:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --fg: #1A1A1A;
  --fg-muted: #6B7280;
  --accent: #E07A3D;
  --accent-warm: #F5E6D8;
  --slate: #1E2A3A;
  --slate-light: #2D3E50;
  --sage: #7FBB8A;
  --sage-light: #E8F4EB;
  --border: #E8E5E0;
  --radius: 12px;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html { font-size: 16px; }

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

/* ── Navigation ── */
.nav {
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}
.nav-inner { max-width: 1200px; margin: 0 auto; }
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

/* ── Hero ── */
.hero {
  padding: 80px 48px 96px;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-warm);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero-lede {
  font-size: 1.125rem;
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 36px;
  max-width: 420px;
}

/* UI Card (shown on desktop left) */
.ui-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 420px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.ui-lang-select {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ui-lang-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 0.875rem;
}
.ui-lang-active {
  background: var(--sage-light);
  border-color: var(--sage);
}
.ui-arrow { color: var(--fg-muted); }
.ui-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}
.ui-call-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.ui-pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--sage);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.ui-status-text {
  font-size: 0.75rem;
  color: var(--fg-muted);
  font-weight: 500;
}
.ui-transcript { display: flex; flex-direction: column; gap: 10px; }
.ui-msg { padding: 10px 14px; border-radius: 10px; font-size: 0.8rem; line-height: 1.5; }
.ui-msg-you { background: var(--sage-light); color: var(--fg); align-self: flex-end; max-width: 85%; }
.ui-msg-them { background: #F0F4FF; color: var(--fg); align-self: flex-start; max-width: 85%; }
.ui-msg-label { font-weight: 600; font-size: 0.7rem; display: block; margin-bottom: 4px; color: var(--fg-muted); }

/* ── Phone Visual ── */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.phone-frame {
  width: 260px;
  background: var(--slate);
  border-radius: 36px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(30,42,58,0.35), 0 0 0 1px rgba(255,255,255,0.1) inset;
}
.phone-notch {
  width: 80px;
  height: 22px;
  background: var(--slate);
  border-radius: 0 0 16px 16px;
  margin: 0 auto 4px;
}
.phone-screen {
  background: #F8F8F6;
  border-radius: 26px;
  overflow: hidden;
  padding: 16px;
  min-height: 480px;
  display: flex;
  flex-direction: column;
}
.phone-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.phone-app-name { font-family: var(--font-display); font-size: 0.9rem; color: var(--fg); }
.phone-lang-badge {
  font-size: 0.65rem;
  font-weight: 600;
  background: var(--accent-warm);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 10px;
}
.phone-convo {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}
.phone-msg {
  padding: 10px 12px;
  border-radius: 14px;
  font-size: 0.72rem;
  line-height: 1.5;
  max-width: 80%;
}
.phone-msg-r {
  background: #E8F4EB;
  color: #1A1A1A;
  align-self: flex-end;
}
.phone-msg-l {
  background: var(--slate-light);
  color: #FFFFFF;
  align-self: flex-start;
}
.phone-wave {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  height: 32px;
  margin-top: 12px;
}
.wave-bar {
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
  animation: wave 1.2s ease-in-out infinite;
}
.wave-bar:nth-child(1) { animation-delay: 0s; }
.wave-bar:nth-child(2) { animation-delay: 0.1s; }
.wave-bar:nth-child(3) { animation-delay: 0.2s; }
.wave-bar:nth-child(4) { animation-delay: 0.3s; }
.wave-bar:nth-child(5) { animation-delay: 0.4s; }
.wave-bar:nth-child(6) { animation-delay: 0.5s; }
.wave-bar:nth-child(7) { animation-delay: 0.6s; }
@keyframes wave {
  0%, 100% { height: 8px; opacity: 0.6; }
  50% { height: 24px; opacity: 1; }
}

/* ── How It Works ── */
.how-it-works {
  background: var(--slate);
  padding: 96px 48px;
}
.how-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.how-it-works h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  color: #FFFFFF;
  margin-bottom: 56px;
  letter-spacing: -0.02em;
}
.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
}
.step { padding: 0 32px; }
.step-num {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: #FFFFFF;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.step p { font-size: 0.9rem; color: #9AA5B4; line-height: 1.65; }
.step-connector {
  width: 1px;
  height: 120px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  opacity: 0.4;
  align-self: center;
}

/* ── Use Cases ── */
.use-cases { padding: 96px 48px; }
.use-inner { max-width: 1100px; margin: 0 auto; }
.use-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.use-card {
  background: var(--surface);
  padding: 36px 28px;
  transition: background 0.2s;
}
.use-card:hover { background: var(--accent-warm); }
.use-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-warm);
  border-radius: 10px;
  color: var(--accent);
  margin-bottom: 20px;
  transition: background 0.2s;
}
.use-card:hover .use-icon { background: var(--accent); color: #fff; }
.use-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--fg);
  margin-bottom: 10px;
}
.use-card p { font-size: 0.85rem; color: var(--fg-muted); line-height: 1.6; }

/* ── Manifesto ── */
.manifesto {
  background: var(--accent-warm);
  padding: 96px 48px;
}
.manifesto-inner { max-width: 760px; margin: 0 auto; text-align: center; }
.manifesto blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  color: var(--fg);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-style: italic;
  margin-bottom: 32px;
}
.manifesto p {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.75;
  max-width: 560px;
  margin: 0 auto;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 48px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--fg);
}
.footer-tagline { font-size: 0.875rem; color: var(--fg-muted); }

/* ── Mobile Responsive ── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .ui-card { max-width: 100%; }
  .steps-grid { grid-template-columns: 1fr; gap: 32px; }
  .step-connector { display: none; }
  .use-grid { grid-template-columns: 1fr 1fr; }
  .manifesto, .how-it-works, .use-cases, .hero { padding-left: 24px; padding-right: 24px; }
  .nav { padding: 20px 24px; }
}
@media (max-width: 600px) {
  .use-grid { grid-template-columns: 1fr; }
  .how-it-works h2, .hero-text h1 { font-size: 2rem; }
}