.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  padding: 0;
  pointer-events: none;
}

.site-header .navbar,
.site-header .mobile-menu {
  pointer-events: auto;
}

.navbar {
  width: 100%;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid rgba(229, 229, 229, 0.92);
  border-top: none;
  border-left: none;
  border-right: none;
  border-radius: 0;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 26px rgba(17, 17, 17, 0.04);
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    transform 0.3s ease,
    width 0.3s ease,
    border-radius 0.3s ease,
    margin-top 0.3s ease;
}

.navbar:hover,
.navbar:focus-within {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 32px rgba(17, 17, 17, 0.08);
}

.navbar.scrolled {
  width: min(1200px, calc(100% - 1.1rem));
  margin-top: 0.3rem;
  border-left: 1px solid rgba(255, 255, 255, 0.46);
  border-right: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.66);
  border-color: rgba(255, 255, 255, 0.46);
  box-shadow: 0 18px 38px rgba(17, 17, 17, 0.12);
}

.navbar.scrolled:hover,
.navbar.scrolled:focus-within {
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 22px 44px rgba(17, 17, 17, 0.14);
  transform: translateY(-1px);
}

.navbar-container {
  width: min(1180px, calc(100% - 2rem));
  min-height: 96px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: min-height 0.28s ease, gap 0.28s ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
  transition: gap 0.28s ease;
}

.logo {
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
  transition: width 0.28s ease, height 0.28s ease, transform 0.28s ease;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.site-title {
  font-size: 1.04rem;
  font-weight: 800;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: font-size 0.28s ease, letter-spacing 0.28s ease;
}

.nav-links {
  display: none;
}

.nav-links ul {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: gap 0.28s ease;
}

.give-link,
.connect-link,
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  transition: min-height 0.28s ease, transform 0.28s ease, padding 0.28s ease, width 0.28s ease;
}

.give-link {
  gap: 0.45rem;
  padding: 0 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-primary-dark);
  background: var(--color-surface);
  font-size: 0.9rem;
  font-weight: 700;
}

.give-link:hover,
.give-link:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.connect-link {
  padding: 0 1.05rem;
  border-radius: 999px;
  background: var(--color-primary-dark);
  color: #ffffff;
  font-size: 0.92rem;
  font-weight: 700;
  box-shadow: 0 14px 28px rgba(17, 17, 17, 0.14);
}

.connect-link:hover,
.connect-link:focus-visible {
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #ec4899 100%);
  color: #ffffff;
  transform: translateY(-2px) scale(1.08);
  box-shadow: 0 22px 36px rgba(124, 58, 237, 0.24);
}

.menu-toggle {
  width: 46px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #ffffff;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--color-text);
  transform-origin: center;
  transition: transform 0.28s ease, opacity 0.22s ease, background-color 0.22s ease;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.72);
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-menu {
  width: min(1220px, calc(100% - 1rem));
  margin: 0 auto 0.4rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.44);
  border-top: none;
  border-radius: 0 0 24px 24px;
  backdrop-filter: blur(16px);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition:
    max-height 0.34s ease,
    opacity 0.24s ease,
    transform 0.28s ease;
}

.mobile-menu.is-open {
  max-height: 80vh;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  box-shadow: 0 18px 38px rgba(17, 17, 17, 0.12);
}

.mobile-menu-inner {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0.75rem 0 1.5rem;
  display: grid;
  gap: 0.35rem;
}

.mobile-menu-inner a {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--color-border);
  font-weight: 700;
  color: var(--color-text);
}

.mobile-menu-inner a:hover,
.mobile-menu-inner a:focus-visible {
  color: #2563eb;
}

.mobile-socials {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  color: var(--color-primary-dark);
}

.navbar.scrolled .navbar-container {
  min-height: 68px;
  gap: 0.85rem;
}

.navbar.scrolled .brand {
  gap: 0.7rem;
}

.navbar.scrolled .logo {
  width: 42px;
  height: 42px;
  transform: scale(0.96);
}

.navbar.scrolled .site-title {
  font-size: 0.92rem;
  letter-spacing: 0.035em;
}

.navbar.scrolled .header-actions {
  gap: 0.6rem;
}

.navbar.scrolled .give-link,
.navbar.scrolled .connect-link,
.navbar.scrolled .menu-toggle {
  min-height: 40px;
}

.navbar.scrolled .give-link,
.navbar.scrolled .menu-toggle {
  min-width: 40px;
}

.navbar.scrolled .connect-link {
  padding: 0 0.9rem;
}

@media (max-width: 991px) {
  .brand-copy {
    display: none;
  }

  .navbar.scrolled {
    width: min(100%, calc(100% - 0.6rem));
  }
}

@media (min-width: 992px) {
  .nav-links {
    display: block;
  }

  .menu-toggle,
  .mobile-menu {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .connect-link {
    display: none;
  }

  .give-link {
    width: 46px;
    padding: 0;
  }

  .give-link span {
    display: none;
  }

  .navbar-container {
    min-height: 86px;
  }

  .navbar.scrolled .navbar-container {
    min-height: 64px;
  }
}