:root {
  --bg: #0a0a0f;
  --bg-subtle: #12121a;
  --fg: #e8e8f0;
  --fg-dim: #7a7a8e;
  --accent: #6cf0c2;
  --accent-glow: rgba(108, 240, 194, 0.15);
  --accent-secondary: #a78bfa;
  --card-bg: #16161f;
  --card-border: #1f1f2e;
  --radius: 16px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.node {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.15;
  animation: pulse 4s ease-in-out infinite;
}
.n1 { width: 320px; height: 320px; top: -80px; right: -60px; animation-delay: 0s; }
.n2 { width: 200px; height: 200px; bottom: 10%; left: -40px; background: var(--accent-secondary); animation-delay: 1s; }
.n3 { width: 140px; height: 140px; top: 30%; right: 15%; background: var(--accent-secondary); opacity: 0.08; animation-delay: 2s; }
.n4 { width: 80px; height: 80px; bottom: 20%; right: 30%; animation-delay: 0.5s; }
.n5 { width: 60px; height: 60px; top: 15%; left: 20%; animation-delay: 1.5s; }

.line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.07;
  transform-origin: left center;
}
.l1 { width: 500px; top: 25%; left: 0; transform: rotate(25deg); }
.l2 { width: 400px; top: 60%; right: 0; transform: rotate(-15deg); }
.l3 { width: 600px; bottom: 30%; left: -100px; transform: rotate(10deg); }
.l4 { width: 350px; top: 40%; left: 30%; transform: rotate(-30deg); background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent); }

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.12; }
  50% { transform: scale(1.08); opacity: 0.2; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  text-align: center;
}

.hero-tag {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-dim);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---- PROBLEM ---- */
.problem {
  padding: 6rem 2rem;
  background: var(--bg-subtle);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}

.problem-inner {
  max-width: 860px;
  margin: 0 auto;
}

.problem-label, .feature-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
}

.problem h2 .dim { color: var(--fg-dim); }

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.stat {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.problem-text {
  font-size: 1.05rem;
  color: var(--fg-dim);
  line-height: 1.8;
}

/* ---- FEATURES ---- */
.features {
  padding: 6rem 2rem;
}

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

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

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-glow);
}

.feature-icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--fg-dim);
  line-height: 1.7;
}

/* ---- VISION ---- */
.vision {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 60%);
}

.vision-inner {
  max-width: 700px;
  margin: 0 auto;
}

.vision h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
}

.vision-sub {
  font-size: 1.1rem;
  color: var(--fg-dim);
}

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

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--fg);
}

.footer-sep { opacity: 0.3; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .stats-row { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 3rem 1.5rem; }
  .problem, .features { padding: 4rem 1.5rem; }
  .vision { padding: 5rem 1.5rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2.2rem; }
  .problem h2 { font-size: 1.5rem; }
  .vision h2 { font-size: 1.4rem; }
}