:root {
  --navy: #061d31;
  --navy-2: #0a314f;
  --blue: #087db8;
  --blue-dark: #005d91;
  --cyan: #75d4f3;
  --lime: #b8e46a;
  --ink: #102a3e;
  --muted: #5c7182;
  --paper: #eff4f7;
  --line: #d4e1e8;
  --white: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 Arial, Helvetica, sans-serif; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
[hidden] { display: none !important; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; transform: translateY(-160%); padding: 10px 14px; background: #fff; color: var(--navy); }
.skip-link:focus { transform: none; }

.concept-ribbon { display: flex; justify-content: center; gap: 24px; padding: 7px 18px; background: var(--lime); color: #173407; font-size: 10px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.site-header { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; min-height: 92px; padding: 18px max(28px, calc((100vw - 1240px) / 2)); background: #fff; border-bottom: 1px solid var(--line); }
.site-header a { text-decoration: none; font-size: 13px; font-weight: 850; }
.back-link { justify-self: start; }
.sales-link { justify-self: end; padding: 11px 16px; border-radius: 4px; background: var(--blue); color: #fff; }
.collins-mark img { display: block; width: 176px; max-height: 54px; }

.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); min-height: 650px; align-items: center; overflow: hidden; padding: 86px max(28px, calc((100vw - 1240px) / 2)) 120px; background: var(--navy); color: #fff; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.9); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,19,33,.98) 0%, rgba(3,19,33,.9) 50%, rgba(3,19,33,.42) 100%), linear-gradient(0deg, rgba(3,19,33,.78), transparent 55%); }
.hero-content, .hero-boundary { position: relative; z-index: 1; }
.hero-content { max-width: 800px; }
.lind-logo { display: block; width: 250px; max-height: 84px; margin-bottom: 38px; padding: 10px 14px; border-radius: 4px; background: rgba(255,255,255,.97); object-fit: contain; object-position: left center; box-shadow: 0 12px 30px rgba(0,0,0,.2); }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.hero .eyebrow { color: var(--lime); }
.hero h1 { max-width: 900px; margin: 0 0 22px; font-size: clamp(50px, 6vw, 84px); line-height: .96; letter-spacing: -.055em; }
.hero h1 em { color: var(--cyan); font-style: normal; }
.hero-content > p:last-of-type { max-width: 700px; color: #cadae4; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 29px; }
.hero-actions a { padding: 13px 18px; border: 1px solid rgba(255,255,255,.36); border-radius: 4px; background: rgba(255,255,255,.08); color: #fff; text-decoration: none; font-size: 13px; font-weight: 850; }
.hero-actions a:first-child { border-color: var(--blue); background: var(--blue); }
.hero-boundary { align-self: end; justify-self: end; max-width: 360px; padding: 24px; border: 1px solid rgba(255,255,255,.2); border-radius: 8px; background: rgba(4,28,46,.84); backdrop-filter: blur(14px); }
.hero-boundary span { color: var(--lime); font-size: 10px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.hero-boundary strong { display: block; margin: 10px 0 7px; font-size: 20px; line-height: 1.25; }
.hero-boundary p { margin: 0; color: #bfd1dd; font-size: 13px; }

.process-band { position: relative; z-index: 3; display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1240px; margin: -40px auto 0; background: #fff; box-shadow: 0 18px 55px rgba(7,26,46,.14); }
.process-band > div { display: grid; grid-template-columns: auto 1fr; gap: 0 14px; padding: 24px 28px; border-right: 1px solid var(--line); }
.process-band > div:last-child { border-right: 0; }
.process-band span { grid-row: 1 / 3; color: var(--blue); font-size: 25px; font-weight: 900; }
.process-band strong { font-size: 15px; }
.process-band small { color: var(--muted); }

.specification { max-width: 1240px; margin: 0 auto; padding: 115px 0 0; scroll-margin-top: 20px; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); gap: 70px; align-items: end; margin-bottom: 38px; }
.section-heading h2, .review-boundary h2 { margin: 0; font-size: clamp(40px, 5.4vw, 68px); line-height: .98; letter-spacing: -.05em; }
.section-heading > p { margin: 0; color: var(--muted); line-height: 1.75; }
.spec-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(350px, .7fr); gap: 18px; align-items: start; }
.spec-form { display: grid; gap: 14px; }
.form-section { padding: 31px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.form-section-heading { display: grid; grid-template-columns: 43px 1fr; gap: 15px; align-items: start; margin-bottom: 25px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.form-section-heading > span { display: grid; width: 43px; height: 43px; place-items: center; border-radius: 50%; background: var(--navy); color: #fff; font-size: 11px; font-weight: 900; }
.form-section-heading h3 { margin: 0 0 3px; font-size: 22px; }
.form-section-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field, .measurement-field { min-width: 0; }
.field.full, .measurement-field.full, .choice-field.full { grid-column: 1 / -1; }
.field label, .measurement-field > label, .choice-field legend { display: block; margin: 0 0 7px; color: #263f51; font-size: 12px; font-weight: 850; }
.field input, .field select, .field textarea, .measurement-field > div input, .measurement-field > div select { width: 100%; min-height: 49px; padding: 11px 12px; border: 1px solid #9fb1be; border-radius: 5px; background: #fff; color: var(--ink); }
.field textarea { min-height: 112px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus, .measurement-field input:focus, .measurement-field select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(8,125,184,.11); }
.field small { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; }
.measurement-field > div { display: grid; grid-template-columns: minmax(0, 1fr) 142px; gap: 7px; }
.choice-field { min-width: 0; margin: 0; padding: 0; border: 0; }
.choice-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.choice-grid label, .application-options label { position: relative; display: block; margin: 0; cursor: pointer; }
.choice-grid input, .application-options input { position: absolute; opacity: 0; pointer-events: none; }
.choice-grid span { display: flex; min-height: 46px; align-items: center; padding: 10px 12px; border: 1px solid #afbec8; border-radius: 5px; background: #fff; color: #334c5e; font-size: 12px; font-weight: 750; }
.choice-grid input:focus-visible + span, .application-options input:focus-visible + span { outline: 3px solid rgba(8,125,184,.2); outline-offset: 1px; }
.choice-grid input:checked + span, .application-options input:checked + span { border-color: var(--blue); background: #eaf7fd; color: var(--blue-dark); box-shadow: inset 0 0 0 1px var(--blue); }
.application-choice { margin-bottom: 22px; }
.application-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.application-options span { display: flex; min-height: 116px; flex-direction: column; justify-content: center; padding: 16px; border: 1px solid #aebdc8; border-radius: 7px; background: #f8fafb; }
.application-options b { font-size: 18px; }
.application-options small { margin-top: 5px; color: var(--muted); font-size: 11px; line-height: 1.4; }
.application-options input:checked + span small { color: #4b7289; }
.checkbox-field { grid-column: 1 / -1; margin-bottom: 19px; }
.environment-grid, .supporting-grid { grid-template-columns: repeat(3, 1fr); }
.conditional[hidden] { display: none; }
.field-note, .form-note { margin: 12px 0 0; padding: 12px 14px; border-left: 3px solid var(--blue); background: #f1f7fa; color: var(--muted); font-size: 12px; }
.cable-section { border-top: 4px solid var(--blue); }
.length-equation { display: grid; grid-template-columns: 1fr auto; gap: 4px 20px; align-items: center; margin-top: 22px; padding: 21px; border-radius: 7px; background: var(--navy); color: #fff; }
.length-equation > span { color: var(--cyan); font-size: 10px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.length-equation strong { grid-row: 1 / 3; grid-column: 2; font-size: 39px; line-height: 1; }
.length-equation small { color: #b9cbd7; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; padding-top: 12px; }
.form-actions button { min-height: 51px; padding: 13px 18px; border-radius: 5px; cursor: pointer; font-weight: 850; }
.clear-button { border: 1px solid #a8b7c2; background: transparent; color: var(--ink); }
.review-button { display: flex; min-width: 275px; justify-content: space-between; border: 0; background: var(--blue); color: #fff; }
.review-button:hover { background: var(--blue-dark); }
.form-status { min-height: 20px; margin: 0; color: #9b291f; font-size: 12px; font-weight: 800; }

.spec-result { position: sticky; top: 18px; min-height: 620px; overflow: hidden; border-radius: 8px; background: radial-gradient(circle at 86% 10%, rgba(117,212,243,.27), transparent 34%), linear-gradient(145deg, var(--navy), var(--navy-2)); color: #fff; }
.result-top { display: flex; align-items: center; justify-content: space-between; padding: 22px 28px; border-bottom: 1px solid rgba(255,255,255,.12); }
.result-top > span { color: var(--lime); font-size: 9px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.result-top img { width: 145px; max-height: 52px; padding: 6px 9px; border-radius: 3px; background: #fff; object-fit: contain; }
.result-empty, #result-complete { padding: 34px; }
.result-empty { display: flex; min-height: 530px; flex-direction: column; justify-content: center; }
.result-empty h3, #result-complete h3 { margin: 0 0 11px; font-size: 32px; line-height: 1.08; }
.result-empty p, #result-complete > p { color: #bdd0dd; }
.reel-mark { position: relative; width: 72px; height: 72px; margin-bottom: 24px; border: 3px solid var(--cyan); border-radius: 50%; }
.reel-mark::before, .reel-mark::after { content: ""; position: absolute; border: 2px solid var(--cyan); border-radius: 50%; }
.reel-mark::before { inset: 13px; }
.reel-mark::after { inset: 28px; background: var(--cyan); }
.reel-mark i { position: absolute; left: 67px; top: 33px; width: 45px; height: 3px; background: var(--cyan); }
.reel-mark b { position: absolute; left: 110px; top: 29px; width: 9px; height: 11px; border: 2px solid var(--cyan); }
.result-kicker { margin: 0 0 13px; color: var(--lime) !important; font-size: 9px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.total-card { margin: 25px 0 18px; padding: 20px; border: 1px solid rgba(117,212,243,.35); border-radius: 7px; background: rgba(117,212,243,.08); }
.total-card span, .total-card small { display: block; }
.total-card span { color: var(--cyan); font-size: 9px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.total-card strong { display: block; margin: 6px 0 3px; font-size: 48px; line-height: 1; }
.total-card small { color: #b9cfdd; }
#result-summary { display: grid; gap: 1px; max-height: 560px; overflow-y: auto; margin: 20px 0; padding-right: 4px; }
#result-summary div { padding: 10px 12px; background: rgba(255,255,255,.07); }
#result-summary dt { color: #90b3c8; font-size: 8px; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
#result-summary dd { margin: 3px 0 0; color: #fff; font-size: 12px; overflow-wrap: anywhere; }
.result-review-notes { margin: 18px 0; padding: 15px; border: 1px solid rgba(255,209,115,.32); border-radius: 6px; background: rgba(255,209,115,.08); }
.result-review-notes > strong { color: #ffe8b6; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.result-review-notes ul { margin: 9px 0 0; padding-left: 18px; }
.result-review-notes li { margin-top: 7px; color: #ecdfc6; font-size: 11px; line-height: 1.45; }
.result-boundary { padding: 15px; border-left: 3px solid var(--lime); background: rgba(184,228,106,.09); }
.result-boundary strong { color: #e7ffc0; font-size: 12px; }
.result-boundary p { margin: 4px 0 0; color: #ccddbb; font-size: 11px; }
.result-stale { margin: 15px 0 0; padding: 12px 14px; border-left: 3px solid #ffd173; background: rgba(255,209,115,.11); color: #ffe8b6 !important; font-size: 12px; font-weight: 800; }
.calculator-lead-slot { grid-column: 1 / -1; margin-top: 19px; }

.review-boundary { display: grid; grid-template-columns: .85fr 1.15fr; gap: 65px; max-width: 1240px; margin: 120px auto 0; padding: 66px; border-top: 5px solid var(--blue); background: #fff; box-shadow: 0 22px 60px rgba(7,26,46,.08); }
.boundary-grid { display: grid; gap: 14px; }
.boundary-grid p { margin: 0; color: var(--muted); }
.boundary-grid strong { display: block; color: var(--navy); }
.review-boundary > a { grid-column: 2; color: var(--blue); font-size: 13px; font-weight: 900; text-decoration: none; }
footer { display: flex; max-width: 1240px; align-items: center; gap: 25px; margin: 85px auto 0; padding: 32px 0; border-top: 1px solid #cbd7e0; color: var(--muted); font-size: 12px; }
footer img { width: 150px; }
footer p { flex: 1; }
footer a { color: var(--blue); font-weight: 800; }

@media (max-width: 1280px) {
  .process-band, .specification, .review-boundary, footer { margin-left: 24px; margin-right: 24px; }
}
@media (max-width: 1000px) {
  .spec-grid { grid-template-columns: 1fr; }
  .spec-result { position: static; min-height: 450px; }
  .result-empty { min-height: 360px; }
  .application-options { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 850px) {
  .site-header { grid-template-columns: 1fr auto; }
  .collins-mark { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 45px; padding-top: 70px; padding-bottom: 95px; }
  .hero-boundary { justify-self: start; }
  .process-band { grid-template-columns: repeat(2, 1fr); }
  .process-band > div:nth-child(2) { border-right: 0; }
  .process-band > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-heading, .review-boundary { grid-template-columns: 1fr; }
  .section-heading { gap: 22px; }
  .review-boundary > a { grid-column: auto; }
  .review-boundary { padding: 40px; gap: 32px; }
}
@media (max-width: 640px) {
  .concept-ribbon { justify-content: flex-start; overflow: hidden; white-space: nowrap; }
  .concept-ribbon span:last-child { display: none; }
  .site-header { padding: 16px 18px; }
  .hero { padding: 55px 22px 80px; }
  .hero h1 { font-size: 46px; }
  .lind-logo { width: 215px; }
  .process-band, .specification, .review-boundary, footer { margin-left: 14px; margin-right: 14px; }
  .process-band { margin-top: -25px; }
  .specification { padding-top: 80px; }
  .form-section { padding: 22px 18px; }
  .field-grid, .application-options, .choice-grid, .environment-grid, .supporting-grid { grid-template-columns: 1fr; }
  .measurement-field > div { grid-template-columns: minmax(0, 1fr) 118px; }
  .form-actions { align-items: stretch; flex-direction: column-reverse; }
  .review-button { min-width: 0; }
  .review-boundary { padding: 32px 24px; }
  footer { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 480px) {
  .process-band { grid-template-columns: 1fr; }
  .process-band > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .process-band > div:last-child { border-bottom: 0; }
}