* {
    box-sizing: border-box;
    font-family: "Assistant", sans-serif;
    padding: 0;
    margin: 0;
}

@keyframes gradient-animation {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    background-color: #f0f0f0;
    padding: 20px;
    padding: 1px 1px 100px;
    background: linear-gradient(300deg,#ffffff,#ffffff,#183e9e38,#ffffff,#ffffff);
    background-size: 180% 180%;
    animation: gradient-animation 9s ease infinite;
    min-height: 100vh;
}

header {
    text-align: center;
    width: 90%;
    margin: 50px auto 30px;
}

header svg {
    display: block;
    margin: auto;
    max-width: 90%;
}

header p {
    font-size: 25px;
    margin: 40px auto 20px;
}

form input, form textarea, form button {
    border: 1px solid #7A7D81;
    border-radius: 3px;
    color: #000;
    font-size: 19px;
    margin-bottom: 10px;
    padding: 10px;
    width: 100%;
}

form button,
#show-form-btn {
    background-color: #E3906C;
    border: none;
    -webkit-appearance: none;
    font-weight: 700;
    font-size: 40px;
    color: #FFFFFF;
    display: block;
    letter-spacing: 0;
    text-align: center;
    line-height: 1;
    margin: 30px auto;
    padding: 10px 20px;
    margin-bottom: 0px !important;
    -webkit-transition: all .4s;
    -moz-transition: all .4s;
    -ms-transition: all .4s;
    -o-transition: all .4s;
    transition: all .4s;
    cursor: pointer;
}

form button:hover,
#show-form-btn:hover {
    background-color: #183E9E;
    color: #FFFFFF;
}

form button {
    margin: 0;
}

input[type="color"] {
    padding: 0;
}

.form-popup {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.form-popup-content {
    background-color: #fff;
    margin: 15% auto;
    padding: 45px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 15px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
}

.colors {
    display: flex;
    justify-content: center;
    gap: 20px;
}

#wall {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3%;
    margin: 20px auto;
    max-width: 1000px;
    width: 90%;
}

.post {
    aspect-ratio: 1 / 1;
    border-radius: 15px;
    box-shadow: 2px 2px 14px rgba(0, 0, 0, 0.4);
    /* filter: drop-shadow(0px 14px 30px rgba(0, 0, 0, 0.25)); */
    margin: 2% 0;
    padding: 15px 15px 30px;
    position: relative;
    width: 31%;
}

.post h3 {
    margin-top: 0;
    font-size: 28px;
    font-weight: 600;
}

.post p {
    font-size: 18px;
    font-weight: 300;
    margin: 10px 0;
}

.post small {
    display: block;
    position: absolute;
    bottom: 7px;
    right: 5%;
}

@media screen and (max-width: 1000px) {
    .post {
        width: 48%;
    }
}

@media screen and (max-width: 600px) {
    .post {
        width: 100%;
    }
}