:root {
  color-scheme: dark;
  --bg: #09121e;
  --panel: #142338;
  --line: #25384d;
  --text: #e5effd;
  --muted: #8ca6c7;
  --subtle: #6e8fb5;
  --cyan: #80c6e8;
  --green: #8de5b5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(
    ellipse 90% 65% at 50% -25%,
    #1a3453 0%,
    var(--bg) 72%
  );
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  letter-spacing: .01em;
}

a { color: inherit; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.site-shell {
  max-width: 1500px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 36px;
  display: flex;
  flex-direction: column;
}

.site-header {
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 15px;
  text-decoration: none;
  white-space: nowrap;
  font-size: 25px;
  font-weight: 700;
  letter-spacing: -.04em;
}

.brand strong {
  color: var(--cyan);
  font-weight: 700;
}

.brand-logo {
  width: 62px;
  height: 62px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s;
}

.site-nav a:hover,
.site-nav a.current {
  color: var(--cyan);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 12px;
  background: var(--panel);
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
}

.site-footer {
  margin-top: auto;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .12em;
}

@media (max-width: 950px) {
  .site-header { flex-wrap: wrap; padding: 18px 0; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 4px; }
}

@media (max-width: 600px) {
  .site-shell { padding: 0 18px; }
  .brand { font-size: 20px; gap: 10px; }
  .brand-logo { width: 48px; height: 48px; }
}