/* ============================================================
   FlexTray shared design tokens + site chrome (header/footer/nav)
   "Engineering blueprint" direction - see index.html for the
   full pattern library (spec panels, mode cards, etc). This file
   holds only what every page needs: tokens, body, header, footer.
   ============================================================ */
:root {
    --bg: #F2F5F8;
    --surface: #FFFFFF;
    --surface-2: #E7ECF1;
    --ink: #16283D;
    --text-secondary: #445872;
    --text-muted: #7A8CA3;
    --line: #1B3A5C;
    --line-soft: rgba(27, 58, 92, 0.14);
    --border: #D4DCE4;
    --signal: #C97A1D;
    --signal-ink: #FFFFFF;
    --shadow: rgba(22, 40, 61, 0.08);
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0E1B2B;
        --surface: #16283D;
        --surface-2: #1E3350;
        --ink: #EAF2F8;
        --text-secondary: #AEC2D6;
        --text-muted: #7891AC;
        --line: #6FB8D6;
        --line-soft: rgba(111, 184, 214, 0.14);
        --border: #2A4363;
        --signal: #F2B84B;
        --signal-ink: #16283D;
        --shadow: rgba(0, 0, 0, 0.4);
    }
}
* { box-sizing: border-box; }
body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg);
    background-image:
        repeating-linear-gradient(26.565deg, var(--line-soft) 0 1px, transparent 1px 45px),
        repeating-linear-gradient(-26.565deg, var(--line-soft) 0 1px, transparent 1px 45px);
    color: var(--ink);
    line-height: 1.5;
}
.mono {
    font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-variant-numeric: tabular-nums;
}
h1, h2, h3 { text-wrap: balance; font-family: 'IBM Plex Sans', sans-serif; }
a { color: inherit; }

/* ---------- Header ---------- */
header.site { border-bottom: 1px solid var(--border); }
.site-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    row-gap: 10px;
}
.site-left { display: flex; align-items: center; gap: 16px; }
.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    text-decoration: none;
}
.wordmark svg { display: block; }
.site-tag {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
@media (max-width: 860px) { .site-tag { display: none; } }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--text-secondary);
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav .trolley-link { display: inline-flex; align-items: center; gap: 6px; }
.site-nav .trolley-link svg { display: block; }
.trolley-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 15px;
    height: 15px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--signal);
    color: var(--signal-ink);
    font-size: 0.62rem;
    font-weight: 700;
}
@media (max-width: 560px) { .site-nav { gap: 14px; } }

/* ---------- Shared page/section scaffolding ---------- */
.page { max-width: 1120px; margin: 0 auto; padding: 8px 24px 80px; }
@media (max-width: 640px) { .page { padding: 8px 20px 56px; } }
section + section {
    margin-top: 56px;
    padding-top: 56px;
    border-top: 1px solid var(--border);
}
@media (max-width: 640px) { section + section { margin-top: 40px; padding-top: 40px; } }
.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 22px; }
.section-num { font-family: 'IBM Plex Mono', monospace; font-size: 0.95rem; color: var(--signal); }
h2 { font-size: 1.75rem; font-weight: 700; margin: 0; }
.section-intro { color: var(--text-muted); font-size: 0.85rem; margin: -12px 0 22px; }
.eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--signal);
    border: 1px solid var(--signal);
    border-radius: 3px;
    padding: 4px 9px;
    margin-bottom: 20px;
}

/* ---------- Footer ---------- */
footer {
    max-width: 1120px;
    margin: 0 auto;
    padding: 28px 24px 48px;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-family: 'IBM Plex Mono', monospace;
    border-top: 1px solid var(--border);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 16px; }
.footer-nav a { text-decoration: none; color: var(--text-secondary); }
.footer-nav a:hover { color: var(--ink); }