@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;600&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --graphite: #101418;
  --mist: #ECF0F2;
  --signal: #B6FF3C;
  --slate: #2A3440;
  --slate-light: #3D4A58;
  --text-on-dark: #ECF0F2;
  --text-on-light: #101418;
  --text-muted: #8A96A3;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --radius: 6px;
  --header-h: 72px;
  --max-w: 1180px;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text-on-light);
  background: var(--mist);
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--signal); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 600;
  margin-top: 0;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }

p { margin: 0 0 1rem; }

ul, ol { margin: 0 0 1rem; padding-left: 1.4rem; }
li { margin-bottom: 0.4rem; }

code, .mono { font-family: var(--font-mono); font-size: 0.92em; }

/* Surfaces */
.surface-graphite { background: var(--graphite); color: var(--text-on-dark); }
.surface-mist { background: var(--mist); color: var(--text-on-light); }
.surface-slate { background: var(--slate); color: var(--text-on-dark); }
.surface-signal { background: var(--signal); color: var(--graphite); }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(16, 20, 24, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(182, 255, 60, 0.12);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-on-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover { color: var(--signal); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-on-dark);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  opacity: 0.85;
}

.site-nav a:hover,
.site-nav a.is-active {
  opacity: 1;
  color: var(--signal);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--signal);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--signal);
  color: var(--graphite);
  border-color: var(--signal);
}

.btn-primary:hover {
  background: #c8ff5e;
  color: var(--graphite);
  border-color: #c8ff5e;
}

.btn-secondary {
  background: transparent;
  color: var(--text-on-dark);
  border-color: rgba(236, 240, 242, 0.35);
}

.btn-secondary:hover {
  border-color: var(--signal);
  color: var(--signal);
}

.surface-mist .btn-secondary {
  color: var(--graphite);
  border-color: var(--slate-light);
}

.surface-mist .btn-secondary:hover {
  border-color: var(--graphite);
  color: var(--graphite);
}

/* Main offset */
main { padding-top: var(--header-h); min-height: 60vh; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 4.5rem 0; }
.section-tight { padding: 3rem 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--signal);
  margin-bottom: 0.75rem;
}

.surface-mist .eyebrow { color: var(--slate-light); }

.lead { font-size: 1.2rem; line-height: 1.6; max-width: 42rem; }

/* Control Surface Hero — full bleed */
.hero-control-surface {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  background: var(--graphite);
  overflow: hidden;
}

.hero-control-surface__bg {
  position: absolute;
  inset: 0;
  background-image: url('/images/cognicircuit-01-hero-control-surface.jpg');
  background-size: cover;
  background-position: center;
}

.hero-control-surface__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(16, 20, 24, 0.55) 0%,
    rgba(16, 20, 24, 0.72) 45%,
    rgba(16, 20, 24, 0.94) 100%
  );
}

.hero-control-surface__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 1.5rem 4.5rem;
}

.hero-control-surface h1 {
  max-width: 14ch;
  margin-bottom: 1.25rem;
}

.hero-control-surface .lead {
  max-width: 38rem;
  color: rgba(236, 240, 242, 0.9);
  margin-bottom: 2rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero-signal-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--signal);
  z-index: 3;
}

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* Cards */
.card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(236, 240, 242, 0.08);
}

.surface-mist .card {
  border-color: rgba(16, 20, 24, 0.08);
  background: #fff;
}

.card-body { padding: 1.5rem; }

.card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

.stat-block {
  padding: 1.5rem;
  border-left: 3px solid var(--signal);
}

.stat-block .stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--signal);
}

.surface-mist .stat-block .stat-value { color: var(--graphite); }

/* Page hero (inner pages) */
.page-hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid rgba(236, 240, 242, 0.08);
}

.page-hero-compact { padding: 3.5rem 0 2.5rem; }

/* FAQ */
.faq-list { list-style: none; padding: 0; margin: 0; }

.faq-item {
  border-bottom: 1px solid rgba(16, 20, 24, 0.1);
  padding: 1.25rem 0;
}

.surface-graphite .faq-item,
.surface-slate .faq-item {
  border-color: rgba(236, 240, 242, 0.12);
}

.faq-item summary {
  font-family: var(--font-display);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  color: var(--signal);
  flex-shrink: 0;
}

.faq-item[open] summary::after { content: '−'; }

.faq-item .faq-answer { padding-top: 0.75rem; color: inherit; opacity: 0.92; }

/* Forms */
.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

label {
  display: block;
  font-weight: 500;
  font-size: 0.9375rem;
  margin-bottom: 0.35rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid rgba(16, 20, 24, 0.18);
  border-radius: var(--radius);
  background: #fff;
  color: var(--graphite);
}

textarea { min-height: 140px; resize: vertical; }

.surface-graphite input,
.surface-graphite select,
.surface-graphite textarea,
.surface-slate input,
.surface-slate select,
.surface-slate textarea {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(236, 240, 242, 0.2);
  color: var(--text-on-dark);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-weight: 400;
  cursor: pointer;
}

.checkbox-label input { margin-top: 0.25rem; flex-shrink: 0; }

.form-note {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

/* Work gallery */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.work-item img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: var(--radius);
}

.work-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.surface-mist .work-tag { color: var(--slate-light); }

/* Legal prose */
.legal-prose h2 { margin-top: 2.5rem; }
.legal-prose h3 { margin-top: 1.75rem; }
.legal-prose p, .legal-prose li { max-width: 68ch; }

/* Footer */
.site-footer {
  padding: 3.5rem 0 2rem;
  font-size: 0.9375rem;
  border-top: 3px solid var(--signal);
}

.footer-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.6fr;
  gap: 2.5rem;
}

.footer-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  text-decoration: none;
  opacity: 0.85;
}

.footer-links a:hover { opacity: 1; color: var(--signal); }

.footer-disclaimer {
  font-size: 0.8125rem;
  opacity: 0.75;
  line-height: 1.55;
}

.footer-meta p { margin-bottom: 0.75rem; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 1.25rem 1.5rem;
  border-top: 2px solid var(--signal);
  box-shadow: 0 -8px 32px rgba(16, 20, 24, 0.25);
}

.cookie-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
}

.cookie-inner p { margin: 0; flex: 1 1 280px; }

.cookie-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.cookie-custom {
  width: 100%;
  padding-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cookie-custom.hidden { display: none; }

/* Thanks / 404 */
.status-page {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
}

.status-page h1 { margin-bottom: 1rem; }

/* Utility */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-2 { margin-bottom: 2rem; }
.hidden { display: none !important; }

/* Responsive */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--graphite);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid rgba(182, 255, 60, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a { padding: 0.65rem 0; }

  .grid-2, .grid-3, .grid-4, .work-grid, .form-row-2, .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-control-surface { min-height: 85vh; }
}

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