:root {
  --desktop-nav-bg-color: #ffffff;
  --desktop-nav-entry-color: #000000;
  --desktop-nav-entry-hover-bg-color: #000000;
  --desktop-nav-entry-hover-color: #ffffff;
  --nav-drawer-bg-color: #ffffff;
  --nav-drawer-entry-color: #000000;
  --overlay-color: rgba(0, 0, 0, 0.35);
  --bar-color: #000000;
}

html.dark-mode {
  --desktop-nav-bg-color: #191919;
  --desktop-nav-entry-color: #ffffff;
  --desktop-nav-entry-hover-bg-color: #111111;
  --desktop-nav-entry-hover-color: #ffffff;
  --nav-drawer-bg-color: #191919;
  --nav-drawer-entry-color: #ffffff;
  --bar-color: #ffffff;
}

/* Core header + positioning (critical for layout) */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 12px;
  z-index: 1000;
}

/* Logo sizing (prevents layout shift) */
.logo img {
  width: 64px;
  height: 64px;
  vertical-align: middle;
}

/* Hide logo on tiny viewports (important for layout) */
@media (max-width: 63px) {
  .logo img {
    display: none;
  }
}

/* Basic nav links container so desktop layout renders correctly */
.nav-links {
  display: flex;
  flex-direction: row;
  list-style: none;
  gap: 1rem;
  margin: 0;
  padding: 0;
  align-items: center;
}

/* Hamburger bars & menu button — visible on mobile */
.bar {
  background: var(--bar-color);
  width: 30px;
  height: 3px;
}

.menu-btn {
  background: transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
}

.menu-btn:focus {
  outline: 2px solid #0b66ff;
  outline-offset: 2px;
}

/* Overlay used when drawer opens */
.overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-color);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
  z-index: 1050;
}

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

/* Drawer - minimal + structural rules required immediately */
.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 86vw;
  max-width: 360px;
  background: var(--nav-drawer-bg-color);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.22, 0.9, 0.27, 1);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  padding: 28px;
}

/* ensure drawer shows when open */
.nav-drawer.open {
  transform: translateX(0);
}

.drawer-close {
  margin-left: auto;
  border: 0;
  background: transparent;
  padding: 6px;
  cursor: pointer;
  font-size: 40px;
}

/* Structural list/link styles used before deferred CSS loads */
.nav-drawer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--nav-drawer-entry-color);
}

.nav-drawer ul li a {
  display: block;
  padding: 14px 0;
  text-decoration: none;
  color: var(--nav-drawer-entry-color);
  font-weight: 600;
}

/* Accessibility focus for drawer links */
.nav-drawer ul li a:focus {
  outline: 2px solid #0b66ff;
  outline-offset: 4px;
}

/* Desktop nav (structural rules) */
.desktop-nav {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background-color: var(--desktop-nav-bg-color);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid rgba(80, 80, 80, 0.5);
}

/* Desktop link defaults (structural) */
.desktop-nav ul li a {
  padding: 1rem;
  color: var(--desktop-nav-entry-color);
  text-decoration: none;
  font-family: "Archivo Black", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  font-weight: 400;
}

.desktop-nav ul li a:hover {
  background-color: var(--desktop-nav-entry-hover-bg-color);
  color: var(--desktop-nav-entry-hover-color);
}

/* Reusable groups & spacing (leave display definitions here so layout is correct immediately) */
.pc-buttons {
  display: flex;
  flex-direction: row;
  gap: 20px;
  align-items: center;
}

.mobile-buttons {
  display: flex;
  flex-direction: row;
  gap: 20px;
  align-items: center;
}

.brand-btns {
  display: flex;
  flex-direction: row;
  gap: 20px;
  align-items: center;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-btns .brand-name {
  font-size: 20px;
  font-weight: 600;
}

.brand-btns .brand-desc {
  font-size: 10px;
}

/* Responsive toggles needed immediately to hide/show elements correctly */
@media (max-width: 899px) {
  .nav-links { display: none; }
  .pc-buttons { display: none; }
}

@media (min-width: 900px) {
  .menu-btn { display: none; }
  .mobile-buttons { display: none; }
}