:root {
  --bg: #ffffff;
  --ink: #111827;
  --muted: #5b667a;
  --line: #dbe3ef;
  --panel: #f7f9fc;
  --navy: #0f172a;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --teal: #0f766e;
  --green: #16a34a;
  --shadow: 0 24px 42px -34px rgba(15, 23, 42, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.7;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15, 23, 42, 0.96);
  border-bottom: 1px solid rgba(148, 163, 184, 0.28);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 32px));
  height: 80px;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #f8fafc;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(96, 165, 250, 0.6);
  border-radius: 12px;
  background: linear-gradient(135deg, #2563eb, #0f766e);
  color: white;
  font-size: 14px;
  box-shadow: 0 18px 30px -24px rgba(59, 130, 246, 0.9);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #cbd5e1;
  font-weight: 700;
  font-size: 15px;
}

.nav-links a {
  transition: color 160ms ease;
}

.nav-links a:hover {
  color: white;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 10px;
  background: transparent;
}

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

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - 80px);
  place-items: center;
  overflow: hidden;
  background: var(--navy);
  text-align: center;
}

.hero-visual,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.78;
}

.hero-overlay {
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.58), rgba(15, 23, 42, 0.84)),
    radial-gradient(circle at center, rgba(37, 99, 235, 0.24), transparent 48%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(980px, calc(100% - 32px));
  padding: 64px 0;
}

.eyebrow,
.section-kicker,
.support-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: white;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.12;
  letter-spacing: 0;
}

.hero h1 span {
  color: #60a5fa;
}

.hero-copy {
  max-width: 760px;
  margin: 28px auto 36px;
  color: #e5edf8;
  font-size: clamp(18px, 2.4vw, 23px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 10px;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

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

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

.button.ghost {
  border: 2px solid rgba(255, 255, 255, 0.9);
  color: white;
}

.button.ghost:hover {
  background: white;
  color: var(--navy);
}

.button.full {
  width: 100%;
}

.section {
  padding: 88px 0;
}

.section.muted {
  background: var(--panel);
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.container.narrow {
  width: min(780px, calc(100% - 32px));
}

.center {
  text-align: center;
}

h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.25;
  letter-spacing: 0;
}

h2::after {
  display: block;
  width: 72px;
  height: 2px;
  margin: 20px auto 0;
  background: var(--blue);
  content: "";
}

.split h2::after {
  margin-left: 0;
}

.lead {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.grid {
  display: grid;
  gap: 24px;
  margin-top: 52px;
}

.grid.three {
  grid-template-columns: repeat(3, 1fr);
}

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

.feature-card,
.activity-card,
.support-panel,
.person-card,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
  box-shadow: var(--shadow);
}

.feature-card {
  padding: 30px;
}

.feature-card h3,
.activity-card h3,
.support-panel h3,
.person-card h3,
.contact-card h3 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 21px;
  line-height: 1.35;
}

.feature-card p,
.activity-card p,
.support-panel p,
.person-card p,
.contact-card p {
  margin: 0;
  color: var(--muted);
}

.icon-dot {
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  border-radius: 14px;
}

.feature-card.blue .icon-dot {
  background: linear-gradient(135deg, var(--blue), #60a5fa);
}

.feature-card.green .icon-dot {
  background: linear-gradient(135deg, var(--green), #5eead4);
}

.feature-card.slate .icon-dot {
  background: linear-gradient(135deg, #334155, #94a3b8);
}

.activity-card {
  position: relative;
  display: block;
  min-height: 310px;
  padding: 30px;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.activity-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 30px 48px -34px rgba(37, 99, 235, 0.48);
}

.card-arrow {
  position: absolute;
  top: 22px;
  right: 22px;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid #bfdbfe;
  border-radius: 50%;
  color: var(--blue);
  font-weight: 900;
}

.activity-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  border-radius: 12px;
  background: #dbeafe;
  position: relative;
}

.activity-icon::after {
  position: absolute;
  inset: 14px;
  border: 3px solid var(--blue);
  border-radius: 6px;
  content: "";
}

.activity-icon.arm {
  background: #dcfce7;
}

.activity-icon.arm::after {
  border-color: var(--green);
  border-radius: 50% 50% 8px 8px;
}

.activity-icon.data {
  background: #ede9fe;
}

.activity-icon.data::after {
  border-color: #7c3aed;
}

.activity-icon.network {
  background: #ccfbf1;
}

.activity-icon.network::after {
  border-color: var(--teal);
  border-radius: 50%;
}

.activity-card ul {
  display: grid;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  color: #475569;
  font-size: 14px;
  list-style: none;
}

.activity-card li::before {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--blue);
  content: "";
  vertical-align: middle;
}

.split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.support-panel,
.contact-card {
  padding: 34px;
}

.support-panel {
  border-color: #bfdbfe;
  background: linear-gradient(180deg, #eff6ff, white);
}

.support-panel h3 {
  font-size: 36px;
}

.message-band {
  padding: 76px 0;
  background: var(--navy);
  color: white;
}

.message-band blockquote {
  width: min(900px, 100%);
  margin: 0 auto;
  color: #e2e8f0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.55;
  text-align: center;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 52px;
}

.person-card {
  padding: 26px;
  text-align: center;
}

.avatar {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, #dbeafe, #ccfbf1);
  color: var(--blue-dark);
  font-weight: 900;
}

.person-card span {
  display: block;
  color: #64748b;
  font-size: 14px;
}

.news-list {
  display: grid;
  gap: 12px;
  margin-top: 46px;
}

.news-row {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
  box-shadow: 0 18px 32px -32px rgba(15, 23, 42, 0.45);
  transition: border-color 160ms ease, transform 160ms ease;
}

.news-row:hover {
  border-color: #93c5fd;
  transform: translateY(-1px);
}

.news-row time {
  color: #64748b;
  font-size: 14px;
}

.news-row h3 {
  margin: 0;
  font-size: 17px;
}

.news-row span {
  padding: 4px 10px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-size: 13px;
  font-weight: 800;
}

.contact {
  background: linear-gradient(180deg, #f8fafc, #ffffff);
}

.footer {
  background: var(--navy);
  color: #cbd5e1;
  padding: 46px 0 22px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.footer p {
  margin: 12px 0 0;
}

.footer-links {
  display: grid;
  gap: 8px;
  min-width: 180px;
}

.footer-links a:hover {
  color: white;
}

.copyright {
  width: min(1120px, calc(100% - 32px));
  margin: 28px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(148, 163, 184, 0.24);
  color: #94a3b8;
  font-size: 14px;
}

@media (max-width: 820px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 80px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-radius: 14px;
    background: #111827;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 14px;
  }

  .hero {
    min-height: 680px;
  }

  .section {
    padding: 68px 0;
  }

  .grid.three,
  .grid.two,
  .split,
  .people-grid {
    grid-template-columns: 1fr;
  }

  .news-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .news-row span {
    width: fit-content;
  }

  .footer-inner {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: 42px 0;
  }

  .button {
    width: 100%;
  }

  .feature-card,
  .activity-card,
  .support-panel,
  .person-card,
  .contact-card {
    padding: 24px;
  }
}