:root {
  --bg: #0a0f0d;
  --bg-alt: #111916;
  --fg: #e8ede9;
  --fg-muted: #8a9b8f;
  --accent: #4ade80;
  --accent-dim: rgba(74, 222, 128, 0.12);
  --accent-glow: rgba(74, 222, 128, 0.25);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 12px;
  --max-w: 1100px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

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

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 80%, var(--accent-dim) 0%, transparent 60%);
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: 999px;
  padding: 0.4em 1.2em;
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  width: 200px;
  height: 200px;
  margin-top: 3rem;
}

.scan-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent-glow);
  border-radius: 50%;
  animation: pulse-ring 3s ease-out infinite;
}

.scan-ring-2 { animation-delay: 1s; }
.scan-ring-3 { animation-delay: 2s; }

@keyframes pulse-ring {
  0% { transform: scale(0.6); opacity: 0.8; }
  100% { transform: scale(1.8); opacity: 0; }
}

.bird-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bird-icon svg {
  width: 80px;
  height: 80px;
}

/* === HERO ACTIONS === */
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2.5rem;
}

.btn-hero {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: 10px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
}

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

.btn-hero-ghost {
  display: inline-block;
  background: rgba(255,255,255,0.06);
  color: var(--fg);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  text-decoration: none;
  transition: background 0.2s;
}

.btn-hero-ghost:hover { background: rgba(255,255,255,0.1); }

/* === PROBLEM === */
.problem {
  padding: 6rem 1.5rem;
  background: var(--bg-alt);
}

.problem-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.problem h2, .features h2, .how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}

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

.problem-card {
  background: var(--bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 2rem;
}

.problem-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 1.2rem;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

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

/* === FEATURES === */
.features {
  padding: 6rem 1.5rem;
}

.features-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

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

.feature-card {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover::before { opacity: 1; }

.feature-card-large {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-alt) 0%, rgba(74, 222, 128, 0.04) 100%);
}

.feature-number {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
}

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

/* === HOW === */
.how {
  padding: 6rem 1.5rem;
  background: var(--bg-alt);
}

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

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

.step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

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

.step-line {
  width: 2px;
  height: 2.5rem;
  background: linear-gradient(to bottom, var(--accent-glow), transparent);
  margin-left: 23px;
}

/* === CLOSING === */
.closing {
  padding: 8rem 1.5rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 20%, var(--accent-dim) 0%, transparent 50%);
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

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

/* === FOOTER === */
.site-footer {
  padding: 3rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

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

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card-large {
    grid-column: 1;
  }
  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  .hero-visual {
    width: 150px;
    height: 150px;
  }
}

@media (max-width: 480px) {
  .hero { padding: 4rem 1rem 2rem; }
  .problem, .features, .how { padding: 4rem 1rem; }
  .closing { padding: 5rem 1rem; }
  .step { gap: 1rem; }
  .step-num { width: 40px; height: 40px; font-size: 1rem; }
  .step-line { margin-left: 19px; }
}