/* ── Tokens ── */
:root {
  --bg: #F8F5F0;
  --surface: #FFFFFF;
  --primary: #111827;
  --accent: #E8692C;
  --accent-warm: #FFF0E6;
  --muted: #6B7280;
  --border: #E5E0D8;
  --success: #059669;
  --radius: 14px;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--primary);
  font-family: 'Manrope', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Syne', system-ui, sans-serif;
  line-height: 1.1;
  font-weight: 700;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 245, 240, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.wordmark {
  font-family: 'Syne', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.header-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--border);
  padding: 3px 8px;
  border-radius: 20px;
}

.lang-switcher {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.lang-btn {
  font-family: 'Manrope', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.lang-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.lang-btn.lang-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ── Hero ── */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(2rem, 4vw, 2.9rem);
  color: var(--primary);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 420px;
}

/* ── Chat Stack (Hero Visual) ── */
.hero-visual {
  position: relative;
}

.chat-stack {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.07);
}

.chat-bubble {
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.5;
  max-width: 88%;
}

.incoming {
  background: var(--bg);
  color: var(--primary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.outgoing {
  background: var(--primary);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.ai-mark {
  border-left: 3px solid var(--accent);
}

.msg-time {
  display: block;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 4px;
}

.incoming .msg-time { color: var(--muted); }

.response-badge {
  position: absolute;
  bottom: -16px;
  right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.response-dot {
  width: 7px;
  height: 7px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ── Proof Bar ── */
.proof {
  background: var(--primary);
  color: #fff;
  padding: 40px 24px;
}

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

.proof-stat {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}

.proof-num {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.proof-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.4;
  display: block;
}

.proof-divider {
  width: 1px;
  height: 60px;
  background: rgba(255,255,255,0.15);
}

/* ── How It Works ── */
.how {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.step {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 0 24px;
}

.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--accent-warm);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.step-body p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

.step-arrow {
  width: 40px;
  height: 2px;
  background: var(--border);
  flex-shrink: 0;
  margin-top: 22px;
  position: relative;
}

.step-arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -4px;
  border: 5px solid transparent;
  border-left-color: var(--border);
}

/* ── Features ── */
.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Why ── */
.why {
  background: var(--primary);
  color: #fff;
  padding: 80px 24px;
}

.why-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.why-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.why-headline {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.why-body {
  font-size: 1rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ── Closing ── */
.closing {
  background: var(--accent);
  padding: 80px 24px;
  text-align: center;
}

.closing-text {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1rem;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-meta {
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .hero-sub { max-width: 100%; }

  .proof-inner { flex-direction: column; gap: 24px; }
  .proof-divider { width: 60px; height: 1px; }

  .steps { flex-direction: column; gap: 24px; }
  .step-arrow { display: none; }

  .features-grid { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  .hero { padding: 48px 20px 40px; }
  .how { padding: 48px 20px; }
  .features { padding-bottom: 48px; }
  .why { padding: 48px 20px; }
  .closing { padding: 48px 20px; }
}