body {
    background: #fff;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.contenedor-form {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    width: 100%;
}

.layout-grid {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: space-between;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.contenedor-tabla {
    background: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
    max-width: 650px;
    width: 100%;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 2em;
    font-weight: bold;
}

.campo {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

select, input[type="date"], input[type="text"], input[type="number"], input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

select:focus, input[type="date"]:focus, input[type="text"]:focus, input[type="number"]:focus, input[type="file"]:focus {
    border-color: #667eea;
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
    outline: none;
}

input[readonly] {
    background-color: #f5f5f5;
    color: #666;
    cursor: not-allowed;
}

.input-dinero {
    position: relative;
}

.input-dinero input {
    padding-left: 30px;
}

.input-dinero::before {
    content: '$';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
    font-weight: bold;
}

.gastos-table {
    width: 100%;
    border-collapse: collapse;
}