/* Reset default styles for all elements */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root variables for color scheme to provide easy customization */
:root {
    --white: #fff;
    --black: #000;
    --light-gray: #dfdfe2;
    --dark-blue: #0a0a23;
    --light-blue: #99c9ff;
}

body {
    background-color: var(--dark-blue);
    color: var(--light-gray);
}

main {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 20px;
    min-height: 100vh;
    text-align: center;
}

h1 {
    font-size: xx-large;
}

.input-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: 15px 0;
    gap: 10px;
}

label {
    font-size: large;
}

.cash-input {
    height: 30px;
    padding: 10px;
    font-size: larger;
}

#purchase-btn {
    cursor: pointer;
    width: 100px;
    height: 30px;
    margin: 10px 0;
    color: var(--dark-blue);
    background-color: #feac32;
    background-image: linear-gradient(#fecc4c, #ffac33);
    border-color: #feac32;
    border-width: 3px;
}

.register-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.top-display-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#price-screen {
    background-color: var(--black);
    height: 50px;
    width: 200px;
    color: var(--white);
    font-size: 1.2rem;
    border: 10px solid var(--light-blue);
    display: flex;
    justify-content: center;
    align-items: center;
}

.connector {
    background-color: var(--light-blue);
    height: 30px;
    width: 40px;
}

.register {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    border-radius: 35px 35px 0 0;
    padding-top: 20px;
    background-color: var(--light-blue);
    height: 250px;
    width: 325px;
}

.buttons-container {
    width: 25%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    align-content: flex-start;
    gap: 5px;
}

.register-btn {
    border-radius: 10%;
    border: none;
    width: 20px;
    height: 20px;
    background-color: var(--black);
}

#cash-drawer-display {
    background-color: var(--white);
    width: 55%;
    height: 95%;
    color: var(--black);
    padding: 10px;
}

.bottom-register {
    background-color: var(--light-blue);
    height: 50px;
    width: 325px;
    margin-top: 10px;
}

.circle {
    margin: 15px auto;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    background-color: var(--black);
}