:root {
    --bg-main: #0a0a0f;          /* Deep dark center color */
    --bg-darker: #050508;        /* Even darker shade for header/footer */
    --mobius-blue: #00d2ff;      /* Vibrant neon blue energy */
    --mobius-red: #ff0055;       /* Vibrant neon red/magenta energy */
    --text-muted: #a0a0b8;
}

body {
    background-color: var(--bg-main);
    color: #ffffff;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-image: radial-gradient(circle at center, #0e0e16 0%, #050508 100%);
}

.bg-dark-custom {
    background-color: var(--bg-darker);
    border-bottom: 2px solid;
    border-image: linear-gradient(to right, var(--mobius-blue), var(--mobius-red)) 1;
}

.brand-logo {
    font-size: 1.6rem;
    letter-spacing: 2px;
    background: linear-gradient(45deg, var(--mobius-red), var(--mobius-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 15px rgba(255, 0, 85, 0.3);
}

.nav-tabs-custom .nav-link {
    color: var(--text-muted);
    border: none;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-tabs-custom .nav-link:hover {
    color: var(--mobius-blue);
}

.nav-tabs-custom .nav-link.active {
    color: #ffffff !important;
    background-color: transparent !important;
    border-bottom: 2px solid var(--mobius-blue) !important;
    text-shadow: 0 0 8px var(--mobius-blue);
}

.content-card {
    background: rgba(15, 15, 25, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

.text-muted-custom {
    color: var(--text-muted);
}

.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.2), transparent);
    border: none;
}

.btn-mobius-primary {
    background: linear-gradient(135deg, var(--mobius-red), #990033);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 0, 85, 0.3);
}

.btn-mobius-primary:hover {
    background: linear-gradient(135deg, #ff2a75, var(--mobius-red));
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 0, 85, 0.5);
    transform: translateY(-2px);
}

.footer {
    border-top: 2px solid;
    border-image: linear-gradient(to right, var(--mobius-red), var(--mobius-blue)) 1;
}

.footer-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 800px;
}


.card-gallery-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.gallery-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}
.gallery-controls input, .gallery-controls select {
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.gallery-controls input { flex-grow: 1; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.card-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
}

.card-item:hover img {
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

@media (min-width: 992px) {
    .card-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}