@font-face {
  font-family: "Rethink Sans";
  src: url("../assets/fonts/rethink-sans-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Rethink Sans";
  src: url("../assets/fonts/rethink-sans-600.ttf") format("truetype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Rethink Sans";
  src: url("../assets/fonts/rethink-sans-700.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: light;
  --rb-bg: #f1f4fa;
  --rb-surface: #ffffff;
  --rb-surface-soft: #e8efff;
  --rb-hero-bg: #eaf0ff;
  --rb-section-tint: #e8efff;
  --rb-hover: #fafdff;
  --rb-ink: #111c35;
  --rb-muted: #5c687d;
  --rb-blue: #275de7;
  --rb-blue-dark: #1947bd;
  --rb-blue-hover: #1947bd;
  --rb-blue-soft: #e8efff;
  --rb-line: #dbe1eb;
  --rb-deep: #111c35;
  --rb-on-deep: #ffffff;
  --rb-deep-muted: #b9c4d6;
  --rb-footer-bg: #111c35;
  --rb-header-bg: rgba(241, 244, 250, 0.95);
  --rb-scroll-thumb: #aeb9ca;
  --rb-radius: 14px;
  --rb-page: min(1180px, calc(100% - 48px));
}

html { scroll-padding-top: 76px; }

html[data-theme="dark"] {
  color-scheme: dark;
  --rb-bg: #08101d;
  --rb-surface: #101a2c;
  --rb-surface-soft: #16274c;
  --rb-hero-bg: #0d1830;
  --rb-section-tint: #0d1930;
  --rb-hover: #152139;
  --rb-ink: #f1f5fb;
  --rb-muted: #a7b3c7;
  --rb-blue: #3b65d3;
  --rb-blue-dark: #a9c0ff;
  --rb-blue-hover: #2b50ad;
  --rb-blue-soft: #17294f;
  --rb-line: #28354c;
  --rb-deep: #0d1730;
  --rb-on-deep: #f4f7fc;
  --rb-deep-muted: #b4c1d4;
  --rb-footer-bg: #060c18;
  --rb-header-bg: rgba(8, 16, 29, 0.94);
  --rb-scroll-thumb: #56657c;
}

#rb-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
}

.rb-nav {
  position: relative;
  border-bottom: 1px solid transparent;
  background: transparent;
  color: var(--rb-ink);
  transition: border-color 180ms ease, background-color 180ms ease;
}
.rb-nav.is-scrolled,
.rb-nav.is-menu-open { border-color: var(--rb-line); background: var(--rb-header-bg); }
.rb-nav-inner {
  display: grid;
  width: var(--rb-page);
  min-height: 76px;
  grid-template-columns: 1fr auto auto;
  gap: 2rem;
  align-items: center;
  margin: 0 auto;
}
.rb-logo {
  width: max-content;
  color: var(--rb-ink);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  text-decoration: none;
}
.rb-logo span { color: var(--rb-blue); }
.rb-nav-links { display: flex; gap: 2rem; align-items: center; }
.rb-nav-links a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--rb-muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 160ms ease;
}
.rb-nav-links a::after {
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 2px;
  background: var(--rb-blue);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 160ms ease;
}
.rb-nav-links a:hover, .rb-nav-links a[aria-current="page"] { color: var(--rb-ink); }
.rb-nav-links a:hover::after, .rb-nav-links a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.rb-nav-cta {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--rb-deep);
  color: var(--rb-on-deep);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 160ms ease, transform 160ms ease;
}
.rb-nav-cta:hover { background: var(--rb-blue); transform: translateY(-1px); }
.rb-nav-actions { display: flex; gap: 0.75rem; align-items: center; justify-self: end; }
.rb-theme-toggle {
  display: grid;
  width: 44px;
  height: 44px;
  flex: none;
  place-items: center;
  padding: 0;
  border: 1px solid var(--rb-line);
  border-radius: 10px;
  background: var(--rb-surface);
  color: var(--rb-ink);
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.rb-theme-toggle:hover { border-color: var(--rb-blue); color: var(--rb-blue-dark); transform: translateY(-1px); }
.rb-theme-icon { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.rb-theme-icon-sun { display: none; }
.rb-theme-icon-moon { display: block; }
html[data-theme="dark"] .rb-theme-icon-sun { display: block; }
html[data-theme="dark"] .rb-theme-icon-moon { display: none; }
.rb-menu-toggle {
  position: relative;
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--rb-line);
  border-radius: 10px;
  background: var(--rb-surface);
  color: var(--rb-ink);
}
.rb-menu-toggle span {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 160ms ease;
}
.rb-menu-toggle span:first-child { transform: translateY(-3px); }
.rb-menu-toggle span:last-child { transform: translateY(3px); }
.rb-menu-toggle[aria-expanded="true"] span:first-child { transform: rotate(45deg); }
.rb-menu-toggle[aria-expanded="true"] span:last-child { transform: rotate(-45deg); }

.rb-footer { border-top: 1px solid #25324a; background: var(--rb-footer-bg); color: #fff; }
.rb-footer-inner {
  display: grid;
  width: var(--rb-page);
  grid-template-columns: 1.3fr 0.7fr 0.8fr;
  gap: 4rem;
  margin: 0 auto;
  padding: 4.5rem 0 2rem;
}
.rb-footer-logo { color: #fff; }
.rb-footer-intro p { max-width: 38ch; margin: 1.2rem 0 0; color: #b7c2d4; line-height: 1.65; }
.rb-footer-links { display: grid; align-content: start; gap: 0.75rem; }
.rb-footer-links a { color: #dce4f1; font-size: 0.9rem; text-decoration: none; }
.rb-footer-links a:hover { color: #fff; }
.rb-footer-contact { display: grid; align-content: start; gap: 0.7rem; }
.rb-footer-contact span { color: #9eabc0; font-size: 0.78rem; }
.rb-footer-contact a { color: #fff; font-size: 0.9rem; font-weight: 600; text-decoration: none; overflow-wrap: anywhere; }
.rb-footer-contact a:hover { color: #b8caff; }
.rb-footer-meta {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #2c3952;
  color: #8f9db2;
  font-size: 0.76rem;
}
.rb-footer-meta a { color: #c6d0df; text-decoration: underline; text-underline-offset: 0.25rem; }

@media (max-width: 900px) {
  .rb-nav-inner { grid-template-columns: 1fr auto auto; gap: 0.75rem; }
  .rb-nav-cta { display: none; }
  .rb-nav-actions { grid-column: 2; grid-row: 1; }
  .rb-menu-toggle { grid-column: 3; grid-row: 1; }
  .rb-menu-toggle { display: grid; }
  .rb-nav-links {
    position: absolute;
    top: 76px;
    left: 0;
    display: grid;
    width: 100%;
    gap: 0;
    padding: 1rem max(24px, calc((100vw - min(1180px, 100% - 48px)) / 2)) 1.5rem;
    visibility: hidden;
    border-bottom: 1px solid var(--rb-line);
    background: var(--rb-bg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  }
  .rb-nav-links.is-open { visibility: visible; opacity: 1; pointer-events: auto; transform: translateY(0); }
  .rb-nav-links a { padding: 0.65rem 0; }
  .rb-nav-links a::after { display: none; }
  .rb-footer-inner { grid-template-columns: 1fr 1fr; }
  .rb-footer-intro { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  :root { --rb-page: min(100% - 32px, 1180px); }
  .rb-footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .rb-footer-intro { grid-column: auto; }
  .rb-footer-meta { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 380px) {
  .rb-nav-inner { gap: 0.45rem; }
  .rb-theme-toggle, .rb-menu-toggle { width: 42px; height: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  .rb-nav-links,
  .rb-nav-links a::after,
  .rb-menu-toggle span,
  .rb-nav-cta,
  .rb-theme-toggle { transition-duration: 0.01ms; }
}