:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #121826;
  --muted: #5b6477;
  --brand: #4f7cff;
  --brand-2: #6dd3a9;
  --ring: rgba(79, 124, 255, 0.25);
  --shadow: 0 14px 40px rgba(18, 24, 38, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(245, 247, 251, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(18, 24, 38, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.05rem;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--surface);
  padding: 4px;
  box-shadow: var(--shadow);
}

.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid rgba(18, 24, 38, 0.12);
  border-radius: 12px;
  padding: 8px 12px;
}

.hero {
  padding: 70px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
  gap: 36px;
}

.eyebrow {
  color: var(--brand);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  margin: 12px 0;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 16px;
}

h3 {
  margin: 0 0 8px;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--brand);
  color: white;
  box-shadow: 0 12px 30px rgba(79, 124, 255, 0.25);
}

.btn.secondary {
  background: var(--surface);
  border-color: rgba(18, 24, 38, 0.12);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(18, 24, 38, 0.12);
}

.section {
  padding: 50px 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 124, 255, 0.3);
}

.mock {
  background: linear-gradient(135deg, rgba(79, 124, 255, 0.12), rgba(109, 211, 169, 0.15));
  border-radius: var(--radius);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-weight: 600;
  border: 1px dashed rgba(18, 24, 38, 0.15);
}

.split {
  display: grid;
  gap: 26px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: center;
}

.feature-list {
  padding-left: 18px;
  color: var(--muted);
}

footer {
  margin-top: 40px;
  padding: 30px 0 50px;
  border-top: 1px solid rgba(18, 24, 38, 0.08);
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 10px;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(79, 124, 255, 0.12);
  color: var(--brand);
  font-weight: 600;
  font-size: 0.85rem;
}

.notice {
  background: rgba(79, 124, 255, 0.08);
  border: 1px solid rgba(79, 124, 255, 0.16);
  padding: 14px 16px;
  border-radius: 14px;
  color: var(--muted);
}

@media (max-width: 860px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: var(--surface);
    position: absolute;
    right: 4%;
    top: 70px;
    padding: 16px 20px;
    border-radius: 16px;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }
}