:root {
  --bg: #faf9f7;
  --bg-warm: #f5f0eb;
  --fg: #1a1a2e;
  --fg-muted: #5a5a72;
  --accent: #0d7377;
  --accent-light: #14a3a8;
  --accent-glow: rgba(13, 115, 119, 0.08);
  --amber: #d4920a;
  --amber-light: #fef3d0;
  --card-bg: #ffffff;
  --border: #e8e4df;
  --radius: 16px;
  --radius-sm: 10px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg-shape {
  position: absolute;
  top: -200px;
  right: -150px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid rgba(13, 115, 119, 0.15);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 24px;
  max-width: 700px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-num {
  display: block;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--accent);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--fg-muted);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ─── Hero CTA ─── */
.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.btn-cta-primary {
  display: inline-block;
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  transition: background 0.2s, transform 0.15s;
  box-shadow: 0 4px 16px rgba(13, 115, 119, 0.25);
}

.btn-cta-primary:hover {
  background: #0a5c5f;
  transform: translateY(-1px);
}

.btn-cta-secondary {
  display: inline-block;
  padding: 14px 24px;
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.btn-cta-secondary:hover { color: var(--accent); }

/* ─── Features ─── */
.features {
  padding: 100px 0;
}

.features h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 56px;
  max-width: 550px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover {
  border-color: rgba(13, 115, 119, 0.25);
  box-shadow: 0 8px 30px rgba(13, 115, 119, 0.06);
}

.feature-highlight {
  background: linear-gradient(135deg, var(--accent) 0%, #0a5c5f 100%);
  color: #fff;
  border-color: transparent;
  grid-column: 1 / -1;
}

.feature-highlight h3,
.feature-highlight p,
.feature-highlight .feature-icon {
  color: #fff;
}

.feature-highlight p {
  opacity: 0.88;
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* ─── How / Why Section ─── */
.how {
  padding: 80px 0 100px;
  background: var(--bg-warm);
}

.how-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.how h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.how-body {
  font-size: 1rem;
  color: var(--fg-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.how-points {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.how-point {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg);
}

.point-marker {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* Chat preview */
.chat-preview {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 92%;
}

.user-bubble {
  background: var(--accent-glow);
  border: 1px solid rgba(13, 115, 119, 0.12);
  color: var(--fg);
  align-self: flex-end;
}

.ai-bubble {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  color: var(--fg);
  align-self: flex-start;
}

/* ─── Closing ─── */
.closing {
  padding: 100px 0;
  text-align: center;
}

.closing-inner {
  max-width: 640px;
  margin: 0 auto;
}

.closing h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

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

/* ─── Footer ─── */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--fg);
}

.footer-note {
  font-size: 0.82rem;
  color: var(--fg-muted);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .hero { padding: 80px 0 60px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-highlight { grid-column: auto; }
  .how-layout { grid-template-columns: 1fr; gap: 40px; }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
  .closing { padding: 60px 0; }
}