:root {
  --site-header-height: 86px;
  --site-header-ink: #1c1e38;
  --site-header-muted: #626783;
  --site-header-paper: #faf9f5;
  --site-header-line: #deddea;
  --site-header-lavender: #e9e5ff;
  --site-header-accent: #7664d8;
}

:root[data-theme='dark'] {
  --site-header-ink: #f5f3ff;
  --site-header-muted: #c6c3d5;
  --site-header-paper: #171723;
  --site-header-line: #414053;
  --site-header-lavender: #2b2944;
  --site-header-accent: #c2b6ff;
}

.site-nav {
  position: relative;
  z-index: 30;
  width: min(1180px, calc(100% - 40px));
  height: var(--site-header-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--site-header-ink);
  background: var(--site-header-paper);
  font-family: 'DM Sans', system-ui, sans-serif;
}

.site-nav .brand {
  min-width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--site-header-ink);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -.04em;
  text-decoration: none;
}

.site-nav .brand-mark {
  width: 33px;
  height: 33px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 11px;
  color: #fff;
  background: #1c1e38;
  font: 600 1.25rem Fraunces, serif;
  transform: rotate(-7deg);
}

.site-nav .brand em { color: var(--site-header-accent); font-style: normal; }
.site-nav .nav-links { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.site-nav .nav-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 5px;
  color: var(--site-header-muted);
  font-size: .94rem;
  font-weight: 600;
  text-decoration: none;
}
.site-nav .nav-links a:hover,
.site-nav .nav-links a[aria-current='page'] { color: var(--site-header-ink); }
.site-nav .mobile-menu { display: none; }
.site-nav .nav-cta { display: none; }

.site-nav .nav-links .nav-tool-link {
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid var(--site-header-line);
  border-radius: 999px;
  color: var(--site-header-ink);
  background: #fff;
  font-size: .8rem;
  white-space: nowrap;
}
.site-nav .nav-links .nav-tool-link[data-nav-tool='tutor'] {
  border-color: #1c1e38;
  color: #fff;
  background: #1c1e38;
}
.site-nav .nav-links .nav-tool-link[data-nav-tool='calculator'] {
  border-color: #5142ad;
  color: #fff;
  background: #5142ad;
}

:root[data-theme='dark'] .site-nav .brand-mark { color: #1c1e38; background: #f5f3ff; }
:root[data-theme='dark'] .site-nav .nav-links .nav-tool-link { border-color: #58566e; background: #242432; }
:root[data-theme='dark'] .site-nav .nav-links .nav-tool-link[data-nav-tool='tutor'] { border-color: #f5f3ff; color: #1c1e38; background: #f5f3ff; }
:root[data-theme='dark'] .site-nav .nav-links .nav-tool-link[data-nav-tool='calculator'] { border-color: #7664d8; color: #fff; background: #5b4db6; }

@media (max-width:1080px) and (min-width:921px) {
  .site-nav { gap: 13px; }
  .site-nav .nav-links { gap: 7px; }
  .site-nav .nav-links a { font-size: .85rem; }
  .site-nav .nav-links .nav-tool-link { padding-inline: 7px; font-size: .74rem; }
}

@media (max-width:920px) {
  :root { --site-header-height: 72px; }
  .site-nav { width: min(100% - 28px, 1180px); gap: 10px; }
  .site-nav .nav-links,
  .site-nav .nav-cta { display: none; }
  .site-nav .mobile-menu { position: relative; display: block; }
  .site-nav .mobile-menu summary {
    min-width: 96px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 13px;
    list-style: none;
    border: 1px solid #1c1e38;
    border-radius: 12px;
    color: #fff;
    background: #1c1e38;
    font-size: .92rem;
    font-weight: 700;
    cursor: pointer;
  }
  .site-nav .mobile-menu summary::-webkit-details-marker { display: none; }
  .site-nav .mobile-menu summary::after {
    width: 7px;
    height: 7px;
    margin: 0 0 4px 11px;
    border-right: 2px solid #ffc0b0;
    border-bottom: 2px solid #ffc0b0;
    content: '';
    transform: rotate(45deg);
  }
  .site-nav .mobile-menu[open] summary { border-color: #7664d8; background: #7664d8; }
  .site-nav .mobile-menu-list {
    position: absolute;
    top: calc(100% + 9px);
    right: 0;
    z-index: 40;
    width: min(268px, calc(100vw - 28px));
    display: grid;
    padding: 7px;
    border: 1px solid var(--site-header-line);
    border-radius: 15px;
    background: var(--site-header-paper);
    box-shadow: 0 16px 32px rgb(28 30 56 / .16);
  }
  .site-nav .mobile-menu-link {
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 0 13px;
    border: 0;
    border-radius: 10px;
    color: var(--site-header-ink);
    background: transparent;
    font-size: .95rem;
    font-weight: 600;
    text-decoration: none;
  }
  .site-nav .mobile-menu-link:hover,
  .site-nav .mobile-menu-link:focus-visible { color: var(--site-header-ink); background: var(--site-header-lavender); }
  .site-nav .mobile-menu-link[aria-current='page'] { color: #fff; background: #1c1e38; }
  .site-nav .mobile-menu-link.nav-tool-link[data-nav-tool='tutor'] { color: #fff; background: #1c1e38; }
  .site-nav .mobile-menu-link.nav-tool-link[data-nav-tool='calculator'] { color: #fff; background: #5142ad; }
  :root[data-theme='dark'] .site-nav .mobile-menu-link[aria-current='page'],
  :root[data-theme='dark'] .site-nav .mobile-menu-link.nav-tool-link[data-nav-tool='tutor'] { color: #1c1e38; background: #f5f3ff; }
}

@media (max-width:480px) {
  .site-nav { gap: 8px; }
  .site-nav .brand { gap: 8px; font-size: .92rem; }
  .site-nav .brand-mark { width: 29px; height: 29px; font-size: 1.08rem; }
  .site-nav .mobile-menu summary { min-width: 84px; padding-inline: 10px; }
}

@media (max-width:360px) {
  .site-nav .brand { gap: 0; font-size: 0; }
}