/* ===========================
   BOOKFLOW — Design System
   =========================== */

:root {
  --bg: #0A1628;
  --bg-surface: #0F2040;
  --bg-card: #142850;
  --fg: #F0F4FF;
  --fg-muted: #8899B4;
  --accent: #F59E0B;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --border: rgba(255, 255, 255, 0.07);
  --radius: 12px;
  --radius-lg: 20px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-family: 'Instrument Serif', serif;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.header-nav {
  display: flex;
  gap: 32px;
}

.header-nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.header-nav a:hover { color: var(--fg); }

/* Sections */
.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.section-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 24px;
}

/* ===========================
   HERO
   =========================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-glow {
  position: absolute;
  top: 20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  padding: 0 48px 0 32px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

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

.hero-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(44px, 5.5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-headline em {
  color: var(--accent);
  font-style: italic;
}

.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 460px;
  margin-bottom: 48px;
}

.hero-proof {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 480px;
}

.proof-stat {
  flex: 1;
  padding: 20px 24px;
  text-align: center;
}

.proof-number {
  display: block;
  font-family: 'Instrument Serif', serif;
  font-size: 28px;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.proof-label {
  display: block;
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.proof-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* CTA Form */
.hero-cta {
  max-width: 480px;
  margin-bottom: 40px;
}

.cta-inputs {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.cta-inputs input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 400;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  min-width: 0;
}

.cta-inputs input::placeholder { color: var(--fg-muted); }
.cta-inputs input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  background: var(--accent);
  color: #0A1628;
  border: none;
  border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  white-space: nowrap;
}

.cta-btn:hover {
  background: #E8920A;
  box-shadow: 0 4px 20px rgba(245,158,11,0.35);
  transform: translateY(-1px);
}

.cta-btn:active { transform: translateY(0); }

.cta-note {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 12px;
  padding-left: 2px;
}

.cta-success {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(74,222,128,0.08);
  border: 1px solid rgba(74,222,128,0.25);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-top: 8px;
}

.cta-success strong {
  display: block;
  font-size: 14px;
  color: #4ADE80;
  margin-bottom: 2px;
}

.cta-success span {
  display: block;
  font-size: 13px;
  color: var(--fg-muted);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 0 32px 0 0;
}

.agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 340px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.4), 0 0 40px rgba(245,158,11,0.06);
}

.agent-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.agent-avatar {
  width: 36px;
  height: 36px;
  background: var(--accent-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.agent-info {
  flex: 1;
}

.agent-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
}

.agent-status {
  display: block;
  font-size: 11px;
  color: #4ADE80;
}

.agent-live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ADE80;
  animation: pulse 2s infinite;
}

.agent-conversation {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-bubble {
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.5;
  max-width: 260px;
}

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

.chat-bubble.user {
  background: var(--accent);
  color: #0A1628;
  border-bottom-right-radius: 4px;
  align-self: flex-end;
}

.booked-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(74, 222, 128, 0.12);
  color: #4ADE80;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 100px;
  align-self: flex-start;
}

/* ===========================
   HOW IT WORKS
   =========================== */
.how-it-works {
  padding: 120px 0;
  position: relative;
}

.how-it-works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 0;
  margin-top: 64px;
}

.step-card {
  padding: 32px 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.step-number {
  font-family: 'Instrument Serif', serif;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.step-icon {
  color: var(--fg-muted);
  margin-bottom: 16px;
}

.step-card h3 {
  font-family: 'Instrument Serif', serif;
  font-size: 20px;
  color: var(--fg);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

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

.step-connector {
  width: 48px;
  height: 1px;
  background: var(--border);
  margin-top: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.step-connector::after {
  content: '';
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--fg-muted);
  border-bottom: 1.5px solid var(--fg-muted);
  transform: rotate(-45deg);
}

/* ===========================
   OUTCOMES
   =========================== */
.outcomes {
  padding: 120px 0;
  position: relative;
}

.outcomes-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 50%, var(--bg) 100%);
  opacity: 0.4;
}

.outcomes-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
}

.outcomes-body {
  color: var(--fg-muted);
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.outcomes-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.outcomes-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  color: var(--fg);
  font-weight: 500;
}

.outcomes-visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.metric-label {
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.metric-bar-wrap {
  height: 8px;
  background: var(--bg-surface);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 8px;
}

.metric-bar {
  height: 100%;
  border-radius: 100px;
  transition: width 1s ease;
}

.metric-bar--bad { background: #6B7280; }
.metric-bar--good { background: var(--accent); }

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

.metric-card--highlight {
  background: var(--accent-dim);
  border-color: rgba(245,158,11,0.3);
  text-align: center;
  padding: 24px;
}

.metric-result {
  font-family: 'Instrument Serif', serif;
  font-size: 48px;
  color: var(--accent);
  letter-spacing: -0.03em;
}

.metric-result-label {
  font-size: 14px;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* ===========================
   PRICING
   =========================== */
.pricing {
  padding: 120px 0;
}

.pricing-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 540px;
  margin: -12px 0 56px;
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
}

.pricing-card--featured {
  background: var(--bg-card);
  border-color: rgba(245,158,11,0.3);
  box-shadow: 0 0 60px rgba(245,158,11,0.06);
}

.pricing-card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0A1628;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-tier {
  font-family: 'Instrument Serif', serif;
  font-size: 24px;
  color: var(--fg);
  margin-bottom: 12px;
}

.pricing-price {
  font-family: 'Instrument Serif', serif;
  font-size: 44px;
  color: var(--fg);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.pricing-period {
  font-size: 18px;
  color: var(--fg-muted);
  font-family: 'DM Sans', sans-serif;
}

.pricing-description {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--fg);
}

/* ===========================
   TESTIMONIALS
   =========================== */
.testimonials {
  padding: 80px 0 120px;
  border-top: 1px solid var(--border);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.testimonial-quote {
  font-family: 'Instrument Serif', serif;
  font-size: 18px;
  color: var(--fg);
  line-height: 1.55;
  font-style: italic;
  margin-bottom: 24px;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.testimonial-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}

.testimonial-role {
  font-size: 12px;
  color: var(--fg-muted);
}

/* ===========================
   CLOSING
   =========================== */
.closing {
  padding: 120px 0;
  position: relative;
}

.closing-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 100%, rgba(245,158,11,0.07) 0%, transparent 70%);
}

.closing-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 24px;
}

.closing-body {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 48px;
}

.closing-promise {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.promise-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}

/* ===========================
   FOOTER
   =========================== */
.site-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Instrument Serif', serif;
  font-size: 18px;
  color: var(--fg);
}

.footer-tagline {
  font-size: 14px;
  color: var(--fg-muted);
  max-width: 400px;
}

.footer-copy {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 8px;
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 100px 0 60px; }
  .hero-visual { padding: 0 32px; justify-content: flex-start; }
  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .step-connector { display: none; }
  .outcomes-split { grid-template-columns: 1fr; gap: 48px; }
  .pricing-cards { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .header-nav { display: none; }
  .closing-promise { gap: 20px; }
}

@media (max-width: 480px) {
  .section-inner { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .hero-inner { padding: 0 20px; }
  .hero-proof { flex-direction: column; }
  .proof-divider { width: 40px; height: 1px; }
}