:root {
  --accent: #005baa;
  --accent-2: #28a9e0;
  --bg-a: #07192f;
  --bg-b: #123f6c;
  --ink: #111827;
  --muted: #68788a;
  --paper: rgba(255,255,255,0.94);
  --line: rgba(255,255,255,0.22);
  --shadow: 0 28px 70px rgba(3, 16, 34, 0.26);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 12%, color-mix(in srgb, var(--accent-2), transparent 45%), transparent 30%),
    radial-gradient(circle at 88% 8%, color-mix(in srgb, var(--accent), transparent 35%), transparent 34%),
    linear-gradient(135deg, var(--bg-a), var(--bg-b));
  font-family: Arial, Helvetica, sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  background-image:
    linear-gradient(rgba(255,255,255,0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.35) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
}

.progress {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.12);
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-2), #fff);
  box-shadow: 0 0 20px color-mix(in srgb, var(--accent-2), transparent 15%);
}

.shell {
  position: relative;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 44px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0 34px;
  color: #fff;
}

.topbar img {
  display: block;
  width: min(270px, 58vw);
  height: auto;
}

.home-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #fff;
  background: rgba(255,255,255,0.1);
  text-decoration: none;
  font-weight: 900;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  align-items: stretch;
}

.hero-card,
.info-card,
.section {
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  padding: clamp(26px, 4vw, 46px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: #08172b;
  font-size: clamp(35px, 5vw, 68px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: #42536a;
  font-size: 19px;
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #fff;
  background: var(--accent);
  text-decoration: none;
  font-weight: 900;
  box-shadow: 0 12px 26px color-mix(in srgb, var(--accent), transparent 70%);
}

.button.secondary {
  color: var(--accent);
  background: #f4faff;
  box-shadow: none;
}

.info-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  color: #fff;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--accent), #000 16%), color-mix(in srgb, var(--bg-a), #000 8%)),
    radial-gradient(circle at 25% 15%, color-mix(in srgb, var(--accent-2), transparent 55%), transparent 44%);
}

.info-card::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 280px;
  height: 280px;
  border: 38px solid rgba(255,255,255,0.08);
  border-radius: 50%;
}

.info-card h2,
.info-card p,
.info-card .mini-metric {
  position: relative;
  z-index: 1;
}

.info-card h2 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.15;
}

.info-card p {
  margin: 0;
  color: #e0f3ff;
  line-height: 1.48;
}

.mini-metrics {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.mini-metric {
  padding: 14px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  background: rgba(255,255,255,0.09);
}

.mini-metric strong {
  display: block;
  font-size: 14px;
  color: #bfeaff;
}

.mini-metric span {
  display: block;
  margin-top: 4px;
  font-weight: 900;
}

.section {
  margin-top: 24px;
  padding: 28px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
}

.section-head p {
  max-width: 540px;
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.materials-grid,
.details-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.materials-grid {
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
}

.material,
.detail {
  position: relative;
  overflow: hidden;
  border: 1px solid #d9e3ef;
  border-radius: 14px;
  background: #fff;
}

.material {
  display: flex;
  min-height: 124px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  padding: 16px 12px;
  color: var(--ink);
  text-align: center;
  text-decoration: none;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.detail {
  min-height: 190px;
  padding: 20px;
}

.material:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 42%, #d9e3ef);
  box-shadow: 0 18px 36px rgba(3,16,34,0.12);
}

.material::before,
.detail::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: var(--accent);
}

.detail::before {
  width: 5px;
}

.material-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent-2) 20%, #f3f8ff);
}

.material-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2.15;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.detail h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.18;
}

.material h3 {
  margin: 0;
  max-width: 100%;
  font-size: 15px;
  line-height: 1.18;
  overflow-wrap: anywhere;
}

.detail p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.placeholder {
  display: inline-flex;
  margin-top: 18px;
  padding: 8px 10px;
  border-radius: 9px;
  color: #627386;
  background: #eef2f6;
  font-weight: 900;
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.float-in {
  animation: floatIn 850ms ease both;
}

@keyframes floatIn {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 900px) {
  .topbar,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .materials-grid,
  .details-grid {
    grid-template-columns: 1fr;
  }
}