/* ========================================================================
   Menu Base
   Shared shell, header, typography, navigation and default controls.
   ======================================================================== */

/* ===== Custom Element Layout ===== */
site-menu {
  container-type: inline-size;
  container-name: sitemenu;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1 1 auto;
  min-width: 0;
}

.menu-icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ===== Skip Links (WCAG 2.1 AA) ===== */
.skip-links {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-tooltip);
  width: 100%;
  background: transparent;
  pointer-events: none;
}

.skip-links .skip-link {
  position: absolute;
  top: calc(var(--menu-header-padding-inline) + var(--safe-top));
  left: 50%;
  transform: translateX(-50%);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  background: var(--glass-bg);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--size-r-0-875);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: var(--size-2) solid var(--accent-primary);
  box-shadow: var(--shadow-md);
  transition:
    clip-path 0.3s ease,
    box-shadow 0.2s ease;
  pointer-events: auto;
  white-space: nowrap;
  z-index: calc(var(--z-tooltip) + var(--z-base));
  clip-path: inset(0 0 100% 0);
}

.skip-links .skip-link:focus {
  clip-path: inset(0);
  outline: var(--size-3) solid var(--accent-primary);
  outline-offset: var(--space-1);
  box-shadow: var(--shadow-lg);
}

.skip-links .skip-link:hover:focus {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

/* ===== Icon System ===== */
.nav-icon-wrapper,
.icon-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-2);
  vertical-align: middle;
  flex-shrink: 0;
}

.nav-icon {
  width: var(--menu-icon-size, var(--size-16));
  height: var(--menu-icon-size, var(--size-16));
  min-width: var(--menu-icon-size, var(--size-16));
  min-height: var(--menu-icon-size, var(--size-16));
  fill: currentcolor;
  flex-shrink: 0;
  filter: drop-shadow(
    0 var(--size-0-5) var(--size-1) color-mix(in srgb, var(--clr-black) 15%, transparent)
  );
  transition:
    transform 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    opacity 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    filter 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1));
  opacity: 0.85;
  display: inline-block;
  position: relative;
}

.icon-fallback {
  font-size: var(--size-r-0-875);
  flex-shrink: 0;
  opacity: 0.85;
  line-height: 1;
}

.icon-fallback--hidden {
  display: none;
}

.site-menu .lang-text {
  margin-left: var(--space-1);
  font-size: 0.9em;
  font-weight: 600;
}

.nav-icon-wrapper .nav-icon,
.icon-container .nav-icon {
  margin-right: 0;
}

/* ===== Typography ===== */
.site-menu__list li,
.site-menu__list li a {
  font-family: var(--font-primary);
  font-feature-settings:
    "kern" 1,
    "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: var(--size-17);
  line-height: 1.4;
  font-weight: 510;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: var(--route-header-top);
  left: 50%;
  width: calc(100% - var(--menu-header-side-gap) - var(--safe-left) - var(--safe-right));
  max-width: var(--menu-header-max-width);
  min-width: 0;
  height: var(--menu-header-height);
  padding: 0 var(--menu-header-padding-inline);
  background: var(--component-header-bg);
  backdrop-filter: blur(var(--menu-header-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--menu-header-backdrop-blur));
  border-radius: var(--component-pill-radius);
  border: var(--size-1) solid var(--component-separator);
  box-shadow: var(--component-shadow-depth-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: var(--z-overlay);
  animation: headerAppear 0.8s
    var(--component-spring-bounce, cubic-bezier(0.68, -0.55, 0.265, 1.55)) forwards;
  opacity: 0;
  transform: translateX(-50%) translateY(calc(var(--size-20) * -1)) scale(0.95);
  touch-action: pan-y;
  font-family: var(--font-primary);
  font-weight: 500;
  letter-spacing: -0.02em;
}

@container sitemenu (width >= 901px) {
  .site-header {
    min-width: var(--menu-header-min-width-desktop);
  }
}

@keyframes headerAppear {
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
  }
}

/* ===== Brand / Subtitle ===== */
.site-logo__container {
  display: flex;
  align-items: center;
  text-decoration: none;
  cursor: default;
  padding-right: var(--menu-header-padding-inline);
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
}

.site-title,
.site-subtitle {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: var(--size-r-1);
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-subtitle {
  font-weight: 400;
  opacity: 0.8;
  margin-left: var(--space-2);
  display: none;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-subtitle.show {
  display: inline-block;
}

@container sitemenu (max-width: 1024px) {
  .site-subtitle {
    display: none !important;
  }
}

@container sitemenu (max-width: 900px) {
  .site-subtitle {
    display: inline-block !important;
    font-size: var(--size-r-0-875);
    opacity: 0.7;
    margin-left: var(--space-2);
    max-width: var(--size-120);
    vertical-align: middle;
  }
}

@container sitemenu (max-width: 480px) {
  .site-title {
    font-size: var(--size-r-1);
  }

  .site-subtitle {
    font-size: var(--size-r-0-8125);
    max-width: var(--size-100);
  }
}

/* ===== Navigation ===== */
.site-menu {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  transition: transform 0.4s var(--component-spring-smooth, cubic-bezier(0.25, 0.46, 0.45, 0.94));
  overflow: visible;
  margin: 0;
  flex: 1 0 auto;
  position: relative;
  padding: 0;
}

.site-menu__list {
  list-style: none;
  display: flex;
  gap: clamp(var(--size-4), 0.8vw, var(--size-8));
  align-items: center;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
  justify-content: flex-end;
  width: auto;
}

.site-menu__list li {
  display: flex;
  flex-shrink: 0;
  min-width: fit-content;
  --menu-item-index: 0;
}

.site-menu__list li.menu-utility-separator {
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-1);
  pointer-events: none;
}

.menu-utility-separator__line {
  width: var(--size-1);
  height: var(--size-20);
  background: var(--component-separator);
  opacity: 0.3;
}

/* ===== Menu Items ===== */
.site-menu__list li a,
.site-menu__list button.search-trigger,
.site-menu__list button.contact-trigger,
.site-menu__list button.lang-toggle,
.site-menu__list button.theme-toggle {
  text-decoration: none;
  color: var(--component-label-primary);
  font-family: var(--font-primary);
  font-weight: 510;
  position: relative;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding: var(--menu-item-padding-y) var(--menu-item-padding-x);
  min-height: var(--menu-item-min-height);
  min-width: fit-content;
  border-radius: var(--menu-item-radius);
  background: transparent;
  border: var(--size-1) solid transparent;
  font-size: clamp(var(--size-13), 1.1vw, var(--size-14));
  letter-spacing: -0.01em;
  touch-action: manipulation;
  transition:
    background 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    color 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    transform 0.15s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    border-color 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    box-shadow 0.2s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1));
  -webkit-tap-highlight-color: color-mix(in srgb, var(--component-accent-blue) 10%, transparent);
  -webkit-user-select: none;
  user-select: none;
  white-space: nowrap;
  cursor: pointer;
}

.site-menu__list li a:hover,
.site-menu__list li a:focus,
.site-menu__list button:hover,
.site-menu__list button:focus {
  color: var(--text-primary);
  background: var(--component-fill-primary);
  border-color: var(--component-separator);
  transform: translateY(calc(var(--size-1) * -1));
  box-shadow: var(--menu-item-hover-shadow);
  outline: none;
}

.site-menu__list li a:active,
.site-menu__list button:active {
  background: var(--component-fill-secondary);
  color: var(--text-primary);
  transform: translateY(0) scale(0.98);
  box-shadow: none;
}

.site-menu__list li a:focus-visible,
.site-menu__list button:focus-visible {
  outline: var(--size-2) solid var(--component-accent-blue);
  outline-offset: var(--space-1);
  box-shadow: 0 0 0 var(--size-4) color-mix(in srgb, var(--component-accent-blue) 20%, transparent);
}

/* ===== Search Button ===== */
.site-menu__list button.search-trigger,
.site-menu__list button.contact-trigger {
  font-size: clamp(var(--size-14), 1.2vw, var(--size-15));
  padding: var(--menu-item-padding-y);
}

.site-menu__list button.search-trigger .icon-container,
.site-menu__list button.contact-trigger .icon-container {
  margin-right: 0;
}

.site-menu__list button.search-trigger .nav-icon,
.site-menu__list button.contact-trigger .nav-icon {
  width: var(--menu-action-icon-size, var(--size-18));
  height: var(--menu-action-icon-size, var(--size-18));
  min-width: var(--menu-action-icon-size, var(--size-18));
  min-height: var(--menu-action-icon-size, var(--size-18));
  opacity: 0.9;
  filter: drop-shadow(
    0 var(--size-1) var(--size-2) color-mix(in srgb, var(--clr-black) 10%, transparent)
  );
}

/* Keep the search shell inert until the richer search stylesheet is loaded. */
.menu-search {
  min-width: 0;
}

.menu-search[aria-hidden="true"] {
  display: none;
}

.site-header.search-mode .menu-search[aria-hidden="false"] {
  display: flex;
  flex: 1 1 auto;
}

/* ===== Theme Toggle ===== */
.site-menu__list button.theme-toggle {
  position: relative;
  padding: var(--menu-item-padding-y);
  width: var(--menu-item-min-height);
  min-width: var(--menu-item-min-height);
  justify-content: center;
  overflow: hidden;
}

.site-menu .theme-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--menu-action-icon-size, var(--size-18));
  height: var(--menu-action-icon-size, var(--size-18));
  min-width: var(--menu-action-icon-size, var(--size-18));
  min-height: var(--menu-action-icon-size, var(--size-18));
  pointer-events: none;
  transition:
    opacity 0.3s var(--component-spring-quick, cubic-bezier(0.4, 0, 0.2, 1)),
    transform 0.4s var(--component-spring-bounce, cubic-bezier(0.68, -0.55, 0.265, 1.55));
}

.site-menu .theme-icon--sun {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

.site-menu .theme-icon--moon {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(-90deg) scale(0.5);
}

.site-menu .theme-toggle.is-light .theme-icon--sun {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg) scale(0.5);
}

.site-menu .theme-toggle.is-light .theme-icon--moon {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg) scale(1);
}