/* CogniVision — vision-cognitive dark theme */
:root {
  --obsidian: #0B0C10;
  --teal: #14B8A6;
  --violet: #8B5CF6;
  --panel: #1F2833;
  --text: #E2E8F0;
  --text-muted: #94A3B8;
  --border-teal: rgba(20, 184, 166, 0.45);
  --border-violet: rgba(139, 92, 246, 0.45);
  --glass: rgba(31, 40, 51, 0.72);
  --font-head: "Oswald", sans-serif;
  --font-body: "Roboto", sans-serif;
  --snap: cubic-bezier(0.2, 0.9, 0.3, 1);
  --dur: 0.4s;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--obsidian);
}

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

a {
  color: var(--teal);
  text-decoration: none;
  transition: color var(--dur) var(--snap);
}

a:hover { color: var(--violet); }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }

p { margin: 0 0 1rem; }

.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

/* Scroll animations — progressive enhancement */
.slide-up, .fade-in {
  opacity: 1;
  transform: none;
  transition: opacity var(--dur) var(--snap), transform var(--dur) var(--snap);
}

html.js .slide-up,
html.js .fade-in {
  opacity: 0;
  transform: translateY(28px);
}

html.js .slide-up.visible,
html.js .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(20, 184, 166, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1140px, 92vw);
  margin: 0 auto;
  padding: 0.85rem 0;
  gap: 1rem;
}

.logo {
  font-family: var(--font-head);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.logo span { color: var(--teal); }

.main-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
  align-items: center;
}

.main-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--teal);
}

.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--dur) var(--snap), color var(--dur) var(--snap), transform var(--dur) var(--snap);
}

.btn-primary {
  background-color: var(--teal);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--violet);
  color: #fff;
}

.btn-outline {
  background-color: transparent;
  color: var(--teal);
  border: 2px solid var(--teal);
}

.btn-outline:hover {
  background-color: var(--violet);
  border-color: var(--violet);
  color: #fff;
}

.header-cta { margin-left: 0.5rem; }

.nav-toggle {
  display: none;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border-teal);
  padding: 0.5rem 0.85rem;
  font-family: var(--font-head);
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 4px;
}

main { padding-top: 72px; }

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0 3.5rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 40%, rgba(20, 184, 166, 0.12), transparent),
    radial-gradient(ellipse 70% 50% at 80% 60%, rgba(139, 92, 246, 0.1), transparent);
  pointer-events: none;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin-bottom: 1.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}

.pipeline-panel {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid var(--border-teal);
  background: var(--panel);
}

.pipeline-panel:nth-child(2) {
  border-color: var(--border-violet);
}

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

.pipeline-label {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  font-family: var(--font-head);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.65rem;
  background: rgba(11, 12, 16, 0.85);
  color: var(--teal);
  border-radius: 3px;
}

.pipeline-panel:nth-child(2) .pipeline-label { color: var(--violet); }

.pipeline-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.pipeline-connector::before,
.pipeline-connector::after {
  content: "";
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--violet));
  max-width: 120px;
}

/* Stats */
.stats-band {
  background: var(--panel);
  padding: 2.5rem 0;
  border-top: 1px solid rgba(20, 184, 166, 0.2);
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}

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

.stat-item h3 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  color: var(--teal);
  margin-bottom: 0.25rem;
}

.stat-item:nth-child(even) h3 { color: var(--violet); }

.stat-item p {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-alt { background: var(--panel); }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.section-head p { color: var(--text-muted); }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.glass-card {
  background: var(--glass);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-teal);
  transition: transform var(--dur) var(--snap), border-color var(--dur) var(--snap);
}

.glass-card:nth-child(even) { border-color: var(--border-violet); }

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--teal);
}

.glass-card:nth-child(even):hover { border-color: var(--violet); }

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

.glass-card-body { padding: 1.25rem 1.35rem 1.5rem; }

.ref-code {
  font-size: 0.75rem;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.price-tag {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--violet);
  margin: 0.75rem 0;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Stack strip */
.stack-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid rgba(20, 184, 166, 0.25);
  border-radius: 8px;
  overflow: hidden;
}

.stack-item {
  padding: 2rem 1.5rem;
  text-align: center;
  background: var(--panel);
  border-right: 1px solid rgba(20, 184, 166, 0.2);
}

.stack-item:last-child { border-right: none; }

.stack-item h3 {
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.stack-item:nth-child(2) h3 { color: var(--violet); }

.stack-item:nth-child(3) h3 { color: var(--text); }

/* Services list */
.services-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.service-block {
  padding: 1.5rem;
  background: var(--glass);
  border-left: 4px solid var(--teal);
  border-radius: 0 8px 8px 0;
}

.service-block:nth-child(even) { border-left-color: var(--violet); }

/* Hardware list */
.hw-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.hw-list li {
  padding: 1rem 1.15rem;
  background: rgba(11, 12, 16, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 6px;
  font-size: 0.9rem;
}

.hw-list strong {
  display: block;
  font-family: var(--font-head);
  color: var(--teal);
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}

/* Testimonials */
.testimonials-dark {
  background: #06070a;
  padding: 4rem 0;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  padding: 1.75rem;
  border: 1px solid rgba(20, 184, 166, 0.25);
  border-radius: 8px;
  background: var(--panel);
}

.testimonial-card blockquote {
  margin: 0 0 1rem;
  font-style: italic;
  color: var(--text);
}

.testimonial-card cite {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: normal;
}

/* CTA */
.cta-band {
  background: linear-gradient(135deg, var(--teal) 0%, #0d9488 50%, var(--violet) 100%);
  padding: 3.5rem 0;
  text-align: center;
}

.cta-band h2 {
  color: #fff;
  margin-bottom: 0.75rem;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 520px;
  margin: 0 auto 1.5rem;
}

.cta-band .btn-primary {
  background-color: var(--obsidian);
  color: #fff;
}

.cta-band .btn-primary:hover {
  background-color: #fff;
  color: var(--obsidian);
}

/* Footer */
.site-footer {
  background: #06070a;
  padding: 2.5rem 0 1.5rem;
  border-top: 1px solid rgba(20, 184, 166, 0.15);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  font-size: 0.85rem;
  color: var(--teal);
  margin-bottom: 0.75rem;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li { margin-bottom: 0.4rem; }

.footer-grid a { color: var(--text-muted); }

.footer-bottom {
  padding-top: 1.25rem;
  border-top: 1px solid rgba(31, 40, 51, 0.8);
  color: var(--text-muted);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}

/* Page hero */
.page-hero {
  padding: 3rem 0 2rem;
  background: linear-gradient(180deg, var(--panel) 0%, var(--obsidian) 100%);
}

.page-hero .breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.page-hero .breadcrumb a { color: var(--teal); }

/* Collection filter */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
}

.filter-btn {
  font-family: var(--font-head);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 1rem;
  background: var(--panel);
  color: var(--text-muted);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--dur) var(--snap), color var(--dur) var(--snap), border-color var(--dur) var(--snap);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--teal);
  color: #fff;
  border-color: var(--teal);
}

.collection-card.hidden {
  display: none;
}

.collection-grid .glass-card { margin-bottom: 0; }

/* Contact form */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  background: var(--obsidian);
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 4px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--teal);
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: #f87171;
}

.error-msg {
  display: block;
  font-size: 0.8rem;
  color: #f87171;
  margin-top: 0.35rem;
  min-height: 1.1em;
}

.alert-success {
  display: none;
  padding: 2rem;
  background: var(--panel);
  border: 2px solid var(--teal);
  border-radius: 8px;
}

.alert-success.visible {
  display: block;
  animation: fadeIn var(--dur) var(--snap);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* About / services extras */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.cert-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.cert-list li {
  padding: 0.5rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border-violet);
  border-radius: 4px;
  font-size: 0.85rem;
}

.legal-content {
  max-width: 760px;
}

.legal-content h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
}

.legal-content ul { padding-left: 1.25rem; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background: var(--panel);
  border-top: 2px solid var(--teal);
  padding: 1.25rem;
  transform: translateY(100%);
  transition: transform var(--dur) var(--snap);
}

.cookie-banner.visible { transform: translateY(0); }

.cookie-inner {
  width: min(1140px, 92vw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cookie-inner p {
  margin: 0;
  flex: 1;
  min-width: 240px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cookie-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Dual path draw */
.dual-path-svg {
  width: 100%;
  max-width: 200px;
  height: 40px;
  margin: 0 auto;
}

html.js .dual-path-line {
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  transition: stroke-dashoffset 1.2s var(--snap);
}

html.js .dual-path-line.drawn { stroke-dashoffset: 0; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .stats-grid,
  .stack-strip,
  .testimonial-grid,
  .footer-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .stack-item { border-right: none; border-bottom: 1px solid rgba(20, 184, 166, 0.2); }
  .stack-item:last-child { border-bottom: none; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(11, 12, 16, 0.98);
    border-bottom: 1px solid var(--border-teal);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--dur) var(--snap);
  }

  .main-nav.open { max-height: 320px; }

  .main-nav ul {
    flex-direction: column;
    padding: 1rem;
    gap: 0.75rem;
  }

  .header-cta {
    display: none;
  }

  .main-nav .nav-cta-mobile {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 0.5rem;
  }
}

@media (min-width: 769px) {
  .nav-cta-mobile { display: none; }
}