@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Lobster&display=swap');

:root {
  --site-font-body: "Google Sans", "Segoe UI", sans-serif;
  --site-font-display: "Lobster", cursive;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --surface-strong: rgba(255, 255, 255, 0.84);
  --surface-line: rgba(92, 108, 148, 0.18);
  --surface-shadow: 0 14px 30px rgba(20, 28, 56, 0.12);
  --nav-ink: #1d2849;
  --nav-soft: #607099;
  --nav-pill: #edf2ff;
  --nav-pill-line: #cfd8fb;
  --nav-active: #1a2960;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--site-font-body);
}

a {
  color: inherit;
}

.site-nav-wrap {
  max-width: 1280px;
  margin: 16px auto 0;
  padding: 0 20px;
  position: sticky;
  top: 10px;
  z-index: 30;
}

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 12px;
  border: 1px solid var(--surface-line);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  backdrop-filter: blur(14px);
  box-shadow: var(--surface-shadow);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--nav-ink);
  min-width: 0;
}

.site-brand-mark {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f7f9ff;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #1a2f73 0%, #2f63df 100%);
  box-shadow: 0 10px 18px rgba(24, 52, 145, 0.24);
}

.site-brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.site-brand-copy strong {
  font-size: 0.96rem;
  font-weight: 700;
  line-height: 1.1;
}

.site-brand-copy span {
  color: var(--nav-soft);
  font-size: 0.76rem;
  line-height: 1.1;
}

.site-nav-toggle {
  display: none;
}

.site-nav-button {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--nav-pill-line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  cursor: pointer;
}

.site-nav-button span {
  width: 18px;
  height: 2px;
  background: var(--nav-ink);
  border-radius: 2px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--nav-ink);
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.site-nav-links a:hover {
  background: var(--nav-pill);
  border-color: var(--nav-pill-line);
}

.site-nav-links a.is-active {
  background: var(--nav-active);
  border-color: var(--nav-active);
  color: #f5f7ff;
}

.site-nav-links a.is-accent {
  background: var(--nav-pill);
  border-color: var(--nav-pill-line);
}

@media (max-width: 860px) {
  .site-nav-wrap {
    padding: 0 14px;
  }

  .site-nav-button {
    display: inline-flex;
  }

  .site-nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    padding: 12px;
    border: 1px solid var(--surface-line);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--surface-shadow);
    flex-direction: column;
  }

  .site-nav-links a {
    width: 100%;
  }

  .site-nav-toggle:checked ~ .site-nav-links {
    display: flex;
  }
}

@media (max-width: 620px) {
  .site-brand-copy span {
    display: none;
  }
}

.site-credit {
  max-width: 1280px;
  margin: 28px auto 24px;
  padding: 0 20px;
  text-align: center;
  color: #607099;
  font-size: 0.95rem;
  line-height: 1.6;
}

.site-credit a {
  color: #1a2960;
  font-weight: 700;
  text-decoration: none;
}

.site-credit a:hover {
  text-decoration: underline;
}