.as-404 {
  min-height: 100vh;
  background: var(--as-dark);
  color: var(--as-text-on-dark);
  display: flex;
  flex-direction: column;
}

.as-404__topbar {
  padding: 18px 32px;
  border-bottom: 1px solid var(--as-dark-divider);
  display: flex;
  align-items: center;
  gap: 28px;
  flex: none;
}
.as-404__logo { display: flex; align-items: center; gap: 2px; font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.as-404__logo-amp { background: var(--as-accent); color: var(--as-dark); padding: 0 7px; margin: 0 4px; border-radius: 6px; font-weight: 800; }
.as-404__cart { margin-left: auto; font-size: 14px; color: var(--as-text-on-dark); }

.as-404__body {
  flex: 1;
  padding: 64px 32px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
  background-image:
    radial-gradient(620px 420px at 22% 42%, rgba(255, 108, 67, 0.14), rgba(255, 108, 67, 0) 70%),
    repeating-linear-gradient(135deg, rgba(242, 236, 227, 0.035) 0 1px, rgba(0, 0, 0, 0) 1px 14px);
}
@media (max-width: 900px) {
  .as-404__body { grid-template-columns: 1fr; padding: 40px 20px; gap: 40px; }
}

.as-404__left { display: flex; flex-direction: column; gap: 18px; }
.as-404__mark { display: flex; align-items: center; gap: 6px; padding-bottom: 6px; }
.as-404__mark span:not(.as-404__mark-amp) { font-size: 132px; font-weight: 800; line-height: 0.82; letter-spacing: -0.06em; color: var(--as-text-on-dark); }
.as-404__mark-amp {
  width: 104px;
  height: 104px;
  border-radius: 20px;
  background: var(--as-accent);
  color: var(--as-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 86px;
  font-weight: 800;
  line-height: 1;
  flex: none;
}
@media (max-width: 700px) {
  .as-404__mark span:not(.as-404__mark-amp) { font-size: 76px; }
  .as-404__mark-amp { width: 60px; height: 60px; font-size: 48px; border-radius: 14px; }
}

.as-404__kicker { font-family: var(--as-font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--as-accent); }
.as-404__title { font-size: 44px; font-weight: 700; line-height: 1.06; letter-spacing: -0.03em; }
@media (max-width: 700px) { .as-404__title { font-size: 30px; } }
.as-404__desc { font-size: 17px; line-height: 1.7; color: var(--as-text-on-dark-tertiary); max-width: 52ch; }

.as-404__search {
  display: flex;
  border: 1.5px solid var(--as-dark-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--as-dark-field);
  max-width: 460px;
  margin-top: 6px;
}
.as-404__search input {
  flex: 1;
  border: 0;
  outline: none;
  padding: 14px 16px;
  font-family: var(--as-font-body);
  font-size: 15px;
  color: var(--as-text-on-dark);
  background: var(--as-dark-field);
}
.as-404__search input::placeholder { color: var(--as-text-on-dark-secondary); }
.as-404__search button {
  min-height: var(--as-tap-min);
  box-sizing: border-box;
  border: 0;
  background: var(--as-accent);
  color: var(--as-dark);
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 700;
}

.as-404__actions { display: flex; gap: 12px; padding-top: 6px; flex-wrap: wrap; }
.as-404__actions a {
  border: 1.5px solid var(--as-dark-border-strong);
  color: var(--as-text-on-dark);
  padding: 14px 24px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 600;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.as-404__actions a:hover { background: var(--as-dark-panel); border-color: var(--as-accent); }

.as-404__right { display: flex; flex-direction: column; gap: 14px; }
.as-404__right-title { font-size: 16px; font-weight: 700; }
.as-404__catlist { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 500px) { .as-404__catlist { grid-template-columns: 1fr; } }
.as-404__catlist a {
  border: 1px solid var(--as-dark-divider);
  background: var(--as-dark-panel);
  color: #e6dfd4;
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.as-404__catlist a:hover { border-color: var(--as-accent); transform: translateY(-2px); }
.as-404__catlist a span:first-child { flex: 1; }
.as-404__catlist-count { font-size: 12.5px; color: var(--as-text-on-dark-secondary); }