.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: #ffffff;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-med) var(--ease-editorial), box-shadow var(--dur-med) var(--ease-editorial), border-color var(--dur-med) var(--ease-editorial);
}

.site-header.is-condensed {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(0.75rem) saturate(1.4);
  -webkit-backdrop-filter: blur(0.75rem) saturate(1.4);
  border-color: var(--ink-08);
  box-shadow: 0 0.5rem 1.5rem var(--ink-08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 5.5rem;
  transition: height var(--dur-med) var(--ease-editorial);
}

.site-header.is-condensed .site-header__inner {
  height: 4.25rem;
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.site-header__mark {
  width: 3.1rem;
  height: 3.1rem;
  object-fit: contain;
  display: block;
  transition: width var(--dur-med) var(--ease-editorial), height var(--dur-med) var(--ease-editorial);
}

.site-header.is-condensed .site-header__mark {
  width: 2.35rem;
  height: 2.35rem;
}

.site-header__nav {
  flex: 0 1 auto;
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(1.25rem, 2.6vw, 2.5rem);
  overflow: hidden;
  transition: opacity var(--dur-med) var(--ease-editorial), transform var(--dur-med) var(--ease-editorial), visibility var(--dur-med);
}

.site-header__nav a {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.175rem;
  letter-spacing: normal;
  color: #28282a;
  white-space: nowrap;
  padding-bottom: 0.3rem;
  background-image: linear-gradient(#28282a, #28282a);
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size var(--dur-fast) var(--ease-editorial), color var(--dur-fast) var(--ease-editorial);
}

.site-header__nav a:hover {
  background-size: 100% 1px;
}

.site-header__nav a.is-active {
  background-size: 100% 1px;
  background-image: linear-gradient(var(--plum), var(--plum));
  color: var(--plum);
}

.site-header.is-condensed .site-header__nav {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.4rem);
  pointer-events: none;
  flex-basis: 0;
}

@media (max-width: 62rem) {
  .site-header__nav {
    display: none;
  }

  .icon-btn--menu,
  .site-header.is-condensed .icon-btn--menu {
    opacity: 1;
    transform: none;
    pointer-events: auto;
    transition-delay: 0s;
  }
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 0 0 auto;
}

/* --- Minimal ghost icon buttons (lang switch + menu) --- */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 2.75rem;
  padding-inline: 0.65rem;
  border: 0;
  border-radius: 0.75rem;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  transition: background var(--dur-fast) var(--ease-editorial), color var(--dur-fast) var(--ease-editorial);
}

.icon-btn:hover {
  background: var(--ink-08);
  color: var(--plum);
}

.icon-btn--menu {
  width: 2.75rem;
  padding-inline: 0;
  flex-direction: column;
  gap: 0.28rem;
  opacity: 0;
  transform: scale(0.5) rotate(-90deg);
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-editorial), transform var(--dur-med) var(--ease-editorial), background var(--dur-fast) var(--ease-editorial), color var(--dur-fast) var(--ease-editorial);
}

.site-header.is-condensed .icon-btn--menu {
  opacity: 1;
  transform: scale(1) rotate(0deg);
  pointer-events: auto;
  transition-delay: 0.1s;
}

.icon-btn--menu span {
  display: block;
  width: 1.15rem;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease-editorial), opacity var(--dur-fast) var(--ease-editorial);
}

.icon-btn--menu[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.icon-btn--menu[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.icon-btn--menu[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* --- Drawer (therumpus.net style: fixed right panel, not full width, works at any scroll position) --- */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 900;
  visibility: hidden;
  pointer-events: none;
}

.drawer[data-state="open"] {
  visibility: visible;
  pointer-events: auto;
}

.drawer__backdrop {
  position: absolute;
  inset: 0;
  background: var(--ink);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-editorial);
}

.drawer[data-state="open"] .drawer__backdrop {
  opacity: 0.35;
}

.drawer__panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(34vw, 26rem);
  min-width: 20rem;
  background: var(--bg);
  border-left: 1px solid var(--ink-14);
  padding: 6.5rem var(--space-7) var(--space-7);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--dur-med) var(--ease-editorial);
  box-shadow: -2rem 0 4rem var(--ink-14);
}

.drawer[data-state="open"] .drawer__panel {
  transform: translateX(0);
}

.drawer__close {
  position: absolute;
  top: 2rem;
  right: var(--space-7);
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--ink-14);
  border-radius: 50%;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.drawer__item {
  border-bottom: 1px solid var(--ink-08);
  opacity: 0;
  transform: translateX(1rem);
}

.drawer[data-state="open"] .drawer__item {
  opacity: 1;
  transform: none;
  transition: opacity var(--dur-med) var(--ease-editorial), transform var(--dur-med) var(--ease-editorial);
  transition-delay: calc(var(--i) * 0.05s + 0.1s);
}

.drawer__item a {
  display: block;
  padding: 1.1rem 0;
  font-family: var(--font-display);
  font-size: var(--step-h4);
  transition: color var(--dur-fast) var(--ease-editorial), padding-left var(--dur-fast) var(--ease-editorial);
}

.drawer__item a:hover,
.drawer__item a.is-active {
  color: var(--plum);
  padding-left: 0.5rem;
}

.drawer__item--letter a {
  font-family: var(--font-hand-1);
  font-size: 2.25rem;
  color: var(--plum);
}

.drawer__foot {
  margin-top: auto;
  font-size: var(--step-small);
  color: var(--ink-50);
  font-style: italic;
  padding-top: var(--space-5);
}

@media (max-width: 40rem) {
  .drawer__panel {
    width: 100%;
    min-width: 0;
    padding: 6rem 1.5rem 2rem;
  }
  .icon-btn--lang span {
    display: none;
  }
}