/* ==========================================================
   АВТО108 v4 · Страница 404
   "Свет не нашёл эту страницу" — большая цифра 404, где
   средний "0" заменён реальной анимированной фарой:
   мерцающий filament, луч с пылью, метал шеллом.
   Палитра/токены — из css/design.css (--accent / --ink-*).
   ========================================================== */

/* ---------- Hero (full-bleed, бренд-градиент) ---------- */
.v4-404 {
  background: linear-gradient(180deg, var(--accent-soft) 0%, #fff 65%);
  position: relative; overflow: hidden;
  /* full-bleed: вытаскиваем за пределы .container */
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0;
  border-bottom: 1px solid var(--line);
}

.v4-404-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid; grid-template-columns: 1fr 560px;
  gap: 48px; align-items: center;
}

/* ---------- Текстовый блок ---------- */
.v4-404-eyebrow {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); letter-spacing: 0.18em;
  text-transform: uppercase; margin-bottom: 18px;
  display: flex; align-items: center; gap: 10px;
}
.v4-404-eyebrow::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: #ff5c5c; box-shadow: 0 0 12px #ff5c5c;
  animation: v4404blink 1.2s ease-in-out infinite;
}
@keyframes v4404blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.2; }
}

.v4-404-h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 800; line-height: 1.05; letter-spacing: -0.03em;
  color: var(--ink-900); margin: 0 0 18px;
  text-wrap: balance;
}
.v4-404-h1 em { font-style: normal; color: var(--accent); }

.v4-404-lead {
  font-size: 16px; color: var(--ink-600); line-height: 1.55;
  margin: 0 0 28px; max-width: 540px;
}

.v4-404-cta { display: flex; flex-wrap: wrap; gap: 10px; }
.v4-404-cta .btn { min-width: 160px; }

/* ---------- Анимация: «404» с фарой ---------- */
.v4-404-art {
  position: relative;
  display: flex; justify-content: center; align-items: center;
  min-height: 360px;
}
.v4-404-svg {
  width: 100%; max-width: 560px; height: auto;
  display: block;
}

/* Filament glow — пульсация бракованной галогенки */
.v4-404-bulb {
  transform-box: fill-box;
  transform-origin: center;
  animation: v4404pulse 1.8s ease-in-out infinite;
  filter: blur(2.5px);
}
@keyframes v4404pulse {
  0%, 100% { opacity: 1;    transform: scale(1);    }
  18%      { opacity: 0.25; transform: scale(0.9);  }
  22%      { opacity: 0.95; transform: scale(1.05); }
  36%      { opacity: 0.5;  transform: scale(0.96); }
  58%      { opacity: 1;    transform: scale(1.03); }
  78%      { opacity: 0.3;  transform: scale(0.94); }
}

.v4-404-bulb-core {
  transform-box: fill-box;
  transform-origin: center;
  animation: v4404flicker 1.8s ease-in-out infinite;
}
@keyframes v4404flicker {
  0%, 100% { opacity: 1; }
  18%      { opacity: 0.15; }
  36%      { opacity: 0.55; }
  58%      { opacity: 1; }
  78%      { opacity: 0.25; }
}

/* Луч света — мерцает в такт с filament */
.v4-404-beam-grp {
  transform-box: fill-box;
  transform-origin: 50% 0%;
  animation: v4404beam 1.8s ease-in-out infinite;
}
@keyframes v4404beam {
  0%, 100% { opacity: 0.85; }
  18%      { opacity: 0.18; }
  36%      { opacity: 0.7;  }
  58%      { opacity: 0.95; }
  78%      { opacity: 0.22; }
}

/* Пылинки внутри луча — медленно сносит вниз/вбок */
.v4-404-dust circle {
  fill: #fff;
  opacity: 0;
  animation: v4404dust 5.2s linear infinite;
}
.v4-404-dust circle:nth-child(1) { animation-delay:  0.0s; }
.v4-404-dust circle:nth-child(2) { animation-delay: -0.9s; }
.v4-404-dust circle:nth-child(3) { animation-delay: -1.8s; }
.v4-404-dust circle:nth-child(4) { animation-delay: -2.6s; }
.v4-404-dust circle:nth-child(5) { animation-delay: -3.5s; }
.v4-404-dust circle:nth-child(6) { animation-delay: -4.3s; }
@keyframes v4404dust {
  0%   { transform: translate(0, -40px); opacity: 0;    }
  15%  {                                  opacity: 0.75; }
  85%  {                                  opacity: 0.5;  }
  100% { transform: translate(10px, 220px); opacity: 0;  }
}

/* "Глитч" сканлайн — тонкая яркая линия идёт сверху вниз по лучу */
.v4-404-scan {
  animation: v4404scan 3.6s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
@keyframes v4404scan {
  0%   { transform: translateY(-30px); opacity: 0;   }
  10%  {                               opacity: 0.7; }
  90%  {                               opacity: 0.5; }
  100% { transform: translateY(220px); opacity: 0;   }
}

/* Цифры "4" — лёгкое "дыхание" в такт мерцанию */
.v4-404-digit {
  transform-box: fill-box;
  transform-origin: center;
  animation: v4404digit 1.8s ease-in-out infinite;
}
@keyframes v4404digit {
  0%, 100% { filter: brightness(1);    }
  18%      { filter: brightness(0.55); }
  36%      { filter: brightness(0.85); }
  58%      { filter: brightness(1.05); }
  78%      { filter: brightness(0.6);  }
}

/* ---------- Suggest-блок (плитки направлений) ---------- */
.v4-404-suggest {
  max-width: 1280px; margin: 0 auto;
  padding: 24px 24px 64px;
}
.v4-404-suggest-eyebrow {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-500); letter-spacing: 0.16em;
  text-transform: uppercase; margin-bottom: 14px;
}
.v4-404-tiles {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.v4-404-tile {
  display: flex; align-items: center; gap: 14px;
  padding: 18px; background: #fff;
  border: 1px solid var(--line); border-radius: 12px;
  text-decoration: none; color: inherit;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.v4-404-tile:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 20px rgba(11,15,20,0.06);
  transform: translateY(-2px);
}
.v4-404-tile-ico {
  width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent-ink);
  display: grid; place-items: center;
}
.v4-404-tile b {
  display: block; font-size: 13.5px; font-weight: 700;
  color: var(--ink-900); margin-bottom: 3px;
  letter-spacing: -0.005em;
}
.v4-404-tile small {
  font-size: 11.5px; color: var(--ink-500);
  font-family: var(--font-mono); letter-spacing: 0.03em;
  display: block; line-height: 1.35;
}

/* ---------- Адаптив ---------- */
@media (max-width: 980px) {
  .v4-404-inner {
    grid-template-columns: 1fr;
    gap: 24px; padding: 32px 16px 28px;
  }
  .v4-404-art { min-height: 280px; }
  .v4-404-tiles { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .v4-404-h1   { font-size: 30px; }
  .v4-404-lead { font-size: 14.5px; }
  .v4-404-cta .btn { flex: 1 1 calc(50% - 5px); min-width: 140px; }
  .v4-404-tiles    { grid-template-columns: 1fr; }
  .v4-404-suggest  { padding: 18px 16px 56px; }
}

/* ---------- Уважение к prefers-reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .v4-404-bulb,
  .v4-404-bulb-core,
  .v4-404-beam-grp,
  .v4-404-dust circle,
  .v4-404-scan,
  .v4-404-digit,
  .v4-404-eyebrow::before {
    animation: none !important;
  }
}