/* Страницы кейсов: та же палитра «Маршрут», одна колонка для чтения. */
:root {
  --bg: #06101E; --bg-2: #081628; --line: #12263D; --line-2: #1B3554;
  --cyan: #3BE0FF; --amber: #FFB547; --text: #E6F1FF; --muted: #7C93AE; --soft: #B9CBE0;
  --f: 'Geologica', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --m: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --pad: clamp(20px, 5vw, 72px);
  --nav: 64px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); color-scheme: dark; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--soft); font: 400 18px/1.65 var(--f); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: linear-gradient(rgba(18, 38, 61, .45) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 38, 61, .45) 1px, transparent 1px);
  background-size: 96px 96px; mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--cyan); text-underline-offset: 3px; }
::selection { background: var(--amber); color: #1A1204; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
.mono { font-family: var(--m); text-transform: uppercase; letter-spacing: .1em; }
.skip { position: absolute; left: 12px; top: -80px; z-index: 200; padding: 10px 16px; background: var(--amber); color: #1A1204; border-radius: 6px; font-weight: 700; text-decoration: none; }
.skip:focus { top: 12px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; height: 48px; padding: 0 22px;
  border-radius: 999px; border: 1px solid transparent; font: 600 15px/1 var(--f); text-decoration: none;
  transition: transform .25s cubic-bezier(.22, 1, .36, 1); white-space: nowrap; max-width: 100%;
}
.btn:hover { transform: translateY(-2px); }
.btn-amber { background: var(--amber); color: #1A1204; box-shadow: 0 8px 28px -10px rgba(255, 181, 71, .7); }
.btn-ghost { border-color: rgba(230, 241, 255, .28); color: var(--text); background: rgba(6, 16, 30, .4); }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn-lg { height: 58px; padding: 0 30px; font-size: 18px; }

.nav {
  position: sticky; top: 0; z-index: 50; height: var(--nav); display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 0 var(--pad); background: rgba(6, 16, 30, .82); border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; white-space: nowrap; }
.brand span { overflow: hidden; text-overflow: ellipsis; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-mark circle { fill: none; stroke: var(--cyan); stroke-width: 2.2; }
.brand-mark path { fill: none; stroke: var(--amber); stroke-width: 2.2; stroke-linecap: round; }

/* меню — как на главной (style.css), на узком экране прячется в бургер */
.nav-links { display: flex; gap: 2px; margin-left: auto; }
.nav-links a { padding: 8px 12px; font-size: 14px; color: var(--muted); text-decoration: none; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-drop { position: relative; }
.nav-drop summary { display: flex; align-items: center; gap: 7px; padding: 8px 12px; font-size: 14px; color: var(--muted); cursor: pointer; list-style: none; transition: color .2s; }
.nav-drop summary::-webkit-details-marker { display: none; }
.nav-drop summary::after { content: ""; width: 6px; height: 6px; border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: translateY(-2px) rotate(45deg); transition: transform .25s var(--ease); }
.nav-drop summary:hover, .nav-drop[open] summary { color: var(--text); }
.nav-drop[open] summary::after { transform: translateY(1px) rotate(-135deg); }
.nav-drop-list { position: absolute; top: calc(100% + 12px); right: 0; width: 280px; display: flex; flex-direction: column; padding: 6px; border: 1px solid var(--line-2); border-radius: 8px; background: rgba(6, 16, 30, .97); box-shadow: 0 24px 50px -20px rgba(0, 0, 0, .8); }
.nav-links .nav-drop-list a { padding: 11px 12px; border-radius: 6px; color: var(--soft); }
.nav-links .nav-drop-list a:hover { color: var(--text); background: rgba(59, 224, 255, .07); }
.nav-links .nav-drop-list a[aria-current] { color: var(--amber); }
.nav-menu { display: none; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line-2); background: transparent; color: var(--text); cursor: pointer; flex: none; }
.nav-menu svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.nav-menu[aria-expanded="true"] { border-color: var(--amber); color: var(--amber); }
@media (max-width: 1100px) {
  .nav-menu { display: grid; margin-left: auto; }
  .nav-links { display: none; position: absolute; top: calc(var(--nav) - 6px); left: var(--pad); right: var(--pad); flex-direction: column; gap: 0; margin: 0; padding: 6px; max-height: calc(100dvh - var(--nav)); overflow-y: auto; overflow-x: hidden; border: 1px solid var(--line-2); border-radius: 8px; background: var(--bg); box-shadow: 0 24px 50px -20px rgba(0, 0, 0, .8); }
  .nav.menu-open .nav-links { display: flex; }
  .nav-links a { padding: 13px 14px; font-size: 16px; color: var(--soft); border-bottom: 1px dashed var(--line-2); }
  .nav-drop summary { padding: 13px 14px; font-size: 16px; color: var(--soft); }
  .nav-drop-list { position: static; width: auto; padding: 0 0 6px 14px; border: 0; background: none; box-shadow: none; }
  .nav-links .nav-drop-list a { padding: 11px 14px; font-size: 15px; border-bottom: 0; }
}

.case { max-width: 760px; margin: 0 auto; padding: 40px 20px 72px; }
.case-back { display: inline-block; margin-bottom: 28px; font-size: 12px; color: var(--muted); text-decoration: none; }
.case-back:hover { color: var(--cyan); }
.case h1 { margin: 0; color: var(--text); font-size: clamp(32px, 6vw, 52px); line-height: 1.08; font-weight: 700; letter-spacing: -.01em; text-wrap: balance; }
.case-meta { margin: 16px 0 0; font-size: 12px; color: var(--muted); }
.case h2 { margin: 56px 0 16px; color: var(--text); font-size: clamp(24px, 4vw, 32px); line-height: 1.2; font-weight: 650; text-wrap: balance; }
.case h3 { margin: 36px 0 12px; color: var(--text); font-size: clamp(19px, 3vw, 22px); line-height: 1.3; font-weight: 650; }
.case p, .case ul, .case ol { margin: 0 0 18px; }
.case ul, .case ol { padding-left: 1.3em; }
.case li { margin-bottom: 10px; }
.case li::marker { color: var(--cyan); }
.case strong { color: var(--text); font-weight: 600; }
.case-fig { margin: 32px 0; }
.case-fig img { width: 100%; border-radius: 14px; border: 1px solid var(--line-2); background: var(--bg-2); }
.case-fig figcaption { margin-top: 10px; font-size: 14px; line-height: 1.45; color: var(--muted); }
.case h1 + .case-meta + .case-fig { margin-top: 32px; }
.case-cta { margin: 28px 0 0; }

.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 26px var(--pad) 30px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.foot a { color: var(--muted); }

@media (max-width: 560px) {
  body { font-size: 17px; }
  .brand span { display: none; }
  .case { padding-top: 28px; }
  .case-fig { margin: 24px -8px; }
  .case-fig figcaption { padding: 0 8px; }
  .btn-lg { width: 100%; }
}