:root {
  --bg: oklch(14% 0.02 160);
  --emerald: #39ff14;
  --emerald-10: color-mix(in oklch, var(--emerald) 10%, transparent);
  --emerald-20: color-mix(in oklch, var(--emerald) 20%, transparent);
  --text: oklch(92% 0.01 250);
  --text-muted: color-mix(in oklch, var(--text) 50%, transparent);
  --text-dim: color-mix(in oklch, var(--text) 20%, transparent);
  --card-bg: color-mix(in oklch, oklch(15% 0.02 160) 75%, transparent);
  --sans: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --mono: 'SF Mono', 'Cascadia Code', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(34, 78, 122, 0.18), transparent 55%),
    radial-gradient(110% 80% at 16% 82%, rgba(80, 46, 130, 0.16), transparent 58%),
    radial-gradient(140% 120% at 50% 32%, rgba(10, 16, 34, 0.9), rgba(3, 5, 12, 0.96) 60%),
    #02030a;
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  isolation: isolate;
}

/* ══════════════════════════════════════════════════════════════════════════
   HERO (Canvas + UI)
   ══════════════════════════════════════════════════════════════════════════ */
.grid-hero {
  position: relative;
  height: 100vh;
  height: 100dvh;
  min-height: 100svh;
  overflow: hidden;
}

canvas#gridCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  min-height: 100svh;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.grid-hero,
.section,
.site-footer,
.audio-btn {
  position: relative;
  z-index: 1;
}

.grid-ui {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: max(76px, calc(60px + env(safe-area-inset-top, 0px))) 24px 36px;
  pointer-events: none;
}

.grid-eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--emerald);
  margin-bottom: 16px;
}

.grid-ui h1 {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  text-shadow: 0 0 40px rgba(16,185,129,0.15);
}

.grid-sub {
  color: var(--text-muted);
  margin-top: 12px;
  font-size: 0.95rem;
  text-align: center;
  max-width: 420px;
  line-height: 1.6;
}

.grid-nav {
  margin-top: 40px;
  pointer-events: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.grid-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 14px 28px;
  border: 1px solid rgba(226,232,240,0.08);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  background: rgba(4,16,12,0.5);
  transition: 0.3s var(--ease);
  font-size: 0.9rem;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.grid-nav a:hover {
  border-color: var(--emerald);
  background: var(--emerald-10);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.grid-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.grid-scroll-hint span {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.grid-scroll-bar {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--emerald), transparent);
  animation: scrollPulse 2.5s infinite ease-in-out;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50%      { opacity: 1;   transform: scaleY(1); }
}

/* ══════════════════════════════════════════════════════════════════════════
   SECTIONS (Below hero)
   ══════════════════════════════════════════════════════════════════════════ */
.section {
  padding: 100px 32px;
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: clamp(0.88rem, 1.15vw, 1.08rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--emerald);
  margin-bottom: 34px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-shadow: 0 0 14px rgba(57, 255, 20, 0.38);
}

.section-label::after {
  content: "";
  width: clamp(64px, 9vw, 118px);
  height: 2px;
  background: linear-gradient(90deg, #39ff14, transparent);
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.42);
}

/* ── About ── */
.about-text {
  max-width: 820px;
  padding-left: 18px;
  border-left: 2px solid rgba(57,255,20,0.64);
  font-size: clamp(1.55rem, 2.7vw, 2.25rem);
  font-weight: 720;
  letter-spacing: -0.025em;
  line-height: 1.34;
  color: rgba(246,255,245,0.90);
  text-shadow: 0 0 24px rgba(57,255,20,0.08);
}
.about-text strong {
  font-family: var(--mono);
  font-size: 0.78em;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--emerald);
  text-shadow: 0 0 16px rgba(57,255,20,0.28);
}

/* ── Module Cards ── */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.module-card {
  background: rgba(3, 10, 11, 0.97);
  border: 1px solid rgba(57,255,20,0.16);
  border-radius: 14px;
  padding: 26px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.18s ease;
  position: relative;
  overflow: hidden;
  min-height: 48px;
}

.module-card::before {
  content: none;
}

.module-card > * {
  position: relative;
  z-index: 1;
}

.module-card a,
.module-card .js-open-article {
  position: relative;
  z-index: 2;
  pointer-events: auto;
}

.module-card:hover {
  border-color: rgba(57,255,20,0.28);
  background: rgba(3, 10, 11, 0.97);
}

.module-card:hover::before {
  opacity: 0;
}

.mc-index {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--emerald);
  letter-spacing: 0.15em;
}
.mc-title {
  font-size: clamp(1.42rem, 2vw, 1.72rem);
  font-weight: 850;
  letter-spacing: -0.02em;
  color: #eaffdf;
  text-shadow: 0 0 16px rgba(57, 255, 20, 0.18);
}
.mc-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.58; }
.mc-tag { font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim); margin-top: auto; }
.mc-action {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  min-height: 44px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--emerald);
  letter-spacing: 0.05em;
  margin-top: 8px;
}

/* ── Stack ── */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.stack-item {
  padding: 32px;
  background: rgba(3, 10, 11, 0.97);
  border: 1px solid rgba(57,255,20,0.16);
  border-radius: 12px;
  transition: border-color 0.18s ease;
}
.stack-item:hover {
  border-color: rgba(57,255,20,0.26);
  background: rgba(3, 10, 11, 0.97);
}
.stack-item h3 {
  font-size: clamp(1.28rem, 1.55vw, 1.54rem);
  font-weight: 850;
  margin-bottom: 12px;
  color: #eaffdf;
  text-shadow: 0 0 14px rgba(57, 255, 20, 0.16);
}
.stack-item p { font-size: 0.98rem; color: rgba(238,250,244,0.72); line-height: 1.54; }

/* ── Contact ── */
.contact-center {
  text-align: center;
  padding: 40px 0 100px;
}
.contact-center h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.contact-center p {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 400px;
  margin: 0 auto 28px;
  line-height: 1.6;
}
.contact-cta {
  display: inline-flex;
  padding: 14px 32px;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--bg);
  background: var(--emerald);
  border-radius: 6px;
  transition: 0.3s;
}
.contact-cta:hover {
  background: #fff;
  box-shadow: 0 0 30px var(--emerald-10);
}

/* ── Footer ── */
.site-footer {
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(226,232,240,0.06);
  max-width: 1100px;
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-dim);
}

/* ── Audio btn ── */
.audio-btn {
  position: fixed; top: 24px; right: 32px; z-index: 100;
  background: rgba(2,10,7,0.6); backdrop-filter: blur(8px);
  border: 1px solid var(--text-dim);
  color: var(--text-muted); padding: 6px 14px;
  min-height: 44px;
  font-family: var(--mono); font-size: 0.65rem;
  letter-spacing: 0.1em; cursor: pointer; border-radius: 20px;
  display: flex; align-items: center; gap: 6px; transition: 0.3s;
}
.audio-btn:hover, .audio-btn.on { border-color: var(--emerald); color: var(--emerald); }
.audio-dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.audio-btn.on .audio-dot { animation: pulse 1s infinite alternate; }
@keyframes pulse { from { transform: scale(0.8); } to { transform: scale(1.5); } }

/* ── Scroll reveal: static in V4 candidate to avoid card flicker over canvas ── */
.reveal,
.reveal.visible {
  opacity: 1;
  transform: none;
  transition: none;
}

/* ══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

@media (max-width: 980px) {
  .module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .grid-hero { height: auto; min-height: 100svh; }
  .grid-ui { padding: 80px 20px 116px; align-items: center; }
  .grid-ui h1 { font-size: clamp(2.35rem, 12vw, 2.9rem); letter-spacing: -0.055em; }
  .grid-sub { max-width: 32ch; }
  .grid-nav {
    width: min(100%, 360px);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .grid-nav a {
    min-height: 48px;
    padding: 0 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    white-space: nowrap;
  }
  .section { padding: 60px 20px; }
  .module-grid { grid-template-columns: 1fr; }
  .module-card {
    padding: 20px;
    border-radius: 12px;
  }
  .stack-grid { grid-template-columns: 1fr; }
  .audio-btn { top: 82px; right: 14px; opacity: 0.76; }
}

@media (max-width: 380px) {
  .grid-ui {
    align-items: center;
    padding-left: 20px;
    padding-right: 20px;
  }
  .grid-ui h1,
  .grid-sub,
  .grid-nav {
    width: 320px;
    max-width: 320px;
    text-align: center;
  }
  .grid-nav { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .grid-ui {
    align-items: center;
    padding-left: 20px;
    padding-right: 20px;
    width: 100%;
    max-width: 100vw;
  }
  .grid-eyebrow {
    max-width: calc(100vw - 40px);
    text-align: center;
    line-height: 1.8;
    letter-spacing: 0.18em;
    overflow-wrap: anywhere;
  }
  .grid-ui h1,
  .grid-sub {
    width: min(340px, calc(100vw - 40px));
    max-width: 100%;
    text-align: center;
  }
  .grid-nav {
    width: min(280px, calc(100vw - 40px));
    max-width: 100%;
    text-align: center;
  }
  .grid-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Background Image Poster */
.ob-bg-image {
  position: fixed;
  top: -5%; left: -5%; width: 110%; height: 110%;
  z-index: -3;
  background:
    radial-gradient(circle at 30% 24%, rgba(16, 185, 129, 0.16), transparent 34%),
    radial-gradient(circle at 76% 72%, rgba(251, 113, 133, 0.10), transparent 30%),
    linear-gradient(135deg, rgba(3, 7, 8, 0.96), rgba(3, 18, 13, 0.88));
  filter: blur(10px) brightness(0.82);
  transform: translateZ(0);
  will-change: transform, opacity;
  pointer-events: none;
}

/* ── Тактильный фидбек нажатия ──────────────────────────────────────────── */
.module-card:active { transform: translateY(-1px) scale(0.995); }
.grid-nav a:active { transform: scale(0.96); }
@media (prefers-reduced-motion: reduce) {
  .module-card:active, .grid-nav a:active { transform: none; }
}