:root {
  --bg: #0a0a0f;
  --bg-alt: #12121a;
  --fg: #e8e8ec;
  --fg-muted: #8a8a9a;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-dark: #00a88a;
  --border: rgba(255,255,255,0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', 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: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
}

/* ---- HERO ---- */
.hero {
  padding: 120px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 170, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 24px;
  font-family: var(--font-display);
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .accent {
  color: var(--accent);
}

.lede {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 500px;
  line-height: 1.7;
}

/* Graph Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.graph-container {
  display: flex;
  gap: 20px;
  align-items: flex-end;
  height: 300px;
  padding: 30px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
}

.graph-bar {
  flex: 1;
  height: var(--h);
  background: linear-gradient(to top, rgba(0, 212, 170, 0.3), rgba(0, 212, 170, 0.05));
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 8px 8px 4px 4px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 12px;
  animation: growUp 0.8s ease-out backwards;
  animation-delay: var(--delay);
  position: relative;
}

.graph-bar.accent-bar {
  background: linear-gradient(to top, var(--accent), rgba(0, 212, 170, 0.4));
  border-color: var(--accent);
}

.graph-bar span {
  font-size: 0.7rem;
  color: var(--fg-muted);
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.graph-bar.accent-bar span {
  color: var(--bg);
  font-weight: 600;
}

@keyframes growUp {
  from { height: 0; opacity: 0; }
  to { height: var(--h); opacity: 1; }
}

/* ---- PROBLEM ---- */
.problem {
  padding: 100px 24px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.problem h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 50px;
  text-align: center;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.problem-card {
  padding: 36px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.problem-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.problem-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---- FEATURES ---- */
.features {
  padding: 100px 24px;
}

.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.features h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 50px;
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 36px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- HOW ---- */
.how {
  padding: 100px 24px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.how-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.how h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 60px;
  text-align: center;
}

.how-flow {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  justify-content: center;
}

.how-step {
  flex: 1;
  max-width: 280px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.how-step h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.how-step p {
  color: var(--fg-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.how-arrow {
  color: var(--accent);
  font-size: 1.5rem;
  margin-top: 30px;
  opacity: 0.4;
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 24px;
  text-align: center;
}

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

.closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  margin-bottom: 24px;
  font-style: italic;
  font-weight: 500;
}

.closing-text {
  font-size: 1.15rem;
  color: var(--fg-muted);
  margin-bottom: 30px;
  line-height: 1.7;
}

.closing-sub {
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 6px;
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero { padding: 80px 20px 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .graph-container { height: 200px; }
  .problem-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .how-flow { flex-direction: column; align-items: center; }
  .how-arrow { transform: rotate(90deg); }
  .problem, .features, .how, .closing { padding: 60px 20px; }
}