html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: #181a1f;
    color: #F5F7FA;
}

a {
    text-decoration: none;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
}

p {
    color: #9AA4B2;
    margin: 1rem auto;
    line-height: 1.5;
}

.button-main {
    background-color: #4DDBC1;
    color: #181A1F;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: bold;
    margin: 0 8px;
}

.button-secondary {
    border: 1px solid #9AA4B2;
    color: #F5F7FA;
    padding: 12px 24px;
    border-radius: 12px;
    margin: 0 8px;
}

.lucide-icon {
    width: 80px;
    height: 80px;
    stroke: #4ddbc1;
    stroke-width: 1.5; /* было 2 по умолчанию — уменьшили */
    margin-bottom: 1rem;
}


.hero {
    display: flex;
    justify-content: space-between;
    padding: 4rem 2rem;
    background-color: #1f222a;
}

.hero-left {
    max-width: 50%;
    padding-right: 2rem;
}

.hero-right {
    max-width: 45%;
    position: relative;
}

.hero-bubble {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: #4DDBC1;
    border-radius: 50%;
    opacity: 0.2;
}

.hero-chart {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(77, 219, 193, 0.5);
}

.section {
    padding: 4rem 2rem;
    background-color: #22262f;
    color: #F5F7FA;
}

.section-dark {
    background-color: #181a1f;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #9AA4B2;
    margin-bottom: 2rem;
    max-width: 600px;
}

.icon-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
}

.footer {
    background-color: #121416;
    color: #6c7280;
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.875rem;
}


.nav-header {
    padding: 1.5rem 2rem;
    background-color: #181A1F;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: #9AA4B2;
    text-decoration: none;
}

.nav-links a:last-child {
    color: #F97316;
    font-weight: 600;
}

.logo-image {
    height: 40px;
}

.hero-section {
    padding: 6rem 2rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: auto;
}

.hero-text {
    max-width: 640px;
    flex: 1 1 300px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2rem;
    color: #F5F7FA;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.6;
    color: #9AA4B2;
    margin-bottom: 2rem;
}

.hero-button {
    display: inline-block;
    background-color: #F97316;
    color: #ffffff;
    padding: 14px 28px;
    font-weight: 600;
    border-radius: 12px;
    font-size: 1rem;
}

.hero-image {
    max-width: 680px;
    flex: 1 1 0px;
}

.chart-image {
    width: 100%;
}

.steps-section {
    padding: 4rem 2rem;
    background-color: #1f2228;
    text-align: center;
}


.section-divider {
    width: 60px;
    height: 4px;
    background-color: #F97316;
    margin: 0 auto 1rem;
}

.steps-container {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    max-width: 1280px;
    margin: auto;
}

.steps-container > .icon-block {
    flex: 1 1 200px;
    max-width: 33%;
}

.steps-container img {
    display: block;
    margin: 0 auto 1rem auto;
    height: 160px;
    width: 160px;
}

.use-cases-section {
    padding: 4rem 2rem;
    background-color: #181A1F;
    text-align: center;
}

.use-cases-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1280px;
    margin: auto;
}

.use-case {
    background-color: #1f2228;
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: left;
    transition: background-color 0.3s, transform 0.3s;
}

.use-case img {
    display: block;
    margin: 0 auto 1rem auto;
    height: 240px;
    width: 240px;
}

.use-case:hover {
    background-color: #2a2d34;
    transform: translateY(-4px);
}

.use-case .lucide-icon {
    display: block;
    margin: 0 auto 1rem auto;
    width: 160px;
    height: 160px;
    stroke: #4ddbc1;
    stroke-width: 1; /* было 2 по умолчанию — уменьшили */
    margin-bottom: 1rem;
}

.features-section {
    padding: 4rem 2rem;
    background-color: #1f2228;
    text-align: center;
}

.features-container {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    max-width: 1280px;
    margin: auto;
}

.feature {
    max-width: 220px;
    flex: 1 1 300px;
}

.why-section {
    background-color: #181A1F;
    padding: 4rem 2rem;
}
.why-section .section-title {
    text-align: center;
}

.why-convenient-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    max-width: 1280px;
    margin: auto;
    gap: 3rem;
}

.why-convenient-image {
    flex: 1 1 480px;
    text-align: center;
}

.why-convenient-image img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
}

.why-convenient-content {
    flex: 1 1 480px;
}

.why-convenient-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #F5F7FA;
}

.why-convenient-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.why-convenient-content li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.why-convenient-content .icon {
    background-color: #4DDBC1;
    color: #181A1F;
    font-weight: bold;
    font-size: 1.2rem;
    border-radius: 12px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.why-convenient-content strong {
    color: #F5F7FA;
    display: block;
    margin-bottom: 0.25rem;
}

.why-convenient-content p {
    color: #9AA4B2;
    font-size: 0.95rem;
    margin: 0;
}

.why-convenient-content .why-icon {
    width: 40px;
    height: 40px;
    stroke: #4DDBC1;
    stroke-width: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .why-convenient-container {
        flex-direction: column;
    }

    .why-convenient-image,
    .why-convenient-content {
        flex: 1 1 100%;
        text-align: center;
    }

    .why-convenient-content li {
        text-align: left;
        justify-content: flex-start;
    }
}

.compare-section {
    padding: 4rem 2rem;
    background-color: #181A1F;
    color: #F5F7FA;
    text-align: center;
}

.compare-table {
    margin: 2rem auto 0;
    max-width: 960px;
    border-radius: 12px;
    overflow: hidden;
    background-color: #1F2228;
    display: grid;
    grid-template-columns: 1.5fr 1.5fr 1.5fr;
}

.compare-header {
    display: contents;
}

.compare-header div {
    background-color: #1F2228;
    padding: 1.5rem;
    font-weight: 600;
    border-bottom: 1px solid #2a2e34; /* менее контрастная граница */
    text-align: left;
    font-size: 1.5rem;
}

.compare-row {
    display: contents;
}

.compare-row div {
    padding: 1.5rem;
    border-bottom: 1px solid #2a2e34;
    text-align: left;
    background-color: #1F2228;
    vertical-align: top;
    line-height: 1.5;
}

.compare-row div:nth-child(1) {
    padding-left: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.compare-row div:nth-child(3) {
    background-color: #165E54;
    color: #F5F7FA;
    border-bottom: 1px solid #114941; /* более мягкая граница */
}

.compare-header div:nth-child(3) {
    background-color: #165E54;
    color: #F5F7FA;
}

.compare-label {
    font-weight: 600;
    color: #F5F7FA;
    line-height: 1.5;
}

.compare-label .lucide-icon {
    width: 24px;
    height: 24px;
    stroke-width: 2.5;
    flex-shrink: 0;
    margin: 0;
    padding-right: 1rem;
}

.compare-label .lucide-icon[data-lucide="x"] {
    stroke: #F97316;
}

.compare-label .lucide-icon[data-lucide="check"] {
    stroke: #4DDBC1;
}

.tech-section {
    padding: 4rem 2rem;
    background-color: #181A1F;
    text-align: center;
}
.tech-container img {
    display: block;
    margin: 0 auto 1rem auto;
    height: 130px;
    width: auto;
}

.tech-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem 2rem;
    max-width: 960px;
    margin: 0 auto;
    padding-top: 2rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
}

@media (max-width: 1024px) {
    .tech-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .tech-container {
        grid-template-columns: 1fr;
    }
}

.community-section {
    padding: 4rem 2rem;
    background-color: #1f2228;
    text-align: center;
}

.community-container {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    max-width: 960px;
    margin: auto;
}

.community-item {
    max-width: 220px;
}


.footer {
    background-color: #121416;
    color: #6c7280;
    padding: 2.5rem 1rem;
    font-size: 0.875rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    max-width: 1280px;
    margin: auto;
    gap: 2rem;
}

.footer-logo {
    width: 60px;
    margin-bottom: 1rem;
}

.footer-description {
    font-size: 0.95rem;
    color: #9AA4B2;
}

.footer-links a, .footer-contact a {
    color: #4DDBC1;
    text-decoration: none;
}

.footer-contact i {
    margin-right: 0.5rem;
    vertical-align: middle;
    stroke: #4DDBC1;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.75rem;
    color: #6c7280;
}

/* Адаптивные стили */

/* Мобильное меню */
.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: #F5F7FA;
}

/* Медиа-запросы для адаптивности */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .tech-item, .community-item, .feature, .use-case {
        flex: 1 1 40%;
    }
    
    .steps-container > .icon-block {
        flex: 1 1 40%;
    }
}

@media (max-width: 768px) {
    .nav-header {
        padding: 1rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: #181A1F;
        flex-direction: column;
        padding: 2rem;
        transition: right 0.3s ease;
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
    }

    .nav-links a {
        font-size: 1.2rem;
        padding: 1rem 0;
        border-bottom: 1px solid rgba(154, 164, 178, 0.1);
    }

    .hero-section {
        padding: 2rem 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .hero-text {
        text-align: center;
        padding: 0 1rem;
        order: 2;
        margin-top: 0;
    }

    .hero-image {
        padding: 0 1rem;
        order: 1;
        margin-bottom: 0;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-description {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .hero-button {
        width: auto;
        min-width: 200px;
        max-width: 100%;
        text-align: center;
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
        white-space: nowrap;
        display: inline-block;
        margin: 0 auto;
    }

    .steps-container, .use-cases-container, .tech-container {
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .steps-container > .icon-block,
    .use-cases-container > .use-case,
    .tech-container > .tech-item {
        max-width: 100%;
        padding: 1.5rem;
    }

    .compare-table {
        margin: 0 1rem;
        font-size: 0.9rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        background: none;
    }

    .compare-header {
        display: none;
    }

    .compare-row {
        display: flex;
        flex-direction: column;
        background-color: #1f2228;
        border-radius: 12px;
        overflow: hidden;
    }

    .compare-label {
        background-color: #1f2228;
        padding: 1rem;
        border-bottom: 1px solid #2a2e34;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .compare-row div {
        padding: 1rem;
        border: none;
        background: none;
        position: relative;
    }

    .compare-row div:nth-child(2) {
        border-bottom: 1px solid #2a2e34;
        color: #9AA4B2;
        padding-top: 2rem;
    }

    .compare-row div:nth-child(2)::before {
        content: "ChatGPT";
        position: absolute;
        top: 0.5rem;
        left: 1rem;
        font-size: 0.8rem;
        font-weight: 600;
        color: #F97316;
    }

    .compare-row div:nth-child(3) {
        background-color: #165E54;
        color: #F5F7FA;
        border-radius: 0 0 12px 12px;
        padding-top: 2rem;
    }

    .compare-row div:nth-child(3)::before {
        content: "Brain4BI";
        position: absolute;
        top: 0.5rem;
        left: 1rem;
        font-size: 0.8rem;
        font-weight: 600;
        color: #4DDBC1;
    }

    .compare-label .lucide-icon {
        width: 20px;
        height: 20px;
        margin: 0;
    }

    .why-convenient-container {
        padding: 0 1rem;
    }

    .why-convenient-content li {
        padding: 1rem;
        margin-bottom: 1rem;
        background-color: #1f2228;
        border-radius: 8px;
    }

    .why-icon {
        width: 24px;
        height: 24px;
        margin-right: 0.5rem;
    }

    .use-cases-container {
        grid-template-columns: 1fr; /* Одна колонка на мобильных */
        gap: 1rem;
        padding: 0 1rem;
    }

    .use-case {
        padding: 1.5rem;
    }

    .use-case img {
        height: 180px; /* Уменьшаем размер изображений */
        width: 180px;
    }

    .use-case h3 {
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
    }

    .use-case p {
        font-size: 0.95rem;
        margin: 0;
    }

    .steps-section,
    .use-cases-section,
    .why-section,
    .compare-section,
    .tech-section {
        padding: 2rem 1rem; /* Уменьшаем с 4rem до 2rem */
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: 0.75rem; /* Уменьшаем отступ после заголовка */
    }

    .section-divider {
        margin-bottom: 0.75rem; /* Уменьшаем отступ после разделителя */
    }
}

@media (max-width: 480px) {
    .mobile-menu-toggle {
        display: block;
        position: fixed;
        top: 1rem;
        right: 1rem;
        z-index: 1001;
        background: none;
        border: none;
        padding: 0.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .lucide-icon {
        width: 24px;
        height: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-links,
    .footer-contact {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .footer-contact a {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }

    .hero-button {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

/* Добавляем плавные переходы */
.nav-links,
.hero-section,
.steps-container,
.use-cases-container,
.tech-container,
.compare-table,
.why-convenient-container {
    transition: all 0.3s ease;
}

/* Улучшаем читаемость текста */
@media (max-width: 768px) {
    p {
        font-size: 1rem;
        line-height: 1.6;
    }

    h3 {
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
    }
}

/* Оптимизация изображений */
@media (max-width: 768px) {
    .chart-image,
    .use-case img,
    .tech-item img {
        max-width: 100%;
        height: auto;
    }
}