:root {
    --clr-strong-cyan: hsl(171, 66%, 44%);
    --clr-light-blue: hsl(233, 100%, 69%);
    --clr-dark-grayish-blue: hsl(210, 10%, 33%);
    --clr-grayish-blue: hsl(201, 11%, 66%);
    --clr-white: hsl(0, 0%, 100%);

    --ff-default: "Bai Jamjuree", sans-serif;

    --fw-400: 400;
    --fw-600: 600;
}

body {
    min-height: 100vh;
    font-family: var(--ff-default);
    font-size: 16px;
    font-weight: var(--fw-400);
    color: var(--clr-dark-grayish-blue);
}

/* Helper classes */

.flex {
    display: flex;
    align-items: center;
}

/* Text styles */

.section-title, h3, h4 {
    font-weight: var(--fw-600);
}

.section-title {
    line-height: 1.25;
}

.header .section-title {
    margin-bottom: 1rem;
}

.btn {
    color: var(--clr-white);
    font-weight: var(--fw-600);
    font-size: 16px;
}

.section-header .section-title {
    margin-bottom: 1rem;
}

.one-list h3 {
    font-size: 1.5rem;
}

.card h4 {
    font-size: 1.375rem;
}

.footer-nav ul li a{
    color: inherit;
    text-decoration: none;
}

/* General styles */

.wrapper {
    min-height: 100vh;
}

section {
    padding: 5rem 0;
}

.container {
    max-width: 375px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.header {
    background-image: url(../images/bg-header-mobile.png);
    background-repeat: no-repeat;
    padding-bottom: 5rem;
}

.header .container {
    min-height: 100vh;
    padding-bottom: 2rem;
    flex-direction: column;
    justify-content: flex-end;
    gap: 3rem;
}

.header-btns,
.five-btns {
    flex-direction: column;
    gap: 1rem;
}

.header-btns {
    margin-top: 3rem;
}

.btn {
    display: block;
    padding: 0.75rem 2rem;
    min-width: 100%;
    border-radius: 2rem;
    border: none;
}

.btn:first-of-type {
    background-color: var(--clr-strong-cyan);
}
.btn:last-of-type {
    background-color: var(--clr-light-blue);
}

.section-header {
    margin-bottom: 4rem;
}

.one-content {
    flex-direction: column;
}

.one-list {
    margin-top: 3rem;
    list-style: none;
    padding: 0 0.25rem;
}

.one-list *:not(:last-of-type) {
    margin-bottom: 2.5rem;
}

.two img {
    margin: 0 auto;
}

.three-content {
    flex-direction: column;
    gap: 3rem;
}

.card {
    flex-direction: column;
    gap: 2rem;
}

.card img {
    max-height: 32px;
}

.card-title {
    margin-bottom: 1rem;
}

.four .container {
    flex-direction: column;
    justify-content: space-around;
}

.footer .container,
.footer-nav {
    flex-direction: column;
}

.footer {
    margin-top: 6rem;
    background-color: hsla(202, 11%, 66%, 0.1);
    padding: 3rem 0;
}

.footer .container {
    gap: 3rem;
}

.footer-logo {
    max-width: 4rem;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav ul li {
    margin-bottom: 2rem;
}

.footer-nav ul:last-of-type li:last-of-type {
    margin-bottom: 0;
}

.social-media {
    gap: 3rem;
}

@media (min-width: 376px) {
    .header {
        background-image: url(../images/bg-header-desktop.png);
    }
}

@media (min-width: 750px) {

    body {
        font-size: 18px;
    }

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

    .desc {
        max-width: 682px;
        margin: 0 auto;
    }

    section {
        padding: 0;
    }

    section:not(.one) {
        padding: 5rem 0;
    }

    .container {
        max-width: 1280px;
        padding: 0 4rem;
    }

    .header {
        padding-bottom: 0;
    }


    .header .container {
        justify-content: center;
    }

    .header-btns,
    .five-btns {
        flex-direction: row;
        justify-content: center;
    }

    .btn {
        min-width: auto;
    }

    .one {
        margin-bottom: 5rem;
    }

    .one-content {
        padding-top: 2rem;
        flex-direction: row;
        justify-content: space-between;
    }

    .one-content img {
        flex: 1;
        max-width: 50%;
    }

    .one-list {
        flex: 1;
        max-width: 40%;
        text-align: left;
        margin: 0;
        padding: 0;
    }

    .card {
        flex: 1;
        max-width: 50%;
    }
}

@media (min-width: 990px) {
    .three-content {
        align-items: flex-start;
        flex-direction: row;
    }

    .card {
        flex: 1;
    }

    .four .container {
        flex-direction: row;
    }

    .footer .container {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
        justify-content: space-between;
    }

    .footer-nav {
        flex: 1;
        flex-direction: row;
        align-items: flex-start;
        gap: 5rem;
        margin-left: 2rem;
    }

    .footer-nav ul li {
        margin-bottom: 1rem;
    }

    .footer-nav ul li a:hover {
        color: var(--clr-strong-cyan);
    }

    .btn:hover {
        opacity: 0.8;
    }

    .footer-nav ul li a:hover,
    .btn:hover {
        cursor: pointer;
    }
}

@media (min-width: 1440px) {
    .header {
        background-size: cover;
    }
}