/* ==========================================================================
   Этап 0: Глобальные стили и налаштування
   ========================================================================== */

/* Переменные */
:root {
    --font-main: 'Manrope', sans-serif;
    --font-accent: 'Roboto Mono', monospace;

    --color-bg: #FFFFFF;
    --color-text: #111827;
    --color-text-secondary: #6B7280;
    --color-primary: #4F46E5;
    --color-primary-hover: #4338CA;
    --color-border: #E5E7EB;
    
    --color-footer-bg: #1F2937;
    --color-footer-text: #D1D5DB;

    --container-width: 1140px;
    --container-padding: 16px;
    --header-height: 72px;
}

/* Сброс стилей и базовые настройки */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

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

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


/* ==========================================================================
   Этап 1: Хедер (<header>)
   ========================================================================== */

.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.header__logo {
    font-family: var(--font-accent);
    font-size: 24px;
    font-weight: 500;
    color: var(--color-text);
}

.header__nav {
    display: none; /* Скрыто на мобильных */
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text-secondary);
}

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

.nav__link--button {
    background-color: var(--color-primary);
    color: white;
    padding: 8px 20px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.nav__link--button:hover {
    background-color: var(--color-primary-hover);
    color: white;
}

.header__burger {
    display: block; /* Показываем бургер на мобильных */
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
}


/* Адаптивность хедера */
@media (min-width: 768px) {
    .header__burger {
        display: none;
    }
    .header__nav {
        display: block;
    }
}


/* ==========================================================================
   Этап 2: Футер (<footer>)
   ========================================================================== */

.footer {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: 64px 0 0;
}

.footer__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer__logo {
    font-family: var(--font-accent);
    font-size: 28px;
    color: white;
    margin-bottom: 16px;
    display: inline-block;
}

.footer__tagline {
    font-size: 14px;
    color: var(--color-text-secondary);
    max-width: 250px;
}

.footer__title {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__link {
    font-size: 14px;
    color: var(--color-footer-text);
}

.footer__link:hover {
    color: white;
    text-decoration: underline;
}

.footer__list--contacts .footer__link,
.footer__address {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer__icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.footer__address {
    font-size: 14px;
    font-style: normal;
    color: var(--color-footer-text);
}

.footer__bottom {
    border-top: 1px solid #374151;
    padding: 24px 0;
    text-align: center;
}

.footer__bottom p {
    font-size: 12px;
    color: var(--color-text-secondary);
}


/* Адаптивность футера */
@media (min-width: 768px) {
    .footer__container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer__container {
        grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
        gap: 32px;
    }
}
/* ==========================================================================
   Общие компоненты (например, кнопки)
   ========================================================================== */

.button {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--color-primary);
    color: white;
    font-weight: 700;
    font-size: 16px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.button:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
}


/* ==========================================================================
   Этап 3: Hero секция
   ========================================================================== */

.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: 60px 0;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: center;
}

.hero__content {
    text-align: center;
}

.hero__title {
    font-size: 42px;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
}

.hero__animation {
    position: relative;
    width: 100%;
    max-width: 500px;
    height: 350px;
    margin: 0 auto;
}

#hero-canvas {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    background: linear-gradient(145deg, #f0f2f5, #ffffff);
    box-shadow: 5px 5px 15px #d1d9e6, -5px -5px 15px #ffffff;
}

/* Адаптивность Hero секции */
@media (min-width: 768px) {
    .hero__title {
        font-size: 54px;
    }
}

@media (min-width: 1024px) {
    .hero {
        min-height: calc(100vh - var(--header-height));
    }
    .hero__container {
        grid-template-columns: 1fr 1fr;
        gap: 64px;
    }
    .hero__content {
        text-align: left;
    }
    .hero__subtitle {
        margin: 0 0 32px;
    }
}

/* ==========================================================================
   Секция "Концепции"
   ========================================================================== */

.concepts {
    padding: 80px 0;
    background-color: #F9FAFB; /* Slightly off-white background */
}

.concepts__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.concepts__title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.concepts__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.concepts__tabs-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.concepts__tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.concepts__tab-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 700;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-bg);
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--color-text-secondary);
}

.concepts__tab-button:hover {
    background-color: #F3F4F6;
    color: var(--color-text);
}

.concepts__tab-button.is-active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.concepts__panel {
    display: none; /* Скрываем все панели по умолчанию */
    grid-template-columns: 1fr;
    align-items: center;
    gap: 32px;
    padding: 24px;
    border-radius: 12px;
    background-color: var(--color-bg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.concepts__panel.is-active {
    display: grid; /* Показываем активную */
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.concepts__panel-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
}

.concepts__panel-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.concepts__panel-text p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}


/* Адаптивность секции "Концепции" */
@media (min-width: 768px) {
    .concepts__panel {
        grid-template-columns: 1fr 1.5fr;
        gap: 48px;
        padding: 40px;
    }
     .concepts__panel-image {
        order: 1; /* By default image is on the left */
    }
    .concepts__panel-text {
        order: 2;
    }
    /* Чередуем изображение и текст для динамики */
    #panel-blockchain {
        grid-template-columns: 1.5fr 1fr;
    }
    #panel-blockchain .concepts__panel-image {
        order: 2;
    }
    #panel-blockchain .concepts__panel-text {
        order: 1;
    }
}

/* ==========================================================================
   Секция "Технологии"
   ========================================================================== */

.tech {
    padding: 80px 0;
    background-color: var(--color-bg);
}

.tech__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.tech__title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.tech__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.tech__grid {
    display: grid;
    gap: 24px;
    /* Адаптивная сетка: 1 колонка на мобильных, 2-3 на больших экранах */
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.tech-card {
    background-color: white;
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
}

.tech-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background-color: #EEF2FF; /* Indigo-100 */
    color: var(--color-primary);
    margin-bottom: 24px;
}

.tech-card__icon i {
    width: 28px;
    height: 28px;
}

.tech-card__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tech-card__description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   Секция "Кейсы"
   ========================================================================== */
.cases {
    padding: 80px 0;
    background-color: #F9FAFB; /* Off-white background */
}

.cases__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.cases__title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cases__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.cases__slider-wrapper {
    position: relative;
}

.cases__slider-track {
    display: flex;
    gap: 24px;
}

.case-slide {
    background-color: white;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.case-slide__image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.case-slide__content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.case-slide__tag {
    display: inline-block;
    background-color: #DBEAFE; /* Blue-100 */
    color: #2563EB; /* Blue-600 */
    padding: 4px 10px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 16px;
    align-self: flex-start;
}

.case-slide__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.case-slide__description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.cases__slider-nav {
    display: none; /* Скрыто по умолчанию, появится на десктопах */
}


/* Адаптивность и логика слайдера */
@media (max-width: 1023px) {
    /* На мобильных и планшетах - просто вертикальный список */
    .cases__slider-track {
        flex-direction: column;
    }
}

@media (min-width: 1024px) {
    .cases__slider-wrapper {
        overflow: hidden;
    }

    .cases__slider-track {
        transition: transform 0.5s ease-in-out;
    }

    .case-slide {
        flex: 0 0 calc(50% - 12px); /* Показываем по 2 слайда */
    }

    .cases__slider-nav {
        display: flex;
        justify-content: center;
        gap: 16px;
        margin-top: 32px;
    }
    
    .cases__nav-button {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background-color: white;
        border: 1px solid var(--color-border);
        color: var(--color-text);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s ease;
    }

    .cases__nav-button:hover {
        background-color: var(--color-primary);
        color: white;
        border-color: var(--color-primary);
    }

    .cases__nav-button:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        background-color: #F3F4F6;
        color: var(--color-text-secondary);
        border-color: var(--color-border);
    }
}

@media (min-width: 1200px) {
    .case-slide {
        flex: 0 0 calc(33.333% - 16px); /* Показываем по 3 слайда */
    }
}

/* ==========================================================================
   Секция "Авторы"
   ========================================================================== */
.authors {
    padding: 80px 0;
    background-color: var(--color-bg);
}

.authors__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.authors__title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.authors__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.authors__grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    max-width: 900px;
    margin: 0 auto;
}

.author-card {
    background-color: white;
    padding: 32px 24px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.author-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
}

.author-card__image {
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid white;
    box-shadow: 0 0 0 1px var(--color-border);
}

.author-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-card__name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.author-card__role {
    font-size: 14px;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.author-card__socials {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.author-card__socials a {
    color: var(--color-text-secondary);
    transition: color 0.2s ease, transform 0.2s ease;
}

.author-card__socials a:hover {
    color: var(--color-primary);
    transform: scale(1.1);
}

/* ==========================================================================
   Этап 4: Секция контактов
   ========================================================================== */
.contact {
    padding: 80px 0;
    background-color: #F9FAFB; /* Off-white background */
}

.contact__wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: center;
}

.contact__title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact__subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact__link {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 700;
}

.contact__link:hover {
    color: var(--color-primary);
}

.contact__form-wrapper {
    position: relative;
}

.contact__form {
    background-color: white;
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group__label {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-group__input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 16px;
    font-family: var(--font-main);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group--checkbox {
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.form-group--checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.form-group--checkbox label {
    margin: 0;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.form-group--checkbox a {
    color: var(--color-primary);
    text-decoration: underline;
}

.contact__button {
    width: 100%;
}

.form-message {
    padding: 16px;
    border-radius: 8px;
    margin-top: 20px;
    display: none; /* Скрыто по умолчанию */
    text-align: center;
}

.form-message--success {
    display: block;
    background-color: #D1FAE5; /* Green-100 */
    color: #065F46; /* Green-800 */
}

.form-message--error {
    display: block;
    background-color: #FEE2E2; /* Red-100 */
    color: #991B1B; /* Red-800 */
}


/* Адаптивность */
@media (min-width: 1024px) {
    .contact__wrapper {
        grid-template-columns: 1fr 1.2fr;
        gap: 64px;
    }
}
/* ==========================================================================
   Этап 5.1: Cookie Pop-up
   ========================================================================== */
.cookie-popup {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.1);
    transform: translateY(100%);
    transition: transform 0.5s ease-in-out;
    z-index: 200;
}

.cookie-popup.is-visible {
    transform: translateY(0);
}

.cookie-popup__text {
    font-size: 14px;
    text-align: center;
}

.cookie-popup__text a {
    color: white;
    text-decoration: underline;
}

.cookie-popup__button {
    padding: 8px 24px;
    font-size: 14px;
    font-weight: 700;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.cookie-popup__button:hover {
    background-color: var(--color-primary-hover);
}

@media (min-width: 768px) {
    .cookie-popup {
        flex-direction: row;
        justify-content: space-between;
        padding: 16px 32px;
    }
    .cookie-popup__text {
        text-align: left;
    }
}

/* ==========================================================================
   Этап 5.2: Стили для страниц политик (privacy.html, terms.html, etc.)
   ========================================================================== */
.pages {
    padding: 60px 0;
    background-color: var(--color-bg);
}

.pages .container {
    max-width: 800px; /* Делаем контентную область уже для лучшей читаемости */
}

.pages h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 16px;
}

.pages h2 {
    font-size: 28px;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
}

.pages p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.pages a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 700;
}

.pages a:hover {
    text-decoration: underline;
}

.pages ul {
    list-style-type: disc;
    padding-left: 20px;
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

.pages li {
    margin-bottom: 10px;
    line-height: 1.7;
}

.pages strong {
    color: var(--color-text);
    font-weight: 700;
}