@import url('colors.css');
@import url('icons.css');

@import url('header.css');
@import url('footer.css');

@import url('./pages/main.css');
@import url('./pages/about.css');
@import url('./pages/affairs.css');
@import url('./pages/news.css');
@import url('./pages/events.css');
@import url('./pages/support.css');

@import url('./pages/content_pages/page_with_text.css');
@import url('./pages/content_pages/periodic_table.css');
@import url('./pages/content_pages/404.css');

@import url('./pages/element/aside.css');
@import url('./pages/element/search_card.css');
@import url('./pages/element/search.css');
@import url('./pages/element/page_navigation.css');
@import url('./pages/element/news_card.css');
@import url('./pages/element/events_card_list.css');
@import url('./pages/element/text_with_image.css');

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

body {
    font-family: "PT Sans", PTsans, Arial, sans-serif;
    background-color: var(--primary-background-back);
    color: var(--primary-text);
    font-size: 16px;
    line-height: 20px;
    font-family: "PT Sans", PTsans, Arial, sans-serif;
}

/* плавный переход страниц */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

button {
    margin: 0;
    border: none;
}

.flex {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: row;
}

img {
    width: 26px;
}

a {
    text-decoration: none;
    color: var(--link);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--link-hover);
    text-decoration: none;
}

.phone_visibility {
    display: none;
}

.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    padding-top: 100px;
}

@media (max-width: 1920px) {
    .container {
        max-width: 1240px;
    }
}

@media (max-width: 1240px) {
    .container {
        padding: 0 10px;
        padding-top: 109px;
    }
}

@media (max-width: 992px) {
    .content {
        max-width: 758px;
    }
    .visibility {
        display: none;
    }

    .phone_visibility {
        display: inline-block;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0;
        padding-top: 144px;
    }
}


h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    color: var(--primary-text);
}

h1 {
    font-size: calc(1.4rem + 0.6vw);
}

h2 {
    font-size: calc(1.2rem + 0.4vw);
}

h3 {
    font-size: calc(1.0rem + 0.4vw);
}


p,
.text {
    font-size: calc(1.1rem);
    color: var(--primary-text);
}

.text_date {
    font-size: calc(0.4rem + 0.2vw);
}

ul,
ol {
    padding-left: 20px;
}

li {
    margin: 0;
}

.hide_block {
    display: block;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}

th {
    background-color: #f1f1f1;
}

/* Для формы */
input,
textarea,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 10px;
}

.flex-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}


form {
    padding: 0;
    margin: 0;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

footer {
    margin-top: auto; 
    background: var(--primary-background);
    width: 100%;
    z-index: 2;
    position: relative; 
}