/* ---------- Base ---------- */

:root {
    --color-bg: #f7f8f8;
    --color-surface: #ffffff;
    --color-text: #172126;
    --color-muted: #5d696f;
    --color-border: #d9dfe2;
    --color-accent: #176b78;

    --content-width: 1200px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);

    font-family:
        Inter,
        ui-sans-serif,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    font-size: 1rem;
    line-height: 1.6;
}

/* ---------- Header ---------- */

header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

header > div {
    width: min(100% - 3rem, var(--content-width));
    margin-inline: auto;
    padding-block: 1.25rem;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

header > div > a {
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -0.02em;
}

nav {
    display: flex;
    gap: 1.5rem;
}

nav a {
    color: var(--color-muted);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
    color: var(--color-accent);
}

/* ---------- Main ---------- */

main {
    width: min(100% - 3rem, var(--content-width));
    margin-inline: auto;
}

section {
    padding-block: 4rem;
    border-bottom: 1px solid var(--color-border);
}

#intro {
    padding-block: 7rem;
}

h1,
h2 {
    margin-top: 0;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

h1 {
    max-width: 850px;
    margin-bottom: 2rem;
    font-size: clamp(2.75rem, 7vw, 5.5rem);
    font-weight: 700;
}

h2 {
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

p {
    max-width: 750px;
    margin-block: 0 1.25rem;
}

#intro p:first-of-type {
    font-size: clamp(1.15rem, 2vw, 1.4rem);
    line-height: 1.5;
}

#intro p:last-of-type {
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* ---------- Footer ---------- */

footer {
    width: min(100% - 3rem, var(--content-width));
    margin-inline: auto;
    padding-block: 2rem;
}

footer p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.875rem;
}

/* ---------- Section Content ---------- */

.section-content p:first-child {
    font-size: 1.15rem;
}

.section-content .secondary {
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* ---------- Services ---------- */

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.service-grid article {
    border-top: 2px solid var(--color-accent);
    padding-top: 1.25rem;
}

.service-grid h3 {
    margin-block: 0 0.75rem;
    font-size: 1.1rem;
    line-height: 1.3;
}

.service-grid p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* ---------- Contact ---------- */

.contact-email {
    margin-top: 2rem;
}

.contact-email a {
    color: var(--color-text);
    font-size: 1.15rem;
    font-weight: 600;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.3em;
}

.contact-email a:hover,
.contact-email a:focus-visible {
    color: var(--color-accent);
}

/* ---------- Small screens ---------- */

@media (max-width: 700px) {
    header > div {
        width: min(100% - 2rem, var(--content-width));
        align-items: flex-start;
        flex-direction: column;
        gap: 0.75rem;
    }

    .service-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    nav {
        width: 100%;
        gap: 1rem;
        overflow-x: auto;
    }

    main,
    footer {
        width: min(100% - 2rem, var(--content-width));
    }

    #intro {
        padding-block: 4rem;
    }

    section {
        padding-block: 3rem;
    }
}