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

:root {
    /* Primary Colors */
    --desaturated-red: hsl(0, 36%, 70%);
    --soft-red: hsl(0, 93%, 68%);

    /* Neutral Colors */
    --dark-grayish-red: hsl(0, 6%, 24%);

    /* Gradients */
    --gradient-color1: hsl(0, 80%, 86%);
    --gradient-color2: hsl(0, 74%, 74%);
    /* - Linear, 135deg, from hsl(0, 0%, 100%), to hsl(0, 100%, 98%) */
    /* - Linear, 135deg, from hsl(0, 80%, 86%), to hsl(0, 74%, 74%) */

    /* - Weights: 300, 400, 600 */
}

::selection {
    color: hsl(0, 0%, 100%);
    background-color: var(--gradient-color2);
}

body {
    font-size: 16px;
    font-family: "Josefin Sans", sans-serif;
}

.parent {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 0.5rem;
}

.div1 {
    grid-column: span 2 / span 2;
}

.div2 {
    grid-column: span 2 / span 2;
    grid-row: span 4 / span 4;
    grid-column-start: 3;
}

.div3 {
    grid-column: span 2 / span 2;
    grid-row: span 3 / span 3;
    grid-row-start: 2;
}


.div1 img {
    width: 13rem;
    padding: 2.5rem;
}

.div2 {
    background: url(images/hero-desktop.jpg) no-repeat center/cover;
    width: 100%;
    height: 100vh;
}

.div3 {
    padding: 2.5rem;
}

.heading {
    font-weight: 300;
    text-transform: uppercase;
    color: var(--desaturated-red);
    font-size: 4rem;
    letter-spacing: 1rem;
}

.heading span {
    font-weight: 600;
    color: var(--dark-grayish-red);
}

.para {
    width: 25rem;
    margin: 1.875rem 0;
    font-weight: 400;
    line-height: 1.7;
    color: var(--desaturated-red);
}

.email-box {
    display: flex;
    align-items: center;
    width: 25rem;
    margin-top: 2.5rem;
    border-radius: 2.5rem;
    border: 1px solid hsla(0, 6%, 24%, 0.3);
    position: relative;
    background: white;
}

.email-box.error {
    animation: shake 0.3s ease-in-out;
    border-color: var(--soft-red);
}

input[type="email"] {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1rem;
    border-radius: 2.5rem;
    padding: 0.75rem 1.25rem;
    background: transparent;
}

input[type="email"]::placeholder {
    opacity: 0.6;
    color: var(--desaturated-red);
}

.error-icon {
    display: none;
    margin-right: 1rem;
}


.img-btn {
    border: none;
    outline: none;
    cursor: pointer;
    width: 5rem;
    height: 3rem;
    border-radius: 40px;
    background: linear-gradient(135deg, var(--gradient-color1), var(--gradient-color2));
    box-shadow: 0 6px 12px var(--desaturated-red);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.img-btn:hover {
    opacity: 0.6;
    transform: scale(1.05);
}

.error-mes {
    display: none;
    font-weight: 400;
    color: var(--soft-red);
    margin: 0.5rem 0 0 1.25rem;
    font-size: 0.875rem;
}

img.error-icon,
.error-mes {
    display: none;
}

/* Tablet Media Query */
@media (max-width: 900px) {
    .parent {
        display: flex;
        flex-direction: column;
    }

    .div1 {
        padding: 5px;
        height: auto;
    }

    .div3 {
        height: 50%;
        width: 100%;
        text-align: center;
    }

    .heading {
        line-height: 1.1;
        font-size: 3rem;
        margin-bottom: 1.5rem;
        letter-spacing: 0.6rem;
    }

    .para {
        max-width: 100%;
        line-height: 1.6;
        font-size: 1rem;
        margin: 1rem auto 2rem auto;
    }

    .email-box {
        max-width: 100%;
        margin: 2rem auto 0 auto;
    }

    input[type="email"] {
        padding: 0.875rem 1.25rem;
        font-size: 0.875rem;
    }

    .img-btn {
        width: 4rem;
        height: 2.75rem;
    }

    .error-mes {
        text-align: left;
        margin: 0.5rem 0 0 0;
        text-align: center;
    }
}

/* Mobile Media Query */
@media (max-width: 768px) {
    .div1 img {
        width: 10rem;
        padding: 1.5rem;
    }

    .div2 {
        height: 50vh;
        background: url(images/hero-mobile.jpg) no-repeat center/cover;
    }

    .div3 {
        height: 50%;
        width: 100%;
        text-align: center;
    }

    .heading {
        line-height: 1.1;
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }

    .para {
        max-width: 100%;
        line-height: 1.6;
        font-size: 0.8rem;
        margin: 1rem auto 2rem auto;
    }

    .email-box {
        overflow: hidden;
        min-width: 100%;
        margin: 2rem auto 0 auto;
    }

    input[type="email"] {
        min-width: 60%;
        padding: 0.875rem 1.25rem;
        font-size: 0.875rem;
    }

    .img-btn {
        min-width: 4rem;
        height: 2.75rem;
    }

    .error-mes {
        text-align: left;
        margin: 0.5rem 0 0 0;
        text-align: center;
    }
}



.email-box.error {
    animation: shake 0.3s ease-in-out;
}

/* Animation for form validation */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}