:root {
    --color-bg: #0f1115;
    --color-bg-alt: #161922;
    --color-text: #e8e9ec;
    --color-text-muted: #9aa0ac;
    --color-accent: #5fb3ff;
    --color-border: #262b36;
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 2.5rem;
    --space-5: 4rem;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 960px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    line-height: 1.6;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-3);
}

h1, h2, h3 {
    line-height: 1.25;
    font-weight: 600;
}

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

a:hover {
    text-decoration: underline;
}

/* Header */

.site-header {
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
    position: relative;
}

.site-header__brand {
    color: var(--color-text);
    font-weight: 600;
}

.nav-toggle {
    display: block;
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 1.25rem;
    padding: var(--space-1) var(--space-2);
    border-radius: 4px;
    cursor: pointer;
}

.site-nav {
    display: none;
    flex-direction: column;
    gap: var(--space-2);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    padding: var(--space-2);
}

.site-nav.is-open {
    display: flex;
}

.lang-switch {
    display: flex;
    gap: var(--space-1);
    font-weight: 600;
}

.lang-switch__link {
    color: var(--color-text-muted);
    padding: 0 0.25rem;
    border-radius: 4px;
}

.lang-switch__link[aria-current="page"] {
    color: #0f1115;
    background: var(--color-accent);
    pointer-events: none;
}

/* Sections */

section {
    padding: var(--space-5) 0;
    border-bottom: 1px solid var(--color-border);
}

.hero {
    text-align: center;
}

.hero__tagline {
    color: var(--color-text-muted);
    max-width: 40ch;
    margin: var(--space-2) auto var(--space-3);
}

.button {
    display: inline-block;
    background: var(--color-accent);
    color: #0f1115;
    padding: var(--space-2) var(--space-3);
    border-radius: 4px;
    font-weight: 600;
}

.button:hover {
    text-decoration: none;
    opacity: 0.9;
}

.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.service-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: var(--space-3);
}

.service-card h3 {
    margin-top: 0;
}

/* Contact form */

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    max-width: 32rem;
    margin-top: var(--space-3);
}

.contact-form label {
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: var(--space-1) var(--space-2);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.contact-form button {
    align-self: flex-start;
    background: var(--color-accent);
    color: #0f1115;
    border: none;
    padding: var(--space-2) var(--space-3);
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
}

.honeypot {
    position: absolute;
    left: -9999px;
    top: -9999px;
    height: 0;
    width: 0;
    overflow: hidden;
}

.form-status {
    padding: var(--space-2);
    border-radius: 4px;
    margin-top: var(--space-3);
}

.form-status--sent {
    background: rgba(95, 179, 255, 0.15);
    border: 1px solid var(--color-accent);
}

.form-status--invalid,
.form-status--limit {
    background: rgba(255, 95, 95, 0.12);
    border: 1px solid #ff5f5f;
}

/* Footer */

.site-footer {
    padding: var(--space-3) 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive */

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        display: flex;
        flex-direction: row;
        position: static;
        border: none;
        background: none;
        padding: 0;
    }

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

@media (min-width: 1024px) {
    .services__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}