:root {
    --background: #f7f8fa;
    --surface: #ffffff;
    --text: #20242a;
    --muted: #5d6672;
    --accent: #285f8f;
    --border: #dfe3e8;
    --max-width: 960px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--background);
}

.container {
    width: min(90%, var(--max-width));
    margin: 0 auto;
}

header {
    padding: 5rem 0 4rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

h1 {
    margin: 0;
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.title {
    margin: 0.75rem 0 0;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--accent);
    font-weight: 600;
}

.intro {
    max-width: 700px;
    margin: 1.5rem 0;
    font-size: 1.1rem;
    color: var(--muted);
}

nav {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}

a:hover,
a:focus-visible {
    text-decoration: underline;
}

main {
    padding: 4rem 0;
}

h2 {
    margin-top: 0;
    font-size: 2rem;
}

article {
    margin: 1.5rem 0;
    padding: 1.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
}

article h3 {
    margin: 0;
    font-size: 1.4rem;
}

.technology {
    margin: 0.35rem 0 1rem;
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

article p {
    max-width: 720px;
}

footer {
    padding: 2rem 0;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
    header {
        padding: 3.5rem 0 3rem;
    }

    main {
        padding: 2.5rem 0;
    }

    article {
        padding: 1.25rem;
    }
}