/* NAS Reborn website — shared stylesheet.
   Self-contained by design: system fonts, no external resources, so the site
   serves correctly from a NAS Reborn device on a LAN with no internet. */

:root {
    --paper: #fafcf5;
    --card: #ffffff;
    --ink: #1d221b;
    --muted: #5b6355;
    --link: #2f7fd0;
    --mark: #4db3ff;
    --border: #e3e8d8;
    --code-bg: #f0f3e8;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --paper: #12140f;
        --card: #191c14;
        --ink: #e6eadf;
        --muted: #9aa38e;
        --link: #6cc0ff;
        --border: #2a2e22;
        --code-bg: #1e2218;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
    padding: 0 max(16px, env(safe-area-inset-right)) env(safe-area-inset-bottom) max(16px, env(safe-area-inset-left));
}

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

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }

code, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.88em;
}

code {
    background: var(--code-bg);
    border-radius: 4px;
    padding: 1px 5px;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
    overflow-x: auto;
    line-height: 1.5;
}

pre code { background: none; padding: 0; }

/* header shared by every page */
.site-header {
    max-width: 1000px;
    margin: 0 auto;
    padding: 18px 0 10px;
    display: flex;
    align-items: center;
    gap: 18px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    font-size: 19px;
    color: var(--ink);
}

.brand:hover { text-decoration: none; }
.brand svg { display: block; }
.brand { white-space: nowrap; }

/* long breadcrumbs drop below the brand on narrow screens */
@media (max-width: 520px) {
    .site-header { flex-wrap: wrap; }
    .site-header nav.crumbs { margin-left: 0; flex-basis: 100%; }
}

.site-header nav {
    margin-left: auto;
    display: flex;
    gap: 18px;
    font-weight: 500;
}

.crumbs { color: var(--muted); font-size: 15px; }
.crumbs a { color: var(--muted); }

main { max-width: 1000px; margin: 0 auto; }

/* landing page */
.hero {
    text-align: center;
    padding: 52px 0 30px;
}

.hero .mark { margin-bottom: 14px; }

.hero h1 {
    font-size: clamp(34px, 6vw, 52px);
    font-weight: 700;
    margin: 0 0 10px;
}

.hero .tagline {
    font-size: clamp(19px, 3vw, 24px);
    color: var(--muted);
    max-width: 34em;
    margin: 0 auto 18px;
}

.hero .pitch {
    max-width: 38em;
    margin: 0 auto 26px;
}

.cta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--muted);
    border-radius: 999px;
    padding: 8px 18px;
    font-weight: 500;
}

.cta .go {
    font-weight: 600;
}

/* numbered how-it-works strip */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 16px;
    padding: 0;
    margin: 26px 0 10px;
    list-style: none;
    counter-reset: step;
}

.steps li {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 20px;
    counter-increment: step;
}

.steps li::before {
    content: counter(step);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--mark);
    color: #1d221b;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 8px;
}

.steps b { display: block; margin-bottom: 2px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }

section { margin: 44px 0; }

section > h2 {
    font-size: 26px;
    margin: 0 0 6px;
}

.section-intro { color: var(--muted); margin: 0 0 20px; max-width: 44em; }

/* feature grid, s3files.app style */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.features > div {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 20px;
}

.features h3 {
    margin: 0 0 6px;
    font-size: 17px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.features h3 svg { color: var(--link); flex: none; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }

/* works-with row */
.apps {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.apps a {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px 18px;
    flex: 1 1 220px;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 13px;
}

/* the icons are already squircle-masked with transparent corners, so they
   need no radius of their own and sit on either theme's card */
.apps img { width: 52px; height: 52px; flex: none; }
.apps .app-text { display: block; }

.apps a:hover { text-decoration: none; border-color: var(--link); }
.apps b { display: block; }
.apps span { color: var(--muted); font-size: 15px; }

/* help index topic grid, secureshellfish.app/help style */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin: 14px 0 30px;
}

.topic {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px;
    color: var(--ink);
    display: block;
}

.topic:hover { text-decoration: none; border-color: var(--link); }

.topic h3 {
    margin: 0 0 6px;
    font-size: 17px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--link);
}

.topic h3 svg { flex: none; }
.topic p { margin: 0; color: var(--muted); font-size: 15px; }

/* help articles */
.article {
    max-width: 44em;
    padding-bottom: 30px;
}

.article h1 { font-size: 32px; margin: 18px 0 8px; }
.article h2 { font-size: 21px; margin: 30px 0 8px; }
.article .lede { color: var(--muted); font-size: 18px; margin-top: 0; }
.article li { margin: 4px 0; }

.note {
    background: var(--card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--mark);
    border-radius: 10px;
    padding: 12px 16px;
    margin: 18px 0;
    font-size: 15px;
}

.article .figure {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 10px;
    margin: 18px 0;
}

.article .figure img {
    display: block;
    width: 100%;
    max-width: 420px;
    height: auto;
    margin: 0 auto;
}

/* collapsible all-topics panel on article pages */
.toc {
    margin: 10px 0 0;
    font-size: 15px;
}

.toc summary {
    cursor: pointer;
    color: var(--muted);
    font-weight: 500;
}

.toc-panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 6px 18px 14px;
    margin-top: 8px;
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.toc-panel h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 12px 0 4px; }
.toc-panel ul { list-style: none; margin: 0; padding: 0; }
.toc-panel li { margin: 3px 0; }

/* footer */
.site-footer {
    max-width: 1000px;
    margin: 50px auto 0;
    padding: 20px 0 26px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 14px;
    text-align: center;
}

.site-footer nav {
    display: flex;
    justify-content: center;
    gap: 22px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.site-footer p { margin: 6px 0; }

#served-by { color: var(--link); }