}
.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 20px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  cursor: pointer;
}
.btn:hover { background: #000; }
.btn-ghost {
  display: inline-block;
  border: 1px solid var(--ink);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
}
.btn-ghost:hover { background: #fff; }

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 241, 234, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}
.brand { font-family: var(--serif); font-size: 22px; font-weight: 560; letter-spacing: -0.03em; }
.navlinks { display: flex; gap: 22px; align-items: center; font-size: 14px; color: var(--muted); }
.navlinks a:hover { color: var(--ink); }
@media (max-width: 720px) {
  .navlinks a:not(.btn) { display: none; }
  header nav {
    height: auto;
    min-height: 68px;
    padding-top: 12px;
    padding-bottom: 12px;
    flex-wrap: wrap;
    row-gap: 10px;
  }
  .navlinks {
    flex: 1 1 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
  }
}

.hero { padding: 72px 0 28px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: end;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(40px, 5.6vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  max-width: 12ch;
  margin-top: 14px;
}
.hero .lede {
  margin-top: 22px;
  font-size: 18px;
  color: var(--muted);
  max-width: 42ch;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; align-items: center; }

.stack-panel {
  background: var(--panel);
  color: var(--panel-text);
  border-radius: 20px;
  padding: 8px;
}
.stack-panel a {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 8px;
  padding: 18px 18px 16px;
  border-radius: 14px;
}
.stack-panel a:hover { background: rgba(255, 255, 255, 0.06); }
.stack-panel .n {
  font-family: var(--serif);
  color: #8dceae;
  font-size: 16px;
}
.stack-panel .copy strong { display: block; font-size: 17px; font-weight: 600; color: var(--panel-text); }
.stack-panel .copy em {
  display: block;
  margin-top: 4px;
  color: #c8c6bf;
  font-style: normal;
  font-size: 14px;
  line-height: 1.4;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding-top: 40px; }
}

section { padding: 72px 0; }
h2 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(32px, 4vw, 46px);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 10px 0 14px;
}
.sec-lede { color: var(--muted); max-width: 52ch; font-size: 17px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 32px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.card h3 { font-family: var(--serif); font-weight: 560; font-size: 28px; letter-spacing: -0.03em; margin: 10px 0 8px; }
.card p { color: var(--muted); font-size: 15px; }
.card ul { margin: 16px 0 20px 18px; font-size: 14.5px; }
.card li { margin: 7px 0; }
.card .btn { margin-top: auto; text-align: center; }
@media (max-width: 860px) { .cards { grid-template-columns: 1fr; } }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
.step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
}
.step b {
  display: block;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 560;
  color: var(--green);
  margin-bottom: 8px;
}
.step h3 { font-size: 18px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 15px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 8px; }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }
.split > div {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
}
.split h3 { font-family: var(--serif); font-weight: 560; font-size: 26px; margin-bottom: 12px; }
.split li { margin: 8px 0 8px 18px; }

.band { background: var(--green-soft); border-radius: 18px; padding: 22px 24px; margin-top: 28px; color: var(--ink); }
.band p { max-width: 70ch; }

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; }
.faq p { margin-top: 10px; color: var(--muted); max-width: 68ch; }

form.app {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  max-width: 640px;
}
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .row { grid-template-columns: 1fr; } }
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
.field textarea { min-height: 110px; resize: vertical; }
form .btn { width: 100%; text-align: center; border: 0; }
.fine { margin-top: 12px; font-size: 13px; color: var(--muted); }
.fine a { text-decoration: underline; }

.doc { max-width: 720px; margin: 0 auto; padding: 48px 24px 96px; }
.doc h1 { font-family: var(--serif); font-weight: 560; font-size: 44px; letter-spacing: -0.03em; margin: 12px 0 8px; }
.doc .meta { color: var(--muted); font-size: 14px; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.doc h2 { font-family: var(--serif); font-weight: 560; font-size: 26px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--muted); margin-bottom: 12px; }
.doc ul { margin-left: 20px; }
.doc a { text-decoration: underline; }
.doc strong { color: var(--ink); }

footer { border-top: 1px solid var(--line); padding: 40px 0 32px; font-size: 14px; color: var(--muted); }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot a { text-decoration: underline; }
.legal { margin-top: 24px; font-size: 12.5px; max-width: 78ch; }

/* 2026-11-06: AI systems, the engine, and the packages (home page only). */
:root { --glow: #8dceae; --panel-soft: #c8c6bf; --node: #1f2a24; }

.hero-x { position: relative; overflow: hidden; isolation: isolate; }
.hero.hero-x { padding-left: 24px; padding-right: 24px; }
.hero-x::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -160px;
  width: 620px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(28, 107, 74, 0.16), transparent 72%);
  pointer-events: none;
  z-index: -1;
}
.hero-x h1 { max-width: 16ch; }
.hero-x .hl { color: var(--green); font-style: italic; white-space: nowrap; }
.proof-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.proof-strip span {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 13.5px;
  font-weight: 500;
}
.proof-strip b { color: var(--green); font-weight: 600; }

.engine-panel {
  background: var(--panel);
  color: var(--panel-text);
  border-radius: 22px;
  padding: 22px 22px 14px;
  box-shadow: 0 30px 60px -30px rgba(20, 22, 19, 0.55);
}
.engine-panel .eyebrow { color: var(--glow); }
.engine-panel .rail { position: relative; margin-top: 10px; }
.engine-panel .rail::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: linear-gradient(var(--glow), rgba(141, 206, 174, 0.12));
}
.engine-panel ol { list-style: none; }
.engine-panel li { display: grid; grid-template-columns: 36px 1fr; gap: 14px; padding: 10px 0; align-items: start; }
.engine-panel .dot {
  position: relative;
  z-index: 1;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--node);
  border: 1px solid rgba(141, 206, 174, 0.45);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  color: var(--glow);
  font-size: 13px;
}
.engine-panel li strong { display: block; font-size: 16px; font-weight: 600; }
.engine-panel li em { display: block; margin-top: 2px; font-style: normal; color: var(--panel-soft); font-size: 13.5px; line-height: 1.4; }
.engine-panel .pulse {
  position: absolute;
  z-index: 2;
  left: 13px;
  top: 23px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 14px 4px rgba(141, 206, 174, 0.6);
  animation: fh-run 5s ease-in-out infinite;
}
@keyframes fh-run {
  0% { top: 23px; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { top: calc(100% - 33px); opacity: 0; }
}

.sys-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 32px; }
.sys {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 26px;
}
.sys .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green);
  display: grid;
  place-items: center;
}
.sys .tag {
  position: absolute;
  top: 26px;
  right: 26px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid #cfe5d8;
  border-radius: 999px;
  padding: 4px 10px;
}
.sys .tag.own { background: var(--ink); color: #fff; border-color: var(--ink); }
.sys h3 { font-family: var(--serif); font-weight: 560; font-size: 26px; letter-spacing: -0.03em; line-height: 1.1; margin: 16px 0 8px; }
.sys p { color: var(--muted); font-size: 15px; }
.sys ul { margin: 14px 0 0 18px; font-size: 14.5px; }
.sys li { margin: 6px 0; }
@media (max-width: 760px) {
  .sys-grid { grid-template-columns: 1fr; }
  .sys .tag { position: static; display: inline-block; margin: 0 0 0 10px; vertical-align: middle; }
  .sys .icon { display: inline-grid; vertical-align: middle; }
}

section.dark { background: var(--panel); color: var(--panel-text); }
.dark .eyebrow { color: var(--glow); }
.dark .sec-lede { color: var(--panel-soft); }
.flow { list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 40px; }
.flow li { position: relative; padding: 0 10px; text-align: center; }
.flow .node {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  border-radius: 18px;
  background: var(--node);
  border: 1px solid rgba(141, 206, 174, 0.4);
  color: var(--glow);
  display: grid;
  place-items: center;
  position: relative;
  z-index: 1;
}
.flow li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 31px;
  left: calc(50% + 40px);
  right: calc(-50% + 40px);
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--glow) 0 8px, transparent 8px 14px);
  background-size: 28px 2px;
  animation: fh-dash 1.4s linear infinite;
}
@keyframes fh-dash { to { background-position: 28px 0; } }
.flow strong { display: block; font-size: 16px; font-weight: 600; }
.flow em { display: block; margin-top: 4px; font-style: normal; font-size: 13.5px; color: var(--panel-soft); }
.loop {
  margin-top: 34px;
  border: 1px dashed rgba(141, 206, 174, 0.5);
  border-radius: 18px;
  padding: 18px 22px;
  display: flex;
  gap: 16px;
  align-items: center;
}
.loop svg { flex: none; color: var(--glow); }
.loop p { max-width: 70ch; }
@media (max-width: 860px) {
  .flow { grid-template-columns: 1fr; gap: 22px; }
  .flow li { display: grid; grid-template-columns: 64px 1fr; gap: 16px; align-items: center; text-align: left; padding: 0; }
  .flow .node { margin: 0; }
  .flow li:not(:last-child)::after {
    left: 31px;
    right: auto;
    top: 66px;
    width: 2px;
    height: 20px;
    background: repeating-linear-gradient(180deg, var(--glow) 0 5px, transparent 5px 9px);
    animation: none;
  }
}

.ba { display: grid; grid-template-columns: 1fr auto 1.15fr; gap: 18px; align-items: center; margin-top: 32px; }
.lead { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.lead.after { border-color: #9fd0b6; box-shadow: 0 24px 50px -28px rgba(28, 107, 74, 0.45); }
.lead h3 { font-size: 12.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.lead.after h3 { color: var(--green); }
.lead dl { display: grid; grid-template-columns: 92px 1fr; gap: 9px 12px; margin-top: 14px; font-size: 14.5px; }
.lead dt { color: var(--muted); }
.lead dd { font-weight: 500; }
.lead dd.miss { color: #a3a39b; font-style: italic; font-weight: 400; }
.lead dd.ok { color: var(--green); font-weight: 600; }
.lead .opener { margin-top: 16px; background: var(--green-soft); border-radius: 12px; padding: 12px 14px; font-size: 14.5px; }
.ba .arrow { display: grid; justify-items: center; gap: 4px; color: var(--green); font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
.sample-note { margin-top: 14px; font-size: 13px; color: var(--muted); }
@media (max-width: 860px) {
  .ba { grid-template-columns: 1fr; }
  .ba .arrow svg { transform: rotate(90deg); }
}

.pkgs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 32px; }
.pkg {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
}
.pkg .tag { font-size: 11.5px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); }
.pkg h3 { font-family: var(--serif); font-weight: 560; font-size: 24px; letter-spacing: -0.03em; line-height: 1.1; margin: 10px 0 4px; min-height: 2.2em; }
@media (max-width: 640px) { .pkg h3 { min-height: 0; } }
.pkg .price { font-family: var(--serif); font-size: 40px; font-weight: 640; letter-spacing: -0.03em; line-height: 1; margin: 12px 0 8px; }
.pkg .sub { color: var(--muted); font-size: 14.5px; }
.pkg ul { list-style: none; margin: 18px 0; font-size: 14.5px; }
.pkg li { position: relative; padding: 8px 0 8px 24px; border-top: 1px solid var(--line); }
.pkg li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 14px;
  width: 11px;
  height: 6px;
  border-left: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: rotate(-45deg);
}
.pkg .term { margin-top: auto; margin-bottom: 14px; font-size: 13.5px; font-weight: 600; color: var(--green); background: var(--green-soft); border-radius: 10px; padding: 9px 12px; }
.pkg .btn { text-align: center; }
.pkg.hot { background: var(--panel); color: var(--panel-text); border-color: var(--panel); box-shadow: 0 30px 60px -30px rgba(20, 22, 19, 0.6); }
.pkg.hot .tag { color: var(--glow); }
.pkg.hot .sub { color: var(--panel-soft); }
.pkg.hot li { border-color: rgba(255, 255, 255, 0.12); }
.pkg.hot li::before { border-color: var(--glow); }
.pkg.hot .term { color: var(--glow); background: rgba(141, 206, 174, 0.14); }
.pkg.hot .btn { background: var(--glow); border-color: var(--glow); color: var(--ink); }
.pkg.hot .btn:hover { background: #a6dcc0; }
.pkg.custom { background: linear-gradient(165deg, var(--card), var(--green-soft)); border: 1px dashed #9fd0b6; }
@media (max-width: 1040px) { .pkgs { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .pkgs { grid-template-columns: 1fr; } }

.compare-wrap { margin-top: 28px; overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 18px; }
table.compare { width: 100%; min-width: 660px; border-collapse: collapse; font-size: 14.5px; }
.compare th, .compare td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: center; }
.compare th:first-child, .compare td:first-child { text-align: left; }
.compare thead th { font-size: 13px; font-weight: 600; vertical-align: bottom; }
.compare thead th span { display: block; margin-top: 2px; font-family: var(--serif); font-size: 19px; font-weight: 640; }
.compare tbody tr:last-child td { border-bottom: 0; }
.compare .hotcol { background: rgba(28, 107, 74, 0.07); }
.compare .yes { display: inline-block; width: 12px; height: 7px; border-left: 2px solid var(--green); border-bottom: 2px solid var(--green); transform: rotate(-45deg); }
.compare .no { color: #a3a39b; font-size: 13px; }

.steps.four { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .steps.four { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .steps.four { grid-template-columns: 1fr; } }
#plain .band { margin-top: 16px; }

@media (prefers-reduced-motion: reduce) {
  .engine-panel .pulse { animation: none; opacity: 0; }
  .flow li:not(:last-child)::after { animation: none; }
}