/* CogniWave — cogniwave.pro */
:root {
  --wave-blue: #0284C7;
  --teal: #14B8A6;
  --ice: #F0F9FF;
  --navy: #0F172A;
  --coral: #F97316;
  --muted: #64748B;
  --border: #BAE6FD;
  --surface: #E0F2FE;
  --white: #FFFFFF;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Lato", system-ui, sans-serif;
  --radius: 18px;
  --max: 1200px;
  --flow-dur: 0.6s;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--navy);
  background: var(--ice);
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--wave-blue); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--teal); }
a:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.75em;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
section { padding: 4rem 0; position: relative; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, transform 0.2s;
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: center;
}
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--teal); color: var(--navy); }
.btn-primary { background: var(--wave-blue); color: #fff; }
.btn-primary:hover { background: var(--teal); color: var(--navy); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--wave-blue);
  color: var(--wave-blue);
}
.btn-outline:hover { background: var(--wave-blue); color: #fff; }
.btn-coral { background: var(--coral); color: #fff; }
.btn-coral:hover { background: #ea580c; color: #fff; }
.btn-cookie { background: var(--wave-blue); color: #fff; }
.btn-cookie:hover { background: var(--teal); color: var(--navy); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(240, 249, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
}
.logo span { color: var(--wave-blue); }
.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}
.nav-menu a {
  color: var(--navy);
  font-weight: 500;
  opacity: 0.85;
}
.nav-menu a:hover,
.nav-menu a.active { opacity: 1; color: var(--teal); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  margin: 5px 0;
  transition: transform 0.3s;
}
.header-cta { font-size: 0.9rem; padding: 0.6rem 1.2rem; }

/* Wave divider */
.wave-divider {
  position: relative;
  height: 60px;
  margin-top: -1px;
  overflow: hidden;
}
.wave-divider svg {
  display: block;
  width: 100%;
  height: 60px;
}
.wave-divider--teal path { fill: var(--teal); }
.wave-divider--ice path { fill: var(--ice); }
.wave-divider--navy path { fill: var(--navy); }
.wave-divider--white path { fill: var(--white); }

/* Hero + parallax bands */
.hero-wave {
  position: relative;
  padding: 5rem 0 4rem;
  overflow: hidden;
  background: linear-gradient(165deg, var(--ice) 0%, var(--surface) 55%, var(--ice) 100%);
}
.hero-parallax-wrap { position: relative; z-index: 2; }
.hero-parallax-bands {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.parallax-band {
  position: absolute;
  left: -10%;
  right: -10%;
  height: 120px;
  border-radius: 50%;
  opacity: 0.35;
  will-change: transform;
}
.parallax-band--1 {
  top: 8%;
  background: linear-gradient(90deg, transparent, var(--wave-blue), transparent);
  transform: translateY(var(--band-y1, 0));
}
.parallax-band--2 {
  top: 35%;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  transform: translateY(var(--band-y2, 0));
}
.parallax-band--3 {
  bottom: 15%;
  background: linear-gradient(90deg, transparent, var(--coral), transparent);
  opacity: 0.2;
  transform: translateY(var(--band-y3, 0));
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
.hero-grid img {
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(2, 132, 199, 0.15);
}
.hero-tagline { font-size: 1.15rem; color: var(--muted); max-width: 32rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }

/* Diagonal split */
.diagonal-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  align-items: stretch;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.diagonal-split__visual {
  position: relative;
  min-height: 280px;
  background: var(--navy);
}
.diagonal-split__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
}
.diagonal-split__content {
  padding: 3rem 2.5rem;
  background: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.diagonal-split--reverse .diagonal-split__visual { order: 2; }
.diagonal-split--reverse .diagonal-split__content { order: 1; }

/* Pillars */
.pillars {
  background: var(--white);
}
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.pillar-card {
  padding: 2rem 1.5rem;
  background: var(--ice);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}
.pillar-card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
}
.pillar-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--wave-blue), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}
.pillar-card h3 { color: var(--wave-blue); margin-bottom: 0.5rem; }

/* Flow diagram */
.flow-diagram-section {
  background: var(--surface);
  text-align: center;
}
.flow-diagram-section img {
  margin: 0 auto;
  border-radius: var(--radius);
  max-width: 1000px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
}
.flow-diagram-section .section-lead {
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--muted);
}

/* Solutions list */
.solutions-strip { background: var(--white); }
.flow-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: center;
}
.flow-list li {
  padding: 0.6rem 1.25rem;
  background: var(--ice);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-weight: 500;
  transition: background 0.25s, border-color 0.25s;
}
.flow-list li:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}
.flow-list a { color: inherit; }
.flow-list a:hover { color: inherit; }

/* Timeline */
.timeline-section { background: var(--ice); }
.timeline-steps {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
  counter-reset: wave-step;
  padding: 0;
}
.timeline-steps li {
  flex: 1;
  min-width: 140px;
  padding: 1.25rem 1rem;
  background: var(--white);
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  counter-increment: wave-step;
}
.timeline-steps li::before {
  content: counter(wave-step);
  display: block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  margin: 0 auto 0.75rem;
  border-radius: 50%;
  background: var(--wave-blue);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
}
.timeline-steps strong {
  display: block;
  font-family: var(--font-display);
  margin-bottom: 0.35rem;
}

/* Fluid service rows */
.fluid-rows { background: var(--white); }
.fluid-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}
.fluid-row:last-child { border-bottom: none; }
.fluid-row:nth-child(even) { direction: rtl; }
.fluid-row:nth-child(even) > * { direction: ltr; }
.fluid-row img { border-radius: var(--radius); }
.fluid-row h3 { color: var(--wave-blue); }
.fluid-row p:last-child { margin-bottom: 0; }

/* FAQ */
.faq-section { background: var(--surface); }
.faq-accordion details {
  padding: 1.15rem 1.25rem;
  margin-bottom: 0.65rem;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.faq-accordion summary {
  font-family: var(--font-display);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-accordion summary::-webkit-details-marker { display: none; }
.faq-accordion summary::after {
  content: "+";
  color: var(--teal);
  font-size: 1.25rem;
  font-weight: 700;
}
.faq-accordion details[open] summary::after { content: "−"; }
.faq-accordion details p {
  margin-top: 0.75rem;
  color: var(--muted);
  margin-bottom: 0;
}

/* CTA */
.cta-wave {
  text-align: center;
  background: linear-gradient(135deg, var(--navy) 0%, #1e3a5f 100%);
  color: #fff;
  padding: 4.5rem 0;
}
.cta-wave h2 { color: #fff; }
.cta-wave p { color: rgba(255, 255, 255, 0.85); max-width: 520px; margin: 0 auto 1.5rem; }
.inline-email {
  text-align: center;
  padding: 2rem 0 3rem;
  background: var(--ice);
}
.inline-email a { font-weight: 600; font-size: 1.1rem; }

/* Page hero */
.page-hero {
  padding: 3.5rem 0 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--surface), var(--ice));
}
.page-hero p { color: var(--muted); max-width: 560px; margin-inline: auto; }

/* Collection wave cards */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
}
.filter-btn {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--navy);
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.25s;
}
.filter-btn.active,
.filter-btn:hover {
  background: var(--wave-blue);
  color: #fff;
  border-color: var(--wave-blue);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}
.wave-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color 0.35s, box-shadow 0.35s, transform 0.35s;
  position: relative;
}
.wave-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--wave-blue), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--flow-dur) ease;
}
.wave-card:hover {
  border-color: var(--teal);
  box-shadow: 0 12px 32px rgba(2, 132, 199, 0.12);
  transform: translateY(-4px);
}
.wave-card:hover::before { transform: scaleX(1); }
.wave-card img { width: 100%; height: 200px; object-fit: cover; }
.wave-card-body { padding: 1.35rem; }
.product-cat {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--teal);
  font-weight: 700;
}
.product-ref { font-size: 0.85rem; color: var(--muted); margin: 0.25rem 0 0.5rem; }
.product-meta {
  list-style: none;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0.75rem 0;
}
.product-meta li { margin-bottom: 0.25rem; }
.product-price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--wave-blue);
  font-family: var(--font-display);
  margin: 1rem 0;
}

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.service-card {
  padding: 2rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color 0.3s;
}
.service-card:hover { border-color: var(--teal); }
.service-card h3 { color: var(--wave-blue); }

/* About */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
.cert-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.cert-badge {
  padding: 0.5rem 1rem;
  background: var(--ice);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 2.5rem;
}
.contact-info-card {
  padding: 2rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--ice);
  color: var(--navy);
}
.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
  border-color: #ef4444;
}
.field-error {
  display: none;
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}
.field-error.visible { display: block; }
.form-success {
  display: none;
  padding: 2rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--teal);
  opacity: 0;
  transition: opacity 0.5s ease;
}
.form-success.visible {
  display: block;
  opacity: 1;
}

/* Legal */
.legal-page { padding: 3rem 0 4rem; }
.legal-page h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  color: var(--wave-blue);
}
.legal-page ul { margin: 0.5rem 0 1rem 1.25rem; }

/* Footer */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.85);
  padding: 3rem 0 1rem;
  margin-top: 2rem;
}
.site-footer a { color: var(--teal); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #fff;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-bottom {
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.7;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

/* Cookie */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem 1.5rem;
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  z-index: 300;
  flex-wrap: wrap;
}
.cookie-banner a { color: var(--teal); }
.cookie-banner a:hover { color: #fff; }

/* Scroll animations — wave reveal 0.6s */
.slide-up, .fade-in, .wave-reveal {
  opacity: 1;
  transform: none;
  transition: opacity var(--flow-dur) ease, transform var(--flow-dur) ease;
}
html.js .slide-up,
html.js .fade-in,
html.js .wave-reveal {
  opacity: 0;
  transform: translateY(32px);
}
html.js .wave-reveal {
  clip-path: inset(0 0 0 0);
}
html.js .slide-up.visible,
html.js .fade-in.visible,
html.js .wave-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .slide-up, .fade-in, .wave-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .parallax-band { transform: none !important; }
}

@media (max-width: 900px) {
  .hero-grid, .diagonal-split, .about-split, .contact-grid,
  .fluid-row { grid-template-columns: 1fr; }
  .pillars-grid { grid-template-columns: 1fr; }
  .fluid-row:nth-child(even) { direction: ltr; }
  .diagonal-split--reverse .diagonal-split__visual { order: 0; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem 1.25rem;
    background: rgba(240, 249, 255, 0.98);
    border-bottom: 1px solid var(--border);
  }
  .nav-menu.open { display: flex; }
  .header-cta { display: none; }
  .site-header { position: relative; }
  .header-inner { flex-wrap: wrap; position: relative; }
}