:root {
    --horizontal-padding: 70px;
    --sections-spacing: 150px;
    --max-width: 1300px;
    --color-primary: #EC6B26;
    --color-secondary: #1A2224;
    --color-bg: #F3F4F6;
    --color-text: #1A2224;
    --color-text-gray: #4B5563;
    --color-black: #1A2224;
    --color-gray-2: #9CA3AF;
    --letter-spacing-m: 0.03rem;
    --filter-primary: brightness(0) saturate(100%) invert(69%) sepia(89%) saturate(4301%) hue-rotate(345deg) brightness(95%) contrast(94%);
    --filter-white: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(0%) hue-rotate(336deg) brightness(99%) contrast(103%);
}

@media screen and (max-width: 1024px) {
    :root {
        --horizontal-padding: 40px;
        --sections-spacing: 125px;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --horizontal-padding: 15px;
        --sections-spacing: 100px;
    }
}

* {
    padding: 0;
    margin: 0;
}
html {
    font-size: 16px;
}

body {
    background: white;
    font-family: Montserrat, sans-serif;
    font-weight: 400;
    color: var(--color-text);
    overflow-x: hidden;
    width: 100%;
}

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

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

h2 {
    font-weight: 600;
    font-size: 36px;
    line-height: 1.2;
}

@media screen and (max-width: 1024px) {
    h2 {
        font-size: 32px;
    }
}

@media screen and (max-width: 768px) {
    h2 {
        font-size: 24px;
    }
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    background: white;
    height: 92px;
    box-sizing: border-box;
    padding: 16px var(--horizontal-padding);
    transition: 0.3s;
}

header.scrolled {
    box-shadow: 0 4px 6px 0 rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

header .logo {
    height: 58px;
}

@media screen and (max-width: 768px) {
    header {
        height: 74px;
    }

    header .logo {
        height: 42px;
    }
}

/* Burger menu button */
.burger-menu-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    transition: opacity 0.2s ease;
}

.burger-menu-button:active {
    opacity: 0.7;
}

.burger-menu-button img {
    width: 32px;
    height: 32px;
}

/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -360px;
    width: 270px;
    height: 100vh;
    background: white;
    z-index: 1000;
    padding: 24px;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    transform: translateX(-360px);
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.mobile-menu-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 48px;
}

.mobile-menu-close {
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    position: relative;
    padding: 0;
}

.mobile-nav {
    flex: 1;
}

.mobile-nav h3 {
    font-weight: 600;
    font-size: 1.5rem;
    line-height: 1.2;
    margin-bottom: 24px;
    margin-top: 80px;
}

.mobile-nav p {
    font-size: 1rem;
    line-height: 1.4;
    margin-bottom: 40px;
    color: var(--color-text-gray);
}

.mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav ul li {
    margin-bottom: 30px;
}

.mobile-nav ul li a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 500;
    transition: color 0.2s ease;
    display: block;
    letter-spacing: 0.0225rem;
}

.mobile-nav ul li a:hover {
    color: var(--color-primary);
}

.mobile-menu-footer {
    margin-top: auto;
}

.mobile-contacts {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.mobile-contacts .contacts-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.mobile-contacts .contacts-row a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    transition: color 0.2s ease;
}

.mobile-contacts .contacts-row img {
    width: 24px;
    height: 24px;
}

.mobile-menu-footer {
    font-size: 0.875rem;
    color: var(--color-gray-2);
    font-weight: 400;
    line-height: 1.4;
}

.mobile-right-header {
    display: none;
}

.header-phone-link {
    display: flex;
    width: 40px;
    height: 40px;
    border-radius: 100%;
    background: var(--color-primary);
    align-items: center;
    justify-content: center;
    transition: all 0.1s ease;
}

.header-phone-link img {
    width: 24px;
    height: 24px;
    filter: var(--filter-white);
}

@media screen and (max-width: 1024px) {
    .desktop-nav {
        display: none;
    }

    .mobile-right-header {
        display: flex;
        gap: 12px;
        align-items: center;
    }
}

.navigation-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 40px;
}

.navigation-list li .nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.1s ease;
}

.navigation-list li .nav-link:hover {
    color: var(--color-primary);
}

.navigation-list li .nav-link:active {
    opacity: 0.6;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    color: white;
    padding: 8px 8px 8px 20px;
    border-radius: 38px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.1s ease;
}

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

.cta-button:active {
    opacity: 0.6;
}

.cta-button .cta-button-arrow {
    display: inline-flex;
    padding: 4px;
    background: white;
    border-radius: 100%;
    transition: all 0.1s ease;
}

.cta-button:hover .cta-button-arrow {
    background: var(--color-primary);
}

.cta-button .cta-button-arrow img {
    transition: all 0.1s ease;
    filter: var(--filter-primary);
}

.cta-button:hover .cta-button-arrow img {
    filter: var(--filter-white);
}

main {
    padding-top: 92px;
}

@media screen and (max-width: 768px) {
    main {
        padding-top: 74px;
    }
}


/* Main section */
.main-section {
    padding: 0 var(--horizontal-padding);
}

.main-video-wrapper {
    overflow: hidden;
    border-radius: 40px;
    clip-path: url(#clip-corner);
    width: 100%;
    aspect-ratio: 13/7;
    position: relative;
}

.main-section video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: blur(1px);
}

.main-section-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: absolute;
    inset: 0;
    box-sizing: border-box;
    padding: 80px;
    background: linear-gradient(269.62deg, rgba(0, 0, 0, 0) 31.88%, rgba(0, 0, 0, 0.428788) 64.45%, rgba(0, 0, 0, 0.9) 100.24%);
    color: white;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-section-content h1 {
    font-size: 3.5rem;
    max-width: 625px;
    font-weight: 800;
    line-height: 1.2;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.main-section-content p {
    font-size: 1.375rem;
    letter-spacing: var(--letter-spacing-m);
    font-weight: 300;
    padding-top: 24px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
    animation-delay: 0.3s; /* Delay for sequential appearance */
}

.main-section-container {
    position: relative;
}

@keyframes floatUpDown {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(5px); /* піднімається */
    }
    100% {
        transform: translateY(0); /* повертається */
    }
}

.scroll-down-button {
    position: absolute;
    right: 0;
    bottom: 0;
    background: var(--color-primary);
    width: 56px;
    height: 56px;
    border-radius: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.1s ease;
    border: 1px solid var(--color-primary);
    user-select: none;
    animation: floatUpDown 2s ease-in-out infinite;
}

.scroll-down-button:hover {
    background: white;
    border: 1px solid var(--color-primary);
}

.scroll-down-button img {
    transition: all 0.1s ease;
    filter: var(--filter-white);
}

.scroll-down-button:hover img {
    filter: var(--filter-primary);
}

.scroll-down-button:active {
    opacity: 0.6;
}

@media screen and (max-width: 1300px) {
    .scroll-down-button {
        width: 50px;
        height: 50px;
    }
}

@media screen and (max-width: 1024px) {
    .scroll-down-button {
        width: 40px;
        height: 40px;
    }
}

@media screen and (max-width: 900px) {
    .scroll-down-button {
        display: none;
    }

    .main-video-wrapper {
        clip-path: none;
        border-radius: 16px;
    }

    .main-section-content {
        padding: 24px;
    }

    .main-section-content h1 {
        font-size: 2.5rem;
    }

    .main-section-content p {
        font-size: 1.125rem;
    }
}

@media screen and (max-width: 768px) {
    .main-video-wrapper {
        aspect-ratio: auto;
        height: 430px;
    }
    .main-section-content {
        padding: 18px;
    }

    .main-section-content h1 {
        font-size: 2.25rem;
    }

    .main-section-content p {
        font-size: 1.125rem;
    }
}

/* About section */
.about-section-container {
    padding: var(--sections-spacing) var(--horizontal-padding);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.about-section-container h2 {
    margin-bottom: 24px;
}

.about-section-container p {
    max-width: 640px;
    line-height: 1.4;
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--color-text-gray);
}

@media screen and (max-width: 768px) {
    .about-section-container p {
        font-size: 1rem;
    }
}

/* Stages */
.stages-section-container {
    padding: 0 var(--horizontal-padding);
}

.stages-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 52px;
    gap: 24px;
}

.stages-header h2 {
    max-width: 500px;
}

.stages-header p {
    max-width: 600px;
    text-align: right;
    color: var(--color-text-gray);
    font-size: 1.125rem;
    line-height: 1.4;
    font-weight: 400;
    letter-spacing: var(--letter-spacing-m);
}

.stages-section {
    margin-bottom: var(--sections-spacing);
}

.stage-item {
    display: flex;
    height: 310px;
    flex-direction: column;
    justify-content: space-between;
    background: var(--color-bg);
    padding: 24px 20px 32px 20px;
    border-radius: 16px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.stage-item .stage-item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.stage-item .stage-item-head img {
    width: 40px;
    height: 40px;
    filter: var(--filter-primary);
    transition: all 0.1s ease;
}

.stage-item .stage-item-head span {
    font-size: 1.375rem;
    font-weight: 400;
    line-height: 1.45;
    letter-spacing: var(--letter-spacing-m);
    color: var(--color-text-gray);
    transition: all 0.2s ease;
}

.stage-item .stage-item-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
    letter-spacing: var(--letter-spacing-m);
    text-transform: uppercase;
    transition: all 0.2s ease;
}

.stage-item .stage-item-content p {
    font-size: 0.875rem;
    line-height: 1.4;
    color: var(--color-text-gray);
    font-weight: 400;
    transition: all 0.2s ease;
}

.stage-item:hover {
    background: var(--color-black);
}

.stage-item:hover .stage-item-head img {
    filter: var(--filter-white);
}

.stage-item:hover .stage-item-head span {
    color: white;
}

.stage-item:hover .stage-item-content h3 {
    color: white;
    font-weight: 700;
}

.stage-item:hover .stage-item-content p {
    color: var(--color-gray-2);
    font-weight: 500;
}

.stages-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 20px;
}

.stages-image {
    width: 100%;
    height: 100%;
    grid-column-start: 3;
    grid-column-end: 5;
    object-fit: cover;
    border-radius: 16px;
}

@media screen and (max-width: 1024px) {
    .stages-image {
        display: none;
    }

    .stages-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .stages-header p {
        font-size: 1rem;
    }

    .stage-item {
        height: 200px;
        aspect-ratio: unset;
        pointer-events: none;
    }
}

@media screen and (max-width: 768px) {
    .stages-list {
        grid-template-columns: repeat(1, 1fr);
        grid-gap: 16px;
    }

    .stages-header {
        flex-direction: column;
        align-items: start;
        margin-bottom: 32px;
    }

    .stages-header p {
        text-align: left;
    }

    .stage-item {
        height: auto;
        aspect-ratio: unset;
    }

    .stage-item .stage-item-content h3 {
        font-size: 1.25rem;
        margin-bottom: 8px;
    }
}

/* Key Areas */
.key-areas-section {
    margin-bottom: var(--sections-spacing);
}

.key-areas-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 56px;
    gap: 24px;
}

.key-areas-container {
    padding: 0 var(--horizontal-padding);
}

.key-areas-header h2 {
    max-width: 640px;
}

.key-areas-header p {
    max-width: 430px;
    color: var(--color-text-gray);
    font-weight: 400;
    font-size: 1.125rem;
    line-height: 1.4;
    letter-spacing: var(--letter-spacing-m);
}

.key-areas-accordion .key-area-header {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    position: relative;
    gap: 24px;
}

.key-area-header::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    width: 32px;
    height: 32px;
    background: url(/assets/arrow-up-right.svg) no-repeat center;
    transform: rotate(90deg);
    transition: all 0.2s ease;
}

.key-area-header-wrapper {
    padding: 0 var(--horizontal-padding);
}

.key-areas-accordion .ac-trigger {
    padding: 32px 0;
    transition: all 0.2s ease;
}

.key-areas-accordion .ac.is-active .ac-trigger {
    padding-bottom: 12px;
}

.key-areas-accordion .ac-header::after {
    display: none;
}

.key-areas-accordion .ac {
    border-top: 1px solid #E5E7EB;
    border-bottom: 1px solid #E5E7EB;
    transition: all 0.2s ease;
    margin-bottom: -1px;
}

.key-area-header h3 {
    max-width: 640px;
    width: 100%;
    font-family: Montserrat, sans-serif;
    text-transform: uppercase;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
    user-select: none;
}

.key-area-header span {
    font-family: Montserrat, sans-serif;
    font-weight: 500;
    font-size: 1.25rem;
    line-height: 1.4;
    letter-spacing: var(--letter-spacing-m);
    color: var(--color-text-gray);
    user-select: none;
}

.key-areas-accordion .ac .ac-panel {
    padding: 0 var(--horizontal-padding);
}

.key-area-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: flex-end;
}

.key-area-content::before {
    content: '';
    width: 52px;
}

.key-area-content p {
    max-width: 640px;
    width: 100%;
    color: rgba(0,0,0,0);
    padding-bottom: 32px;
    font-size: 0.875rem;
    font-weight: 400;
    font-family: Montserrat, sans-serif;
    letter-spacing: var(--letter-spacing-m);
    line-height: 1.4;
    user-select: none;
}

.key-areas-accordion .ac.is-active .key-area-content p {
    color: #D7D7D7;
}

.key-areas-accordion .ac.is-active .key-area-header::after {
    transform: rotate(0deg);
    filter: var(--filter-white);
}

.key-areas-accordion .ac.is-active {
    background: #1A2224;
    border-radius: 16px;
}

.key-areas-accordion .ac.is-active .key-area-header h3 {
    color: white;
}

.key-areas-accordion .ac.is-active .key-area-header span {
    color: white;
}

@media screen and (max-width: 1024px) {
    .key-areas-header {
        flex-direction: column-reverse;
    }

    .key-areas-header p {
        font-size: 1rem;
    }

    .key-area-header h3 {
        font-size: 1.25rem;
    }
}

/* Projects */
.projects-section {
    margin-bottom: var(--sections-spacing);
}

.projects-header {
    padding: 0 var(--horizontal-padding);
}

.projects-swiper .swiper-slide {
    width: 310px;
    height: 360px;
    border-radius: 16px;
}

.projects-swiper .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
}

.projects-swiper .swiper-slide.first {
    margin-left: max(var(--horizontal-padding), calc(100vw / 2 - 1300px / 2));
}

.projects-swiper .swiper-slide.last {
    margin-right: max(var(--horizontal-padding), calc(100vw / 2 - 1300px / 2));
}

.projects-section h2 {
    margin-bottom: 56px;
}

.projects-swiper .swiper-nav-button {
    top: 50%;
    transform: translateY(-50%);
    width: 76px;
    height: 76px;
    border-radius: 100%;
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    transition: all 0.2s ease;
}

.projects-swiper .swiper-nav-button:hover {
    border: 2px solid var(--color-primary);
    background: white;
    opacity: 0.9;
}

.projects-swiper .swiper-nav-button:active {
    opacity: 0.8;
}

.projects-swiper .swiper-nav-button:hover::after {
    filter: var(--filter-primary);
}

.projects-swiper .swiper-nav-button::after {
    content: '';
    background: url(/assets/arrow-down.svg) no-repeat center;
    width: 80px;
    height: 80px;
    filter: var(--filter-white);

}

.projects-swiper .swiper-nav-button.swiper-button-disabled {
    display: none;
}

.projects-swiper .swiper-button-next {
    right: max(70px, calc(100vw / 2 - 1300px / 2) + 2px);
}

.projects-swiper .swiper-button-next::after {
    transform: rotate(-90deg);
}

.projects-swiper .swiper-button-prev {
    left: max(70px, calc(100vw / 2 - 1300px / 2) + 2px);
}

.projects-swiper .swiper-button-prev::after {
    transform: rotate(90deg);
}

@media screen and (max-width: 1024px) {
    .projects-swiper .swiper-nav-button {
        display: none;
    }
}

@media screen and (max-width: 768px) {
    .projects-section h2 {
        margin-bottom: 32px;
    }
}

/* Partners */
.partners-head {
    display: flex;
    justify-content: space-between;
    margin-bottom: 56px;
    gap: 24px;
}

.partners-head p {
    font-size: 1.125rem;
    line-height: 1.4;
    letter-spacing: var(--letter-spacing-m);
    color: var(--color-text-gray);
}

.partners-section {
    margin-bottom: var(--sections-spacing);
    padding: 0 var(--horizontal-padding);
}

.partners-grid {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.partners-grid .partner-item {
    max-width: 310px;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: center;
    justify-content: center;
    background: #F3F4F6;
    text-decoration: none;
    padding: 24px;
    border-radius: 16px;
    transition: all 0.2s ease;
}

.partners-grid .partner-item img {
    transition: all 0.2s ease;
    height: 45px;
}

.partners-grid .partner-item span {
    color: var(--color-text);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.partners-grid .partner-item:hover {
    background: var(--color-black);
    color: white;
}

.partners-grid .partner-item:hover span {
    color: white;
}

.partners-grid .partner-item:hover img {
    filter: var(--filter-white);
}

.partners-grid .partner-item:hover img.disable-filter {
    filter: none;
}

.partners-grid .partner-item:active {
    opacity: 0.6;
}

@media screen and (max-width: 768px) {
    .partners-head {
        flex-direction: column-reverse;
        margin-bottom: 32px;
    }

    .partners-grid .partner-item {
        width: auto;
        min-width: 170px;
    }

    .partners-grid .partner-item img {
        max-height: 30px;
        height: auto;
    }

    .partners-grid .partner-item span {
        font-size: 0.875rem;
    }
}

/* Contacts */
.contacts-section {
    background: var(--color-black);
    color: white;
}

.contacts-container {
    padding: 80px var(--horizontal-padding);
}

.contacts-container .contacts-head {
    text-align: center;
}

.contacts-container .contacts-head p {
    font-size: 1.125rem;
    line-height: 1.4;
    letter-spacing: var(--letter-spacing-m);
    margin-top: 24px;
}

.contacts-columns {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 56px;
    gap: 75px;
}

.contacts-column h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 32px;
    line-height: 1.4;
}

.contacts-column .contacts-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 24px;
}

.contacts-column p, .contacts-column a {
    color: white;
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.4;
    text-decoration: none;
    transition: all 0.2s ease;
}

.contacts-column a:hover {
    color: var(--color-primary);
}

.contacts-column a:active {
    opacity: 0.6;
}


.contacts-column .follow-us-header {
    margin-top: 48px;
}

.contacts-column .social-icons {
    display: flex;
    gap: 18px;
}

.contacts-column .social-icons a {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 100%;
    background: var(--color-primary);
    transition: all 0.2s ease;
    border: 1px solid var(--color-primary);
}

.contacts-column .social-icons a img {
    height: 18px;
}

.contacts-column .social-icons a:hover {
    background: transparent;
}

.contacts-column .social-icons a:active {
    opacity: 0.6;
}

.contacts-map-column {
    display: block;
    flex: 1;
    background: #363A3F;
    border-radius: 12px;
    padding: 24px;
    box-sizing: border-box;
}

.contacts-map-column iframe {
    border-radius: 8px;
}

@media screen and (max-width: 768px) {
    .contacts-columns {
        flex-direction: column-reverse;
    }

    .contacts-columns .contacts-map-column {
        width: 100%;
    }
}

footer {
    background: var(--color-black);
    color: var(--color-gray-2);
    text-align: center;
    padding: 32px var(--horizontal-padding);
    border-top: 1px solid #373737;
}