/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: black;
    color: white;
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-weight: bold;
    text-align: center;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Main Content */
main {
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
}

main > section {
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

/* Kyf kyf default landscape styles */
.background-color-green {
    background: #446900;
}

.background-color-red {
    background: #691100;
}

.introduction {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 64px;
}

.introduction-logo {
    width: 192px;
}

.introduction-tagline {
    width: 576px;
    font-size: 34px;
    line-height: 41px;
    letter-spacing: 0.4px;
}

.chapter {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 64px;
}

.chapter-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.chapter-header-number {
    font-size: 34px;
    line-height: 41px;
    letter-spacing: 0.4px;
}

.chapter-header-title {
    font-size: 50px;
    line-height: 60px;
    letter-spacing: 0.6px;
}

.illustration-strip {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.illustration-image {
    width: 343px;
    border-radius: 6px;
}

.mockup-image-and-description {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 64px;
}

.mockup-image {
    width: 372px;
}

.mockup-description {
    width: 360px;
    display: flex;
    flex-direction: column;
    gap: 41px;
    font-size: 34px;
    line-height: 41px;
    letter-spacing: 0.4px;
    text-align: left;
}

.conclusion {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 64px;
}

.conclusion-hashtag {
    font-size: 34px;
    line-height: 41px;
    letter-spacing: 0.4px;
}

.conclusion-button-cta {
    margin-top: -8px;
    margin-bottom: -8px;
}

.conclusion-socials {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

/* Kyf kyf mobile portrait styles */
@media (max-width: 768px) {
    main {
        height: 100%;
        scroll-snap-type: none;
    }

    main > section {
        scroll-snap-align: none;
        scroll-snap-stop: normal;
    }

    .introduction {
        gap: 42px;
    }

    .introduction-logo {
        width: 128px;
    }

    .introduction-tagline {
        width: 292px;
        font-size: 22px;
        line-height: 28px;
        letter-spacing: -0.26px;
    }

    .chapter {
        height: 100%;
        gap: 42px;
        padding: 64px 0px;
    }

    .chapter-header {
        width: 274px;
    }

    .chapter-header-number {
        font-size: 22px;
        line-height: 28px;
        letter-spacing: -0.26px;
    }

    .chapter-header-title {
        font-size: 34px;
        line-height: 41px;
        letter-spacing: 0.4px;
    }

    .illustration-strip {
        flex-direction: column;
        gap: 21px;
    }

    .illustration-image {
        width: 284px;
    }

    .mockup-image-and-description {
        flex-direction: column;
        gap: 42px;
        margin-top: -86px;
    }

    .mockup-image {
        width: 308px;
    }

    .mockup-description {
        width: 294px;
        gap: 28px;
        font-size: 22px;
        line-height: 28px;
        letter-spacing: -0.26px;
        text-align: center;
    }

    .conclusion {
        gap: 42px;
    }
}

/* Kyf kyf small mobile portrait styles */
@media (max-width: 320px) {
    .introduction-logo {
        width: 108px;
    }

    .introduction-tagline {
        width: 246px;
        font-size: 18px;
        line-height: 23px;
        letter-spacing: -0.21px;
    }

    .chapter {
        gap: 32px;
        padding: 48px 0px;
    }

    .chapter-header {
        width: 246px;
    }

    .chapter-header-number {
        font-size: 18px;
        line-height: 23px;
        letter-spacing: -0.21px;
    }

    .chapter-header-title {
        font-size: 27px;
        line-height: 33px;
        letter-spacing: 0.32px;
    }

    .illustration-strip {
        gap: 16px;
    }

    .illustration-image {
        width: 225px;
    }

    .mockup-image-and-description {
        gap: 32px;
        margin-top: -64px;
    }

    .mockup-image {
        width: 244px;
    }

    .mockup-description {
        width: 266px;
        gap: 23px;
        font-size: 18px;
        line-height: 23px;
        letter-spacing: -0.21px;
    }

    .conclusion-hashtag {
        font-size: 27px;
        line-height: 33px;
        letter-spacing: 0.32px;
    }
}