:root {
  --bg-primary: #0a0a0c;
  --bg-secondary: #111115;
  --bg-card: #16161a;
  --bg-card-hover: #1c1c22;
  --fg-primary: #e8e6e3;
  --fg-secondary: #9a9a9e;
  --fg-muted: #5a5a5e;
  --accent: #22d3a7;
  --accent-dim: #1a9e7e;
  --accent-glow: rgba(34, 211, 167, 0.12);
  --warning: #f5a623;
  --radius: 12px;
  --radius-sm: 8px;
  --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-primary);
  color: var(--fg-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 80px 48px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

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

.lede {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.cta-btn {
  display: inline-block;
  background: var(--accent);
  color: #0a0a0c;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 15px 32px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity 0.2s, transform 0.15s;
  margin-bottom: 14px;
}

.cta-btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.cta-sub {
  font-size: 0.82rem;
  color: var(--fg-muted);
  margin-top: 12px;
}

/* Diagnostic Card Animation */
.diagnostic-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--fg-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.status-dot.pulse {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { opacity: 0.7; box-shadow: 0 0 0 8px transparent; }
}

.card-body {
  padding: 24px 20px;
  position: relative;
}

.scan-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scan 3s linear infinite;
}

@keyframes scan {
  0% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.card-issue {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--fg-primary);
}

.card-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.step {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.step.done {
  color: var(--fg-secondary);
}

.step.active {
  color: var(--accent);
}

.step-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  flex-shrink: 0;
  position: relative;
}

.step-dot::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ---- PROBLEM ---- */
.problem {
  padding: 120px 48px;
  background: var(--bg-secondary);
}

.problem-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color 0.3s, transform 0.3s;
}

.problem-card:hover {
  border-color: rgba(255,255,255,0.1);
  transform: translateY(-4px);
}

.problem-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(245, 166, 35, 0.1);
  color: var(--warning);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

/* ---- HOW ---- */
.how {
  padding: 120px 48px;
}

.how-container {
  max-width: 800px;
  margin: 0 auto;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent-dim);
  opacity: 0.5;
  min-width: 60px;
  line-height: 1;
  padding-top: 4px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--fg-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 520px;
}

.how-connector {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent-dim), transparent);
  margin-left: 30px;
  opacity: 0.3;
}

/* ---- EDGE ---- */
.edge {
  padding: 120px 48px;
  background: var(--bg-secondary);
}

.edge-container {
  max-width: 1200px;
  margin: 0 auto;
}

.edge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.edge-item {
  border-left: 2px solid var(--accent-dim);
  padding-left: 28px;
}

.edge-metric {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}

.edge-item p {
  color: var(--fg-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- CLOSING ---- */
.closing {
  padding: 160px 48px;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.closing-container {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.closing-sub {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  line-height: 1.7;
}

/* ---- FOOTER ---- */
.footer {
  padding: 48px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg-primary);
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    padding: 60px 24px;
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    order: -1;
  }

  .problem,
  .how,
  .edge,
  .closing {
    padding: 80px 24px;
  }

  .problem-grid,
  .edge-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .how-step {
    gap: 20px;
  }

  .step-number {
    font-size: 1.8rem;
    min-width: 40px;
  }

  .footer-container {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .closing {
    padding: 100px 24px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .closing h2 {
    font-size: 1.6rem;
  }

  .edge-metric {
    font-size: 1.8rem;
  }
}