/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/jetbrains-mono-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/jetbrains-mono-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/assets/fonts/jetbrains-mono-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/manrope-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/manrope-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/manrope-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */

/* cyrillic */

/* greek */

/* vietnamese */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/assets/fonts/manrope-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/poppins-600-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/assets/fonts/poppins-700-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */

/* latin-ext */

/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("/assets/fonts/poppins-800-latin.woff2") format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Arden Perception — underwater vision site system
   Shared across underwater-vision.html, turbid-water-camera.html,
   single-diver-underwater-observation.html */

:root {
  --navy-950: #08132b;
  --navy-900: #0d2050;
  --navy-800: #163471;
  --navy-700: #1e4390;
  --navy-500: #3d6bc9;
  --navy-100: #dce6fb;
  --navy-50: #ebf1ff;
  --violet-500: #7245e3;
  --violet-300: #b6a2f2;
  /* fusion accent: see design system tokens/colors.css */
  --fusion: #00a2c7;
  --fusion-ink: #0b7e9b;
  --fusion-soft: #dff4f9;
  --slate-800: #2a3550;
  --slate-600: #5b71a3;
  --slate-300: #bac6de;
  --slate-100: #eaeff8;
  --white: #ffffff;
  --line: #d8e0ef;
  --line-strong: #c2d0e8;
  --on-dark: #c6d4f3;
  --on-dark-quiet: #9db2e0;
  --radius-card: 16px;
  --radius-panel: 24px;
  --radius-field: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(13,32,80,.06), 0 6px 16px rgba(13,32,80,.06);
  --shadow-md: 0 2px 4px rgba(13,32,80,.08), 0 14px 30px rgba(13,32,80,.10);
  --ease: cubic-bezier(.2,.6,.2,1);
  --inverse: linear-gradient(160deg,#0d2050,#08132b);
  --font-display: Poppins, "Avenir Next", Arial, sans-serif;
  --font-body: Manrope, "Avenir Next", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--slate-800); background: var(--navy-50); font-family: var(--font-body); text-wrap: pretty; }
img { max-width: 100%; }
a { color: var(--navy-700); }
a:hover { color: var(--violet-500); }
:focus-visible { outline: 2px solid var(--violet-500); outline-offset: 2px; }

.wrap { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }

/* ---- header ---- */
.topbar { position: sticky; top: 0; z-index: 20; height: 80px; border-bottom: 1px solid rgba(22,52,113,.12); background: rgba(235,241,255,.9); backdrop-filter: blur(14px); }
.topbar .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand-lockup { display: flex; align-items: center; text-decoration: none; }
.brand-lockup img { display: block; width: 250px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { color: var(--slate-600); text-decoration: none; padding: 8px 0; border-bottom: 2px solid transparent; font-size: .78rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; transition: color 140ms var(--ease); }
.site-nav a:hover { color: var(--navy-800); }
.site-nav a[aria-current="page"] { color: var(--navy-800); border-color: var(--navy-500); }

/* ---- type ---- */
h1, h2, h3 { color: var(--navy-800); font-family: var(--font-display); }
h1 .hl { color: var(--violet-500); }
h1 { max-width: 600px; margin: 16px 0 20px; font-size: clamp(2.6rem, 4.6vw, 4.3rem); line-height: 1.03; letter-spacing: -.028em; }
.eyebrow { margin: 0; color: var(--slate-600); font-size: .69rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.lead { max-width: 540px; margin: 0; color: var(--slate-600); font-size: 1.05rem; line-height: 1.65; }
.num { color: var(--slate-600); font-family: var(--font-mono); font-size: .68rem; font-weight: 500; letter-spacing: .04em; }

/* ---- rhythm ---- */
.hero { padding: 68px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.04fr; gap: 48px; align-items: center; }
.section { padding: 60px 0; }
.section-head { display: grid; grid-template-columns: minmax(0,1fr) 380px; gap: 40px; align-items: end; margin-bottom: 26px; }
.section-head h2 { max-width: 720px; margin: 10px 0 0; font-size: clamp(1.9rem, 3.4vw, 2.85rem); line-height: 1.08; letter-spacing: -.026em; }
.section-head p { margin: 0; color: var(--slate-600); font-size: .92rem; line-height: 1.6; }

/* ---- chips, buttons ---- */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.tag { border: 1px solid var(--line); border-radius: var(--radius-pill); padding: 8px 14px; color: var(--navy-800); background: rgba(255,255,255,.7); font-size: .76rem; font-weight: 600; }
.tag-mono { font-family: var(--font-mono); font-size: .7rem; font-weight: 500; color: var(--slate-600); background: var(--white); }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 22px; border-radius: var(--radius-pill); color: #fff; background: var(--navy-800); text-decoration: none; font-size: .84rem; font-weight: 700; transition: background 140ms var(--ease); }
.btn:hover { background: var(--navy-900); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-light { display: inline-flex; align-items: center; min-height: 48px; padding: 0 26px; border-radius: var(--radius-pill); color: var(--navy-900); background: #fff; text-decoration: none; font-size: .95rem; font-weight: 700; transition: background 140ms var(--ease); }
.btn-light:hover { background: var(--navy-100); color: var(--navy-900); }
.btn-light:active { transform: translateY(1px); }

/* ---- surfaces ---- */
.card { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--white); box-shadow: var(--shadow-sm); transition: box-shadow 220ms var(--ease), transform 220ms var(--ease), border-color 220ms var(--ease); }
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--line-strong); }
.card h3 { margin: 10px 0 6px; font-size: 1.02rem; letter-spacing: -.012em; }
.card p { margin: 0; color: var(--slate-600); font-size: .84rem; line-height: 1.52; }
.panel { padding: 36px; border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--white); box-shadow: var(--shadow-sm); }
.panel-inverse { padding: 36px; border-radius: var(--radius-panel); color: #fff; background: var(--inverse); box-shadow: var(--shadow-sm); }
/* generic eyebrows are muted, not violet: violet means the difficult condition */
.panel-inverse .eyebrow { color: var(--on-dark); }
.panel-inverse h2, .panel-inverse h3 { color: #fff; }
.panel-inverse h2 { margin: 10px 0 14px; font-size: clamp(1.8rem, 3.1vw, 2.6rem); line-height: 1.08; letter-spacing: -.024em; }
.panel-inverse > p { margin: 0; max-width: 640px; color: var(--on-dark); font-size: .92rem; line-height: 1.62; }
.subgrid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-top: 26px; }
.subcard { padding: 18px; border: 1px solid rgba(220,230,251,.18); border-radius: 12px; background: rgba(235,241,255,.06); }
.subcard b { display: block; color: #fff; font-size: .88rem; }
.subcard span { display: block; margin-top: 7px; color: var(--on-dark); font-size: .76rem; line-height: 1.5; }

/* fusion sections: camera + sonar / multi-sensor. cyan, not violet. */
.panel-inverse.fusion { border-left: 3px solid var(--fusion); }
.panel-inverse.fusion .eyebrow { color: var(--fusion); }
.fusion .subcard b { color: var(--fusion); }

/* raw vs. fused comparison: violet = the difficult condition, cyan = what fusion recovers.
   Light surfaces take --fusion-ink; --fusion itself is a dark-surface value. */
.pair-labels span:first-child { color: var(--violet-500); }
.pair-labels span:last-child { color: var(--fusion-ink); }
.pair-labels span::before { content: ""; display: inline-block; width: 5px; height: 5px; margin-right: 6px; border-radius: 999px; background: currentColor; vertical-align: .12em; }
.compare-card figcaption .before { color: var(--violet-500); }
.compare-card figcaption .after { color: var(--fusion-ink); }

.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ---- spec table (shared by both product pages) ---- */
.spec-table { width: 100%; border-collapse: collapse; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--white); box-shadow: var(--shadow-sm); }
.spec-table th, .spec-table td { padding: 15px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); font-size: .88rem; line-height: 1.5; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 34%; color: var(--navy-800); font-weight: 700; background: var(--slate-100); }
.spec-table td { color: var(--slate-800); }
.spec-table td .val { font-family: var(--font-mono); color: var(--navy-800); }
.note { margin: 14px 0 0; color: var(--slate-600); font-size: .78rem; line-height: 1.55; }

/* ---- media ---- */
.media-frame { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--slate-100); }
.media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; overflow: hidden; border-radius: var(--radius-card); border: 1px solid var(--line); background: var(--white); }
.pair img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; }
.pair-labels { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin: 12px 0 0; padding: 0 2px; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .02em; color: var(--slate-600); }

/* ---- contact ---- */
.contact { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 44px; align-items: end; padding: 44px; border-radius: var(--radius-panel); color: #fff; background: var(--inverse); box-shadow: var(--shadow-md); }
.contact .eyebrow { color: var(--on-dark); }
.contact h2 { color: #fff; max-width: 620px; margin: 10px 0 12px; font-size: clamp(1.75rem, 3vw, 2.5rem); line-height: 1.08; letter-spacing: -.024em; }
.contact p { max-width: 560px; margin: 0; color: var(--on-dark); font-size: .92rem; line-height: 1.62; }
.contact-action { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.contact-action small { color: var(--on-dark-quiet); font-size: .74rem; }

/* ---- footer ---- */
footer { margin-top: 60px; background: var(--navy-800); color: var(--navy-100); }
footer .wrap { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 0; font-size: .8rem; }
footer a { color: #fff; text-decoration: none; font-weight: 600; }
footer a:hover { color: var(--violet-300); text-decoration: underline; }

@media (max-width: 980px) {
  .hero-grid, .section-head, .contact { grid-template-columns: 1fr; }
  .section-head { gap: 12px; }
  .contact { gap: 28px; align-items: start; }
  .subgrid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 650px) {
  .wrap { width: min(100% - 32px, 1200px); }
  .topbar { height: 66px; }
  .brand-lockup img { width: 168px; }
  .site-nav { gap: 14px; }
  .site-nav a { font-size: .68rem; letter-spacing: .04em; }
  .site-nav a[aria-current="page"] { display: none; }
  .hero { padding: 44px 0 40px; }
  .section { padding: 44px 0; }
  h1 { font-size: 2.5rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .panel, .panel-inverse, .contact { padding: 26px; }
  .spec-table th, .spec-table td { padding: 13px 14px; font-size: .84rem; }
  .spec-table th { width: 42%; }
  footer .wrap { min-height: 0; flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0s !important; }
}

      
      /* ---- underwater-vision.html ---- */

      .compare { margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--white); box-shadow: var(--shadow-md); }
      .compare-note { margin: 14px 2px 2px; color: var(--slate-600); font-size: .8rem; line-height: 1.55; }
      .product-card { display: flex; flex-direction: column; overflow: hidden; padding: 0; }
      .product-media { position: relative; display: grid; place-items: center; overflow: hidden; background: linear-gradient(145deg,#f9fbff,#dce6fb); }
      .product-media img { width: 88%; height: 300px; object-fit: contain; display: block; }
      .product-media.portable { background: var(--navy-950) url("/assets/images/underwater-background.webp") center / cover no-repeat; isolation: isolate; }
      .product-media.portable::before { content: ""; position: absolute; inset: 0; z-index: 0; background: rgba(8,19,43,.4); }
      .product-media.portable img { position: relative; z-index: 1; filter: drop-shadow(0 24px 22px rgba(0,0,0,.36)); }
      .product-body { display: flex; flex-direction: column; flex: 1; padding: 28px; }
      .product-type { color: var(--slate-600); font-size: .69rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
      .product-card h3 { margin: 10px 0 12px; font-size: clamp(1.45rem, 2.4vw, 2rem); line-height: 1.12; letter-spacing: -.02em; }
      .product-card p { margin: 0; color: var(--slate-600); font-size: .9rem; line-height: 1.6; }
      .product-specs { display: flex; flex-wrap: wrap; gap: 7px; margin: 18px 0 22px; }
      .product-specs span { border: 1px solid var(--line); border-radius: var(--radius-pill); padding: 6px 11px; color: var(--slate-600); font-family: var(--font-mono); font-size: .66rem; }
      .product-card .btn { align-self: flex-start; margin-top: auto; }
      .integration { display: grid; grid-template-columns: .8fr 1.2fr; gap: 18px; align-items: stretch; }
      .integration-photo { min-height: 400px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--white); box-shadow: var(--shadow-sm); }
      .integration-photo img { width: 100%; height: 100%; object-fit: contain; padding: 24px; display: block; }
      
      @media (max-width: 980px) {
        .integration { grid-template-columns: 1fr; }
        .integration-photo { min-height: 0; }
        .integration-photo img { aspect-ratio: 4 / 3; height: auto; max-height: 360px; }
      }
      @media (max-width: 650px) {
        .product-media img { height: 240px; }
        .product-body { padding: 24px; }
      }

      /* ---- turbid-water-camera.html ---- */

      .camera-panel { position: relative; min-height: 380px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-panel); background: linear-gradient(145deg,#f9fbff,#dce6fb); box-shadow: var(--shadow-md); }
      .camera-panel::before, .camera-panel::after { content: ""; position: absolute; border: 1px solid rgba(30,67,144,.16); border-radius: 50%; }
      .camera-panel::before { width: 460px; height: 460px; right: -120px; top: -110px; }
      .camera-panel::after { width: 300px; height: 300px; right: -38px; top: -14px; border-style: dashed; }
      .camera-panel img { position: relative; z-index: 1; width: 92%; height: 320px; object-fit: contain; display: block; }
      .camera-panel figcaption { position: absolute; z-index: 2; left: 24px; bottom: 20px; color: var(--slate-600); font-size: .69rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }

      .page-turbid .spec-split { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
      .config-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
      .config-list li { display: grid; grid-template-columns: 18px 1fr; gap: 12px; color: var(--slate-600); font-size: .88rem; line-height: 1.5; }
      .config-list li::before { content: ""; width: 6px; height: 6px; margin-top: 8px; border-radius: 50%; background: var(--navy-500); }

      .compare-card { margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--white); box-shadow: var(--shadow-sm); }
      .compare-card figcaption { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-top: 12px; padding: 0 2px; color: var(--slate-600); font-size: .78rem; }
      .compare-card figcaption strong { color: var(--navy-800); font-weight: 700; }
      .compare-card figcaption span { font-family: var(--font-mono); font-size: .68rem; }
      .field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 26px; }
      .field-card .media-frame img { aspect-ratio: 3 / 2; }
      .field-card.ours { border-color: var(--navy-500); box-shadow: var(--shadow-md); }

      .rov-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 18px; align-items: stretch; }
      .rov-photo { min-height: 400px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--white); box-shadow: var(--shadow-sm); }
      .rov-photo img { width: 100%; height: 100%; object-fit: contain; padding: 24px; display: block; }
      .rov-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin: 24px 0; }
      .rov-metric { display: flex; flex-direction: column; gap: 7px; padding: 15px; border: 1px solid var(--line); border-radius: var(--radius-field); background: var(--navy-50); }
      .rov-metric b { color: var(--navy-800); font-family: var(--font-mono); font-size: 1.05rem; letter-spacing: -.01em; }
      .rov-metric b.word { font-family: var(--font-body); letter-spacing: -.015em; }
      .rov-metric span { color: var(--slate-600); font-size: .72rem; line-height: 1.4; }
      .payload-label { margin: 20px 0 0; color: var(--navy-800); font-size: .8rem; font-weight: 700; }
      .payload-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
      .payload-row span { border: 1px solid var(--line); border-radius: var(--radius-pill); padding: 6px 11px; color: var(--slate-600); font-family: var(--font-mono); font-size: .66rem; }

      @media (max-width: 980px) {
        .page-turbid .spec-split, .rov-layout, .field-pair { grid-template-columns: 1fr; }
        .rov-photo { min-height: 0; }
        .rov-photo img { aspect-ratio: 4 / 3; height: auto; max-height: 360px; }
        .rov-metrics { grid-template-columns: repeat(3,1fr); }
      }
      @media (max-width: 650px) {
        .camera-panel { min-height: 300px; }
        .camera-panel img { height: 240px; }
        .rov-metrics { grid-template-columns: 1fr; }
      }

      /* ---- single-diver-underwater-observation.html ---- */

      .hero-media { position: relative; margin: 0; min-height: 440px; display: grid; place-items: center; padding: 32px; overflow: hidden; border: 1px solid rgba(198,212,243,.55); border-radius: var(--radius-panel); background: var(--navy-950) url("/assets/images/underwater-background.webp") center / cover no-repeat; box-shadow: var(--shadow-md); isolation: isolate; }
      .hero-media::before { content: ""; position: absolute; inset: 0; z-index: 0; background: rgba(8,19,43,.42); }
      .hero-media img { position: relative; z-index: 1; width: min(100%, 500px); height: 330px; object-fit: contain; display: block; filter: drop-shadow(0 28px 24px rgba(0,0,0,.35)); }
      .hero-media figcaption { position: absolute; z-index: 2; left: 20px; bottom: 20px; right: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
      .capsule { padding: 8px 13px; border-radius: var(--radius-pill); color: #eef3ff; background: rgba(8,19,43,.68); border: 1px solid rgba(198,212,243,.3); font-family: var(--font-mono); font-size: .66rem; letter-spacing: .03em; }

      .solo-contrast { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 26px; }
      .solo-col { padding: 20px; border: 1px solid rgba(220,230,251,.18); border-radius: 12px; background: rgba(235,241,255,.06); }
      .solo-col.now { border-left: 2px solid var(--violet-500); background: rgba(114,69,227,.12); }
      .solo-col > span { display: block; margin-bottom: 14px; color: var(--on-dark-quiet); font-size: .66rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
      .solo-col.now > span { color: var(--violet-300); }
      .solo-col ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 11px; }
      .solo-col li { display: grid; grid-template-columns: 16px 1fr; gap: 10px; color: #e8efff; font-size: .85rem; line-height: 1.5; }
      .solo-col li::before { content: ""; width: 5px; height: 5px; margin-top: 8px; border-radius: 50%; background: rgba(198,212,243,.5); }
      .solo-col.now li::before { background: var(--violet-300); }

      .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
      .step { padding-top: 18px; border-top: 2px solid var(--line-strong); }
      .step h3 { margin: 12px 0 6px; font-size: 1.05rem; letter-spacing: -.015em; }
      .step p { margin: 0; color: var(--slate-600); font-size: .84rem; line-height: 1.52; }
      .workflow-note { margin: 0 0 26px; max-width: 620px; color: var(--slate-600); font-size: .92rem; line-height: 1.6; }

      .page-portable .spec-split { display: grid; grid-template-columns: .82fr 1.18fr; gap: 18px; align-items: start; }
      .page-portable .spec-split .panel-inverse h3 { margin: 10px 0 14px; font-size: 1.45rem; line-height: 1.14; letter-spacing: -.022em; }
      .page-portable .spec-split .panel-inverse p { margin: 0; color: var(--on-dark); font-size: .88rem; line-height: 1.6; }

      @media (max-width: 980px) {
        .workflow { grid-template-columns: 1fr 1fr; }
        .page-portable .spec-split { grid-template-columns: 1fr; }
        .hero-media { min-height: 380px; }
      }
      @media (max-width: 650px) {
        .workflow, .solo-contrast { grid-template-columns: 1fr; }
        .hero-media { min-height: 320px; padding: 20px; }
        .hero-media img { height: 240px; }
      }
    

picture { display: block; }
.pair picture { width: 100%; aspect-ratio: 4 / 3; overflow: hidden; }
.pair picture img { width: 100%; height: 100%; aspect-ratio: auto; object-fit: cover; }
.media-frame picture,
.integration-photo picture,
.rov-photo picture { width: 100%; height: 100%; }
.product-media picture,
.camera-panel picture,
.hero-media picture { width: 100%; }
.product-media picture img,
.camera-panel picture img,
.hero-media picture img { margin-inline: auto; }
.integration-copy > .btn-light { margin-top: 24px; }
.page-rov .camera-panel img { height: 350px; padding: 20px; }
.page-rov .mission-grid { margin-top: 26px; }
.product-media.portable,
.hero-media {
  background-image: image-set(
    url("/assets/images/underwater-background.avif") type("image/avif"),
    url("/assets/images/underwater-background.webp") type("image/webp")
  );
}
@media (max-width: 650px) {
  .site-nav { gap: 10px; }
  .site-nav a { font-size: .62rem; }
}