:root{
  /* Layout */
  --container: 1120px;
  --gutter: 24px;

  /* Spacing scale */
  --s-8: 8px; --s-12: 12px; --s-16: 16px; --s-20: 20px;
  --s-24: 24px; --s-32: 32px; --s-40: 40px; --s-56: 56px; --s-72: 72px; --s-96: 96px;

  /* Radius */
  --r-12: 12px;
  --r-16: 16px;
  --r-20: 20px;

  /* Colors */
  --bg: #060814;
  --panel: rgba(255,255,255,0.035);
  --panel-2: rgba(255,255,255,0.05);
  --stroke: rgba(255,255,255,0.08);
  --stroke-2: rgba(255,255,255,0.12);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --muted-2: rgba(255,255,255,0.52);

  /* Accent */
  --acc: #7B6CFF;
  --acc-2: #A197FF;

  /* Shadows */
  --shadow-soft: 0 18px 60px rgba(0,0,0,0.55);
  --shadow-card: 0 10px 36px rgba(0,0,0,0.45);

  /* Borders */
  --hair: 1px solid var(--stroke);

  /* Typography */
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
}

*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin:0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow-x:hidden;
}

a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }

/* фон-слои */
.page{
  position: relative;
  min-height: 100vh;
}

.page::before{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 12% 14%, rgba(123,108,255,0.28), transparent 60%),
    radial-gradient(700px 520px at 80% 18%, rgba(123,108,255,0.12), transparent 55%),
    radial-gradient(900px 700px at 50% 80%, rgba(30,50,255,0.08), transparent 60%);
  opacity: 1;
  z-index: -3;
}

/* тонкая сетка */
.page::after{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.18;
  z-index: -2;
}

/* grain (шум) — без картинок */
.grain{
  position: fixed;
  inset: 0;
  pointer-events:none;
  z-index: -1;
  opacity: 0.10;
  background-image:
    repeating-radial-gradient(circle at 20% 30%, rgba(255,255,255,0.08), rgba(255,255,255,0.08) 1px, transparent 1px, transparent 6px);
  mix-blend-mode: overlay;
  filter: blur(0.6px);
}

.container{
  width: min(var(--container), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
  padding: 0 var(--gutter);
}

.section{
  padding: var(--s-96) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.section:first-of-type{
  border-top: none;
  padding-top: var(--s-72);
}

/* Заголовок секции */
.section__head{
  margin-bottom: var(--s-40);
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap: var(--s-8);
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
}

/* типографика */
h1{
  font-size: clamp(44px, 4.2vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 var(--s-24);
}

h2{
  font-size: clamp(28px, 2.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-16);
}

p{
  color: var(--muted);
  line-height: 1.62;
  margin: 0;
  max-width: 62ch;
}

/* Карточки */
.card{
  background: var(--panel);
  border-radius: var(--r-20);
  box-shadow: var(--shadow-card);
  padding: var(--s-24);
}

.card--soft{
  box-shadow: none;
  background: rgba(255,255,255,0.03);
}

.card--interactive{
  border: 1px solid var(--stroke);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.card--interactive:hover{
  transform: translateY(-2px);
  border-color: var(--stroke-2);
  background: rgba(255,255,255,0.045);
}

/* Quote */
.quote{
  display:flex;
  gap: var(--s-16);
  align-items:flex-start;
  padding: var(--s-20) var(--s-24);
  border-radius: var(--r-16);
  background: rgba(255,255,255,0.03);
}

.quote__bar{
  width: 2px;
  height: 100%;
  background: var(--acc);
  border-radius: 999px;
  box-shadow: 0 0 14px rgba(123,108,255,0.55);
  position: relative;
  flex-shrink: 0;
}

.quote__bar::before{
  content:"";
  position:absolute;
  top: 6px;
  left: 50%;
  width: 6px;
  height: 6px;
  transform: translateX(-50%);
  background: var(--acc);
  border-radius: 999px;
  box-shadow: 0 0 16px rgba(123,108,255,0.60);
}

.quote__text{
  color: rgba(255,255,255,0.86);
  line-height: 1.55;
}

/* Grid system */
.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--s-20);
}

.col-4{ grid-column: span 4; }
.col-6{ grid-column: span 6; }
.col-8{ grid-column: span 8; }
.col-12{ grid-column: span 12; }

@media (max-width: 980px){
  .grid{ grid-template-columns: 1fr; }
  .col-4,.col-6,.col-8,.col-12{ grid-column: span 1; }
}

/* Hero */
.hero{
  padding: var(--s-72) 0 var(--s-96);
}

.hero__wrap{
  display:grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: var(--s-32);
  align-items: center;
}

@media (max-width: 980px){
  .hero__wrap{ grid-template-columns: 1fr; }
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration:none;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}

.btn-primary{
  background: linear-gradient(180deg, rgba(123,108,255,1), rgba(98,85,255,1));
  color: white;
  box-shadow: 0 16px 48px rgba(123,108,255,0.30);
}

.btn-primary:hover{
  box-shadow: 0 18px 56px rgba(123,108,255,0.42);
  transform: translateY(-1px);
}

.btn-ghost{
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.10);
}

.btn-ghost:hover{
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.14);
}

/* Mini demo */
.mini-demo{
  margin-top: var(--s-24);
  padding: var(--s-20) var(--s-24);
  border-radius: var(--r-16);
  background: rgba(255,255,255,0.03);
}

.mini-demo__line{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  color: rgba(255,255,255,0.78);
  line-height: 1.7;
}

.mini-demo__line b{ color: rgba(255,255,255,0.95); }
.mini-demo__line .acc{ color: var(--acc-2); }

/* FAQ */
.faq{
  border-radius: var(--r-20);
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  overflow:hidden;
}

.faq__item{
  padding: var(--s-20) var(--s-24);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: var(--s-16);
  border-top: 1px solid rgba(255,255,255,0.06);
  cursor: pointer;
  transition: background 0.18s ease;
}

.faq__item:first-child{ border-top:none; }
.faq__item:hover{ background: rgba(255,255,255,0.02); }

.faq__q{
  font-weight: 600;
  color: rgba(255,255,255,0.88);
}

.faq__btn{
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display:grid;
  place-items:center;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq__item.active .faq__btn{
  transform: rotate(180deg);
}

.faq__a{
  display: none;
  padding: 0 var(--s-24) var(--s-20);
  color: var(--muted);
  line-height: 1.6;
}

.faq__item.active .faq__a{
  display: block;
}

/* CTA */
.cta{
  border-radius: 28px;
  padding: var(--s-40);
  background:
    radial-gradient(500px 220px at 16% 30%, rgba(123,108,255,0.24), transparent 70%),
    rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-soft);
}

.cta__wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: var(--s-32);
}

.cta__text{
  max-width: 52ch;
}

@media (max-width: 980px){
  .cta__wrap{ flex-direction:column; align-items:flex-start; }
}

/* Header */
.header{
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(6,8,20,0.8);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--s-16) 0;
}

.header__row{
  display:flex;
  align-items:center;
  justify-content: space-between;
}

.brand{
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

.nav{
  display:flex;
  gap: var(--s-24);
  align-items:center;
}

.nav__link{
  color: var(--muted);
  font-size: 14px;
  transition: color 0.18s ease;
}

.nav__link:hover{
  color: var(--text);
}

/* Footer */
.footer{
  padding: var(--s-32) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: var(--muted-2);
  font-size: 13px;
}

.footer__row{
  display:flex;
  align-items:center;
  justify-content: space-between;
}

/* Sticky CTA mobile */
.sticky{
  position: fixed;
  left: var(--s-16);
  right: var(--s-16);
  bottom: var(--s-16);
  height: 54px;
  border-radius: 999px;
  display:none;
  align-items:center;
  justify-content:center;
  background: linear-gradient(180deg, rgba(123,108,255,1), rgba(98,85,255,1));
  color: white;
  font-weight: 600;
  z-index: 30;
  box-shadow: 0 18px 60px rgba(123,108,255,0.28);
}

@media (max-width: 560px){
  .sticky{ display:flex; }
  .section{ padding: var(--s-56) 0; }
}