/* base.css — editorial: сброс, книжная типографика, masthead, доступность, печать */

*, *::before, *::after { box-sizing: border-box; }
html { font-size: var(--fs-root); scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
body { overflow-x: clip; }   /* только вертикальный скролл; clip не создаёт scroll-контейнер (sticky-шапка работает) */
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1rem; line-height: var(--lh);
  color: var(--ink); background: var(--paper);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  font-feature-settings: "liga" 1, "kern" 1;
}
::selection { background: color-mix(in srgb, var(--accent) 22%, transparent); }

/* Заголовки — высококонтрастный дисплей */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: var(--lh-tight); color: var(--ink); margin: 0 0 .4em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 1.6rem + 3.4vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.5rem); }
h3 { font-size: 1.34rem; }
h4 { font-size: 1.08rem; }
p { margin: 0 0 1.15em; }
strong { font-weight: 700; }
em, i { font-style: italic; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: .5px; text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent); transition: text-decoration-color .15s var(--ease), color .15s; }
a:hover { color: var(--accent-deep); text-decoration-color: currentColor; }

img { max-width: 100%; height: auto; display: block; }
figure { margin: 0; }
ul, ol { margin: 0 0 1.15em; padding-left: 1.3em; }
li { margin-bottom: .35em; }
hr { border: 0; border-top: 1px solid var(--rule); margin: var(--gap-md) 0; }
address { font-style: normal; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
small { font-size: .82rem; color: var(--ink-muted); }
blockquote { margin: 0; }

:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 3px; }

.skip-link { position: absolute; left: 8px; top: -200px; z-index: 200; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 4px; text-decoration: none; transition: top .2s var(--ease); }
.skip-link:focus { top: 8px; color: #fff; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ── Контейнеры ── */
.wrap { width: min(100% - 2 * var(--gap), var(--w-page)); margin-inline: auto; }
.text { width: min(100% - 2 * var(--gap), var(--w-text)); margin-inline: auto; }
.wide { width: min(100% - 2 * var(--gap), var(--w-wide)); margin-inline: auto; }
.section { padding-block: var(--gap-lg); }
.section--tight { padding-block: var(--gap-md); }
.stack > * + * { margin-top: var(--gap); }
.grid { display: grid; gap: var(--gap-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 880px) { .grid-2, .grid-3 { grid-template-columns: 1fr; gap: var(--gap); } }

/* ── MASTHEAD (шапка) ── */
.masthead { position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--paper) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule-strong); }
.masthead__bar { display: flex; align-items: center; gap: clamp(12px, 1.5vw, 22px); min-height: var(--header-h); }
.wordmark { display: inline-flex; flex: none; flex-direction: column; justify-content: center; gap: 2px; text-decoration: none; color: var(--ink); margin-right: auto; }
.wordmark__name { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.1rem, 1rem + .5vw, 1.25rem); line-height: 1.04; letter-spacing: -.01em; white-space: nowrap; }
.wordmark__sub { font-family: var(--font-sans); font-size: .62rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-muted); white-space: nowrap; }
@media (max-width: 560px) { .wordmark__sub { display: none; } }

.nav { display: flex; align-items: center; gap: 0; }
.nav a { font-family: var(--font-sans); font-size: .73rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; color: var(--ink-soft); text-decoration: none; padding: 8px 6px; border-radius: 3px; white-space: nowrap; }
.nav a:hover { color: var(--accent); background: var(--paper-deep); }
.nav a[aria-current="page"] { color: var(--accent); box-shadow: inset 0 -2px 0 var(--accent); }

.tools { display: inline-flex; align-items: center; gap: 4px; padding-left: 10px; margin-left: 2px; border-left: 1px solid var(--rule); }
.tools button { font-family: var(--font-sans); min-width: 29px; height: 30px; display: inline-grid; place-items: center; padding: 0 6px; border: 1px solid var(--rule-strong); border-radius: 3px; font-size: .76rem; font-weight: 600; color: var(--ink-soft); }
.tools button:hover { border-color: var(--accent); color: var(--accent); }
.tools button[aria-pressed="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }

.nav-toggle { display: none; align-items: center; gap: 8px; font-family: var(--font-sans); font-size: .78rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; padding: 9px 13px; border: 1px solid var(--rule-strong); border-radius: 3px; }
@media (max-width: 1200px) {
  .nav-toggle { display: inline-flex; }
  .nav { position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch; background: var(--surface); border-bottom: 1px solid var(--rule-strong); padding: 10px; box-shadow: var(--shadow); transform: translateY(-10px); opacity: 0; pointer-events: none; transition: opacity .2s var(--ease), transform .2s var(--ease); }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: 13px; font-size: .82rem; }
  .tools { order: 5; margin-top: 6px; padding-top: 10px; padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
}

/* ── Подвал ── */
.colophon { margin-top: var(--gap-xl); border-top: 2px solid var(--rule-ink); background: var(--paper-deep); }
.colophon__inner { padding-block: var(--gap-md); display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: var(--gap-md); }
@media (max-width: 820px) { .colophon__inner { grid-template-columns: 1fr; gap: var(--gap); } }
.colophon h4 { font-family: var(--font-sans); font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-muted); margin: 0 0 10px; }
.colophon a { color: var(--accent); }
.colophon__motto { font-family: var(--font-display); font-style: italic; font-size: 1.5rem; color: var(--ink); margin: 0 0 .3em; }
.colophon__fine { font-family: var(--font-sans); font-size: .78rem; color: var(--ink-muted); }

/* ── Плавные переходы между страницами (View Transitions API) ── */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vtOut .30s var(--ease) both; }
::view-transition-new(root) { animation: vtIn .46s var(--ease) both; }
@keyframes vtOut { to { opacity: 0; } }
@keyframes vtIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* Фолбэк-появление для браузеров без View Transitions (Safari/Firefox) */
@supports not (view-transition-name: none) {
  @media (prefers-reduced-motion: no-preference) {
    body { animation: pageFade .5s var(--ease) both; }
  }
}
@keyframes pageFade { from { opacity: 0; } to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root), ::view-transition-new(root) { animation: none !important; }
}

/* ── Параллакс: подготовка слоёв (clip + плавность) ── */
.hero--cover .hero__media img,
.figure--wide img { will-change: transform; }
.figure--wide { overflow: hidden; }

/* ── Печать ── */
@media print {
  .masthead, .colophon, .nav, .tools, .nav-toggle, .lightbox, .toc, .page-actions, [data-no-print] { display: none !important; }
  body { background: #fff; color: #000; font-size: 11.5pt; }
  a { color: #000; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 8pt; color: #555; }
  .figure, figure, .pullquote, .card { break-inside: avoid; }
  .hero__media { max-height: 9cm; overflow: hidden; }
}