.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-1);
  color: var(--text-dark);
  border: 1px solid var(--color-outline);
  box-shadow: var(--shadow-1);
  transform: translateY(-120%);
  transition: transform 0.2s ease;
  z-index: 2000;
}

.skip-link:focus {
  transform: translateY(0);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dark);
}

.btn:focus-visible,
.control-btn:focus-visible {
  outline: 3px solid rgba(47, 144, 255, 0.3);
  outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(47, 144, 255, 0.3);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--color-on-brand);
  box-shadow: var(--shadow-1);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background-color: var(--color-brand-50);
}

.btn:hover {
  box-shadow: var(--shadow-2);
}

.btn-large {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-outline);
  backdrop-filter: blur(10px);
  padding-top: env(safe-area-inset-top);
}

[data-theme="dark"] .site-header {
  background: rgba(27, 31, 38, 0.92);
  border-bottom-color: var(--color-outline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  height: 60px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

.logo {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text-dark);
}

.main-nav {
  display: none;
  align-items: center;
  gap: var(--space-4);
  justify-content: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-ink-700);
  font-weight: 600;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
}

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

@media (min-width: 768px) {
  .main-nav {
    display: flex;
  }
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: flex-end;
  position: relative;
}

.header-icon-btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-2);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-ink-700);
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.header-icon-btn:hover,
.header-icon-btn:focus-visible {
  background: var(--color-surface-3);
  color: var(--text-dark);
  border-color: var(--color-outline);
}

.control-btn {
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-pill);
  background: var(--color-surface-2);
  padding: 8px 14px;
  font-weight: 600;
  color: var(--color-ink-700);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-icon {
  font-size: 1rem;
  line-height: 1;
}

.control-btn:hover {
  background: var(--color-surface-3);
  color: var(--text-dark);
  border-color: var(--color-ink-300);
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.menu-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.menu-bars,
.menu-bars::before,
.menu-bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-pill);
}

.menu-bars {
  position: relative;
}

.menu-bars::before,
.menu-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-bars::before {
  top: -6px;
}

.menu-bars::after {
  top: 6px;
}

.menu-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.menu-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 220px;
  background: var(--color-surface-1);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-2);
  box-shadow: var(--shadow-2);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 1100;
}

.menu-dropdown a {
  text-decoration: none;
  color: var(--color-ink-700);
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius-1);
}

.menu-dropdown .menu-cta {
  background: var(--color-brand-50);
  color: var(--text-dark);
}

.menu-dropdown a:hover,
.menu-dropdown a:focus-visible {
  color: var(--text-dark);
  background: var(--color-surface-2);
}

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

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 18, 32, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 1200;
}

.modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  transform: translateY(10px);
  z-index: 1210;
}

.modal.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.modal-content {
  max-width: 680px;
  width: 100%;
  background: var(--color-surface-1);
  color: var(--text-dark);
  border-radius: var(--radius-3);
  border: 1px solid var(--color-outline);
  box-shadow: var(--shadow-2);
  padding: var(--space-6);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.modal-close {
  border: 1px solid var(--color-outline);
  background: var(--color-surface-2);
  color: var(--color-ink-700);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  font-size: 1.1rem;
  cursor: pointer;
}

.modal-close:hover,
.modal-close:focus-visible {
  background: var(--color-surface-3);
  color: var(--text-dark);
}

.modal-body {
  display: grid;
  gap: var(--space-3);
  color: var(--color-ink-700);
}