/* ============================================================
   NEURA AI — SEO-портал. Тёмная нейро-эстетика.
   bg #0B0F1A · violet #8B5CF6 → cyan #06B6D4 · glassmorphism
   Шрифты: Unbounded (display) + Manrope (текст)
   ============================================================ */

:root {
  --bg: #0B0F1A;
  --bg-2: #101629;
  --bg-3: #161D36;
  --card: rgba(255, 255, 255, 0.045);
  --card-2: rgba(255, 255, 255, 0.07);
  --stroke: rgba(255, 255, 255, 0.10);
  --stroke-2: rgba(255, 255, 255, 0.18);
  --text: #F2F5FF;
  --muted: #AAB4D6;
  --muted-2: #6E7799;
  --violet: #8B5CF6;
  --violet-2: #A78BFA;
  --cyan: #06B6D4;
  --cyan-2: #22D3EE;
  --pink: #EC4899;
  --grad: linear-gradient(100deg, #A78BFA 0%, #8B5CF6 38%, #06B6D4 78%, #22D3EE 100%);
  --grad-btn: linear-gradient(100deg, #8B5CF6 0%, #6D28D9 48%, #0891B2 100%);
  --grad-soft: linear-gradient(100deg, rgba(167, 139, 250, .14), rgba(6, 182, 212, .14));
  --radius: 18px;
  --radius-lg: 26px;
  --font-display: "Unbounded", "Arial Black", system-ui, sans-serif;
  --font-body: "Manrope", "Segoe UI", system-ui, -apple-system, sans-serif;
  --max-w: 1240px;
  --shadow: 0 24px 60px -28px rgba(0, 0, 0, .7);
  --glow-violet: 0 0 0 1px rgba(139, 92, 246, .35), 0 18px 60px -20px rgba(139, 92, 246, .5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Фоновые слои: градиентные меши + зерно ─────────────────── */
.bg-fx { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.bg-fx::before {
  content: "";
  position: absolute;
  width: 72vw; height: 72vw; max-width: 980px; max-height: 980px;
  top: -26vw; left: -12vw;
  background: radial-gradient(circle at center, rgba(139, 92, 246, .30), transparent 62%);
  filter: blur(20px);
  animation: drift 26s ease-in-out infinite alternate;
}
.bg-fx::after {
  content: "";
  position: absolute;
  width: 64vw; height: 64vw; max-width: 860px; max-height: 860px;
  bottom: -22vw; right: -14vw;
  background: radial-gradient(circle at center, rgba(6, 182, 212, .22), transparent 62%);
  filter: blur(24px);
  animation: drift 32s ease-in-out infinite alternate-reverse;
}
.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(4%, 3%, 0) scale(1.08); }
}

/* ── Типографика ─────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 0 0 .6em;
}
h1 { font-size: clamp(30px, 5.4vw, 56px); }
h2 { font-size: clamp(22px, 3.2vw, 34px); }
h3 { font-size: clamp(17px, 2.2vw, 22px); }
p { margin: 0 0 1em; }
a { color: var(--cyan-2); text-decoration: none; }
a:hover { color: var(--violet-2); }
small { color: var(--muted-2); }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.lead { font-size: clamp(16px, 1.7vw, 19px); color: var(--muted); max-width: 66ch; }
.lead strong { color: var(--text); }

/* ── Хедер ───────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(11, 15, 26, .72);
  border-bottom: 1px solid var(--stroke);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; padding: 14px 20px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: 18px;
  color: var(--text); letter-spacing: .02em;
}
.brand .brand-logo { width: 30px; height: 30px; border-radius: 50%; filter: drop-shadow(0 0 12px rgba(139,92,246,.6)); }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--muted); padding: 8px 13px; border-radius: 10px;
  font-weight: 600; font-size: 15px; transition: .2s;
}
.main-nav a:hover { color: var(--text); background: var(--card-2); }
.main-nav a.active { color: var(--text); background: var(--grad-soft); box-shadow: inset 0 0 0 1px var(--stroke-2); }
.main-nav .nav-cta {
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  color: #fff; background: var(--grad-btn); padding: 10px 18px; border-radius: 12px;
  box-shadow: 0 10px 30px -10px rgba(139,92,246,.7);
  transition: transform .2s, box-shadow .2s;
}
.main-nav .nav-cta:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 16px 38px -12px rgba(6,182,212,.6); }

/* Бургер */
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 22px; height: 2px; border-radius: 2px; background: var(--text); transition: .25s; }
body.nav-open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .burger span:nth-child(2) { opacity: 0; }
body.nav-open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero / секции ───────────────────────────────────────────── */
.hero {
  position: relative;
  max-width: var(--max-w); margin: 0 auto;
  padding: clamp(48px, 9vw, 110px) 20px clamp(40px, 7vw, 80px);
  text-align: center;
}
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--violet-2); background: var(--grad-soft);
  border: 1px solid var(--stroke-2); border-radius: 999px;
  padding: 7px 15px; margin-bottom: 22px;
}
.hero h1 { margin-bottom: 18px; }
.hero .lead { margin: 0 auto 30px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: -10px auto 40px; max-width: 720px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13.5px; font-weight: 600; color: var(--violet-2);
  background: var(--card); border: 1px solid var(--stroke-2);
  border-radius: 999px; padding: 8px 14px;
}
.hero-cta { display: flex; justify-content: center; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  padding: 15px 26px; border-radius: 14px; cursor: pointer;
  transition: transform .18s, box-shadow .18s, background .18s;
  text-decoration: none;
}
.btn-primary { color: #fff; background: var(--grad-btn); box-shadow: 0 18px 44px -14px rgba(139,92,246,.75); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 24px 56px -16px rgba(6,182,212,.7); }
.btn-ghost { color: var(--text); background: var(--card); border: 1px solid var(--stroke-2); }
.btn-ghost:hover { background: var(--card-2); transform: translateY(-2px); }

.section { max-width: var(--max-w); margin: 0 auto; padding: 40px 20px 56px; }
.section-head { text-align: center; margin-bottom: 34px; }
.section-head p { max-width: 60ch; margin: 0 auto; color: var(--muted); }
.eyebrow {
  font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: var(--cyan-2); margin-bottom: 10px;
}

/* ── Карточки ────────────────────────────────────────────────── */
.grid { display: grid; gap: 24px; }
/* auto-fill + minmax: колонки не уже минимума, сами складываются по ширине экрана */
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 26px 24px;
  overflow: hidden;
  transition: transform .22s, border-color .22s, background .22s, box-shadow .22s;
  display: flex; flex-direction: column; gap: 12px;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--grad); opacity: 0; transition: opacity .25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--stroke-2); background: var(--card-2); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card .ico { font-size: 32px; line-height: 1; }
.card h3 { margin: 0; font-size: 18px; }
.card .desc { color: var(--muted); font-size: 15px; font-weight: 500; line-height: 1.6; flex: 1; }
.card .meta { color: var(--muted-2); font-size: 13px; }
.card-link { position: absolute; inset: 0; z-index: 1; }

/* ── Крошки ──────────────────────────────────────────────────── */
.crumbs { max-width: var(--max-w); margin: 0 auto; padding: 22px 20px 0; font-size: 13.5px; color: var(--muted-2); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 7px; list-style: none; margin: 0; padding: 0; }
.crumbs li + li::before { content: "›"; margin-right: 7px; color: var(--muted-2); }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--cyan-2); }
.crumbs [aria-current] { color: var(--text); }

/* ── Контент страницы ────────────────────────────────────────── */
.content-page { max-width: 860px; margin: 0 auto; padding: 10px 20px 56px; }
.content-page .card { background: transparent; padding: 0; }
.prose .post-meta {
  font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted-2); margin: 0 0 4px;
}
.prose h2 { margin-top: 40px; padding-top: 8px; }
.prose h2::before { content: ""; display: block; width: 44px; height: 3px; border-radius: 2px; background: var(--grad); margin-bottom: 14px; }
.prose h3 { margin-top: 28px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 1em; }
.prose li { margin-bottom: .45em; }
.prose li::marker { color: var(--violet-2); }
.steps { display: grid; gap: 14px; margin: 22px 0; }
.step { display: flex; gap: 14px; align-items: flex-start; }
.step .num {
  flex: 0 0 34px; height: 34px; border-radius: 11px;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700; font-size: 15px;
  color: #0B0F1A; background: var(--grad);
}
.step p { margin: 0; color: var(--muted); }
.step strong { color: var(--text); }

/* ── Статья со списком команд ────────────────────────────────── */
.post-figs { display: grid; gap: 20px; margin: 22px 0 4px; }
.post-fig { margin: 0; }
.post-fig img {
  width: 100%; display: block; border-radius: var(--radius);
  border: 1px solid var(--stroke); background: var(--card);
}
.post-fig figcaption { margin-top: 10px; text-align: center; color: var(--muted-2); font-size: 14px; }
.cmd-toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.cmd-chip {
  display: inline-block; padding: 8px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--stroke);
  color: var(--muted); font-size: 14px; font-weight: 600;
}
.cmd-chip:hover { color: var(--text); background: var(--card-2); border-color: var(--stroke-2); }
.prose h3[id^="cmd-"] { scroll-margin-top: 90px; }
.prose .cmd-list {
  list-style: none; padding: 0; margin: 0 0 8px;
  display: grid; gap: 8px;
}
.prose .cmd-list li { display: flex; gap: 12px; align-items: baseline; margin: 0; }
.cmd-list code {
  flex: 0 0 210px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13.5px; color: var(--cyan-2);
  background: var(--card); border: 1px solid var(--stroke); border-radius: 8px;
  padding: 3px 9px; text-align: center;
}
.cmd-list li span { flex: 1; color: var(--muted); font-size: 15px; line-height: 1.6; }

/* ── FAQ ─────────────────────────────────────────────────────── */
.faq { display: grid; gap: 12px; margin-top: 26px; }
.faq-narrow { max-width: 860px; margin: 26px auto 0; }
.faq details { background: var(--card); border: 1px solid var(--stroke); border-radius: 14px; overflow: hidden; transition: border-color .2s; }
.faq details[open] { border-color: var(--stroke-2); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  cursor: pointer; list-style: none; padding: 18px 24px;
  font-weight: 700; color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-size: 22px; font-weight: 400; color: var(--violet-2);
  transition: transform .2s; line-height: 1;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .a { padding: 0 24px 22px; color: var(--muted); line-height: 1.65; }

/* ── Пример генерации (табы: промт → результат) ──────────────────── */
.ex-tabs { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 24px; }
.ex-tab {
  font-family: var(--font-body); font-weight: 700; font-size: 14px; cursor: pointer;
  color: var(--muted); background: var(--card); border: 1px solid var(--stroke);
  padding: 10px 18px; border-radius: 12px; transition: .2s;
}
.ex-tab:hover { color: var(--text); background: var(--card-2); }
.ex-tab.active {
  color: #fff; background: var(--grad-btn); border-color: transparent;
  box-shadow: 0 12px 30px -12px rgba(139, 92, 246, .75);
}
.ex-panels { max-width: 720px; margin: 0 auto; }
.ex-panel { display: none; }
.ex-panel.active { display: block; animation: exFade .35s ease; }
.ex-prompt {
  font-family: var(--font-display); font-weight: 500; font-size: 15px; line-height: 1.65;
  background: var(--card); border: 1px solid var(--stroke); border-radius: 14px;
  padding: 18px 22px; margin-bottom: 18px; color: var(--text);
}
.ex-refs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin-bottom: 18px; padding: 10px 14px; border-radius: 14px;
  background: var(--card); border: 1px dashed var(--stroke);
}
.ex-ref-label {
  font-family: var(--font-body); font-weight: 700; font-size: 12px;
  letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}
.ex-ref {
  width: 96px; height: 96px; object-fit: cover; border-radius: 10px;
  border: 1px solid var(--stroke-2); box-shadow: var(--shadow);
}
.ex-img {
  display: block; width: 100%; height: auto; border-radius: 16px;
  border: 1px solid var(--stroke-2); box-shadow: var(--shadow);
}
@keyframes exFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ── До и после (фотофункции) ───────────────────────────────── */
.ba-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  max-width: 860px; margin: 0 auto;
}
.ba-fig { margin: 0; }
.ba-fig figcaption {
  text-align: center; margin-top: 12px;
  font-family: var(--font-body); font-weight: 700; font-size: 13px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.ba-img {
  display: block; width: 100%; height: auto; border-radius: 16px;
  border: 1px solid var(--stroke-2); box-shadow: var(--shadow);
  background: #fff;
}

/* ── Пример открытки (поздравления) ─────────────────────────── */
.card-ex-wrap { max-width: 460px; margin: 0 auto; }
.card-ex { margin: 0; }
.card-ex-img {
  display: block; width: 100%; height: auto; border-radius: 18px;
  border: 1px solid var(--stroke-2); box-shadow: var(--shadow);
}

/* ── CTA-блок ────────────────────────────────────────────────── */
.cta-band {
  max-width: var(--max-w); margin: 0 auto 60px; padding: 0 20px;
}
.cta-band .inner {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke-2);
  background: linear-gradient(135deg, rgba(139,92,246,.18), rgba(6,182,212,.14));
  text-align: center; padding: clamp(36px, 6vw, 64px) 24px;
}
.cta-band .inner::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background: radial-gradient(60% 80% at 50% 0%, rgba(139,92,246,.35), transparent 70%);
  pointer-events: none;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: var(--muted); max-width: 56ch; margin: 0 auto 26px; }

/* ── Футер ───────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--stroke); background: rgba(11, 15, 26, .6); margin-top: 20px; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 40px 20px 30px; display: grid; gap: 28px; }
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.footer-cols h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted-2); margin: 0 0 12px; }
.footer-cols a { display: block; color: var(--muted); padding: 4px 0; font-size: 14.5px; }
.footer-cols a:hover { color: var(--cyan-2); }
.footer-bottom { border-top: 1px solid var(--stroke); padding-top: 20px; margin-top: 8px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted-2); font-size: 13.5px; }

/* ── Анимации появления ──────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ── Адаптив ─────────────────────────────────────────────────── */
@media (max-width: 980px) {
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-cta { display: none; }
  .burger { display: flex; }
  .main-nav {
    position: fixed; top: 62px; right: 14px; left: 14px;
    flex-direction: column; align-items: stretch; gap: 6px;
    background: rgba(16, 22, 41, .96); border: 1px solid var(--stroke-2); border-radius: 16px;
    padding: 12px; backdrop-filter: blur(18px);
    transform: translateY(-14px); opacity: 0; pointer-events: none;
    transition: .22s;
  }
  body.nav-open .main-nav { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 12px; text-align: center; }
  .step { flex-direction: row; align-items: flex-start; }
  .step .num { flex: 0 0 36px; height: 36px; font-size: 16px; border-radius: 12px; }
  .prose .cmd-list li { flex-direction: column; gap: 4px; }
  .cmd-list code { flex: none; }
}