:root {
  --nav-height: 68px;
  --nav-offset: 16px;
  --nav-header-bg: rgba(255, 255, 255, 0.68);
  --nav-border-light: rgba(0, 0, 0, 0.06);
  --nav-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
  --nav-shadow-sm: 0 8px 16px rgba(0, 0, 0, 0.04);
  --nav-white: #ffffff;
  --nav-black: #111111;
  --nav-text: #555555;
}

@media (min-width: 1024px) {
  :root { --nav-height: 62px; }
}

.site-header.header {
  position: fixed;
  top: var(--nav-offset);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 1200px;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  background: var(--header-bg, var(--nav-header-bg));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-light, var(--nav-border-light));
  border-radius: 22px;
  box-shadow: var(--shadow, var(--nav-shadow));
}

@media (min-width: 768px) {
  .site-header.header {
    width: calc(100% - 64px);
    padding: 0 22px;
  }
}

@media (min-width: 1024px) {
  .site-header.header {
    width: calc(100% - 144px);
    padding: 0 26px;
  }
}

.site-header .logo {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--black, var(--nav-black));
}

.site-header .nav-desktop {
  display: none;
  align-items: center;
  gap: 40px;
}

@media (min-width: 768px) {
  .site-header .nav-desktop { display: flex; gap: 32px; }
}

@media (min-width: 1024px) {
  .site-header .nav-desktop { gap: 40px; }
}

.site-header .nav-link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.2;
  color: var(--text, var(--nav-text));
  transition: color 0.2s;
}

.site-header .nav-link:hover { color: var(--black, var(--nav-black)); }

.site-header .nav-link.active {
  color: var(--black, var(--nav-black));
  font-weight: 700;
  border-bottom: none;
  padding-bottom: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-dropdown {
  position: relative;
}

.site-header .contact-dropdown {
  display: none;
}

@media (min-width: 768px) {
  .site-header .contact-dropdown {
    display: block;
  }
}

.btn-contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--black, var(--nav-black));
  color: var(--white, var(--nav-white));
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 10px 24px;
  border-radius: 9999px;
  box-shadow: var(--nav-shadow-sm);
  transition: opacity 0.2s, transform 0.2s;
}

.btn-contact:hover { opacity: 0.88; }

@media (min-width: 768px) {
  .btn-contact { padding: 10px 20px; }
}

@media (min-width: 1024px) {
  .btn-contact { padding: 10px 24px; }
}

.btn-contact-mobile {
  width: 100%;
}

.contact-panel {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 260px;
  padding: 14px;
  background: var(--white, var(--nav-white));
  border: 1px solid var(--border-light, var(--nav-border-light));
  border-radius: 16px;
  box-shadow: var(--shadow, var(--nav-shadow));
  z-index: 120;
}

.contact-panel::before {
  content: '';
  position: absolute;
  top: -14px;
  left: 0;
  right: 0;
  height: 14px;
}

.contact-dropdown.open .contact-panel {
  display: block;
}

@media (min-width: 768px) {
  .contact-dropdown.open .contact-panel {
    display: block;
  }
}

.contact-panel-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text, var(--nav-text));
  margin-bottom: 10px;
  padding: 0 4px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border-radius: 10px;
  transition: background 0.15s;
}

.contact-item:hover {
  background: rgba(0, 0, 0, 0.04);
}

:root[data-scheme='dark'] .contact-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.contact-item-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text, var(--nav-text));
}

.contact-item-value {
  font-size: 14px;
  font-weight: 500;
  color: var(--black, var(--nav-black));
}

.site-mobile-nav .contact-dropdown {
  width: 100%;
  margin-top: 4px;
}

.site-mobile-nav .contact-panel {
  position: static;
  display: none;
  width: 100%;
  margin-top: 10px;
  box-shadow: none;
}

.site-mobile-nav .contact-dropdown.open .contact-panel {
  display: block;
}

.site-header .btn-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.site-header .btn-menu img { width: 24px; height: 16px; }

@media (min-width: 768px) {
  .site-header .btn-menu { display: none; }
}

.site-mobile-nav.mobile-nav {
  display: none;
  position: fixed;
  top: calc(var(--nav-offset) + var(--nav-height) + 12px);
  left: 20px;
  right: 20px;
  background: var(--white, var(--nav-white));
  border: 1px solid var(--border-light, var(--nav-border-light));
  border-radius: 24px;
  padding: 24px 20px;
  z-index: 99;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow, var(--nav-shadow));
}

@media (min-width: 768px) {
  .site-mobile-nav.mobile-nav {
    left: 32px;
    right: 32px;
  }
}

.site-mobile-nav.mobile-nav.open { display: flex; }

.site-mobile-nav .nav-link {
  font-size: 16px;
  padding: 8px 0;
}