:root {
  color-scheme: dark;
  --site-ink: #f8fafc;
  --site-muted: #94a3b8;
  --site-surface: rgba(20, 29, 47, 0.76);
  --site-surface-strong: rgba(10, 15, 29, 0.96);
  --site-soft: rgba(255, 255, 255, 0.06);
  --site-border: rgba(255, 255, 255, 0.09);
  --site-shadow: 0 26px 60px rgba(0, 0, 0, 0.38);
  --site-accent: #f97316;
}

html[data-color-theme="light"] {
  color-scheme: light;
  --site-ink: #111827;
  --site-muted: #5b6472;
  --site-surface: rgba(255, 255, 255, 0.82);
  --site-surface-strong: rgba(248, 250, 252, 0.97);
  --site-soft: rgba(17, 24, 39, 0.06);
  --site-border: rgba(17, 24, 39, 0.12);
  --site-shadow: 0 24px 55px rgba(30, 41, 59, 0.15);
  --site-accent: #ea580c;
}

body {
  transition: background-color 180ms ease, color 180ms ease;
}

body.drawer-open {
  overflow: hidden;
}

.topbar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.8rem 1.1rem;
  border: 1px solid var(--site-border);
  border-radius: 1.25rem;
  background: var(--site-surface);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.14);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.brand {
  color: var(--site-ink);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.header-clock {
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--site-border);
  border-radius: 0.7rem;
  background: var(--site-soft);
  color: var(--site-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}

.theme-toggle {
  min-height: 2.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.72rem;
  border: 1px solid var(--site-border);
  border-radius: 999px;
  background: var(--site-soft);
  color: var(--site-ink);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 800;
  cursor: pointer;
}

.menu-toggle {
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.5rem;
  border: 1px solid var(--site-border);
  border-radius: 0.7rem;
  background: var(--site-soft);
  cursor: pointer;
  z-index: 1010;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--site-ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.menu-drawer {
  position: fixed;
  top: 0;
  right: -340px;
  z-index: 1000;
  width: min(340px, 88vw);
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 5.5rem 2rem 2rem;
  border-left: 1px solid var(--site-border);
  background: var(--site-surface-strong);
  box-shadow: -16px 0 50px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  transition: right 280ms cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-drawer.is-open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(2, 6, 23, 0.55);
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(4px);
  transition: opacity 180ms ease;
}

.drawer-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.drawer-link,
.drawer-submenu-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.72rem 0;
  border: 0;
  border-bottom: 1px solid var(--site-border);
  background: transparent;
  color: var(--site-ink);
  font: inherit;
  font-size: 1.05rem;
  font-weight: 800;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.drawer-link:hover,
.drawer-submenu-trigger:hover,
.drawer-sublink:hover {
  color: var(--site-accent);
}

.drawer-submenu-trigger::after {
  content: "+";
  color: var(--site-muted);
}

.drawer-submenu-trigger.is-active::after {
  content: "-";
  color: var(--site-accent);
}

.drawer-submenu {
  display: none;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.25rem 0 0.35rem 1rem;
}

.drawer-submenu.is-active {
  display: flex;
}

.drawer-sublink {
  padding: 0.25rem 0;
  color: var(--site-muted);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 560px) {
  .topbar {
    padding: 0.7rem 0.8rem;
  }

  .header-clock {
    display: none;
  }
}