:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --ink: #1c2530;
  --muted: #5c6b7a;
  --line: #e2e8f0;
  --brand: #1f5fae;
  --brand-dark: #16457f;
  --accent: #0fb28f;
  --radius: 10px;
  --wrap: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}
img, svg { max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand span { color: var(--brand); }
nav.main a {
  color: var(--muted);
  margin-left: 22px;
  font-size: 0.96rem;
  font-weight: 500;
}
nav.main a:hover { color: var(--brand); text-decoration: none; }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--bg-alt), #eef3f9);
  border-bottom: 1px solid var(--line);
  padding: 84px 0;
}
.hero h1 { font-size: 2.5rem; line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.5px; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 620px; margin: 0 0 28px; }

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  border: 1px solid var(--brand-dark);
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--brand); }
.btn.ghost:hover { background: #fff; }

/* Sections */
section.block { padding: 64px 0; }
section.block.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: 1.9rem; letter-spacing: -0.3px; margin: 0 0 8px; }
.section-intro { color: var(--muted); max-width: 640px; margin: 0 0 36px; }

/* Cards grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; }
.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card .ico { width: 40px; height: 40px; margin-bottom: 14px; color: var(--brand); }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.98rem; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 20px; text-align: center; }
.stat .num { font-size: 2.2rem; font-weight: 700; color: var(--brand); }
.stat .lbl { color: var(--muted); font-size: 0.92rem; }

/* Article / prose */
.prose { max-width: 760px; margin: 0 auto; }
.prose h1 { font-size: 2.1rem; letter-spacing: -0.4px; margin: 0 0 12px; }
.prose h2 { font-size: 1.4rem; margin: 34px 0 10px; }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.meta { color: var(--muted); font-size: 0.92rem; margin-bottom: 28px; }

/* Post list */
.posts { list-style: none; padding: 0; margin: 0; }
.posts li { border-bottom: 1px solid var(--line); padding: 22px 0; }
.posts h3 { margin: 0 0 4px; font-size: 1.25rem; }
.posts .meta { margin: 0; }

/* Contact / forms */
.field { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.95rem; }
input, textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line);
  border-radius: 8px; font: inherit; background: var(--bg-alt);
}
input:focus, textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }

/* Footer */
.site-footer {
  background: #10202f; color: #b9c6d3; padding: 48px 0 32px; font-size: 0.94rem;
}
.site-footer a { color: #d7e3ee; }
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 28px; }
.footer-cols h4 { color: #fff; font-size: 0.95rem; margin: 0 0 12px; }
.footer-cols ul { list-style: none; padding: 0; margin: 0; }
.footer-cols li { margin: 6px 0; }
.footer-bottom { border-top: 1px solid #23384a; padding-top: 20px; color: #8095a6; }

@media (max-width: 720px) {
  .hero { padding: 56px 0; }
  .hero h1 { font-size: 1.9rem; }
  nav.main a { margin-left: 14px; font-size: 0.88rem; }
  .footer-cols { grid-template-columns: 1fr; }
}