:root {
  color-scheme: dark;
  --page: #23262b;
  --surface: rgba(45, 49, 56, 0.92);
  --text: #eef0f3;
  --muted: #b5bbc3;
  --accent: #b7bec6;
  --line: rgba(222, 227, 232, 0.16);
  --radius: 16px;
  --container: 1160px;
  --ink: var(--text);
  --ink-strong: var(--text);
  --accent-strong: #d1d6dc;
  --surface-soft: var(--page);
  --surface-tint: #343941;
  --on-accent: #202328;
  --quantum-gradient: linear-gradient(135deg, #191c20 0%, #30353c 34%, #747b84 70%, #c5cbd2 100%);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #171a1e;
  --surface: rgba(33, 36, 42, 0.94);
  --text: #f2f3f5;
  --muted: #afb5bd;
  --accent: #c4cad1;
  --line: rgba(214, 219, 225, 0.16);
  --accent-strong: #d6dbe1;
  --surface-tint: #292d33;
  --on-accent: #1d2025;
  --quantum-gradient: linear-gradient(135deg, #171a1e 0%, #2c3037 34%, #6a717b 70%, #b9c0c8 100%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
button { color: inherit; font: inherit; }
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: 10px;
  background: var(--text);
  color: var(--page);
}
.skip-link:focus { transform: translateY(0); }
.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(14px);
}
.site-header__inner { position: relative; display: flex; min-height: 82px; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; flex: 0 0 auto; align-items: center; }
.brand__logo { display: block; width: 88px; height: 58px; object-fit: contain; background: transparent; }
.nav-panel { display: flex; align-items: center; margin-left: auto; }
.nav-menu { display: flex; align-items: center; gap: 30px; margin: 0; padding: 0; list-style: none; }
.nav-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--text); font-size: 14px; font-weight: 550; text-decoration: none !important; transition: color 160ms ease; }
.nav-link:hover, .nav-link:focus-visible { color: var(--accent); }
.header-tools { display: flex; flex: 0 0 auto; align-items: center; gap: 10px; }
.theme-toggle, .menu-toggle {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}
.theme-toggle { color: var(--accent); font-size: 21px; }
.menu-toggle { display: none; align-content: center; gap: 5px; }
.menu-toggle span { display: block; width: 18px; height: 1px; background: currentColor; }
.site-main { flex: 1; width: 100%; padding-block: 0; }
.entry-content { width: 100%; max-width: none; margin-inline: auto; }
.entry-content h1, .entry-content h2 { line-height: 1.2; }
.entry-content a { color: var(--accent); }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.site-footer__inner { display: flex; min-height: 78px; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 13px; }
.site-footer__inner p { margin: 0; }
.site-footer__inner a { color: var(--accent); text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 760px) {
  .container { width: min(var(--container), calc(100% - 32px)); }
  .site-header__inner { min-height: 72px; gap: 12px; }
  .brand__logo { width: 78px; height: 52px; }
  .menu-toggle { display: inline-grid; }
  .nav-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    display: none;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--page);
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.14);
  }
  .nav-panel.is-open { display: block; }
  .nav-menu { align-items: stretch; flex-direction: column; gap: 0; }
  .nav-menu li + li { border-top: 1px solid var(--line); }
  .nav-link { display: block; padding: 13px 8px; }
  .site-main { padding-block: 0; }
  .site-footer__inner { min-height: 72px; flex-wrap: wrap; padding-block: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}