:root {
  --bg0: #0b1410;
  --bg1: #12261c;
  --ink: #eef6ef;
  --muted: #a8b9ad;
  --lime: #b6f34d;
  --lime-deep: #7cbc1f;
  --line: rgba(238, 246, 239, 0.12);
  --card: rgba(18, 38, 28, 0.72);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --font-display: "Unbounded", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg0);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: var(--lime);
  text-underline-offset: 0.18em;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 55% at 15% 10%, rgba(182, 243, 77, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(46, 120, 90, 0.35), transparent 50%),
    linear-gradient(165deg, #0b1410 0%, #12261c 45%, #0a1812 100%);
}

.grid-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(182, 243, 77, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(182, 243, 77, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
  animation: drift 28s linear infinite;
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(0, 48px, 0);
  }
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 0;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.top-link {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

.top-link:hover {
  color: var(--ink);
}

main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.hero {
  min-height: calc(100svh - 4.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.5rem 0 3rem;
  max-width: 40rem;
  animation: rise 0.9s ease-out both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.brand-mark {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 9vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--lime);
  text-shadow: 0 0 60px rgba(182, 243, 77, 0.25);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 0.15rem;
  min-height: 3.4rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: linear-gradient(135deg, var(--lime) 0%, var(--lime-deep) 100%);
  color: #102015;
  box-shadow: 0 12px 40px rgba(182, 243, 77, 0.28);
}

.btn.primary:hover {
  filter: brightness(1.05);
}

.btn-meta {
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.75;
}

.btn.ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.btn.ghost:hover {
  border-color: rgba(182, 243, 77, 0.45);
}

.note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.how,
.tips {
  margin-top: 1rem;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--card);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  animation: rise 1s ease-out 0.15s both;
}

.how + .tips {
  margin-top: 1.25rem;
}

h2 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 1rem;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 0.9rem;
  align-items: start;
}

.steps li::before {
  content: counter(step);
  grid-row: 1 / span 2;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(182, 243, 77, 0.14);
  color: var(--lime);
  font-weight: 700;
  font-size: 0.9rem;
}

.steps strong {
  font-size: 1rem;
}

.steps span {
  color: var(--muted);
  font-size: 0.95rem;
}

.tips ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
  display: grid;
  gap: 0.65rem;
}

.foot {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot a {
  color: var(--muted);
  text-decoration: none;
}

.foot a:hover {
  color: var(--lime);
}

@media (max-width: 640px) {
  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  .cta-row {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .how,
  .tips {
    padding: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .grid-glow,
  .hero,
  .how,
  .tips {
    animation: none;
  }

  .btn {
    transition: none;
  }
}