:root{
  --bg: #f5f3ec;
  --surface: #ffffff;
  --surface-2: #efece1;
  --ink: #0d2436;
  --ink-2: #4c5e63;
  --ink-3: #838f88;
  --line: rgba(13,36,54,0.13);
  --accent: #257f88;
  --accent-bright: #2f9aa1;
  --accent-ink: #ffffff;
  --amber: #a9702b;
  --amber-bg: rgba(169,112,43,0.1);
  --error: #c0392b;
  --shadow: 0 18px 40px -22px rgba(13,36,54,0.35);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg: #081722;
    --surface: #0e2531;
    --surface-2: #0a1c27;
    --ink: #edf2f1;
    --ink-2: #aebcbb;
    --ink-3: #75898b;
    --line: rgba(237,242,241,0.13);
    --accent: #4fc2c9;
    --accent-bright: #5fd0d6;
    --accent-ink: #04191f;
    --amber: #e2ab63;
    --amber-bg: rgba(226,171,99,0.14);
    --error: #ef6b5b;
    --shadow: 0 18px 44px -20px rgba(0,0,0,0.55);
  }
}
:root[data-theme="dark"]{
  --bg: #081722;
  --surface: #0e2531;
  --surface-2: #0a1c27;
  --ink: #edf2f1;
  --ink-2: #aebcbb;
  --ink-3: #75898b;
  --line: rgba(237,242,241,0.13);
  --accent: #4fc2c9;
  --accent-bright: #5fd0d6;
  --accent-ink: #04191f;
  --amber: #e2ab63;
  --amber-bg: rgba(226,171,99,0.14);
  --error: #ef6b5b;
  --shadow: 0 18px 44px -20px rgba(0,0,0,0.55);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
::selection{ background:var(--accent); color:var(--accent-ink); }

a{ color:inherit; }
h1,h2,h3{ font-family:"Fraunces", Georgia, serif; text-wrap:balance; margin:0; }
p{ margin:0; }

.mono{
  font-family:"IBM Plex Mono", ui-monospace, "SF Mono", monospace;
  letter-spacing:0.04em;
}
.eyebrow{
  font-family:"IBM Plex Mono", ui-monospace, monospace;
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--ink-3);
}

.shell{ max-width:920px; margin:0 auto; padding:0 28px; }
section{ padding:76px 0; border-bottom:1px solid var(--line); }
section:last-of-type{ border-bottom:none; }

/* ---------- top bar ---------- */
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding:22px 0 0;
}
.topbar .shell{ display:flex; align-items:center; justify-content:space-between; width:100%; }
.wordmark{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.wordmark img{ height:30px; width:auto; display:block; }
.wordmark .name{ font-family:"Fraunces", serif; font-weight:600; font-size:1.15rem; }
.wordmark .name .t2{ color:var(--accent); }
.topbar nav{ display:flex; gap:26px; }
.topbar nav a{
  font-family:"IBM Plex Mono", monospace; font-size:0.78rem; letter-spacing:0.06em;
  text-decoration:none; color:var(--ink-2); text-transform:uppercase;
}
.topbar nav a:hover{ color:var(--accent); }
.topbar nav a.active{ color:var(--accent); }

/* ---------- hero ---------- */
/* Real site photo (sunrise, drilling equipment on trestles, site silhouette
   on the horizon) as a full-bleed background. The gradient sits between the
   photo and every hero element below so text stays legible regardless of
   how bright a given part of the photo is, and regardless of light/dark
   mode — the hero intentionally always reads as a dark photo band, while
   the rest of the page keeps following the normal light/dark theme. */
.hero{
  padding-top:64px; padding-bottom:70px; border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(180deg, rgba(8,20,30,0.52) 0%, rgba(8,20,30,0.7) 55%, rgba(8,20,30,0.88) 100%),
    url("assets/hero-sunrise.jpg");
  background-size:cover;
  background-position:center 58%;
  background-repeat:no-repeat;
}
.hero-top{ display:flex; align-items:flex-start; justify-content:space-between; gap:24px; flex-wrap:wrap; margin-bottom:40px; }
.region-tags{ display:flex; gap:8px; flex-wrap:wrap; }
.hero .region-tag{
  font-family:"IBM Plex Mono", monospace; font-size:0.7rem; letter-spacing:0.05em;
  color:rgba(244,248,247,0.82); border:1px solid rgba(244,248,247,0.3); border-radius:999px;
  padding:4px 10px;
}
.hero .status-badge{
  display:inline-flex; align-items:center; gap:8px;
  background:rgba(226,171,99,0.16); color:#f0c990;
  border:1px solid rgba(226,171,99,0.4);
  border-radius:999px; padding:6px 14px 6px 10px;
  font-family:"IBM Plex Mono", monospace; font-size:0.74rem; letter-spacing:0.05em;
  white-space:nowrap;
}
.hero .status-badge .dot{ width:7px; height:7px; border-radius:50%; background:#f0c990; }

.hero-main{ display:grid; grid-template-columns:auto 1fr; gap:34px; align-items:center; }
.hero-mark{
  width:118px; height:auto; flex-shrink:0;
  border-radius:16px; box-shadow:0 14px 30px -12px rgba(0,0,0,0.5);
}
h1.hero-title{
  font-size:clamp(2.5rem, 5.6vw, 3.6rem);
  line-height:1.04;
  letter-spacing:-0.01em;
  color:#f4f8f7;
}
h1.hero-title .t2{ color:var(--accent-bright); }
.hero-tagline{
  margin-top:16px; font-size:1.18rem; color:rgba(244,248,247,0.88); max-width:34em;
  font-family:"Fraunces", serif; font-weight:400; font-style:italic;
}
.hero-lede{
  margin-top:22px; font-size:1.02rem; color:rgba(244,248,247,0.78); max-width:52em;
}
.hero-actions{ margin-top:30px; display:flex; gap:14px; flex-wrap:wrap; align-items:center; }
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 22px; border-radius:8px; font-weight:600; font-size:0.92rem;
  text-decoration:none; border:1px solid transparent; cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  font-family:"IBM Plex Sans", sans-serif;
}
.btn-primary{ background:var(--accent); color:var(--accent-ink); box-shadow:var(--shadow); }
.btn-primary:hover{ transform:translateY(-2px); }
.btn-ghost{ border-color:var(--line); color:var(--ink); }
.btn-ghost:hover{ border-color:var(--accent); color:var(--accent); }
.hero .btn-ghost{ border-color:rgba(244,248,247,0.4); color:#f4f8f7; }
.hero .btn-ghost:hover{ border-color:var(--accent-bright); color:var(--accent-bright); }

/* ---------- problem stats ---------- */
.stat-row{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden;
  margin-top:36px;
}
.stat{ background:var(--surface); padding:22px 20px; }
.stat .v{ font-family:"Fraunces", serif; font-weight:600; font-size:1.9rem; }
.stat .v .unit{ font-size:1.1rem; color:var(--ink-3); font-weight:400; }
.stat .l{ margin-top:6px; font-size:0.82rem; color:var(--ink-3); max-width:20em; }

.section-title{ font-size:clamp(1.6rem,3.4vw,2.1rem); margin-bottom:14px; }
.section-intro{ color:var(--ink-2); max-width:56em; font-size:1rem; margin-bottom:8px; }

/* ---------- strata (how it correlates) ---------- */
.strata{ margin-top:44px; display:flex; flex-direction:column-reverse; gap:2px; }
.layer{
  display:grid; grid-template-columns:34px auto 1fr; gap:18px; align-items:start;
  padding:22px 22px; border-radius:10px; position:relative;
}
.layer .idx{
  font-family:"IBM Plex Mono", monospace; font-size:0.78rem; color:var(--ink-3);
  padding-top:3px;
}
.layer .lname{ font-family:"Fraunces", serif; font-weight:600; font-size:1.06rem; white-space:nowrap; }
.layer .ldesc{ color:var(--ink-2); font-size:0.94rem; max-width:44em; }
.layer-1{ background: color-mix(in srgb, var(--ink) 88%, var(--accent) 12%); }
.layer-2{ background: color-mix(in srgb, var(--ink) 68%, var(--accent) 32%); }
.layer-3{ background: color-mix(in srgb, var(--ink) 42%, var(--accent) 58%); }
.layer-4{ background: color-mix(in srgb, var(--ink) 18%, var(--accent) 82%); }
.layer-1 .lname, .layer-1 .ldesc, .layer-1 .idx,
.layer-2 .lname, .layer-2 .ldesc, .layer-2 .idx,
.layer-3 .lname, .layer-3 .ldesc, .layer-3 .idx,
.layer-4 .lname, .layer-4 .ldesc, .layer-4 .idx{ color:#f4f8f7; }
.layer-1 .ldesc{ color:rgba(244,248,247,0.72); }
.layer-2 .ldesc{ color:rgba(244,248,247,0.78); }
.layer-3 .ldesc{ color:rgba(255,255,255,0.85); }
.layer-4 .ldesc{ color:rgba(4,20,25,0.75); }
.layer-4 .lname, .layer-4 .idx{ color:#04191f; }
.strata-cap{
  margin-top:14px; font-size:0.82rem; color:var(--ink-3); max-width:48em;
}
.strata-foot{
  margin-top:2px; display:flex; align-items:center; gap:10px;
  padding:14px 22px; border:1px dashed var(--line); border-radius:10px;
  font-family:"IBM Plex Mono", monospace; font-size:0.76rem; color:var(--ink-3);
}

/* ---------- proof / prototype ---------- */
.proof-grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:40px; align-items:start; margin-top:8px; }
.proof-grid p + p{ margin-top:14px; }
.proof-grid p{ color:var(--ink-2); }
.proof-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.proof-list li{
  border-left:2px solid var(--accent); padding:2px 0 2px 16px; font-size:0.92rem; color:var(--ink-2);
}
.proof-list b{ color:var(--ink); font-family:"Fraunces", serif; font-weight:600; }

/* ---------- founder ---------- */
.founder{ display:grid; grid-template-columns:200px 1fr; gap:40px; align-items:start; }
.founder-card{
  background:var(--surface); border:1px solid var(--line); border-radius:12px; padding:22px;
}
.founder-card .initials{
  width:52px; height:52px; border-radius:50%; background:var(--accent); color:var(--accent-ink);
  display:flex; align-items:center; justify-content:center; font-family:"Fraunces",serif; font-weight:600; font-size:1.2rem;
  margin-bottom:14px;
}
.founder-card .fname{ font-family:"Fraunces", serif; font-weight:600; font-size:1.05rem; }
.founder-card .frole{ font-size:0.82rem; color:var(--ink-3); margin-top:2px; }
.founder-ventures{ margin-top:14px; display:flex; flex-direction:column; gap:4px; }
.founder-ventures span{ font-size:0.78rem; color:var(--ink-3); font-family:"IBM Plex Mono",monospace; }
.founder-bio p{ color:var(--ink-2); }
.founder-bio p + p{ margin-top:14px; }

/* ---------- contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1.3fr; gap:48px; margin-top:36px; align-items:start; }
.contact-copy p{ color:var(--ink-2); }
.contact-email{
  display:inline-block; margin-top:20px;
  font-family:"Fraunces", serif; font-weight:600; font-size:1.2rem;
  text-decoration:none; color:var(--accent); border-bottom:1px solid currentColor;
  padding-bottom:2px;
}
.contact-form{ display:flex; flex-direction:column; gap:6px; }
.contact-form label{
  font-family:"IBM Plex Mono", monospace; font-size:0.72rem; letter-spacing:0.08em;
  text-transform:uppercase; color:var(--ink-3); margin-top:12px;
}
.contact-form input,
.contact-form textarea{
  padding:12px 14px; border-radius:8px; border:1px solid var(--line);
  font-family:"IBM Plex Sans", sans-serif; font-size:0.95rem;
  background:var(--surface); color:var(--ink);
}
.contact-form input:focus,
.contact-form textarea:focus{ outline:none; border-color:var(--accent); }
.contact-form button{ margin-top:18px; align-self:flex-start; }
.form-status{ font-size:0.85rem; margin-top:10px; min-height:1.2em; color:var(--ink-3); }
.form-status.success{ color:var(--accent); }
.form-status.error{ color:var(--error); }

footer{ padding:34px 0 46px; }
.footer-row{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  font-size:0.78rem; color:var(--ink-3);
}
.footer-note{ margin-top:10px; font-size:0.76rem; color:var(--ink-3); max-width:60em; }

/* ---------- home page teaser cards ---------- */
.info-grid{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  gap:20px; margin-top:36px;
}
.info-card{
  background:var(--surface); border:1px solid var(--line); border-radius:12px;
  padding:24px; display:flex; flex-direction:column; gap:10px;
}
.info-card h3{ font-family:"Fraunces", serif; font-weight:600; font-size:1.1rem; }
.info-card p{ color:var(--ink-2); font-size:0.92rem; }

.link-more{
  display:inline-flex; align-items:center; gap:6px; align-self:flex-start;
  margin-top:4px; font-family:"IBM Plex Mono", monospace; font-size:0.8rem; letter-spacing:0.04em;
  text-decoration:none; color:var(--accent); border-bottom:1px solid currentColor; padding-bottom:2px;
}
.link-more:hover{ color:var(--accent-bright); }

/* ---------- sub-page "next" link row ---------- */
.next-row{
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:16px;
  padding:28px 0 48px; border-top:1px solid var(--line);
}
.next-label{
  font-family:"IBM Plex Mono", monospace; font-size:0.72rem; letter-spacing:0.1em;
  text-transform:uppercase; color:var(--ink-3);
}

@media (max-width:680px){
  .hero-main{ grid-template-columns:1fr; }
  .hero-mark{ width:84px; }
  .stat-row{ grid-template-columns:1fr; }
  .founder{ grid-template-columns:1fr; }
  .layer{ grid-template-columns:24px 1fr; }
  .layer .lname{ grid-column:2; }
  .layer .ldesc{ grid-column:2; }
  .contact-grid{ grid-template-columns:1fr; }
  .proof-grid{ grid-template-columns:1fr; }
}