:root {
  --bg: #08101f;
  --panel: #101a2d;
  --panel-2: #16233b;
  --text: #f4f7ff;
  --muted: #a7b4ce;
  --line: rgba(126, 163, 255, 0.18);
  --blue: #6fa8ff;
  --cyan: #4fd2ff;
  --green: #41d39f;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  --content-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(79, 210, 255, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(111, 168, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #091224 0%, #07101e 100%);
  color: var(--text);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(8, 16, 31, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-badge {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, #3379ff 0%, #16c5d8 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.28), 0 16px 32px rgba(29, 93, 214, 0.35);
  position: relative;
}

.brand-badge::after {
  content: "KU";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 0.96rem;
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: stretch;
}

.hero-card,
.card,
.page-card {
  background: linear-gradient(180deg, rgba(18, 29, 49, 0.96), rgba(13, 23, 39, 0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 38px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #d6ecff;
  background: rgba(111, 168, 255, 0.11);
  border: 1px solid rgba(111, 168, 255, 0.22);
  font-size: 0.92rem;
}

.hero h1 {
  font-size: clamp(2.7rem, 4vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  margin: 18px 0 14px;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 18px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.button:hover { transform: translateY(-1px); }
.button.primary {
  background: linear-gradient(135deg, #3379ff 0%, #33c1ff 100%);
  color: white;
}
.button.secondary {
  border-color: rgba(111, 168, 255, 0.22);
  background: rgba(111, 168, 255, 0.08);
  color: #dbeaff;
}

.hero-side {
  padding: 28px;
  display: grid;
  gap: 16px;
}

.metric {
  padding: 18px 20px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(28, 42, 68, 0.94), rgba(19, 30, 49, 0.9));
  border: 1px solid rgba(111, 168, 255, 0.16);
}

.metric strong {
  display: block;
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 8px;
}

.metric span {
  color: var(--muted);
}

.section {
  padding: 18px 0 54px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 60ch;
}

.grid {
  display: grid;
  gap: 18px;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 24px;
}

.card h3,
.page-card h1,
.page-card h2,
.page-card h3 {
  margin-top: 0;
  letter-spacing: -0.02em;
}

.card p,
.card li,
.page-card p,
.page-card li {
  color: var(--muted);
  line-height: 1.65;
}

.list {
  margin: 0;
  padding-left: 18px;
}

.page-wrap {
  padding: 52px 0 72px;
}

.page-card {
  padding: 34px;
}

.page-card + .page-card {
  margin-top: 20px;
}

.highlight {
  color: var(--blue);
}

.footer {
  padding: 28px 0 52px;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
  font-size: 0.94rem;
}

.notice {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(79, 210, 255, 0.08);
  border: 1px solid rgba(79, 210, 255, 0.16);
  color: #dcefff;
}

@media (max-width: 980px) {
  .hero-grid,
  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }

  .section-head,
  .footer-inner,
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .hero { padding-top: 48px; }
  .hero-card, .hero-side, .card, .page-card { padding: 22px; }
  .container { width: min(var(--content-width), calc(100% - 20px)); }
  .nav { min-height: 66px; }
}