/* Информационный сайт Staff Agent (staff-agent.ru). Системные шрифты (без загрузки), светлая и тёмная темы. */

:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7FB;
  --color-text: #111827;
  --color-text-muted: #6B7280;
  --color-accent: #4F46E5;
  --color-accent-hover: #4338CA;
  --color-accent-soft: #EEF2FF;
  --color-border: #E5E7EB;
  --color-code-bg: #F3F4F6;
  --color-header-bg: rgba(255, 255, 255, 0.94);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --radius: 14px;
  --container: 1080px;
  --reading: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0F1117;
    --color-bg-alt: #171A23;
    --color-text: #E5E7EB;
    --color-text-muted: #9CA3AF;
    --color-accent: #A5B4FC;
    --color-accent-hover: #C7D2FE;
    --color-accent-soft: #1E1B4B;
    --color-border: #2A2F3A;
    --color-code-bg: #1F2430;
    --color-header-bg: rgba(15, 17, 23, 0.94);
  }
}

/* ---------- База ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-wrap: break-word;
}

img { display: block; max-width: 100%; height: auto; }

a { color: var(--color-accent); text-underline-offset: 3px; }
a:hover { color: var(--color-accent-hover); }

:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.6em; }
h1 { font-size: clamp(1.75rem, 4.5vw, 2.5rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); }
h3 { font-size: 1.2rem; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 16px; }

.muted { color: var(--color-text-muted); }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; padding: 8px 12px; background: var(--color-bg); }

/* ---------- Шапка и подвал ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }

.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--color-text); text-decoration: none; }
.logo:hover { color: var(--color-accent); }

.nav { display: flex; gap: 20px; margin: 0; padding: 0; list-style: none; }
.nav a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--color-accent); }

main.container { padding-top: 32px; padding-bottom: 64px; }

.site-footer { border-top: 1px solid var(--color-border); background: var(--color-bg-alt); font-size: 0.9rem; color: var(--color-text-muted); }
.site-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-top: 24px; padding-bottom: 24px; }
.site-footer__inner p { margin: 0; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; padding: 0; list-style: none; }

/* ---------- Главная ---------- */

.hero { max-width: var(--reading); margin-bottom: 40px; }
.lead { font-size: 1.1rem; color: var(--color-text-muted); }

.cards { display: grid; gap: 16px; margin: 0; padding: 0; list-style: none; }

.card { padding: 20px; border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-bg); }
.card:hover { border-color: var(--color-accent); }
.card__title { margin-bottom: 8px; }
.card__title a { color: var(--color-text); text-decoration: none; }
.card__title a:hover { color: var(--color-accent); }
.card__text { margin: 0 0 8px; }

@media (min-width: 768px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Статья ---------- */

.crumbs { max-width: var(--reading); margin-bottom: 16px; font-size: 0.9rem; color: var(--color-text-muted); }
.crumbs a { color: var(--color-text-muted); }

.article { max-width: var(--reading); }
.article__head { margin-bottom: 24px; }
.meta { margin: 0; color: var(--color-text-muted); font-size: 0.95rem; }

.toc { margin: 0 0 32px; padding: 16px 20px; border-radius: var(--radius); background: var(--color-bg-alt); }
.toc__title { margin: 0 0 8px; font-weight: 700; }
.toc ol { margin: 0; padding-left: 1.3em; }

.prose { font-size: 1.06rem; }
.prose > * + * { margin-top: 1em; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose pre, .prose table { margin-bottom: 0; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.4em; }
.prose li + li { margin-top: 0.3em; }
.prose blockquote { margin-left: 0; margin-right: 0; padding: 12px 18px; border-left: 4px solid var(--color-accent); background: var(--color-accent-soft); border-radius: 0 var(--radius) var(--radius) 0; }
.prose blockquote p { margin: 0; }
.prose code { font-family: var(--font-mono); font-size: 0.9em; padding: 0.1em 0.35em; border-radius: 6px; background: var(--color-code-bg); }
.prose pre { overflow-x: auto; padding: 16px; border-radius: var(--radius); background: var(--color-code-bg); line-height: 1.5; }
.prose pre code { padding: 0; background: none; }
.prose table { display: block; overflow-x: auto; border-collapse: collapse; }
.prose th, .prose td { padding: 8px 12px; border: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.prose th { background: var(--color-bg-alt); }
.prose img { border-radius: var(--radius); }

.related { max-width: var(--reading); margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.related ul { margin: 0; padding-left: 1.2em; }
.related li + li { margin-top: 0.4em; }