/* DND Technologies — site styles
   Layout: white masthead for the logo, deep-navy hero with drawn circuit traces,
   light "paper" content bands alternating with navy bands, spec-sheet details in mono. */
:root {
  --navy-950: #071427;
  --navy-900: #0b1e3a;
  --navy-700: #14396b;
  --blue: #1d68d6;
  --blue-bright: #4b95ff;
  --silver: #c3cdda;
  --ink: #0e1a2c;
  --muted: #56667d;
  --line: #dbe2ec;
  --paper: #f3f6fa;
  --white: #ffffff;
  --on-navy: #e7eef8;
  --on-navy-muted: #9fb2cc;

  --f-display: "Saira", "Arial Narrow", Arial, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 4px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
a:hover { color: var(--navy-700); }
:focus-visible { outline: 2px solid var(--blue-bright); outline-offset: 3px; }

h1, h2, h3, h4 { font-family: var(--f-display); color: var(--navy-900); line-height: 1.12; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.9rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.45rem); font-weight: 700; }
h3 { font-size: 1.3rem; font-weight: 600; }
p { margin: 0; max-width: 66ch; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.stack { display: grid; gap: 1.1rem; }
.stack-lg { display: grid; gap: 2.4rem; }

/* Eyebrow echoes the logo's tracked tagline with rules */
.eyebrow {
  display: inline-flex; align-items: center; gap: .8rem;
  font-family: var(--f-display); font-weight: 600; font-size: .78rem;
  letter-spacing: .32em; text-transform: uppercase; color: var(--blue);
}
.eyebrow::before { content: ""; width: 2.2rem; height: 2px; background: currentColor; }
.lede { font-size: 1.16rem; color: var(--muted); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: var(--white); border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .7rem; }
.brand img { height: 74px; width: auto; }
.nav { display: flex; align-items: center; gap: .2rem; }
.nav a {
  font-family: var(--f-display); font-weight: 600; font-size: .8rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--navy-900); text-decoration: none;
  padding: .55rem .7rem; border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--blue); }
.nav a[aria-current="page"] { color: var(--blue); border-bottom-color: var(--blue); }
.nav .nav-cta { background: var(--navy-900); color: var(--white); border-radius: var(--radius); margin-left: .5rem; border-bottom: 0; }
.nav .nav-cta:hover, .nav .nav-cta[aria-current="page"] { background: var(--blue); color: var(--white); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: var(--radius);
  padding: .5rem .7rem; font-family: var(--f-display); font-weight: 600; letter-spacing: .14em;
  font-size: .75rem; color: var(--navy-900); cursor: pointer;
}
@media (max-width: 1020px) {
  .nav-toggle { display: inline-block; }
  .brand img { height: 48px; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--white); border-bottom: 1px solid var(--line); padding: .5rem var(--gutter) 1rem;
  }
  .nav.open { display: flex; }
  .nav a { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"] { border-bottom-color: var(--line); }
  .nav .nav-cta { margin: .8rem 0 0; text-align: center; padding: .85rem; }
}

/* ---------- Buttons ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; }
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--f-display); font-weight: 600; font-size: .85rem; letter-spacing: .16em; text-transform: uppercase;
  text-decoration: none; padding: .95rem 1.5rem; border-radius: var(--radius); border: 2px solid transparent;
  cursor: pointer; transition: background .2s, color .2s, border-color .2s;
}
.btn::after { content: "→"; font-family: var(--f-body); letter-spacing: 0; }
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-bright); color: var(--white); }
.btn-ghost { border-color: var(--on-navy-muted); color: var(--on-navy); }
.btn-ghost:hover { border-color: var(--white); color: var(--white); }
.btn-dark { background: var(--navy-900); color: var(--white); }
.btn-dark:hover { background: var(--blue); color: var(--white); }
.btn-outline { border-color: var(--navy-900); color: var(--navy-900); }
.btn-outline:hover { background: var(--navy-900); color: var(--white); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: var(--on-navy);
  background: radial-gradient(120% 140% at 85% 10%, var(--navy-700) 0%, var(--navy-900) 45%, var(--navy-950) 100%);
}
.hero canvas.traces { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; padding-block: clamp(4rem, 9vw, 7.5rem); display: grid; gap: 1.6rem; }
.hero h1 { color: var(--white); max-width: 15ch; }
.hero h1 .accent { color: var(--blue-bright); }
.hero p { color: var(--on-navy-muted); font-size: 1.15rem; }
.hero .eyebrow { color: var(--blue-bright); }
.hero-sub { padding-block: clamp(3rem, 6vw, 5rem); }
.hero-sub h1 { font-size: clamp(2.1rem, 4.4vw, 3.3rem); max-width: 20ch; }

.tagline {
  font-family: var(--f-display); font-weight: 500; letter-spacing: .42em; text-transform: uppercase;
  font-size: .78rem; color: var(--silver);
}

/* ---------- Sections ---------- */
.band { padding-block: clamp(3.5rem, 7vw, 6rem); }
.band-paper { background: var(--paper); }
.band-navy { background: var(--navy-900); color: var(--on-navy); }
.band-navy h2, .band-navy h3 { color: var(--white); }
.band-navy p { color: var(--on-navy-muted); }
.band-navy .eyebrow { color: var(--blue-bright); }

.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.split > * { min-width: 0; }
@media (max-width: 860px) { .split { grid-template-columns: minmax(0, 1fr); } }

/* Category cards */
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
@media (max-width: 1000px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); } }

.cat { background: var(--white); padding: 2rem 1.6rem; display: grid; gap: .9rem; align-content: start; transition: background .2s; }
.cat:hover { background: var(--paper); }
.code {
  font-family: var(--f-mono); font-size: .74rem; letter-spacing: .08em; color: var(--blue);
  border: 1px solid currentColor; border-radius: 2px; padding: .15rem .45rem; justify-self: start;
}
.cat h3 { font-size: 1.12rem; letter-spacing: .04em; text-transform: uppercase; }
.cat p { color: var(--muted); font-size: .97rem; }

/* Approach / feature items */
.feature { display: grid; gap: .6rem; padding-top: 1.2rem; border-top: 2px solid var(--blue); }
.feature p { color: var(--muted); font-size: .98rem; }
.band-navy .feature { border-top-color: var(--blue-bright); }

/* Spec card (example submission) */
.spec {
  background: var(--navy-950); color: var(--on-navy); border-radius: var(--radius);
  border: 1px solid var(--navy-700); font-family: var(--f-mono); font-size: .88rem; overflow: hidden;
}
.spec-head { display: flex; justify-content: space-between; gap: 1rem; padding: .8rem 1.2rem; border-bottom: 1px solid var(--navy-700); color: var(--on-navy-muted); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; }
.spec dl { margin: 0; padding: .6rem 1.2rem 1.1rem; display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 1.4rem; row-gap: .45rem; }
.spec dt { color: var(--on-navy-muted); }
.spec dd { margin: 0; color: var(--white); overflow-wrap: anywhere; }

/* Lists */
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.ticks li { position: relative; padding-left: 1.4rem; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .68em; width: .55rem; height: .55rem; border: 2px solid var(--blue); transform: rotate(45deg); }
.ticks.cols { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 2rem; }
@media (max-width: 620px) { .ticks.cols { grid-template-columns: minmax(0, 1fr); } }

.tags { display: flex; flex-wrap: wrap; gap: .6rem; }
.tags span {
  font-family: var(--f-display); font-weight: 600; font-size: .82rem; letter-spacing: .1em; text-transform: uppercase;
  padding: .55rem .95rem; border: 1px solid var(--line); background: var(--white); color: var(--navy-900); border-radius: var(--radius);
}

/* Capability blocks */
.cap { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: clamp(1.5rem, 4vw, 4rem); padding-block: 2.8rem; border-top: 1px solid var(--line); }
.cap:first-child { border-top: 0; padding-top: 0; }
.cap > * { min-width: 0; }
.cap-head { display: grid; gap: .8rem; align-content: start; }
.cap-body { display: grid; gap: 1.2rem; }
.cap-body .note { font-size: .95rem; color: var(--muted); border-left: 3px solid var(--silver); padding-left: 1rem; }
@media (max-width: 820px) { .cap { grid-template-columns: minmax(0, 1fr); } }

/* Industries */
.industry { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; display: grid; gap: .7rem; align-content: start; }
.industry p { color: var(--muted); font-size: .97rem; }

/* Process steps — a real sequence, so numbered */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.2rem 2rem; counter-reset: step; }
.steps li { counter-increment: step; display: grid; gap: .5rem; align-content: start; }
.steps li::before {
  content: "STEP " counter(step, decimal-leading-zero); font-family: var(--f-mono); font-size: .76rem; letter-spacing: .1em; color: var(--blue-bright);
  padding-bottom: .6rem; border-bottom: 1px solid var(--navy-700);
}
@media (max-width: 860px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* Insights */
.article { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
.article summary { list-style: none; cursor: pointer; padding: 1.6rem 1.8rem; display: grid; gap: .6rem; }
.article summary::-webkit-details-marker { display: none; }
.article .meta { font-family: var(--f-mono); font-size: .74rem; letter-spacing: .08em; color: var(--blue); text-transform: uppercase; }
.article summary p { color: var(--muted); font-size: .97rem; }
.article .more { font-family: var(--f-display); font-weight: 600; font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; color: var(--navy-900); }
.article .more::after { content: " +"; }
.article[open] .more::after { content: " −"; }
.article .body { padding: 0 1.8rem 1.8rem; display: grid; gap: 1rem; border-top: 1px solid var(--line); padding-top: 1.4rem; margin-inline: 0; }
.article .body p { font-size: 1rem; }

/* CTA strip */
.cta-strip { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 2rem; }
.cta-strip > div { min-width: 0; display: grid; gap: .8rem; }

/* Forms */
.form { display: grid; gap: 1.1rem; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2.2rem); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem; }
@media (max-width: 620px) { .form-row { grid-template-columns: minmax(0, 1fr); } }
.field { display: grid; gap: .35rem; min-width: 0; }
.field label { font-family: var(--f-mono); font-size: .76rem; letter-spacing: .06em; text-transform: uppercase; color: var(--navy-700); }
.field .opt { color: var(--muted); text-transform: none; letter-spacing: 0; }
.field input, .field select, .field textarea {
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem .85rem; width: 100%;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--blue); outline-offset: 0; background: var(--white); }
.form .hp { position: absolute; left: -9999px; }
.form-status { font-size: .95rem; padding: .9rem 1rem; border-radius: var(--radius); }
.form-status.ok { background: #e6f2ea; color: #1c5a32; }
.form-status.err { background: #fbecec; color: #8a1f1f; }
.form button[type="submit"]::after { content: "→"; }

.email-box { display: grid; gap: .4rem; padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.email-box .label { font-family: var(--f-mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.email-box a { font-family: var(--f-display); font-weight: 600; font-size: 1.2rem; text-decoration: none; overflow-wrap: anywhere; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-950); color: var(--on-navy-muted); padding-block: 3.5rem 2rem; font-size: .93rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 2.5rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: minmax(0, 1fr); } }
.wordmark { font-family: var(--f-display); font-weight: 700; font-size: 1.35rem; letter-spacing: .14em; color: var(--white); }
.site-footer h4 { font-family: var(--f-display); font-size: .78rem; letter-spacing: .2em; text-transform: uppercase; color: var(--white); margin-bottom: .8rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .45rem; }
.site-footer a { color: var(--on-navy); text-decoration: none; }
.site-footer a:hover { color: var(--blue-bright); }
.footer-base { margin-top: 2.5rem; padding-top: 1.4rem; border-top: 1px solid var(--navy-700); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: .84rem; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }