body {
    background-color: #f8f9fa;
}

.thumbnail-container {
    margin-bottom: 20px;
}

#imageCanvas {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

.color-info {
    position: absolute;
    background: rgba(0, 0, 0, 0.95);
    color: white;
    padding: 12px;
    border-radius: 6px;
    font-size: 14px;
    pointer-events: none;
    z-index: 1000;
    min-width: 280px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.color-swatch {
    width: 100%;
    height: 30px;
    border: 2px solid white;
    border-radius: 4px;
    margin-bottom: 8px;
}

.color-values {
    font-family: 'Courier New', monospace;
}

.channel-bar {
    display: flex;
    align-items: center;
    margin: 4px 0;
    gap: 8px;
}

.channel-bar strong {
    width: 14px;
    text-align: right;
    font-size: 13px;
    font-weight: bold;
}

.bar-container {
    flex: 1;
    height: 14px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    transition: width 0.1s ease;
}

.bar-cyan { background: #00FFFF; }
.bar-magenta { background: #FF00FF; }
.bar-yellow { background: #FFFF00; }
.bar-black { background: #000000; border: 1px solid rgba(255,255,255,0.3); }
.bar-orange { background: #FF8800; }
.bar-green { background: #00FF00; }
.bar-violet { background: #8800FF; }

.channel-bar .value {
    width: 40px;
    text-align: right;
    font-size: 13px;
    font-weight: 600;
}

.card {
    border: none;
}

.card-header {
    border-bottom: 3px solid rgba(255, 255, 255, 0.2);
}

.btn-lg {
    padding: 12px 24px;
    font-size: 18px;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    margin-right: 8px;
}