:root {
  --bg: #0c0f1a;
  --bg-surface: #141829;
  --bg-card: #1a1f36;
  --bg-accent: #252b48;
  --fg: #e8e6e1;
  --fg-muted: #9a97a0;
  --fg-dim: #6b677a;
  --accent: #f0a830;
  --accent-soft: rgba(240, 168, 48, 0.15);
  --accent-glow: rgba(240, 168, 48, 0.08);
  --coral: #e8725a;
  --teal: #4ecdc4;
  --lavender: #b8a9d4;
  --radius: 12px;
  --radius-lg: 20px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1140px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  padding: 24px 32px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(12, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(240, 168, 48, 0.08);
}

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

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-tagline {
  font-size: 14px;
  color: var(--fg-muted);
  font-style: italic;
}

/* Hero */
.hero {
  padding: 160px 32px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-inner {
  max-width: 720px;
}

.hero-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 28px;
  color: var(--fg);
}

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

.hero-lede {
  font-size: 19px;
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 600px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--bg-accent);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 13px;
  color: var(--fg-dim);
  max-width: 160px;
  line-height: 1.4;
}

/* Conversation Demo */
.convo-section {
  padding: 100px 32px;
  background: var(--bg-surface);
}

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

.convo-header {
  margin-bottom: 48px;
}

.convo-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.convo-header p {
  color: var(--fg-muted);
  font-size: 18px;
}

.convo-demo {
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.convo-bubble {
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  position: relative;
}

.convo-ai {
  background: var(--bg-card);
  border: 1px solid var(--bg-accent);
  border-left: 3px solid var(--accent);
}

.convo-user {
  background: var(--accent-soft);
  border: 1px solid rgba(240, 168, 48, 0.25);
  margin-left: 60px;
}

.convo-speaker {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 8px;
}

.convo-user .convo-speaker {
  color: var(--fg);
}

.convo-bubble p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
}

.convo-translate {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--fg-dim);
  font-style: italic;
}

.convo-note {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--teal);
  background: rgba(78, 205, 196, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
}

/* Features */
.features {
  padding: 100px 32px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-accent);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: border-color 0.3s;
}

.feature-card:hover {
  border-color: rgba(240, 168, 48, 0.3);
}

.feature-large {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-card) 100%);
  border-color: rgba(240, 168, 48, 0.15);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 10px;
  color: var(--fg);
}

.feature-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg-muted);
}

/* World Section */
.world-section {
  padding: 100px 32px;
  background: var(--bg-surface);
}

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

.world-text {
  max-width: 680px;
  margin-bottom: 48px;
}

.world-text h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: var(--fg);
}

.world-text p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--fg-muted);
  margin-bottom: 16px;
}

.world-languages {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.lang-tag {
  padding: 10px 22px;
  background: var(--bg-card);
  border: 1px solid var(--bg-accent);
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
  transition: all 0.3s;
}

.lang-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* Closing */
.closing {
  padding: 120px 32px;
  text-align: center;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.2;
  margin-bottom: 20px;
}

.closing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  font-style: italic;
}

/* Footer */
.footer {
  padding: 40px 32px;
  border-top: 1px solid var(--bg-accent);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
}

.footer-copy {
  font-size: 14px;
  color: var(--fg-dim);
}

/* Nav CTA */
.nav-cta {
  background: var(--accent);
  color: #0c0f1a;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 50px;
  text-decoration: none;
  letter-spacing: 0.2px;
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}

.nav-cta:hover {
  background: #f5b840;
  transform: scale(1.03);
}

/* Hero CTA */
.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #0c0f1a;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  letter-spacing: -0.2px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(240, 168, 48, 0.3);
}

.btn-primary:hover {
  background: #f5b840;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(240, 168, 48, 0.4);
}

.hero-lang-note {
  font-size: 13px;
  color: var(--fg-dim);
}

/* Mobile */
@media (max-width: 768px) {
  .hero { padding: 120px 20px 60px; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .convo-section, .features, .world-section, .closing { padding: 64px 20px; }
  .convo-user { margin-left: 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-large { grid-column: 1; }
  .nav { padding: 16px 20px; }
  .nav-tagline { display: none; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
  .world-languages { justify-content: center; }
  .closing h2 { font-size: 28px; }
  .nav-cta { font-size: 12px; padding: 8px 14px; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 12px; }
}