/* src/css/header.css */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  margin-bottom: 0;
  background-color: var(--color-header-bg);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.5s ease;
  will-change: transform;
  view-transition-name: site-header;
}
.site-header.is-hidden {
  transform: translateY(-110%);
  opacity: 0;
}
.site-header-border {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  view-transition-name: site-header-border;
}
.site-branding {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  view-transition-name: site-branding;
  width: fit-content;
}
.site-title {
  font-size: 26px;
  font-weight: 400;
  margin: 0;
  letter-spacing: 0.03em;
  text-transform: lowercase;
  font-variant-numeric: oldstyle-nums;
}
.site-title-uppercase {
  text-transform: uppercase;
}
.site-title a {
  color: var(--color-text-strong);
  border-bottom: none;
  transition: color 0.3s ease, letter-spacing 0.3s ease;
  display: inline-block;
  position: relative;
}
.site-title a:hover {
  color: var(--color-text);
  letter-spacing: 0.05em;
}
.site-title a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text);
  transition: width 0.3s ease;
}
.site-title a:hover::after {
  width: 100%;
}
.site-nav a {
  margin-left: 20px;
  color: var(--color-text-subtle);
  font-size: 16px;
  border-bottom: none;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-text-strong);
  outline: none;
}
.site-nav {
  view-transition-name: site-nav;
  width: fit-content;
}
.site-controls {
  display: flex;
  align-items: center;
  gap: 20px;
}
.eye-mode-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-subtle);
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  margin-left: 0;
}
.eye-mode-toggle:hover {
  color: var(--color-text-strong);
  background-color: var(--color-code-bg);
}
.eye-mode-toggle:focus-visible {
  outline: 2px solid var(--color-text-subtle);
  outline-offset: 2px;
}
.eye-mode-icon--dim {
  display: block;
}
.eye-mode-icon--light {
  display: none;
}
.eye-mode-toggle[aria-pressed=true] .eye-mode-icon--dim {
  display: none;
}
.eye-mode-toggle[aria-pressed=true] .eye-mode-icon--light {
  display: block;
}
.site-header-spacer {
  height: 100px;
}
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  color: var(--color-text);
  margin-left: 10px;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}
.hamburger-box {
  width: 24px;
  height: 24px;
  display: inline-block;
  position: relative;
  vertical-align: middle;
}
.hamburger-inner {
  display: block;
  top: 50%;
  margin-top: -1px;
}
.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
  width: 24px;
  height: 2px;
  background-color: currentColor;
  border-radius: 4px;
  position: absolute;
}
.hamburger-inner::before,
.hamburger-inner::after {
  content: "";
  display: block;
}
.hamburger-inner::before {
  top: -8px;
}
.hamburger-inner::after {
  bottom: -8px;
}
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 2099;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.mobile-nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}
.mobile-nav-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  height: 100dvh;
  width: 280px;
  max-width: 80vw;
  background-color: var(--color-background);
  z-index: 2100;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  visibility: hidden;
}
.mobile-nav-sidebar.is-open {
  transform: translateX(0);
  visibility: visible;
}
.mobile-nav-close {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  margin: 0 0 30px auto;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  transition: background-color 0.2s;
}
.mobile-nav-close:hover {
  background-color: var(--color-border);
}
.mobile-nav-sidebar a {
  display: block;
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: none;
  border-radius: 8px;
  margin-bottom: 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.mobile-nav-sidebar a:hover,
.mobile-nav-sidebar a[aria-current=page] {
  background-color: var(--color-code-bg);
  color: var(--color-text-strong);
}
body.no-scroll {
  overflow: hidden;
}
@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  .site-nav {
    display: none;
  }
  .site-header {
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    margin-bottom: 30px;
    box-shadow: inset 0 -1px var(--color-border);
  }
  .site-title {
    margin-bottom: 0;
  }
  .site-header-border {
    display: none;
  }
  .site-header,
  .site-header-border,
  .site-branding,
  .site-nav {
    view-transition-name: none !important;
  }
  body.no-scroll {
    padding-right: var(--scrollbar-compensation, 0px);
  }
}
@media (max-width: 600px) {
  .site-header {
    flex-direction: row;
    align-items: center;
    margin-bottom: 30px;
    padding: 16px 20px;
  }
  .site-title {
    margin-bottom: 0;
  }
  .site-nav {
    margin-left: -5px;
  }
  .site-nav a {
    margin: 0 10px 0 0;
  }
  .site-header-spacer {
    height: 80px;
  }
}