:root {
  --bg: #0a0a0f;
  --bg-secondary: #12121a;
  --fg: #e8e6e1;
  --fg-muted: #8a8880;
  --accent: #ff6b35;
  --accent-glow: rgba(255, 107, 53, 0.15);
  --accent-secondary: #ff9f1c;
  --surface: #1a1a24;
  --surface-border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- NAV ---- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 40px;
  position: relative;
  z-index: 10;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.5px;
  color: var(--fg);
}

.nav-tag {
  font-size: 13px;
  color: var(--fg-muted);
  padding: 6px 14px;
  border: 1px solid var(--surface-border);
  border-radius: 100px;
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow) 0%, transparent 60%),
    var(--bg);
}

.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 40px;
  max-width: 820px;
}

.hero-badge {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 28px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* Hero cards grid */
.hero-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 60px 40px 80px;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}

.hero-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.hero-card span {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}

/* ---- HOW IT WORKS ---- */
.howit {
  padding: 120px 40px;
  background: var(--bg-secondary);
}

.howit-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.howit h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 64px;
  letter-spacing: -1px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.3;
  margin-bottom: 16px;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

/* ---- FEATURES ---- */
.features {
  padding: 120px 40px;
}

.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}

.feature-block:last-child {
  margin-bottom: 0;
}

.feature-right .feature-visual {
  order: -1;
}

.feature-text h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.feature-text em {
  color: var(--accent);
  font-style: normal;
}

.feature-text p {
  color: var(--fg-muted);
  font-size: 16px;
  line-height: 1.7;
}

/* Mock notification */
.mock-notification {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.notif-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
  box-shadow: 0 0 12px var(--accent);
}

.notif-content strong {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.notif-content span {
  color: var(--fg-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* Mock chat */
.mock-chat {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-bubble {
  padding: 16px 20px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
  max-width: 90%;
}

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

.ai-bubble {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--fg-muted);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

/* ---- CLOSING ---- */
.closing {
  padding: 140px 40px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 40% at 50% 100%, var(--accent-glow) 0%, transparent 60%),
    var(--bg-secondary);
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 24px;
}

.closing-text {
  color: var(--fg-muted);
  font-size: 18px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.closing-stat {
  display: inline-block;
}

.stat-location {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ---- FOOTER ---- */
.footer {
  padding: 40px;
  border-top: 1px solid var(--surface-border);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--fg);
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .nav { padding: 20px 24px; }
  .hero-content { padding: 0 24px; }
  
  .hero-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 40px 24px 60px;
    gap: 12px;
  }
  
  .howit { padding: 80px 24px; }
  .steps {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .features { padding: 80px 24px; }
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-right .feature-visual { order: 0; }
  
  .closing { padding: 100px 24px; }
  .footer { padding: 30px 24px; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}