/* DEEP BLUE d.o.o. — site styles */

:root {
  color-scheme: light;
  --brand: #2889e9;
  --brand-dark: #1a6fc7;
  --navy: #021a44;

  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --card: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.72);
  --link: #0066cc;

  --dark-bg: #000000;
  --dark-text: #f5f5f7;
  --dark-muted: #a1a1a6;

  --radius: 22px;
  --max: 1080px;
  --gutter: 22px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.center { text-align: center; }
.narrow-container { max-width: 760px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter);
  height: 52px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo img { height: 30px; width: auto; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--text); font-size: 13px; opacity: 0.8; }
.nav-links a:hover { opacity: 1; text-decoration: none; }
.nav-toggle {
  display: none; width: 44px; height: 44px; margin-right: -10px;
  border: 0; background: transparent; cursor: pointer; position: relative;
}
.nav-toggle span {
  position: absolute; left: 13px; right: 13px; height: 1.5px; background: var(--text);
  transition: transform .3s ease, top .3s ease;
}
.nav-toggle span:first-child { top: 18px; }
.nav-toggle span:last-child { top: 25px; }
.nav.open .nav-toggle span:first-child { top: 21.5px; transform: rotate(45deg); }
.nav.open .nav-toggle span:last-child { top: 21.5px; transform: rotate(-45deg); }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: 0; padding: 8px var(--gutter) 24px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .nav.open .nav-links { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { font-size: 22px; font-weight: 600; padding: 12px 0; opacity: 1; border-bottom: 1px solid var(--line); }
}

/* Buttons & links */
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 980px;
  font-size: 17px; font-weight: 500; line-height: 1.2;
  transition: background .2s ease, transform .2s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-light { background: #f5f5f7; color: #1d1d1f; }
.btn-light:hover { background: #fff; }
.link-arrow { font-size: 17px; white-space: normal; }
.link-arrow::after { content: " ›"; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin-top: 32px; }
.center .cta-row, .hero .cta-row { justify-content: center; }

.eyebrow {
  display: block; font-size: 14px; font-weight: 600; letter-spacing: 0.02em;
  color: var(--brand); margin-bottom: 10px;
}
.lead { font-size: clamp(19px, 2.2vw, 22px); line-height: 1.4; color: var(--text-muted); margin-top: 18px; }
.lead.narrow { max-width: 680px; margin-left: auto; margin-right: auto; }

/* Hero */
.hero {
  position: relative; overflow: hidden; text-align: center;
  padding: clamp(56px, 10vw, 120px) var(--gutter) clamp(90px, 14vw, 160px);
  background: radial-gradient(120% 80% at 50% 0%, rgba(40,137,233,.10), transparent 60%), var(--bg);
}
.hero-inner { max-width: 820px; margin: 0 auto; position: relative; z-index: 1; }
.hero-mark { width: clamp(120px, 22vw, 190px); margin: 0 auto 28px; animation: float 6s ease-in-out infinite; }
.hero h1 { font-size: clamp(44px, 8vw, 88px); line-height: 1.04; letter-spacing: -0.035em; }
.hero h1 { background: linear-gradient(180deg, var(--text) 30%, var(--brand)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-waves {
  position: absolute; left: -10%; right: -10%; bottom: -1px; height: 120px;
  background:
    radial-gradient(60% 120px at 20% 100%, rgba(40,137,233,.14), transparent 70%),
    radial-gradient(60% 120px at 80% 100%, rgba(2,26,68,.12), transparent 70%);
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* Sections */
.section { padding: clamp(72px, 11vw, 140px) 0; }
.section h2 { font-size: clamp(36px, 6vw, 64px); line-height: 1.06; }
.section-title { font-size: clamp(32px, 5vw, 56px) !important; margin-bottom: 48px; }
.tiles { background: var(--bg-alt); }
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tile {
  display: flex; flex-direction: column; gap: 8px;
  background: var(--card); color: var(--text); padding: 32px 28px; border-radius: var(--radius);
  transition: transform .3s ease, box-shadow .3s ease;
}
.tile:hover { text-decoration: none; transform: translateY(-4px); box-shadow: 0 18px 40px rgba(0,0,0,.08); }
.tile h3 { font-size: 28px; }
.tile p { color: var(--text-muted); flex: 1; }
.tile .link-arrow { color: var(--link); margin-top: 12px; }

.product-light { background: var(--bg); }
.product-dark { background: var(--dark-bg); color: var(--dark-text); }
.product-dark .lead, .product-dark .features li { color: var(--dark-muted); }
.product-dark .features strong { color: var(--dark-text); }
.product-dark .link-arrow { color: #2997ff; }
.product-dark .eyebrow { color: #4aa3ff; }

.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: center; }
.split.reverse .copy { order: 2; }
.split.reverse .visual { order: 1; }
.features { list-style: none; padding: 0; margin: 32px 0 0; display: grid; gap: 18px; }
.features li { color: var(--text-muted); padding-left: 18px; border-left: 2px solid var(--brand); }
.features strong { display: block; color: var(--text); font-weight: 600; }

.visual { display: flex; flex-direction: column; align-items: center; margin: 0; }
.art { width: 100%; height: auto; }
.svg-tag { font: 700 13px var(--font); fill: #7cc0ff; letter-spacing: .06em; }

/* Survey */
.sonar { margin: 56px auto 0; max-width: 900px; }
.sonar .art { border-radius: var(--radius); box-shadow: 0 30px 60px rgba(0,0,0,.18); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 64px; }
#survey .service-grid { grid-template-columns: repeat(2, 1fr); }
.service { background: var(--bg-alt); border-radius: var(--radius); padding: 32px 28px; }
.service h3 { font-size: 22px; margin: 18px 0 8px; }
.service p { color: var(--text-muted); font-size: 16px; }
.icon { width: 48px; height: 48px; border-radius: 12px; background: var(--brand); display: grid; place-items: center; }
.icon svg { width: 30px; height: 30px; fill: none; stroke: #fff; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.partner {
  margin: 20px 0 56px; padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center; justify-content: space-between;
}
.partner p { color: var(--text-muted); max-width: 640px; }
.partner strong { color: var(--text); }

/* DiveIT */
.btn-secondary { background: transparent; color: var(--brand); box-shadow: inset 0 0 0 1.5px var(--brand); }
.btn-secondary:hover { background: rgba(40,137,233,.08); }
.center-row { justify-content: center; }
.cta-row.links { margin-top: 20px; }
.hero-shot { margin: 56px 0 0; }
.hero-shot img { width: 100%; border-radius: var(--radius); box-shadow: 0 30px 60px rgba(2,26,68,.22); }
.stats {
  list-style: none; padding: 0; margin: 28px 0 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border-radius: var(--radius); overflow: hidden;
}
.stats li { background: var(--bg-alt); padding: 24px 20px; text-align: center; }
.stats strong { display: block; font-size: clamp(20px, 2.6vw, 28px); letter-spacing: -0.02em; }
.stats span { font-size: 14px; color: var(--text-muted); }
.housing { margin-top: clamp(64px, 9vw, 110px); }
.product-card { background: #fff; border-radius: var(--radius); padding: 24px; width: 100%; box-shadow: 0 0 0 1px var(--line); }
.product-card img { width: 100%; }
.sub-title { font-size: clamp(28px, 4vw, 40px); line-height: 1.1; }
.sub-title.big { font-size: clamp(32px, 5vw, 52px); }
.specs { margin: 32px 0 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.specs div { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.specs dt { color: var(--text-muted); }
.specs dd { margin: 0; text-align: right; font-weight: 500; }

/* App icons */
.app-icon { width: 88px; height: 88px; border-radius: 22%; margin: 0 auto 22px; box-shadow: 0 10px 30px rgba(2,26,68,.18); }
.app-icon.left { margin-left: 0; }

/* Feature blocks with screenshot galleries */
.feature-block { margin-top: clamp(72px, 10vw, 120px); }
.feature-head { display: grid; grid-template-columns: 1fr 1.4fr; gap: 16px 48px; align-items: end; margin-bottom: 32px; }
.feature-head p { color: var(--text-muted); font-size: 17px; }
.product-dark .feature-head p { color: var(--dark-muted); }
.housing-block { margin-top: clamp(96px, 13vw, 160px); padding-top: clamp(72px, 10vw, 120px); border-top: 1px solid var(--line); }

.gallery {
  --pad: max(var(--gutter), calc((100vw - var(--max)) / 2 + var(--gutter)));
  display: flex; gap: 20px; overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory; scroll-padding-inline: var(--pad);
  padding: 8px var(--pad) 24px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.gallery::-webkit-scrollbar { display: none; }
.gallery:focus-visible { outline: 2px solid var(--brand); outline-offset: -2px; }
.slide { flex: 0 0 auto; margin: 0; scroll-snap-align: start; }
.slide img { display: block; width: 100%; height: auto; }
.slide figcaption { font-size: 15px; color: var(--text-muted); margin-top: 14px; max-width: 520px; }
.slide figcaption strong { color: var(--text); font-weight: 600; }
.product-dark .slide figcaption { color: var(--dark-muted); }
.product-dark .slide figcaption strong { color: var(--dark-text); }

/* Device frames */
.slide.phone { width: min(78vw, 640px); }
.slide.phone img { border: 10px solid #111; border-radius: 34px; background: #000; box-shadow: 0 0 0 1.5px #3a3a3c, 0 20px 50px rgba(0,0,0,.18); }
.slide.tablet { width: min(82vw, 600px); }
.slide.tablet img { border: 14px solid #111; border-radius: 30px; background: #000; box-shadow: 0 0 0 1.5px #3a3a3c, 0 24px 60px rgba(40,137,233,.18); }

.gallery-nav { display: flex; justify-content: flex-end; gap: 12px; }
.gnav {
  width: 40px; height: 40px; border-radius: 50%; border: 0; cursor: pointer;
  font: 400 24px/1 var(--font); color: var(--text); background: var(--bg-alt);
  transition: background .2s ease;
}
.gnav:hover { background: var(--line); }
.product-dark .gnav { background: #1d1d1f; color: var(--dark-text); }
.product-dark .gnav:hover { background: #2c2c2e; }
.features.cols { grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }

/* BlueROV photo */
.photo-card { width: 100%; background: #fff; border-radius: var(--radius); padding: clamp(16px, 4vw, 36px); box-shadow: 0 30px 80px rgba(40,137,233,.35); }
.photo-card img { width: 100%; }
.photo figcaption { font-size: 12px; color: var(--dark-muted); margin-top: 14px; text-align: center; }
.photo figcaption a { color: var(--dark-muted); text-decoration: underline; }

/* Footer */
.footer { background: var(--bg-alt); border-top: 1px solid var(--line); padding: 48px 0 calc(40px + env(safe-area-inset-bottom)); }
.footer-inner { display: flex; flex-direction: column; gap: 18px; }
.footer-logo { width: 180px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 24px; font-size: 14px; }
.legal { font-size: 12px; color: var(--text-muted); }
.legal.small { font-size: 11px; opacity: .8; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-mark { animation: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 48px; }
  .split.reverse .copy, .split .copy { order: 1; }
  .split.reverse .visual, .split .visual { order: 2; }
  .tile-grid, .service-grid, #survey .service-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .feature-head { grid-template-columns: 1fr; }
  .features.cols { grid-template-columns: 1fr; }
  .split.housing .visual { order: 2; }
  .section-title { margin-bottom: 32px; }
}
@media (max-width: 480px) {
  :root { --gutter: 16px; }
  .btn { width: 100%; text-align: center; }
  .cta-row { gap: 16px; }
  .cta-row .link-arrow { width: 100%; text-align: center; }
  .split .copy { text-align: left; }
  .slide.phone img { border-width: 6px; border-radius: 22px; }
  .slide.tablet img { border-width: 8px; border-radius: 20px; }
  .gallery { gap: 14px; }
  .stats li { padding: 18px 12px; }
  .product-card { padding: 14px; }
  .partner { padding: 22px; }
}