/* Entagraph — public site.

   The palette is the application's own: the logo's ink and node sage, on the
   bone the splash screen already uses. Type is Newsreader over Archivo, with a
   little IBM Plex Mono for labels and identifiers.

   One stylesheet, mobile-first, no framework. */

:root {
  --bone:   #EDEEE9;
  --bone-2: #E4E6DF;
  --ink:    #1B1D1A;
  --ink-2:  #55574F;
  --ink-3:  #7C7E74;
  --sage:   #4A5A4E;
  --rule:      rgba(27, 29, 26, 0.13);
  --rule-soft: rgba(27, 29, 26, 0.07);
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --gut: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 400; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
img { max-width: 100%; height: auto; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--sage); }
hr { height: 1px; background: var(--rule); border: 0; margin: 0; }
::selection { background: var(--sage); color: var(--bone); }
:focus-visible { outline: 2px solid var(--sage); outline-offset: 3px; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 var(--gut); }
.vh, .skip {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip:focus {
  position: fixed; top: 12px; left: 12px; width: auto; height: auto; clip: auto;
  background: var(--ink); color: var(--bone); padding: 10px 16px; z-index: 60;
}

/* ---------- type ---------- */
.d1 { font-family: var(--serif); font-size: clamp(38px, 8.4vw, 74px); line-height: 1.05; letter-spacing: -0.022em; text-wrap: balance; }
.d2 { font-family: var(--serif); font-size: clamp(28px, 5vw, 46px); line-height: 1.12; letter-spacing: -0.016em; text-wrap: balance; }
.d2.sm { font-size: clamp(26px, 4vw, 38px); }
.d3 { font-family: var(--serif); font-size: clamp(21px, 3vw, 27px); line-height: 1.28; letter-spacing: -0.01em; margin-bottom: .6em; }
.label {
  font-family: var(--sans); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--ink-3);
  margin: 0 0 1em;
}
.lead   { font-size: clamp(17px, 2.2vw, 19px); color: var(--ink-2); max-width: 32em; text-wrap: pretty; }
.lead-s { color: var(--ink-2); max-width: 36em; }
.fine   { font-size: 13px; line-height: 1.55; color: var(--ink-3); }
p, li { color: var(--ink-2); }
h1, h2, h3, strong { color: var(--ink); }
strong { font-weight: 500; }

section { padding: 56px 0; }
section.tint { background: var(--bone-2); border-block: 1px solid var(--rule); }
.hero { padding: 48px 0 44px; }

/* ---------- header ---------- */
.bar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(237, 238, 233, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.bar-in { display: flex; align-items: center; justify-content: space-between; min-height: 64px; flex-wrap: wrap; }
.brand img { height: 23px; width: auto; display: block; }
.navtoggle {
  width: 44px; height: 44px; margin-right: -10px; background: none; border: 0;
  cursor: pointer; color: var(--ink); display: flex; align-items: center; justify-content: center;
}
.nav { display: none; width: 100%; flex-direction: column; padding-bottom: 14px; }
.nav.open { display: flex; }
.nav a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--rule-soft); color: var(--ink-2); }
.nav .sep { display: none; }
.nav .signin { border-bottom: 0; }
.signin { display: inline-flex; align-items: center; gap: 7px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 24px;
  background: var(--ink); color: var(--bone); border: 1px solid var(--ink);
  font-family: var(--sans); font-size: 15px; font-weight: 500; border-radius: 2px;
  cursor: pointer; transition: background .18s, border-color .18s;
}
.btn:hover { background: var(--sage); border-color: var(--sage); color: var(--bone); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.ghost { background: none; color: var(--ink); border-color: var(--rule); }
.btn.ghost:hover { border-color: var(--ink); background: none; color: var(--ink); }
.btn.light { background: var(--bone); color: var(--ink); border-color: var(--bone); }
.btn.light:hover { background: #fff; border-color: #fff; color: var(--ink); }
.btn-sm { min-height: 42px; padding: 0 18px; font-size: 14px; }
.cta { display: flex; flex-direction: column; gap: 11px; margin-top: 28px; }
.cta .btn { width: 100%; }

/* ---------- layout ---------- */
.grid { display: grid; gap: 28px; }
.head { margin-bottom: 32px; }
.mid { align-items: center; }
.two, .who, .cards, .three { display: grid; gap: 24px; }
.sub { font-size: 15px; color: var(--ink-3); margin-top: 14px; max-width: 32em; }
.assure {
  display: flex; gap: 10px; align-items: flex-start; margin-top: 28px;
  padding-top: 22px; border-top: 1px solid var(--rule-soft);
  font-size: 13.5px; color: var(--ink-3);
}
.assure svg { flex-shrink: 0; margin-top: 3px; }

/* ---------- screenshots ---------- */
.shot { margin: 28px 0 0; }
.shot img { display: block; border: 1px solid var(--rule); border-radius: 2px; }
.shot figcaption { margin-top: 11px; font-size: 13px; line-height: 1.5; color: var(--ink-3); max-width: 60em; }
.shot.bare img { border-radius: 2px; }
.shot.wide { margin-top: 36px; }
.hero-shot { margin-top: 40px; }

/* ---------- the five questions ---------- */
.panel { border: 1px solid var(--rule); border-radius: 2px; background: rgba(255,255,255,.42); }
.tabs {
  display: flex; gap: 24px; padding: 18px var(--gut) 0;
  overflow-x: auto; border-bottom: 1px solid var(--rule);
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs button {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 0 0 13px; cursor: pointer; white-space: nowrap;
  font-family: var(--sans); font-size: 14.5px; font-weight: 500; color: var(--ink-3);
  transition: color .16s, border-color .16s;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--ink); }
.pane { display: grid; gap: 24px; padding: 28px var(--gut) 32px; }
/* An explicit display beats the [hidden] default, so restore it. */
.pane[hidden] { display: none; }
.tag { font-family: var(--mono); font-size: 11px; color: var(--sage); letter-spacing: .06em; margin-bottom: 10px; }
.pane h3 { font-family: var(--serif); font-size: 23px; line-height: 1.3; margin-bottom: .5em; }
.pane-l p { font-size: 15px; }
.pane-r { list-style: none; margin: 0; padding: 0; counter-reset: n; display: grid; gap: 12px; }
.pane-r li { counter-increment: n; position: relative; padding-left: 34px; font-size: 15px; color: var(--ink); }
.pane-r li::before {
  content: counter(n, decimal-leading-zero); position: absolute; left: 0; top: 1px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
}

/* ---------- chips, packs, lists ---------- */
.chips { list-style: none; margin: 18px 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.chips li {
  font-family: var(--mono); font-size: 12px; color: var(--ink-2);
  border: 1px solid var(--rule); border-radius: 2px; padding: 4px 8px;
}
.packs { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.packs li { background: var(--bone-2); padding: 18px; font-size: 15px; color: var(--ink); font-weight: 500; }
.packs span { display: block; font-family: var(--mono); font-size: 11px; color: var(--sage); font-weight: 400; margin-bottom: 8px; }
.three { list-style: none; margin: 32px 0 0; padding: 0; padding-top: 26px; border-top: 1px solid var(--rule); }
.three li { font-size: 14px; }
.three span { display: block; font-family: var(--mono); font-size: 11px; color: var(--sage); margin-bottom: 8px; }
.surfaces { margin-top: 48px; }
.rulel > *:first-child { margin-top: 0; }
.handoff { margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--rule); }

/* The one line that states the promise. Set apart, not shouted. */
.pull {
  margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--rule);
  font-family: var(--serif); font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.4; color: var(--ink); max-width: 24em;
}
/* The stated/inferred distinction is the trust claim; give it a frame. */
.stated {
  margin-top: 22px; padding: 16px 18px;
  border-left: 2px solid var(--sage); background: rgba(74, 90, 78, .07);
  border-radius: 0 2px 2px 0;
}
.stated p { font-size: 14.5px; margin: 0; }
.mono {
  font-family: var(--mono); font-size: 12px; color: var(--sage);
  border: 1px solid rgba(74, 90, 78, .4); border-radius: 2px; padding: 1px 5px;
  white-space: nowrap;
}
.ai-modes { margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--rule); }
.handoff h3 { font-size: 18px; font-weight: 500; margin-bottom: .5em; }
.handoff p { font-size: 15px; }

/* ---------- cards ---------- */
.cards { border: 1px solid var(--rule); border-radius: 2px; background: var(--rule); gap: 1px; }
.cards > div { background: var(--bone); padding: 28px 24px 30px; }
.cards svg { margin-bottom: 16px; display: block; }
.cards h3 { font-size: 18px; font-weight: 500; margin-bottom: .55em; }
.cards p { font-size: 15px; }
.ai { margin-top: 48px; }
.modes { margin: 24px 0 0; display: grid; gap: 14px; }
.modes > div { display: grid; grid-template-columns: 74px 1fr; gap: 16px; align-items: baseline; }
.modes dt { font-family: var(--mono); font-size: 11px; color: var(--sage); }
.modes dd { margin: 0; font-size: 15px; color: var(--ink); }
.who { border: 1px solid var(--rule); background: var(--rule); gap: 1px; }
.who > div { background: var(--bone); padding: 24px 22px 26px; }
.who h3 { font-size: 17px; font-weight: 500; margin-bottom: .5em; }
.who p { font-size: 15px; }

/* ---------- dark: access + footer ---------- */
.dark { background: var(--ink); color: var(--bone); }
.dark h1, .dark h2, .dark h3, .dark strong { color: var(--bone); }
.dark p, .dark li { color: rgba(237,238,233,.72); }
.dark .label { color: rgba(237,238,233,.55); }
.dark .fine { color: rgba(237,238,233,.5); }
.dark a { color: var(--bone); }
.dark a:hover { color: #fff; }
.access { padding-block: 8px; }
.already { margin-top: 32px; padding-top: 24px; border-top: 1px solid rgba(237,238,233,.16); }
.ul { display: inline-flex; align-items: center; gap: 9px; border-bottom: 1px solid rgba(237,238,233,.35); padding-bottom: 3px; }

form .pair { display: grid; gap: 16px; }
form p { margin: 0 0 16px; }
label.label { display: block; margin-bottom: 8px; }
input, textarea {
  width: 100%; min-height: 50px; padding: 13px 14px;
  background: transparent; border: 1px solid rgba(237,238,233,.24); border-radius: 2px;
  color: var(--bone); font-family: var(--sans); font-size: 16px; line-height: 1.5;
  outline: none; transition: border-color .18s;
}
input:focus, textarea:focus { border-color: rgba(237,238,233,.6); }
textarea { resize: vertical; }
.hp { position: absolute; left: -9999px; }
.submit { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; margin-top: 6px; }
.submit .btn { width: 100%; }
.formmsg { margin-top: 16px; font-size: 14.5px; min-height: 1.5em; }
.formmsg.ok  { color: var(--bone); }
.formmsg.bad { color: #E8A79B; }

.foot { padding: 30px 0 34px; border-top: 1px solid rgba(237,238,233,.14); }
.foot-in { display: grid; gap: 20px; }
.foot img { height: 20px; width: auto; opacity: .85; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.foot-nav a { font-size: 14px; color: rgba(237,238,233,.6); }

/* ---------- wider ---------- */
@media (min-width: 700px) {
  :root { --gut: 40px; }
  .two, .who, .cards, .three, .pair, .packs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta { flex-direction: row; }
  .cta .btn { width: auto; }
  .submit { flex-direction: row; align-items: center; gap: 22px; }
  .submit .btn { width: auto; }
  .pane { grid-template-columns: 5fr 7fr; padding: 34px var(--gut) 38px; }
  .pane-r { padding-left: 28px; border-left: 1px solid var(--rule); }
  .foot-in { grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; }
  .foot-nav { justify-content: center; }
}

@media (min-width: 960px) {
  :root { --gut: 64px; }
  section { padding: 88px 0; }
  .hero { padding: 104px 0 92px; }
  .grid { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 32px; align-items: start; }
  .col-3 { grid-column: span 3; } .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; } .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .cards, .three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .packs { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .rulel { padding-left: 32px; border-left: 1px solid var(--rule); }
  .navtoggle { display: none; }
  .nav {
    display: flex; flex-direction: row; align-items: center; gap: 30px;
    width: auto; padding-bottom: 0;
  }
  .nav a:not(.btn) { padding: 0; border-bottom: 0; font-size: 15px; }
  .nav .sep { display: block; width: 1px; height: 20px; background: var(--rule); }
  .bar-in { min-height: 82px; flex-wrap: nowrap; }
  .brand img { height: 27px; }
  .heroText { max-width: 62%; }
  .hero-shot { margin-top: 56px; }
}

@media print {
  .bar, .cta, form, .navtoggle { display: none; }
  body { background: #fff; }
}