/* styles.css */

/* Подключение шрифта Tilda Sans */
@font-face {
    font-family: 'Tilda Sans';
    src: url('assets/font/TildaSans-Medium/TildaSans-Medium.woff2') format('woff2'),
         url('assets/font/TildaSans-Medium/TildaSans-Medium.woff') format('woff');
    font-weight: 500; /* Medium */
    font-style: normal;
    font-display: swap; 
}

@font-face {
    font-family: 'Tilda Sans';
    src: url('assets/font/TildaSans-ExtraBold/TildaSans-ExtraBold.woff2') format('woff2'),
         url('sassets/font/TildaSans-ExtraBold/TildaSans-ExtraBold.woff') format('woff');
    font-weight: 800; /* Extra Bold */
    font-style: normal;
    font-display: swap;
}

:root {
    --color-dark: #242424;
    --color-blue: #2134A0;
    --color-red: #DE2726;
    --color-bg-light: #F9F9F9;
    --color-white: #FFFFFF;
    --color-gray: #666666;
    --color-light-gray: #EEEEEE;
    
    /* Заменяем Inter на Tilda Sans */
    --font-main: 'Tilda Sans', sans-serif;
    
    --container-width: 1200px;
    --container-padding: 20px;
    
    --transition: 0.3s ease;
}

/* Reset и базовые стили */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-weight: 500; /* Medium для основного текста */
    color: var(--color-dark);
    line-height: 1.5;
    background-color: var(--color-white);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Типографика */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800; /* Extra Bold для заголовков */
    line-height: 1.2;
}

.section {
    padding: 80px 0;
}

.section__title {
    font-size: 36px;
    margin-bottom: 40px;
    color: var(--color-blue);
    position: relative;
    padding-bottom: 15px;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background-color: var(--color-red);
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn--primary {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-red);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(222, 39, 38, 0.3);
}

.btn--large {
    padding: 16px 48px;
    font-size: 18px;
}

/* Header */
.header {
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.header__logo-img {
    height: 50px;
    width: auto;
    border-radius: 4px;
}

.header__logo-img--large {
    width: 200px;  
    height: auto;
    border-radius: 4px;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav__link {
    text-decoration: none;
    color: var(--color-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav__link:hover {
    color: var(--color-blue);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-red);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

/* Бургер-меню */
.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.burger__line {
    width: 30px;
    height: 3px;
    background-color: var(--color-dark);
    transition: var(--transition);
}

.burger.active .burger__line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.burger.active .burger__line:nth-child(2) {
    opacity: 0;
}

.burger.active .burger__line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-white) 100%);
    padding: 60px 0;
    border-bottom: 3px solid var(--color-red);
}

.hero__additional {
    font-size: 16px;
    color: var(--color-blue);
    margin-top: 10px;
    font-weight: 500;
    padding-top: 10px;
    border-top: 1px dashed var(--color-light-gray);
    margin-bottom: 30px;
}

.hero__title {
    font-size: 42px;
    margin-bottom: 20px;
    color: var(--color-dark);
}

.hero__subtitle {
    font-size: 18px;
    color: var(--color-gray);
    margin-bottom: 30px;
    max-width: 900px;
}

.hero__info {
    display: flex;
    gap: 40px;
    margin-bottom: 30px;
}

.hero__date, .hero__location {
    font-size: 18px;
    color: var(--color-dark);
}

.hero_button {
    font-size: 18px;
    margin-right: 10px;
}

.hero__date i, .hero__location i {
    color: var(--color-red);
    margin-right: 10px;
}

.hero__logos {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 40px;
}

.hero__logo {
    height: 60px;
    width: auto;
    border-radius: 4px;
}

/* О проекте */
.about__content {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.about__text {
    font-size: 16px;
    color: var(--color-gray);
    line-height: 1.8;
}

/* Форматы */
.formats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.format-card {
    background-color: var(--color-white);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--color-light-gray);
}

.format-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(33, 52, 160, 0.1);
    border-color: var(--color-blue);
}

.format-card__icon {
    font-size: 48px;
    color: var(--color-red);
    margin-bottom: 20px;
}

.format-card__title {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--color-blue);
}

.format-card__text {
    font-size: 14px;
    color: var(--color-gray);
}

/* Программа  */
.program {
    background-color: var(--color-bg-light);
}

.program__placeholder {
    text-align: center;
    padding: 60px 40px;
    background-color: var(--color-white);
    border-radius: 10px;
    border: 2px dashed var(--color-light-gray);
}

.program__intro {
    font-size: 18px;
    color: var(--color-gray);
    margin-bottom: 40px;
    font-weight: 500;
}

.program__schedule {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.schedule-item {
    display: flex;
    background-color: var(--color-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-light-gray);
}

.schedule-item__time {
    min-width: 120px;
    background-color: var(--color-blue);
    color: var(--color-white);
    font-weight: 700;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
}

.schedule-item__description {
    padding: 20px;
    flex: 1;
    color: var(--color-dark);
}

.schedule-item__description strong {
    color: var(--color-blue);
    display: block;
    margin-bottom: 10px;
    font-size: 18px;
}

.schedule-item__list,
.schedule-item__prize-list {
    margin-left: 20px;
    margin-top: 10px;
    color: var(--color-gray);
}

.schedule-item__list li,
.schedule-item__prize-list li {
    margin-bottom: 5px;
}

.schedule-item__prizes {
    margin-top: 15px;
    font-weight: 500;
    color: var(--color-red);
}

.program__note {
    background-color: var(--color-bg-light);
    padding: 15px 20px;
    border-radius: 8px;
    border-left: 4px solid var(--color-red);
}

.program__note p {
    color: var(--color-gray);
    display: flex;
    align-items: center;
    gap: 10px;
}

.program__note i {
    color: var(--color-red);
    font-size: 20px;
}

@media (max-width: 768px) {
    .schedule-item {
        flex-direction: column;
    }
    
    .schedule-item__time {
        min-width: auto;
        padding: 10px;
    }
}

.program__icon {
    font-size: 64px;
    color: var(--color-blue);
    margin-bottom: 20px;
    opacity: 0.5;
}

.program__text {
    font-size: 24px;
    color: var(--color-dark);
    margin-bottom: 15px;
    font-weight: 500;
}

.program__subtext {
    font-size: 16px;
    color: var(--color-gray);
}

/* Аккордеон */
.info__description {
    margin-bottom: 40px;
    color: var(--color-gray);
    font-size: 18px;
}

.info__teaser {
    background: linear-gradient(135deg, var(--color-blue) 0%, #2a3db0 100%);
    color: var(--color-white);
    padding: 25px 30px;
    border-radius: 10px;
    margin-bottom: 40px;
    font-size: 18px;
    line-height: 1.6;
    box-shadow: 0 10px 30px rgba(33, 52, 160, 0.2);
}

.info__teaser strong {
    color: #DE2726;
    font-weight: 700;
}

.info-card {
    background-color: var(--color-bg-light);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--color-red);
}

.info-card h4 {
    color: var(--color-blue);
    font-size: 18px;
    margin-bottom: 10px;
}

.info-card p, .info-card ol {
    color: var(--color-gray);
    line-height: 1.8;
}

.info-card ol {
    margin-left: 20px;
}

.info-card--quote {
    background-color: var(--color-white);
    border-left: 4px solid var(--color-blue);
    font-style: italic;
    border-radius: 8px;
}

.info-card--quote p {
    font-size: 18px;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.info-card--quote cite {
    color: var(--color-red);
    font-weight: 500;
    display: block;
    text-align: right;
}

.info-card--quiz {
    background-color: #a3b7e9;
    border-left: 4px solid #DE2726;
}

.info-card--quiz h4 {
    color: #ffffff;
}

.accordion__content {
    padding: 0 25px;
}

.accordion__content.show {
    padding: 25px;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.accordion__item {
    border: 1px solid var(--color-light-gray);
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--color-white);
}

.accordion__header {
    width: 100%;
    padding: 20px 25px;
    background: none;
    border: none;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
    color: var(--color-dark);
    transition: var(--transition);
}

.accordion__header:hover {
    background-color: var(--color-bg-light);
}

.accordion__header.active {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.accordion__header.active .accordion__icon {
    transform: rotate(180deg);
}

.accordion__icon {
    transition: var(--transition);
    color: var(--color-red);
    font-size: 16px;
}

.accordion__header.active .accordion__icon {
    color: var(--color-white);
}

.accordion__content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    padding: 0 25px;
    background-color: var(--color-white);
}

.accordion__content.show {
    max-height: 500px;
    padding: 20px 25px;
}

.accordion__content p {
    color: var(--color-gray);
    line-height: 1.8;
}

/* Спикеры */
.speakers__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* Дополнительные стили для сетки спикеров */
.speakers__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

@media (max-width: 768px) {
    .speakers__grid {
        grid-template-columns: 1fr;
    }
}

.speaker-card {
    background-color: var(--color-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--color-light-gray);
    cursor: pointer;
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(33, 52, 160, 0.15);
    border-color: var(--color-blue);
}

.speaker-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 3px solid var(--color-red);
}

.speaker-card__content {
    padding: 20px;
}

.speaker-card__name {
    font-size: 20px;
    color: var(--color-blue);
    margin-bottom: 5px;
}

.speaker-card__position {
    font-size: 14px;
    color: var(--color-red);
    font-weight: 500;
    margin-bottom: 10px;
}

.speaker-card__description {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
}

/* Партнеры */
.partners__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.partner-card {
    text-align: center;
    padding: 20px;
    background-color: var(--color-white);
    border-radius: 10px;
    border: 1px solid var(--color-light-gray);
    transition: var(--transition);
}

.partner-card:hover {
    border-color: var(--color-blue);
}

.partner-card__logo {
    width: 100%;
    max-width: 150px;
    height: auto;
    margin-bottom: 15px;
    border-radius: 4px;
}

.partner-card__name {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.4;
}

/* Регистрация */
.registration {
    background: linear-gradient(135deg, var(--color-blue) 0%, #2a3db0 100%);
    color: var(--color-white);
    text-align: center;
}

.registration__content {
    max-width: 800px;
    margin: 0 auto;
}

.registration__title {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--color-white);
}

.registration__text {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.registration .btn--primary {
    background-color: var(--color-white);
    color: var(--color-blue);
}

.registration .btn--primary:hover {
    background-color: var(--color-red);
    color: var(--color-white);
}

/* Новости */
.news__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border-left: 4px solid var(--color-red);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(33, 52, 160, 0.1);
}

.news-card__date {
    font-size: 14px;
    color: var(--color-red);
    font-weight: 500;
    margin-bottom: 10px;
}

.news-card__title {
    font-size: 20px;
    color: var(--color-blue);
    margin-bottom: 10px;
}

.news-card__excerpt {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
}

/* Контакты */
.contacts__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.contact-info__title {
    font-size: 18px;
    color: var(--color-blue);
    margin-bottom: 10px;
}

.contact-info__text {
    color: var(--color-gray);
}

.contact-info__link {
    color: var(--color-dark);
    text-decoration: none;
    transition: var(--transition);
}

.contact-info__link:hover {
    color: var(--color-red);
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-link {
    color: var(--color-blue);
    font-size: 24px;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--color-red);
    transform: translateY(-3px);
}


/* Footer */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 30px 0;
    text-align: center;
}

.footer__text {
    opacity: 0.8;
    font-size: 14px;
    margin-bottom: 5px;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.show {
    display: flex;
}

.modal__content {
    background-color: var(--color-white);
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal__close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 30px;
    cursor: pointer;
    color: var(--color-gray);
    transition: var(--transition);
    line-height: 1;
}

.modal__close:hover {
    color: var(--color-red);
}

.modal__body {
    padding: 40px 30px;
}

.modal__name {
    font-size: 28px;
    color: var(--color-blue);
    margin-bottom: 10px;
}

.modal__position {
    font-size: 16px;
    color: var(--color-red);
    font-weight: 500;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--color-light-gray);
}

.modal__description {
    color: var(--color-gray);
    line-height: 1.8;
}

/* Видео блок */
.video-section {
    background-color: var(--color-bg-light);
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.forum-video {
    width: 50%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-color: #000;
}

.forum-video:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 40px rgba(33, 52, 160, 0.2);
}

.video-hint {
    margin-top: 15px;
    font-size: 14px;
    color: var(--color-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.video-hint i {
    color: var(--color-red);
    font-size: 16px;
}

/* Адаптивность для видео */
@media (max-width: 768px) {
    .forum-video:hover {
        transform: none;
    }
    
    .video-hint {
        font-size: 12px;
    }
}

/* Адаптивность */
@media (max-width: 992px) {
    .section {
        padding: 60px 0;
    }
    
    .section__title {
        font-size: 32px;
    }
    
    .hero__title {
        font-size: 36px;
    }
    
    .formats__grid,
    .speakers__grid,
    .partners__grid,
    .news__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .burger {
        display: flex;
    }
    
    .header__nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--color-white);
        transition: var(--transition);
        padding: 40px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }
    
    .header__nav.active {
        left: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .nav__link {
        font-size: 20px;
    }
    
    .hero__info {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero__logos {
        justify-content: center;
    }
    
    .section__title {
        font-size: 28px;
    }
    
    .formats__grid,
    .speakers__grid,
    .partners__grid,
    .news__grid,
    .contacts__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .speakers__grid {
        gap: 20px;
    }
    
    .contacts__grid {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .registration__title {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 28px;
    }
    
    .hero__subtitle {
        font-size: 16px;
    }
    
    .btn--large {
        padding: 14px 32px;
        font-size: 16px;
    }
    
    .format-card {
        padding: 20px 15px;
    }
    
    .program__placeholder {
        padding: 40px 20px;
    }
    
    .program__text {
        font-size: 20px;
    }
    
    .accordion__header {
        padding: 15px;
        font-size: 16px;
    }
}