body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}

input[type="text"], textarea, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    box-sizing: border-box;
}

select {
    background-image: linear-gradient(45deg, transparent 50%, #666 50%), linear-gradient(135deg, #666 50%, transparent 50%);
    background-position: calc(100% - 20px) calc(1em + 2px), calc(100% - 15px) calc(1em + 2px);
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    padding-right: 30px;
    cursor: pointer;
}

select:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

optgroup {
    font-weight: bold;
    color: #333;
    background-color: #f8f9fa;
}

optgroup option {
    padding-left: 20px;
    color: #555;
}

textarea {
    height: 100px;
    resize: vertical;
}

.slide-input {
    border: 1px solid #e0e0e0;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
    background-color: #fafafa;
}

.slide-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.slide-number {
    font-weight: bold;
    color: #007bff;
}

.remove-slide {
    background: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 3px;
    cursor: pointer;
}

.remove-slide:hover {
    background: #c82333;
}

button {
    background-color: #007bff;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    margin-top: 20px;
}

button:hover {
    background-color: #0056b3;
}

.add-slide-btn {
    background-color: #28a745;
    margin-top: 10px;
}

.add-slide-btn:hover {
    background-color: #218838;
}

.loading {
    display: none;
    text-align: center;
    color: #666;
    margin-top: 20px;
}

.result {
    margin-top: 20px;
    padding: 15px;
    border-radius: 5px;
    display: none;
}

.success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.debug-info {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    color: #495057;
    margin-top: 10px;
    padding: 10px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 12px;
    white-space: pre-wrap;
    max-height: 200px;
    overflow-y: auto;
}

/* Spinner Animation */
.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #007bff;
    margin: 20px auto;
    animation: spin 1s ease infinite;
}

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

#loading-message {
    font-weight: bold;
    color: #333;
}