.site-header {
  position: relative;
  z-index: 40;
  padding-top: 1rem;
}

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: nowrap;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  box-shadow: 0 10px 40px -10px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

[data-theme="dark"] .site-nav {
  background: rgba(30, 41, 59, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 1 1 auto;
  min-width: 0;
}

.site-nav-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: auto;
}

.site-nav .site-brand,
.mobile-nav-toggle {
  display: none;
}

.site-nav a,
.dropdown-toggle,
.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.45rem 0.8rem;
  background: transparent;
  line-height: 1;
}

.site-nav a:hover,
.dropdown-toggle:hover,
.lang-btn:hover,
.site-nav a:focus-visible,
.dropdown-toggle:focus-visible,
.lang-btn:focus-visible {
  background: var(--accent-soft);
}

[data-theme="dark"] .site-nav a:hover,
[data-theme="dark"] .dropdown-toggle:hover,
[data-theme="dark"] .lang-btn:hover,
[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .site-nav a:focus-visible,
[data-theme="dark"] .dropdown-toggle:focus-visible,
[data-theme="dark"] .lang-btn:focus-visible,
[data-theme="dark"] .theme-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.dropdown {
  position: relative;
}

.dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.4rem;
}

.dropdown-toggle {
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 260px;
  visibility: hidden;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 250ms ease, transform 250ms ease, visibility 250ms ease;
  padding: 0.35rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  box-shadow: var(--shadow);
  z-index: 20;
}

.dropdown.open .dropdown-menu {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  border-radius: 8px;
  width: 100%;
  min-height: 44px;
  padding: 0.7rem 0.8rem;
  line-height: 1.35;
}


.lang-switch {
  margin-left: auto;
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.18rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.lang-btn[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

[data-theme="dark"] .lang-btn[aria-pressed="true"]:hover,
[data-theme="dark"] .lang-btn[aria-pressed="true"]:focus-visible {
  background: var(--text);
  color: var(--bg);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text);
  background: transparent;
  padding: 0.45rem;
  line-height: 1;
  cursor: pointer;
  margin-left: 0.2rem;
}

.theme-toggle:hover {
  background: var(--accent-soft);
}

.theme-toggle svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.72rem 1.05rem;
  min-height: 44px;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: var(--bg);
  box-shadow: 0 10px 24px -6px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: var(--bg-soft);
  color: var(--text);
  border-color: var(--line);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn-disabled,
.btn:disabled {
  background: rgba(148, 163, 184, 0.24);
  border-color: rgba(148, 163, 184, 0.45);
  color: #64748b;
  box-shadow: none;
  cursor: not-allowed;
  pointer-events: none;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 42px;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.chip:hover,
.chip:focus-visible {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
}

.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(1.2rem, 2.5vw, 1.6rem);
  box-shadow: var(--shadow);
  transition: transform 250ms ease, box-shadow 250ms ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.12);
}

[data-theme="dark"] .card:hover {
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

.card-muted {
  background: var(--bg-elevated);
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--text);
  padding: 0.24rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
}

.site-footer .container {
  padding: 1.5rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .site-header {
    padding-top: 0.75rem;
  }

  .site-nav {
    border-radius: 16px;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
    padding: 0.35rem;
    z-index: 30;
  }

  .site-nav .site-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
    padding: 0.35rem 0.5rem;
    margin-right: auto;
    font-family: "Space Grotesk", "Segoe UI", sans-serif;
    font-size: 1.05rem;
    line-height: 1;
    letter-spacing: -0.03em;
  }

  .site-brand span {
    color: var(--text-muted);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
  }

  .site-nav-controls {
    margin-left: 0;
    gap: 0.15rem;
  }

  .js .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    padding: 0;
    color: var(--text);
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    border-radius: 11px;
    cursor: pointer;
  }

  .mobile-nav-toggle svg {
    width: 20px;
    height: 20px;
  }

  .is-menu-open .menu-icon,
  .close-icon {
    display: none;
  }

  .is-menu-open .close-icon {
    display: block;
  }

  .site-nav-links {
    order: 4;
    width: 100%;
    flex: 0 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.45rem 0.15rem 0.15rem;
    border-top: 1px solid var(--line);
    display: flex;
  }

  .js .site-nav-links {
    display: none;
  }

  .js .is-menu-open .site-nav-links {
    display: flex;
  }

  .site-nav-links > a,
  .dropdown-toggle,
  .dropdown-menu a {
    width: 100%;
    justify-content: flex-start;
    min-height: 44px;
    line-height: 1.3;
    border-radius: 10px;
  }

  .dropdown {
    width: 100%;
  }

  .dropdown::after {
    display: none;
  }

  .lang-switch {
    margin-left: 0;
    padding: 0.1rem;
    gap: 0;
    justify-content: center;
  }

  .lang-switch .lang-btn {
    min-width: 35px;
    min-height: 40px;
    padding: 0.3rem 0.45rem;
    font-size: 0.8rem;
    justify-content: center;
  }

  .theme-toggle {
    width: 40px;
    height: 44px;
    margin-left: 0;
  }

  .dropdown-menu {
    display: none;
    position: static;
    margin-top: 0.45rem;
    width: 100%;
    min-width: 0;
  }

  .dropdown.open .dropdown-menu {
    display: block;
  }

  .btn-row {
    width: 100%;
    gap: 0.6rem;
  }

  .btn-row .btn {
    flex: 1 1 8rem;
    padding: 0.7rem 0.75rem;
    font-size: 0.88rem;
    text-align: center;
    line-height: 1.3;
  }

  .card {
    padding: 1rem;
  }

  .site-footer {
    margin-top: 1.5rem;
  }

  .site-footer p {
    overflow-wrap: anywhere;
  }

  .chip-row {
    gap: 0.5rem;
  }
}