:root {
  --paper: #f5f8fc;
  --white: #ffffff;
  --ink: #07182e;
  --ink-2: #102743;
  --blue: #1f5eff;
  --blue-deep: #0f45d7;
  --blue-soft: #e6edff;
  --muted: #5f7086;
  --line: #cbd6e4;
  --control-line: #7f8fa3;
  --line-dark: rgba(255, 255, 255, .2);
  --header-h: 82px;
  --shell: 1480px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --font: "Geologica", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

main [id] { scroll-margin-top: calc(var(--header-h) + 24px); }

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background:
    linear-gradient(rgba(7, 24, 46, .035) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 64px;
  font-family: var(--font);
  font-size: 16px;
  font-weight: 350;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open { overflow-y: hidden; }

[inert] { pointer-events: none; }

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: .18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.article-content p a:not(.button):not(.text-link) { text-decoration: underline; text-underline-offset: .18em; text-decoration-thickness: 1px; }
button, input, select { font: inherit; }
button { color: inherit; }
figure { margin: 0; }
h1, h2, h3, p { margin-top: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  z-index: 120;
  top: 12px;
  left: 12px;
  padding: 12px 18px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
  transition: transform .2s ease;
}

.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  z-index: 60;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  padding: 0 clamp(20px, 3vw, 54px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: var(--ink);
  border-bottom: 1px solid rgba(7, 24, 46, .13);
  background: rgba(245, 248, 252, .88);
  backdrop-filter: blur(18px) saturate(1.35);
  transition: height .35s var(--ease), background .35s var(--ease), box-shadow .35s var(--ease);
}

.site-header.is-scrolled {
  height: 68px;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 18px 48px rgba(7, 24, 46, .08);
}

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: block;
}

.brand-mark img { width: 100%; height: 100%; }

.brand-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(26px, 3vw, 54px);
}

.site-nav a,
.header-action {
  position: relative;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 3px;
  height: 2px;
  background: var(--blue);
  transition: right .35s var(--ease);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after { right: 0; }

.header-action {
  justify-self: end;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.header-action svg,
.button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
}

.menu-toggle { display: none; }

.hero {
  position: relative;
  min-height: 100dvh;
  padding: calc(var(--header-h) + 54px) clamp(24px, 4vw, 70px) 42px;
  display: grid;
  grid-template-columns: minmax(420px, .78fr) minmax(560px, 1.22fr);
  align-items: stretch;
  gap: clamp(38px, 5vw, 86px);
  overflow: hidden;
  background:
    linear-gradient(90deg, transparent 0 47.8%, rgba(31, 94, 255, .11) 47.8% 48%, transparent 48%),
    var(--paper);
}

.hero::before {
  content: "";
  position: absolute;
  left: clamp(24px, 4vw, 70px);
  top: calc(var(--header-h) + 26px);
  bottom: 38px;
  width: 4px;
  background: var(--blue);
}

.hero-copy {
  position: relative;
  z-index: 2;
  grid-column: 1;
  grid-row: 1;
  max-width: 690px;
  padding: clamp(58px, 9vh, 114px) 0 0 clamp(22px, 2.2vw, 42px);
  align-self: center;
}

.eyebrow,
.section-number,
.route-label,
.guide-meta,
.breadcrumb,
.filter-label,
.result-confidence,
.hero-media-index {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--blue);
}

.eyebrow span:last-child { color: var(--muted); }

.hero h1 {
  max-width: 760px;
  margin-bottom: 30px;
  font-size: clamp(58px, 6.6vw, 114px);
  font-weight: 300;
  line-height: .9;
  letter-spacing: -.073em;
}

.hero h1 em,
.inner-heading h1 em,
.section-intro h2 em,
.method-copy h2 em {
  display: block;
  color: var(--blue);
  font-style: normal;
  font-weight: 600;
}

.hero-lead {
  max-width: 570px;
  margin-bottom: 36px;
  color: #40536a;
  font-size: clamp(16px, 1.25vw, 20px);
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 26px;
}

.button {
  min-height: 54px;
  padding: 0 24px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .09em;
  text-transform: uppercase;
  transition: transform .35s var(--ease), background .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
}

.button:active { transform: scale(.98); }
.button-primary { color: var(--white); background: var(--blue); }
.button-primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
.button-dark { color: var(--white); background: var(--ink); }
.button-dark:hover { color: var(--ink); background: var(--white); transform: translateY(-2px); }
.button-light { color: var(--ink); background: var(--white); }
.button-light:hover { color: var(--white); background: var(--blue); transform: translateY(-2px); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-bottom: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  transition: color .3s ease;
}

.text-link:hover { color: var(--blue); }

.hero-principles {
  max-width: 640px;
  margin: 18px 0 0 clamp(22px, 2.2vw, 42px);
  grid-column: 1;
  grid-row: 2;
  align-self: end;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.hero-principles div { padding: 15px 16px 0 0; }
.hero-principles div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.hero-principles dt { color: var(--blue); font-family: var(--mono); font-size: 10px; }
.hero-principles dd { margin: 7px 0 0; color: var(--muted); font-size: 11px; line-height: 1.4; }

.hero-media,
.inner-hero-media {
  position: relative;
  min-height: 640px;
  overflow: hidden;
  background: #dce5f0;
  box-shadow: 0 34px 90px rgba(32, 63, 104, .16);
}

.hero-media { grid-column: 2; grid-row: 1 / 3; align-self: stretch; }

.hero-media::after,
.inner-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: inset 0 0 0 1px rgba(7, 24, 46, .08);
}

.hero-media img,
.inner-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: translate3d(var(--media-x, 0), var(--media-y, 0), 0) scale(1.035);
  transition: transform .75s var(--ease);
  will-change: transform;
}

.hero-media-index {
  position: absolute;
  z-index: 2;
  right: 20px;
  bottom: 20px;
  padding: 8px 11px;
  color: var(--white);
  background: rgba(7, 24, 46, .82);
  backdrop-filter: blur(10px);
}

.hero-media-rule {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: 5px;
  height: 31%;
  background: var(--blue);
}

.scroll-cue {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .1em;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.scroll-cue i { width: 52px; height: 1px; background: currentColor; }

.ticker {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
  border-block: 1px solid rgba(255, 255, 255, .12);
}

.ticker-track {
  width: max-content;
  padding: 17px 0;
  display: flex;
  align-items: center;
  gap: 28px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  animation: ticker 26s linear infinite;
}

.ticker.is-paused .ticker-track { animation-play-state: paused; }

.ticker-toggle {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: 14px;
  min-width: 76px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--control-line);
  color: var(--white);
  background: var(--ink);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
  transform: translateY(-50%);
  cursor: pointer;
}

.ticker-toggle:hover { border-color: #a9c1ff; }

.ticker-track i { width: 5px; height: 5px; background: var(--blue); transform: rotate(45deg); }
@keyframes ticker { to { transform: translateX(-50%); } }

.section-shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(96px, 10vw, 150px) clamp(22px, 4vw, 64px);
}

.section-intro {
  margin-bottom: clamp(48px, 7vw, 92px);
  display: grid;
  grid-template-columns: minmax(150px, .45fr) minmax(480px, 1.2fr) minmax(260px, .55fr);
  align-items: end;
  gap: clamp(24px, 4vw, 60px);
}

.section-number { margin-bottom: 0; color: var(--blue); }

.section-intro h2,
.method-copy h2,
.editorial-head h2,
.explainer-copy h2 {
  margin-bottom: 0;
  font-size: clamp(42px, 5.2vw, 82px);
  font-weight: 300;
  line-height: .98;
  letter-spacing: -.055em;
}

.section-intro > p:last-child,
.explainer-copy > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.routes-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: 270px;
  gap: 12px;
}

.route {
  position: relative;
  min-height: 270px;
  padding: clamp(22px, 3vw, 38px);
  overflow: hidden;
  isolation: isolate;
  color: var(--white);
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, .1);
}

.route::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 24, 46, .12) 0%, rgba(7, 24, 46, .9) 78%);
}

.route-main { grid-column: 1 / 8; grid-row: span 2; }
.route-calculator { grid-column: 8 / 13; }
.route-service { grid-column: 8 / 11; }
.route-auth { grid-column: 11 / 13; }

.route-media {
  position: absolute;
  z-index: -2;
  inset: 0;
}

.route-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--ease), filter .8s var(--ease);
}

.route:hover .route-media img { transform: scale(1.045); filter: saturate(1.08); }
.route-index { position: absolute; top: 24px; right: 26px; color: rgba(255, 255, 255, .7); font-family: var(--mono); font-size: 11px; }
.route-copy { position: absolute; left: clamp(22px, 3vw, 38px); right: 24px; bottom: clamp(24px, 3vw, 38px); }
.route-label { margin-bottom: 12px; color: #a9c1ff; }
.route h3 { max-width: 650px; margin-bottom: 12px; font-size: clamp(28px, 3.2vw, 56px); font-weight: 350; line-height: 1; letter-spacing: -.045em; }
.route-service h3, .route-auth h3 { font-size: clamp(23px, 2vw, 34px); }
.route p:not(.route-label) { max-width: 530px; margin-bottom: 0; color: rgba(255, 255, 255, .75); font-size: 13px; line-height: 1.55; }
.route-arrow { position: absolute; right: 26px; bottom: 24px; font-family: var(--mono); font-size: 16px; }

.method {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(400px, .92fr);
  align-items: center;
  gap: clamp(54px, 8vw, 120px);
}

.method-visual {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  background: #dce5f0;
}

.method-visual img { width: 100%; height: 100%; object-fit: cover; object-position: 40% center; }
.method-visual p { position: absolute; left: 0; bottom: 0; margin: 0; padding: 18px 24px; color: var(--white); background: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
.method-copy .section-number { margin-bottom: 32px; }
.method-copy h2 { margin-bottom: 34px; }
.method-lead { margin-bottom: 50px; color: #43566d; font-size: 17px; line-height: 1.72; }
.method-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.method-list li { padding: 24px 0; display: grid; grid-template-columns: 54px 1fr; gap: 16px; border-bottom: 1px solid var(--line); }
.method-list li > span { color: var(--blue); font-family: var(--mono); font-size: 10px; }
.method-list h3 { margin-bottom: 6px; font-size: 18px; font-weight: 500; letter-spacing: -.02em; }
.method-list p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

.editorial { padding-top: 40px; }
.editorial-head { margin-bottom: 48px; display: grid; grid-template-columns: .4fr 1.1fr auto; align-items: end; gap: 32px; }
.editorial-head h2 { max-width: 810px; }
.editorial-feature {
  position: relative;
  min-height: 650px;
  display: grid;
  grid-template-columns: 1.25fr .32fr .65fr;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.editorial-feature::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7, 24, 46, .03) 35%, rgba(7, 24, 46, .96) 76%); }
.editorial-media { position: absolute; inset: 0; }
.editorial-media img { width: 100%; height: 100%; object-fit: cover; }
.feature-number, .feature-copy { position: relative; z-index: 2; }
.feature-number { grid-column: 2; padding: 0 22px 48px; font-family: var(--mono); }
.feature-number span { display: block; font-size: clamp(72px, 8vw, 136px); font-weight: 400; line-height: .82; letter-spacing: -.08em; }
.feature-number small { color: #a9c1ff; font-size: 12px; }
.feature-copy { grid-column: 3; padding: 0 46px 48px 20px; }
.feature-copy h3 { margin-bottom: 18px; font-size: clamp(26px, 2.4vw, 40px); font-weight: 350; line-height: 1.12; letter-spacing: -.035em; }
.feature-copy > p:not(.route-label) { margin-bottom: 28px; color: rgba(255, 255, 255, .74); font-size: 13px; }

.decision-strip {
  min-height: 240px;
  padding: clamp(48px, 6vw, 82px) clamp(24px, 6vw, 96px);
  display: grid;
  grid-template-columns: minmax(140px, .35fr) minmax(320px, 1fr) auto;
  align-items: center;
  gap: clamp(30px, 5vw, 80px);
  color: var(--white);
  background: var(--blue);
}

.decision-strip-label { margin-bottom: 0; color: #eef2ff; font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.decision-strip-copy h2 { margin-bottom: 12px; font-size: clamp(30px, 3.2vw, 50px); font-weight: 350; line-height: 1; letter-spacing: -.045em; }
.decision-strip-copy p { max-width: 680px; margin-bottom: 0; color: rgba(255, 255, 255, .95); font-size: 13px; line-height: 1.65; }
.decision-strip .button { white-space: nowrap; }
.decision-strip .button:focus-visible { outline-color: var(--ink); }

.site-footer {
  padding: 72px clamp(24px, 4vw, 70px) 32px;
  display: grid;
  grid-template-columns: 1.1fr .6fr .8fr;
  gap: 42px;
  color: var(--white);
  background: var(--ink);
  border-top: 1px solid var(--line-dark);
}

.site-footer .brand { margin-bottom: 24px; }
.footer-brand > p, .footer-note { max-width: 420px; color: rgba(255, 255, 255, .58); font-size: 12px; line-height: 1.65; }
.site-footer nav { display: grid; align-content: start; gap: 12px; font-size: 13px; }
.site-footer nav a:hover { color: #a9c1ff; }
.footer-copy { grid-column: 1 / -1; margin: 36px 0 0; padding-top: 24px; color: rgba(255, 255, 255, .5); border-top: 1px solid var(--line-dark); font-family: var(--mono); font-size: 9px; text-transform: uppercase; }

.hero-inner {
  position: relative;
  min-height: min(86dvh, 900px);
  padding: calc(var(--header-h) + 64px) clamp(24px, 4vw, 70px) 54px;
  display: grid;
  grid-template-columns: minmax(400px, .78fr) minmax(540px, 1.22fr);
  grid-template-rows: auto 1fr;
  gap: 34px clamp(40px, 6vw, 100px);
  background: var(--paper);
}

.breadcrumb { grid-column: 1 / -1; align-self: start; display: flex; gap: 12px; color: var(--muted); }
.breadcrumb a:hover { color: var(--blue); }
.inner-heading { grid-column: 1; align-self: center; padding-left: clamp(18px, 2vw, 34px); border-left: 4px solid var(--blue); }
.inner-heading .section-number { margin-bottom: 30px; }
.inner-heading h1 { margin-bottom: 28px; font-size: clamp(52px, 5.8vw, 96px); font-weight: 300; line-height: .92; letter-spacing: -.065em; }
.inner-heading > p:last-child { max-width: 570px; margin-bottom: 0; color: #43566d; font-size: clamp(15px, 1.25vw, 19px); line-height: 1.65; }
.inner-hero-media { grid-column: 2; grid-row: 2; min-height: 540px; }

.purchase-selector {
  padding-top: 96px;
  display: grid;
  grid-template-columns: minmax(250px, .7fr) minmax(340px, 1fr) minmax(420px, 1.18fr);
  align-items: start;
  gap: 14px;
}

.selector-intro { padding: 30px 28px 30px 0; }
.selector-intro .section-number { margin-bottom: 30px; }
.selector-intro h2 { margin-bottom: 24px; font-size: clamp(38px, 4vw, 62px); font-weight: 350; line-height: .98; letter-spacing: -.055em; }
.selector-intro > p:last-child { max-width: 420px; margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.selector-form {
  margin: 0;
  padding: 34px;
  background: var(--white);
  border-top: 4px solid var(--blue);
  box-shadow: 0 24px 70px rgba(27, 55, 92, .08);
}

.selector-field { min-width: 0; margin: 0 0 30px; padding: 0 0 30px; border: 0; border-bottom: 1px solid var(--line); }
.selector-field:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
.selector-field > label,
.selector-field legend { margin-bottom: 12px; display: block; color: var(--ink); font-size: 13px; font-weight: 500; }
.selector-field select {
  width: 100%;
  min-height: 50px;
  padding: 0 44px 0 14px;
  color: var(--ink);
  border: 1px solid var(--control-line);
  border-radius: 0;
  background: var(--paper);
  cursor: pointer;
}
.selector-field--range .range-value label { margin-bottom: 0; }
.selector-field--range input[type="range"] { --range-fill: 40%; }
.selector-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 7px; }
.selector-options--three { grid-template-columns: repeat(3, 1fr); }
.selector-options label { position: relative; }
.selector-options input { position: absolute; opacity: 0; pointer-events: none; }
.selector-options span {
  min-height: 48px;
  padding: 8px 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--control-line);
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.35;
  text-align: center;
  cursor: pointer;
  transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease;
}
.selector-options label:active span { transform: scale(.98); }
.selector-options input:checked + span { color: var(--white); background: var(--blue); border-color: var(--blue); }
.selector-options input:focus-visible + span { outline: 3px solid var(--blue); outline-offset: 3px; }

.selector-result {
  position: relative;
  min-height: 100%;
  padding: clamp(34px, 4vw, 58px);
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 84% 14%, rgba(31, 94, 255, .6), transparent 30%),
    var(--ink);
}
.selector-result::before { content: ""; position: absolute; inset: 16px; pointer-events: none; border: 1px solid rgba(255, 255, 255, .14); }
.selector-result > * { position: relative; z-index: 1; }
.selector-result-head { margin-bottom: clamp(48px, 6vw, 86px); display: flex; justify-content: space-between; gap: 20px; }
.selector-result-head .section-number { color: #a9c1ff; }
.selector-result-head > span { color: rgba(255, 255, 255, .62); font-family: var(--mono); font-size: 10px; }
.selector-result h3 { max-width: 620px; margin-bottom: 34px; font-size: clamp(34px, 3.5vw, 58px); font-weight: 350; line-height: 1; letter-spacing: -.05em; }
.selector-specs { margin: 0 0 28px; border-block: 1px solid rgba(255, 255, 255, .18); }
.selector-specs div { padding: 15px 0; display: grid; grid-template-columns: minmax(120px, .7fr) 1.3fr; gap: 20px; }
.selector-specs div + div { border-top: 1px solid rgba(255, 255, 255, .12); }
.selector-specs dt { color: rgba(255, 255, 255, .48); font-size: 10px; }
.selector-specs dd { margin: 0; font-family: var(--mono); font-size: 12px; line-height: 1.45; }
.selector-result > p { margin-bottom: 28px; color: rgba(255, 255, 255, .7); font-size: 13px; line-height: 1.65; }
.selector-result .button { margin-bottom: 0; }

.category-tools { padding-top: 74px; }
.filter-bar {
  position: relative;
  z-index: 3;
  margin-bottom: 52px;
  padding: 22px 24px;
  display: grid;
  grid-template-columns: auto minmax(260px, 1fr) auto minmax(260px, 1fr) auto;
  align-items: center;
  gap: 18px;
  color: var(--white);
  background: var(--ink);
  box-shadow: 0 24px 60px rgba(7, 24, 46, .14);
}

.filter-label { color: #91a4ba; }
.filter-group { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-chip { min-height: 44px; padding: 0 14px; border: 1px solid var(--control-line); color: var(--white); background: transparent; font-family: var(--mono); font-size: 9px; letter-spacing: .04em; cursor: pointer; transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease; }
.filter-chip:hover { border-color: #8aa9ff; }
.filter-chip:active { transform: scale(.97); }
.filter-chip.is-active { color: var(--white); background: var(--blue); border-color: var(--blue); }
.filter-status { color: #a9c1ff; white-space: nowrap; }

.category-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
}

.category-grid.is-filtered {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

.category-grid.is-filtered .guide-card:nth-child(n) { grid-column: auto; }

.guide-card {
  position: relative;
  min-height: 490px;
  padding: 20px 22px 60px;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background: var(--white);
  border-top: 4px solid var(--ink);
  box-shadow: 0 18px 52px rgba(28, 57, 95, .08);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), border-color .45s var(--ease);
}

.guide-card:nth-child(1) { grid-column: 1 / 8; }
.guide-card:nth-child(2) { grid-column: 8 / 13; }
.guide-card:nth-child(3) { grid-column: 1 / 5; }
.guide-card:nth-child(4) { grid-column: 5 / 9; }
.guide-card:nth-child(5) { grid-column: 9 / 13; }
.guide-card:nth-child(6) { grid-column: 3 / 11; }
.guide-card:is(a, button):hover { transform: translateY(-6px); border-color: var(--blue); box-shadow: 0 28px 70px rgba(28, 57, 95, .14); }
.guide-card[hidden] { display: none; }
.guide-meta { margin-bottom: 18px; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); }
.guide-media { height: 230px; margin: 0 -22px 26px; overflow: hidden; background: #dce5f0; }
.guide-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.guide-card:is(a, button):hover .guide-media img { transform: scale(1.045); }
.guide-card h2 { margin-bottom: 14px; font-size: clamp(25px, 2.2vw, 36px); font-weight: 350; line-height: 1.08; letter-spacing: -.035em; }
.guide-card p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.guide-arrow { position: absolute; right: 22px; bottom: 18px; color: var(--blue); font-family: var(--mono); font-size: 13px; }
.tool-dial { display: none; }
.empty-filter { display: none; padding: 60px 24px; text-align: center; border: 1px solid var(--line); }
.empty-filter.is-visible { display: block; }
.empty-filter h2 { margin-bottom: 10px; font-size: 34px; font-weight: 350; }
.empty-filter p { margin-bottom: 0; color: var(--muted); }

.calculator-shell {
  padding-top: 84px;
  display: grid;
  grid-template-columns: minmax(390px, .82fr) minmax(520px, 1.18fr);
  align-items: stretch;
  gap: 14px;
}

.calculator-panel,
.calculator-result { min-height: 760px; padding: clamp(30px, 4vw, 60px); }
.calculator-panel { background: var(--white); border-top: 4px solid var(--blue); box-shadow: 0 24px 70px rgba(27, 55, 92, .08); }
.calculator-panel > h2 { margin-bottom: 16px; font-size: clamp(36px, 4vw, 62px); font-weight: 350; line-height: 1; letter-spacing: -.05em; }
.calculator-panel > p { max-width: 550px; margin-bottom: 48px; color: var(--muted); font-size: 14px; }
.form-field { margin: 0 0 38px; padding: 0; border: 0; }
.form-field legend, .range-value label { margin-bottom: 12px; display: block; font-size: 14px; font-weight: 500; }
.range-value { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; }
.range-value output { color: var(--blue); font-family: var(--mono); font-size: 13px; }
input[type="range"] { width: 100%; height: 28px; margin: 0 0 2px; appearance: none; border: 0; background: linear-gradient(90deg, var(--blue), var(--blue)) 0 50% / var(--range-fill, 40%) 4px no-repeat, linear-gradient(var(--control-line), var(--control-line)) 0 50% / 100% 4px no-repeat; cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { width: 24px; height: 24px; appearance: none; border: 5px solid var(--white); border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border: 5px solid var(--white); border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.range-bounds { display: flex; justify-content: space-between; color: var(--muted); font-family: var(--mono); font-size: 9px; }
.field-help { margin-top: 12px; display: block; color: var(--muted); font-size: 12px; line-height: 1.55; }
.segmented { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.segmented label { position: relative; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { min-height: 44px; padding: 0 10px; display: grid; place-items: center; border: 1px solid var(--control-line); font-family: var(--mono); font-size: 9px; cursor: pointer; transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease; }
.segmented label:active span { transform: scale(.98); }
.segmented input:checked + span { color: var(--white); background: var(--blue); border-color: var(--blue); }
.segmented input:focus-visible + span { outline: 3px solid var(--blue); outline-offset: 3px; }
.check-row { display: grid; grid-template-columns: 22px 1fr; align-items: start; gap: 12px; cursor: pointer; }
.check-row input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--blue); box-shadow: 0 0 0 1px var(--control-line); }
.check-row span { font-size: 14px; line-height: 1.5; }

.calculator-result {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 73% 30%, rgba(31, 94, 255, .52), transparent 31%),
    var(--ink);
}

.calculator-result::before { content: ""; position: absolute; inset: 16px; pointer-events: none; border: 1px solid rgba(255, 255, 255, .14); }
.result-head { position: relative; z-index: 2; display: flex; justify-content: space-between; gap: 20px; }
.result-head .section-number { color: #a9c1ff; }
.result-confidence { color: rgba(255, 255, 255, .72); }
.result-confidence i { width: 6px; height: 6px; margin-right: 8px; display: inline-block; background: #a9c1ff; transform: rotate(45deg); }
.wrist-visual { position: relative; height: 330px; margin: 12px 0 22px; display: grid; place-items: center; }
.wrist-shape { position: absolute; width: min(92%, 620px); height: calc(118px * var(--wrist-scale, 1)); border: 1px solid rgba(255, 255, 255, .22); border-radius: 50%; background: rgba(255, 255, 255, .05); transform: rotate(-8deg); }
.result-watch { position: relative; width: calc(176px * var(--watch-scale, 1)); max-width: 250px; aspect-ratio: 1; overflow: hidden; border: 8px solid rgba(255, 255, 255, .9); border-radius: 50%; box-shadow: 0 22px 50px rgba(0, 0, 0, .35); transition: width .55s var(--ease); }
.result-watch img { width: 100%; height: 100%; object-fit: cover; object-position: 77% 49%; transform: scale(2.1); }
.result-primary { position: relative; z-index: 2; display: grid; grid-template-columns: .6fr 1fr; align-items: end; gap: 34px; }
.diameter-output { display: flex; align-items: end; gap: 14px; }
.diameter-output strong { font-family: var(--mono); font-size: clamp(70px, 8vw, 124px); font-weight: 400; line-height: .78; letter-spacing: -.09em; }
.diameter-output span { color: #a9c1ff; font-family: var(--mono); font-size: 10px; line-height: 1.35; text-transform: uppercase; }
.result-summary { margin-bottom: 0; color: rgba(255, 255, 255, .74); font-size: 14px; }
.result-summary strong { color: var(--white); }
.result-specs { position: relative; z-index: 2; margin: 36px 0 28px; display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid rgba(255, 255, 255, .18); }
.result-specs div { padding: 18px 14px 18px 0; }
.result-specs div + div { padding-left: 18px; border-left: 1px solid rgba(255, 255, 255, .18); }
.result-specs dt { min-height: 34px; color: rgba(255, 255, 255, .5); font-size: 10px; line-height: 1.35; }
.result-specs dd { margin: 8px 0 0; font-family: var(--mono); font-size: 14px; }
.result-note { position: relative; z-index: 2; margin-bottom: 0; color: rgba(255, 255, 255, .55); font-size: 11px; line-height: 1.6; }

.calculator-explainer { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(50px, 8vw, 120px); }
.explainer-copy { position: sticky; top: 120px; align-self: start; }
.explainer-copy .section-number { margin-bottom: 28px; }
.explainer-copy h2 { margin-bottom: 28px; }
.explainer-list { border-top: 1px solid var(--line); }
.explainer-item { padding: 34px 0; display: grid; grid-template-columns: 80px 1fr; gap: 24px; border-bottom: 1px solid var(--line); }
.explainer-item > strong { color: var(--blue); font-family: var(--mono); font-size: 32px; font-weight: 400; }
.explainer-item h3 { margin-bottom: 8px; font-size: 24px; font-weight: 450; letter-spacing: -.03em; }
.explainer-item p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

/* Коммерческие редакционные страницы */
.article-hero { min-height: min(82dvh, 850px); }
.article-hero .inner-heading h1 { font-size: clamp(48px, 5.3vw, 88px); }
.article-layout {
  padding-top: clamp(76px, 8vw, 118px);
  display: grid;
  grid-template-columns: minmax(220px, .34fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(48px, 7vw, 112px);
}
.article-rail { position: sticky; top: 104px; padding-top: 24px; border-top: 4px solid var(--blue); }
.article-rail .section-number { margin-bottom: 28px; }
.article-rail ol { margin: 0 0 32px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.article-rail li { padding: 17px 0; display: grid; grid-template-columns: 34px 1fr; gap: 12px; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 12px; line-height: 1.5; }
.article-rail li span { color: var(--blue); font-family: var(--mono); font-size: 9px; }
.article-rail .button { width: 100%; padding-inline: 16px; text-align: center; }
.article-content { min-width: 0; }
.quick-verdict { margin-bottom: clamp(82px, 9vw, 130px); padding: clamp(32px, 4.5vw, 64px); color: var(--white); background: var(--ink); box-shadow: 0 30px 80px rgba(7, 24, 46, .15); }
.quick-verdict .section-number { margin-bottom: 24px; color: #a9c1ff; }
.quick-verdict h2,
.article-section > h2 { margin-bottom: 30px; font-size: clamp(38px, 4.6vw, 68px); font-weight: 350; line-height: .98; letter-spacing: -.055em; }
.verdict-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid rgba(255, 255, 255, .2); }
.verdict-grid > div { padding: 26px 24px 10px 0; }
.verdict-grid > div:nth-child(even) { padding-left: 26px; border-left: 1px solid rgba(255, 255, 255, .2); }
.verdict-grid > div:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, .2); }
.verdict-grid strong { display: block; margin-bottom: 10px; font-size: 16px; font-weight: 500; }
.verdict-grid p { margin-bottom: 0; color: rgba(255, 255, 255, .68); font-size: 13px; line-height: 1.7; }
.article-section { margin-bottom: clamp(88px, 10vw, 150px); }
.article-section > .section-number { margin-bottom: 24px; }
.article-section > p { max-width: 850px; color: #40536a; font-size: 16px; line-height: 1.82; }
.article-section > p + p { margin-top: -10px; }
.price-map { margin: 46px 0 34px; display: grid; grid-template-columns: .8fr 1.25fr 1fr; border-block: 1px solid var(--line); }
.price-map > div { min-height: 250px; padding: 28px 24px; }
.price-map > div + div { border-left: 1px solid var(--line); }
.price-map > div:nth-child(2) { color: var(--white); background: var(--blue); transform: translateY(-14px); box-shadow: 0 24px 54px rgba(31, 94, 255, .18); }
.price-map span { display: block; margin-bottom: 38px; color: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.price-map > div:nth-child(2) span { color: var(--white); }
.price-map strong { display: block; margin-bottom: 14px; font-size: 20px; font-weight: 500; line-height: 1.25; }
.price-map p { margin-bottom: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.price-map > div:nth-child(2) p { color: var(--white); }
.article-note { margin-top: 30px; padding: 22px 24px; border-left: 4px solid var(--blue); background: var(--white); box-shadow: 0 16px 45px rgba(28, 57, 95, .06); font-size: 13px !important; }
.article-note strong { color: var(--ink); }
.criteria-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.criteria-grid section { min-height: 270px; padding: 30px 30px 26px 0; border-bottom: 1px solid var(--line); }
.criteria-grid section:nth-child(even) { padding-left: 30px; border-left: 1px solid var(--line); }
.criteria-grid span,
.model-notes article > span { display: block; margin-bottom: 30px; color: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.criteria-grid h3 { margin-bottom: 10px; font-size: 25px; font-weight: 450; letter-spacing: -.03em; }
.criteria-grid p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.72; }
.comparison-wrap { width: 100%; margin: 42px 0 26px; overflow-x: auto; border: 1px solid var(--line); background: var(--white); box-shadow: 0 22px 60px rgba(28, 57, 95, .07); }
.comparison-wrap:focus-visible { outline-offset: 3px; }
.comparison-table { width: 100%; min-width: 960px; border-collapse: collapse; font-size: 12px; }
.comparison-table th,
.comparison-table td { padding: 17px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table thead th { color: var(--white); background: var(--ink); font-family: var(--mono); font-size: 9px; font-weight: 500; letter-spacing: .05em; text-transform: uppercase; }
.comparison-table tbody th { color: var(--ink); font-weight: 550; }
.comparison-table tbody tr:last-child th,
.comparison-table tbody tr:last-child td { border-bottom: 0; }
.comparison-table tbody tr:hover { background: var(--blue-soft); }
.model-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.model-notes article { min-height: 360px; padding: clamp(28px, 3vw, 42px); background: var(--white); border-top: 4px solid var(--ink); box-shadow: 0 18px 50px rgba(28, 57, 95, .07); }
.model-notes article:nth-child(2),
.model-notes article:nth-child(3) { border-color: var(--blue); }
.model-notes article > span { margin-bottom: 48px; }
.model-notes h3 { margin-bottom: 18px; font-size: 28px; font-weight: 400; line-height: 1.08; letter-spacing: -.035em; }
.model-notes p { color: var(--muted); font-size: 13px; line-height: 1.72; }
.model-notes p:last-child { margin-bottom: 0; }
.article-section--dark { padding: clamp(36px, 5vw, 68px); color: var(--white); background: var(--ink); }
.article-section--dark .section-number { color: #a9c1ff; }
.avoid-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255, 255, 255, .18); }
.avoid-list li { padding: 22px 0; display: grid; grid-template-columns: minmax(210px, .7fr) 1.3fr; gap: 32px; border-bottom: 1px solid rgba(255, 255, 255, .18); }
.avoid-list strong { font-size: 14px; font-weight: 500; }
.avoid-list span { color: rgba(255, 255, 255, .65); font-size: 13px; line-height: 1.65; }
.buy-checklist { margin: 40px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.buy-checklist li { padding: 28px 0; display: grid; grid-template-columns: 70px 1fr; gap: 28px; border-bottom: 1px solid var(--line); }
.buy-checklist li > span { color: var(--blue); font-family: var(--mono); font-size: 28px; }
.buy-checklist h3 { margin-bottom: 8px; font-size: 22px; font-weight: 450; letter-spacing: -.025em; }
.buy-checklist p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.article-actions { margin-top: 38px; display: flex; align-items: center; flex-wrap: wrap; gap: 28px; }
.article-actions .button { width: auto; }
.faq-section details { border-top: 1px solid var(--line); }
.faq-section details:last-child { border-bottom: 1px solid var(--line); }
.faq-section summary { min-height: 76px; padding: 22px 50px 22px 0; display: flex; align-items: center; position: relative; cursor: pointer; font-size: 16px; font-weight: 500; list-style: none; }
.faq-section summary::-webkit-details-marker { display: none; }
.faq-section summary::after { content: "+"; position: absolute; right: 4px; color: var(--blue); font-family: var(--mono); font-size: 22px; font-weight: 400; }
.faq-section details[open] summary::after { content: "−"; }
.faq-section details p { max-width: 780px; padding: 0 54px 26px 0; color: var(--muted); font-size: 13px; line-height: 1.72; }
.article-sources { padding-top: 34px; border-top: 4px solid var(--blue); }
.article-sources h2 { margin-bottom: 12px; font-size: 24px; font-weight: 450; }
.article-sources p,
.article-sources li { color: var(--muted); font-size: 11px; line-height: 1.65; }
.article-sources ul { margin: 18px 0 0; padding-left: 18px; }
.article-sources a { border-bottom: 1px solid var(--line); }
.article-sources a:hover { color: var(--blue); border-color: var(--blue); }

.reveal { opacity: 1; transform: none; }
.js-ready .reveal { opacity: 0; transform: translate3d(0, 24px, 0); transition: opacity .85s var(--ease), transform .85s var(--ease); }
.js-ready .reveal.is-visible { opacity: 1; transform: translate3d(0, 0, 0); }

@media (max-width: 1180px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { display: none; }
  .header-action { margin-right: 68px; }
  .menu-toggle {
    position: absolute;
    right: 24px;
    width: 44px;
    height: 44px;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    background: var(--white);
    cursor: pointer;
  }
  .menu-toggle-lines { width: 18px; display: grid; gap: 5px; }
  .menu-toggle-lines i { height: 1px; background: currentColor; transition: transform .3s var(--ease); }
  .menu-toggle[aria-expanded="true"] .menu-toggle-lines i:first-child { transform: translateY(3px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-toggle-lines i:last-child { transform: translateY(-3px) rotate(-45deg); }
  .site-nav.is-open {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    min-height: calc(100dvh - var(--header-h));
    padding: 50px 24px;
    display: grid;
    align-content: start;
    gap: 0;
    color: var(--white);
    background: var(--ink);
  }
  .site-nav.is-open a { padding: 22px 0; font-size: 15px; border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .hero { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 32px; }
  .hero-copy { padding-left: 18px; }
  .section-intro { grid-template-columns: .4fr 1fr; }
  .section-intro > p:last-child { grid-column: 2; }
  .route-main { grid-column: 1 / 8; }
  .route-calculator { grid-column: 8 / 13; }
  .route-service { grid-column: 8 / 13; }
  .route-auth { grid-column: 1 / 8; grid-row: 3; }
  .method { grid-template-columns: 1fr 1fr; gap: 50px; }
  .editorial-feature { grid-template-columns: 1fr .34fr .75fr; }
  .hero-inner { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 30px; }
  .purchase-selector { grid-template-columns: 1fr 1.12fr; }
  .selector-intro { grid-column: 1 / -1; max-width: 760px; padding-bottom: 38px; }
  .filter-bar { grid-template-columns: auto 1fr auto 1fr; }
  .filter-status { grid-column: 1 / -1; justify-self: end; }
  .calculator-shell { grid-template-columns: .88fr 1.12fr; }
}

@media (max-width: 900px) {
  :root { --header-h: 72px; }
  .hero {
    min-height: auto;
    padding: calc(var(--header-h) + 42px) 24px 34px;
    grid-template-columns: 1fr;
    gap: 44px;
    background: var(--paper);
  }
  .hero::before { left: 24px; top: calc(var(--header-h) + 34px); bottom: auto; height: 150px; }
  .hero-copy { max-width: 760px; padding: 24px 0 0 24px; }
  .hero-copy, .hero-media, .hero-principles { grid-column: 1; grid-row: auto; }
  .hero-media { min-height: 62vw; }
  .hero-principles { width: 100%; margin: 0; }
  .scroll-cue { display: none; }
  .section-intro { grid-template-columns: 1fr; }
  .section-intro > p:last-child { grid-column: auto; max-width: 570px; }
  .routes-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-rows: 340px; }
  .route-main, .route-calculator, .route-service, .route-auth { grid-column: auto; grid-row: auto; }
  .route-main { grid-row: span 2; }
  .method { grid-template-columns: 1fr; }
  .method-visual { min-height: 72vw; }
  .editorial-head { grid-template-columns: 1fr; }
  .editorial-feature { min-height: 720px; grid-template-columns: .55fr 1fr; }
  .feature-number { grid-column: 1; }
  .feature-copy { grid-column: 2; }
  .editorial-feature::after { background: linear-gradient(180deg, rgba(7, 24, 46, .05) 30%, rgba(7, 24, 46, .97) 74%); }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-note { grid-column: 1 / -1; }
  .hero-inner { min-height: auto; grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .breadcrumb { grid-row: 1; }
  .inner-heading { grid-column: 1; grid-row: 2; }
  .inner-hero-media { grid-column: 1; grid-row: 3; min-height: 62vw; }
  .purchase-selector { grid-template-columns: 1fr; }
  .selector-intro { grid-column: auto; padding-right: 0; }
  .selector-result { min-height: 620px; }
  .filter-bar { grid-template-columns: auto 1fr; }
  .filter-status { grid-column: 1 / -1; }
  .guide-card:nth-child(n) { grid-column: span 6; }
  .guide-card:nth-child(1), .guide-card:nth-child(6) { grid-column: 1 / -1; }
  .calculator-shell { grid-template-columns: 1fr; }
  .calculator-panel, .calculator-result { min-height: auto; }
  .calculator-explainer { grid-template-columns: 1fr; }
  .explainer-copy { position: static; }
  .article-layout { grid-template-columns: 1fr; }
  .article-rail { position: static; display: grid; grid-template-columns: 1fr auto; gap: 22px 30px; }
  .article-rail .section-number { grid-column: 1 / -1; margin-bottom: 0; }
  .article-rail ol { margin-bottom: 0; }
  .article-rail .button { align-self: end; width: auto; }
}

@media (max-width: 820px) {
  .decision-strip { min-height: auto; padding: 46px 24px; grid-template-columns: 1fr; gap: 22px; }
  .decision-strip .button { width: 100%; justify-content: center; }
}

@media (max-width: 640px) {
  :root { --header-h: 66px; }
  body { background-size: 100% 48px; }
  .site-header { padding: 0 15px; }
  .site-header.is-scrolled { height: 62px; }
  .brand { gap: 9px; }
  .brand-mark { width: 34px; height: 34px; flex-basis: 34px; }
  .brand-name { font-size: 10px; }
  .header-action { display: none; }
  .menu-toggle { right: 14px; width: 44px; height: 44px; }
  .hero { padding-inline: 15px; }
  .hero::before { left: 15px; }
  .hero-copy { padding-left: 18px; }
  .eyebrow { align-items: flex-start; flex-direction: column; gap: 7px; margin-bottom: 24px; }
  .hero h1 { margin-bottom: 24px; font-size: clamp(49px, 15vw, 72px); }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 18px; }
  .button { width: 100%; }
  .text-link { align-self: flex-start; }
  .hero-principles { grid-template-columns: 1fr; }
  .hero-principles div { padding: 13px 0; display: grid; grid-template-columns: 36px 1fr; align-items: center; border-bottom: 1px solid var(--line); }
  .hero-principles div + div { padding-left: 0; border-left: 0; }
  .hero-principles dd { margin: 0; }
  .hero-media { min-height: 116vw; }
  .hero-media img { object-position: 57% center; }
  .ticker-track { gap: 20px; }
  .section-shell { padding: 82px 15px; }
  .section-intro { margin-bottom: 42px; }
  .section-intro h2, .method-copy h2, .editorial-head h2, .explainer-copy h2 { font-size: clamp(39px, 12vw, 56px); }
  .routes-grid { grid-template-columns: 1fr; grid-auto-rows: auto; gap: 10px; }
  .route { min-height: 360px; }
  .route-main { grid-row: auto; min-height: 480px; }
  .route h3, .route-service h3, .route-auth h3 { font-size: 31px; }
  .method { gap: 42px; }
  .method-visual { min-height: 126vw; }
  .method-visual img { object-position: 42% center; }
  .method-lead { font-size: 15px; }
  .editorial { padding-top: 0; }
  .editorial-feature { min-height: 760px; padding: 0 22px 28px; display: flex; flex-direction: column; justify-content: flex-end; }
  .editorial-feature::after { background: linear-gradient(180deg, rgba(7, 24, 46, .04) 22%, rgba(7, 24, 46, .98) 64%); }
  .editorial-media img { object-position: 62% center; }
  .feature-number { position: relative; left: auto; bottom: auto; margin-bottom: 28px; padding: 0; }
  .feature-copy { position: relative; left: auto; right: auto; bottom: auto; padding: 0; }
  .feature-copy h3 { font-size: 26px; }
  .decision-strip { min-height: auto; padding: 46px 20px; grid-template-columns: 1fr; gap: 22px; }
  .decision-strip-copy h2 { font-size: 36px; }
  .decision-strip .button { width: 100%; justify-content: center; }
  .site-footer { padding: 58px 20px 28px; grid-template-columns: 1fr; }
  .footer-note { grid-column: auto; }
  .footer-copy { margin-top: 8px; }
  .hero-inner { padding: calc(var(--header-h) + 42px) 15px 28px; gap: 30px; }
  .inner-heading { padding-left: 18px; }
  .inner-heading h1 { font-size: clamp(48px, 14vw, 68px); }
  .inner-heading > p:last-child { font-size: 15px; }
  .inner-hero-media { min-height: 112vw; }
  .category-page .inner-hero-media img { object-position: 56% center; }
  .calculator-page .inner-hero-media img { object-position: 60% center; }
  .purchase-selector { padding-top: 64px; gap: 10px; }
  .selector-intro { padding-block: 0 30px; }
  .selector-intro h2 { font-size: 44px; }
  .selector-form, .selector-result { padding: 30px 20px; }
  .selector-options--three { grid-template-columns: 1fr; }
  .selector-result { min-height: auto; }
  .selector-result-head { margin-bottom: 54px; }
  .selector-result h3 { font-size: 38px; }
  .selector-specs div { grid-template-columns: 1fr; gap: 6px; }
  .selector-result .button { width: 100%; justify-content: center; text-align: center; }
  .category-tools { padding-top: 56px; }
  .filter-bar { padding: 20px 16px; grid-template-columns: 1fr; gap: 12px; }
  .filter-status { grid-column: auto; justify-self: start; margin-top: 8px; }
  .filter-group { width: 100%; }
  .filter-chip { flex: 1 1 auto; }
  .category-grid { grid-template-columns: 1fr; }
  .guide-card:nth-child(n) { grid-column: 1; min-height: 450px; }
  .guide-media { height: 210px; }
  .calculator-shell { padding-top: 58px; gap: 10px; }
  .calculator-panel, .calculator-result { padding: 30px 20px; }
  .calculator-panel > h2 { font-size: 44px; }
  .segmented { grid-template-columns: 1fr; }
  .wrist-visual { height: 270px; }
  .result-primary { grid-template-columns: 1fr; gap: 24px; }
  .diameter-output strong { font-size: 90px; }
  .result-specs { grid-template-columns: 1fr; }
  .result-specs div { padding: 14px 0; }
  .result-specs div + div { padding-left: 0; border-top: 1px solid rgba(255, 255, 255, .18); border-left: 0; }
  .result-specs dt { min-height: 0; }
  .explainer-item { grid-template-columns: 52px 1fr; gap: 14px; }
  .article-hero .inner-heading h1 { font-size: clamp(46px, 13vw, 66px); }
  .article-layout { padding-top: 64px; gap: 68px; }
  .article-rail { grid-template-columns: 1fr; }
  .article-rail .button { width: 100%; }
  .quick-verdict { margin-inline: -15px; padding: 34px 20px; }
  .quick-verdict h2,
  .article-section > h2 { font-size: clamp(38px, 11vw, 52px); }
  .verdict-grid { grid-template-columns: 1fr; }
  .verdict-grid > div,
  .verdict-grid > div:nth-child(even) { padding: 22px 0; border-left: 0; border-top: 1px solid rgba(255, 255, 255, .2); }
  .verdict-grid > div:first-child { border-top: 0; }
  .price-map { grid-template-columns: 1fr; }
  .price-map > div { min-height: auto; padding: 26px 20px; }
  .price-map > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .price-map > div:nth-child(2) { transform: none; }
  .price-map span { margin-bottom: 22px; }
  .criteria-grid { grid-template-columns: 1fr; }
  .criteria-grid section,
  .criteria-grid section:nth-child(even) { min-height: auto; padding: 26px 0; border-left: 0; }
  .model-notes { grid-template-columns: 1fr; }
  .model-notes article { min-height: auto; padding: 28px 22px; }
  .model-notes article > span { margin-bottom: 34px; }
  .article-section--dark { margin-inline: -15px; padding: 38px 20px; }
  .avoid-list li { grid-template-columns: 1fr; gap: 8px; }
  .buy-checklist li { grid-template-columns: 48px 1fr; gap: 14px; }
  .buy-checklist li > span { font-size: 22px; }
  .article-actions { align-items: stretch; flex-direction: column; }
  .article-actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .hero-media img, .inner-hero-media img { transform: scale(1.02); }
}