body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 2rem 0;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 600px;
}

h1 {
    color: #2c3e50;
    font-size: 1.5rem;
}

p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Drag and Drop Area */
.drop-area {
    border: 2px dashed #bdc3c7;
    border-radius: 8px;
    padding: 3rem 1rem;
    margin-top: 1rem;
    background-color: #fcfcfc;
    transition: background-color 0.3s, border-color 0.3s;
    cursor: pointer;
}

.drop-area.active {
    background-color: #e8f4fd;
    border-color: #3498db;
}

/* Canvas and Selection UI */
.canvas-container {
    position: relative;
    display: inline-block;
    max-width: 100%;
    margin-top: 1rem;
    cursor: crosshair;
}

#image-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

#selection-box {
    position: absolute;
    border: 2px solid #3498db;
    background-color: rgba(52, 152, 219, 0.2);
    display: none;
    pointer-events: none; /* 드래그 중 박스가 마우스 이벤트를 가로막지 않도록 */
}

#btn-analyze {
    display: block;
    margin: 20px auto;
    background-color: #27ae60;
}
#btn-analyze:hover {
    background-color: #2ecc71;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    margin-top: 10px;
}

button:hover {
    background-color: #2980b9;
}

/* Loading Spinner */
#loading {
    margin-top: 2rem;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #3498db;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Results Area */
#results-area {
    margin-top: 2rem;
    text-align: left;
}

.ewg-group {
    margin-bottom: 1.5rem;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.ewg-group h3 {
    margin-top: 0;
    font-size: 1.2rem;
    border-bottom: 2px solid rgba(0,0,0,0.1);
    padding-bottom: 0.5rem;
}

.ewg-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
}
.ewg-item:last-child {
    border-bottom: none;
}
.ewg-item span.score {
    font-weight: bold;
}

/* EWG Colors */
.group-green {
    background-color: #eaffea;
    border-left: 5px solid #2ecc71;
}
.group-green h3 { color: #27ae60; }
.group-green .score { color: #27ae60; }

.group-yellow {
    background-color: #fffbea;
    border-left: 5px solid #f1c40f;
}
.group-yellow h3 { color: #f39c12; }
.group-yellow .score { color: #f39c12; }

.group-red {
    background-color: #ffeaea;
    border-left: 5px solid #e74c3c;
}
.group-red h3 { color: #c0392b; }
.group-red .score { color: #c0392b; }

.group-unknown {
    background-color: #f4f4f4;
    border-left: 5px solid #95a5a6;
}
.group-unknown h3 { color: #7f8c8d; }
.group-unknown .score { color: #7f8c8d; }