:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #1a2330;
  --muted: #5b6573;
  --accent: #1b6ef3;
  --accent-dark: #1550c0;
  --border: #e2e8f0;
  --max-width: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--accent);
}

.nav a {
  margin-left: 24px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--accent);
}

/* Hero */
.hero {
  padding: 96px 0;
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
}

.hero h1 {
  font-size: 2.6rem;
  line-height: 1.2;
  letter-spacing: -1px;
  max-width: 720px;
}

.hero .lead {
  margin-top: 20px;
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 640px;
}

.btn {
  display: inline-block;
  margin-top: 32px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 13px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
}

.btn:hover {
  background: var(--accent-dark);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  font-size: 2rem;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-intro {
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 32px;
  font-size: 1.1rem;
}

.section p {
  color: var(--muted);
  max-width: 720px;
}

/* Grid of cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  font-size: 0.97rem;
}

/* Check list */
.check-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px 32px;
}

.check-list li {
  padding-left: 28px;
  position: relative;
  color: var(--text);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Contact */
.contact-email {
  margin-top: 16px;
  font-size: 1.2rem;
}

.contact-email a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.contact-email a:hover {
  text-decoration: underline;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
  .nav {
    display: none;
  }

  .hero {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 56px 0;
  }
}