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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Inter, sans-serif;
    background: #f5f7fb;
    color: #222;
}



.container {
    display: grid;
    grid-template-columns: 260px 1fr 260px;
    gap: 30px;
    max-width: 1500px;
    margin: auto;
    padding: 30px;
}



aside {
    background: #fff;
    border-radius: 18px;
    padding: 25px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .06);
    height: fit-content;
    position: sticky;
    top: 25px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.logo-box {
    width: 70px;
    height: 70px;
    background: #111;
    color: #fff;
    font-size: 42px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
}

.logo h2 {
    font-size: 26px;
}

.logo p {
    color: #777;
}

nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

nav a {
    text-decoration: none;
    color: #444;
    padding: 12px 15px;
    border-radius: 10px;
    transition: .25s;
    font-weight: 500;
}

nav a:hover {
    background: #4f7cff;
    color: #fff;
}

nav a.active {
    background: #4f7cff;
    color: #fff;
}



main {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.tab {
    display: none;
    animation: fade .25s ease;
}

.tab.active {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

@keyframes fade {

    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: none;
    }

}



.hero {
    background: #fff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .06);
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 12px;
}

.hero p {
    font-size: 18px;
    color: #666;
    line-height: 1.7;
    max-width: 850px;
}



.downloads {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    background: #fafafa;
    border: 1px solid #ececec;
    border-radius: 16px;
    padding: 24px;
    transition: .25s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, .08);
}

.card h3 {
    margin-bottom: 12px;
}

.card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

button {
    width: 100%;
    border: none;
    border-radius: 12px;
    padding: 14px;
    cursor: pointer;
    font-weight: 700;
    color: #fff;
    font-size: 15px;
    background: linear-gradient(135deg, #4f7cff, #6d8dff);
    transition: .25s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 124, 255, .35);
}



.section {
    background: #fff;
    border-radius: 20px;
    padding: 35px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .06);
}

.section h2 {
    font-size: 30px;
    margin-bottom: 25px;
}

.section h3 {
    margin-bottom: 18px;
}

.section p {
    color: #666;
    line-height: 1.8;
}



.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.feature {
    background: #f7f9fd;
    border-radius: 16px;
    padding: 22px;
    border: 1px solid #edf1f8;
}

.feature h4 {
    margin-bottom: 12px;
    font-size: 18px;
}

.feature p {
    margin: 0;
}



.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}



.method {
    background: #fafafa;
    border-radius: 16px;
    padding: 22px;
    border: 1px solid #ececec;
}

.method h4 {
    font-size: 22px;
    color: #4f7cff;
    margin-bottom: 10px;
}

.method p {
    margin-bottom: 0;
}



.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag {
    padding: 12px 18px;
    border-radius: 30px;
    background: #edf3ff;
    color: #4f7cff;
    font-weight: 600;
}



.timeline {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.timeline-item {
    position: relative;
    padding-left: 28px;
}

.timeline-item::before {

    content: "";
    position: absolute;
    left: 0;
    top: 8px;

    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #4f7cff;

}

.timeline-item h4 {
    margin-bottom: 6px;
}

.timeline-item p {
    margin: 0;
}



.sdk-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.sdk-card {
    background: #fafafa;
    border: 1px solid #ececec;
    border-radius: 16px;
    padding: 25px;
}

.sdk-card h3 {
    font-size: 30px;
    color: #4f7cff;
    margin-bottom: 10px;
}

.sdk-card span {
    display: block;
    color: #777;
    margin-bottom: 20px;
}



.right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.version {
    background: #fff;
    border-radius: 16px;
    padding: 22px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .06);
}

.version h3 {
    margin-bottom: 18px;
}

.release {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.release:last-child {
    border: none;
}



footer {
    text-align: center;
    padding: 40px;
    color: #888;
}



@media(max-width:1100px) {

    .container {

        grid-template-columns: 1fr;

    }

    aside {

        position: static;

    }

    .right {

        order: -1;

    }

}

@media(max-width:768px) {

    .hero {

        padding: 30px;

    }

    .hero h1 {

        font-size: 34px;

    }

    .section {

        padding: 25px;

    }

}