:root {
  --bg:        #0A0E14;
  --bg-alt:    #0E131C;
  --card:      #131826;
  --border:    #212938;
  --text:      #F2F5FA;
  --text-dim:  #8B93A7;
  --accent:    #4F8DFF;
  --accent-2:  #34D399;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 760px; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0 0 16px; line-height: 1.15; }
h1 { font-size: 52px; }
h2 { font-size: 34px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin-bottom: 8px; }
p { margin: 0 0 12px; color: var(--text-dim); }
.body-lg { font-size: 17px; line-height: 1.65; max-width: 46ch; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

.eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent-2); margin-bottom: 12px;
}

/* header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(10, 14, 20, 0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 17px;
  color: var(--text); text-decoration: none;
}
.brand svg { color: var(--accent); }
.main-nav { display: flex; gap: 28px; }
.main-nav a { color: var(--text-dim); text-decoration: none; font-size: 14px; font-weight: 500; }
.main-nav a:hover { color: var(--text); }
.header-cta { display: flex; align-items: center; gap: 12px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; border-radius: 8px; font-weight: 600; font-size: 14px;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #3d7aef; }
.btn-ghost { color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--text-dim); }
.btn-outline { color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { padding: 14px 26px; font-size: 15px; }

/* hero */
.hero { padding: 96px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.hero-sub { font-size: 18px; line-height: 1.65; max-width: 46ch; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 22px; }
.hero-disclaimer { font-size: 13px; color: #5B6478; max-width: 42ch; }
.hero-visual { display: flex; justify-content: center; }

/* sections */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section > .wrap > h2 { max-width: 640px; }

.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }

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

.diff-sub { max-width: 640px; margin-top: -8px; margin-bottom: 8px; }
.diff-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.diff-card {
  background: linear-gradient(160deg, rgba(79,141,255,0.08), rgba(52,211,153,0.04));
  border: 1px solid var(--accent); border-radius: 14px; padding: 32px;
}
.diff-icon { width: 46px; height: 46px; border-radius: 10px; background: rgba(79,141,255,0.18); margin-bottom: 18px; }
.diff-card h3 { font-size: 20px; }
.diff-card p { font-size: 15px; line-height: 1.7; }
.diff-disclaimer { text-align: center; font-size: 13px; color: #5B6478; max-width: 640px; margin: 36px auto 0; }
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 26px; }
.feature-icon {
  width: 40px; height: 40px; border-radius: 9px; background: rgba(79, 141, 255, 0.12);
  color: var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.feature-card p { font-size: 14px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--accent);
  color: var(--accent); font-family: var(--font-mono); font-size: 13px; margin-bottom: 16px;
}
.step p { font-size: 14px; }

/* pricing */
.pricing-sub { margin-top: -8px; margin-bottom: 40px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.price-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 28px; position: relative; display: flex; flex-direction: column;
}
.price-card-featured { border-color: var(--accent); }
.price-badge {
  position: absolute; top: -12px; left: 24px; background: var(--accent); color: #fff;
  font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 999px; margin: 0;
}
.price { font-family: var(--font-display); font-size: 16px; color: var(--text-dim); margin: 4px 0 6px; }
.price span { font-size: 32px; color: var(--text); font-weight: 600; }
.price-note { font-size: 13px; margin-bottom: 18px; }
.price-card ul { list-style: none; padding: 0; margin: 0; flex: 1; }
.price-card li {
  font-size: 14px; color: var(--text); padding: 8px 0 8px 22px; position: relative;
  border-top: 1px solid var(--border);
}
.price-card li:first-child { border-top: none; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 700; }
.pricing-footnote { text-align: center; font-size: 13px; color: #5B6478; margin-top: 32px; }

/* faq */
.faq-list { margin-top: 40px; }
.faq-list details {
  border-bottom: 1px solid var(--border); padding: 18px 0;
}
.faq-list summary {
  cursor: pointer; font-family: var(--font-display); font-weight: 600; font-size: 16px;
  color: var(--text); list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--accent); font-size: 20px; font-weight: 400; }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p { margin-top: 12px; font-size: 14px; max-width: 60ch; }

/* CTA */
.cta-section { text-align: center; }
.cta-inner { max-width: 560px; margin: 0 auto; }
.cta-inner .body-lg { margin: 0 auto 28px; }

.contact-form { display: flex; flex-direction: column; gap: 12px; max-width: 420px; margin: 0 auto; text-align: left; }
.contact-form input, .contact-form textarea {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 12px 14px; font-family: var(--font-body); font-size: 14px; resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }
.contact-form .btn { align-self: flex-start; }
.contact-status { font-size: 13px; margin: 4px 0 0; min-height: 18px; }
.contact-status.success { color: var(--accent-2); }
.contact-status.error { color: #F87171; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0; background: var(--bg-alt); }
.footer-inner { display: flex; flex-direction: column; gap: 20px; }
.footer-brand { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-brand p { margin: 0; font-size: 13px; }
.footer-disclaimer { font-size: 12px; color: #5B6478; max-width: 780px; line-height: 1.6; margin: 0; }

/* responsive */
@media (max-width: 860px) {
  .main-nav { display: none; }
  h1 { font-size: 38px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .solution-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .feature-grid, .steps { grid-template-columns: 1fr; }
  h1 { font-size: 32px; }
  .hero-actions { flex-direction: column; }
  .header-inner { height: auto; padding: 14px 20px; flex-wrap: nowrap; }
  .brand { font-size: 14px; white-space: nowrap; }
  .brand svg { width: 18px; height: 18px; flex-shrink: 0; }
  .header-cta .btn-ghost { display: none; }
  .header-cta .btn { padding: 9px 14px; font-size: 13px; white-space: nowrap; }
}