/* ==========================================================================
   sigate.org — superintelligence statement
   Dark, modern, effect-driven. RTL-aware (logical properties), a11y-friendly.
   ========================================================================== */

:root {
  --bg: #05070f;
  --bg-soft: #080c18;
  --panel: rgba(255, 255, 255, .035);
  --panel-strong: rgba(255, 255, 255, .06);
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(255, 255, 255, .18);
  --text: #eaf0fb;
  --muted: #93a2bd;
  --muted-2: #6b7a95;
  --accent: #3cc6ff;
  --accent-2: #7c5cff;
  --accent-3: #2ee6a8;
  --warn: #ffb454;
  --warn-2: #ff7a59;
  --ok: #3ddc84;
  --radius: 20px;
  --radius-sm: 14px;
  --shell: 1200px;
  --shadow: 0 30px 80px rgba(2, 5, 15, .55);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font: "Inter var", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", "Noto Sans SC", "Noto Sans Devanagari", "Noto Sans Bengali", "Noto Sans Arabic", "Noto Naskh Arabic",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, dl, dd, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

.shell { width: min(100% - 40px, var(--shell)); margin-inline: auto; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon--sm { width: 18px; height: 18px; }
.icon--xs { width: 14px; height: 14px; }

.skip-link {
  position: fixed; inset-block-start: -100px; inset-inline-start: 16px; z-index: 100;
  padding: 10px 16px; border-radius: 10px; background: var(--accent); color: #04121c; font-weight: 600;
  transition: inset-block-start .2s var(--ease);
}
.skip-link:focus { inset-block-start: 16px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- background FX ------------------------------------------------- */

.aurora { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.aurora__blob {
  position: absolute; display: block; border-radius: 50%; filter: blur(90px); opacity: .5;
  animation: drift 26s var(--ease) infinite alternate;
}
.aurora__blob--1 { inset-block-start: -14vh; inset-inline-start: -8vw; width: 52vw; height: 52vw; background: radial-gradient(circle at 30% 30%, #1b64ff, transparent 62%); }
.aurora__blob--2 { inset-block-start: 16vh; inset-inline-end: -12vw; width: 46vw; height: 46vw; background: radial-gradient(circle at 60% 40%, #7c5cff, transparent 60%); animation-delay: -8s; }
.aurora__blob--3 { inset-block-end: -20vh; inset-inline-start: 26vw; width: 44vw; height: 44vw; background: radial-gradient(circle at 50% 50%, #0e7f8f, transparent 62%); animation-delay: -16s; opacity: .38; }

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4vw, 6vh, 0) scale(1.16); }
}

body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image: radial-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 25%, transparent 78%);
}

.cursor-glow {
  position: fixed; z-index: 0; width: 520px; height: 520px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgba(60, 198, 255, .10), transparent 62%);
  transform: translate3d(-50%, -50%, 0); opacity: 0; transition: opacity .4s var(--ease);
  will-change: transform;
}

.progress { position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 60; height: 2px; background: transparent; }
.progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3)); box-shadow: 0 0 18px rgba(60, 198, 255, .7); }

/* ---------- header -------------------------------------------------------- */

.site-header {
  position: sticky; inset-block-start: 0; z-index: 50;
  border-block-end: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease);
}
.site-header.is-stuck {
  background: rgba(5, 7, 15, .72);
  border-block-end-color: var(--line);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.site-header__inner { display: flex; align-items: center; gap: 22px; min-height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .01em; }
.brand__mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: conic-gradient(from 140deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  box-shadow: 0 0 22px rgba(60, 198, 255, .45);
  animation: spin 12s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.brand__text { font-size: 17px; }
.brand__tld { color: var(--muted-2); font-weight: 500; }

.nav { display: flex; gap: 26px; margin-inline-start: auto; }
.nav a { position: relative; font-size: 14.5px; color: var(--muted); transition: color .25s var(--ease); }
.nav a::after {
  content: ""; position: absolute; inset-block-end: -6px; inset-inline-start: 0; width: 100%; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0); transform-origin: inline-start; transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { transform: scaleX(1); }

.lang { position: relative; }
.lang__btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; font-size: 14px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; transition: color .25s, border-color .25s, background .25s;
}
.lang__btn:hover { color: var(--text); border-color: var(--line-strong); background: var(--panel); }
.lang__chev { transition: transform .3s var(--ease); }
.lang[data-open="true"] .lang__chev { transform: rotate(180deg); }
.lang__list {
  position: absolute; inset-block-start: calc(100% + 10px); inset-inline-end: 0; z-index: 20;
  min-width: 232px; padding: 8px; border: 1px solid var(--line); border-radius: 16px;
  background: rgba(10, 14, 26, .96); backdrop-filter: blur(18px); box-shadow: var(--shadow);
  display: grid; gap: 2px;
  opacity: 0; visibility: hidden; transform: translateY(-8px) scale(.98); transform-origin: top;
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  max-height: min(70vh, 520px); overflow-y: auto;
}
.lang[data-open="true"] .lang__list { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.lang__list a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 9px 12px; border-radius: 10px; font-size: 15px; color: var(--text);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.lang__list a:hover { background: var(--panel-strong); }
.lang__list a i { font-style: normal; font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted-2); }
.lang__list a[aria-selected="true"] { background: linear-gradient(90deg, rgba(60, 198, 255, .16), rgba(124, 92, 255, .12)); }
.lang__list a[aria-selected="true"] i { color: var(--accent); }

.burger { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; }
.burger span { display: block; width: 18px; height: 1.5px; margin: 4px auto; background: var(--text); transition: transform .3s var(--ease), opacity .3s; }
.burger[aria-expanded="true"] span:first-child { transform: translateY(2.75px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-2.75px) rotate(-45deg); }

/* ---------- typography ---------------------------------------------------- */

.eyebrow, .kicker {
  display: inline-flex; align-items: center; gap: 9px; font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before, .kicker::before { content: ""; width: 26px; height: 1px; background: currentColor; opacity: .6; }
.kicker--warn { color: var(--warn); }
.kicker--ok { color: var(--ok); }

.grad {
  background: linear-gradient(102deg, #ffffff 4%, #cfe4ff 34%, var(--accent) 62%, var(--accent-2) 96%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: sheen 9s ease-in-out infinite;
}
@keyframes sheen { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

/* ---------- hero ---------------------------------------------------------- */

.hero { position: relative; padding-block: clamp(64px, 11vw, 132px) clamp(56px, 9vw, 110px); overflow: hidden; }
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }
.hero__inner { position: relative; z-index: 1; max-width: 940px; }
.hero__title { font-size: clamp(30px, 11vw, 108px); line-height: .98; letter-spacing: -.03em; font-weight: 800; margin-block: 18px 0; overflow-wrap: break-word; }
.hero__subtitle { margin-block-start: 20px; font-size: clamp(19px, 2.3vw, 27px); color: #cddcf5; font-weight: 500; letter-spacing: -.01em; }
.hero__lead { margin-block-start: 20px; max-width: 700px; color: var(--muted); font-size: clamp(16px, 1.35vw, 18.5px); }

.rotator { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-block-start: 26px; color: var(--muted); font-size: 16px; }
.rotator__viewport { position: relative; display: inline-block; min-width: 8ch; }
.rotator__word {
  display: inline-block; font-weight: 700; color: var(--text);
  background: linear-gradient(90deg, var(--accent-3), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.rotator__word.is-out { opacity: 0; transform: translateY(-8px); }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-block-start: 34px; }

.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; border: 1px solid transparent; white-space: nowrap;
  transition: transform .25s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s;
}
.btn--primary {
  color: #04121c; background: linear-gradient(100deg, var(--accent), #9be3ff 55%, var(--accent-2));
  box-shadow: 0 14px 40px rgba(60, 198, 255, .28);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 20px 52px rgba(60, 198, 255, .42); }
.btn--ghost { color: var(--text); border-color: var(--line-strong); background: var(--panel); }
.btn--ghost:hover { transform: translateY(-2px); background: var(--panel-strong); border-color: rgba(255, 255, 255, .3); }
.btn--lg { padding: 17px 30px; font-size: 16.5px; }
.btn .icon { transition: transform .3s var(--ease); }
.btn:hover .icon { transform: translateX(4px); }
[dir="rtl"] .btn:hover .icon { transform: translateX(-4px); }
[dir="rtl"] .btn .icon { transform: scaleX(-1); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-block-start: 54px; }
.stat { padding-inline-start: 16px; border-inline-start: 1px solid var(--line); }
.stat__value { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.stat__label { margin-block-start: 7px; font-size: 13.5px; color: var(--muted-2); }

.scroll-hint { display: inline-flex; align-items: center; gap: 12px; margin-block-start: 46px; font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted-2); }
.scroll-hint__line { position: relative; width: 64px; height: 1px; background: var(--line-strong); overflow: hidden; }
.scroll-hint__line::after { content: ""; position: absolute; inset-block-start: 0; inset-inline-start: -50%; width: 50%; height: 100%; background: var(--accent); animation: slide 2.4s var(--ease) infinite; }
@keyframes slide { 0% { inset-inline-start: -50%; } 60%, 100% { inset-inline-start: 100%; } }

/* ---------- sections ------------------------------------------------------ */

.section { position: relative; padding-block: clamp(64px, 8vw, 116px); }
.section__head { max-width: 860px; margin-block-end: clamp(34px, 4vw, 56px); }
.section__title { margin-block-start: 14px; font-size: clamp(30px, 4.4vw, 52px); line-height: 1.06; letter-spacing: -.025em; font-weight: 780; }
.section__lead { margin-block-start: 18px; color: var(--muted); font-size: clamp(16px, 1.25vw, 18px); max-width: 760px; }
.lead { font-size: clamp(17px, 1.4vw, 20px); color: #c6d4ea; }

.about { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(28px, 4vw, 56px); align-items: start; }
.about__text p + p { margin-block-start: 18px; color: var(--muted); }

.cards { display: grid; gap: 18px; }
.cards--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative; padding: 26px 24px 28px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .015));
  overflow: hidden; isolation: isolate;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%), rgba(60, 198, 255, .16), transparent 60%);
  transition: opacity .4s var(--ease);
}
.card:hover { transform: translateY(-5px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card__title { font-size: 19px; font-weight: 680; letter-spacing: -.012em; }
.card__text { margin-block-start: 10px; color: var(--muted); font-size: 15.4px; }
.card__index { display: inline-block; margin-block-end: 12px; font-family: var(--mono); font-size: 12px; letter-spacing: .12em; color: var(--muted-2); }
.card__icon {
  display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; margin-block-end: 16px;
  border: 1px solid var(--line); border-radius: 14px; color: var(--accent);
  background: linear-gradient(160deg, rgba(60, 198, 255, .14), rgba(124, 92, 255, .1));
}
.card--icon:hover .card__icon { color: #fff; background: linear-gradient(160deg, rgba(60, 198, 255, .3), rgba(124, 92, 255, .24)); }

.section--risk .card--risk { border-color: rgba(255, 180, 84, .16); background: linear-gradient(180deg, rgba(255, 180, 84, .055), rgba(255, 255, 255, .012)); }
.section--risk .card--risk::before { background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 122, 89, .2), transparent 60%); }
.section--risk .card--risk .card__index { color: var(--warn); }

.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; counter-reset: p; }
.principle {
  display: flex; gap: 16px; padding: 24px 22px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--panel); transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.principle:hover { transform: translateY(-4px); border-color: rgba(61, 220, 132, .34); background: var(--panel-strong); }
.principle__num { font-family: var(--mono); font-size: 13px; color: var(--ok); padding-block-start: 3px; }
.principle__title { font-size: 17.5px; font-weight: 660; }
.principle__text { margin-block-start: 8px; color: var(--muted); font-size: 15px; }

/* ---------- language band ------------------------------------------------- */

.band { position: relative; padding-block: clamp(44px, 5vw, 70px); border-block: 1px solid var(--line); background: linear-gradient(180deg, rgba(60, 198, 255, .05), transparent 70%); overflow: hidden; }
.band__inner { text-align: center; max-width: 820px; }
.band__title { font-size: clamp(24px, 3vw, 36px); font-weight: 760; letter-spacing: -.02em; }
.band__text { margin-block-start: 12px; color: var(--muted); font-size: clamp(15px, 1.3vw, 17px); }

.marquee { margin-block-start: 30px; overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track { display: flex; gap: 46px; width: max-content; direction: ltr; animation: marquee 38s linear infinite; }
.marquee__track span { font-size: clamp(20px, 2.4vw, 30px); font-weight: 600; color: rgba(234, 240, 251, .28); white-space: nowrap; transition: color .3s; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span:hover { color: var(--text); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- CTA + footer -------------------------------------------------- */

.cta { padding-block: clamp(70px, 9vw, 130px); text-align: center; background: radial-gradient(700px 320px at 50% 0%, rgba(124, 92, 255, .16), transparent 70%); }
.cta__inner { max-width: 820px; }
.cta__title { font-size: clamp(32px, 5vw, 60px); font-weight: 800; letter-spacing: -.03em; line-height: 1.04; }
.cta__text { margin-block: 20px 30px; color: var(--muted); font-size: clamp(16px, 1.4vw, 19px); }
.cta__note { margin-block-start: 20px; font-size: 13.5px; color: var(--muted-2); }

.site-footer { border-block-start: 1px solid var(--line); padding-block: 48px; background: var(--bg-soft); }
.site-footer__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
.site-footer__brand { display: grid; gap: 12px; justify-items: start; }
.site-footer__tagline { color: var(--muted); font-size: 15px; max-width: 420px; }
.site-footer__meta { display: grid; gap: 12px; justify-items: end; text-align: end; color: var(--muted-2); font-size: 13.5px; max-width: 460px; margin-inline-start: auto; }
.site-footer__row { display: inline-flex; align-items: center; gap: 10px; }
.site-footer .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--muted-2); }

.noscript { padding: 16px 20px; background: #2a1c05; color: #ffd79a; text-align: center; font-size: 14px; }

/* ---------- motion -------------------------------------------------------- */

/* Появление по скроллу включается только при работающем JS: без него контент
   остаётся видимым (важно для поисковых роботов и режима без скриптов). */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease) var(--d, 0s), transform .8s var(--ease) var(--d, 0s); }
.js .reveal.is-visible { opacity: 1; transform: none; }

.tilt { transform-style: preserve-3d; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .js .reveal { opacity: 1; transform: none; }
  .cursor-glow { display: none; }
}

/* ---------- responsive ---------------------------------------------------- */

@media (max-width: 1080px) {
  .cards--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  body { font-size: 16px; }
  .burger { display: block; }
  .nav {
    position: fixed; inset-block-start: 72px; inset-inline: 12px; z-index: 40;
    flex-direction: column; gap: 4px; margin: 0; padding: 14px;
    border: 1px solid var(--line); border-radius: 18px; background: rgba(8, 12, 24, .97);
    backdrop-filter: blur(18px); box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 11px 6px; font-size: 16px; color: var(--text); }
  .nav a::after { display: none; }
  .lang { margin-inline-start: auto; }
  .lang__list { min-width: min(78vw, 280px); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 14px; }
  .cards--3, .principles { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__meta { justify-items: start; text-align: start; margin-inline-start: 0; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 28px, var(--shell)); }
  .cards--4 { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .lang__btn span { display: none; }
  .lang__btn::after { content: attr(data-code); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
}

@media (hover: none) {
  .cursor-glow { display: none; }
}