/* 404 — Not Found screen (NMU-CE & AIE) */

/* The layout wraps pages in .scroll-frame > .page-container (max 800px,
   centered). For the 404, break the container out to the full available
   width so the background fills edge-to-edge; the content itself stays
   centered via .nf-page. */
.page-container:has(> .nf-wrap) {
    min-height: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
}

.nf-wrap {
    position: relative;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
    padding: 40px 16px;
}

/* Plain left/right anchoring (no viewport-unit or transform tricks) so the
   washes always span the entire available width and fade vertically. */
.nf-wash {
    position: absolute;
    left: 0;
    right: 0;
    pointer-events: none;
}

.nf-wash-top {
    top: 0;
    height: 380px;
    background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 22%, transparent), transparent);
}

.nf-wash-bottom {
    bottom: 0;
    height: 300px;
    background: linear-gradient(0deg, color-mix(in srgb, #0ea5e9 15%, transparent), transparent);
}

/* Soft centered glow behind the content for depth. */
.nf-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(620px, 92vw);
    aspect-ratio: 1;
    background: radial-gradient(circle, color-mix(in srgb, var(--primary) 13%, transparent) 0%, transparent 65%);
    pointer-events: none;
}

.nf-page {
    position: relative;
    width: 100%;
    max-width: 600px;
    text-align: center;
    animation: nf-enter 0.55s ease both;
}

@keyframes nf-enter {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.nf-illus {
    width: 150px;
    height: 150px;
    margin: 0 auto 8px;
    animation: nf-float 4s ease-in-out infinite;
}

@keyframes nf-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.nf-code {
    margin: 0;
    font-size: clamp(72px, 18vw, 120px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--primary) 15%, #fb923c 85%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    filter: drop-shadow(0 12px 28px color-mix(in srgb, var(--primary) 30%, transparent));
}

.nf-title {
    margin: 10px 0 6px;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    text-wrap: balance;
}

.nf-sub {
    margin: 0 auto 6px;
    max-width: 420px;
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-secondary);
    text-wrap: balance;
}

.nf-path-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 10px 0 2px;
    font-size: 13px;
    color: var(--text-secondary);
}

.nf-path-label {
    white-space: nowrap;
}

.nf-path {
    display: inline-block;
    direction: ltr;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    color: var(--primary);
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    border: 1px dashed var(--primary);
    border-radius: 8px;
    padding: 2px 10px;
}

.nf-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 22px;
}

.nf-actions .btn-sky,
.nf-actions .btn-outlined {
    min-width: 150px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
}

.nf-links {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--border-color, rgba(148, 163, 184, 0.25));
    font-size: 14px;
    color: var(--text-secondary);
}

.nf-links-row {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.nf-chip {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-surface-hover);
    border: 1px solid var(--border-color, rgba(148, 163, 184, 0.25));
    border-radius: 999px;
    padding: 6px 16px;
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.nf-chip:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    color: var(--primary);
}

@media (prefers-reduced-motion: reduce) {
    .nf-page,
    .nf-illus {
        animation: none;
    }
}

@media (max-width: 480px) {
    .nf-wrap {
        padding: 32px 16px;
    }

    .nf-actions .btn-sky,
    .nf-actions .btn-outlined {
        flex: 1 1 100%;
    }
}