:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #6b7684;
  --border: #e2e5ea;
  --accent: #1f5fbf;
  --accent-soft: #e8f0fc;
  --ok: #1d7a46;
  --ok-soft: #e3f4ea;
  --warn: #9a6200;
  --warn-soft: #fdf1dc;
  --danger: #b42318;
  --danger-soft: #fdeceb;
  --info: #5b3fa8;
  --info-soft: #efeafb;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  color-scheme: light;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.45; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; margin: .2rem 0 1rem; display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
h2 { font-size: 1rem; margin: 0 0 .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; font-weight: 600; }
h3 { font-size: 1rem; margin: 0 0 .75rem; }
code { background: var(--bg); padding: .1rem .3rem; border-radius: 4px; }
address { font-style: normal; margin-bottom: .6rem; }

/* Barre du haut */
.topbar { display: flex; align-items: center; gap: 2rem; padding: 0 1.5rem; height: 56px; background: #16202e; color: #fff; position: sticky; top: 0; z-index: 10; }
.brand { font-weight: 700; font-size: 1.15rem; color: #fff; letter-spacing: -.01em; }
.brand span { color: #7fb0ff; }
.brand:hover { text-decoration: none; }
.brand-lg { font-size: 1.8rem; color: var(--text); }
.brand-lg span { color: var(--accent); }
.mainnav { display: flex; gap: .25rem; flex: 1; }
.mainnav a { color: #c7d0dc; padding: .45rem .75rem; border-radius: 6px; }
.mainnav a:hover { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.mainnav a[aria-current="page"] { background: rgba(127,176,255,.18); color: #fff; }
.usermenu { display: flex; gap: 1rem; align-items: center; font-size: .9rem; }
.usermenu a, .usermenu .linklike { color: #c7d0dc; }
.usermenu form { margin: 0; }
.username { color: #fff; font-weight: 600; }
.linklike { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.linklike:hover { text-decoration: underline; }

.container { max-width: 1280px; margin: 0 auto; padding: 1.5rem; }
.auth { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; }
.auth-card { width: 100%; max-width: 380px; padding: 2rem; }
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.breadcrumb { color: var(--muted); font-size: .9rem; margin: 0 0 .25rem; }

/* Cartes et grilles */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem 1.25rem; margin-bottom: 1.25rem; }
.card.flush { padding: 0; overflow-x: auto; }
.card.narrow { max-width: 480px; }
.card .pad, .card.flush > h2 { padding: 1.1rem 1.25rem 0; }
.card-foot { margin: .75rem 0 0; font-size: .9rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.grid-2 > .card, .grid-3 > .card { margin-bottom: 0; }
.grid-2, .grid-3 { margin-bottom: 1.25rem; }

/* Indicateurs */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; margin-bottom: 1.25rem; }
.kpi { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; color: var(--text); box-shadow: var(--shadow); }
.kpi:hover { border-color: var(--accent); text-decoration: none; }
.kpi-label { color: var(--muted); font-size: .85rem; }
.kpi-value { font-size: 1.7rem; font-weight: 700; font-variant-numeric: tabular-nums; margin: .15rem 0; }
.kpi-sub { color: var(--muted); font-size: .85rem; }
.kpi-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.kpi-accent .kpi-label, .kpi-accent .kpi-sub { color: rgba(255,255,255,.8); }

/* Tableaux */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .55rem .75rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { font-size: .8rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; background: #fafbfc; }
.table tbody tr:hover { background: #fafbfd; }
.table tfoot td { border-bottom: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.table .empty, .empty { text-align: center; color: var(--muted); padding: 1.5rem; }
.table.lines tr.comment td { color: var(--muted); font-style: italic; border-bottom-color: transparent; padding-top: .3rem; padding-bottom: .3rem; }
.truncate { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sort { color: inherit; }
.sort.asc::after { content: " ▲"; }
.sort.desc::after { content: " ▼"; }

/* Listes de définitions */
.dl { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1rem; margin: 0; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }
.dl-num dd { text-align: right; font-variant-numeric: tabular-nums; }
.dl-cols { grid-template-columns: repeat(4, max-content 1fr); }
.due { color: var(--danger); }

/* Badges */
.badge { display: inline-block; font-size: .75rem; font-weight: 600; padding: .15rem .5rem; border-radius: 999px; white-space: nowrap; vertical-align: middle; }
.badge-ok { background: var(--ok-soft); color: var(--ok); }
.badge-due { background: var(--warn-soft); color: var(--warn); }
.badge-late { background: var(--danger-soft); color: var(--danger); }
.badge-partial { background: var(--info-soft); color: var(--info); }
.badge-muted { background: var(--bg); color: var(--muted); font-weight: 500; }

/* Formulaires */
input, select, textarea { font: inherit; padding: .45rem .6rem; border: 1px solid #cfd5dd; border-radius: 6px; background: #fff; color: var(--text); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { width: 100%; resize: vertical; }
label { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; font-weight: 500; }
label.inline { flex-direction: row; align-items: center; gap: .4rem; font-weight: 400; }
.stack { display: flex; flex-direction: column; gap: 1rem; }
.stack input { width: 100%; }
.filters { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-bottom: 1rem; }
.filters input[type="search"] { min-width: 280px; flex: 1; max-width: 420px; }
.summary { color: var(--muted); margin: 0 0 .75rem; }
.summary strong { color: var(--text); }
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .5rem .95rem; border-radius: 6px; border: 1px solid #cfd5dd; background: #fff; color: var(--text); font: inherit; font-weight: 500; cursor: pointer; white-space: nowrap; }
.btn:hover { background: #f3f5f8; text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: #194f9f; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-sm { padding: .3rem .6rem; font-size: .85rem; }
.payment-form { border-top: 1px solid var(--border); margin-top: 1rem; padding-top: 1rem; }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.form-grid .wide { grid-column: span 3; }
.form-grid input, .form-grid select { width: 100%; }
.has-error input, .has-error select { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: .85rem; font-weight: 400; margin: 0; }
.help { color: var(--muted); font-size: .8rem; font-weight: 400; }
.inline-form { display: flex; gap: .4rem; margin-top: .4rem; }

/* Messages */
.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.msg { padding: .7rem 1rem; border-radius: 6px; margin: 0 0 .5rem; background: var(--accent-soft); }
.msg-success { background: var(--ok-soft); color: var(--ok); }
.msg-error { background: var(--danger-soft); color: var(--danger); }
.msg-warning { background: var(--warn-soft); color: var(--warn); }

.pagination { display: flex; gap: 1rem; justify-content: center; align-items: center; margin: 1rem 0; color: var(--muted); font-size: .9rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.pre { white-space: pre-line; margin: 0; }

@media (max-width: 1000px) {
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .topbar { height: auto; flex-wrap: wrap; gap: .5rem 1rem; padding: .6rem 1rem; }
  .mainnav { order: 3; flex-basis: 100%; overflow-x: auto; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .wide { grid-column: auto; }
  .dl-cols { grid-template-columns: max-content 1fr; }
}

/* Types de pièces, avoirs, confirmation de suppression */
.type { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.type-facture { color: var(--accent); }
.type-avoir { color: var(--info); }
.type-commande { color: var(--muted); }
.badge-credit { background: var(--info-soft); color: var(--info); }
.credit { color: var(--info); }
.tabs { display: flex; gap: .25rem; padding: .9rem 1.25rem 0; border-bottom: 1px solid var(--border); }
.tabs a { padding: .5rem .9rem; border-bottom: 2px solid transparent; color: var(--muted); font-weight: 500; }
.tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }
.tabs a:hover { text-decoration: none; color: var(--text); }
.tabs .count { color: var(--muted); font-weight: 400; margin-left: .25rem; }
details.confirm { position: relative; }
details.confirm summary { cursor: pointer; color: var(--danger); font-size: .85rem; list-style: none; }
details.confirm summary::-webkit-details-marker { display: none; }
.confirm-box { position: absolute; right: 0; top: 1.6rem; z-index: 5; width: 260px; text-align: left; white-space: normal;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem;
  box-shadow: 0 8px 24px rgba(16, 24, 40, .12); }
.confirm-box p { margin: 0 0 .6rem; font-size: .9rem; }

/* Page de connexion */
.auth-card .brand-lg { display: block; margin-bottom: 1.5rem; }