/* ======================================================
   404 Page — Dedicated Stylesheet v1.2
   Uses theme CSS variables — dark / light mode compatible.
   ====================================================== */

/* ── Layout ──────────────────────────────────────────── */
.bfai-404-page {
    display: flex;
    align-items: center;
    min-height: calc(100vh - 140px);
    padding: var(--space-12) 0 var(--space-20);
}

.bfai-404-inner {
    text-align: center;
    max-width: 820px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* ── Animated Graphic ────────────────────────────────── */
.bfai-404-graphic {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-8);
}

.bfai-404-glow {
    position: absolute;
    inset: -50px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.22) 0%, transparent 65%);
    border-radius: 50%;
    animation: bfai404GlowPulse 3.5s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes bfai404GlowPulse {
    0%, 100% { transform: scale(1);    opacity: 0.5; }
    50%       { transform: scale(1.2); opacity: 1;   }
}

.bfai-404-code {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    position: relative;
    z-index: 1;
}

.bfai-404-num {
    font-size: clamp(5.5rem, 14vw, 9.5rem);
    font-weight: 900;
    line-height: 1;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.04em;
    user-select: none;
}

.bfai-404-orbit {
    position: relative;
    width: clamp(70px, 12vw, 112px);
    height: clamp(70px, 12vw, 112px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.bfai-404-orbit svg:first-child {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: bfai404Spin 10s linear infinite;
    filter: drop-shadow(0 0 16px rgba(168, 85, 247, 0.55));
}

.bfai-404-orbit-icon {
    position: relative;
    z-index: 1;
    color: var(--brand-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes bfai404Spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* ── Badge ───────────────────────────────────────────── */
.bfai-404-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 6px 18px;
    background: rgba(168, 85, 247, 0.1);
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: var(--weight-bold);
    color: var(--brand-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-5);
}

/* ── Headings ────────────────────────────────────────── */
.bfai-404-title {
    font-size: clamp(1.6rem, 4.5vw, 2.6rem);
    font-weight: var(--weight-bold);
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.bfai-404-gradient {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bfai-404-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 520px;
    margin: 0 auto var(--space-8);
}

/* ── PRIMARY + SECONDARY BUTTONS ─────────────────────── */
.bfai-404-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-10);
}

.bfai-404-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 10px;
    font-size: 0.9375rem;          /* 15px */
    font-weight: var(--weight-semibold);
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    border: none;
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
    position: relative;
    overflow: hidden;
}

/* Shimmer effect on hover for primary */
.bfai-404-btn--primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.15) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 400ms ease;
}
.bfai-404-btn--primary:hover::after {
    transform: translateX(100%);
}

.bfai-404-btn--primary {
    background: var(--brand-gradient);
    color: #fff !important;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.12) inset,
        0 4px 20px rgba(168, 85, 247, 0.35);
}

.bfai-404-btn--primary:hover {
    transform: translateY(-2px);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.12) inset,
        0 8px 28px rgba(168, 85, 247, 0.5);
}

.bfai-404-btn--primary:active {
    transform: translateY(0);
}

.bfai-404-btn--secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-default, rgba(255,255,255,0.15));
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

.bfai-404-btn--secondary:hover {
    background: var(--glass-bg);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(168, 85, 247, 0.18);
}

.bfai-404-btn--secondary:active {
    transform: translateY(0);
}

/* ── SUGGESTION CARD ─────────────────────────────────── */
.bfai-404-suggestions {
    padding: 28px 24px 24px;
    background: var(--glass-bg);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.bfai-404-suggest-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 11px;
    font-weight: var(--weight-bold);
    color: var(--text-muted);
    margin-bottom: var(--space-5);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.bfai-404-suggest-label svg {
    color: var(--brand-primary);
    flex-shrink: 0;
}

.bfai-404-suggest-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

/* Suggestion chip — clean pill style */
.bfai-404-suggest-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    background: var(--bg-surface, rgba(255,255,255,0.04));
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 0.8125rem;         /* 13px */
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 160ms ease;
    white-space: nowrap;
}

.bfai-404-suggest-links a svg {
    color: var(--brand-primary);
    flex-shrink: 0;
    opacity: 0.85;
}

.bfai-404-suggest-links a:hover {
    background: rgba(168, 85, 247, 0.08);
    border-color: rgba(168, 85, 247, 0.4);
    color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.15);
}

.bfai-404-suggest-links a:active {
    transform: translateY(0);
}

/* ── LIGHT MODE ──────────────────────────────────────── */
[data-theme="light"] .bfai-404-glow {
    background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 65%);
}

[data-theme="light"] .bfai-404-btn--secondary {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.14);
    color: #1e293b;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

[data-theme="light"] .bfai-404-btn--secondary:hover {
    background: #faf5ff;
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

[data-theme="light"] .bfai-404-suggestions {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.08);
    backdrop-filter: none;
}

[data-theme="light"] .bfai-404-suggest-links a {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.09);
    color: #475569;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

[data-theme="light"] .bfai-404-suggest-links a:hover {
    background: #faf5ff;
    border-color: rgba(168, 85, 247, 0.4);
    color: var(--brand-primary);
}

/* ── RESPONSIVE ──────────────────────────────────────── */
@media ( max-width: 640px ) {
    .bfai-404-page {
        padding: var(--space-8) 0 var(--space-14);
        min-height: auto;
    }

    /* Stack buttons vertically on mobile */
    .bfai-404-actions {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-3);
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }

    .bfai-404-btn {
        width: 100%;
        padding: 15px 20px;
        font-size: 1rem;
    }

    .bfai-404-suggestions {
        padding: 20px 16px;
        border-radius: 12px;
    }

    /* Wrap suggestion chips evenly */
    .bfai-404-suggest-links {
        gap: 8px;
    }

    .bfai-404-suggest-links a {
        flex: 1 1 calc(50% - 8px);
        justify-content: center;
        padding: 10px 12px;
    }
}

@media ( max-width: 380px ) {
    .bfai-404-suggest-links a {
        flex: 1 1 100%;
    }
}