body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
}

#map {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.panel {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 300px;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

h1 {
    margin-top: 0;
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 20px;
}

.control-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: #555;
    font-weight: 500;
}

input[type="number"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1rem;
}

button, .btn-primary {
    display: inline-block;
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    text-align: center;
    box-sizing: border-box;
    transition: background-color 0.2s;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-action {
    background-color: #28a745;
    color: white;
    font-weight: 600;
}

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

.btn-secondary {
    background-color: #6c757d;
    color: white;
    margin-bottom: 10px;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-secondary:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#fileName {
    display: block;
    margin-top: 5px;
    font-size: 0.8rem;
    color: #777;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

hr {
    border: 0;
    border-top: 1px solid #eee;
    margin: 20px 0;
}