:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --fg: #e8e6e3;
  --fg-muted: #8a8891;
  --accent: #c4f042;
  --accent-dim: rgba(196, 240, 66, 0.12);
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 2rem;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 780px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  border: 1px solid rgba(196, 240, 66, 0.2);
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-gradient {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(ellipse at center, rgba(196, 240, 66, 0.06) 0%, transparent 65%);
  pointer-events: none;
  z-index: 1;
}

/* ---- PROBLEM ---- */
.problem {
  padding: 8rem 2rem;
  border-top: 1px solid var(--border);
}

.problem-inner {
  max-width: 960px;
  margin: 0 auto;
}

.problem-label,
.kit-label,
.specs-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.problem h2,
.kit h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

.problem-icon {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1.2rem;
  letter-spacing: 0.05em;
}

.problem-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ---- KIT ---- */
.kit {
  padding: 8rem 2rem;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
}

.kit-inner {
  max-width: 960px;
  margin: 0 auto;
}

.kit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.kit-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
}

.kit-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--bg);
  background: var(--accent);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.kit-item h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.kit-item p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.kit-specs {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.kit-specs li {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  border: 1px solid rgba(196, 240, 66, 0.15);
}

/* ---- SPECS ---- */
.specs {
  padding: 8rem 2rem;
  border-top: 1px solid var(--border);
}

.specs-inner {
  max-width: 960px;
  margin: 0 auto;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.spec {
  padding: 1.5rem 0;
  border-top: 2px solid var(--accent);
}

.spec-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 0.6rem;
}

.spec-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ---- CLOSING ---- */
.closing {
  padding: 10rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.closing-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.closing-sub {
  color: var(--fg-muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }
  .kit-grid {
    grid-template-columns: 1fr;
  }
  .specs-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero {
    min-height: 85vh;
    padding: 6rem 1.5rem 4rem;
  }
  .problem,
  .kit,
  .specs {
    padding: 5rem 1.5rem;
  }
  .closing {
    padding: 6rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .specs-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}