/* ============ Landing page ============ */

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(248, 249, 250, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-container);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: var(--sp-lg);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 36px; height: 36px; }
.brand-name {
  font-family: var(--font-head); font-size: 22px; font-weight: 700;
  color: var(--on-surface);
}
.brand-name span { color: var(--primary); }
.main-nav { display: flex; gap: var(--sp-lg); }
.main-nav a {
  color: var(--on-surface-variant); font-weight: 500; font-size: 14px;
  padding: 8px 4px;
}
.main-nav a:hover { color: var(--primary); }
.header-actions { display: flex; gap: var(--sp-sm); }

/* Hero */
.hero { padding: 72px 0 56px; overflow: hidden; }
.hero-inner {
  display: grid; grid-template-columns: 1.15fr .85fr;
  gap: var(--sp-xl); align-items: center;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 54px); font-weight: 700;
  letter-spacing: -0.25px; margin: var(--sp-md) 0;
}
.hero h1 em { font-style: normal; color: var(--primary); }
.hero-sub { font-size: 18px; color: var(--on-surface-variant); max-width: 54ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--sp-md); margin: var(--sp-lg) 0; }
.hero-bullets { list-style: none; display: grid; gap: 6px; font-size: 14px; color: var(--on-surface-variant); }

/* Hero mock chat */
.mock-chat {
  border-radius: var(--r-xl); padding: var(--sp-lg);
  box-shadow: var(--shadow-soft);
  display: grid; gap: 10px; max-width: 360px; margin-left: auto;
}
.mock-row {
  padding: 12px 16px; border-radius: var(--r-md); font-size: 14px;
  background: var(--surface-container-low);
}
.mock-plan {
  padding: 12px 16px; border-radius: var(--r-sm); font-size: 13px; font-weight: 600;
  border: 1.5px solid var(--outline-variant); color: var(--secondary);
  text-align: center;
}
.mock-plan.active { border-color: var(--primary); color: var(--primary); background: var(--primary-fixed); }
.mock-paid { background: var(--success-container); color: var(--success); font-weight: 600; }

/* Strip */
.strip { border-block: 1px solid var(--surface-container); background: var(--surface-container-lowest); }
.strip-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: var(--sp-lg) var(--sp-md); gap: var(--sp-md); text-align: center;
}
.strip-inner div { display: grid; gap: 2px; }
.strip-inner strong { font-family: var(--font-head); font-size: 16px; }
.strip-inner span { font-size: 13px; color: var(--on-surface-variant); }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--surface-container-low); }
.section-title {
  font-size: clamp(26px, 3.5vw, 34px); font-weight: 600; text-align: center;
}
.section-sub {
  text-align: center; color: var(--on-surface-variant);
  margin: var(--sp-sm) auto var(--sp-xl); max-width: 60ch;
}

/* Features */
.grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-md);
}
.feature h3 { font-size: 18px; margin: var(--sp-sm) 0; }
.feature p { font-size: 14px; color: var(--on-surface-variant); }
.feature-icon {
  width: 48px; height: 48px; display: grid; place-items: center;
  font-size: 22px; border-radius: var(--r-md);
  background: var(--primary-fixed);
}

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-md); }
.step { position: relative; padding-top: var(--sp-xl); }
.step h3 { font-size: 17px; margin-bottom: var(--sp-sm); }
.step p { font-size: 14px; color: var(--on-surface-variant); }
.step-num {
  position: absolute; top: -16px; left: var(--sp-lg);
  width: 40px; height: 40px; display: grid; place-items: center;
  background: var(--primary); color: var(--on-primary);
  font-family: var(--font-head); font-weight: 700; font-size: 18px;
  border-radius: var(--r-md); box-shadow: var(--shadow-soft);
}

/* Comparison */
.compare { overflow-x: auto; padding: var(--sp-md); }
.compare table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare th, .compare td { padding: 14px 16px; text-align: center; border-bottom: 1px solid var(--surface-container); }
.compare td:first-child { text-align: left; color: var(--on-surface-variant); }
.compare th { font-family: var(--font-head); font-size: 15px; }
.compare .highlight { background: var(--primary-fixed); color: var(--primary-dark); font-weight: 600; }
.compare tr:last-child td { border-bottom: none; }

/* Pricing */
.pricing {
  max-width: 480px; margin: 0 auto; text-align: center;
  border-radius: var(--r-xl); padding: var(--sp-xl);
  box-shadow: var(--shadow-soft);
}
.pricing-fee { margin-bottom: var(--sp-lg); }
.pricing-value {
  font-family: var(--font-head); font-size: 64px; font-weight: 700;
  color: var(--primary); display: block; line-height: 1;
}
.pricing-label { color: var(--on-surface-variant); font-size: 14px; }
.pricing-list {
  list-style: none; display: grid; gap: 10px; text-align: left;
  margin: 0 auto var(--sp-lg); max-width: 320px; font-size: 15px;
}
.pricing-note { font-size: 12px; color: var(--on-surface-variant); margin-top: var(--sp-md); }

/* FAQ */
.faq-list { max-width: 760px; margin: 0 auto; display: grid; gap: var(--sp-sm); }
.faq-list details { padding: 0; overflow: hidden; }
.faq-list summary {
  cursor: pointer; list-style: none; padding: 18px var(--sp-lg);
  font-family: var(--font-head); font-weight: 600; font-size: 16px;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-list summary::after { content: "+"; font-size: 22px; color: var(--primary); }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p {
  padding: 0 var(--sp-lg) 18px; font-size: 14px; color: var(--on-surface-variant);
}

/* Final CTA */
.cta-final {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: var(--on-primary); padding: 72px 0;
}
.cta-inner { text-align: center; display: grid; gap: var(--sp-md); justify-items: center; }
.cta-inner h2 { font-size: clamp(26px, 3.5vw, 36px); }
.cta-inner p { opacity: .9; }
.cta-btn { background: #fff; color: var(--primary-dark); }
.cta-btn:hover { filter: brightness(.96); }

/* Footer */
.site-footer { padding: var(--sp-xl) 0; background: var(--surface-container-lowest); border-top: 1px solid var(--surface-container); }
.footer-inner { display: grid; gap: var(--sp-md); justify-items: center; text-align: center; }
.footer-inner nav { display: flex; gap: var(--sp-lg); flex-wrap: wrap; }
.footer-inner nav a { color: var(--on-surface-variant); font-size: 14px; }
.footer-inner p { font-size: 13px; }

/* ============ Responsive ============ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: var(--sp-xl); }
  .strip-inner { grid-template-columns: repeat(2, 1fr); }
  .main-nav { display: none; }
}
@media (max-width: 600px) {
  .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .header-actions .btn-outline { display: none; }
  .section { padding: 56px 0; }
  .hero { padding: 48px 0 40px; }
}