:root {
  --bg: #0b0f19;
  --surface: #151b2b;
  --surface-light: #1e2738;
  --border: #26324d;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --cyan: #38bdf8;
  --indigo: #818cf8;
  --green: #22c55e;
  --radius: 12px;
  --max-width: 1200px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand-img {
  height: 48px;
  width: auto;
  display: block;
}

.brand-text {
  margin-left: 0.75rem;
  white-space: nowrap;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--text);
}

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0 3rem;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12), transparent 55%);
  pointer-events: none;
}

.eyebrow {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: var(--surface);
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.hero-lead {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2.5rem;
}

/* Countdown */
.countdown {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.countdown-item {
  min-width: 76px;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.countdown-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.countdown-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.4rem;
}

/* Pillars */
.pillars {
  padding: 3rem 0 4rem;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.pillar-card {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition);
}

.pillar-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--surface-light);
  color: var(--cyan);
  margin-bottom: 1rem;
}

.pillar-icon svg {
  width: 22px;
  height: 22px;
}

.pillar-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.pillar-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Notify */
.notify {
  padding: 3rem 0 5rem;
}

.notify-inner {
  max-width: 560px;
  text-align: center;
}

.notify-text {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.notify-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.notify-form input {
  flex: 1;
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
}

.notify-form input::placeholder {
  color: var(--text-muted);
}

.notify-form input:focus {
  border-color: var(--cyan);
}

.btn-primary {
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius);
  border: 0;
  background: linear-gradient(135deg, var(--cyan), var(--indigo));
  color: #020617;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.notify-feedback {
  min-height: 1.5rem;
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--green);
}

.notify-feedback[aria-hidden="true"] {
  display: none;
}

/* Footer */
.site-footer {
  margin-top: auto;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand-img {
  height: 40px;
  width: auto;
  display: block;
}

/* Responsive */
@media (min-width: 640px) {
  .hero {
    padding: 5rem 0 4rem;
  }

  .countdown-item {
    min-width: 100px;
    padding: 1.25rem 1.5rem;
  }

  .notify-form {
    flex-direction: row;
    align-items: stretch;
  }

  .btn-primary {
    flex-shrink: 0;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 6rem 0 4.5rem;
  }

  .pillars-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}