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

:root {
  --bg: #0a0a0f;
  --bg-subtle: #12121a;
  --text: #f0f0f5;
  --text-muted: #8888a0;
  --accent-start: #4f46e5;
  --accent-end: #7c3aed;
  --radius: 12px;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Subtle background grain texture */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* Gradient glow behind hero */
body::before {
  content: "";
  position: fixed;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.12) 0%, rgba(124, 58, 237, 0.06) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* --- Header --- */
header {
  position: relative;
  z-index: 1;
  padding: 1.5rem 2rem;
  animation: fadeDown 0.6s ease-out;
}

.logo {
  text-decoration: none;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* --- Main --- */
main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 5rem;
}

.hero {
  text-align: center;
  max-width: 640px;
  animation: fadeUp 0.8s ease-out;
}

.hero-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.2), rgba(124, 58, 237, 0.2));
  border: 1px solid rgba(79, 70, 229, 0.3);
  margin-bottom: 1.5rem;
}

h1 {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 24px rgba(79, 70, 229, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79, 70, 229, 0.4);
}

.cta-button:active {
  transform: translateY(0);
}

/* --- Features --- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 820px;
  width: 100%;
  animation: fadeUp 1s ease-out;
}

.feature {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: border-color 0.2s;
}

.feature:hover {
  border-color: rgba(79, 70, 229, 0.3);
}

.feature-icon {
  color: var(--accent-start);
  margin-bottom: 1rem;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* --- Footer --- */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  animation: fadeUp 1s ease-out;
}

footer a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: border-color 0.2s;
}

footer a:hover {
  border-color: var(--accent-start);
}

.copyright {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: rgba(136, 136, 160, 0.6);
}

/* --- Animations --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Responsive --- */
@media (max-width: 640px) {
  header {
    padding: 1.25rem 1.25rem;
  }

  main {
    padding: 1.25rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .cta-button {
    width: 100%;
    justify-content: center;
    padding: 1rem 2rem;
  }

  .features {
    grid-template-columns: 1fr;
  }

  footer {
    padding: 1.5rem 1.25rem;
  }
}

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}