:root {
  --bg: #f6f8f7;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #5b6b7a;
  --primary: #1f4e5a;
  --accent: #2a9d8f;
  --accent-soft: #dcefec;
  --border: #dde5e3;
  --warn: #b45309;
  --warn-soft: #fff1dc;
  --danger: #b42318;
  --danger-soft: #fde7e5;
  --ok: #166534;
  --ok-soft: #dcfce7;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 40, 50, .06), 0 6px 24px rgba(15, 40, 50, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1719;
    --surface: #172225;
    --text: #e6eeee;
    --muted: #9fb0b4;
    --primary: #8fd3c9;
    --accent: #3cbfae;
    --accent-soft: #173a37;
    --border: #2a3a3d;
    --warn: #f5b765;
    --warn-soft: #3a2a12;
    --danger: #ff8a80;
    --danger-soft: #3d1a17;
    --ok: #7ee2a0;
    --ok-soft: #12321f;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
header.site { background: var(--surface); border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.logo { font-weight: 800; color: var(--primary); text-decoration: none; font-size: 1.15rem; letter-spacing: -.01em; }
.logo span { color: var(--accent); }
nav.main { display: flex; gap: 14px; flex-wrap: wrap; font-size: .92rem; }
nav.main a { color: var(--muted); text-decoration: none; }
nav.main a:hover, nav.main a[aria-current] { color: var(--primary); }
main { padding: 28px 0 48px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.2; color: var(--primary); margin: 0 0 10px; letter-spacing: -.02em; }
h2 { font-size: 1.35rem; color: var(--primary); margin: 36px 0 10px; }
h3 { font-size: 1.08rem; margin: 22px 0 6px; }
.lead { font-size: 1.08rem; color: var(--muted); margin: 0 0 22px; }
.updated { font-size: .85rem; color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.tool-card { display: block; text-decoration: none; color: inherit; transition: transform .12s ease, border-color .12s ease; }
.tool-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.tool-card h3 { margin-top: 0; color: var(--primary); }
.tool-card p { margin: 0; color: var(--muted); font-size: .95rem; }
form.calc, .calc { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); align-items: end; }
label { display: grid; gap: 6px; font-size: .9rem; font-weight: 600; }
label small { font-weight: 400; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button, .btn {
  font: inherit; font-weight: 700; border: 0; border-radius: 10px; padding: 11px 18px; cursor: pointer;
  background: var(--accent); color: #fff; text-decoration: none; display: inline-block;
}
.btn.secondary, button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button:hover, .btn:hover { filter: brightness(1.05); }
.results { margin-top: 18px; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.stat { background: var(--accent-soft); border-radius: 12px; padding: 14px; }
.stat .k { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .v { font-size: 1.45rem; font-weight: 800; color: var(--primary); font-variant-numeric: tabular-nums; }
.stat.big .v { font-size: 1.8rem; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--border); text-align: left; }
th { font-size: .82rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
td.num, th.num { text-align: right; }
.table-wrap { overflow-x: auto; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .82rem; font-weight: 700; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.bar { height: 10px; background: var(--border); border-radius: 999px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.bar.warn > i { background: var(--warn); }
.bar.danger > i { background: var(--danger); }
.note { font-size: .9rem; color: var(--muted); }
.callout { border-left: 4px solid var(--accent); background: var(--surface); padding: 14px 16px; border-radius: 0 12px 12px 0; margin: 18px 0; }
.promo { display: grid; gap: 16px; grid-template-columns: 1fr auto; align-items: center; background: var(--primary); color: #fff; border-radius: var(--radius); padding: 20px 22px; margin: 32px 0; }
.promo h3 { margin: 0 0 4px; color: #fff; }
.promo p { margin: 0; opacity: .9; }
.promo .btn { background: #fff; color: #1f4e5a; }
@media (prefers-color-scheme: dark) { .promo { background: #1d3f46; } }
.partner { font-size: .78rem; color: var(--muted); }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 700; }
footer.site { border-top: 1px solid var(--border); padding: 24px 0 40px; font-size: .88rem; color: var(--muted); }
footer.site nav { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
footer.site a { color: var(--muted); }
.row-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.hidden { display: none !important; }
/* Facture */
.inv-grid { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
@media (max-width: 720px) { .inv-grid, .promo { grid-template-columns: 1fr; } }
.lines input { padding: 8px; }
.lines td { padding: 6px 4px; }
#invoice { background: #fff; color: #111; padding: 36px; border-radius: 8px; border: 1px solid var(--border); font-size: 14px; line-height: 1.5; }
#invoice h2 { color: #1f4e5a; margin: 0; font-size: 26px; }
#invoice table th { color: #555; }
#invoice .inv-head { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
#invoice .legal { font-size: 11px; color: #555; margin-top: 24px; }
@media print {
  body { background: #fff; }
  body * { visibility: hidden; }
  #invoice, #invoice * { visibility: visible; }
  #invoice { position: absolute; left: 0; top: 0; width: 100%; border: 0; padding: 0; }
  @page { margin: 16mm; }
}