/* ============ Design Tokens ============ */
:root{
  --bc-navy:#0033a0;
  --bc-navy-deep:#001f5c;
  --bc-navy-ink:#0a1430;
  --bc-navy-mist:#e6ebf5;
  --bc-aqua:#0891b2;
  --bc-aqua-deep:#0e7490;
  --bc-aqua-mist:#e0f2fe;
  --bc-gold:#c9a96a;
  --bc-ink:#0f172a;
  --bc-text:#1e293b;
  --bc-text-soft:#475569;
  --bc-muted:#64748b;
  --bc-line:#e2e8f0;
  --bc-bg:#ffffff;
  --bc-bg-alt:#f8fafc;
  --bc-bg-tint:#f1f5f9;
  --bc-success:#16a34a;
  --bc-warning:#d97706;
  --bc-danger:#dc2626;
  --bc-max:1280px;
  --bc-pad:clamp(16px,4vw,40px);
  --bc-radius:14px;
  --bc-radius-sm:8px;
  --bc-radius-lg:24px;
  --bc-shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.04);
  --bc-shadow:0 4px 12px rgba(15,23,42,.08),0 2px 4px rgba(15,23,42,.04);
  --bc-shadow-lg:0 20px 40px rgba(15,23,42,.12),0 8px 16px rgba(15,23,42,.06);
  --bc-font-display:"Sora","Segoe UI",Verdana,system-ui,sans-serif;
  --bc-font-body:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
}

/* ============ Reset ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--bc-font-body);
  font-size:16px;
  line-height:1.6;
  color:var(--bc-text);
  background:var(--bc-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--bc-navy);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--bc-navy-deep)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid var(--bc-aqua);outline-offset:2px;border-radius:4px}

/* ============ Layout ============ */
.container{max-width:var(--bc-max);margin-inline:auto;padding-inline:var(--bc-pad)}
.section{padding:clamp(48px,7vw,88px) 0}
.section--alt{background:var(--bc-bg-alt)}
.section--tight{padding:clamp(28px,4vw,48px) 0}
.section-head{max-width:1080px;margin-bottom:clamp(32px,4vw,52px)}
.section-head__eyebrow{
  display:inline-block;
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--bc-aqua-deep);
  background:var(--bc-aqua-mist);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:16px;
}
.section-head h2{
  font-family:var(--bc-font-display);
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  line-height:1.15;
  color:var(--bc-navy-ink);
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.section-head p{
  font-size:clamp(15px,1.4vw,18px);
  color:var(--bc-text-soft);
}
.section-head--center{text-align:center;margin-inline:auto}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--bc-line);
}
.site-header__inner{
  max-width:var(--bc-max);margin-inline:auto;
  padding-inline:var(--bc-pad);
  height:68px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--bc-font-display);
  font-weight:800;font-size:18px;
  color:var(--bc-navy-ink);
}
.brand__mark{
  width:36px;height:36px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--bc-navy) 0%,var(--bc-navy-deep) 100%);
  color:#fff;border-radius:8px;
  font-size:14px;font-weight:800;
  letter-spacing:.02em;
}
.nav-menu{
  display:flex;align-items:center;gap:28px;
  font-size:14px;font-weight:500;
}
.nav-menu a{color:var(--bc-text)}
.nav-menu a:hover{color:var(--bc-navy)}
.nav-cta{
  background:var(--bc-navy);color:#fff !important;
  padding:10px 20px;border-radius:999px;
  font-weight:600;
  transition:background .2s ease,transform .2s ease;
}
.nav-cta:hover{background:var(--bc-navy-deep);transform:translateY(-1px)}
.nav-toggle{display:none;font-size:22px;color:var(--bc-navy-ink);padding:6px}

/* ============ Breadcrumbs ============ */
.breadcrumbs{background:var(--bc-bg-tint);border-bottom:1px solid var(--bc-line)}
.breadcrumbs ol{
  max-width:var(--bc-max);margin-inline:auto;
  padding:12px var(--bc-pad);
  display:flex;flex-wrap:wrap;gap:6px;
  font-size:13px;color:var(--bc-muted);
}
.breadcrumbs li::after{content:"/";margin-left:6px;color:var(--bc-line)}
.breadcrumbs li:last-child::after{content:""}
.breadcrumbs a{color:var(--bc-text-soft)}
.breadcrumbs li[aria-current]{color:var(--bc-navy);font-weight:600}

/* ============ Skip link ============ */
.skip-link{
  position:absolute;left:-9999px;top:0;
  background:var(--bc-navy);color:#fff;
  padding:10px 18px;border-radius:0 0 8px 0;z-index:100;
  font-size:14px;font-weight:600;
}
.skip-link:focus{left:0;color:#fff}

/* ============ HERO ============ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(ellipse 60% 80% at 90% 20%, rgba(8,145,178,.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 70% at 0% 80%, rgba(0,51,160,.06) 0%, transparent 60%),
    linear-gradient(180deg,#ffffff 0%,#f8fafc 100%);
  padding:clamp(48px,7vw,84px) 0 clamp(40px,5vw,64px);
}
.hero__grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:clamp(32px,4vw,56px);
  align-items:center;
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--bc-aqua-deep);
  background:var(--bc-aqua-mist);
  padding:8px 16px;border-radius:999px;
  margin-bottom:20px;
}
.hero__eyebrow i{width:14px;height:14px}
.hero h1{
  font-family:var(--bc-font-display);
  font-size:clamp(30px,4.4vw,52px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.025em;
  color:var(--bc-navy-ink);
  margin-bottom:20px;
}
.hero h1 .accent{
  background:linear-gradient(120deg,var(--bc-aqua) 0%,var(--bc-aqua-deep) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--bc-aqua-deep);
}
.hero__lead{
  font-size:clamp(15px,1.3vw,18px);
  color:var(--bc-text-soft);
  margin-bottom:28px;
  max-width:540px;
}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;
  border-radius:999px;
  font-family:var(--bc-font-body);
  font-size:15px;font-weight:600;
  transition:all .2s ease;
  text-align:center;
}
.btn i{width:16px;height:16px}
.btn--primary{background:var(--bc-navy);color:#fff}
.btn--primary:hover{background:var(--bc-navy-deep);transform:translateY(-2px);box-shadow:0 12px 24px rgba(0,51,160,.25);color:#fff}
.btn--ghost{background:transparent;color:var(--bc-navy);border:1.5px solid var(--bc-navy)}
.btn--ghost:hover{background:var(--bc-navy);color:#fff}
.btn--lg{padding:16px 30px;font-size:16px}

.hero__mini-stats{
  display:flex;flex-wrap:wrap;gap:24px;
  padding-top:24px;border-top:1px solid var(--bc-line);
}
.mini-stat{display:flex;flex-direction:column;gap:2px}
.mini-stat__num{
  font-family:var(--bc-font-display);
  font-size:22px;font-weight:800;
  color:var(--bc-navy);
}
.mini-stat__label{font-size:12px;color:var(--bc-muted);text-transform:uppercase;letter-spacing:.06em}

/* ============ HERO VISUAL — Stress Test Triptych ============ */
.stress-stage{
  position:relative;
  background:linear-gradient(160deg,#ffffff 0%,#f1f5f9 100%);
  border-radius:var(--bc-radius-lg);
  padding:28px 22px 24px;
  box-shadow:var(--bc-shadow-lg);
  border:1px solid var(--bc-line);
}
.stress-stage__head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:18px;padding-bottom:14px;
  border-bottom:1px dashed var(--bc-line);
}
.stress-stage__tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--bc-font-display);
  font-size:11px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  color:var(--bc-aqua-deep);
}
.stress-stage__tag i{width:12px;height:12px}
.stress-stage__title{
  font-family:var(--bc-font-display);
  font-size:14px;font-weight:700;color:var(--bc-navy-ink);
}
.stress-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
  margin-bottom:18px;
}
.stress-card{
  position:relative;
  background:#ffffff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  padding:18px 12px 14px;
  text-align:center;
  overflow:hidden;
}
.stress-card__demo{
  position:relative;
  height:96px;
  margin-bottom:12px;
  border-radius:10px;
  overflow:hidden;
}
/* Water test - droplets falling */
.stress-card--water .stress-card__demo{
  background:linear-gradient(180deg,#f8fafc 0%,#e0f2fe 100%);
}
.stress-card--water .drop{
  position:absolute;
  width:8px;height:12px;
  background:linear-gradient(180deg,#bae6fd 0%,#0284c7 100%);
  border-radius:50% 50% 50% 50% / 60% 60% 40% 40%;
  top:-14px;
  filter:drop-shadow(0 1px 2px rgba(2,132,199,.3));
}
.stress-card--water .film{
  position:absolute;left:8%;right:8%;bottom:14px;
  height:34px;
  background:linear-gradient(180deg,#ffffff 0%,#e2e8f0 100%);
  border:1px solid #cbd5e1;
  border-radius:4px;
}
.stress-card--water .bead{
  position:absolute;
  width:10px;height:10px;
  background:radial-gradient(circle at 30% 30%, #ffffff 0%, #bae6fd 70%, #0284c7 100%);
  border-radius:50%;
  bottom:18px;
}
/* Oil test - oily droplets beading */
.stress-card--oil .stress-card__demo{
  background:linear-gradient(180deg,#fffbeb 0%,#fef3c7 100%);
}
.stress-card--oil .oil-drop{
  position:absolute;
  border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #fef9c3 0%, #ca8a04 80%, #713f12 100%);
  box-shadow:inset -2px -3px 4px rgba(0,0,0,.15);
}
.stress-card--oil .film{
  position:absolute;left:8%;right:8%;bottom:14px;
  height:34px;
  background:linear-gradient(180deg,#ffffff 0%,#e2e8f0 100%);
  border:1px solid #cbd5e1;
  border-radius:4px;
}
/* Tear test - force arrows */
.stress-card--tear .stress-card__demo{
  background:linear-gradient(180deg,#f8fafc 0%,#e2e8f0 100%);
  display:flex;align-items:center;justify-content:center;
}
.stress-card--tear .film-strip{
  position:relative;
  width:78%;height:30px;
  background:linear-gradient(180deg,#ffffff 0%,#cbd5e1 100%);
  border:1.5px solid #94a3b8;
  border-radius:4px;
}
.stress-card--tear .arrow{
  position:absolute;
  font-family:var(--bc-font-display);
  font-size:18px;font-weight:800;
  color:var(--bc-danger);
  top:50%;transform:translateY(-50%);
}
.stress-card--tear .arrow--left{left:-4px}
.stress-card--tear .arrow--right{right:-4px}
.stress-card--tear .arrow--left::after{content:"\21A0";margin-left:-4px}
.stress-card--tear .arrow--right::before{content:"\21A2";margin-right:-4px}

.stress-card__label{
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:700;
  color:var(--bc-navy-ink);
  margin-bottom:4px;
}
.stress-card__rating{
  display:inline-flex;align-items:center;gap:4px;
  font-size:11px;font-weight:700;
  color:var(--bc-success);
  background:#dcfce7;
  padding:3px 10px;border-radius:999px;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.stress-card__rating i{width:11px;height:11px}

/* Temperature gauge */
.temp-gauge{
  position:relative;
  background:linear-gradient(135deg,#f8fafc 0%,#e2e8f0 100%);
  border-radius:var(--bc-radius);
  padding:14px 16px;
  border:1px solid var(--bc-line);
}
.temp-gauge__head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:10px;
}
.temp-gauge__title{
  font-family:var(--bc-font-display);
  font-size:11px;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--bc-muted);
}
.temp-gauge__range{
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:700;
  color:var(--bc-navy);
}
.temp-bar{
  position:relative;
  height:10px;
  background:linear-gradient(90deg,#0e7490 0%,#0891b2 18%,#22c55e 50%,#f59e0b 82%,#dc2626 100%);
  border-radius:999px;
  margin-bottom:8px;
}
.temp-bar__zone{
  position:absolute;
  top:-4px;bottom:-4px;
  border:2px solid var(--bc-navy);
  border-radius:4px;
  background:rgba(0,51,160,.08);
}

/* Verdict badge */
.stress-stage__verdict{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-top:14px;padding-top:14px;
  border-top:1px dashed var(--bc-line);
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:700;
  color:var(--bc-navy);
}
.stress-stage__verdict i{width:14px;height:14px;color:var(--bc-success)}

/* ============ Trust Strip ============ */
.trust-strip{
  background:linear-gradient(135deg,var(--bc-navy-ink) 0%,var(--bc-navy-deep) 100%);
  color:#fff;
  padding:24px 0;
}
.trust-strip__grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
}
.trust-item{
  display:flex;align-items:center;gap:12px;
  padding:6px 4px;
}
.trust-item i{
  width:22px;height:22px;
  color:var(--bc-aqua);
  flex-shrink:0;
}
.trust-item__text{
  font-size:13px;font-weight:500;
  line-height:1.35;
}

/* ============ Short Answer ============ */
.short-answer{
  background:#fff;
  border-left:4px solid var(--bc-aqua);
  padding:24px 28px;
  border-radius:0 var(--bc-radius) var(--bc-radius) 0;
  box-shadow:var(--bc-shadow-sm);
  font-size:clamp(15px,1.3vw,18px);
  color:var(--bc-text);
  line-height:1.7;
}
.short-answer strong{color:var(--bc-navy)}

/* ============ Characteristics Cards ============ */
.char-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.char-card{
  background:#fff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  padding:24px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.char-card:hover{transform:translateY(-3px);box-shadow:var(--bc-shadow);border-color:var(--bc-aqua)}
.char-card__icon{
  width:42px;height:42px;
  display:grid;place-items:center;
  background:var(--bc-aqua-mist);
  color:var(--bc-aqua-deep);
  border-radius:10px;
  margin-bottom:14px;
}
.char-card__icon i{width:22px;height:22px}
.char-card h3{
  font-family:var(--bc-font-display);
  font-size:17px;font-weight:700;
  color:var(--bc-navy-ink);
  margin-bottom:8px;
}
.char-card p{
  font-size:14px;color:var(--bc-text-soft);
  line-height:1.55;
}

/* ============ UNIQUE — BOPP Performance Matrix (3-part) ============ */
.matrix{
  background:linear-gradient(160deg,var(--bc-navy-ink) 0%,var(--bc-navy-deep) 55%,#050a20 100%);
  color:#fff;
  padding:clamp(56px,7vw,96px) 0;
  position:relative;
  overflow:hidden;
}
.matrix::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 40% 60% at 80% 20%, rgba(8,145,178,.15) 0%, transparent 60%),
    radial-gradient(ellipse 30% 50% at 10% 90%, rgba(0,51,160,.2) 0%, transparent 60%);
  pointer-events:none;
}
.matrix > *{position:relative;z-index:1}
.matrix .section-head__eyebrow{background:rgba(8,145,178,.2);color:#7dd3fc}
.matrix .section-head h2{color:#fff}
.matrix .section-head p{color:rgba(255,255,255,.75)}

.matrix-part{margin-top:clamp(40px,5vw,64px)}
.matrix-part__head{
  display:flex;align-items:baseline;gap:14px;
  margin-bottom:24px;
  padding-bottom:14px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.matrix-part__num{
  font-family:var(--bc-font-display);
  font-size:42px;font-weight:800;
  color:var(--bc-aqua);
  line-height:1;letter-spacing:-.03em;
}
.matrix-part__label{
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  color:rgba(255,255,255,.6);
  display:block;margin-bottom:4px;
}
.matrix-part__title{
  font-family:var(--bc-font-display);
  font-size:22px;font-weight:700;color:#fff;
}

/* Part 1 — 3 Threats Conquered */
.threats-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.threat-card{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--bc-radius-lg);
  padding:24px;
  backdrop-filter:blur(6px);
}
.threat-card__head{
  display:flex;align-items:center;gap:12px;
  margin-bottom:18px;
}
.threat-card__icon{
  width:44px;height:44px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(8,145,178,.3) 0%,rgba(14,116,144,.3) 100%);
  border:1px solid rgba(125,211,252,.3);
  border-radius:12px;
  color:#7dd3fc;
}
.threat-card__icon i{width:22px;height:22px}
.threat-card__title{
  font-family:var(--bc-font-display);
  font-size:18px;font-weight:700;color:#fff;
}
.threat-card__viz{
  height:80px;
  background:rgba(0,0,0,.2);
  border-radius:10px;
  margin-bottom:14px;
  position:relative;overflow:hidden;
}
/* Water viz */
.threat-card--water .threat-card__viz{background:linear-gradient(180deg,rgba(125,211,252,.1) 0%,rgba(8,145,178,.15) 100%)}
.threat-card--water .tdrop{
  position:absolute;width:6px;height:9px;
  background:linear-gradient(180deg,#bae6fd 0%,#0284c7 100%);
  border-radius:50% 50% 50% 50% / 60% 60% 40% 40%;
  top:-10px;
}
.threat-card--water .tsurface{
  position:absolute;left:10%;right:10%;bottom:12px;height:24px;
  background:rgba(255,255,255,.85);
  border-radius:3px;
  border:1px solid rgba(255,255,255,.4);
}
/* Oil viz */
.threat-card--oil .threat-card__viz{background:linear-gradient(180deg,rgba(254,243,199,.15) 0%,rgba(202,138,4,.2) 100%)}
.threat-card--oil .toil{
  position:absolute;border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #fef9c3 0%, #ca8a04 80%, #713f12 100%);
  box-shadow:inset -1px -2px 3px rgba(0,0,0,.2);
}
.threat-card--oil .tsurface{
  position:absolute;left:10%;right:10%;bottom:12px;height:24px;
  background:rgba(255,255,255,.85);
  border-radius:3px;
  border:1px solid rgba(255,255,255,.4);
}
/* Tear viz */
.threat-card--tear .threat-card__viz{
  background:linear-gradient(180deg,rgba(226,232,240,.1) 0%,rgba(148,163,184,.15) 100%);
  display:flex;align-items:center;justify-content:center;
}
.threat-card--tear .tstrip{
  position:relative;width:70%;height:22px;
  background:rgba(255,255,255,.8);
  border:1px solid rgba(255,255,255,.5);
  border-radius:3px;
}
.threat-card--tear .tdot{
  position:absolute;width:5px;height:5px;border-radius:50%;
  background:var(--bc-danger);top:50%;transform:translateY(-50%);
}
.threat-card--tear .tdot--l{left:-2px}
.threat-card--tear .tdot--r{right:-2px}

.threat-card__metric{
  display:flex;align-items:baseline;gap:8px;
  margin-bottom:8px;
}
.threat-card__metric-num{
  font-family:var(--bc-font-display);
  font-size:32px;font-weight:800;color:#7dd3fc;
  letter-spacing:-.02em;
}
.threat-card__metric-unit{
  font-size:12px;color:rgba(255,255,255,.6);
  text-transform:uppercase;letter-spacing:.08em;font-weight:600;
}
.threat-card p{
  font-size:13px;color:rgba(255,255,255,.75);
  line-height:1.55;
}

/* Part 2 — Operating Envelope */
.envelope-wrap{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--bc-radius-lg);
  padding:28px;
  backdrop-filter:blur(6px);
}
.envelope-track{
  position:relative;
  height:60px;
  background:linear-gradient(90deg,#1e3a8a 0%,#0891b2 18%,#22c55e 50%,#f59e0b 82%,#dc2626 100%);
  border-radius:12px;
  margin:30px 0 50px;
  box-shadow:inset 0 2px 6px rgba(0,0,0,.3);
}
.envelope-zone{
  position:absolute;
  top:-6px;bottom:-6px;
  left:10%;right:20%;
  border:3px solid #7dd3fc;
  border-radius:8px;
  background:rgba(125,211,252,.12);
  box-shadow:0 0 20px rgba(125,211,252,.3);
}
.envelope-zone__label{
  position:absolute;
  top:-32px;left:50%;transform:translateX(-50%);
  font-family:var(--bc-font-display);
  font-size:11px;font-weight:700;
  color:#7dd3fc;
  letter-spacing:.1em;text-transform:uppercase;
  white-space:nowrap;
}
.envelope-ticks{
  display:flex;justify-content:space-between;
  position:relative;
  margin-bottom:28px;
}
.envelope-tick{
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:600;
  color:rgba(255,255,255,.6);
  text-align:center;
}
.envelope-tick strong{
  display:block;
  font-size:14px;color:#fff;margin-bottom:2px;
}
.envelope-zones-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:14px;
}
.envelope-zone-card{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.1);
  border-radius:10px;
  padding:14px;
  text-align:center;
}
.envelope-zone-card--ok{border-color:rgba(34,197,94,.4)}
.envelope-zone-card--no{border-color:rgba(220,38,38,.3);opacity:.7}
.envelope-zone-card__temp{
  font-family:var(--bc-font-display);
  font-size:18px;font-weight:800;color:#fff;
  margin-bottom:4px;
}
.envelope-zone-card__label{
  font-size:11px;color:rgba(255,255,255,.65);
  text-transform:uppercase;letter-spacing:.08em;font-weight:600;
  margin-bottom:6px;
}
.envelope-zone-card__use{font-size:12px;color:rgba(255,255,255,.75);line-height:1.4}
.envelope-zone-card--ok .envelope-zone-card__temp{color:#86efac}
.envelope-zone-card--no .envelope-zone-card__temp{color:#fca5a5}

/* Part 3 — Adhesive Pairings */
.adhesive-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:14px;
}
.adhesive-card{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--bc-radius);
  padding:20px 14px;
  text-align:center;
  transition:transform .2s ease,border-color .2s ease;
}
.adhesive-card:hover{transform:translateY(-3px);border-color:rgba(125,211,252,.4)}
.adhesive-card__num{
  width:36px;height:36px;
  margin:0 auto 12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(8,145,178,.3) 0%,rgba(0,51,160,.3) 100%);
  border:1px solid rgba(125,211,252,.3);
  border-radius:50%;
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:800;color:#7dd3fc;
}
.adhesive-card h4{
  font-family:var(--bc-font-display);
  font-size:14px;font-weight:700;color:#fff;
  margin-bottom:6px;
}
.adhesive-card p{
  font-size:11px;color:rgba(255,255,255,.7);
  line-height:1.45;
}

/* ============ Best Uses Grid ============ */
.uses-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.use-card{
  background:#fff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  padding:22px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.use-card:hover{transform:translateY(-3px);box-shadow:var(--bc-shadow);border-color:var(--bc-aqua)}
.use-card__icon{
  width:38px;height:38px;
  display:grid;place-items:center;
  background:var(--bc-navy-mist);
  color:var(--bc-navy);
  border-radius:10px;
  margin-bottom:12px;
}
.use-card__icon i{width:20px;height:20px}
.use-card h3{
  font-family:var(--bc-font-display);
  font-size:15px;font-weight:700;
  color:var(--bc-navy-ink);
  margin-bottom:6px;
}
.use-card p{font-size:13px;color:var(--bc-text-soft);line-height:1.5}

/* ============ Performance Table ============ */
.table-wrap{
  overflow-x:auto;
  background:#fff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  box-shadow:var(--bc-shadow-sm);
}
.la-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
}
.la-table th,
.la-table td{
  padding:14px 20px;
  text-align:left;
  border-bottom:1px solid var(--bc-line);
}
.la-table thead th{
  background:var(--bc-navy-ink);
  color:#fff;
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:700;
  letter-spacing:.04em;
  border-bottom:0;
}
.la-table tbody tr:nth-child(even){background:var(--bc-bg-alt)}
.la-table tbody tr:hover{background:var(--bc-aqua-mist)}
.la-table td:first-child{font-weight:600;color:var(--bc-navy-ink)}
.la-table td.col-accent{color:var(--bc-success);font-weight:600}
.la-table td.col-no{color:var(--bc-danger);font-weight:600}

/* ============ Finishes Grid ============ */
.finish-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
}
.finish-card{
  background:#fff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  padding:20px;
  text-align:center;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.finish-card:hover{transform:translateY(-3px);box-shadow:var(--bc-shadow);border-color:var(--bc-gold)}
.finish-card__icon{
  width:44px;height:44px;
  margin:0 auto 12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--bc-navy-mist) 0%,var(--bc-aqua-mist) 100%);
  color:var(--bc-navy);
  border-radius:50%;
}
.finish-card__icon i{width:22px;height:22px}
.finish-card h3{
  font-family:var(--bc-font-display);
  font-size:14px;font-weight:700;
  color:var(--bc-navy-ink);
  margin-bottom:6px;
}
.finish-card p{font-size:12px;color:var(--bc-text-soft);line-height:1.45}

/* ============ Decision Guide ============ */
.decision-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}
.decision-row{
  display:grid;
  grid-template-columns:1fr auto;
  gap:16px;align-items:center;
  background:#fff;
  border:1px solid var(--bc-line);
  border-left:4px solid var(--bc-line);
  border-radius:var(--bc-radius);
  padding:16px 20px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.decision-row:hover{transform:translateX(2px);box-shadow:var(--bc-shadow-sm)}
.decision-row--yes{border-left-color:var(--bc-success)}
.decision-row--no{border-left-color:var(--bc-danger)}
.decision-row__need{font-size:14px;color:var(--bc-text);font-weight:500;line-height:1.4}
.decision-row__verdict{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  padding:8px 14px;border-radius:999px;
  letter-spacing:.04em;text-transform:uppercase;
  white-space:nowrap;
}
.decision-row--yes .decision-row__verdict{background:#dcfce7;color:var(--bc-success)}
.decision-row--no .decision-row__verdict{background:#fee2e2;color:var(--bc-danger)}
.decision-row__verdict i{width:13px;height:13px}

/* ============ Honest Limitations ============ */
.limit-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
}
.limit-card{
  background:#fff;
  border:1px solid var(--bc-line);
  border-left:4px solid var(--bc-warning);
  border-radius:var(--bc-radius);
  padding:22px 24px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.limit-card:hover{transform:translateY(-2px);box-shadow:var(--bc-shadow)}
.limit-card__head{
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;
}
.limit-card__head i{width:20px;height:20px;color:var(--bc-warning)}
.limit-card h3{
  font-family:var(--bc-font-display);
  font-size:16px;font-weight:700;
  color:var(--bc-navy-ink);
}
.limit-card p{font-size:14px;color:var(--bc-text-soft);line-height:1.55;margin-bottom:10px}
.limit-card__alt{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;
  color:var(--bc-navy);
  background:var(--bc-navy-mist);
  padding:6px 12px;border-radius:999px;
}
.limit-card__alt i{width:12px;height:12px}

/* ============ Similar Materials ============ */
.similar-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.similar-card{
  background:#fff;
  border:1px solid var(--bc-line);
  border-top:3px solid var(--bc-gold);
  border-radius:var(--bc-radius);
  padding:22px;
  transition:transform .2s ease,box-shadow .2s ease;
  display:flex;flex-direction:column;
}
.similar-card:hover{transform:translateY(-3px);box-shadow:var(--bc-shadow)}
.similar-card__tag{
  display:inline-block;
  font-family:var(--bc-font-display);
  font-size:10px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  color:var(--bc-gold);
  background:rgba(201,169,106,.12);
  padding:4px 10px;border-radius:999px;
  margin-bottom:10px;align-self:flex-start;
}
.similar-card h3{
  font-family:var(--bc-font-display);
  font-size:17px;font-weight:700;
  color:var(--bc-navy-ink);
  margin-bottom:8px;
}
.similar-card p{font-size:13px;color:var(--bc-text-soft);line-height:1.5;margin-bottom:14px;flex:1}
.similar-card__link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--bc-navy);
}
.similar-card__link i{width:14px;height:14px}

/* ============ Why Us Navy Band ============ */
.why-band{
  background:linear-gradient(135deg,var(--bc-navy) 0%,var(--bc-navy-deep) 100%);
  color:#fff;
  padding:clamp(48px,6vw,72px) 0;
}
.why-band__head{text-align:center;margin-bottom:36px}
.why-band__head .section-head__eyebrow{background:rgba(125,211,252,.18);color:#7dd3fc}
.why-band__head h2{color:#fff}
.why-band__head p{color:rgba(255,255,255,.75)}
.why-stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.why-stat{
  text-align:center;
  padding:24px 14px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--bc-radius);
}
.why-stat__num{
  font-family:var(--bc-font-display);
  font-size:clamp(28px,3.4vw,42px);
  font-weight:800;color:#7dd3fc;
  letter-spacing:-.02em;line-height:1;
  margin-bottom:8px;
}
.why-stat__label{
  font-size:13px;color:rgba(255,255,255,.8);
  line-height:1.4;
}

/* ============ Sample Banner ============ */
.sample-banner{
  display:grid;
  grid-template-columns:1fr auto;
  gap:32px;align-items:center;
  background:linear-gradient(135deg,#fffbeb 0%,#fef3c7 100%);
  border:1px solid #fde68a;
  border-radius:var(--bc-radius-lg);
  padding:32px clamp(24px,3vw,40px);
}
.sample-banner__eyebrow{
  display:inline-block;
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  color:#92400e;
  background:rgba(255,255,255,.6);
  padding:6px 12px;border-radius:999px;
  margin-bottom:10px;
}
.sample-banner h2{
  font-family:var(--bc-font-display);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;color:#451a03;
  margin-bottom:8px;letter-spacing:-.01em;
}
.sample-banner p{font-size:15px;color:#78350f;margin-bottom:16px;max-width:540px}
.sample-banner__price{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:20px 28px;
  background:#fff;
  border-radius:var(--bc-radius);
  border:2px solid #fde68a;
  text-align:center;
}
.sample-banner__price strong{
  font-family:var(--bc-font-display);
  font-size:42px;font-weight:800;
  color:#92400e;
  line-height:1;
}
.sample-banner__price span{
  font-size:11px;color:#78350f;
  text-transform:uppercase;letter-spacing:.06em;font-weight:600;
  max-width:140px;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin-inline:auto}
.faq-item{
  background:#fff;
  border:1px solid var(--bc-line);
  border-radius:var(--bc-radius);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item[open]{box-shadow:var(--bc-shadow);border-color:var(--bc-aqua)}
.faq-item__q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  cursor:pointer;
  list-style:none;
  font-family:var(--bc-font-display);
  font-size:15px;font-weight:600;
  color:var(--bc-navy-ink);
}
.faq-item__q::-webkit-details-marker{display:none}
.faq-item__q-icon{
  flex-shrink:0;
  width:24px;height:24px;
  display:grid;place-items:center;
  border:1.5px solid var(--bc-line);
  border-radius:50%;
  transition:transform .2s ease,background .2s ease,color .2s ease;
  color:var(--bc-navy);
}
.faq-item[open] .faq-item__q-icon{transform:rotate(45deg);background:var(--bc-aqua);color:#fff;border-color:var(--bc-aqua)}
.faq-item__a{
  padding:0 22px 20px;
  font-size:14px;color:var(--bc-text-soft);
  line-height:1.65;
}

/* ============ CTA Band ============ */
.cta-band{
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, rgba(8,145,178,.2) 0%, transparent 70%),
    linear-gradient(160deg,var(--bc-navy-ink) 0%,var(--bc-navy-deep) 100%);
  color:#fff;
  text-align:center;
  padding:clamp(56px,7vw,88px) 0;
}
.cta-band__eyebrow{
  display:inline-block;
  font-family:var(--bc-font-display);
  font-size:12px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  color:#7dd3fc;
  background:rgba(125,211,252,.15);
  padding:8px 16px;border-radius:999px;
  margin-bottom:16px;
}
.cta-band h2{
  font-family:var(--bc-font-display);
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;color:#fff;
  margin-bottom:14px;letter-spacing:-.02em;
}
.cta-band p{
  font-size:clamp(15px,1.3vw,18px);
  color:rgba(255,255,255,.8);
  max-width:640px;margin:0 auto 28px;
}
.cta-band__btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cta-band .btn--primary{background:#fff;color:var(--bc-navy)}
.cta-band .btn--primary:hover{background:var(--bc-aqua-mist);color:var(--bc-navy-deep)}
.cta-band .btn--ghost{color:#fff;border-color:rgba(255,255,255,.4)}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.1);color:#fff}

/* ============ Footer ============ */
.site-footer{
  background:var(--bc-navy-ink);
  color:rgba(255,255,255,.7);
  padding:56px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr repeat(4,1fr);
  gap:32px;
  margin-bottom:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-brand .brand__mark{width:32px;height:32px;font-size:13px}
.footer-brand-name{font-family:var(--bc-font-display);font-weight:800;font-size:16px;color:#fff}
.footer-col p{font-size:13px;color:rgba(255,255,255,.6);line-height:1.55}
.footer-col h4{
  font-family:var(--bc-font-display);
  font-size:13px;font-weight:700;color:#fff;
  margin-bottom:12px;letter-spacing:.06em;text-transform:uppercase;
}
.footer-col ul{display:flex;flex-direction:column;gap:6px}
.footer-col a{color:rgba(255,255,255,.65);font-size:13px}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12px;color:rgba(255,255,255,.5);
}

/* ============ Sticky CTA ============ */
.sticky-cta{
  position:fixed;left:50%;bottom:18px;
  transform:translateX(-50%) translateY(120%);
  z-index:60;
  display:flex;gap:8px;
  padding:8px;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border:1px solid var(--bc-line);
  border-radius:999px;
  box-shadow:var(--bc-shadow-lg);
  transition:transform .35s cubic-bezier(.4,0,.2,1),opacity .35s ease;
  opacity:0;pointer-events:none;
}
.sticky-cta.is-visible{transform:translateX(-50%) translateY(0);opacity:1;pointer-events:auto}
.sticky-cta .btn{padding:10px 18px;font-size:13px}

/* ============ Reveal Animation ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .hero__grid{grid-template-columns:1fr;gap:36px}
  .char-grid{grid-template-columns:repeat(2,1fr)}
  .uses-grid,.finish-grid,.similar-grid{grid-template-columns:repeat(2,1fr)}
  .adhesive-grid{grid-template-columns:repeat(3,1fr)}
  .why-stats{grid-template-columns:repeat(2,1fr);gap:14px}
  .trust-strip__grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
}
@media (max-width:768px){
  .nav-menu{
    position:fixed;top:68px;left:0;right:0;
    flex-direction:column;align-items:flex-start;
    background:#fff;padding:18px var(--bc-pad);
    border-bottom:1px solid var(--bc-line);
    transform:translateY(-120%);transition:transform .3s ease;
    box-shadow:var(--bc-shadow);gap:14px;
  }
  .nav-menu.is-open{transform:translateY(0)}
  .nav-toggle{display:block}
  .threats-grid,.envelope-zones-grid{grid-template-columns:1fr}
  .adhesive-grid{grid-template-columns:repeat(2,1fr)}
  .decision-grid,.limit-grid{grid-template-columns:1fr}
  .sample-banner{grid-template-columns:1fr;text-align:center}
  .sample-banner__price{margin:0 auto}
  .matrix-part__head{flex-direction:column;align-items:flex-start;gap:6px}
  .matrix-part__num{font-size:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero__mini-stats{gap:18px}
  .mini-stat__num{font-size:18px}
}
@media (max-width:520px){
  .char-grid,.uses-grid,.finish-grid,.similar-grid,.why-stats,.adhesive-grid{grid-template-columns:1fr}
  .stress-grid{grid-template-columns:1fr}
  .trust-strip__grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero__cta .btn{width:100%}
  .sticky-cta{left:12px;right:12px;transform:translateY(120%);width:auto}
  .sticky-cta.is-visible{transform:translateY(0)}
  .sticky-cta .btn{flex:1}
  .envelope-ticks{font-size:10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    transition-duration:.01ms !important;
  }
  .reveal{opacity:1;transform:none}
}