/* ============================================================
   БАЗА: сброс, типографика, слои фона, каркас секций.
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Пока грузится загрузчик — страница не скроллится. */
body.is-booting { overflow: hidden; }

img, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--pink); color: var(--accent-fg); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* --- Скроллбар --- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #0a0610; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--pink), var(--violet));
  border: 2px solid #0a0610;
}

/* ============================================================
   ФОНОВЫЕ СЛОИ
   ============================================================ */

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.bg__grad {
  position: absolute;
  inset: -6%;
  width: 112%;
  height: 112%;
  filter: blur(54px) saturate(120%);
  opacity: .15;
  mix-blend-mode: screen;
}

.bg__rain {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .16;
  mix-blend-mode: screen;
}

.bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 100%);
  animation: grid-drift 24s linear infinite;
}

@keyframes grid-drift {
  to { background-position: 68px 68px, 68px 68px; }
}

.bg__grain {
  position: absolute;
  inset: 0;
  opacity: .07;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.42'/></svg>");
  background-size: 140px 140px;
  animation: grain 620ms steps(2) infinite;
}

@keyframes grain {
  0%   { transform: translate(0, 0); }
  50%  { transform: translate(-3px, 2px); }
  100% { transform: translate(2px, -2px); }
}

.bg__scan { display: none; }   /* сканлайны оставлены только в герое */

.bg__vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 140% 110% at 50% 45%, transparent 62%, rgba(3,1,6,.6) 100%);
}

/* ============================================================
   ТИПОГРАФИКА
   ============================================================ */

.h1-xl, .h2, .hero__title, .hero__big, .hero__final {
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  text-transform: var(--uppercase-display);
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-display);
  margin: 0;
}

.h2 { font-size: var(--step-3); margin-bottom: var(--space-3); }
.h1-xl { font-size: var(--step-5); }

.kicker {
  font-family: var(--font-accent);
  font-size: var(--step-xs);
  letter-spacing: 0.154em;
  text-transform: uppercase;
  color: var(--pink);
  margin: 0 0 var(--space-2);
}

.lead {
  font-size: var(--step-1);
  color: var(--fg-muted);
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
}
.lead--center { margin-inline: auto; text-align: center; }

.c-pink { color: var(--pink); }
.c-cyan { color: var(--cyan); }
.c-lime { color: var(--lime); }

.hint-drag {
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.099em;
  color: var(--fg-dim);
  margin: var(--space-2) 0 0;
}

/* ============================================================
   КАРКАС
   ============================================================ */

.wrap {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.section {
  position: relative;
  z-index: 1;
  padding: var(--space-7) 0;
}

.section--alt::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(255, 46, 136, .035) 40%, transparent);
  pointer-events: none;
}

/* Тонкая розовая линия-разделитель с «бегунком». */
.section + .section::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: min(100% - 2.5rem, var(--container));
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color) 20%, var(--border-color) 80%, transparent);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.25fr .85fr;
  gap: var(--space-6);
  align-items: start;
}

/* ============================================================
   КНОПКИ
   ============================================================ */

.btn {
  --btn-fg: var(--fg);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  padding: .85em 1.5em;
  font-family: var(--font-accent);
  font-size: var(--step-sm);
  font-weight: 700;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  color: var(--btn-fg);
  border: 1px solid var(--pink);
  background: transparent;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease), transform 120ms var(--ease);
  will-change: transform;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--pink), var(--violet));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 320ms var(--ease-sharp);
  z-index: -1;
}

.btn > span { position: relative; z-index: 1; }

.btn:hover {
  color: #fff;
  box-shadow: var(--glow-pink);
}
.btn:hover::before { transform: scaleX(1); }

.btn--solid {
  background: linear-gradient(120deg, var(--pink), var(--pink-deep));
  color: #fff;
  box-shadow: 0 0 0 rgba(255,46,136,0);
}
.btn--solid::before { background: linear-gradient(120deg, var(--violet), var(--pink)); }

.btn--ghost { border-color: var(--border-color); color: var(--fg-muted); }
.btn--ghost:hover { border-color: var(--pink); color: #fff; }

.btn--xl { padding: 1.15em 2.2em; font-size: var(--step-0); }

.btn__led {
  width: 6px; height: 6px;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
  animation: led 1.6s ease-in-out infinite;
}

@keyframes led {
  0%, 100% { opacity: .35; }
  50%      { opacity: 1; }
}

/* ============================================================
   НАВИГАЦИЯ
   ============================================================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: .9rem clamp(1rem, 3vw, 2rem);
  background: linear-gradient(180deg, rgba(5,5,6,.96), rgba(5,5,6,.82));
  border-bottom: 1px solid transparent;
  transform: translateY(0);
  transition: transform 420ms var(--ease), border-color var(--duration) var(--ease),
              background var(--duration) var(--ease);
}

.nav.is-hidden { transform: translateY(-110%); }
.nav.is-stuck  { border-bottom-color: var(--border-color); }

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.080em;
  font-size: var(--step-sm);
  margin-right: auto;
}

.nav__dot {
  width: 7px; height: 7px;
  background: var(--pink);
  box-shadow: var(--glow-pink);
  animation: led 1.4s ease-in-out infinite;
}

.nav__links {
  display: flex;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.110em;
  color: var(--fg-muted);
}

.nav__links a {
  position: relative;
  padding-bottom: 3px;
  transition: color var(--duration) var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--pink);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 300ms var(--ease-sharp);
}
.nav__links a:hover { color: var(--fg); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__links a.is-active { color: var(--pink); }

.burger { display: none; width: 34px; height: 26px; position: relative; }
.burger span {
  position: absolute; left: 0;
  width: 100%; height: 2px;
  background: var(--fg);
  transition: transform 300ms var(--ease), opacity 200ms linear;
}
.burger span:nth-child(1) { top: 3px; }
.burger span:nth-child(2) { top: 12px; }
.burger span:nth-child(3) { top: 21px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); background: var(--pink); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); background: var(--pink); }

/* ============================================================
   ПОДВАЛ
   ============================================================ */

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-color);
  padding: var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.066em;
  color: var(--fg-dim);
}

.footer__in {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  align-items: center;
}

.footer a { transition: color var(--duration) var(--ease); }
.footer a:hover { color: var(--pink); }

/* ============================================================
   ПОЯВЛЕНИЕ ЭЛЕМЕНТОВ
   ============================================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  /* Без blur: размытие на переходе читается как «мыло», особенно при скролле. */
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ============================================================
   АДАПТИВ
   ============================================================ */

@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; gap: var(--space-5); }
  .nav__links, .nav__cta { display: none; }
  .burger { display: block; }
  .section { padding: var(--space-6) 0; }
  .footer__in { justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; filter: none; }
}