/* Latent Suite — Blueprint design system */
:root, :root[data-theme="light"] {
  --bg: #F7F9FB;
  --grid: rgba(36, 86, 166, 0.08);
  --ink: #14263B;
  --sub: #5A6B80;
  --accent: #2456A6;
  --panel: #FFFFFF;
  --hi: rgba(36, 86, 166, 0.07);
  --line: rgba(20, 38, 59, 0.3);
  --line-soft: rgba(20, 38, 59, 0.14);
  --amber: #A87F35;
  --green: #3E7D5F;
  --red: #A5453C;
}
:root[data-theme="dark"] {
  --bg: #0E2A4A;
  --grid: rgba(255, 255, 255, 0.07);
  --ink: #EAF1F8;
  --sub: #9FB4CB;
  --accent: #7FB1E8;
  --panel: rgba(255, 255, 255, 0.04);
  --hi: rgba(127, 177, 232, 0.12);
  --line: rgba(234, 241, 248, 0.35);
  --line-soft: rgba(234, 241, 248, 0.16);
  --amber: #C29A52;
  --green: #6FA07C;
  --red: #C96B62;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Sora', 'Trebuchet MS', sans-serif;
  background: var(--bg);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  font-feature-settings: "tnum";
  transition: background-color .2s, color .2s;
}
.mono { font-family: 'IBM Plex Mono', monospace; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* type helpers */
.fig { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--accent); letter-spacing: 0.12em; }
.sub { color: var(--sub); }

/* buttons */
.btn {
  display: inline-block; padding: 14px 28px;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; font-weight: 600;
  letter-spacing: 0.02em; cursor: pointer; transition: opacity .15s;
}
.btn-solid { background: var(--accent); color: var(--bg); border: 1.5px solid var(--accent); }
.btn-solid:hover { opacity: .88; }
.btn-dash { border: 1.5px dashed var(--ink); color: var(--ink); background: transparent; }
.btn-dash:hover { background: var(--hi); }
.btn:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* header */
header { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 2px solid var(--ink); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 18px; height: 72px; }
.logo { display: flex; align-items: baseline; gap: 10px; }
.logo b { font-weight: 700; font-size: 20px; letter-spacing: 0.02em; }
.logo span { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--sub); }
.nav-links { display: flex; align-items: center; gap: 6px; font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; }
.nav-links > a { color: var(--sub); padding: 8px 12px; border: 1px solid transparent; transition: all .15s; }
.nav-links > a:hover { color: var(--ink); border-color: var(--line-soft); }
.nav-links > a.active { color: var(--ink); border-color: var(--line); }
.nav-links > a.nav-cta { padding: 10px 18px; background: var(--accent); color: var(--bg); font-weight: 600; margin-left: 8px; }
.nav-links > a.nav-cta:hover { opacity: .88; border-color: transparent; }
#themeToggle {
  margin-left: 6px; padding: 8px 12px; border: 1px solid var(--line-soft); background: transparent;
  color: var(--sub); font-family: 'IBM Plex Mono', monospace; font-size: 12px; cursor: pointer;
}
#themeToggle:hover { color: var(--ink); border-color: var(--line); }

/* sections */
section { padding: 88px 0; }
.sec-tag { display: block; margin-bottom: 18px; }
h1 { font-size: clamp(34px, 4.8vw, 56px); font-weight: 700; }
h2 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 700; }
h1 .acc, h2 .acc { color: var(--accent); }
.lead { font-size: 17.5px; color: var(--sub); max-width: 620px; margin-top: 22px; }

/* panels (spec sheets) */
.panel { border: 1.5px solid var(--ink); background: var(--panel); }
.panel-head {
  display: flex; justify-content: space-between; gap: 10px; padding: 13px 22px;
  border-bottom: 1.5px solid var(--ink);
  font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; color: var(--sub); letter-spacing: 0.06em;
}
.panel-head .acc { color: var(--accent); }
.panel-body { padding: 28px 24px; }
.panel-note {
  padding: 10px 22px; border-top: 1.5px dashed var(--line);
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--sub);
}

/* schematic rows */
.schem-row { display: flex; align-items: center; gap: 12px; padding: 12px 0; }
.schem-row + .schem-link { border-left: 1.5px dashed var(--accent); margin-left: 6.5px; height: 12px; }
.node { width: 14px; height: 14px; border: 1.5px solid var(--accent); flex-shrink: 0; }
.node.done { background: var(--accent); }
.node.dim { border-color: var(--sub); }
.schem-row .t { font-family: 'IBM Plex Mono', monospace; font-size: 13px; flex-grow: 1; }
.schem-row .d { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--sub); text-align: right; }
.schem-row.hi { background: var(--hi); padding: 12px 10px; margin: 0 -10px; }
.schem-row.hi .d { color: var(--accent); }

/* capability list */
.caps { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 40px; margin-top: 44px; }
.cap { border-top: 1.5px solid var(--ink); padding-top: 16px; }
.cap h3 { font-size: 17px; margin-bottom: 8px; }
.cap h3 .fig { margin-right: 10px; }
.cap p { font-size: 14.5px; color: var(--sub); }

/* persona cards */
.personas { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin-top: 40px; }
.persona { border: 1.5px solid var(--line); background: var(--panel); padding: 24px 22px; }
.persona h3 { font-size: 16px; margin-bottom: 8px; }
.persona .fig { display: block; margin-bottom: 12px; }
.persona p { font-size: 14px; color: var(--sub); }

/* callout strip */
.callout { border: 1.5px solid var(--ink); background: var(--panel); padding: 28px 34px; display: flex; gap: 26px; align-items: flex-start; }
.callout p { font-size: 18px; line-height: 1.6; font-weight: 500; }
.callout p .acc { color: var(--accent); }

/* pricing table */
.ptable { width: 100%; border-collapse: collapse; border: 1.5px solid var(--ink); background: var(--panel); }
.ptable th, .ptable td { padding: 18px 20px; text-align: left; border: 1px solid var(--line-soft); font-size: 15px; }
.ptable thead th { border-bottom: 1.5px solid var(--ink); font-size: 14px; }
.ptable thead th .fig { display: block; margin-bottom: 6px; }
.ptable td.mono { font-size: 13.5px; }
.ptable .bundle-col { background: var(--hi); }

/* forms */
form { display: grid; gap: 22px; max-width: 640px; }
label { display: block; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.08em; color: var(--sub); margin-bottom: 8px; }
input[type="text"], input[type="email"], textarea, select {
  width: 100%; padding: 13px 14px; border: 1.5px solid var(--line); background: var(--panel);
  color: var(--ink); font-family: 'Sora', sans-serif; font-size: 15px;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.radio-row { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-row label {
  display: flex; align-items: center; gap: 8px; margin: 0; padding: 11px 16px;
  border: 1.5px solid var(--line); cursor: pointer; font-size: 12.5px; color: var(--ink);
}
.radio-row input { accent-color: var(--accent); }

/* flow diagram */
.flow { display: flex; align-items: center; margin: 40px 0; }
.flow-node { border: 1.5px solid var(--ink); background: var(--panel); padding: 16px 22px; font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; font-weight: 600; text-align: center; }
.flow-node.hi { border-color: var(--accent); background: var(--hi); color: var(--accent); }
.flow-line { flex-grow: 1; border-top: 1.5px dashed var(--accent); min-width: 30px; }

/* footer */
footer { border-top: 2px solid var(--ink); padding: 44px 0 40px; margin-top: 40px; }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; color: var(--sub); }
.foot nav { display: flex; gap: 18px; flex-wrap: wrap; }
.foot a:hover { color: var(--ink); }

/* utilities */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.mt-lg { margin-top: 44px; }
.center { text-align: center; }

/* responsive */
@media (max-width: 960px) {
  .nav-links > a:not(.nav-cta) { display: none; }
  .nav-links > a.nav-cta { white-space: nowrap; padding: 9px 12px; font-size: 11px; }
  .caps, .grid-2 { grid-template-columns: 1fr; }
  .personas { grid-template-columns: 1fr; }
  .callout { flex-direction: column; gap: 12px; }
  section { padding: 60px 0; }
  .flow { flex-direction: column; align-items: stretch; gap: 0; }
  .flow-line { min-height: 22px; border-top: none; border-left: 1.5px dashed var(--accent); margin-left: 24px; }
  .ptable { display: block; overflow-x: auto; }
}
@media (max-width: 600px) { .wrap { padding: 0 20px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

/* brand logo (from latentdigitalsolutions.com) */
.logo .brand-svg { height: 30px; width: auto; display: block; color: var(--ink); transition: color .2s; }
.logo:hover .brand-svg { color: var(--accent); }