:root {
  --bg: #FAF8F5;
  --bg-alt: #F0EDE8;
  --fg: #1A1A1A;
  --fg-muted: #6B6560;
  --accent: #E85D26;
  --accent-light: #FFF0E8;
  --surface: #FFFFFF;
  --border: #E5E0DA;
  --chat-bot-bg: #E85D26;
  --chat-bot-fg: #FFFFFF;
  --chat-user-bg: #F0EDE8;
  --chat-user-fg: #1A1A1A;
  --green: #1A7F64;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: rgba(250, 248, 245, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--fg-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--fg); }

/* Hero */
.hero {
  padding: 80px 48px 60px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(36px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 540px;
  margin-bottom: 48px;
}

.chat-bubble {
  padding: 18px 22px;
  border-radius: 16px;
  position: relative;
}

.chat-bubble.bot {
  background: var(--chat-bot-bg);
  color: var(--chat-bot-fg);
  border-bottom-left-radius: 4px;
}

.chat-bubble.user {
  background: var(--chat-user-bg);
  color: var(--chat-user-fg);
  border-bottom-right-radius: 4px;
  margin-left: 48px;
}

.chat-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 8px;
}

.chat-bubble p {
  font-size: 14px;
  line-height: 1.6;
}

.visit-card {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
}

.hero-stat-row {
  display: flex;
  gap: 48px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  color: var(--fg);
  letter-spacing: -1px;
}

.stat-label {
  font-size: 13px;
  color: var(--fg-muted);
}

/* Features */
.features {
  background: var(--surface);
  padding: 96px 48px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  max-width: 560px;
  margin-bottom: 56px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  max-width: 1100px;
}

.feature-card {
  padding: 40px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 12px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Difference */
.difference {
  padding: 96px 48px;
  background: var(--bg);
}

.diff-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: start;
}

.diff-left h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 24px;
}

.diff-left p {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

.diff-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.diff-card {
  padding: 28px 32px;
  border-radius: 16px;
  border: 1px solid;
}

.diff-card.human {
  background: var(--surface);
  border-color: var(--border);
}

.diff-card.ai {
  background: var(--accent);
  border-color: var(--accent);
}

.diff-card-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.human-label { color: var(--fg-muted); }
.ai-label { color: rgba(255,255,255,0.7); }

.diff-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.diff-card li {
  font-size: 14px;
  line-height: 1.4;
}

.human li { color: var(--fg); }
.human li::before { content: none; }

.ai li { color: rgba(255,255,255,0.9); }
.ai li::before { content: none; }

/* Closing */
.closing {
  padding: 100px 48px;
  background: var(--fg);
  text-align: center;
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  color: #FFFFFF;
  margin-bottom: 28px;
}

.closing p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
}

.closing-tagline {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--accent) !important;
  letter-spacing: -0.5px;
  margin-top: 36px;
}

/* Footer */
footer {
  padding: 48px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
}

.footer-copy {
  font-size: 14px;
  color: var(--fg-muted);
  margin-left: 24px;
}

.footer-built {
  font-size: 12px;
  color: var(--fg-muted);
  margin-left: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar { padding: 16px 24px; }
  .nav-links { display: none; }
  .hero { padding: 48px 24px 40px; }
  .hero-headline { letter-spacing: -1px; }
  .hero-stat-row { gap: 28px; flex-wrap: wrap; }
  .feature-grid { grid-template-columns: 1fr; }
  .diff-layout { grid-template-columns: 1fr; gap: 48px; }
  .chat-bubble.user { margin-left: 0; }
  .features, .difference, .closing { padding: 64px 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-built { margin-left: 0; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 32px; }
  .stat-number { font-size: 26px; }
}