* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #111827;
  color: #e5e7eb;
}

a {
  color: #93c5fd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: #0f172a;
  border-bottom: 1px solid #1f2937;
}

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

.logo-link {
  font-size: 22px;
  font-weight: 700;
  color: #f8fafc;
}

.top-nav {
  display: flex;
  gap: 18px;
}

.top-nav a {
  color: #cbd5e1;
}

.site-main {
  padding: 32px 0;
}

.site-footer {
  border-top: 1px solid #1f2937;
  background: #0f172a;
  margin-top: 40px;
}

.footer-inner {
  min-height: 60px;
  display: flex;
  align-items: center;
  color: #94a3b8;
}

.hero-box {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 24px;
}

.hero-box h1 {
  margin-top: 0;
  margin-bottom: 12px;
  color: #f8fafc;
}

.hero-box p {
  margin: 0 0 10px 0;
  color: #cbd5e1;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.content-card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 20px;
}

.content-card h2 {
  margin-top: 0;
  color: #f8fafc;
}

.content-card p {
  color: #cbd5e1;
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 0;
  }
}