* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
}

body {
    --space-color: #000000;
    --background-color: #ffffff;
    --primary-text-color: #181820;
    --secondary-text-color: #343438;
    --durability-text-color: #363b419c;
    --icon-color: #6a737d;
    --border-color: #0099ff45;
    --text-decoration-color: #0099ff;
    
    height: 100%;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
    background: var(--space-color) url(assets/the-orion-nebula.jpg) center / cover fixed no-repeat;
    color: var(--primary-text-color);
}

body.dark {
    --background-color: #181820;
    --primary-text-color: #c3ddff;
    --secondary-text-color: #e6e6e6;
    --durability-text-color: #c5c5c59c;
    --icon-color: #c1cedd;
    --border-color: #a6d4ff45;
    --text-decoration-color: #a6d4ff;
}

.container {
    margin: 0 auto;
    padding: 0 30px;
    max-width: 900px;
}

.interface-change-button {
    position: absolute;
    width: 3em;
    height: 3em;
    background-color: var(--background-color);
    border: 2px solid var(--icon-color);
    border-radius: 50%;
    padding: 10px;
    display: grid;
    justify-items: center;
    align-items: center;
    cursor: pointer;
}

.interface-change-button--switch {
    top: 60px;
    right: 10px;
}

.interface-change-button--hide {
    top: 60px;
    left: 10px;
}

.resume {
    background-color: var(--background-color);
    margin: 50px auto;
    border: 1px solid #f5f5f5;
    box-shadow: 1px 1px 7px 7px #f5f5f5;
    padding: 30px 0;
    max-width: 900px;
}

.visible {
    visibility: hidden;
}

.resume__block {
    border-bottom: 3px solid var(--border-color);
    padding-bottom: 30px;
    margin-bottom: 15px;
}

.contact_info_container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 1fr;
}

.contact-info__header,
.contact-info__sub-header {
    text-align: center;
}

.contact-info__header {
    color: var(--primary-text-color);
    margin-bottom: 15px;
    text-decoration-color: var(--text-decoration-color);
    text-decoration-line: underline;
}

.contact-info__sub-header {
    color: var(--secondary-text-color);
    margin-bottom: 30px;
}

.contact-info__block {
    display: grid;
    align-content: space-between;
}

.contact-info__block--center {
    justify-content: center;
    align-content: center;
}

.contact-info__block--right {
    justify-content: right;
}

.contact-info__item {
    color: var(--secondary-text-color);
    text-decoration: none;
    display: flex;
    justify-content: start;
}

.contact-info__item--not-recommended {
    cursor: not-allowed;
}

.contact-info__item:not(:last-child) {
    margin-bottom: 20px;
}

.contact-info__item-icon-wrapper {
    margin-right: 10px;
    width: 20px;
    display: grid;
    justify-items: center;
    align-items: center;
}

.contact-info__item-icon-wrapper i::before {
    fill: var(--icon-color);
}

.contact-info__item-icon {
    height: 1.1428rem;
    vertical-align: text-bottom;
}

.contact-info__avatar {
    border-radius: 5%;
    width: 150px;
    height: 150px;
    object-fit: cover;
    border: 3px solid;
    border-color: var(--text-decoration-color);
}

.intro {
    display: grid;
    grid-template-columns: min-content auto;
}

.intro__icon-wrapper {
    margin-right: 20px;
    width: 30px;
    display: grid;
    justify-content: center;
}

.intro__icon {
    height: 1.1428rem;
    vertical-align: text-bottom;
}

.intro__icon path {
    fill: var(--text-decoration-color);
}

.intro_text {
    color: var(--secondary-text-color);
    text-align: justify;
}

.skills__header {
    color: var(--secondary-text-color);
    text-align: center;
    margin-bottom: 15px;
}

.skills__text {
    color: var(--secondary-text-color);
    text-align: justify;
    margin-bottom: 15px;
}

.skills__text--emphasized {
    color: var(--primary-text-color);
    font-weight: bold;
}

.main-info {
    display: grid;
    grid-template-columns: 6fr 4fr;
    grid-template-rows: 1fr;
}

.experiences {
    margin-right: 50px;
}

.experiences__header {
    color: var(--secondary-text-color);
    text-align: left;
    margin-bottom: 20px;
}

.experiences__company-header-durability {
    color: var(--durability-text-color);
    text-align: left;
    margin-bottom: 10px;
    font-size: 15px;
}

.experiences__company-header-name {
    color: var(--primary-text-color);
    text-decoration-color: var(--text-decoration-color);
    text-decoration-line: underline;
    text-align: left;
    margin-bottom: 20px;
}

.experiences__company-project {
    margin-left: 15px;
    margin-bottom: 25px;
}

.experiences__company-project-role {
    color: var(--durability-text-color);
    text-align: left;
    margin-bottom: 10px;
    font-size: 15px;
}

.experiences__company-project-name {
    color: var(--primary-text-color);
    text-align: left;
    margin-bottom: 10px;
}

.experiences__company-project-responsibilities {
    color: var(--secondary-text-color);
    padding-left: 20px;
}

.additional-info__education {
    margin-bottom: 20px;
}

.additional-info__education-header {
    color: var(--secondary-text-color);
    text-align: left;
    margin-bottom: 20px;
}

.additional-info__education-university-durability {
    color: var(--durability-text-color);
    text-align: left;
    margin-bottom: 10px;
    font-size: 15px;
}

.additional-info__education-university-speciality {
    color: var(--primary-text-color);
    text-align: left;
    margin-bottom: 10px;
}

.additional-info__education-university-name {
    color: var(--secondary-text-color);
}

.additional-info__languages {
    margin-bottom: 20px;
}

.additional-info__languages-header {
    color: var(--secondary-text-color);
    text-align: left;
    margin-bottom: 20px;
}

.additional-info__languages-item {
    color: var(--secondary-text-color);
}

@media screen and (max-width: 576px) {
    .interface-change-button {
        width: 2em;
        height: 2em;
        padding: 4px;
    }

    .main-info,
    .contact_info_container {
        grid-template-columns: 1fr;
    }

    .contact_info_container {
        align-items: center;
    }
    
    .contact-info__block--center {
        order: -1;
    }

    .contact-info__block--right {
        justify-content: left;
    }

    .contact-info__block:not(:last-child) {
        margin-bottom: 20px;
    }

    .experiences {
        margin-right: 0;
    }

}