/* ── Self-hosted webfonts (no third-party requests) ─────────────────── */
@font-face {
  font-family: 'Saira Condensed';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/saira-condensed-latin-600-normal.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;
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@font-face {
  font-family: 'Saira Condensed';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/saira-condensed-latin-700-normal.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;
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@font-face {
  font-family: 'Saira Condensed';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('../fonts/saira-condensed-latin-800-normal.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;
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@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-latin-400-normal.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;
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@font-face {
  font-family: 'Inter';
  font-style: normal;
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}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
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}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/jetbrains-mono-latin-400-normal.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;
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  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
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}

/* ==========================================================================
   BELLFORT WINDOW FILMS — Design System
   Palette derived directly from the Bellfort logo:
     #177DBD  deep brand blue      (logo chevron, dark edge)
     #2182C5  mid brand blue       (logo chevron, body)
     #7FCFF4  brand highlight cyan (logo chevron, light edge)
     #000000  wordmark black
   --------------------------------------------------------------------------
   1.  Tokens
   2.  Reset & base
   3.  Typography
   4.  Layout primitives
   5.  Header / navigation
   6.  Buttons & links
   7.  Hero + spectral instrument
   8.  Section furniture (eyebrow, measure rail)
   9.  Cards & grids
   10. Series selector + comparison table
   11. Stats, marquee, testimonials
   12. Forms
   13. Footer
   14. Utilities, motion, responsive
   ========================================================================== */

/* 1. TOKENS ============================================================== */
:root {
  /* Brand */
  --blue:        #177DBD;
  --blue-mid:    #2182C5;
  --blue-lift:   #3E96D2;
  --cyan:        #7FCFF4;
  --cyan-soft:   #A9DFF8;

  /* Ink scale (dark surfaces) */
  --ink:         #070A0E;
  --ink-1:       #0C121A;
  --ink-2:       #121C27;
  --ink-3:       #1A2634;
  --ink-line:    rgba(127, 207, 244, .14);
  --ink-line-2:  rgba(255, 255, 255, .07);

  /* Paper scale (light surfaces) */
  --paper:       #F2F6FA;
  --paper-1:     #FFFFFF;
  --paper-2:     #E4ECF3;
  --paper-line:  #D6E2EC;

  /* Text */
  --tx-hi:       #FFFFFF;
  --tx-lo:       #97A6B8;
  --tx-ink:      #0C121A;
  --tx-ink-lo:   #5A6B7D;

  /* Data-only accent: solar / infrared heat. Never used as brand chrome. */
  --solar:       #FF8A3D;
  --solar-deep:  #E2591B;

  /* Type */
  --f-display: 'Saira Condensed', 'Arial Narrow', system-ui, sans-serif;
  --f-body:    'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-data:    'JetBrains Mono', ui-monospace, 'SFMono-Regular', monospace;

  /* Scale */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;
  --sp-9: 96px; --sp-10: 128px;

  --wrap: 1240px;
  --r-sm: 3px;
  --r-md: 6px;
  --r-lg: 12px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  --nav-h: 76px;
}

/* 2. RESET & BASE ======================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink-1);
  color: var(--tx-hi);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

::selection { background: var(--blue); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; top: -60px; left: 16px; z-index: 200;
  background: var(--cyan); color: var(--ink);
  padding: 10px 18px; border-radius: var(--r-md);
  font-weight: 700; font-size: 14px; text-decoration: none;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* 3. TYPOGRAPHY ========================================================== */
h1, h2, h3, h4, h5 {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.01em;
  text-transform: uppercase;
  margin: 0 0 var(--sp-4);
  text-wrap: balance;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.15rem); font-weight: 800; letter-spacing: -.022em; }
h2 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); letter-spacing: -.018em; }
h3 { font-size: clamp(1.4rem, 2.4vw, 1.95rem); letter-spacing: -.012em; }
h4 { font-size: 1.18rem; letter-spacing: .002em; }

/* Emphasis inside display headings = brand gradient, mirroring the logo mark */
h1 em, h2 em, h3 em {
  font-style: normal;
  background: linear-gradient(96deg, var(--blue) 0%, var(--blue-lift) 42%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

.lede {
  font-size: clamp(1.05rem, 1.55vw, 1.24rem);
  line-height: 1.66;
  color: var(--tx-lo);
  max-width: 62ch;
}

.data { font-family: var(--f-data); font-variant-numeric: tabular-nums; }

a { color: var(--cyan); text-decoration-color: rgba(127,207,244,.35); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--cyan); }

/* 4. LAYOUT PRIMITIVES =================================================== */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 40px);
}

.band { position: relative; padding-block: clamp(64px, 9vw, 120px); }
.band--tight { padding-block: clamp(48px, 6vw, 80px); }
.band--dark  { background: var(--ink-1); color: var(--tx-hi); }
.band--deep  { background: var(--ink); color: var(--tx-hi); }
.band--panel { background: var(--ink-2); color: var(--tx-hi); }
.band--paper { background: var(--paper); color: var(--tx-ink); }
.band--paper .lede { color: var(--tx-ink-lo); }
.band--paper h1, .band--paper h2, .band--paper h3, .band--paper h4 { color: var(--tx-ink); }

/* hairline between dark bands */
.band--dark + .band--dark::before,
.band--panel + .band--dark::before,
.band--dark + .band--panel::before {
  content: ''; position: absolute; inset-inline: 0; top: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--ink-line) 22%, var(--ink-line) 78%, transparent);
}

.grid { display: grid; gap: clamp(20px, 2.6vw, 32px); }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(32px, 5vw, 76px); align-items: center; }
.split--wide-left { grid-template-columns: 1.25fr .75fr; }

/* 5. HEADER / NAV ======================================================== */
.topbar {
  background: var(--ink);
  border-bottom: 1px solid var(--ink-line-2);
  font-size: 12.5px;
  color: var(--tx-lo);
}
.topbar__in {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); min-height: 38px;
}
.topbar__list { display: flex; gap: var(--sp-5); list-style: none; margin: 0; padding: 0; }
.topbar__list li { display: flex; align-items: center; gap: 7px; }
.topbar a { color: var(--tx-lo); text-decoration: none; }
.topbar a:hover { color: var(--cyan); }
.topbar__tick {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 0 3px rgba(127,207,244,.16);
  flex: none;
}

.nav {
  position: sticky; top: 0; z-index: 90;
  background: rgba(12, 18, 26, .82);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid var(--ink-line-2);
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.nav.is-stuck { background: rgba(7, 10, 14, .95); border-bottom-color: var(--ink-line); }

.nav__in {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--nav-h); gap: var(--sp-5);
}
.nav__brand { display: flex; align-items: center; flex: none; }
.nav__brand img { width: 176px; height: auto; }

.nav__menu { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav__link {
  display: block; padding: 10px 14px;
  font-family: var(--f-display);
  font-size: 15px; font-weight: 600; letter-spacing: .045em; text-transform: uppercase;
  color: var(--tx-hi); text-decoration: none; border-radius: var(--r-sm);
  position: relative; white-space: nowrap;
  transition: color .2s var(--ease);
}
.nav__link::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transform: scaleX(0); transform-origin: left; transition: transform .28s var(--ease);
}
.nav__link:hover { color: var(--cyan); }
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--cyan); }

/* dropdown */
.nav__item { position: relative; }
.nav__toggle { background: none; border: 0; cursor: pointer; font: inherit; display: flex; align-items: center; gap: 6px; }
.nav__caret { width: 9px; height: 9px; transition: transform .25s var(--ease); flex: none; }
.nav__item.is-open .nav__caret { transform: rotate(180deg); }
.nav__drop {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 268px;
  background: var(--ink-2);
  border: 1px solid var(--ink-line);
  border-radius: var(--r-lg);
  padding: 8px;
  list-style: none; margin: 0;
  box-shadow: 0 22px 50px -14px rgba(0,0,0,.7);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
}
.nav__item.is-open .nav__drop { opacity: 1; visibility: visible; transform: translateY(0); }
.nav__drop a {
  display: block; padding: 11px 13px; border-radius: var(--r-md);
  color: var(--tx-hi); text-decoration: none;
  font-size: 14.5px; font-weight: 600; line-height: 1.3;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.nav__drop a span {
  display: block; font-weight: 400; font-size: 12.5px; color: var(--tx-lo); margin-top: 3px;
  text-transform: none; letter-spacing: 0;
}
.nav__drop a:hover { background: rgba(127,207,244,.08); color: var(--cyan); }

.nav__cta { flex: none; }
.nav__menu > li:last-child { display: none; }   /* mobile-only duplicate CTA */

/* hamburger */
.burger {
  display: none; width: 44px; height: 44px; flex: none;
  background: none; border: 1px solid var(--ink-line); border-radius: var(--r-md);
  cursor: pointer; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.burger span {
  display: block; width: 19px; height: 2px; background: var(--tx-hi); border-radius: 2px;
  transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 6. BUTTONS ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 14px 26px;
  font-family: var(--f-display);
  font-size: 15.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  border-radius: var(--r-md); border: 1px solid transparent;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: transform .2s var(--ease), box-shadow .25s var(--ease),
              background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 15px; height: 15px; flex: none; }

.btn--primary {
  background: linear-gradient(100deg, var(--blue) 0%, var(--blue-lift) 55%, var(--cyan) 130%);
  color: #fff;
  box-shadow: 0 8px 24px -10px rgba(23,125,189,.85);
}
.btn--primary:hover { box-shadow: 0 14px 34px -10px rgba(23,125,189,.95); transform: translateY(-2px); }

.btn--ghost { background: transparent; color: var(--tx-hi); border-color: rgba(255,255,255,.22); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(127,207,244,.06); }

.btn--ink { background: var(--ink-1); color: #fff; }
.btn--ink:hover { background: var(--ink); transform: translateY(-2px); }

.btn--sm { padding: 10px 18px; font-size: 14px; }
.btn--block { width: 100%; }

/* text link with arrow */
.tlink {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-display); font-size: 15px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--cyan); text-decoration: none;
}
.tlink svg { width: 14px; height: 14px; transition: transform .25s var(--ease); }
.tlink:hover svg { transform: translateX(5px); }
.band--paper .tlink { color: var(--blue); }

/* 7. HERO + SPECTRAL INSTRUMENT ========================================== */
.hero {
  position: relative;
  background: var(--ink);
  overflow: hidden;
  padding-block: clamp(56px, 8vw, 104px) clamp(64px, 9vw, 112px);
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(120% 78% at 78% 6%, rgba(23,125,189,.30) 0%, transparent 58%),
    radial-gradient(90% 62% at 12% 96%, rgba(127,207,244,.10) 0%, transparent 60%);
  pointer-events: none;
}
/* faint glazing-bar texture: the subject is glass */
.hero::after {
  content: ''; position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    100deg, transparent 0 62px, rgba(127,207,244,.045) 62px 63px);
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.75), transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.75), transparent 82%);
}
.hero__in { position: relative; z-index: 2; }
.hero__grid { display: grid; grid-template-columns: 1.14fr .86fr; gap: clamp(36px, 5vw, 72px); align-items: center; }

.hero h1 { margin-bottom: var(--sp-5); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-6); }

.hero__proof {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(14px, 1.6vw, 22px);
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--ink-line);
}
.hero__proof div { min-width: 0; }
.hero__proof b {
  display: block; font-family: var(--f-display); font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 800; line-height: 1; color: var(--tx-hi); letter-spacing: -.01em;
}
.hero__proof span {
  display: block; margin-top: 6px; font-size: 12px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--tx-lo); font-weight: 500;
}

/* --- The signature element: spectral response instrument --------------- */
.instrument {
  background: linear-gradient(180deg, var(--ink-2), #0E1620);
  border: 1px solid var(--ink-line);
  border-radius: var(--r-lg);
  padding: clamp(18px, 2.4vw, 26px);
  box-shadow: 0 34px 70px -30px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.045);
}
.instrument__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--sp-4); margin-bottom: var(--sp-5);
}
.instrument__title {
  font-family: var(--f-display); text-transform: uppercase; letter-spacing: .09em;
  font-size: 13px; font-weight: 700; color: var(--tx-hi); margin: 0;
}
.instrument__sub {
  font-family: var(--f-data); font-size: 11px; color: var(--tx-lo);
  letter-spacing: .02em; margin: 5px 0 0;
}
.instrument__live {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--f-data); font-size: 10.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--cyan);
  border: 1px solid var(--ink-line); border-radius: 100px; padding: 5px 11px;
  flex: none;
}
.instrument__live i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--cyan);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.7); } }

.instrument__chart { width: 100%; height: auto; display: block; }

.instrument__legend {
  display: flex; flex-wrap: wrap; gap: var(--sp-4) var(--sp-5);
  margin-top: var(--sp-4); padding-top: var(--sp-4);
  border-top: 1px solid var(--ink-line-2);
}
.instrument__legend div {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--f-data); font-size: 11px; color: var(--tx-lo); letter-spacing: .02em;
}
.instrument__legend i { width: 14px; height: 3px; border-radius: 2px; flex: none; }

.instrument__tabs { display: flex; gap: 6px; margin-bottom: var(--sp-4); flex-wrap: wrap; }
.chip {
  background: rgba(255,255,255,.04); border: 1px solid var(--ink-line-2);
  color: var(--tx-lo); border-radius: 100px; cursor: pointer;
  padding: 7px 14px;
  font-family: var(--f-display); font-size: 13px; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  transition: all .22s var(--ease);
}
.chip:hover { color: var(--tx-hi); border-color: var(--ink-line); }
.chip[aria-selected="true"] {
  background: linear-gradient(100deg, var(--blue), var(--blue-lift));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 18px -8px rgba(23,125,189,.9);
}

.instrument__readout {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  margin-top: var(--sp-4);
  background: var(--ink-line-2); border: 1px solid var(--ink-line-2);
  border-radius: var(--r-md); overflow: hidden;
}
.readout { background: var(--ink-2); padding: 13px 14px; }
.readout b {
  display: block; font-family: var(--f-display); font-size: 1.7rem; font-weight: 800;
  line-height: 1; color: var(--cyan); letter-spacing: -.01em;
}
.readout span {
  display: block; margin-top: 6px; font-family: var(--f-data);
  font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--tx-lo);
}

/* 8. SECTION FURNITURE =================================================== */
.eyebrow {
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--f-data); font-size: 11.5px; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: var(--sp-4);
}
.eyebrow::before {
  content: ''; width: 26px; height: 1px; flex: none;
  background: linear-gradient(90deg, transparent, var(--cyan));
}
.band--paper .eyebrow { color: var(--blue); }
.band--paper .eyebrow::before { background: linear-gradient(90deg, transparent, var(--blue)); }

.shead { max-width: 66ch; margin-bottom: clamp(36px, 4.4vw, 60px); }
.shead--center { margin-inline: auto; text-align: center; }
.shead--center .eyebrow { justify-content: center; }
.shead--center .lede { margin-inline: auto; }

/* measure rail: a spectrometer-style tick scale used as a structural divider */
.rail {
  display: flex; align-items: stretch; height: 26px; overflow: hidden;
  border-top: 1px solid var(--ink-line-2);
  margin-bottom: clamp(36px, 4.4vw, 56px);
}
.rail i {
  flex: 1; border-left: 1px solid var(--ink-line-2); position: relative;
}
.rail i:first-child { border-left: 0; }
.rail i::before {
  content: attr(data-t); position: absolute; top: 7px; left: 9px;
  font-family: var(--f-data); font-size: 10px; letter-spacing: .09em;
  color: var(--tx-lo); text-transform: uppercase; white-space: nowrap;
}
.band--paper .rail { border-top-color: var(--paper-line); }
.band--paper .rail i { border-left-color: var(--paper-line); }
.band--paper .rail i::before { color: var(--tx-ink-lo); }

/* 9. CARDS & GRIDS ======================================================= */
.card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--ink-line-2);
  border-radius: var(--r-lg);
  padding: clamp(22px, 2.6vw, 32px);
  transition: transform .35s var(--ease-out), border-color .3s var(--ease), box-shadow .35s var(--ease-out);
  overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transform: scaleX(0); transform-origin: left;
  transition: transform .45s var(--ease-out);
}
.card:hover { transform: translateY(-5px); border-color: var(--ink-line); box-shadow: 0 26px 50px -26px rgba(0,0,0,.85); }
.card:hover::before { transform: scaleX(1); }
.card h3 { margin-bottom: var(--sp-3); }
.card p { color: var(--tx-lo); font-size: 15px; margin-bottom: var(--sp-4); }
.card p:last-child { margin-bottom: 0; }

.band--paper .card { background: var(--paper-1); border-color: var(--paper-line); }
.band--paper .card p { color: var(--tx-ink-lo); }
.band--paper .card:hover { box-shadow: 0 26px 50px -28px rgba(12,18,26,.28); border-color: #BFD4E4; }

/* product card with SVG art panel */
.pcard { display: flex; flex-direction: column; padding: 0; }
.pcard__art {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  background: linear-gradient(150deg, var(--ink-3), var(--ink));
  border-bottom: 1px solid var(--ink-line-2);
}
.pcard__art svg { width: 100%; height: 100%; display: block; }
.pcard__body { padding: clamp(20px, 2.4vw, 28px); display: flex; flex-direction: column; flex: 1; }
.pcard__body p { flex: 1; }
.pcard__tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-family: var(--f-data); font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  background: rgba(7,10,14,.7); backdrop-filter: blur(6px);
  border: 1px solid var(--ink-line); color: var(--cyan);
  padding: 5px 10px; border-radius: 100px;
}
.band--paper .pcard__art { border-bottom-color: var(--paper-line); }

/* icon feature */
.feat { display: flex; gap: var(--sp-4); align-items: flex-start; }
.feat__ico {
  flex: none; width: 46px; height: 46px; border-radius: var(--r-md);
  display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(23,125,189,.22), rgba(127,207,244,.10));
  border: 1px solid var(--ink-line);
  color: var(--cyan);
}
.feat__ico svg { width: 21px; height: 21px; }
/* In 4-up grids the columns are too narrow for a side-by-side icon */
.g-4 .feat { flex-direction: column; gap: var(--sp-3); }
.feat h4 { margin-bottom: 6px; }
.feat p { color: var(--tx-lo); font-size: 14.5px; margin: 0; }
.band--paper .feat p { color: var(--tx-ink-lo); }
.band--paper .feat__ico {
  background: linear-gradient(140deg, rgba(23,125,189,.12), rgba(127,207,244,.14));
  border-color: #C6DCEB; color: var(--blue);
}

/* numbered process — used ONLY where order genuinely matters (installation) */
.step { position: relative; padding-left: 62px; }
.step__n {
  position: absolute; left: 0; top: 0;
  font-family: var(--f-display); font-size: 2.1rem; font-weight: 800; line-height: .9;
  color: transparent; -webkit-text-stroke: 1.4px var(--blue-lift);
}
.step h4 { margin-bottom: 6px; }
.step p { color: var(--tx-lo); font-size: 14.5px; margin: 0; }
.band--paper .step p { color: var(--tx-ink-lo); }

/* 10. SERIES SELECTOR + COMPARISON TABLE ================================= */
.series { display: grid; grid-template-columns: 268px 1fr; gap: clamp(24px, 3vw, 44px); align-items: start; }
.series__nav { display: flex; flex-direction: column; gap: 6px; position: sticky; top: calc(var(--nav-h) + 20px); }
.series__btn {
  text-align: left; cursor: pointer; width: 100%;
  background: transparent; border: 1px solid var(--ink-line-2);
  border-radius: var(--r-md); padding: 15px 17px; color: var(--tx-lo);
  transition: all .25s var(--ease); position: relative; overflow: hidden;
}
.series__btn strong {
  display: block; font-family: var(--f-display); font-size: 1.12rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .02em; color: var(--tx-hi);
}
.series__btn span { display: block; font-family: var(--f-data); font-size: 11px; letter-spacing: .06em; margin-top: 4px; }
.series__btn:hover { border-color: var(--ink-line); background: rgba(127,207,244,.04); }
.series__btn[aria-selected="true"] {
  border-color: transparent;
  background: linear-gradient(100deg, rgba(23,125,189,.30), rgba(127,207,244,.10));
  color: var(--cyan);
}
.series__btn[aria-selected="true"]::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
}
.band--paper .series__btn { border-color: var(--paper-line); color: var(--tx-ink-lo); }
.band--paper .series__btn strong { color: var(--tx-ink); }
.band--paper .series__btn[aria-selected="true"] { color: var(--blue); background: linear-gradient(100deg, rgba(23,125,189,.12), rgba(127,207,244,.14)); }

.series__panel { min-height: 320px; }
.series__panel[hidden] { display: none; }

/* 3R meters */
.meters { display: grid; gap: var(--sp-4); margin-top: var(--sp-5); }
.meter__top {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--sp-3);
  margin-bottom: 9px;
}
.meter__label {
  font-family: var(--f-display); font-size: 14px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
}
.meter__val { font-family: var(--f-data); font-size: 15px; font-weight: 500; color: var(--cyan); }
.band--paper .meter__val { color: var(--blue); }
.meter__track {
  height: 7px; border-radius: 100px; overflow: hidden;
  background: rgba(255,255,255,.07);
}
.band--paper .meter__track { background: var(--paper-2); }
.meter__fill {
  height: 100%; border-radius: 100px; width: 0;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transition: width 1.1s var(--ease-out);
}

/* lazy comparison table */
.ctable-shell { position: relative; min-height: 220px; }
.ctable-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--r-lg); }
.ctable {
  width: 100%; border-collapse: collapse; min-width: 720px;
  font-size: 14.5px; background: var(--ink-2);
  border: 1px solid var(--ink-line-2); border-radius: var(--r-lg); overflow: hidden;
}
.ctable caption {
  caption-side: top; text-align: left; padding-bottom: var(--sp-3);
  font-family: var(--f-data); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--tx-lo);
}
.ctable th, .ctable td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--ink-line-2); }
.ctable thead th {
  font-family: var(--f-display); font-size: 14px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--tx-hi);
  background: rgba(255,255,255,.03); white-space: nowrap;
}
.ctable tbody th {
  font-family: var(--f-body); font-size: 14px; font-weight: 600;
  color: var(--tx-hi); white-space: nowrap;
}
.ctable td { font-family: var(--f-data); color: var(--tx-lo); font-variant-numeric: tabular-nums; }
.ctable tbody tr:last-child th, .ctable tbody tr:last-child td { border-bottom: 0; }
.ctable tbody tr { transition: background .2s var(--ease); }
.ctable tbody tr:hover { background: rgba(127,207,244,.04); }
.ctable .is-best { color: var(--cyan); font-weight: 500; }

.band--paper .ctable { background: var(--paper-1); border-color: var(--paper-line); }
.band--paper .ctable th, .band--paper .ctable td { border-bottom-color: var(--paper-line); }
.band--paper .ctable thead th { background: var(--paper-2); color: var(--tx-ink); }
.band--paper .ctable tbody th { color: var(--tx-ink); }
.band--paper .ctable td { color: var(--tx-ink-lo); }
.band--paper .ctable .is-best { color: var(--blue); }
.band--paper .ctable tbody tr:hover { background: rgba(23,125,189,.05); }

.ctable-skeleton { display: grid; gap: 10px; }
.ctable-skeleton i {
  display: block; height: 44px; border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(255,255,255,.04) 25%, rgba(255,255,255,.09) 37%, rgba(255,255,255,.04) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }
.ctable-note {
  margin-top: var(--sp-3); font-family: var(--f-data); font-size: 11px;
  color: var(--tx-lo); line-height: 1.6; max-width: 92ch;
}
.band--paper .ctable-note { color: var(--tx-ink-lo); }

/* 11. STATS / MARQUEE / TESTIMONIALS ===================================== */
.stat { text-align: left; }
.stat b {
  display: block; font-family: var(--f-display);
  font-size: clamp(2.6rem, 5.4vw, 4.2rem); font-weight: 800; line-height: .95;
  letter-spacing: -.02em;
  background: linear-gradient(120deg, #fff 12%, var(--cyan) 96%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.band--paper .stat b { background: linear-gradient(120deg, var(--ink-1) 12%, var(--blue) 96%); -webkit-background-clip: text; background-clip: text; }
.stat span {
  display: block; margin-top: 10px; font-family: var(--f-data);
  font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--tx-lo);
}
.band--paper .stat span { color: var(--tx-ink-lo); }

.marquee { overflow: hidden; position: relative; padding-block: var(--sp-4); }
.marquee::before, .marquee::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 90px; z-index: 2; pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, var(--paper), transparent); }
.marquee::after  { right: 0; background: linear-gradient(270deg, var(--paper), transparent); }
.marquee__track { display: flex; gap: clamp(36px, 5vw, 72px); width: max-content; animation: slide 34s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }
.marquee__item {
  font-family: var(--f-display); font-size: 1.28rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: #98AABC;
  white-space: nowrap; display: flex; align-items: center; gap: 12px;
  transition: color .25s var(--ease);
}
.marquee__item:hover { color: var(--blue); }
.marquee__item::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; opacity: .5; }

.quote {
  background: var(--ink-2); border: 1px solid var(--ink-line-2);
  border-radius: var(--r-lg); padding: clamp(24px, 2.8vw, 32px);
  display: flex; flex-direction: column; gap: var(--sp-4);
  transition: border-color .3s var(--ease), transform .35s var(--ease-out);
}
.quote:hover { border-color: var(--ink-line); transform: translateY(-4px); }
.quote__mark { color: var(--blue-lift); width: 26px; height: 26px; flex: none; opacity: .85; }
.quote p { font-size: 15.5px; line-height: 1.72; color: var(--tx-hi); flex: 1; margin: 0; }
.quote__by { display: flex; align-items: center; gap: 13px; padding-top: var(--sp-4); border-top: 1px solid var(--ink-line-2); }
.quote__av {
  width: 42px; height: 42px; border-radius: 50%; flex: none;
  display: grid; place-items: center;
  font-family: var(--f-display); font-weight: 800; font-size: 16px; color: #fff;
  background: linear-gradient(140deg, var(--blue), var(--cyan));
}
.quote__by b { display: block; font-size: 14.5px; font-weight: 600; color: var(--tx-hi); }
.quote__by span { display: block; font-family: var(--f-data); font-size: 11px; color: var(--tx-lo); letter-spacing: .05em; }

.band--paper .quote { background: var(--paper-1); border-color: var(--paper-line); }
.band--paper .quote p, .band--paper .quote__by b { color: var(--tx-ink); }
.band--paper .quote__by span { color: var(--tx-ink-lo); }

/* CTA band */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(115deg, #0A1622 0%, #10314B 48%, #12547F 100%);
  border-radius: var(--r-lg);
  padding: clamp(34px, 5vw, 66px);
}
.cta-band::before {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(102deg, transparent 0 54px, rgba(127,207,244,.06) 54px 56px);
  pointer-events: none;
}
.cta-band__in { position: relative; z-index: 2; display: grid; grid-template-columns: 1.4fr .6fr; gap: var(--sp-6); align-items: center; }
.cta-band h2 { margin-bottom: var(--sp-3); }
.cta-band p { color: #C6DAEA; margin: 0; max-width: 56ch; }
.cta-band__act { display: flex; flex-direction: column; gap: var(--sp-3); }

/* 12. FORMS ============================================================== */
.form { display: grid; gap: var(--sp-4); }
.field { display: grid; gap: 7px; }
.field label {
  font-family: var(--f-display); font-size: 13px; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase; color: var(--tx-hi);
}
.band--paper .field label { color: var(--tx-ink); }
.field input, .field select, .field textarea {
  font-family: var(--f-body); font-size: 15px;
  background: var(--ink-2); border: 1px solid var(--ink-line-2);
  color: var(--tx-hi); border-radius: var(--r-md); padding: 13px 15px;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
  width: 100%;
}
.band--paper .field input, .band--paper .field select, .band--paper .field textarea {
  background: var(--paper-1); border-color: var(--paper-line); color: var(--tx-ink);
}
.field input::placeholder, .field textarea::placeholder { color: #5D6E80; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-lift); box-shadow: 0 0 0 3px rgba(23,125,189,.22);
}
.field textarea { resize: vertical; min-height: 128px; }
.field__hint { font-family: var(--f-data); font-size: 11px; color: var(--tx-lo); }
.band--paper .field__hint { color: var(--tx-ink-lo); }
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }

.form__status {
  border-radius: var(--r-md); padding: 13px 16px; font-size: 14.5px;
  border: 1px solid var(--ink-line); background: rgba(23,125,189,.10); color: var(--cyan);
}
.form__status[hidden] { display: none; }

/* 13. FOOTER ============================================================= */
.foot { background: var(--ink); border-top: 1px solid var(--ink-line-2); padding-block: clamp(48px, 6vw, 76px) 0; }
.foot__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.35fr; gap: clamp(28px, 3.4vw, 52px); }
.foot__logo { width: 190px; margin-bottom: var(--sp-4); }
.foot p { color: var(--tx-lo); font-size: 14.5px; }
.foot h5 {
  font-family: var(--f-display); font-size: 14px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--tx-hi);
  margin: 0 0 var(--sp-4);
}
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.foot ul a { color: var(--tx-lo); text-decoration: none; font-size: 14.5px; transition: color .2s var(--ease); }
.foot ul a:hover { color: var(--cyan); }
.foot__bottom {
  margin-top: clamp(36px, 4vw, 56px); padding-block: var(--sp-5);
  border-top: 1px solid var(--ink-line-2);
  display: flex; flex-wrap: wrap; gap: var(--sp-4); align-items: center; justify-content: space-between;
}
.foot__bottom p { margin: 0; font-family: var(--f-data); font-size: 12px; }
.foot__social { display: flex; gap: 9px; }
.foot__social a {
  width: 38px; height: 38px; border-radius: var(--r-md); display: grid; place-items: center;
  border: 1px solid var(--ink-line-2); color: var(--tx-lo);
  transition: all .22s var(--ease);
}
.foot__social a:hover { color: var(--cyan); border-color: var(--cyan); background: rgba(127,207,244,.07); transform: translateY(-2px); }
.foot__social svg { width: 16px; height: 16px; }

/* breadcrumb */
.crumbs { padding-block: var(--sp-4); font-family: var(--f-data); font-size: 12px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; align-items: center; }
.crumbs a { color: var(--tx-lo); text-decoration: none; }
.crumbs a:hover { color: var(--cyan); }
.crumbs li[aria-current] { color: var(--cyan); }
.crumbs li + li::before { content: '/'; margin-right: 9px; color: #3B4A5B; }

/* FAQ */
.faq { border-top: 1px solid var(--ink-line-2); }
.faq__item { border-bottom: 1px solid var(--ink-line-2); }
.faq__q {
  width: 100%; background: none; border: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  padding: 22px 0; text-align: left; color: inherit;
  font-family: var(--f-display); font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  font-weight: 700; text-transform: uppercase; letter-spacing: -.005em;
  transition: color .2s var(--ease);
}
.faq__q:hover { color: var(--cyan); }
.faq__ico { flex: none; width: 22px; height: 22px; position: relative; }
.faq__ico::before, .faq__ico::after {
  content: ''; position: absolute; inset: 50% 0 auto 0; height: 2px;
  background: var(--cyan); border-radius: 2px; transition: transform .3s var(--ease);
}
.faq__ico::after { transform: rotate(90deg); }
.faq__q[aria-expanded="true"] .faq__ico::after { transform: rotate(0deg); }
.faq__a { overflow: hidden; height: 0; transition: height .38s var(--ease-out); }
.faq__a > div { padding-bottom: 24px; color: var(--tx-lo); max-width: 76ch; }
.band--paper .faq, .band--paper .faq__item { border-color: var(--paper-line); }
.band--paper .faq__a > div { color: var(--tx-ink-lo); }
.band--paper .faq__q:hover { color: var(--blue); }
.band--paper .faq__ico::before, .band--paper .faq__ico::after { background: var(--blue); }

/* 14. UTILITIES / MOTION / RESPONSIVE ==================================== */
.mt-0 { margin-top: 0; }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.mt-7 { margin-top: var(--sp-7); }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal[data-d="1"].is-in { transition-delay: .08s; }
.reveal[data-d="2"].is-in { transition-delay: .16s; }
.reveal[data-d="3"].is-in { transition-delay: .24s; }

@media (max-width: 1080px) {
  .foot__grid { grid-template-columns: 1fr 1fr; }
  .series { grid-template-columns: 1fr; }
  .series__nav { position: static; flex-direction: row; overflow-x: auto; padding-bottom: 4px; }
  .series__nav .series__btn { min-width: 176px; }
}

@media (max-width: 980px) {
  :root { --nav-h: 68px; }
  .burger { display: flex; }
  .nav__cta { display: none; }
  .nav__menu {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ink); border-bottom: 1px solid var(--ink-line);
    padding: var(--sp-4) clamp(20px, 5vw, 40px) var(--sp-6);
    max-height: calc(100dvh - var(--nav-h)); overflow-y: auto;
    transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
  }
  .nav__menu.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__link { padding: 15px 0; font-size: 19px; border-bottom: 1px solid var(--ink-line-2); border-radius: 0; }
  .nav__link::after { display: none; }
  .nav__toggle { width: 100%; justify-content: space-between; }
  .nav__drop {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; background: transparent; border: 0; padding: 0 0 8px 14px;
    display: none; min-width: 0;
  }
  .nav__item.is-open .nav__drop { display: block; }
  .nav__menu > li:last-child { display: block; }
  .nav__menu .btn { margin-top: var(--sp-4); width: 100%; }
  .hero__grid, .split, .split--wide-left { grid-template-columns: 1fr; }
  .cta-band__in { grid-template-columns: 1fr; }
  .g-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .topbar__in > .topbar__list:first-child { display: none; }
  .topbar__in { justify-content: center; }
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .foot__grid { grid-template-columns: 1fr; }
  .field--row { grid-template-columns: 1fr; }
  .instrument__readout { grid-template-columns: 1fr; }
  .rail i:nth-child(n+4) { display: none; }
  .rail i:nth-child(n+3)::before { display: none; }
  .hero__proof { grid-template-columns: repeat(2, 1fr); gap: var(--sp-5); }
  .btn { width: 100%; }
  .hero__actions .btn, .cta-band__act .btn { width: 100%; }
  .marquee::before, .marquee::after { width: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .nav, .topbar, .foot__social, .btn { display: none !important; }
  body { background: #fff; color: #000; }
}