/* Frederich Engineering -- company website stylesheet (T-XC-28).
   Static, no JavaScript, no external fonts, no CDN, no tracking. System font stack only, so no
   request leaks a visitor to a third party. Light + dark aware. Same approach as the Klarfeed
   landing (Products/Klarfeed/Landing/assets/style.css), own colours. */

:root
{
    --bg: #ffffff;
    --fg: #16202a;
    --muted: #5a6573;
    --accent: #0f5c73;
    --accent-fg: #ffffff;
    --card: #f4f6f8;
    --border: #e1e6eb;
    --maxw: 62rem;
}

@media (prefers-color-scheme: dark)
{
    :root
    {
        --bg: #111518;
        --fg: #e6eaee;
        --muted: #98a3ae;
        --accent: #5bb8d0;
        --accent-fg: #0b0e10;
        --card: #1a2024;
        --border: #283037;
    }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body
{
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    line-height: 1.6;
    font-size: 17px;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

/* Header / nav */
header.site { border-bottom: 1px solid var(--border); background: var(--bg); }
header.site .wrap
{
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem 1.5rem;
    min-height: 4rem;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--fg); letter-spacing: .01em; }
.brand span { color: var(--accent); }
.brand:hover { text-decoration: none; }
nav.main { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; align-items: center; }
nav.main a { color: var(--fg); font-size: .97rem; }
nav.main a.active { color: var(--accent); font-weight: 600; }
nav.main .lang { color: var(--muted); font-size: .9rem; }
nav.main .lang a { color: var(--muted); }

/* Hero */
.hero { padding: 4.5rem 0 3.5rem; }
.hero h1 { font-size: 2.5rem; line-height: 1.15; margin: 0 0 1rem; max-width: 40rem; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 42rem; margin: 0 0 2rem; }

.btn
{
    display: inline-block;
    padding: .7rem 1.3rem;
    border-radius: .5rem;
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 600;
}
.btn:hover { text-decoration: none; opacity: .92; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.cta { display: flex; gap: .8rem; flex-wrap: wrap; }

/* Sections + cards */
section { padding: 2.5rem 0; }
section h2 { font-size: 1.5rem; margin: 0 0 1.25rem; }
.section-alt { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1.25rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: .75rem; padding: 1.4rem; }
.section-alt .card { background: var(--bg); }
.card h3 { margin: 0 0 .5rem; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }
.card .status
{
    display: inline-block;
    margin: 0 0 .7rem;
    padding: .1rem .6rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    font-size: .8rem;
    color: var(--muted);
}

/* Text pages (about, legal) */
.content { padding: 2.5rem 1.25rem 3rem; }
.content h1 { font-size: 2rem; margin: 0 0 1.5rem; }
.content h2 { font-size: 1.35rem; margin: 2rem 0 .75rem; }
.content h3 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
.content p, .content li { max-width: 46rem; }
.content ul { padding-left: 1.2rem; }
.content li { margin: .35rem 0; }
code, .fp { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .92em; overflow-wrap: anywhere; }

/* Footer */
footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; padding: 1.5rem 0; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; justify-content: space-between; }
footer.site a { color: var(--muted); }

@media (max-width: 40rem)
{
    .hero { padding: 3rem 0 2.5rem; }
    .hero h1 { font-size: 1.9rem; }
}

.accent { color: var(--accent); }