body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    max-width: 900px;
    width: 100%;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 5px;
}

.subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 30px;
}

.main-content {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.camera-section, .info-section {
    flex: 1;
    min-width: 300px;
}

#webcam-container {
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.controls {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

#start-btn {
    background: #27ae60;
    color: white;
    flex: 2;
}

#start-btn:hover { background: #219150; }

#stop-btn {
    background: #e74c3c;
    color: white;
    flex: 1;
}

#stop-btn:disabled { background: #bdc3c7; cursor: not-allowed; }

#label-container {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2980b9;
    margin-bottom: 10px;
}

#status {
    padding: 10px;
    background: #ebf5fb;
    border-radius: 5px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.history-section h3 {
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 10px;
    margin-top: 20px;
}

#history-list {
    list-style: none;
    padding: 0;
    max-height: 200px;
    overflow-y: auto;
}

#history-list li {
    padding: 8px;
    border-bottom: 1px solid #f1f1f1;
    font-size: 0.9rem;
}