/* ------------------- */
/* GLOBAL STYLES       */
/* ------------------- */
:root {
    --bg-dark: #111827;
    --surface: #1F2937;
    --text-primary: #E5E7EB;
    --text-secondary: #9CA3AF;
    --accent: #22D3EE;
    --accent-hover: #67E8F9;
    --font-body: 'Inter', sans-serif;
    --font-heading: 'Roboto Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
}

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

a:hover {
    color: var(--accent-hover);
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ------------------- */
/* HEADER              */
/* ------------------- */
.header {
    background-color: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--surface);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.header__logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.header__logo:hover {
    color: var(--accent);
}

.header__nav-list {
    display: flex;
    gap: 2rem;
}

.header__nav-link {
    font-size: 1rem;
    color: var(--text-secondary);
    position: relative;
    padding-bottom: 5px;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

.header__nav-link:hover {
    color: var(--text-primary);
}

.header__nav-link:hover::after {
    width: 100%;
}

.header__burger-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* ------------------- */
/* FOOTER              */
/* ------------------- */
.footer {
    background-color: var(--surface);
    padding-top: 4rem;
    margin-top: 6rem; /* Отступ от последнего блока контента */
    border-top: 1px solid #374151;
}

.footer__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 3rem;
    padding-bottom: 4rem;
}

.footer__logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--text-primary);
    display: inline-block;
    margin-bottom: 0.5rem;
}

.footer__tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer__heading {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer__link {
    color: var(--text-secondary);
}

.footer__link:hover {
    color: var(--accent);
}

.footer__list--contacts li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.footer__contact-icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 3px;
    color: var(--text-secondary);
}

.footer__link--static {
    color: var(--text-secondary);
}

.footer__bottom {
    background-color: var(--bg-dark);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ------------------- */
/* ADAPTIVE STYLES     */
/* ------------------- */
@media (max-width: 768px) {
    .header__nav {
        display: none; /* Будет управляться через JS */
    }

    .header__burger-btn {
        display: block;
    }

    .footer__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer__list--contacts li {
        justify-content: center;
    }
}
/* ------------------- */
/* BUTTONS             */
/* ------------------- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.button--primary {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.button--primary:hover {
    background-color: var(--accent-hover);
    color: var(--bg-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(34, 211, 238, 0.15);
}

.button--secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--surface);
}

.button--secondary:hover {
    background-color: var(--surface);
    color: var(--text-primary);
    border-color: var(--surface);
}


/* ------------------- */
/* HERO SECTION        */
/* ------------------- */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero__animation-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none; /* Чтобы не мешать кликам */
    transition: transform 0.2s ease-out; /* Для параллакса */
}

.hero__floating-word {
    position: absolute;
    font-family: var(--font-heading);
    color: rgba(156, 163, 175, 0.1); /* --text-secondary с низкой прозрачностью */
    will-change: transform;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) translateX(0) rotate(0deg); }
    25% { transform: translateY(-20px) translateX(15px) rotate(5deg); }
    50% { transform: translateY(0) translateX(-10px) rotate(-5deg); }
    75% { transform: translateY(15px) translateX(20px) rotate(3deg); }
    100% { transform: translateY(0) translateX(0) rotate(0deg); }
}

.hero__container {
    position: relative;
    z-index: 2;
}

.hero__content {
    max-width: 750px;
    margin: 0 auto;
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4rem); /* Адаптивный размер шрифта */
    margin-bottom: 1.5rem;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero__cta-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ------------------- */
/* GENERIC SECTION     */
/* ------------------- */
.section {
    padding: 6rem 0;
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ------------------- */
/* CONCEPTS SECTION    */
/* ------------------- */
.concepts {
    background-color: var(--bg-dark); /* Можно чередовать фон секций */
}

.concepts__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.concept-card {
    background-color: var(--surface);
    border: 1px solid #374151;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.concept-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    border-color: var(--accent);
}

.concept-card__icon {
    margin-bottom: 1.5rem;
}

.concept-card__icon i {
    width: 48px;
    height: 48px;
    color: var(--accent);
}

.concept-card__title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.concept-card__description {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ------------------- */
/* TECHNOLOGIES SECTION*/
/* ------------------- */
.technologies {
    background-color: var(--surface); /* Чередуем фон для визуального разделения */
}

.technologies__list {
    display: flex;
    flex-direction: column;
    gap: 5rem;
}

.tech-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.tech-item__image-wrapper img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    object-fit: cover;
    aspect-ratio: 4/3; /* Сохраняем пропорции изображения */
    background-color: #374151;
}

.tech-item__tag {
    display: inline-block;
    font-family: var(--font-heading);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.tech-item__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 1.5rem;
}

.tech-item__description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.tech-item__features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tech-item__features-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tech-item__features-list i {
    color: var(--accent);
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Модификатор для реверсивного блока */
.tech-item--reversed .tech-item__image-wrapper {
    order: 2;
}

/* Адаптивность */
@media (max-width: 992px) {
    .tech-item {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .tech-item,
    .tech-item--reversed {
        grid-template-columns: 1fr;
    }

    .tech-item--reversed .tech-item__image-wrapper {
        order: -1; /* Возвращаем изображение наверх в мобильной версии */
    }
    
    .tech-item__content {
        text-align: center;
    }
    
    .tech-item__features-list {
        display: inline-flex; /* Чтобы список был по центру */
        flex-direction: column;
        align-items: flex-start; /* Текст слева от иконки */
    }
}

/* ------------------- */
/* CASES SECTION       */
/* ------------------- */
.cases {
    background-color: var(--bg-dark);
}

.cases__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.case-card {
    display: block;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    color: var(--text-primary);
    aspect-ratio: 3 / 4;
    text-decoration: none;
}

.case-card__image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease-in-out;
    background-color: #374151;
}

.case-card:hover .case-card__image {
    transform: scale(1.05);
}

.case-card__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(17, 24, 39, 0) 0%, rgba(17, 24, 39, 0.4) 50%, rgba(17, 24, 39, 0.9) 100%);
    transition: background 0.3s ease;
}

.case-card__content {
    position: relative;
    z-index: 2;
    height: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.case-card__category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: rgba(34, 211, 238, 0.2);
    color: var(--accent);
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.case-card__title {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.case-card__description {
    color: var(--text-secondary);
    line-height: 1.5;
    opacity: 0;
    transition: opacity 0.3s ease;
    max-height: 0;
    overflow: hidden;
}

.case-card:hover .case-card__description {
    opacity: 1;
    max-height: 100px; /* Adjust as needed */
}

.case-card__link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.case-card:hover .case-card__link {
    opacity: 1;
    transform: translateY(0);
}

/* ------------------- */
/* METHODS SECTION     */
/* ------------------- */
.methods {
    background-color: var(--surface);
}

.methods__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

/* Модификаторы для выравнивания текста по левому краю */
.section__title--left,
.section__subtitle--left {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.methods__accordion {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.accordion-item {
    background-color: var(--bg-dark);
    border-radius: 8px;
    border: 1px solid #374151;
}

.accordion-item__header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
}

.accordion-item__title {
    font-size: 1.25rem;
    font-weight: 500;
    font-family: var(--font-body);
}

.accordion-item__icon {
    transition: transform 0.3s ease;
    color: var(--accent);
}

.accordion-item.active .accordion-item__icon {
    transform: rotate(180deg);
}

.accordion-item__content-wrapper {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.accordion-item__content {
    padding: 0 1.5rem 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Адаптивность для секции */
@media (max-width: 992px) {
    .methods__grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section__title--left,
    .section__subtitle--left {
        text-align: center;
    }
}

/* ------------------- */
/* CONTACT SECTION     */
/* ------------------- */
.contact {
    background-color: var(--bg-dark);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: flex-start;
    background-color: var(--surface);
    padding: 4rem;
    border-radius: 12px;
}

.contact__info-title {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.contact__info-text {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Переиспользование стилей из футера */
.contact__info .footer__list {
    text-align: left;
}
.contact__info .footer__list--contacts li {
    justify-content: flex-start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group label {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-dark);
    border: 1px solid #374151;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
}

.form-group--captcha {
    align-items: flex-start;
    flex-direction: row;
    gap: 1rem;
    align-items: center;
}

.captcha-question {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group--captcha input {
    width: 80px;
}

.form-group--checkbox {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
}

.form-group--checkbox label {
    margin: 0;
    font-size: 0.9rem;
}

.form-group--checkbox input[type="checkbox"] {
    width: 1.25em;
    height: 1.25em;
    accent-color: var(--accent);
}

.form-messages {
    padding: 1rem;
    border-radius: 8px;
    display: none; /* Скрыт по умолчанию */
    margin-bottom: 1rem;
    text-align: center;
}
.form-messages.error {
    display: block;
    background-color: rgba(239, 68, 68, 0.1);
    color: #F87171;
}
.form-messages.success {
    display: block;
    background-color: rgba(34, 197, 94, 0.1);
    color: #4ADE80;
}

.success-message {
    display: none; /* Скрыт по умолчанию */
    text-align: center;
    padding: 3rem;
}
.success-message i {
    color: #4ADE80;
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
}

@media (max-width: 992px) {
    .contact__grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .contact__grid {
        padding: 2rem;
    }
}

/* ------------------- */
/* COOKIE POPUP        */
/* ------------------- */
.button--small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.cookie-popup {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--surface);
    border-top: 1px solid #374151;
    padding: 1.5rem 0;
    z-index: 1000;
    transform: translateY(150%);
    transition: transform 0.5s ease-in-out;
}

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

.cookie-popup__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.cookie-popup__text {
    color: var(--text-secondary);
}

.cookie-popup__text a {
    color: var(--accent);
    text-decoration: underline;
}

.cookie-popup__text a:hover {
    text-decoration: none;
}

@media (max-width: 768px) {
    .cookie-popup__container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

/* ------------------- */
/* PAGES (PRIVACY, TERMS, ETC.) */
/* ------------------- */
.pages {
    padding: 4rem 0;
}

.pages .container {
    max-width: 800px; /* Делаем контейнер уже для лучшей читабельности текста */
}

.pages h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--surface);
    padding-bottom: 1rem;
}

.pages h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

.pages p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.pages a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.pages a:hover {
    color: var(--accent-hover);
    text-decoration: none;
}

.pages ul, .pages ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.pages li {
    margin-bottom: 0.75rem;
    line-height: 1.8;
}

.pages strong {
    color: var(--text-primary);
    font-weight: 500;
}