/* Epinodal — continuous-learning enterprise AI. Identity stylesheet. */

:root {
  --ink:       #0C1620;
  --ink-2:     #122231;   /* raised surface */
  --ink-3:     #1B3144;   /* hairline / border on ink */
  --porcelain: #ECEFEF;
  --porcelain-dim: #AEBAC2;
  --retain:    #F0A830;   /* signature: consolidated memory */
  --retain-deep: #C9842A;
  --decay:     #5A6670;   /* the forgetting line */
  --live:      #3BB7A9;   /* learning-now pulse, sparingly */

  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 64px);

  --display: "Archivo", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--porcelain);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }

/* ---- type ---- */
h1, h2, h3 {
  font-family: var(--display);
  font-stretch: 125%;            /* expanded width axis */
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: 0;
}
h1 { font-size: clamp(2.6rem, 7vw, 5.4rem); font-weight: 900; }
h2 { font-size: clamp(1.9rem, 4.2vw, 3.2rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); font-stretch: 112%; font-weight: 700; }

p { margin: 0 0 1rem; max-width: 64ch; }
a { color: inherit; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--retain);
  margin: 0 0 1.4rem;
  display: inline-flex; align-items: center; gap: 0.6em;
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--retain); opacity: 0.7;
}
.lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--porcelain); }
.mono { font-family: var(--mono); }
.dim { color: var(--porcelain-dim); }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55em;
  font-family: var(--mono); font-size: 0.85rem; font-weight: 500;
  letter-spacing: 0.04em; text-decoration: none;
  padding: 0.85em 1.4em; border-radius: 2px;
  transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn-primary { background: var(--retain); color: var(--ink); font-weight: 600; }
.btn-primary:hover { background: #ffc25e; transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--ink-3); color: var(--porcelain); }
.btn-ghost:hover { border-color: var(--retain); color: var(--retain); }
.btn .arrow { transition: transform .15s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--ink) 82%, transparent);
  border-bottom: 1px solid var(--ink-3);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand {
  font-family: var(--display); font-stretch: 125%; font-weight: 900;
  font-size: 1.15rem; letter-spacing: -0.01em; text-decoration: none; color: var(--porcelain);
}
.brand span { color: var(--retain); }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 30px); }
.nav-links a { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.03em; text-decoration: none; color: var(--porcelain-dim); }
.nav-links a:hover { color: var(--porcelain); }
.nav-links a.btn { color: var(--ink); }
.nav-links a.btn:hover { color: var(--ink); }

/* ---- hero ---- */
.hero { padding: clamp(48px, 9vh, 110px) 0 clamp(40px, 7vh, 80px); }
.hero h1 { max-width: 16ch; }
.hero h1 .em { color: var(--retain); }
.hero .lead { margin-top: 1.6rem; max-width: 52ch; color: var(--porcelain-dim); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 2.2rem; }

/* ---- retention curve (signature) ---- */
.curve-card {
  margin-top: clamp(40px, 6vh, 72px);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  border: 1px solid var(--ink-3);
  border-radius: 6px;
  padding: clamp(20px, 3vw, 34px);
}
.curve-head { display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
.curve-head .ttl { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--porcelain-dim); }
.day-counter { font-family: var(--mono); font-size: 0.82rem; color: var(--live); }
.day-counter b { color: var(--porcelain); font-weight: 600; }
.curve-svg { width: 100%; height: auto; display: block; }
.legend { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 16px; font-family: var(--mono); font-size: 0.78rem; }
.legend span { display: inline-flex; align-items: center; gap: 8px; color: var(--porcelain-dim); }
.legend .dot { width: 10px; height: 10px; border-radius: 50%; }
.legend .pct { color: var(--porcelain); font-weight: 600; }

/* animated draw */
.path-retain, .path-decay { fill: none; stroke-width: 3; stroke-linecap: round; }
.path-retain { stroke: var(--retain); }
.path-decay { stroke: var(--decay); stroke-dasharray: 2 9; stroke-width: 2.5; }
.path-draw { stroke-dasharray: var(--len); stroke-dashoffset: var(--len); animation: draw 1.6s 0.2s ease forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) { .path-draw { animation: none; stroke-dashoffset: 0; } }

/* ---- generic section ---- */
section { padding: clamp(56px, 11vh, 130px) 0; border-top: 1px solid var(--ink-3); }
.sec-head { max-width: 60ch; margin-bottom: clamp(28px, 5vh, 56px); }
.sec-head h2 { margin-bottom: 1rem; }
.sec-head .eyebrow { color: var(--porcelain-dim); }
.sec-head .eyebrow::before { background: var(--porcelain-dim); }

/* problem — pull quote */
.pull { font-family: var(--display); font-stretch: 112%; font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem); line-height: 1.12; max-width: 22ch; letter-spacing: -0.01em; }
.pull em { color: var(--retain); font-style: normal; }

/* the loop — cyclical steps */
.loop { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1px; background: var(--ink-3); border: 1px solid var(--ink-3); border-radius: 6px; overflow: hidden; }
.loop .step { background: var(--ink); padding: 26px 22px; position: relative; }
.loop .step .k { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--retain); }
.loop .step h3 { margin: 12px 0 6px; font-stretch: 100%; font-size: 1.1rem; }
.loop .step p { font-size: 0.92rem; color: var(--porcelain-dim); margin: 0; }
.loop .step.tomorrow { background: linear-gradient(180deg, color-mix(in srgb, var(--retain) 12%, var(--ink)), var(--ink)); }
.loop-note { font-family: var(--mono); font-size: 0.85rem; color: var(--live); margin-top: 18px; }

/* proof — stat blocks */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.stat { border: 1px solid var(--ink-3); border-radius: 6px; padding: 28px 24px; background: var(--ink-2); }
.stat .big { font-family: var(--display); font-stretch: 125%; font-weight: 900; font-size: clamp(2.4rem, 5vw, 3.4rem); line-height: 1; color: var(--retain); }
.stat .big small { font-size: 0.4em; color: var(--porcelain-dim); font-weight: 600; }
.stat .vs { font-family: var(--mono); font-size: 0.85rem; color: var(--decay); margin: 10px 0 4px; }
.stat h3 { font-stretch: 100%; font-size: 1.05rem; margin: 14px 0 6px; }
.stat p { font-size: 0.9rem; color: var(--porcelain-dim); margin: 0; }
.proof-caveat { font-family: var(--mono); font-size: 0.78rem; color: var(--decay); margin-top: 26px; max-width: 70ch; }

/* sovereign — node cluster */
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(28px, 5vw, 60px); align-items: center; }
.feats { list-style: none; padding: 0; margin: 1.4rem 0 0; }
.feats li { padding: 14px 0; border-top: 1px solid var(--ink-3); display: flex; gap: 14px; }
.feats li::before { content: "▸"; color: var(--retain); }
.feats b { font-weight: 600; }
.feats span { color: var(--porcelain-dim); }
.nodes { aspect-ratio: 1; border: 1px solid var(--ink-3); border-radius: 6px; background:
  radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--ink-2) 90%, var(--retain)) 0%, var(--ink) 70%);
  display: grid; place-items: center; }
.nodes svg { width: 86%; height: 86%; }

/* contact */
.contact { text-align: center; }
.contact h2 { margin-bottom: 1.2rem; }
.mails { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 1.8rem; }
.mail {
  font-family: var(--mono); font-size: 0.95rem; text-decoration: none;
  border: 1px solid var(--ink-3); border-radius: 2px; padding: 0.8em 1.3em; color: var(--porcelain);
}
.mail:hover { border-color: var(--retain); color: var(--retain); }
.mail b { color: var(--retain); font-weight: 500; }

/* investor specifics */
.ask { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1px; background: var(--ink-3); border: 1px solid var(--ink-3); border-radius: 6px; overflow: hidden; }
.ask .item { background: var(--ink); padding: 24px 22px; }
.ask .item .amt { font-family: var(--display); font-stretch: 125%; font-weight: 900; font-size: 1.7rem; color: var(--retain); }
.ask .item .amt.small { color: var(--porcelain); }
.ask .item p { font-size: 0.88rem; color: var(--porcelain-dim); margin: 8px 0 0; }
.team { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; }
.member { border: 1px solid var(--ink-3); border-radius: 6px; padding: 26px 24px; background: var(--ink-2); display: flex; gap: 18px; align-items: flex-start; }
.avatar { width: 92px; height: 92px; border-radius: 50%; flex: none; object-fit: cover; object-position: center; background: var(--ink-3);
  display: grid; place-items: center; font-family: var(--mono); font-weight: 600; color: var(--retain); border: 1px solid var(--ink-3); }
.member h3 { font-stretch: 100%; font-size: 1.1rem; }
.member .role { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--retain); margin: 4px 0 10px; }
.member p { font-size: 0.9rem; color: var(--porcelain-dim); margin: 0; }

/* footer */
footer { border-top: 1px solid var(--ink-3); padding: 40px 0; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
footer, footer a { font-family: var(--mono); font-size: 0.78rem; color: var(--decay); text-decoration: none; }
footer a:hover { color: var(--porcelain-dim); }

/* tagline triad */
.tagline { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 1.5rem 0 0; padding: 0;
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--porcelain-dim); }
.tagline span { display: inline-flex; align-items: center; gap: 22px; }
.tagline span + span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--retain); flex: none; }
.tagline span:first-child { flex-basis: 100%; }          /* line 1: neuroscience alone */
.tagline span:nth-child(2)::before { content: none; }    /* no dot at start of line 2 */

/* manifesto band */
.manifesto-txt { font-family: var(--display); font-stretch: 112%; font-weight: 700;
  font-size: clamp(1.6rem, 3.7vw, 2.8rem); line-height: 1.12; letter-spacing: -0.012em; max-width: 26ch; margin: 0; }
.manifesto-txt em { color: var(--retain); font-style: normal; }
.manifesto-txt .sub { display: block; margin-top: 1rem; font-family: var(--body); font-stretch: normal;
  font-weight: 400; font-size: clamp(1rem, 1.5vw, 1.2rem); line-height: 1.5; color: var(--porcelain-dim); max-width: 56ch; }

/* focus + a11y */
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--live); outline-offset: 3px; border-radius: 2px; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
}