:root {
  --navy-950: #041325;
  --navy-900: #06192e;
  --navy-800: #0b2744;
  --navy-700: #123a61;
  --aqua: #38d6ff;
  --aqua-600: #0ea5d6;
  --aqua-100: #e3f7fd;
  --ink: #0c1f33;
  --muted: #55687c;
  --bg: #f5f9fc;
  --surface: #ffffff;
  --line: #dce7f0;
  --on-dark: #e8f4fb;
  --on-dark-muted: #9fb6ca;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 20px 50px -24px rgba(6, 25, 46, 0.35);
  --font-body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Sora", var(--font-body);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas { display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.15; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.75rem); }
h3 { font-size: 1.2rem; }
p { margin: 0; }

.container { width: min(1200px, 100% - 32px); margin-inline: auto; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px; border-radius: 999px; border: 1px solid transparent;
  font: 600 1rem/1 var(--font-body); text-decoration: none; cursor: pointer;
  transition: transform .2s ease, background-color .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:focus-visible { outline: 3px solid var(--aqua); outline-offset: 3px; }
.btn--primary { background: var(--aqua); color: var(--navy-950); box-shadow: 0 10px 30px -12px rgba(56, 214, 255, .7); }
.btn--primary:hover { background: #6fe3ff; transform: translateY(-1px); }
.btn--ghost { color: var(--on-dark); border-color: rgba(232, 244, 251, .3); }
.btn--ghost:hover { border-color: var(--aqua); color: #fff; }
.btn--sm { padding: 10px 18px; font-size: .92rem; }
.btn--block { width: 100%; }

.eyebrow {
  font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--aqua); margin-bottom: 14px;
}
.eyebrow--dark { color: var(--aqua-600); }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  transition: background-color .3s ease, box-shadow .3s ease;
}
.nav.is-scrolled { background: rgba(4, 19, 37, .82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); box-shadow: 0 1px 0 rgba(255,255,255,.06); }
.nav__inner { display: flex; align-items: center; gap: 32px; height: 72px; }
.logo { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: #fff; font: 700 1.3rem/1 var(--font-head); letter-spacing: .12em; }
.logo svg { color: var(--aqua); }
.nav__links { display: flex; gap: 28px; margin-left: auto; }
.nav__links a { color: var(--on-dark-muted); text-decoration: none; font-weight: 500; font-size: .95rem; transition: color .2s; }
.nav__links a:hover { color: #fff; }
.nav__toggle { display: none; }

/* ---------- language toggle ---------- */
.lang { display: inline-flex; padding: 3px; border-radius: 999px; border: 1px solid rgba(232, 244, 251, .22); }
.lang button {
  min-width: 38px; padding: 6px 9px; border: 0; border-radius: 999px; background: transparent; cursor: pointer;
  font: 700 .74rem/1 var(--font-body); letter-spacing: .08em; color: var(--on-dark-muted); transition: background-color .2s, color .2s;
}
.lang button:hover { color: #fff; }
.lang button[aria-pressed="true"] { background: rgba(56, 214, 255, .16); color: var(--aqua); }
.lang button:focus-visible { outline: 2px solid var(--aqua); outline-offset: 2px; }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1000px 600px at 75% 40%, rgba(56, 214, 255, .14), transparent 60%),
    radial-gradient(800px 500px at 10% 100%, rgba(18, 58, 97, .8), transparent 70%),
    linear-gradient(180deg, var(--navy-950), var(--navy-900));
  color: var(--on-dark);
  min-height: 100svh;
  display: flex; align-items: center;
}
.hero__inner { display: grid; grid-template-columns: 1fr 1.05fr; gap: 24px; align-items: center; padding: 110px 0 60px; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 4rem); color: #fff; max-width: 15ch; text-wrap: balance; }
.hero h1 .word { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.08em; }
.hero h1 .word > span { display: inline-block; }
.lede { margin-top: 22px; font-size: 1.15rem; color: var(--on-dark-muted); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero__trust { list-style: none; padding: 0; margin: 38px 0 0; display: flex; flex-wrap: wrap; gap: 10px 24px; font-size: .92rem; color: var(--on-dark-muted); }
.hero__trust li { display: flex; align-items: center; gap: 8px; }
.hero__trust svg { width: 18px; height: 18px; fill: none; stroke: var(--aqua); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.hero__stage { position: relative; height: min(680px, 78svh); }
.hero__stage canvas { width: 100%; height: 100%; opacity: 0; transition: opacity 1s ease; }
.is-ready canvas { opacity: 1; }

.stage-label {
  position: absolute; left: 0; top: 0; pointer-events: none;
  display: flex; align-items: flex-start; gap: 10px;
  font-size: .82rem; font-weight: 600; color: var(--on-dark);
  opacity: 0; transition: opacity .8s ease .4s;
  will-change: transform;
  --d: 0;
}
.stage-label::before { content: ""; flex: none; width: 44px; height: 1px; margin-top: 15px; background: linear-gradient(90deg, var(--aqua), rgba(56,214,255,.2)); }
.stage-label > div { display: grid; gap: 6px; justify-items: start; }
.stage-label span { padding: 5px 10px; border-radius: 999px; white-space: nowrap; background: rgba(6, 25, 46, .7); border: 1px solid rgba(56, 214, 255, .25); backdrop-filter: blur(6px); }
.stage-label small {
  max-width: 190px; padding-left: 4px; font-size: .78rem; font-weight: 500; line-height: 1.4; color: var(--on-dark-muted);
  opacity: var(--d); transform: translateY(calc((1 - var(--d)) * 8px));
}
.is-ready .stage-label { opacity: 1; }

.stage-fallback { display: none; }
.no-webgl .stage-fallback {
  display: block; position: absolute; inset: 10%;
  border-radius: 40% 40% 24px 24px;
  background: linear-gradient(180deg, rgba(200,154,90,.35), rgba(56,214,255,.35));
  border: 1px solid rgba(56, 214, 255, .4);
}
.no-webgl .stage-label { display: none; }

/* CSS fade-in so it can't fight the scroll-driven fade-out in main.js */
.hero__hint, .scroll-cue { animation: fadeIn .6s ease 2.2s backwards; }
@keyframes fadeIn { from { opacity: 0; } }
.scroll-cue { position: absolute; left: 50%; bottom: 26px; translate: -50% 0; width: 26px; height: 42px; border: 2px solid rgba(232,244,251,.35); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--aqua); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

.hero__hint { position: absolute; left: 50%; bottom: 76px; translate: -50% 0; margin: 0; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--on-dark-muted); }

.progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 60; background: linear-gradient(90deg, var(--aqua-600), var(--aqua)); transform-origin: 0 50%; transform: scaleX(0); }

/* ---------- sections ---------- */
.section { padding: 110px 0; }
.section--tint { background: linear-gradient(180deg, var(--aqua-100), var(--bg)); }
.section--dark { background: var(--navy-900); color: var(--on-dark); }
.section__head { max-width: 640px; margin-bottom: 56px; }
.section__head p:not(.eyebrow) { margin-top: 16px; color: var(--muted); font-size: 1.08rem; }

/* ---------- systems: stacked cards ---------- */
.stack { display: grid; gap: 45vh; }
.stack__card {
  position: sticky; top: calc(96px + var(--i) * 16px);
  display: grid; grid-template-columns: 1.1fr 1fr; min-height: min(600px, calc(100svh - 140px));
  background: var(--surface); border: 1px solid var(--line); border-radius: 24px; overflow: hidden;
  box-shadow: 0 30px 60px -40px rgba(6, 25, 46, .45);
  transform-origin: 50% 0;
}
.stack__content { padding: 44px; display: flex; flex-direction: column; }
.stack__num { font: 600 .82rem/1 var(--font-head); color: var(--aqua-600); letter-spacing: .08em; margin-bottom: 18px; }
.stack__content h3 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
.stack__content > p { margin-top: 12px; color: var(--muted); }
.stack__actions { margin-top: auto; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: var(--aqua-600); text-decoration: none; }
.link-arrow span[aria-hidden] { transition: transform .25s ease; }
.link-arrow:hover span[aria-hidden], a:hover > .link-arrow span[aria-hidden] { transform: translateX(4px); }
.stack__art {
  position: relative; display: grid; place-items: center; padding: 32px;
  background:
    radial-gradient(90% 70% at 50% 30%, rgba(56, 214, 255, .16), transparent 70%),
    linear-gradient(160deg, var(--navy-800), var(--navy-950));
}
.stack__art::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px); background-size: 22px 22px; pointer-events: none; }
.art { width: 100%; max-width: 420px; height: auto; overflow: visible; }
.art path, .art rect, .art line, .art circle { fill: none; stroke: var(--aqua); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.art .thin { stroke-width: 1.5; stroke: rgba(56, 214, 255, .55); }
.art .ground { stroke: rgba(255, 255, 255, .18); stroke-width: 1.5; }
.art .copper { stroke: #e0965f; }
.art .accent { stroke: #a993ff; stroke-width: 3; filter: drop-shadow(0 0 6px #8a6bff); }
.art .fill { fill: var(--aqua); stroke: none; }

.specs { margin: 24px 0 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.specs div { display: grid; grid-template-columns: 96px 1fr; gap: 12px; padding: 13px 16px; background: var(--surface); }
.specs dt { font-weight: 700; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: var(--aqua-600); padding-top: 2px; }
.specs dd { margin: 0; font-size: .95rem; }

.checks { list-style: none; padding: 0; margin: 22px 0 28px; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 30px; font-size: .97rem; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--aqua-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m6 10.5 2.6 2.5L14 7.5' fill='none' stroke='%230ea5d6' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat;
}

/* ---------- steps ---------- */
.steps__track { height: 2px; margin: 0 0 28px; background: var(--line); border-radius: 2px; overflow: hidden; }
.steps__track span { display: block; height: 100%; background: linear-gradient(90deg, var(--aqua-600), var(--aqua)); transform-origin: 0 50%; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; }
.steps__num { display: inline-block; font: 700 .85rem/1 var(--font-head); color: var(--aqua-600); padding: 7px 10px; border-radius: 8px; background: var(--aqua-100); margin-bottom: 20px; }
.steps p { margin-top: 10px; color: var(--muted); font-size: .96rem; }

/* ---------- band ---------- */
.band {
  position: relative; overflow: hidden;
  padding: 110px 0; color: var(--on-dark);
  background:
    radial-gradient(700px 400px at 90% 10%, rgba(56,214,255,.16), transparent 60%),
    linear-gradient(135deg, var(--navy-800), var(--navy-950));
}
.band__orb { position: absolute; width: 520px; height: 520px; left: -160px; top: 10%; border-radius: 50%; background: radial-gradient(circle, rgba(56,214,255,.22), transparent 65%); pointer-events: none; }
.band__inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.band h2 { color: #fff; }
.band__copy p:not(.eyebrow) { margin: 18px 0 30px; color: var(--on-dark-muted); font-size: 1.08rem; }
.band__grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.band__grid li { padding: 20px; border-radius: var(--radius-sm); background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.09); display: grid; gap: 4px; }
.band__grid strong { color: #fff; font-weight: 600; }
.band__grid span { color: var(--aqua); font-size: .9rem; }

/* ---------- contaminants ---------- */
.contams { perspective: 1200px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.contam { transform-style: preserve-3d; will-change: transform; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; transition: box-shadow .25s ease, border-color .25s; }
.contam:hover { box-shadow: var(--shadow); border-color: #bfe6f5; }
.contam h3 { font-size: 1.05rem; }
.contam p { margin: 8px 0 16px; color: var(--muted); font-size: .93rem; }
.tag { display: inline-block; margin: 0 6px 6px 0; padding: 4px 10px; border-radius: 999px; background: var(--aqua-100); color: #08739a; font-size: .76rem; font-weight: 700; }

/* ---------- CTA / form ---------- */
.cta { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
.cta h2 { color: #fff; }
.cta__copy p:not(.eyebrow) { margin-top: 18px; color: var(--on-dark-muted); font-size: 1.08rem; }
.cta__contact { list-style: none; padding: 0; margin: 34px 0 0; display: grid; gap: 12px; }
.cta__contact li { display: flex; gap: 16px; align-items: baseline; }
.cta__contact span { width: 52px; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--on-dark-muted); }
.cta__contact a { color: #fff; font-weight: 600; font-size: 1.15rem; text-decoration: none; }
.cta__contact a:hover { color: var(--aqua); }

.form { background: var(--surface); color: var(--ink); border-radius: var(--radius); padding: 32px; display: grid; gap: 18px; box-shadow: 0 30px 80px -30px rgba(0,0,0,.6); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: grid; gap: 7px; font-size: .88rem; font-weight: 600; }
.form input:not([type="radio"]), .form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font: 500 1rem/1.4 var(--font-body); color: var(--ink); background: var(--bg); transition: border-color .2s, box-shadow .2s;
}
.form textarea { resize: vertical; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--aqua-600); box-shadow: 0 0 0 4px rgba(56,214,255,.2); }
.form input[aria-invalid="true"] { border-color: #d64545; }
.form__source { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.form__source legend { font-size: .88rem; font-weight: 600; margin-bottom: 8px; padding: 0; }
.form__source label { display: flex; align-items: center; gap: 8px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; font-weight: 500; cursor: pointer; }
.form__source label:has(input:checked) { border-color: var(--aqua-600); background: var(--aqua-100); }
.form__source input { accent-color: var(--aqua-600); margin: 0; }
.optional { color: var(--muted); font-weight: 500; }
.form__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form button[disabled] { opacity: .7; cursor: progress; }
.form__consent { font-size: .76rem; line-height: 1.5; color: var(--muted); }
.form__consent a { color: inherit; }
.form__status { min-height: 1.4em; font-size: .92rem; font-weight: 600; color: #0b7a55; }
.form__status.is-error { color: #c23a3a; }

/* ---------- subpages ---------- */
.page-hero {
  padding: 140px 0 90px; color: var(--on-dark);
  background:
    radial-gradient(900px 500px at 80% 30%, rgba(56, 214, 255, .13), transparent 60%),
    linear-gradient(180deg, var(--navy-950), var(--navy-900));
}
.page-hero__inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.page-hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.5rem); color: #fff; max-width: 17ch; text-wrap: balance; }
.page-hero--simple { padding-bottom: 60px; }
.page-hero__art {
  position: relative; display: grid; place-items: center; padding: 36px; border-radius: 24px;
  border: 1px solid rgba(56, 214, 255, .16);
  background: radial-gradient(90% 70% at 50% 30%, rgba(56, 214, 255, .14), transparent 70%), linear-gradient(160deg, var(--navy-800), var(--navy-950));
}
.page-hero__art::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px); background-size: 22px 22px; pointer-events: none; }
.crumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; font-size: .85rem; color: var(--on-dark-muted); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: #fff; }
.crumbs [aria-current] { color: var(--on-dark); }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 40px 0 0; padding-top: 26px; border-top: 1px solid rgba(232, 244, 251, .12); }
.facts dt { font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--aqua); }
.facts dd { margin: 6px 0 0; font-size: .95rem; color: #fff; }

.chips { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.chip { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; transition: box-shadow .25s, border-color .25s; }
.chip:hover { box-shadow: var(--shadow); border-color: #bfe6f5; }
.chip h3 { font-size: 1.08rem; }
.chip p { margin-top: 8px; color: var(--muted); font-size: .95rem; }

.stages { max-width: 860px; }
.stages { position: relative; list-style: none; padding: 0; margin: 0; display: grid; gap: 34px; }
.stages__line { position: absolute; left: 27px; top: 28px; bottom: 28px; width: 2px; background: var(--line); }
.stages__line span { display: block; height: 100%; background: linear-gradient(180deg, var(--aqua-600), var(--aqua)); transform-origin: 50% 0; }
.stage { position: relative; display: grid; grid-template-columns: 56px 1fr; gap: 26px; align-items: start; }
.stage__num {
  display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--line); font: 700 .95rem/1 var(--font-head); color: var(--muted);
  transition: background-color .4s, border-color .4s, color .4s, box-shadow .4s;
}
.stage.is-active .stage__num { background: var(--aqua); border-color: var(--aqua); color: var(--navy-950); box-shadow: 0 0 0 8px rgba(56, 214, 255, .15); }
.stage h3 { font-size: 1.25rem; padding-top: 14px; }
.stage p { margin-top: 8px; color: var(--muted); }

.fit { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.fit__col { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.fit__col h3 { margin-bottom: 18px; }
.fit__col .checks { margin: 0; }
.fit__col--note { background: var(--navy-900); border-color: var(--navy-800); color: var(--on-dark); }
.fit__col--note h3 { color: #fff; }
.dots { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.dots li { position: relative; padding-left: 22px; color: var(--on-dark); }
.dots li::before { content: ""; position: absolute; left: 0; top: .6em; width: 8px; height: 8px; border-radius: 50%; background: var(--aqua); box-shadow: 0 0 10px var(--aqua); }

.care { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.care table { width: 100%; min-width: 560px; border-collapse: collapse; }
.care th, .care td { padding: 16px 22px; text-align: left; vertical-align: top; }
.care thead th { font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--aqua-600); background: #f9fcfe; }
.care tbody tr { border-top: 1px solid var(--line); }
.care tbody th { font-weight: 600; }
.care td { color: var(--muted); }
.care td:nth-child(2) { color: var(--ink); font-weight: 600; white-space: nowrap; }
.care__note { margin-top: 14px; font-size: .88rem; color: var(--muted); }

.faq { max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 22px 4px;
  font-weight: 600; font-size: 1.06rem; cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--aqua-100)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M10 5v10M5 10h10' stroke='%230ea5d6' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center/14px no-repeat;
  transition: transform .3s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:focus-visible { outline: 3px solid var(--aqua); outline-offset: 2px; border-radius: 6px; }
.faq details p { padding: 0 4px 24px; color: var(--muted); max-width: 70ch; }

.related { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.related__card { display: grid; gap: 10px; padding: 30px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; transition: box-shadow .25s, border-color .25s; }
.related__card:hover { box-shadow: var(--shadow); border-color: #bfe6f5; }
.related__card p { color: var(--muted); }
.related__card .link-arrow { margin-top: 6px; }

.prose { max-width: 760px; }
.prose__intro { font-size: 1.12rem; color: var(--ink); }
.prose h2 { font-size: 1.35rem; margin: 44px 0 12px; }
.prose p { margin: 0 0 14px; color: var(--muted); }
.prose strong { color: var(--ink); }
mark.ph { background: #fff1a8; color: #5c4700; padding: 0 4px; border-radius: 4px; }

/* ---------- financing calculator ---------- */
.calc { display: grid; grid-template-columns: 1fr 1.1fr; gap: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 24px; overflow: hidden; box-shadow: 0 30px 60px -40px rgba(6, 25, 46, .45); }
.calc__inputs { display: grid; gap: 22px; align-content: start; padding: 36px; }
.calc__inputs label { display: grid; gap: 8px; font-size: .88rem; font-weight: 600; }
.calc__money { display: flex; align-items: center; gap: 6px; padding: 0 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); font-size: 1.3rem; font-weight: 700; color: var(--muted); }
.calc__money:focus-within { border-color: var(--aqua-600); box-shadow: 0 0 0 4px rgba(56,214,255,.2); }
.calc__money input { width: 100%; padding: 14px 0; border: 0; background: transparent; font: 700 1.3rem/1 var(--font-head); color: var(--ink); outline: none; }
.calc select { width: 100%; padding: 13px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); font: 600 1rem/1.2 var(--font-body); color: var(--ink); }
.calc select:focus { outline: none; border-color: var(--aqua-600); box-shadow: 0 0 0 4px rgba(56,214,255,.2); }
.calc__results { padding: 36px; display: grid; gap: 12px; align-content: start; color: var(--on-dark); background: radial-gradient(90% 70% at 50% 0%, rgba(56, 214, 255, .16), transparent 70%), linear-gradient(160deg, var(--navy-800), var(--navy-950)); }
.calc__label { font-size: .74rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--aqua); margin-bottom: 4px; }
.calc__row { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 16px 18px; border-radius: var(--radius-sm); background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.09); }
.calc__tier { display: grid; gap: 2px; }
.calc__name { font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--on-dark-muted); }
.calc__apr { font: 700 1.05rem/1.2 var(--font-head); color: var(--aqua); }
.calc__row:first-of-type { border-color: rgba(56, 214, 255, .45); background: rgba(56, 214, 255, .08); }
.calc__pay { font: 700 1.6rem/1 var(--font-head); color: #fff; }
.calc__per { font-size: .85rem; color: var(--on-dark-muted); }
.calc__disclosure { max-width: 900px; }

/* ---------- footer ---------- */
.footer { background: var(--navy-950); color: var(--on-dark-muted); padding: 40px 0; font-size: .9rem; }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.footer nav { display: flex; flex-wrap: wrap; gap: 22px; }
.footer nav a { text-decoration: none; }
.footer nav a:hover { color: #fff; }

/* ---------- responsive ---------- */
@media (max-width: 1200px) {
  .hero__hint { display: none; }
  .stage-label span { white-space: normal; max-width: 150px; }
}

@media (max-width: 1024px) {
  .chips { grid-template-columns: repeat(2, 1fr); }
  .steps, .contams { grid-template-columns: repeat(2, 1fr); }
  .stack__card { grid-template-columns: 1fr; min-height: 0; }
  .stack__art { order: -1; padding: 24px; }
  .art { max-width: 300px; }
}

@media (max-width: 860px) {
  .calc { grid-template-columns: 1fr; }
  .calc__inputs, .calc__results { padding: 26px 22px; }
  .page-hero { padding: 116px 0 64px; }
  .page-hero__inner { grid-template-columns: 1fr; gap: 36px; }
  .page-hero__art { padding: 24px; }
  .page-hero__art .art { max-width: 300px; }
  .fit, .related { grid-template-columns: 1fr; }
  .nav__links {
    position: fixed; inset: 72px 0 auto; flex-direction: column; gap: 0; padding: 8px 16px 20px;
    background: rgba(4, 19, 37, .97); transform: translateY(-120%); transition: transform .35s ease; z-index: -1;
  }
  .nav__links a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.07); font-size: 1.05rem; }
  .nav.is-open .nav__links { transform: none; }
  .nav.is-open { background: rgba(4, 19, 37, .97); }
  .lang { margin-left: auto; }
  .nav__toggle { display: grid; gap: 6px; place-content: center; width: 42px; height: 42px; border: 0; background: transparent; cursor: pointer; }
  .nav__toggle span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: transform .3s; }
  .nav.is-open .nav__toggle span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav.is-open .nav__toggle span:last-child { transform: translateY(-4px) rotate(-45deg); }

  .hero { min-height: 0; }
  .hero__inner { grid-template-columns: 1fr; padding: 108px 0 40px; gap: 8px; }
  .hero__stage { height: 480px; }
  .stage-label { font-size: .74rem; }
  .stage-label::before { width: 22px; margin-top: 12px; }
  .stage-label small, .hero__hint { display: none; }
  .scroll-cue { display: none; }
  .band__inner, .cta { grid-template-columns: 1fr; gap: 40px; }
  .section, .band { padding: 80px 0; }
}

@media (max-width: 560px) {
  .chips, .facts { grid-template-columns: 1fr; }
  .facts { gap: 14px; }
  .stage { grid-template-columns: 44px 1fr; gap: 18px; }
  .stage__num { width: 44px; height: 44px; }
  .stages__line { left: 21px; }
  .stage h3 { padding-top: 9px; }
  .fit__col { padding: 24px; }
  body { font-size: 16px; }
  .nav__inner > .btn { display: none; }
  .steps, .contams, .band__grid, .form__row { grid-template-columns: 1fr; }
  .stack__content { padding: 26px 22px; }
  .stack { gap: 28px; }
  .stack__card { position: relative; top: 0; }
  .form { padding: 22px; }
  .specs div { grid-template-columns: 1fr; gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}