/* =============================================================
   notfound.css — Novemcore 404 state
   Calm, premium, useful. Paper editorial surface + one dark
   intelligence panel carrying a broken evidence-route visual.
   Scoped under .nf so it never touches the global shell.
   ============================================================= */

.nf {
  min-height: calc(100vh - 65px - 1px);
  display: flex; align-items: center;
  background:
    radial-gradient(120% 90% at 12% 8%, #FFFFFF 0%, rgba(255,255,255,0) 55%),
    var(--nc-paper);
}
.nf__wrap {
  width: 100%; max-width: 1180px; margin: 0 auto;
  padding: 72px 32px;
  display: grid; grid-template-columns: minmax(0,1.05fr) minmax(0,0.95fr);
  gap: 64px; align-items: center;
}

/* ---------- copy column ---------- */
.nf__copy { display: flex; flex-direction: column; align-items: flex-start; }
.nf__eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.28em;
  color: var(--nc-cobalt); text-transform: none;
  display: inline-flex; align-items: center; gap: 12px; margin-bottom: 22px;
}
.nf__eyebrow::before {
  content: ""; width: 30px; height: 1px; background: var(--nc-cobalt); opacity: 0.5;
}
.nf__h1 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(34px, 4.4vw, 52px); line-height: 1.06; letter-spacing: -0.004em;
  color: var(--nc-ink); margin: 0; text-wrap: balance; max-width: 14ch;
}
.nf__body {
  font-size: 17px; line-height: 1.6; color: var(--fg-2);
  margin: 20px 0 0; max-width: 46ch; text-wrap: pretty;
}

/* ---------- CTAs ---------- */
.nf__ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.nf-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 24px; border-radius: var(--r-md);
  font: 600 15.5px var(--font-body); text-decoration: none; cursor: pointer;
  transition: filter var(--dur-fast), background var(--dur-fast), transform 120ms, border-color var(--dur-fast);
  white-space: nowrap; border: 1px solid transparent;
}
.nf-btn .ar { transition: transform var(--dur-fast) var(--ease-standard); }
.nf-btn--primary { background: var(--nc-ink); color: var(--nc-paper); }
.nf-btn--primary:hover { filter: brightness(1.12); }
.nf-btn--primary:hover .ar { transform: translateX(3px); }
.nf-btn--primary:active { transform: translateY(1px); }
.nf-btn--secondary { background: transparent; color: var(--nc-ink); border-color: var(--border-strong); }
.nf-btn--secondary:hover { background: rgba(11,15,23,0.05); }
.nf-btn--secondary:active { transform: translateY(1px); }
.nf-btn:focus-visible { outline: 2px solid var(--nc-cobalt); outline-offset: 2px; }

/* ---------- quick links ---------- */
.nf__links { margin-top: 36px; width: 100%; max-width: 480px; }
.nf__linksLabel {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--fg-3); margin-bottom: 12px;
}
.nf__quick { display: flex; flex-wrap: wrap; gap: 9px; }
.nf__quick a {
  display: inline-flex; align-items: center; min-height: 40px;
  padding: 9px 18px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--border-strong);
  font: 400 14.5px var(--font-body); color: var(--fg-2); text-decoration: none;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.nf__quick a:hover { border-color: var(--nc-cobalt); color: var(--nc-ink); }
.nf__quick a:focus-visible { outline: 2px solid var(--nc-cobalt); outline-offset: 2px; }

/* ---------- evidence-route visual ---------- */
.nf__visual {
  position: relative; border-radius: var(--r-xl);
  background:
    radial-gradient(120% 120% at 78% 18%, rgba(30,58,138,0.30) 0%, rgba(30,58,138,0) 55%),
    linear-gradient(160deg, var(--nc-slate) 0%, var(--nc-void) 100%);
  border: 1px solid var(--d-border-soft);
  box-shadow: var(--shadow-pop);
  padding: 30px; overflow: hidden; aspect-ratio: 1 / 0.82;
}
.nf__visual::after { /* faint top sheen */
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255,245,234,0.06); pointer-events: none;
}
.nf__visualTag {
  position: absolute; left: 24px; top: 22px; z-index: 2;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--d-fg-3);
  display: inline-flex; align-items: center; gap: 8px;
}
.nf__visualTag .led {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--nc-signal-cyan); box-shadow: 0 0 0 3px rgba(0,194,209,0.18);
}
.nf__svg { display: block; width: 100%; height: 100%; }

/* svg motion (subtle, reduced-motion aware) */
.nf-flow { stroke-dasharray: 5 7; animation: nf-dash 9s linear infinite; }
@keyframes nf-dash { to { stroke-dashoffset: -120; } }
.nf-pulse { transform-box: fill-box; transform-origin: center; animation: nf-breathe 4.5s var(--ease-standard) infinite; }
@keyframes nf-breathe { 0%,100% { opacity: 0.35; r: 9px; } 50% { opacity: 0.08; r: 17px; } }

@media (prefers-reduced-motion: reduce) {
  .nf-flow, .nf-pulse { animation: none !important; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .nf { min-height: 0; }
  .nf__wrap { grid-template-columns: 1fr; gap: 40px; padding: 56px 28px 64px; }
  .nf__copy { order: 1; }
  .nf__visual { order: 2; aspect-ratio: 16 / 11; max-width: 520px; }
}
@media (max-width: 560px) {
  .nf__wrap { padding: 40px 20px 52px; gap: 32px; }
  .nf__h1 { font-size: 32px; }
  .nf__body { font-size: 16px; }
  .nf__ctas { flex-direction: column; align-items: stretch; width: 100%; }
  .nf-btn { width: 100%; height: 52px; }
  .nf__links { margin-top: 28px; }
  .nf__quick { flex-direction: row; }
  /* trim visual detail on small screens */
  .nf__visual { padding: 20px; }
  .nf-detail { display: none; }
}