:root {
  --black: #0b0d10;
  --ink: #181b20;
  --muted: #606874;
  --line: #d9dde3;
  --soft: #f3f4f6;
  --blue: #125fbd;
  --blue-dark: #0d4c98;
  --blue-soft: #eaf3ff;
  --orange: #ed721c;
  --white: #ffffff;
  --success: #138445;
  --max: 1240px;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --shadow-sm: 0 12px 34px rgba(24, 27, 32, 0.08);
  --shadow-lg: 0 28px 70px rgba(9, 20, 34, 0.17);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(18, 95, 189, 0.55);
  outline-offset: 3px;
}

section[id] {
  scroll-margin-top: 92px;
}

.anchor-target {
  position: absolute;
  top: -92px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--black);
  border-radius: 8px;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

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

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  line-height: 1.35;
  text-transform: uppercase;
}

.eyebrow-light {
  color: #8dc3ff;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", Inter, sans-serif;
  letter-spacing: -0.035em;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(3rem, 6.2vw, 5.9rem);
  font-weight: 700;
  line-height: 0.96;
  text-wrap: balance;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2.2rem, 4.1vw, 4.5rem);
  font-weight: 650;
  line-height: 1;
  text-wrap: balance;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.35rem;
  line-height: 1.18;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.91rem;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 10px 25px rgba(18, 95, 189, 0.25);
}

.button-primary:hover {
  background: var(--blue-dark);
}

.button-secondary {
  color: var(--black);
  border-color: #bcc3cc;
  background: var(--white);
}

.button-secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.button-dark {
  color: var(--white);
  background: var(--black);
}

.button-dark:hover {
  background: var(--blue);
}

.button-white {
  color: var(--blue-dark);
  background: var(--white);
}

.button-outline-light {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
  background: transparent;
}

.button-outline-light:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.button-block {
  width: 100%;
}

.text-link {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 9px;
  color: var(--blue);
  font-weight: 800;
}

.text-link span {
  transition: transform 160ms ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.text-link-light {
  color: #a9d2ff;
}

/* Header */

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.scrolled {
  border-color: rgba(217, 221, 227, 0.85);
  box-shadow: 0 12px 32px rgba(17, 24, 39, 0.06);
}

.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  gap: 22px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1.2rem;
  font-weight: 760;
  letter-spacing: -0.045em;
}

.brand em {
  color: var(--blue);
  font-style: normal;
}

.brand-mark {
  display: inline-grid;
  width: 31px;
  height: 31px;
  place-items: center;
  color: var(--white);
  background: var(--black);
  border-radius: 9px;
  font-size: 1.22rem;
  line-height: 1;
}

.primary-nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
}

.primary-nav > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 10px 11px;
  color: #464d57;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 700;
}

.primary-nav > a:hover,
.primary-nav > a:focus-visible {
  color: var(--blue);
  background: var(--blue-soft);
}

.language-switcher,
.footer-language {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.language-switcher a,
.footer-language a {
  display: inline-grid;
  min-width: 36px;
  min-height: 44px;
  place-items: center;
  opacity: 0.52;
}

.language-switcher a:hover,
.language-switcher a:focus-visible,
.language-switcher a[aria-current="page"],
.footer-language a:hover,
.footer-language a[aria-current="page"] {
  opacity: 1;
}

.language-switcher a[aria-current="page"] {
  color: var(--blue);
}

.nav-quote {
  display: inline-flex;
  min-height: 44px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 10px 17px;
  color: var(--white);
  background: var(--black);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.nav-quote:hover {
  background: var(--blue);
}

.nav-toggle,
.nav-close,
.nav-backdrop,
.mobile-nav-head,
.mobile-only {
  display: none;
}

.primary-nav > .mobile-only {
  display: none;
}

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 8vw, 112px) 0 76px;
  background:
    radial-gradient(circle at 89% 8%, rgba(18, 95, 189, 0.12), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7f9fb 100%);
}

.hero::before {
  position: absolute;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(18, 95, 189, 0.1);
  border-radius: 50%;
  content: "";
  right: -280px;
  bottom: -300px;
}

.hero-grid {
  position: relative;
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 0.91fr) minmax(420px, 1.09fr);
  gap: clamp(46px, 6vw, 88px);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 30px;
  color: #525c68;
  font-size: clamp(1.05rem, 1.45vw, 1.25rem);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.hero-facts {
  display: grid;
  max-width: 680px;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-facts li {
  padding: 16px 14px 16px 0;
}

.hero-facts li + li {
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

.hero-facts strong,
.hero-facts span {
  display: block;
}

.hero-facts strong {
  color: var(--black);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1rem;
  line-height: 1.2;
}

.hero-facts span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.4;
}

.scope-note {
  max-width: 670px;
  margin: 18px 0 0;
  padding-left: 14px;
  color: #626c78;
  border-left: 3px solid #a8c9ef;
  font-size: 0.75rem;
  line-height: 1.55;
}

.hero-media {
  position: relative;
  margin: 0;
  padding: 13px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: rotate(1.1deg);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 9px);
}

.hero-media figcaption {
  position: absolute;
  right: 28px;
  bottom: 26px;
  left: 28px;
  padding: 15px 17px;
  color: var(--white);
  background: rgba(7, 11, 17, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 13px;
  backdrop-filter: blur(10px);
  font-size: 0.78rem;
  line-height: 1.5;
}

.proof-strip {
  color: var(--white);
  background: var(--black);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.proof-grid > div {
  min-height: 106px;
  padding: 25px clamp(15px, 2.5vw, 34px);
}

.proof-grid > div + div {
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.proof-grid strong,
.proof-grid span {
  display: block;
}

.proof-grid strong {
  margin-bottom: 5px;
  color: #8dc3ff;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1.03rem;
}

.proof-grid span {
  color: #aeb8c3;
  font-size: 0.78rem;
}

/* Shared sections */

.section {
  position: relative;
  padding: clamp(82px, 9vw, 132px) 0;
}

.soft-section {
  background: var(--soft);
}

.section-heading {
  margin-bottom: clamp(42px, 6vw, 70px);
}

.section-heading h2 {
  margin-bottom: 0;
}

.split-heading {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.65fr);
  gap: 60px;
}

.split-heading > p,
.centered-heading > p {
  margin-bottom: 0;
  color: var(--muted);
}

.centered-heading {
  max-width: 850px;
  margin-inline: auto;
  text-align: center;
}

.centered-heading h2 {
  margin-bottom: 20px;
}

.compact-heading {
  max-width: 730px;
}

/* Feature cards */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.feature-card-wide {
  display: grid;
  grid-column: span 3;
  grid-template-rows: auto 1fr;
}

.feature-card-wide .feature-copy {
  padding: 30px 30px 24px;
}

.feature-card-wide img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-top: 1px solid var(--line);
}

.card-index {
  display: inline-grid;
  width: 36px;
  height: 36px;
  margin-bottom: 20px;
  place-items: center;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 900;
}

.feature-card p,
.compact-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.compact-card {
  grid-column: span 2;
  padding: 28px;
}

.feature-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  margin-bottom: 24px;
  place-items: center;
  color: var(--white);
  background: var(--blue);
  border-radius: 14px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
}

/* PDU alternative */

.dark-section {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 84% 18%, rgba(18, 95, 189, 0.46), transparent 34%),
    var(--black);
}

.dark-section::after {
  position: absolute;
  width: 560px;
  height: 560px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 50%;
  content: "";
  right: -180px;
  bottom: -350px;
}

.dark-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(60px, 8vw, 110px);
}

.dark-intro {
  align-self: center;
}

.dark-intro p:not(.eyebrow) {
  color: #aeb8c3;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.advantage-grid article {
  min-height: 220px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius-md);
}

.advantage-grid article > span {
  display: block;
  margin-bottom: 34px;
  color: #78b8ff;
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.advantage-grid h3 {
  color: var(--white);
}

.advantage-grid p {
  margin-bottom: 0;
  color: #aeb8c3;
  font-size: 0.86rem;
}

/* Product cards */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.product-card {
  display: flex;
  overflow: hidden;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.product-image {
  display: block;
  overflow: hidden;
  padding: 10px;
  background: #f7f8fa;
  border-bottom: 1px solid var(--line);
}

.product-image img {
  width: 100%;
  aspect-ratio: 1.46 / 1;
  object-fit: cover;
  border-radius: 13px;
  transition: transform 300ms ease;
}

.product-image:hover img {
  transform: scale(1.025);
}

.product-copy {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  padding: 28px;
}

.model-tag {
  align-self: flex-start;
  margin-bottom: 16px;
  padding: 6px 9px;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 7px;
  font-size: 0.67rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-copy h3 a:hover {
  color: var(--blue);
}

.product-copy p {
  color: var(--muted);
  font-size: 0.9rem;
}

.product-copy ul {
  margin: auto 0 24px;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.product-copy li {
  position: relative;
  padding-left: 18px;
  color: #4f5864;
  font-size: 0.78rem;
}

.product-copy li + li {
  margin-top: 8px;
}

.product-copy li::before {
  position: absolute;
  top: 0.65em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  content: "";
}

/* Control */

.control-grid {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(55px, 8vw, 110px);
}

.control-visual {
  position: relative;
  overflow: hidden;
  max-width: 560px;
  margin-inline: auto;
  padding: 18px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.control-visual::after {
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: calc(var(--radius-lg) - 10px);
  content: "";
  pointer-events: none;
}

.control-visual img {
  width: 100%;
  border-radius: calc(var(--radius-lg) - 10px);
}

.step-list {
  margin: 36px 0;
  padding: 0;
  list-style: none;
}

.step-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.step-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.step-list li > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 10px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 0.8rem;
  font-weight: 900;
}

.step-list h3 {
  margin-bottom: 5px;
  font-size: 1.05rem;
}

.step-list p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.87rem;
}

.control-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

/* Specifications */

.specs-grid {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 0.68fr) minmax(0, 1.32fr);
  gap: clamp(50px, 7vw, 100px);
}

.specs-intro {
  position: sticky;
  top: 120px;
}

.specs-intro > p:not(.eyebrow) {
  color: var(--muted);
}

.spec-table {
  border-top: 1px solid var(--black);
}

.spec-table > div {
  display: grid;
  align-items: start;
  padding: 22px 0;
  grid-template-columns: minmax(180px, 0.62fr) minmax(0, 1.38fr);
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.spec-table span {
  color: var(--muted);
  font-size: 0.82rem;
}

.spec-table strong {
  color: var(--black);
  font-size: 0.92rem;
}

.evidence-card {
  display: grid;
  align-items: center;
  margin-top: 70px;
  padding: 34px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 30px;
  background: #f7f9fc;
  border: 1px solid #dce5ef;
  border-radius: var(--radius-md);
}

.evidence-number {
  min-width: 145px;
  color: var(--blue);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
}

.evidence-card h3 {
  margin-bottom: 7px;
}

.evidence-card p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* Use cases */

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 17px;
}

.use-case-card {
  min-height: 230px;
  padding: 27px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.use-case-card > span,
.use-case-card > div > span {
  display: block;
  margin-bottom: 35px;
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.use-case-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.use-case-featured {
  display: grid;
  overflow: hidden;
  min-height: 360px;
  padding: 0;
  grid-column: span 2;
  grid-row: span 2;
  grid-template-rows: minmax(220px, 1fr) auto;
}

.use-case-featured img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.use-case-featured > div {
  padding: 28px;
}

.use-case-featured > div > span {
  margin-bottom: 12px;
}

/* Calculator */

.calculator-section {
  color: var(--white);
  background:
    radial-gradient(circle at 13% 22%, rgba(120, 184, 255, 0.33), transparent 30%),
    linear-gradient(135deg, #0b3263, #125fbd 64%, #0d4c98);
}

.calculator-grid {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 0.74fr) minmax(420px, 1.26fr);
  gap: clamp(50px, 8vw, 110px);
}

.calculator-grid > div > p:not(.eyebrow) {
  color: #d8e9fc;
}

.energy-form {
  padding: clamp(26px, 4vw, 42px);
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.field-grid {
  display: grid;
  margin-bottom: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 17px;
}

.field-grid label {
  color: #444c56;
  font-size: 0.76rem;
  font-weight: 800;
}

.field-grid input {
  width: 100%;
  min-height: 48px;
  margin-top: 7px;
  padding: 10px 13px;
  color: var(--black);
  background: #f8fafc;
  border: 1px solid #cdd4dc;
  border-radius: 11px;
}

.field-grid input:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(18, 95, 189, 0.13);
}

.energy-result {
  display: grid;
  margin-top: 25px;
  padding-top: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  border-top: 1px solid var(--line);
}

.energy-result strong,
.energy-result span {
  display: block;
}

.energy-result strong {
  color: var(--blue);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  letter-spacing: -0.04em;
}

.energy-result span {
  color: var(--muted);
  font-size: 0.72rem;
}

.form-note {
  margin: 18px 0 0;
  color: #707986;
  font-size: 0.7rem;
}

/* FAQ */

.faq-grid {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(260px, 0.58fr) minmax(0, 1.42fr);
  gap: clamp(55px, 8vw, 115px);
}

.faq-intro {
  position: sticky;
  top: 120px;
}

.faq-intro > p:not(.eyebrow) {
  color: var(--muted);
}

.faq-list {
  border-top: 1px solid var(--black);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 26px 52px 26px 0;
  cursor: pointer;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 4px;
  width: 31px;
  height: 31px;
  content: "+";
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 50%;
  font-family: Inter, sans-serif;
  font-size: 1.15rem;
  line-height: 31px;
  text-align: center;
  transform: translateY(-50%);
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 760px;
  margin: -4px 50px 25px 0;
  color: var(--muted);
}

/* Guides */

.guide-section {
  padding-top: 40px;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.guide-grid > a {
  display: block;
  min-height: 245px;
  padding: 27px;
  background: #f7f9fb;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.guide-grid > a:hover {
  border-color: #aac8eb;
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
}

.guide-grid span {
  display: block;
  margin-bottom: 34px;
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.guide-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* Final CTA and footer */

.final-cta {
  padding: 80px 0;
  color: var(--white);
  background: var(--blue);
}

.final-cta-inner {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 50px;
}

.final-cta h2 {
  max-width: 830px;
  margin-bottom: 14px;
  font-size: clamp(2.2rem, 4.5vw, 4.6rem);
}

.final-cta p:not(.eyebrow) {
  max-width: 760px;
  margin-bottom: 0;
  color: #dcecff;
}

.final-actions {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.site-footer {
  padding: 72px 0 26px;
  color: #c3cad2;
  background: var(--black);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.45fr repeat(3, minmax(0, 0.72fr));
  gap: 46px;
}

.footer-brand {
  margin-bottom: 18px;
  color: var(--white);
}

.footer-grid > div:first-child p {
  max-width: 330px;
  color: #89939f;
  font-size: 0.82rem;
}

.footer-grid h2 {
  margin-bottom: 16px;
  color: var(--white);
  font-family: Inter, sans-serif;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-grid > div:not(:first-child) a {
  display: block;
  min-height: 36px;
  padding: 5px 0;
  color: #9fa8b3;
  font-size: 0.8rem;
}

.footer-grid > div:not(:first-child) a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: #737e89;
  font-size: 0.7rem;
}

@media (max-width: 1100px) {
  .header-inner {
    gap: 13px;
  }

  .primary-nav > a {
    padding-inline: 8px;
    font-size: 0.78rem;
  }

  .desktop-quote {
    display: none;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 0.93fr) minmax(380px, 1.07fr);
    gap: 44px;
  }

  .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .site-header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .container {
    width: min(calc(100% - 32px), var(--max));
  }

  .header-inner {
    min-height: 70px;
  }

  .primary-nav {
    position: fixed;
    z-index: 102;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    width: min(88vw, 390px);
    padding: 18px 20px 28px;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 4px;
    color: var(--white);
    background: var(--black);
    box-shadow: -30px 0 60px rgba(0, 0, 0, 0.3);
    transform: translateX(105%);
    visibility: hidden;
    transition:
      transform 220ms ease,
      visibility 220ms step-end;
  }

  .primary-nav.open {
    transform: translateX(0);
    visibility: visible;
    transition:
      transform 220ms ease,
      visibility 0ms;
  }

  .primary-nav > a {
    min-height: 50px;
    justify-content: flex-start;
    padding: 12px 13px;
    color: #d6dce3;
    border-radius: 10px;
    font-size: 0.95rem;
  }

  .primary-nav > a:hover,
  .primary-nav > a:focus-visible {
    color: var(--white);
    background: rgba(255, 255, 255, 0.09);
  }

  .mobile-nav-head {
    display: flex;
    min-height: 58px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.13);
    font-family: "Space Grotesk", Inter, sans-serif;
    font-weight: 700;
  }

  .nav-close {
    display: inline-grid;
    width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    border: 0;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.75rem;
  }

  .primary-nav .mobile-only {
    display: inline-flex;
  }

  .primary-nav .nav-quote {
    justify-content: center;
    margin-top: 14px;
    color: var(--black);
    background: var(--white);
  }

  .nav-toggle {
    display: inline-flex;
    width: 46px;
    height: 46px;
    flex: 0 0 auto;
    padding: 12px 10px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 12px;
    cursor: pointer;
  }

  .nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--black);
    border-radius: 2px;
  }

  .nav-backdrop {
    position: fixed;
    z-index: 101;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    padding: 0;
    background: rgba(4, 7, 11, 0.64);
    border: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms ease;
  }

  .nav-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  .hero-grid,
  .dark-grid,
  .control-grid,
  .specs-grid,
  .calculator-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 58px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-media {
    transform: none;
  }

  .split-heading {
    align-items: start;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .dark-intro {
    max-width: 720px;
  }

  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-card:last-child {
    grid-column: 1 / -1;
    max-width: calc(50% - 10px);
    justify-self: center;
  }

  .control-visual {
    max-width: 520px;
  }

  .specs-intro,
  .faq-intro {
    position: static;
    max-width: 760px;
  }

  .evidence-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .evidence-card .text-link {
    grid-column: 2;
  }

  .use-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .use-case-featured {
    grid-row: auto;
  }

  .final-cta-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .final-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .footer-grid {
    grid-template-columns: 1.3fr repeat(2, minmax(0, 1fr));
  }

  .footer-grid > div:last-child {
    grid-column: 2;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(calc(100% - 24px), var(--max));
  }

  .brand {
    font-size: 1.06rem;
  }

  .brand-mark {
    width: 29px;
    height: 29px;
  }

  .header-inner {
    gap: 8px;
  }

  .language-switcher {
    margin-left: auto;
  }

  .language-switcher a {
    min-width: 32px;
  }

  h1 {
    font-size: clamp(2.8rem, 14vw, 4.45rem);
  }

  h2 {
    font-size: clamp(2.2rem, 10vw, 3.35rem);
  }

  .hero {
    padding: 48px 0 56px;
  }

  .hero-grid {
    gap: 38px;
  }

  .hero-actions,
  .final-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions .button,
  .final-actions .button {
    width: 100%;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .hero-facts li {
    padding: 14px 0;
  }

  .hero-facts li + li {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero-media {
    padding: 8px;
    border-radius: 20px;
  }

  .hero-media img {
    border-radius: 14px;
  }

  .hero-media figcaption {
    position: static;
    margin-top: 8px;
    padding: 12px;
    color: #4f5965;
    background: #f3f5f7;
    border: 0;
  }

  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-grid > div:nth-child(3) {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    border-left: 0;
  }

  .proof-grid > div:nth-child(4) {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }

  .section {
    padding: 78px 0;
  }

  .feature-grid,
  .product-grid,
  .advantage-grid,
  .use-case-grid,
  .guide-grid,
  .field-grid,
  .energy-result {
    grid-template-columns: 1fr;
  }

  .feature-card-wide,
  .compact-card,
  .use-case-featured {
    grid-column: auto;
  }

  .product-card:last-child {
    grid-column: auto;
    max-width: none;
  }

  .advantage-grid article {
    min-height: 190px;
  }

  .control-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .control-actions .button {
    width: 100%;
  }

  .spec-table > div {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .evidence-card {
    grid-template-columns: 1fr;
  }

  .evidence-card .text-link {
    grid-column: auto;
  }

  .calculator-grid {
    gap: 34px;
  }

  .faq-list summary {
    padding-right: 43px;
    font-size: 1.02rem;
  }

  .faq-list details p {
    margin-right: 0;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 25px;
  }

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }

  .footer-grid > div:last-child {
    grid-column: auto;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .brand-mark {
    display: none;
  }

  .language-switcher {
    font-size: 0.67rem;
  }

  .language-switcher a {
    min-width: 30px;
  }

  .nav-toggle {
    width: 44px;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .proof-grid > div + div,
  .proof-grid > div:nth-child(3) {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    border-left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid > div:first-child {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}