/* Loading Overlay & Spinner */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.spinner-container {
    text-align: center;
}

.main-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

.loading-text {
    color: #fff;
    font-family: sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    animation: pulse 1.5s ease-in-out infinite;
}

.loader-hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

/* Scan Window */
.scan-window {
    position: relative;
    width: 280px;
    height: 180px;
    margin: 0 auto;
    border: 2px solid #00d2ff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.4);
}

#scan-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(1) brightness(0.6);
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, transparent, #00d2ff, transparent);
    box-shadow: 0 0 15px #00d2ff;
    animation: scanMove 2.5s infinite ease-in-out;
}

@keyframes scanMove {
    0% {
        top: 0%;
    }

    50% {
        top: 100%;
    }

    100% {
        top: 0%;
    }
}

/* Loading Progress */
#loading-progress {
    transition: width 0.8s ease-out;
}

/* Fact Box */
.fact-box {
    min-width: 280px;
}

#fact-text {
    transition: opacity 0.5s ease-in-out;
    min-height: 3em;
    display: block;
}

/* Button States */
.btn-prediction:disabled {
    cursor: not-allowed;
    filter: grayscale(0.2);
    transition: all 0.3s ease;
}