:root {
    --text-color: #222222;
    --primary-color: #388bfd;
    --primary-hover-color: #006aff;
    --transition: 0.3s;
    --border-color: rgb(211 211 211 / 60%);
    --border-radius: 40px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

a,
li,
button {
    -webkit-tap-highlight-color: transparent;
}

html::selection {
    color: white;
    background-color: var(--primary-color);
}

html {
    color: var(--text-color);
}

header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
    background: rgb(255 255 255 / 40%);
}

header nav ul {
    display: flex;
}

header nav ul li {
    cursor: pointer;
    position: relative;
}

header nav ul li a {
    font-size: 18px;
    padding: 14px 20px;
    display: block;
}

header nav ul li::after {
    pointer-events: none;
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 4px;
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

header nav li:hover::after,
header nav li.active::after {
    left: 20px;
    width: calc(100% - 40px);
}

h2,
h3 {
    font-weight: 500;
}

li {
    list-style-type: none;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

footer .mobile {
    display: none;
    text-align: center;
    padding-block: 20px;
    border-top: 1px solid var(--border-color);
}

footer .desktop {
    display: flex;
    justify-content: space-between;
    padding-block: 20px;
    border-top: 1px solid var(--border-color);
}

footer a:hover {
    color: var(--primary-hover-color);
}

footer .slang h3 {
    display: inline-block;
}

footer .col {
    max-width: 300px;
    width: 100%;
}

footer .title {
    padding-bottom: 10px;
}

.container {
    max-width: 1024px;
    padding-inline: 20px;
    margin-inline: auto;
}

.hero {
    text-align: center;
    margin-block: 50px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 2rem;
    background: linear-gradient(90deg, #58a6ff, #a371f7);
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    font-weight: 400;
    opacity: 0.8;
}

.btn-hero {
    display: inline-block;
    text-decoration: none;
    color: white;
    font-size: 24px;
    font-weight: 500;
    border-radius: 20px;
    padding: 16px 24px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.btn-hero:hover {
    color: white;
}

.btn-hero:active {
    scale: 0.98;
}

section {
    padding-block: 100px;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 20px;
    justify-items: center;
}

.feature-card {
    text-align: center;
    max-width: 500px;
    padding: 28px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: rgb(252 252 252);
    transition: var(--transition);
}

@starting-style {
    .feature-card {
        opacity: 0;
        translate: 0 10px;
    }
}

.feature-card:hover {
    border-color: var(--primary-color);
}

.feature-card:hover .icon svg {
    fill: var(--primary-color);
}

.feature-card .icon {
    margin-bottom: 20px;
}

.feature-card .icon svg {
    width: 48px;
    height: 48px;
    transition: var(--transition);
}

.feature-card h3 {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.feature-card p {
    line-height: 1.4;
}

.opensource-content {
    padding: 28px;
    margin-inline: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: rgb(252 252 252);
}

.opensource p {
    line-height: 1.4;
    text-wrap: balance;
    text-align: center;
}

.opensource-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 2rem;
}

.opensource-buttons a {
    display: inline-block;
    text-align: center;
    text-decoration: none;
    font-weight: 600;
    padding: 14px 28px;
    color: var(--primary-color);
    border-radius: 20px;
    border: 2px solid var(--primary-color);
    transition: var(--transition);
}

.opensource-buttons a:hover {
    background-color: var(--primary-color);
    color: white;
}

@media screen and (width <=768px) {
    .hero h1 {
        font-size: 28px;
        line-height: 34px;
        margin-bottom: 0;
    }

    .hero p {
        font-size: 16px;
        margin-block: 16px 32px;
    }

    .hero .btn-hero {
        font-size: 18px;
    }

    .btn-hero {
        display: block;
    }

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

    .opensource-content {
        max-width: 500px;
    }

    .opensource-buttons {
        flex-direction: column;
    }

    .opensource-buttons a {
        width: 100%;
    }

    .desktop {
        display: none !important;
    }

    .mobile {
        display: block !important;
    }
}