:root {
  --ink: #0f172a;
  --text: #43536a;
  --muted: #6b7a90;
  --white: #ffffff;
  --soft: #f5f7fb;
  --line: rgba(78, 96, 130, 0.18);
  --blue: #1457d9;
  --electric: #1e88ff;
  --purple: #7b36df;
  --green: #2f9e44;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.14);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  background: var(--soft);
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 54px);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.42);
  transition: box-shadow 180ms ease, padding 180ms ease;
}
.site-header.is-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.1);
}
.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 116px;
  height: auto;
  filter: drop-shadow(0 10px 18px rgba(15, 23, 42, 0.16));
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  font-weight: 800;
}
.site-nav a:hover { color: var(--blue); }
.nav-cta,
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 900;
}
.nav-cta {
  padding: 12px 18px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--purple));
}
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100vh;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 0.72fr);
  gap: 34px;
  align-items: center;
  padding: 138px max(22px, calc((100vw - var(--max)) / 2)) 78px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.96) 0%, rgba(255,255,255,0.86) 42%, rgba(255,255,255,0.34) 70%),
    url("../images/cubrem-max-hero.png") center right / cover no-repeat;
}
.hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 110px;
  content: "";
  background: linear-gradient(transparent, var(--soft));
  pointer-events: none;
}
.hero-copy,
.hero-card {
  position: relative;
  z-index: 2;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 780px;
  color: var(--ink);
  font-size: clamp(45px, 6.6vw, 82px);
  line-height: 0.94;
  letter-spacing: -2px;
}
h2 {
  color: var(--ink);
  font-size: clamp(34px, 4.8vw, 58px);
  line-height: 1;
  letter-spacing: -1px;
}
h3 {
  color: var(--ink);
  font-size: 22px;
}
p {
  line-height: 1.72;
}
.lead {
  max-width: 650px;
  color: var(--ink);
  font-size: 21px;
  font-weight: 800;
}
.hero-copy > p:not(.eyebrow):not(.lead) {
  max-width: 680px;
}
.hero-tags,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-tags {
  margin: 24px 0;
}
.hero-tags span {
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255,255,255,0.72);
  font-size: 13px;
  font-weight: 900;
}
.button {
  border: 1px solid transparent;
  padding: 13px 20px;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.button:hover {
  transform: translateY(-2px);
}
.button.primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 18px 40px rgba(20, 87, 217, 0.24);
}
.button.secondary {
  color: var(--ink);
  background: rgba(255,255,255,0.75);
  border-color: var(--line);
}
.button.light {
  color: var(--blue);
  background: var(--white);
}
.button.dark {
  color: var(--white);
  background: transparent;
  border-color: rgba(255,255,255,0.38);
}
.hero-card {
  justify-self: end;
  width: min(430px, 100%);
  padding: 18px;
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: 28px;
  background: rgba(255,255,255,0.52);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.section {
  width: min(var(--max), calc(100% - 42px));
  margin: 0 auto;
  padding: 92px 0;
}
.section-heading {
  max-width: 850px;
  margin-bottom: 34px;
}
.section-heading p {
  max-width: 720px;
}
.card-grid,
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.info-card,
.feature-panel,
.table-card,
.step,
.contact-form {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}
.info-card,
.step {
  min-height: 220px;
  padding: 26px;
  transition: transform 160ms ease, border-color 160ms ease;
}
.info-card:hover,
.step:hover {
  border-color: rgba(30,136,255,0.35);
  transform: translateY(-5px);
}
.info-card span,
.step b {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border-radius: 13px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--purple));
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(330px, 0.7fr);
  gap: 26px;
  align-items: center;
}
.feature-panel {
  padding: 32px;
  background:
    radial-gradient(circle at 90% 12%, rgba(123,54,223,0.12), transparent 28%),
    var(--white);
}
.feature-panel strong {
  display: block;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: 26px;
}
.feature-panel li,
.check-list li {
  margin-bottom: 10px;
}

.applications {
  width: 100%;
  max-width: none;
  padding-right: max(22px, calc((100vw - var(--max)) / 2));
  padding-left: max(22px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background: linear-gradient(135deg, #081b42, #25105a);
}
.applications h2,
.applications .section-heading p {
  color: var(--white);
}
.applications .eyebrow {
  color: #9ee7ff;
}
.tag-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}
.tag-grid span,
.project-list span,
.eco-list span {
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.1);
  font-weight: 900;
}

.spec-highlight {
  padding: 34px;
  border-radius: var(--radius);
  color: var(--white);
  background: linear-gradient(135deg, #0a1b3f, #642bd4);
  box-shadow: var(--shadow);
}
.spec-highlight h2,
.spec-highlight p,
.spec-highlight .eyebrow {
  color: var(--white);
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}
.metric-grid span {
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.1);
}
.metric-grid strong {
  display: block;
  font-size: 30px;
}
.table-card {
  overflow: hidden;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
th {
  color: var(--ink);
}

.eco-band,
.final-cta {
  display: grid;
  width: min(var(--max), calc(100% - 42px));
  margin: 28px auto;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.7fr);
  gap: 26px;
  align-items: center;
  padding: 44px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.eco-band {
  background: linear-gradient(135deg, #f7fff8, #ffffff);
}
.eco-band h2 {
  color: #174d2b;
}
.eco-list,
.project-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.eco-list span {
  color: #174d2b;
  border-color: rgba(47,158,68,0.18);
  background: rgba(47,158,68,0.08);
}
.project-list span {
  color: var(--ink);
  border-color: var(--line);
  background: var(--white);
}

.presentation {
  display: grid;
  grid-template-columns: minmax(280px, 0.55fr) minmax(0, 0.75fr);
  gap: 36px;
  align-items: center;
}
.product-image {
  padding: 22px;
  border-radius: 28px;
  background: var(--white);
  box-shadow: var(--shadow);
}
.faq-list {
  display: grid;
  gap: 12px;
}
details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: var(--white);
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.07);
}
summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}
details p {
  margin: 14px 0 0;
}

.final-cta {
  color: var(--white);
  background:
    radial-gradient(circle at 82% 10%, rgba(30,136,255,0.25), transparent 30%),
    linear-gradient(135deg, #07152f, #1b0f52);
}
.final-cta h2,
.final-cta p,
.final-cta .eyebrow {
  color: var(--white);
}
.contact-form {
  display: grid;
  gap: 12px;
  padding: 24px;
}
.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fbfdff;
}
.contact-form small {
  color: var(--muted);
}

.site-footer {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.8fr;
  gap: 24px;
  padding: 42px max(22px, calc((100vw - var(--max)) / 2));
  color: rgba(255,255,255,0.78);
  background: #071020;
}
.site-footer strong {
  color: var(--white);
}
.footer-logo {
  width: 132px;
  height: auto;
  margin-bottom: 16px;
}
.site-footer address {
  font-style: normal;
  line-height: 1.7;
}
.site-footer nav {
  display: grid;
  gap: 10px;
  font-weight: 800;
}
.legal {
  grid-column: 1 / -1;
  margin: 0;
  color: rgba(255,255,255,0.58);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.delay {
  transition-delay: 120ms;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .eco-band,
  .final-cta,
  .presentation {
    grid-template-columns: 1fr;
  }
  .hero {
    background:
      linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(255,255,255,0.82) 52%, rgba(255,255,255,0.42) 100%),
      url("../images/cubrem-max-hero.png") center right / cover no-repeat;
  }
  .hero-card {
    justify-self: start;
    width: min(360px, 100%);
  }
  .card-grid,
  .steps-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tag-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .menu-toggle { display: block; }
  .site-nav {
    position: fixed;
    inset: 74px 16px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
  .hero {
    padding-top: 122px;
  }
  h1 { font-size: 43px; }
  h2 { font-size: 34px; }
  .card-grid,
  .steps-grid,
  .tag-grid,
  .metric-grid,
  .eco-list,
  .project-list,
  .site-footer {
    grid-template-columns: 1fr;
  }
  .eco-band,
  .final-cta {
    padding: 28px;
  }
  .button {
    width: 100%;
  }
}