:root {
  --bg: #0a0a0a;
  --bg-2: #121212;
  --surface: #181818;
  --surface-2: #1f1f1f;
  --border: rgba(255,255,255,0.10);
  --border-strong: rgba(255,255,255,0.16);
  --text: #f5f5f5;
  --muted: #b5b5b5;
  --muted-2: #8f8f8f;
  --accent: #d0d0d0;
  --accent-strong: #ffffff;
  --success: #4caf50;
  --shadow: 0 20px 50px rgba(0,0,0,0.35);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.05), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(255,255,255,0.03), transparent 25%),
    linear-gradient(180deg, #0d0d0d 0%, #090909 45%, #080808 100%);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.22), rgba(0,0,0,0.04) 30%, rgba(0,0,0,0));
  opacity: 0.15;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, a.button {
  font: inherit;
}

.page-shell {
  width: 100%;
}

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

.site-header {
  position: fixed;
  top: 14px;
  left: 0;
  right: 0;
  z-index: 1000;
  width: min(var(--max), calc(100% - 20px));
  margin: 0 auto;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(10,10,10,0.68);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 210px;
}

.brand-title {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--muted);
}

.variant-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  overflow: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
}

.variant-nav::-webkit-scrollbar { display: none; }

.nav-chip {
  flex: 0 0 auto;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  font-size: 0.92rem;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease;
  white-space: nowrap;
}

.nav-chip:hover,
.nav-chip:focus-visible {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.06);
  border-color: var(--border);
  color: var(--text);
  outline: none;
}

.nav-chip.active {
  background: rgba(255,255,255,0.09);
  border-color: var(--border-strong);
  color: var(--text);
}

.nav-chip.primary {
  background: rgba(76, 175, 80, 0.13);
  border-color: rgba(76, 175, 80, 0.32);
  color: #cce8cf;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding: 140px 0 72px;
}

.hero-grid {
  display: grid;
  gap: 34px;
  align-items: center;
  grid-template-columns: 1.2fr 0.8fr;
}

.hero-copy {
  max-width: 760px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
}

.kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--success);
  box-shadow: 0 0 14px rgba(76,175,80,0.45);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5.8rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.hero h1 .accent {
  display: block;
  color: var(--muted);
  font-size: 0.45em;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero p {
  margin: 24px 0 0;
  max-width: 54ch;
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  background: rgba(255,255,255,0.06);
  border-color: var(--border-strong);
  box-shadow: 0 14px 30px rgba(0,0,0,0.25);
  outline: none;
}

.button.primary {
  background: linear-gradient(180deg, rgba(255,255,255,0.13), rgba(255,255,255,0.07));
  border-color: rgba(255,255,255,0.16);
}

.button.success {
  background: rgba(76,175,80,0.14);
  border-color: rgba(76,175,80,0.28);
  color: #dff2e0;
}

.hero-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  box-shadow: var(--shadow);
  padding: 24px;
}

.hero-panel .panel-title {
  margin: 0 0 14px;
  font-size: 0.92rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-list {
  display: grid;
  gap: 12px;
}

.panel-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  padding: 16px;
}

.panel-item strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.panel-item span {
  color: var(--muted);
  font-size: 0.94rem;
}

.section {
  padding: 92px 0;
}

.section-header {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}

.section-header h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  max-width: 68ch;
}

.variant-grid,
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.variant-card,
.pillar-card,
.about-card,
.timeline-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  box-shadow: 0 10px 28px rgba(0,0,0,0.22);
}

.variant-card {
  padding: 22px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.variant-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
}

.variant-card.active {
  border-color: rgba(76,175,80,0.30);
  box-shadow: 0 18px 36px rgba(0,0,0,0.26);
}

.variant-card .badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.variant-card.active .badge {
  border-color: rgba(76,175,80,0.30);
  background: rgba(76,175,80,0.12);
  color: #cdeacb;
}

.variant-card h3,
.pillar-card h3,
.about-card h3 {
  margin: 0;
  font-size: 1.26rem;
  line-height: 1.2;
}

.variant-card p,
.pillar-card p,
.about-card p,
.timeline-item p {
  margin: 10px 0 0;
  color: var(--muted);
}

.card-footer {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-link {
  color: var(--text);
  font-size: 0.92rem;
  opacity: 0.88;
}

.pillar-card {
  padding: 22px;
}

.pillar-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--accent-strong);
  font-weight: 700;
}

.timeline-card {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.timeline {
  display: grid;
  gap: 14px;
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255,255,255,0.26), rgba(255,255,255,0.06));
}

.timeline-item {
  position: relative;
  padding: 2px 0 2px 8px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--bg);
  border: 2px solid var(--muted-2);
}

.timeline-item.active::before {
  border-color: var(--success);
  background: var(--success);
  box-shadow: 0 0 0 6px rgba(76,175,80,0.08);
}

.about-card {
  padding: 26px;
  display: grid;
  gap: 18px;
}

.footer {
  padding: 34px 0 48px;
  color: var(--muted-2);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--text);
  outline: none;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.site-header.reveal {
  opacity: 0;
  transform: translateY(-14px);
}

.site-header.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero-grid,
  .variant-grid,
  .pillars-grid {
    grid-template-columns: 1fr;
  }

  .brand {
    min-width: 168px;
  }

  .site-header {
    border-radius: 24px;
    top: 10px;
    width: min(var(--max), calc(100% - 14px));
  }

  .hero {
    padding-top: 150px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max), calc(100% - 24px));
  }

  .header-inner {
    gap: 12px;
  }

  .brand-title {
    font-size: 0.88rem;
  }

  .brand-subtitle {
    display: none;
  }

  .nav-chip {
    padding: 9px 12px;
    font-size: 0.86rem;
  }

  .hero h1 {
    letter-spacing: -0.04em;
  }

  .section {
    padding: 76px 0;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}