:root {
    --lab-accent: #0f766e;
    --lab-accent-dark: #115e59;
    --lab-accent-soft: #ccfbf1;
    --lab-ink: #1f2937;
    --lab-muted: #6b7280;
    --lab-surface: #f8fafc;
    --lab-border: #e5e7eb;
    --lab-legend: #1e293b;
}

body {
    color: var(--lab-ink);
    background: #fff;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

a { color: var(--lab-accent); }

.btn-lab {
    background: var(--lab-accent);
    border-color: var(--lab-accent);
    color: #fff;
}
.btn-lab:hover, .btn-lab:focus { background: var(--lab-accent-dark); border-color: var(--lab-accent-dark); color: #fff; }

/* Author credits footer, shared by every page (partials/site-footer). */
.site-footer {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px;
    padding: 14px 20px; border-top: 1px solid var(--lab-border); background: var(--lab-surface);
    color: var(--lab-muted); font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
.site-footer strong { color: var(--lab-ink); }
.site-footer-links { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; }
.site-footer-links a { color: var(--lab-accent); text-decoration: none; }
.site-footer-links a:hover { text-decoration: underline; }
.site-footer-links a.site-footer-coffee {
    padding: 4px 12px; border-radius: 999px; background: #ffdd00; color: #1f2937; font-weight: 600;
}
.site-footer-links a.site-footer-coffee:hover { background: #f5d000; text-decoration: none; }

.chaos-banner {
    position: sticky; top: 0; z-index: 2000;
    background: #fef3c7; color: #92400e; border-bottom: 1px solid #fcd34d;
    padding: 6px 16px; font-size: 14px; text-align: center;
}

/* ---------- Landing ---------- */
.hero {
    background: linear-gradient(135deg, var(--lab-accent-dark), var(--lab-accent));
    color: #fff; padding: 64px 0 56px;
}
.hero p { color: #d1fae5; max-width: 640px; }
.module-card { border: 1px solid var(--lab-border); border-radius: 12px; transition: box-shadow .15s, transform .15s; }
.module-card:hover { box-shadow: 0 10px 24px rgba(15, 118, 110, .12); transform: translateY(-2px); }
.module-card .tag { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--lab-accent); font-weight: 700; }

/* ---------- Practice page ---------- */
.practice-header { background: var(--lab-surface); border-bottom: 1px solid var(--lab-border); padding: 14px 0; }
.practice-block {
    display: flex; flex-wrap: wrap; gap: 24px;
    padding: 20px 0; border-bottom: 1px solid var(--lab-border);
}
.practice-block > * { flex: 1 1 220px; }
.practice-block fieldset { border: 1px solid var(--lab-border); border-radius: 10px; padding: 12px 16px 16px; height: 100%; }
.practice-block legend {
    float: none; width: auto; font-size: 14px; color: #fff; background: var(--lab-legend);
    padding: 3px 14px; border-radius: 999px; margin-bottom: 12px;
}
.practice-block label { display: block; line-height: 2; cursor: pointer; }
.inputs {
    background: #f5f5f5; font-size: 14px; border-radius: 4px; border: 0; padding: 11px 10px;
    margin-bottom: 14px; box-shadow: inset 0 2px 3px rgba(0, 0, 0, .1); width: 100%;
}
.inputs:focus { background: #fff; outline: none; box-shadow: 0 0 0 3px var(--lab-accent); }
.btn-style { background: var(--lab-accent); color: #fff; padding: 9px 14px; font-size: 14px; border: 0; border-radius: 4px; cursor: pointer; text-decoration: none; display: inline-block; }
.btn-style:hover { background: var(--lab-accent-dark); color: #fff; }
.table-display, .table-fixed { width: 100%; border-collapse: collapse; font-size: 14px; }
.table-display th, .table-display td, .table-fixed th, .table-fixed td { border: 1px solid var(--lab-accent); padding: 4px 8px; }
.table-display th, .table-fixed th { background: var(--lab-accent); color: #fff; }
.tableFixHead { overflow-y: auto; height: 195px; }
.tableFixHead th { position: sticky; top: 0; }
.totalAmount { font-weight: 700; margin-top: 10px; text-align: right; }
.mouse-hover { position: relative; display: inline-block; }
.mouse-hover-content {
    display: none; position: absolute; z-index: 10; background: #fff; min-width: 160px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, .2); border-radius: 6px; overflow: hidden;
}
.mouse-hover-content a { color: var(--lab-ink); padding: 10px 16px; text-decoration: none; display: block; }
.mouse-hover-content a:hover { background: var(--lab-surface); }
.mouse-hover:hover .mouse-hover-content { display: block; }
.ui-autocomplete { max-height: 260px; overflow-y: auto; overflow-x: hidden; }

/* ---------- ProtoShop ---------- */
.proto-nav { background: #212529; }
.proto-footer { background: #212529; padding: 18px 0; margin-top: 48px; }
app-card { display: block; }
.suggestions { position: absolute; z-index: 20; background: #fff; border: 1px solid var(--lab-border); width: 100%; max-height: 240px; overflow-y: auto; }
.suggestions ul { list-style: none; margin: 0; padding: 0; }
.suggestions li a { display: block; padding: 6px 12px; color: var(--lab-ink); text-decoration: none; cursor: pointer; }
.suggestions li a:hover { background: var(--lab-surface); }

/* ---------- Client e-commerce ---------- */
.client-body { background: #f3f4f6; }
.auth-split { min-height: 100vh; }
.auth-aside { background: linear-gradient(160deg, #0f172a, var(--lab-accent-dark)); color: #fff; }
.auth-aside p { color: #cbd5e1; }
.auth-card { background: #fff; border-radius: 14px; box-shadow: 0 8px 30px rgba(15, 23, 42, .08); }
.demo-creds { background: var(--lab-accent-soft); border-radius: 10px; font-size: 14px; }
.client-nav { background: #0f172a; }
.client-nav .btn-custom { color: #e2e8f0; border: 1px solid transparent; font-weight: 600; font-size: 14px; letter-spacing: .03em; }
.client-nav .btn-custom:hover { border-color: #334155; color: #fff; }
.client-nav .btn-custom label { cursor: pointer; background: #f97316; color: #fff; border-radius: 999px; padding: 0 7px; margin-left: 4px; font-size: 12px; }
.filters { background: #fff; border-radius: 12px; }
.filters h6 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--lab-muted); margin-top: 18px; }
.product-img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; border-radius: 10px 10px 0 0; }
.card { border-radius: 10px; border-color: var(--lab-border); }
.cartSection { background: #fff; border-radius: 10px; }
.cartSection img { width: 96px; border-radius: 8px; }
.ta-results { position: absolute; z-index: 30; background: #fff; border: 1px solid var(--lab-border); border-radius: 8px; width: 100%; max-height: 260px; overflow-y: auto; box-shadow: 0 8px 20px rgba(0,0,0,.08); }
.ta-results button { display: block; width: 100%; text-align: left; background: none; border: 0; padding: 7px 12px; }
.ta-results button:hover, .ta-results button.active { background: var(--lab-accent-soft); }
.hero-primary { color: var(--lab-accent); font-weight: 800; }
.order-id { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 700; }

#toast-container { position: fixed; top: 16px; right: 16px; z-index: 3000; display: flex; flex-direction: column; gap: 8px; max-width: 340px; }
#toast-container .toast-item { color: #fff; padding: 12px 16px; border-radius: 8px; box-shadow: 0 6px 16px rgba(0,0,0,.2); font-size: 14px; cursor: pointer; }
#toast-container .toast-success { background: #15803d; }
#toast-container .toast-error { background: #b91c1c; }
#toast-container .toast-info { background: #1d4ed8; }

.loading-overlay {
    position: fixed; inset: 0; z-index: 2500; background: rgba(15, 23, 42, .35);
    display: flex; align-items: center; justify-content: center;
}
.loading-overlay[hidden] { display: none; }

@media (max-width: 576px) {
    .hero { padding: 40px 0; }
    .cartSection img { width: 64px; }
}