:root {
    --red: hsl(0, 100%, 68%);
    --very-dark-blue: hsl(230, 29%, 20%);
    --dark-grayish-blue: hsl(230, 11%, 40%);
    --grayish-blue: hsl(231, 7%, 65%);
    --light-grayish-blue: hsl(207, 33%, 95%);
    --fw-400: 400;
    --fw-700: 700;
}

/* reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

html {
    font-size: 18px;
    overflow: hidden;
}

/* background */
.background {
    background-color: var(--light-grayish-blue);
    position: absolute;
    right: 0;
    top: 0;
    width: 50vw;
    height: 57vh;
    z-index: -1;
    border-bottom-left-radius: 4.688rem;
}

/* constructor style */
body {
    font-family: 'Barlow', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
}

.container {
    max-width: 60rem;
    padding: 0;
    width: 90%;
}

header {
    padding-block: 4rem;
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Barlow Condensed', sans-serif;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 3rem;
}

main {
    display: flex;
    font-family: 'Barlow Condensed', sans-serif;
    gap: 4rem;
}

.main-image img {
    max-width: 178%;
}

.main-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
    max-width: 32rem;
}

.button {
    margin-top: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

/* content style */

/* header */
a {
    text-decoration: none;
    font-weight: var(--fw-700);
    color: var(--very-dark-blue);
    text-transform: uppercase;
}

.login {
    color: var(--dark-grayish-blue);
}

li:last-child {
    list-style-type: disc;
    color: var(--grayish-blue);
    opacity: 0.5;
    padding-left: 2rem;
    margin-left: 1rem;
}

/* main */
.new {
    background-color: var(--very-dark-blue);
    color: var(--light-grayish-blue);
    padding: 0.2rem 0.6rem;
    border-radius: 30px;
    font-weight: var(--fw-700);
    text-transform: uppercase;
    text-align: center;
    margin-right: 0.8rem;
    font-size: 0.9rem;
    letter-spacing: 0;
}

.dashboard {
    text-transform: uppercase;
    color: var(--grayish-blue);
    letter-spacing: 0.2rem;
    font-weight: var(--fw-400);
}

.title {
    font-size: 3.5rem;
    text-transform: uppercase;
    font-weight: var(--fw-700);
}

.subtitle {
    color: var(--dark-grayish-blue);
    font-weight: var(--fw-400);
    font-family: 'Barlow', sans-serif;
    padding-right: 18ch;
}

.button button {
    text-transform: uppercase;
    padding: 0.8rem 1.6rem;
    border-radius: 0.4rem;
    border: none;
    background-color: var(--red);
    color: var(--light-grayish-blue);
    font-weight: var(--fw-700);
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1rem;
    cursor: pointer;
}

.button span {
    text-transform: uppercase;
    color: var(--grayish-blue);
    letter-spacing: 0.2rem;
    font-weight: var(--fw-400);
    font-size: 0.8rem;
}

.img {
    content: url(images/icon-hamburger.svg);
}

/* interactive */
a:hover {
    text-decoration: 1px solid underline var(--dark-grayish-blue);
}

button:hover {
    opacity: 0.8;
}

/* visibility */
.visible {
    display: none;
}

/* mobile design */

@media(max-width: 800px) {
    html {
        font-size: 16px;
    }

    body {
        overflow-x: hidden;
    }

    header {
        padding-block: 0;
        margin-bottom: 2.5rem;
    }

    main {
        flex-direction: column-reverse;
        align-items: flex-start;
    }

    .container {
        min-height: 100vh;
        width: 100%;
        padding: 2rem;
    }

    .main-content {
        gap: 1rem;
        margin-top: 2.5rem;
    }

    .button {
        margin-top: 0.5rem;
        gap: 1rem;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
        padding: 1rem 2rem;
        position: absolute;
        top: 0;
        left: 3rem;
        right: 3rem;
        background-color: white;
        box-shadow: 0px 10px 20px -10px var(--dark-grayish-blue);
        transform: translateY(50%);
    }

    .login {
        margin: 0;
        border-top: 1px solid grey;
        padding: 1rem 6rem 0 6rem;
    }

    li:last-child {
        list-style-type: none;
        padding: 1rem 0 0 0;
        margin: 0;
    }

    header img {
        width: 23px;
    }

    .main-image img {
        max-width: 150%;
    }

    .title {
        font-size: 2.5rem;
    }

    .subtitle {
        padding-right: 2ch;
    }

    .button button {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .button span {
        letter-spacing: 0;
        font-size: 1rem;
    }

    /* visibility */
    .nav-menu {
        display: none;
    }

    .visible {
        display: block;
    }
}