/* --- Variables --- */
:root {
  --bg: #f8f6f1;
  --bg-alt: #eeece7;
  --fg: #0f1923;
  --fg-muted: #5a6577;
  --accent: #e8913a;
  --accent-dark: #c97a2a;
  --navy: #1a2b4a;
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Instrument Sans', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-weight: 400;
  line-height: 1.15;
}

/* --- Nav --- */
.nav {
  padding: 24px 48px;
  border-bottom: 1px solid rgba(15,25,35,0.08);
  background: var(--bg);
}

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

.nav-logo {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 22px;
  color: var(--navy);
}

.nav-logo-ai {
  color: var(--accent);
}

/* --- Hero --- */
.hero {
  padding: 80px 48px 96px;
  background: var(--navy);
  color: var(--white);
}

.hero-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(40px, 5vw, 60px);
  color: var(--white);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.72);
  line-height: 1.7;
}

.hero-cta {
  margin-top: 36px;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  font-size: 16px;
  font-weight: 600;
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

/* --- Flow Visual --- */
.flow-visual {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-node {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.flow-icon {
  font-size: 24px;
  line-height: 1;
}

.flow-label {
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}

.flow-arrow {
  display: flex;
  justify-content: center;
  padding-left: 24px;
}

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

.section-title {
  font-size: clamp(30px, 3.5vw, 44px);
  color: var(--navy);
  margin-bottom: 16px;
}

/* --- How It Works --- */
.howitworks {
  padding: 96px 48px;
  max-width: 1100px;
  margin: 0 auto;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 56px;
}

.step {
  padding: 32px 28px;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid rgba(15,25,35,0.06);
}

.step-num {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 40px;
  color: var(--accent);
  opacity: 0.35;
  display: block;
  margin-bottom: 16px;
}

.step-title {
  font-size: 20px;
  color: var(--navy);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* --- Features --- */
.features {
  padding: 96px 48px;
  background: var(--bg-alt);
}

.features .section-title {
  max-width: 700px;
}

.features-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid rgba(15,25,35,0.06);
}

.feature-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 19px;
  color: var(--navy);
  margin-bottom: 10px;
}

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

/* --- Pricing --- */
.pricing {
  padding: 96px 48px;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.pricing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  margin-bottom: 56px;
}

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

.pricing-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 32px;
  border: 1px solid rgba(15,25,35,0.1);
  position: relative;
}

.pricing-card-featured {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-name {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 22px;
  margin-bottom: 16px;
}

.pricing-card-featured .plan-name {
  color: var(--white);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 6px;
}

.price-amount {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 42px;
}

.price-period {
  font-size: 15px;
  color: var(--fg-muted);
}

.pricing-card-featured .price-period {
  color: rgba(255,255,255,0.55);
}

.plan-setup {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 28px;
}

.pricing-card-featured .plan-setup {
  color: rgba(255,255,255,0.5);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plan-features li {
  font-size: 14px;
  color: var(--fg-muted);
  padding-left: 20px;
  position: relative;
}

.pricing-card-featured .plan-features li {
  color: rgba(255,255,255,0.72);
}

.plan-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

.pricing-note {
  margin-top: 40px;
  font-size: 15px;
  color: var(--fg-muted);
  font-style: italic;
}

/* --- Closing --- */
.closing {
  padding: 96px 48px;
  background: var(--navy);
  color: var(--white);
  text-align: center;
}

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

.closing-headline {
  font-size: clamp(32px, 4vw, 52px);
  color: var(--white);
  max-width: 700px;
  margin: 0 auto 28px;
}

.closing-body {
  font-size: 18px;
  color: rgba(255,255,255,0.65);
  max-width: 620px;
  margin: 0 auto 16px;
  line-height: 1.7;
}

.closing-cta {
  margin-top: 40px;
}

/* --- Contact Page --- */
.contact-page {
  padding: 80px 48px;
  max-width: 700px;
  margin: 0 auto;
}

.contact-page .section-label {
  margin-bottom: 12px;
}

.contact-page .section-title {
  margin-bottom: 12px;
}

.contact-page .section-sub {
  font-size: 18px;
  color: var(--fg-muted);
  margin-bottom: 48px;
  line-height: 1.7;
}

.contact-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid rgba(15,25,35,0.08);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  font-family: 'Instrument Sans', system-ui, sans-serif;
  border: 1px solid rgba(15,25,35,0.15);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--fg);
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  color: #065f46;
  font-size: 16px;
  margin-bottom: 24px;
}

/* --- Footer --- */
.footer {
  padding: 40px 48px;
  border-top: 1px solid rgba(15,25,35,0.08);
  text-align: center;
}

.footer-brand {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 18px;
  color: var(--navy);
  margin-bottom: 4px;
}

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

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

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
}

@media (max-width: 600px) {
  .hero, .howitworks, .features, .pricing, .closing, .footer {
    padding-left: 24px;
    padding-right: 24px;
  }
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .nav { padding-left: 24px; padding-right: 24px; }
}