body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f0f2f5;
    color: #333;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

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

.subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-top: 0;
    margin-bottom: 30px;
}

.scanner-section {
    margin: 30px 0;
    text-align: center;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.scanner-controls {
    margin-top: 15px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 25px;
    margin: 0 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
}

button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
    transform: none;
}

#stop-scanner {
    background-color: #e74c3c;
}

#stop-scanner:hover {
    background-color: #c0392b;
}

.result-section {
    margin-top: 40px;
    animation: fadeIn 0.5s ease-in-out;
}

.student-card {
    display: flex;
    border: 1px solid #dfe6e9;
    border-radius: 10px;
    padding: 25px;
    background-color: #f8f9fa;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.photo-container {
    width: 180px;
    height: 240px;
    margin-right: 30px;
    border: 1px solid #bdc3c7;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    overflow: hidden;
}

#student-photo {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.student-info {
    flex: 1;
    font-size: 16px;
}

.student-info p {
    margin: 12px 0;
    padding-bottom: 8px;
    border-bottom: 1px dashed #ecf0f1;
}

.student-info strong {
    color: #2c3e50;
    min-width: 80px;
    display: inline-block;
}

#qr-reader {
    margin: 0 auto;
    border: 2px dashed #bdc3c7;
    border-radius: 8px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive design */
@media (max-width: 768px) {
    .student-card {
        flex-direction: column;
    }
    
    .photo-container {
        width: 100%;
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    #qr-reader {
        width: 100% !important;
    }
}