@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

:root {
  --primary: #2563EB;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --neutral-900: #0f172a;
  --neutral-700: #334155;
  --neutral-500: #64748b;
  --neutral-300: #cbd5e1;
  --neutral-100: #f1f5f9;
  --neutral-50: #f8fafc;
  --white: #ffffff;
  --success: #16a34a;
  --radius: 8px;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--neutral-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--neutral-300);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-mark svg { color: #fff; }
.logo-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--neutral-900);
  letter-spacing: -0.01em;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  background: var(--primary);
  color: var(--white);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s;
}
.nav-cta:hover { background: var(--primary-dark); }

/* ── Hero ── */
.hero {
  padding: 80px 0 72px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--white) 100%);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
  letter-spacing: 0.01em;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  color: var(--neutral-900);
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 780px;
  margin: 0 auto 20px;
}
.hero h1 span { color: var(--primary); }
.hero p {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--neutral-500);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.65;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  background: var(--primary);
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  background: var(--white);
  color: var(--neutral-700);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--neutral-50); }

/* ── Features ── */
.features {
  padding: 80px 0;
  background: var(--white);
}
.section-label {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  text-align: center;
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  color: var(--neutral-900);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  font-size: 16px;
  color: var(--neutral-500);
  max-width: 520px;
  margin: 0 auto 56px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  padding: 28px;
  border: 1px solid var(--neutral-300);
  border-radius: 12px;
  background: var(--white);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.feature-card:hover {
  border-color: #bfdbfe;
  box-shadow: 0 4px 16px rgba(37,99,235,0.08);
}
.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--neutral-900);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.feature-card p {
  font-size: 14px;
  color: var(--neutral-500);
  line-height: 1.6;
}

/* ── SP-API section ── */
.spapi-section {
  padding: 72px 0;
  background: var(--neutral-50);
  border-top: 1px solid var(--neutral-300);
  border-bottom: 1px solid var(--neutral-300);
}
.spapi-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.spapi-inner h2 {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  color: var(--neutral-900);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.spapi-inner p {
  font-size: 15px;
  color: var(--neutral-500);
  line-height: 1.7;
  margin-bottom: 16px;
}
.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--neutral-700);
}
.check-list li::before {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--success);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 1px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L19 7'/%3E%3C/svg%3E");
  background-size: 11px;
  background-repeat: no-repeat;
  background-position: center;
}
.spapi-visual {
  background: var(--white);
  border: 1px solid var(--neutral-300);
  border-radius: 12px;
  padding: 32px;
}
.spapi-visual .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  padding: 5px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid #bfdbfe;
}

/* ── CTA ── */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: var(--primary);
}
.cta-section h2 {
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}
.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--white);
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: opacity 0.15s, transform 0.1s;
}
.btn-white:hover { opacity: 0.92; transform: translateY(-1px); }

/* ── Footer ── */
footer {
  background: var(--neutral-900);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.footer-logo .logo-name { color: var(--white); font-size: 15px; }
.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 13px;
  color: var(--neutral-500);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--neutral-300); }
.footer-copy {
  font-size: 12px;
  color: var(--neutral-500);
  width: 100%;
  margin-top: 8px;
}

/* ── Legal pages ── */
.legal-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--neutral-300);
  background: var(--neutral-50);
}
.legal-hero h1 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  color: var(--neutral-900);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.legal-meta {
  font-size: 14px;
  color: var(--neutral-500);
}
.legal-body {
  padding: 56px 0 80px;
}
.legal-content {
  max-width: 740px;
}
.legal-content h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--neutral-900);
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--neutral-100);
}
.legal-content h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.legal-content p {
  font-size: 15px;
  color: var(--neutral-700);
  line-height: 1.75;
  margin-bottom: 14px;
}
.legal-content ul, .legal-content ol {
  margin: 0 0 14px 20px;
}
.legal-content li {
  font-size: 15px;
  color: var(--neutral-700);
  line-height: 1.75;
  margin-bottom: 6px;
}
.legal-content a {
  color: var(--primary);
  text-decoration: none;
}
.legal-content a:hover { text-decoration: underline; }
.legal-content strong { font-weight: 600; color: var(--neutral-900); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .spapi-inner { grid-template-columns: 1fr; gap: 32px; }
  .spapi-visual { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .nav-cta { display: none; }
  .hero { padding: 56px 0 48px; }
  .features { padding: 56px 0; }
}