/* ===== Базовые сбросы и переменные ===== */
:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-accent: #0077ff;
    --color-accent-hover: #0055cc;
    --color-border: #e5e5e5;
    --color-card-bg: #f8f9fa;
    
    --container-width: 1200px;
    --container-padding: 20px;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.5;
    background-color: var(--color-bg);
}

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

/* ===== Типографика ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: 40px;
    margin-bottom: 60px;
    text-align: center;
}

.section-title--accent {
    color: var(--color-accent);
    display: block;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
        margin-bottom: 40px;
    }
}

/* ===== Кнопки ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn--small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn--large {
    padding: 16px 32px;
    font-size: 18px;
}

.btn--full {
    width: 100%;
}

.btn:not(.btn--outline) {
    background-color: var(--color-accent);
    color: white;
}

.btn:not(.btn--outline):hover {
    background-color: var(--color-accent-hover);
}

.btn--outline {
    background-color: transparent;
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn--outline:hover {
    background-color: var(--color-accent);
    color: white;
}

/* ===== Шапка ===== */
.header {
    position: sticky;
    top: 0;
    background-color: white;
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

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

.header__nav {
    display: flex;
    align-items: center;
}

.header__menu {
    display: flex;
    gap: 32px;
    list-style: none;
}

.header__menu a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
}

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

.header__contacts {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header__phone {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.burger span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

@media (max-width: 992px) {
    .header__nav,
    .header__contacts {
        display: none;
    }
    
    .burger {
        display: flex;
    }
    
    .header__nav.active {
        display: block;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: white;
        padding: 20px;
        border-bottom: 1px solid var(--color-border);
    }
    
    .header__nav.active .header__menu {
        flex-direction: column;
        gap: 16px;
    }
    
    .header__nav.active + .header__contacts {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 280px;
        left: 0;
        right: 0;
        padding: 20px;
        background-color: white;
    }
}

/* ===== Hero секция ===== */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f9ff 0%, #ffffff 100%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero__title {
    font-size: 56px;
    margin-bottom: 24px;
}

.hero__title--accent {
    color: var(--color-accent);
}

.hero__subtitle {
    font-size: 20px;
    color: var(--color-text-light);
    margin-bottom: 40px;
}

.hero__actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

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

.stat-item__number {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.stat-item__label {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.4;
}

.stat-item__source {
    font-size: 12px;
    color: #999;
}

.hero__image img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

@media (max-width: 992px) {
    .hero__container {
        grid-template-columns: 1fr;
    }
    
    .hero__title {
        font-size: 42px;
    }
    
    .hero__stats {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 40px 0;
    }
    
    .hero__title {
        font-size: 32px;
    }
    
    .hero__subtitle {
        font-size: 18px;
    }
    
    .hero__actions {
        flex-direction: column;
    }
    
    .hero__stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* ===== Секция трендов ===== */
.trend {
    padding: 100px 0;
    background-color: white;
}

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

.trend-card {
    padding: 30px;
    background-color: var(--color-card-bg);
    border-radius: 16px;
    transition: var(--transition);
}

.trend-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.trend-card--highlight {
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    border: 1px solid var(--color-accent);
}

.trend-card__flag {
    width: 40px;
    height: 40px;
    margin-bottom: 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.trend-card__flag--china {
    background-image: url('../images/flag-china.svg');
}

.trend-card__flag--japan {
    background-image: url('../images/flag-japan.svg');
}

.trend-card__flag--korea {
    background-image: url('../images/flag-korea.svg');
}

.trend-card__flag--russia {
    background-image: url('../images/flag-russia.svg');
}

.trend-card__title {
    font-size: 20px;
    margin-bottom: 12px;
}

.trend-card__text {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .trend__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .trend {
        padding: 60px 0;
    }
    
    .trend__grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Секция преимуществ ===== */
.benefits {
    padding: 100px 0;
    background-color: var(--color-card-bg);
}

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

.benefit-card {
    padding: 40px 30px;
    background-color: white;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.benefit-card__icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.benefit-card__title {
    font-size: 20px;
    margin-bottom: 12px;
}

.benefit-card__text {
    color: var(--color-text-light);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .benefits__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .benefits {
        padding: 60px 0;
    }
    
    .benefits__grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Портфолио ===== */
.portfolio {
    padding: 100px 0;
    background-color: white;
}

.portfolio__filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 30px;
    background: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.portfolio-card {
    border-radius: 16px;
    overflow: hidden;
    background-color: var(--color-card-bg);
    transition: var(--transition);
}

.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.portfolio-card__image {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.portfolio-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.portfolio-card__content {
    padding: 20px;
}

.portfolio-card__tags {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 8px;
    background-color: rgba(0,119,255,0.1);
    border-radius: 4px;
    font-size: 12px;
    color: var(--color-accent);
}

.portfolio-card__title {
    font-size: 18px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.portfolio-card__result {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.result-label {
    font-weight: 600;
    color: var(--color-text);
}

.portfolio-card__link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.portfolio__more {
    text-align: center;
}

@media (max-width: 992px) {
    .portfolio__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portfolio {
        padding: 60px 0;
    }
    
    .portfolio__grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio__filters {
        gap: 8px;
    }
    
    .filter-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}

/* ===== Технологии ===== */
.tech {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
}

.tech .section-title {
    color: white;
}

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

.tech-item {
    padding: 30px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.tech-item__icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.tech-item__title {
    font-size: 18px;
    margin-bottom: 12px;
}

.tech-item__text {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.6;
}

@media (max-width: 992px) {
    .tech__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .tech {
        padding: 60px 0;
    }
    
    .tech__grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Процесс работы ===== */
.process {
    padding: 100px 0;
    background-color: white;
}

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

.process-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 24px;
    top: 60px;
    bottom: -20px;
    width: 2px;
    background-color: var(--color-border);
}

.process-step__number {
    width: 50px;
    height: 50px;
    background-color: var(--color-accent);
    color: white;
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.process-step__content {
    flex: 1;
}

.process-step__title {
    font-size: 24px;
    margin-bottom: 8px;
}

.process-step__time {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.process-step__desc {
    color: var(--color-text-light);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .process {
        padding: 60px 0;
    }
    
    .process-step {
        gap: 20px;
    }
    
    .process-step__title {
        font-size: 20px;
    }
}

/* ===== FAQ ===== */
.faq {
    padding: 100px 0;
    background-color: var(--color-card-bg);
}

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

.faq-item {
    background-color: white;
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-item__question {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
}

.faq-item__icon {
    width: 24px;
    height: 24px;
    position: relative;
}

.faq-item__icon::before,
.faq-item__icon::after {
    content: '';
    position: absolute;
    background-color: var(--color-text);
    transition: var(--transition);
}

.faq-item__icon::before {
    width: 2px;
    height: 16px;
    top: 4px;
    left: 11px;
}

.faq-item__icon::after {
    width: 16px;
    height: 2px;
    top: 11px;
    left: 4px;
}

.faq-item.active .faq-item__icon::before {
    transform: scaleY(0);
}

.faq-item__answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active .faq-item__answer {
    padding: 0 24px 24px;
    max-height: 200px;
}

.faq-item__answer p {
    color: var(--color-text-light);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .faq {
        padding: 60px 0;
    }
}

/* ===== Контакты ===== */
.contact {
    padding: 100px 0;
    background-color: white;
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact__title {
    font-size: 48px;
    margin-bottom: 24px;
}

.contact__title--accent {
    color: var(--color-accent);
}

.contact__text {
    font-size: 18px;
    color: var(--color-text-light);
    margin-bottom: 40px;
}

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

.contact__item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact__label {
    font-weight: 600;
    min-width: 80px;
}

.contact__link {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact__form {
    background-color: var(--color-card-bg);
    padding: 40px;
    border-radius: 20px;
}

.form__group {
    margin-bottom: 20px;
}

.form__label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form__textarea {
    resize: vertical;
}

.form__agreement {
    margin-top: 16px;
    font-size: 12px;
    color: var(--color-text-light);
    text-align: center;
}

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

@media (max-width: 992px) {
    .contact__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact__title {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .contact {
        padding: 60px 0;
    }
    
    .contact__form {
        padding: 30px 20px;
    }
}

/* ===== Футер ===== */
.footer {
    background-color: #1a1a1a;
    color: white;
    padding: 60px 0 30px;
}

.footer__container {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer__copyright {
    margin-top: 16px;
    font-size: 14px;
    opacity: 0.6;
}

.footer__menu {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.footer__menu a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer__menu a:hover {
    opacity: 1;
}

.footer__social {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--color-accent);
}

.social-link img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

@media (max-width: 768px) {
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer__container {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer__menu {
        justify-content: center;
    }
    
    .footer__social {
        justify-content: center;
    }
}

/* ===== Попапы ===== */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup {
    background-color: white;
    border-radius: 20px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.popup__close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 32px;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-light);
    transition: var(--transition);
}

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

.popup__content {
    padding: 40px;
}

.popup__image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin-bottom: 24px;
}

.popup__title {
    font-size: 24px;
    margin-bottom: 16px;
}

.popup__tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.popup__description {
    line-height: 1.6;
}

.popup__description p {
    margin-bottom: 16px;
}

@media (max-width: 768px) {
    .popup__content {
        padding: 30px 20px;
    }
    
    .popup__title {
        font-size: 20px;
    }
}