:root {
  --bg: #0b0e14;
  --surface: #14181f;
  --surface-2: #1c212a;
  --border: #252b37;
  --text: #e8eaf0;
  --text-muted: #7a8294;
  --accent: #c8ff57;
  --accent-2: #57d9ff;
  --green: #4ade80;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: 'Syne', sans-serif;
  line-height: 1.15;
  font-weight: 700;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 8% 60px;
  max-width: 860px;
  margin: 0 auto;
}

.hero-eyebrow {
  margin-bottom: 28px;
}

.badge {
  display: inline-block;
  background: rgba(200, 255, 87, 0.1);
  border: 1px solid rgba(200, 255, 87, 0.25);
  color: var(--accent);
  font-size: 12px;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
}

.hero h1 {
  font-size: clamp(42px, 7vw, 80px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}

.hero-lede {
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.coming-soon {
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}

/* SECTION COMMON */
.section-tag {
  display: inline-block;
  font-size: 11px;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* PROBLEM */
.problem {
  padding: 100px 8%;
  border-top: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1100px;
  margin: 0 auto;
}

.problem-left h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  color: #fff;
  margin: 16px 0 28px;
}

.problem-left p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 16px;
}

.problem-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: center;
}

.pain-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.pain-icon {
  color: #ff6b6b;
  flex-shrink: 0;
  margin-top: 2px;
}

.pain-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* HOW */
.how {
  padding: 100px 8%;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.how h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  color: #fff;
  margin: 16px 0 20px;
  max-width: 600px;
}

.how-sub {
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 60px;
  font-size: 18px;
}

.how-flow {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  max-width: 900px;
}

.flow-step {
  flex: 1;
  min-width: 200px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
}

.flow-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 36px;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 12px;
}

.flow-step h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 14px;
  color: var(--text-muted);
}

.flow-arrow {
  color: var(--border);
  flex-shrink: 0;
}

/* FEATURES */
.features {
  padding: 100px 8%;
  border-top: 1px solid var(--border);
}

.features h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  color: #fff;
  margin: 16px 0 56px;
  max-width: 560px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(200, 255, 87, 0.2);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(200, 255, 87, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* DEMO CHAT */
.demo {
  padding: 100px 8%;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.demo-label h2 {
  font-size: clamp(26px, 3vw, 40px);
  color: #fff;
  margin: 16px 0 20px;
}

.demo-label p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.65;
}

.chat-window {
  background: #1e1e2e;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid #2e2e3e;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}

.chat-header {
  background: #16161e;
  padding: 16px 20px;
  border-bottom: 1px solid #2e2e3e;
}

.chat-business {
  display: flex;
  align-items: center;
  gap: 12px;
}

.business-avatar {
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #0b0e14;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 13px;
}

.business-name {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: #fff;
}

.business-tag {
  font-size: 11px;
  color: var(--accent);
  margin-top: 2px;
}

.chat-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
}

.msg {
  display: flex;
  flex-direction: column;
  max-width: 85%;
}

.customer-msg {
  align-self: flex-end;
}

.ai-msg {
  align-self: flex-start;
}

.msg span {
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.5;
}

.customer-msg span {
  background: var(--accent);
  color: #0b0e14;
  border-bottom-right-radius: 4px;
  font-weight: 500;
}

.ai-msg span {
  background: #2e2e3e;
  color: #e8eaf0;
  border-bottom-left-radius: 4px;
}

.msg-time {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  padding: 0 4px;
}

.ai-msg .msg-time {
  color: var(--accent);
}

.chat-footer {
  padding: 12px 20px;
  border-top: 1px solid #2e2e3e;
  background: #16161e;
}

.ai-notification {
  font-size: 12px;
  color: var(--green);
  font-weight: 500;
}

/* CLOSING */
.closing {
  padding: 120px 8%;
  border-top: 1px solid var(--border);
  text-align: center;
}

.closing h2 {
  font-size: clamp(32px, 4vw, 56px);
  color: #fff;
  margin: 0 auto 28px;
  max-width: 700px;
}

.closing p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 16px;
  font-size: 18px;
  line-height: 1.7;
}

.closing-line {
  color: var(--accent) !important;
  font-family: 'Syne', sans-serif;
  font-size: 16px !important;
  font-weight: 600;
  margin-top: 32px !important;
}

/* FOOTER */
.footer {
  padding: 40px 8%;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.footer-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: #fff;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .problem-grid,
  .demo-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .how-flow {
    flex-direction: column;
    align-items: stretch;
  }

  .flow-arrow {
    display: none;
  }

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

  .hero {
    padding-top: 60px;
  }

  .closing {
    padding: 80px 8%;
  }
}

@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-brand {
    flex-direction: column;
    gap: 8px;
  }
}