:root {
    --background: #2f2f34;
    --background-dark: #252529;
    --card: #34343a;
    --text: #f5f5f5;
    --muted: #c4c4c4;
    --primary: #e8a43a;
    --border: rgba(255, 255, 255, .08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);
    font-family: 'Inter', sans-serif;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(47, 47, 52, .95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.navbar {
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 52px;
}

nav {
    display: flex;
    gap: 40px;
}

nav a {
    text-decoration: none;
    color: white;
    font-weight: 500;
}

nav a.active {
    color: var(--primary);
}

.hero {
    padding: 120px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero h1 {
    font-size: 72px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero p {
    font-size: 22px;
    line-height: 1.8;
    color: var(--muted);
    max-width: 650px;
}

.btn {
    display: inline-block;
    margin-top: 40px;
    background: var(--primary);
    color: #000;
    padding: 16px 36px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
}

.hero-symbol {
    position: relative;
    height: 450px;
}

.arc {
    position: absolute;
    border: 40px solid var(--primary);
    border-left: none;
    border-bottom: none;
}

.arc1 {
    width: 320px;
    height: 320px;
    right: 0;
    top: 20px;
    border-radius: 0 320px 0 0;
}

.arc2 {
    width: 170px;
    height: 170px;
    right: 0;
    top: 180px;
    border-radius: 0 170px 0 0;
}

.section {
    padding: 100px 0;
}

.dark {
    background: var(--background-dark);
}

.section-label {
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 2px;
}

.section h2 {
    font-size: 54px;
    margin-top: 12px;
    margin-bottom: 40px;
}

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

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 35px;
}

.icon {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 20px;
}

.card h3 {
    font-size: 28px;
    margin-bottom: 15px;
}

.card p {
    color: var(--muted);
    line-height: 1.8;
}

.open-source {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.projects {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.projects div {
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
    font-size: 20px;
}

.btn-outline {
    display: inline-block;
    margin-top: 30px;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
}

.about p {
    color: var(--muted);
    line-height: 1.9;
    max-width: 800px;
    margin-bottom: 20px;
}

.contact {
    text-align: center;
}

.contact p {
    color: var(--muted);
    margin-bottom: 20px;
}

.footer {
    border-top: 1px solid var(--border);
    padding: 30px 0;
    display: flex;
    justify-content: space-between;
}

@media(max-width:900px) {

    .hero-grid,
    .open-source,
    .cards {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 48px;
    }

    nav {
        display: none;
    }

    .footer {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}