:root {
  --primary: #5e3fde;
  --secondary: #313131;
  --base: #434343;
  --bg: #ffffff;
  --tertiary: #f6f6f6;
  --quaternary: #e7e7e7;
  --black: #000000;
  --radius: 10px;
  --max: 1200px;
  --gap-xxl: 6rem;
}

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

body {
  font-family: 'Roboto', sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--base);
  background: var(--bg);
  padding-top: 73px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  color: var(--secondary);
  line-height: 1.3;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

.wide { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.section { padding: var(--gap-xxl) 20px; }
.section--gray { background: var(--tertiary); }

/* HEADER */
header {
  background: var(--bg);
  padding: 1.5rem 20px;
  border-bottom: 1px solid var(--quaternary);
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transform: translateY(-100%);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

header.visible {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-link { text-decoration: none; display: flex; align-items: center; }
.logo-img { height: 40px; width: auto; display: block; }

nav ul { list-style: none; display: flex; gap: 2.5rem; align-items: center; }
nav a { color: var(--secondary); font-size: 0.95rem; text-decoration: none; transition: color 0.2s; }
nav a:hover { color: var(--primary); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: 1rem; }

.btn {
  display: inline-block;
  padding: 0.65em 1.4em;
  border-radius: 5px;
  font-family: 'Roboto', sans-serif;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s;
  line-height: 1;
}
.btn:hover { opacity: 0.85; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; border: none; }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-full { width: 100%; text-align: center; display: block; }

.cart-btn { background: none; border: none; cursor: pointer; color: var(--secondary); display: flex; align-items: center; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--secondary); }

/* HERO */
.hero { padding: 4rem 20px 5rem; }
.hero-inner { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 60fr 40fr; gap: 4rem; align-items: center; }
.hero-label { color: var(--primary); font-size: 1rem; margin-bottom: 0.5rem; }
.hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1.5rem; }
.hero p { margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-image img { border-radius: var(--radius); width: 100%; object-fit: cover; }

/* Section headers */
.section-header { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: end; margin-bottom: 2.5rem; }
.section-label { color: var(--primary); font-size: 1rem; margin-bottom: 0.25rem; }
.section-header h2 { margin-top: 0.25rem; font-size: clamp(1.5rem, 3vw, 2.2rem); }

/* Feature cards */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card { background: #fff; border-radius: var(--radius); padding: 2.5rem 2rem; }
.card-img { width: 120px; height: 120px; object-fit: cover; border-radius: 8px; margin: 0 auto 1.25rem; background: var(--tertiary); }
.card h2 { text-align: center; font-size: 1.1rem; font-weight: 600; margin-bottom: 0.75rem; }
.card p { font-size: 0.95rem; margin-bottom: 1rem; }

/* Integrations */
.integration-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
.integration-card { background: #fff; border: 1px solid var(--quaternary); border-radius: var(--radius); padding: 2rem 1.5rem; display: flex; align-items: center; justify-content: center; min-height: 120px; }
.integration-card img { max-height: 70px; max-width: 140px; width: auto; object-fit: contain; margin: 0 auto; }

/* Understanding */
.understanding-section { background: #fff; overflow: hidden; }

.understanding-row {
  display: flex;
  flex-direction: row;
  gap: 0;
  align-items: center;
  justify-content: center;
}
.understanding-row img {
  width: 50%;
  max-width: 400px;
  height: auto;
  border-radius: 0;
  display: block;
}
/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; align-items: center; }
.pricing-card { background: #fff; border: 1px solid var(--quaternary); border-radius: var(--radius); padding: 2.5rem 2rem; }
.pricing-card h2 { text-align: center; font-size: 1.15rem; margin-bottom: 0.25rem; }
.pricing-card .subtitle { text-align: center; font-style: italic; font-size: 0.9rem; color: #666; margin-bottom: 1.25rem; }
.price-row { display: flex; align-items: baseline; justify-content: center; gap: 0.35rem; margin-bottom: 1.5rem; }
.price-amount { font-size: 2.5rem; font-family: 'Montserrat', sans-serif; font-weight: 700; color: var(--secondary); }
.price-period { font-size: 0.95rem; padding-top: 1rem; }
.pricing-divider { border: none; border-top: 1px solid var(--quaternary); margin: 0.75rem 0; }
.pricing-features { text-align: center; font-size: 0.95rem; }
.pricing-card .btn { margin-top: 2rem; }

/* Blog */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.blog-post time { font-size: 0.85rem; color: #888; display: block; margin-bottom: 0.5rem; }
.blog-post h2 { font-size: 1rem; font-weight: 600; line-height: 1.4; }
.blog-post h2 a { color: var(--secondary); }
.blog-post h2 a:hover { color: var(--primary); }

/* CTA */
.cta-section { text-align: center; padding: var(--gap-xxl) 20px; background: var(--tertiary); }
.cta-section h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: 1rem; }
.cta-section p { max-width: 600px; margin: 0 auto 2rem; }

/* Footer */
footer { background: var(--black); color: #fff; padding: var(--gap-xxl) 20px; }
.footer-inner { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 60fr 40fr; gap: 3rem; }
.footer-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
footer h4 { color: #fff; font-family: 'Montserrat', sans-serif; font-size: 1rem; margin-bottom: 1rem; }
footer ul { list-style: none; line-height: 2; }
footer a { color: rgba(255,255,255,0.75); font-size: 0.9rem; }
footer a:hover { color: #fff; text-decoration: none; }
.footer-about p { color: rgba(255,255,255,0.75); font-size: 0.9rem; }
.footer-bottom { background: var(--black); border-top: 1px solid rgba(255,255,255,0.13); padding: 1rem 20px; text-align: center; color: rgba(255,255,255,0.5); font-size: 0.85rem; }

/* Prose pages */
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 2rem; }
.prose h3 { font-size: 1.1rem; margin-top: 2rem; margin-bottom: 0.5rem; }
.prose p { margin-bottom: 1rem; }
.prose ul { margin: 0.5rem 0 1rem 1.5rem; }
.prose ul li { margin-bottom: 0.25rem; }
.prose a { color: var(--primary); }

/* Subscribe gallery */
.subscribe-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2rem; }
.subscribe-gallery img { width: 100%; border-radius: var(--radius); border: 1px solid var(--quaternary); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .cards-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .integration-cards { grid-template-columns: repeat(3, 1fr); }
  .blog-grid { grid-template-columns: 1fr; }
  .section-header { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  nav { display: none; }
  nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: #fff;
    padding: 1rem 20px;
    border-bottom: 1px solid var(--quaternary);
    z-index: 99;
  }
  nav.open ul { flex-direction: column; gap: 1rem; }
  .menu-toggle { display: block; }
  .integration-cards { grid-template-columns: repeat(2, 1fr); }
  .footer-cols { grid-template-columns: 1fr; }
  .understanding-row { flex-direction: column; }
  .understanding-row img { width: 100%; }
}