:root {
    --primary-color: #457b9d;
    --secondary-color: #a8dadc;
    --dark-color: #1d3557;
    --light-color: #f1faee;
    --delete-color: #e63946;
    --read-color: #058c42;
    --radius-measure: 5px
}

/* Resets */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* General */
body {
    background-color: var(--light-color);
    display: grid;
    place-items: start;
    font-size: 1.5em;
}

button,
input {
    border-radius: var(--radius-measure);
}

button:hover {
    cursor: pointer;
}


.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, 300px);
    grid-auto-rows: 300px;
    width: 100vw;
    gap: 1rem;
    padding: 1rem;
}

.book-card {
    display: flex;
    flex-direction: column;
    color: White;
    background-color: var(--dark-color);
    padding: 5px;
    position: relative;
    min-width: 300px;
}

.book-title {
    font-size: 2rem;
}

.book-card p {
    margin: 1rem;
}

.book-card button {
    position: absolute;
    bottom: 1em;
    width: 130px;
    height: 50px;
    color: var(--light-color);
    display: flex;
    flex-direction: row-reverse;
    justify-content: space-evenly;
    align-items: center;
    padding: 1em;
    text-align: center;
}

.card button img {
    width: 2em;
}

.delete-button {
    position: relative;
    left: 1rem;
    background-color: var(--delete-color);
}

.read-button {
    position: relative;
    right: 1rem;
    background-color: var(--read-color);
}

.add-button {
    position: fixed;
    bottom: 3rem;
    right: 5rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--light-color);
    border: none;
}


form {
    background-color: var(--secondary-color);
    height: 500px;
    width: 500px;
    place-self: center;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 4rem 4rem 0 4rem;
    position: relative;
}

form p {
    display: flex;
    justify-content: space-between;
}

form button {
    padding: 1rem;
    width: 100px;
    align-self: center;
    background-color: var(--light-color);
}

form .cancel-button {
    width: 50px;
    height: 50px;
    position: absolute;
    top: 5px;
    right: 5px;
}

form input:invalid {
    border: 2px solid var(--delete-color);
}

form input:valid {
    border: 2px solid var(--read-color);
}

form input:focus-visible {
    outline: none
}

form:valid button[type="submit"] {
    background-color: var(--read-color);
    color: var(--light-color);
}

form:invalid button[type="submit"] {
    cursor: not-allowed;
}


.blur {
    display: grid;
    position: absolute;
    z-index: 1;
    width: 100vw;
    height: 100vh;
    background: #f1faee06;
    backdrop-filter: blur(5px);
}

.clickable {
    cursor: pointer;

}

.card {
    border-radius: var(--radius-measure);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);

}

.clickable:hover {
    transform: scale(1.1);
    transition: 0.2s ease;
}

.read {
    background-color: var(--secondary-color);
    color: Black;
}

.done-icon {
    width: 30px;
    align-self: end;

}

.hidden {
    visibility: hidden;

}