:root {
  --bg: #0a0e1d;
  --panel: #131a30;
  --border: #232c4a;
  --text: #eef1f8;
  --muted: #9aa3bd;
  --cyan: #26bff2;
  --lime: #99f24d;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, #070a14 0%, #0d1226 60%, #171033 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: 820px; margin: 0 auto; padding: 0 20px; }

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.3px;
}
.logo span {
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

nav.site a {
  color: var(--muted);
  margin-left: 20px;
  font-size: 15px;
  font-weight: 500;
}
nav.site a:hover { color: var(--text); text-decoration: none; }

.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 { font-size: 42px; line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.5px; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { font-size: 18px; color: var(--muted); max-width: 580px; margin: 0 auto 28px; }

.hero-mark { width: 84px; height: 84px; margin: 0 auto 18px; display: block; }

.btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  color: #06101c;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: 999px;
}
.btn:hover { filter: brightness(1.1); text-decoration: none; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 24px 0 56px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.content { padding: 40px 0 64px; }
.content h1 { font-size: 32px; margin: 0 0 6px; }
.content h2 { font-size: 20px; margin: 28px 0 8px; }
.content p, .content li { color: var(--muted); font-size: 15.5px; }
.content .updated { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.content strong { color: var(--text); }

.contact-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 18px 0;
}

footer.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  flex-wrap: wrap;
  gap: 8px;
}
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--text); }