:root {
  --navy: #07182f;
  --navy-2: #0a2342;
  --blue: #6cb1ec;
  --cyan: #8fe6ff;
  --ink: #f6fbff;
  --muted: #b7c8d9;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.13);
  --line: rgba(255, 255, 255, 0.16);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--navy);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.6;
}

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

img,
video {
  display: block;
  max-width: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 78px;
  padding: 14px clamp(20px, 5vw, 72px);
  color: var(--ink);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(7, 24, 47, 0.9);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 900;
}

.brand video {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 10px 13px;
  border-radius: 8px;
  color: rgba(246, 251, 255, 0.9);
  font-size: 0.92rem;
  font-weight: 800;
}

.site-nav a:hover {
  background: var(--panel);
}

.site-nav .nav-cta {
  color: var(--navy);
  background: var(--cyan);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 24, 47, 0.96) 0%, rgba(7, 24, 47, 0.82) 42%, rgba(7, 24, 47, 0.2) 100%),
    linear-gradient(0deg, rgba(7, 24, 47, 0.72), rgba(7, 24, 47, 0.1));
}

.hero-content {
  position: relative;
  width: min(760px, calc(100% - 40px));
  margin-left: clamp(20px, 7vw, 88px);
  padding-top: 80px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  line-height: 0.98;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.05;
}

.hero-content > p:not(.eyebrow),
.section-heading p,
.section-copy p,
.realization-card p,
.contact p {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
}

.button-primary {
  color: var(--navy);
  background: var(--cyan);
}

.button-secondary {
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.46);
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding: clamp(70px, 9vw, 116px) clamp(20px, 5vw, 72px);
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  background: #061326;
}

.intro-band div,
.feature-grid article,
.scenario-grid article,
.signal-panel,
.realization-card,
.contact-card,
.table-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.intro-band div {
  min-height: 150px;
  padding: 24px;
}

.intro-band strong {
  display: block;
  color: var(--cyan);
  font-size: 1.35rem;
  line-height: 1.15;
}

.intro-band span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
}

.section-project {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 500px);
  gap: clamp(30px, 7vw, 82px);
  align-items: center;
  background: var(--navy-2);
}

.signal-panel {
  padding: 28px;
  background:
    radial-gradient(circle at top right, rgba(108, 177, 236, 0.22), transparent 36%),
    var(--panel);
}

.signal-panel video {
  width: 100%;
  border-radius: 8px;
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.signal-list span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
  font-weight: 700;
}

.section-how {
  background: #061326;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

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

.feature-grid article,
.scenario-grid article {
  min-height: 250px;
  padding: 24px;
  box-shadow: none;
}

.feature-grid span {
  color: var(--cyan);
  font-weight: 900;
}

.feature-grid h3,
.scenario-grid h3 {
  margin: 30px 0 0;
  font-size: 1.16rem;
}

.feature-grid p,
.scenario-grid p {
  margin: 13px 0 0;
  color: var(--muted);
}

.realizations {
  background:
    linear-gradient(180deg, rgba(6, 19, 38, 0.98), rgba(10, 35, 66, 0.98)),
    radial-gradient(circle at 82% 12%, rgba(143, 230, 255, 0.14), transparent 34%);
}

.realization-stack {
  display: grid;
  gap: 22px;
}

.realization-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 42px);
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05)),
    rgba(255, 255, 255, 0.07);
}

.realization-card.is-reversed {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.95fr);
}

.realization-card.is-reversed img {
  order: 2;
}

.realization-card img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.realization-card div {
  padding: clamp(24px, 4vw, 46px);
}

.realization-card span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.realization-card h3 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 3.1rem);
  line-height: 1.05;
}

.realization-card p {
  margin-top: 18px;
}

.comparison {
  background: var(--navy-2);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

th,
td {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--cyan);
  font-size: 0.88rem;
  text-transform: uppercase;
}

td {
  color: var(--muted);
}

td:nth-child(2) {
  color: var(--ink);
  font-weight: 800;
}

.scenarios {
  background: #061326;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
  gap: clamp(28px, 6vw, 70px);
  align-items: center;
  background: linear-gradient(135deg, #0a2342, #061326);
}

.contact-card {
  display: grid;
  gap: 10px;
  min-height: 180px;
  align-content: center;
  padding: 30px;
}

.contact-card span {
  color: var(--muted);
  font-weight: 800;
}

.contact-card strong {
  color: var(--cyan);
  font-size: clamp(1.3rem, 2vw, 1.8rem);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: #030b16;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 1060px) {
  .feature-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .intro-band,
  .section-project,
  .realization-card,
  .realization-card.is-reversed,
  .contact {
    grid-template-columns: 1fr;
  }

  .realization-card.is-reversed img {
    order: 0;
  }

  .realization-card img {
    min-height: 280px;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 68px;
    padding: 10px 18px;
  }

  .brand video {
    width: 46px;
    height: 46px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    background: rgba(7, 24, 47, 0.98);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 13px 14px;
  }

  .hero {
    min-height: 92vh;
    align-items: flex-end;
  }

  .hero-overlay {
    background: linear-gradient(0deg, rgba(7, 24, 47, 0.96) 0%, rgba(7, 24, 47, 0.74) 58%, rgba(7, 24, 47, 0.2) 100%);
  }

  .hero-content {
    width: calc(100% - 36px);
    margin: 0 18px 46px;
    padding-top: 88px;
  }

  h1 {
    font-size: clamp(2.55rem, 13vw, 4rem);
  }

  .section {
    padding: 58px 18px;
  }

  .feature-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid article,
  .scenario-grid article {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
    padding: 24px 18px;
  }
}