/* Material Design 3 - Navigation Components
   App Bar, Navigation Drawer, Navigation Rail */

/* App Bar (Top Navigation) */
.m3-app-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  z-index: 100;
  transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
}

.m3-app-bar.scrolled {
  background-color: var(--md-sys-color-surface-container);
  box-shadow: var(--md-sys-elevation-level2);
}

.m3-app-bar-container {
  height: 100%;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .m3-app-bar-container {
    padding: 0 24px;
  }
}

@media (min-width: 1240px) {
  .m3-app-bar-container {
    padding: 0 32px;
  }
}

/* App Bar Title */
.m3-app-bar-title {
  font-size: var(--md-sys-typescale-title-large-font-size);
  font-weight: var(--md-sys-typescale-title-large-font-weight);
  line-height: var(--md-sys-typescale-title-large-line-height);
  letter-spacing: var(--md-sys-typescale-title-large-letter-spacing);
  margin: 0;
  flex-shrink: 0;
}

.m3-app-bar-title a {
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  height: 100%;
}

.m3-app-bar-title img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

/* Navigation */
.m3-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

/* Navigation Items */
.m3-nav-items {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 8px;
}

@media (min-width: 840px) {
  .m3-nav-items {
    display: flex;
  }
}

.m3-nav-item {
  position: relative;
}

.m3-nav-link {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
  font-size: var(--md-sys-typescale-label-large-font-size);
  font-weight: var(--md-sys-typescale-label-large-font-weight);
  letter-spacing: var(--md-sys-typescale-label-large-letter-spacing);
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  position: relative;
  overflow: hidden;
}

.m3-nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-nav-link:hover::before {
  opacity: var(--md-sys-state-hover-opacity);
}

.m3-nav-link:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-nav-link.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* App Bar Actions */
.m3-app-bar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Icon Button */
.m3-icon-button {
  width: 48px;
  height: 48px;
  border-radius: var(--md-sys-shape-corner-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-icon-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-icon-button:hover::before {
  opacity: var(--md-sys-state-hover-opacity);
}

.m3-icon-button:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-icon-button:active::before {
  opacity: var(--md-sys-state-pressed-opacity);
}

/* Navigation Drawer */
.m3-navigation-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 360px;
  max-width: calc(100vw - 56px);
  height: 100vh;
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
  transform: translateX(-100%);
  transition: transform var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized);
  z-index: 200;
  overflow-y: auto;
  box-shadow: var(--md-sys-elevation-level1);
}

.m3-navigation-drawer.open {
  transform: translateX(0);
  box-shadow: var(--md-sys-elevation-level3);
}

.m3-navigation-drawer-header {
  padding: 56px 28px 16px;
  background-color: var(--md-sys-color-surface-container);
}

.m3-navigation-drawer-headline {
  font-size: var(--md-sys-typescale-headline-small-font-size);
  font-weight: var(--md-sys-typescale-headline-small-font-weight);
  line-height: var(--md-sys-typescale-headline-small-line-height);
  margin: 0;
}

.m3-navigation-drawer-content {
  padding: 8px 12px 24px;
}

.m3-drawer-nav-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.m3-drawer-nav-item {
  margin-bottom: 4px;
}

.m3-drawer-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
  font-size: var(--md-sys-typescale-label-large-font-size);
  font-weight: var(--md-sys-typescale-label-large-font-weight);
  letter-spacing: var(--md-sys-typescale-label-large-letter-spacing);
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  position: relative;
  overflow: hidden;
}

.m3-drawer-nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.m3-drawer-nav-link:hover::before {
  opacity: var(--md-sys-state-hover-opacity);
}

.m3-drawer-nav-link:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-drawer-nav-link.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.m3-drawer-nav-icon {
  font-size: 24px;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.m3-drawer-nav-label {
  flex: 1;
}

/* Scrim */
.m3-scrim {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--md-sys-color-scrim);
  opacity: 0;
  visibility: hidden;
  transition: all var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
  z-index: 199;
}

.m3-scrim.visible {
  opacity: 0.32;
  visibility: visible;
}

/* Navigation Rail (Tablet) */
@media (min-width: 600px) and (max-width: 839px) {
  .m3-navigation-rail {
    position: fixed;
    left: 0;
    top: 64px;
    width: 80px;
    height: calc(100vh - 64px);
    background-color: var(--md-sys-color-surface);
    border-right: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 0;
    z-index: 90;
  }
  
  .m3-rail-items {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  
  .m3-rail-item {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  
  .m3-rail-link {
    width: 56px;
    height: 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border-radius: var(--md-sys-shape-corner-large);
    color: var(--md-sys-color-on-surface);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  }
  
  .m3-rail-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: currentColor;
    opacity: 0;
    transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  }
  
  .m3-rail-link:hover::before {
    opacity: var(--md-sys-state-hover-opacity);
  }
  
  .m3-rail-link.active {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
  }
  
  .m3-rail-icon {
    font-size: 24px;
  }
  
  .m3-rail-label {
    font-size: var(--md-sys-typescale-label-small-font-size);
    font-weight: var(--md-sys-typescale-label-small-font-weight);
    letter-spacing: var(--md-sys-typescale-label-small-letter-spacing);
  }
}

/* Menu Button (Mobile only) */
.m3-menu-button {
  display: flex;
}

@media (min-width: 840px) {
  .m3-menu-button {
    display: none;
  }
}

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  left: -9999px;
  top: 16px;
  z-index: 999;
  padding: 16px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  text-decoration: none;
  border-radius: var(--md-sys-shape-corner-small);
}

.skip-to-main:focus {
  left: 16px;
}