/* NEIT site.css: the original dark/silver design, one stylesheet, no build step. */

@font-face { font-family: "Inter"; src: url("/fonts/Inter-latin-var.woff2") format("woff2"); font-weight: 400 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Poppins"; src: url("/fonts/Poppins-600-latin.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Poppins"; src: url("/fonts/Poppins-700-latin.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }

:root {
  --base: #080808;
  --surface: #111111;
  --elevated: #1a1a1a;
  --border: #2a2a2a;
  --border-hover: #3a3a3a;
  --input-border: #666666;
  --muted: #8a8a8a;
  --dim: #a3a3a3;
  --silver: #c0c0c0;
  --bright: #e8e8e8;
  --white: #ffffff;
  --error: #f87171;

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --heading: "Poppins", "Inter", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-h3: 1.0625rem;
  --fs-h2: clamp(1.875rem, 1.45rem + 1.4vw, 2.5rem);
  --fs-h1: clamp(2.5rem, 1.6rem + 3.4vw, 4rem);

  --s1: 0.25rem; --s2: 0.5rem; --s3: 0.75rem; --s4: 1rem; --s5: 1.5rem; --s6: 2rem; --s7: 3rem; --s8: 5rem; --s9: 6.5rem;

  --r-sm: 6px;
  --r: 12px;
  --container: 80rem;
  --gutter: 1rem;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; color-scheme: dark; }
body {
  margin: 0; background: var(--base); color: var(--bright);
  font-family: var(--sans); font-size: var(--fs-base); line-height: 1.65;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
}
h1, h2, h3 { margin: 0 0 var(--s4); font-family: var(--heading); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; color: var(--bright); text-wrap: balance; }
h1 { font-size: var(--fs-h1); line-height: 1.08; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: 600; letter-spacing: -0.005em; line-height: 1.35; }
p, ul, ol, dl { margin: 0 0 var(--s4); }
p:last-child, ul:last-child, ol:last-child, dl:last-child { margin-bottom: 0; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
strong { color: var(--bright); font-weight: 600; }
::selection { background: var(--silver); color: var(--base); }

a { color: var(--silver); text-decoration-thickness: 1px; text-underline-offset: 0.2em; transition: color 0.2s; }
a:hover { color: var(--white); }
:focus-visible { outline: 2px solid var(--bright); outline-offset: 3px; border-radius: 3px; }

/* Layout */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--s8); }
.band { background: var(--surface); }
.section + .section, .pointer + .section, .section + .pointer { border-top: 1px solid var(--border); }
.section-head { max-width: 42rem; margin-bottom: var(--s7); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head .lead { margin-top: var(--s4); }
.grid-2, .grid-3 { display: grid; gap: var(--s4); }
.split { display: grid; gap: var(--s7); align-items: start; }
@media (min-width: 40rem) { :root { --gutter: 1.5rem; } }
@media (min-width: 48rem) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 64rem) {
  :root { --gutter: 2rem; }
  .section { padding-block: var(--s9); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .split { grid-template-columns: 1fr 1fr; gap: var(--s8); }
}
.narrow { max-width: 56rem; margin-inline: auto; }
.contact-split { max-width: 64rem; }
@media (min-width: 64rem) { .contact-split { gap: var(--s7); } }

/* Type helpers */
.label-line {
  display: inline-block; margin-bottom: var(--s5); padding-bottom: var(--s1);
  border-bottom: 1px solid var(--border);
  color: var(--muted); font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; line-height: 1.6;
}
.gradient-text {
  background: linear-gradient(90deg, #b4b4b4 0%, #ffffff 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}
.lead { font-size: var(--fs-lg); color: var(--dim); max-width: 38rem; line-height: 1.7; }
.dim { color: var(--dim); }
.muted { color: var(--muted); }
.small { font-size: var(--fs-sm); }
.text-center { text-align: center; }

/* Skip link */
.skip-link { position: absolute; left: var(--s4); top: -100px; z-index: 100; }
.skip-link:focus { top: var(--s4); }

/* Icons */
.icon { width: 1.125em; height: 1.125em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.icon-wrap {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 2.5rem; height: 2.5rem; border-radius: 8px;
  background: var(--elevated); border: 1px solid var(--border); color: var(--silver);
  transition: border-color 0.25s, color 0.25s;
}
.icon-wrap .icon { width: 1.125rem; height: 1.125rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s2);
  min-height: 2.875rem; padding: 0.75rem 1.75rem;
  border: 1px solid transparent; border-radius: var(--r-sm);
  font: inherit; font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; line-height: 1.2;
  text-align: center; text-decoration: none; cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.25s;
}
.btn-primary { background: var(--silver); border-color: var(--silver); color: var(--base); }
.btn-primary:hover { background: var(--bright); border-color: var(--bright); color: var(--base); box-shadow: 0 0 0 4px rgba(232, 232, 232, 0.08), 0 8px 28px -10px rgba(255, 255, 255, 0.35); }
.btn-ghost { background: transparent; border-color: rgba(192, 192, 192, 0.35); color: var(--silver); font-weight: 500; }
.btn-ghost:hover { border-color: var(--silver); background: rgba(192, 192, 192, 0.06); color: var(--white); }
.btn-sm { min-height: 2.25rem; padding: 0.5rem 1rem; font-size: 0.75rem; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn .icon { width: 1rem; height: 1rem; }

/* Header + nav */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(8, 8, 8, 0.82); -webkit-backdrop-filter: saturate(140%) blur(12px); backdrop-filter: saturate(140%) blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s4); min-height: 3.75rem; }
.wordmark { display: inline-flex; align-items: center; min-height: 44px; color: var(--silver); font-family: var(--heading); font-weight: 700; font-size: 1.125rem; letter-spacing: 0.16em; text-decoration: none; line-height: 1; }
.wordmark:hover { color: var(--white); }
.nav-links { display: none; align-items: center; gap: var(--s6); margin: 0; padding: 0; list-style: none; }
.nav-links a, .nav-mobile li a:not(.btn) { color: var(--dim); font-size: var(--fs-sm); letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--white); }
.header-actions { display: flex; align-items: center; gap: var(--s3); }
.header-cta { display: none; }

.nav-mobile { position: relative; }
.nav-mobile summary { display: inline-flex; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; border: 1px solid var(--border); border-radius: var(--r-sm); color: var(--silver); cursor: pointer; list-style: none; transition: border-color 0.2s; }
.nav-mobile summary:hover { border-color: var(--silver); }
.nav-mobile summary::-webkit-details-marker { display: none; }
.nav-mobile summary .icon { width: 1.25rem; height: 1.25rem; }
.nav-mobile[open] .icon-menu, .nav-mobile:not([open]) .icon-close { display: none; }
.nav-mobile ul { position: absolute; right: 0; top: calc(100% + 0.625rem); width: min(17rem, calc(100vw - 2 * var(--gutter))); margin: 0; padding: var(--s3); list-style: none; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.8); }
.nav-mobile li a:not(.btn) { display: block; padding: var(--s3); border-radius: var(--r-sm); }
.nav-mobile li a:not(.btn):hover { background: var(--elevated); color: var(--white); }
.nav-mobile .btn { width: 100%; margin-top: var(--s2); }
@media (min-width: 22rem) { .header-cta { display: inline-flex; } .nav-mobile-cta { display: none; } }
@media (min-width: 52rem) {
  .nav-links { display: flex; }
  .nav-mobile { display: none; }
}

/* Hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--border); padding-block: var(--s7) var(--s8); }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: radial-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px); background-size: 24px 24px; -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent); mask-image: linear-gradient(to bottom, #000 55%, transparent); }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(60rem 32rem at 85% 30%, rgba(255, 255, 255, 0.045), transparent 70%), linear-gradient(135deg, transparent 50%, rgba(17, 17, 17, 0.8)); }
.hero > .container { position: relative; z-index: 1; }
.hero-grid { display: grid; gap: var(--s7); align-items: center; }
.hero-logo { width: auto; height: 5rem; margin-bottom: var(--s6); }
.hero h1 { margin-bottom: var(--s5); }
.h1-long { font-size: clamp(2.25rem, 1.5rem + 2.6vw, 3.25rem); }
.hero .lead { margin-bottom: var(--s4); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s4) var(--s5); margin-block: var(--s6) var(--s5); }
.hero-notes p { margin-bottom: var(--s2); color: var(--muted); font-size: var(--fs-sm); }
@media (min-width: 48rem) { .hero-logo { height: 7rem; } }
@media (min-width: 64rem) {
  .hero { padding-block: var(--s8) var(--s9); min-height: min(85vh, 56rem); display: flex; align-items: center; }
  .hero > .container { width: 100%; }
  .hero-grid { grid-template-columns: 1.1fr 1fr; gap: var(--s8); }
}

/* Panel (hero "free review" card) */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 30px 60px -30px rgba(0, 0, 0, 0.9); }
.panel-head { margin: 0; padding: var(--s4) var(--s5); background: var(--elevated); border-bottom: 1px solid var(--border); color: var(--silver); font-family: var(--heading); font-size: var(--fs-sm); font-weight: 600; letter-spacing: 0; }
.panel-body { padding: var(--s5); font-size: var(--fs-sm); }
.panel-body p { color: var(--dim); }

/* Cards */
.card { position: relative; overflow: hidden; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: var(--s5); transition: border-color 0.25s, background-color 0.25s; }
.card::before { content: ""; position: absolute; left: 0; top: var(--s5); bottom: var(--s5); width: 2px; border-radius: 0 2px 2px 0; background: linear-gradient(to bottom, var(--white), var(--silver)); transform: scaleY(0); transform-origin: top; transition: transform 0.35s var(--ease); }
.card:hover { border-color: var(--border-hover); }
.card:hover::before { transform: scaleY(1); }
.card:hover .icon-wrap { border-color: #555; color: var(--white); }
.card-static::before { display: none; }
.card-head { display: flex; align-items: center; gap: var(--s3); margin-bottom: var(--s3); }
.card-head h3 { margin: 0; }
.card > p, .card-body { color: var(--dim); font-size: var(--fs-sm); line-height: 1.7; }
.card > h3 { margin-bottom: var(--s4); }
.card-eng { background: var(--base); }
.card-eng h3, .mono { font-family: var(--mono); font-weight: 600; font-size: 0.9375rem; letter-spacing: -0.01em; }
.elevated { background: var(--elevated); }

/* Lists */
.checklist, .xlist { margin: 0 0 var(--s4); padding: 0; list-style: none; }
.checklist li, .xlist li { display: flex; gap: var(--s3); padding-block: 0.3125rem; color: var(--dim); font-size: var(--fs-sm); line-height: 1.6; }
.checklist .icon { color: var(--silver); margin-top: 0.2em; width: 1rem; height: 1rem; stroke-width: 2.25; }
.xlist .icon { color: var(--muted); margin-top: 0.2em; width: 1rem; height: 1rem; }
.checklist.bright li { color: var(--bright); }
.list-foot { margin-top: var(--s4); padding-top: var(--s4); border-top: 1px solid var(--border); color: var(--silver); }

/* Rules ("My rules") */
.rules { display: grid; gap: var(--s4); margin: 0; padding: 0; list-style: none; }
@media (min-width: 48rem) { .rules { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .rules { grid-template-columns: repeat(3, 1fr); } }
.rule { display: flex; gap: var(--s5); align-items: flex-start; }
.rule-num { flex: none; width: 1.75rem; font-family: var(--heading); font-weight: 700; font-size: 2.25rem; line-height: 1; }
.rule h3 { margin-bottom: var(--s2); }
.rule p { color: var(--dim); font-size: var(--fs-sm); line-height: 1.7; }

/* Steps ("How it works") */
.steps { display: grid; gap: var(--s4); margin: 0 0 var(--s7); padding: 0; list-style: none; }
@media (min-width: 64rem) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step { display: flex; flex-direction: column; }
.step-top { display: flex; align-items: center; gap: var(--s4); margin-bottom: var(--s5); }
.step-num { display: inline-flex; align-items: center; justify-content: center; flex: none; width: 3rem; height: 3rem; border-radius: 50%; background: var(--silver); color: var(--base); font-family: var(--heading); font-weight: 700; font-size: 1.125rem; box-shadow: 0 0 0 6px rgba(192, 192, 192, 0.08); }
.step-label { display: block; color: var(--muted); font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; }
.step-top h3 { margin: 0; }
.step .checklist { flex: 1; }
.step-foot { margin: auto 0 0; padding-top: var(--s4); border-top: 1px solid var(--border); color: var(--muted); font-size: var(--fs-sm); line-height: 1.7; }
.step-foot strong { color: var(--silver); }

/* Pointer strip (homepage -> /engineering) */
.pointer { background: var(--surface); padding-block: var(--s5); }
.pointer p { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: var(--s2) var(--s3); margin: 0; color: var(--dim); font-size: var(--fs-sm); text-align: center; }
.pointer a { display: inline-flex; align-items: center; gap: var(--s2); color: var(--silver); font-weight: 600; text-decoration: none; }
.pointer a:hover { color: var(--white); }
.pointer a .icon { transition: transform 0.25s var(--ease); }
.pointer a:hover .icon { transform: translateX(3px); }

/* About */
.prose { max-width: 40rem; }
.prose p { color: var(--dim); font-size: var(--fs-lg); line-height: 1.75; margin-bottom: var(--s5); }
.signature { margin-top: var(--s6); padding-top: var(--s5); border-top: 1px solid var(--border); }
.prose .signature { font-size: var(--fs-base); }
.signature strong { display: block; font-family: var(--heading); font-weight: 600; color: var(--bright); }
.signature span { display: block; color: var(--muted); font-size: var(--fs-sm); }

/* Facts list */
.facts { margin: 0; }
.facts div { display: grid; gap: var(--s1); padding-block: var(--s4); }
.facts div:first-child { padding-top: 0; }
.facts div:last-child { padding-bottom: 0; }
.facts div + div { border-top: 1px solid var(--border); }
.facts dt { color: var(--muted); font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; }
.facts dd { margin: 0; color: var(--bright); font-size: var(--fs-sm); line-height: 1.65; }
@media (min-width: 40rem) { .facts div { grid-template-columns: 9.5rem 1fr; gap: var(--s4); } .facts dt { padding-top: 0.15em; } }

/* Contact rows (icon tile + text) */
.contact-rows { display: grid; gap: var(--s4); margin: var(--s6) 0 0; padding: 0; list-style: none; }
.contact-rows li { display: flex; align-items: center; gap: var(--s4); color: var(--dim); font-size: var(--fs-sm); }
.contact-rows a { color: var(--dim); text-decoration: none; }
.contact-rows a:hover { color: var(--white); }
.contact-rows .who { display: block; color: var(--silver); font-weight: 500; }
.contact-rows .role { display: block; color: var(--muted); font-size: var(--fs-xs); }

/* FAQ */
.faq { display: grid; gap: var(--s3); max-width: 48rem; margin-inline: auto; }
.faq details { background: var(--elevated); border: 1px solid var(--border); border-radius: var(--r); transition: border-color 0.2s; }
.faq details:hover, .faq details[open] { border-color: var(--border-hover); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: var(--s4); padding: 1.125rem var(--s5); color: var(--bright); font-size: 0.9375rem; font-weight: 500; cursor: pointer; list-style: none; border-radius: var(--r); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icon { color: var(--muted); width: 1rem; height: 1rem; transition: transform 0.25s var(--ease), color 0.2s; }
.faq summary:hover .icon, .faq details[open] summary .icon { color: var(--silver); }
.faq details[open] summary .icon { transform: rotate(180deg); }
.faq-body { padding: 0 var(--s5) var(--s5); color: var(--dim); font-size: var(--fs-sm); line-height: 1.75; }

/* Forms */
.form-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: var(--s5); }
@media (min-width: 40rem) { .form-card { padding: var(--s6); } }
.form { display: grid; gap: var(--s5); }
.field { display: grid; gap: var(--s2); }
.label { color: var(--silver); font-size: var(--fs-xs); font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; }
.label .req, .label .opt { color: var(--muted); letter-spacing: 0.04em; text-transform: none; }
.input {
  width: 100%; min-height: 2.875rem; padding: 0.75rem 0.875rem;
  background: var(--elevated); color: var(--bright); border: 1px solid var(--input-border); border-radius: var(--r-sm);
  font: inherit; font-size: var(--fs-sm); transition: border-color 0.2s, box-shadow 0.2s;
}
.input::placeholder { color: var(--muted); opacity: 1; }
.input:hover { border-color: #808080; }
.input:focus { outline: none; border-color: var(--silver); box-shadow: 0 0 0 3px rgba(192, 192, 192, 0.25); }
textarea.input { min-height: 7.5rem; resize: vertical; }
select.input { appearance: none; padding-right: 2.5rem; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23c0c0c0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.875rem center; background-size: 1rem; }
select.input option { background: var(--elevated); color: var(--bright); }
.input[aria-invalid="true"] { border-color: var(--error); }
.field-error { margin: 0; color: var(--error); font-size: var(--fs-xs); font-weight: 500; }
.form-note { margin: 0; color: var(--muted); font-size: var(--fs-xs); line-height: 1.6; }
.form-note a { color: var(--dim); }
.form .btn { width: 100%; }
.alert { padding: var(--s4); border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--elevated); font-size: var(--fs-sm); }
.alert-success { color: var(--silver); border-color: #4a4a4a; }
.alert-error { color: var(--dim); border-color: var(--error); }
.alert:focus { outline: 2px solid var(--bright); outline-offset: 2px; }
.cf-turnstile { min-height: 65px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding-block: var(--s8) var(--s6); font-size: var(--fs-sm); }
.footer-grid { display: grid; gap: var(--s6); margin-bottom: var(--s7); }
@media (min-width: 48rem) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-about p { margin-top: var(--s4); color: var(--muted); max-width: 24rem; line-height: 1.7; }
.footer-title { margin: 0 0 var(--s4); color: var(--dim); font-family: var(--sans); font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; }
.footer-list { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--s3); }
.footer-list a { color: var(--muted); text-decoration: none; }
.footer-list a:hover { color: var(--white); }
.footer-cta { margin-top: var(--s5); }
.footer-bottom { margin: 0; padding-top: var(--s5); border-top: 1px solid var(--border); color: var(--muted); text-align: center; }

/* Motion: load-in only, CSS only */
@keyframes fade-up { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fade-up 0.7s var(--ease) both; }
.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.2s; }

/* Utilities */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.mt-6 { margin-top: var(--s6); }
.mb-0 { margin-bottom: 0; }
.mb-6 { margin-bottom: var(--s6); }
.mx-auto { margin-inline: auto; }

/* Legal / simple pages */
.page-narrow { max-width: 46rem; }
.legal p, .legal li { color: var(--dim); line-height: 1.75; }
.legal h2 { margin-top: var(--s7); font-size: 1.375rem; }
.legal ul { padding-left: 1.25rem; }
.legal li + li { margin-top: var(--s2); }
.legal li::marker { color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
}