:root {
--Red: hsl(1, 90%, 64%);
--Blue: hsl(219, 85%, 26%);
--White: hsl(0, 0%, 100%);
--Very-light-grayish-blue: hsl(210, 60%, 98%);
--Light-grayish-blue1: hsl(211, 68%, 94%);
--Light-grayish-blue2: hsl(205, 33%, 90%);
--Grayish-blue: hsl(219, 14%, 63%);
--Dark-grayish-blue: hsl(219, 12%, 42%);
--Very-dark-blue: hsl(224, 21%, 14%);
}

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&family=Red+Hat+Text:ital,wght@0,300..700;1,300..700&family=Space+Grotesk:wght@300..700&display=swap');

* {
    padding: 0;
    margin: 0;
    font-family: sans-serif;
}

body {
    font-family: "Plus Jakarta Sans", sans-serif;
    background-color: var(--Light-grayish-blue1);
    padding: 20px;
}

main {
    width: 650px;
    margin: 50px auto;
    padding: 20px;
    background: var(--Very-light-grayish-blue);
    border-radius:8px;
    header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 25px;
       & h2 {
            color: var(--Very-dark-blue);
            font-size: 22px;
            & #coutner {
                background-color: var(--Blue);
                display: inline-block;
                margin-left: 5px;
                color: var(--Very-light-grayish-blue);
                padding: 2px 10px;
                font-size: 15px;
                border-radius: 4px;
            }
        }
        & #mark {
            color: var(--Grayish-blue);
            font-size: 14px;
            cursor: pointer;
            transition: .3s;
            &:hover {
                color: var(--Dark-grayish-blue);
            }
        }
    }
    .box.unread {
        background-color: var(--Light-grayish-blue1);
        & h3 {
            width: fit-content;
            & .bullet {
                border-radius: 50%;
                width: 7px;
                height:7px;
                background: red;
                display: inline-block;
                margin-left: 5px;
            }
        }
    }
     .box {
        max-width: 100%;
        align-items: flex-start;
        display: flex;
        padding: 10px;
        margin-bottom: 5px;
        & img {
            width: 40px;
            margin-right: 10px;
        }
        & div{
        & h3 {
            color: var(--Grayish-blue);
            font-size: 14px;
            & .name {
                color: var(--Very-dark-blue);
                margin-right: 5px;
                transition: 0.3s;
                cursor: pointer;
                &:hover {
                    color: var(--Blue);
                }
            }
        }
        & .post {
            color: var(--Dark-grayish-blue);
            margin-left: 5px;
            cursor: pointer;
            transition: .3s;
            &:hover {
                color: var(--Blue);
            }
        }
        & span {
            font-size: 13px;
            margin-top: 5px;
            color: var(--Grayish-blue);
        }
        & a {
            text-decoration: none;
            color: var(--Blue);
            cursor: pointer;
        }
        & p {
            border: 1px solid var(--Light-grayish-blue2);
            padding: 10px;
            color: var(--Grayish-blue);
            margin-top: 5px;
        }
        }
        & img:last-child {
            margin-left: auto;
            cursor: pointer;
        }
    }
}

@media (max-width:768px) {
    main {
        width: 89%;
    }
}