:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #142033;
  --muted: #5d6b82;
  --line: #e2e7f0;
  --brand: #1f6feb;
  --brand-ink: #ffffff;
  --side: #0b1a30;
  --side-ink: #c9d5ea;
  --ok: #1a7f37;
  --ok-bg: #e6f4ea;
  --warn: #9a6700;
  --warn-bg: #fff4d6;
  --bad: #b42318;
  --bad-bg: #fdecea;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1420; --panel: #141d2b; --ink: #e6ecf5; --muted: #93a1b8; --line: #243044;
    --side: #08101c; --ok-bg: #12301d; --warn-bg: #352a0c; --bad-bg: #3a1514;
    --ok: #57c47a; --warn: #e3b341; --bad: #ff7b72;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }
[hidden] { display: none !important; }
a { color: var(--brand); }
h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .75rem; }
h3 { font-size: 1rem; margin: 0 0 .25rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }

/* Connexion */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px;
  background: linear-gradient(135deg, #0b1a30 0%, #16365f 100%); }
.login-card { background: var(--panel); border-radius: 14px; padding: 2rem; max-width: 420px; width: 100%;
  text-align: center; box-shadow: 0 12px 40px rgba(0, 0, 0, .35); }
.login-logo { width: 64px; height: 64px; }
.login-card .btn { margin: 1rem 0; }

/* Mise en page */
.layout { display: grid; grid-template-columns: 230px 1fr; min-height: 100vh; }
.sidebar { background: var(--side); color: var(--side-ink); display: flex; flex-direction: column; padding: 1rem .75rem; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; color: #fff; padding: .25rem .5rem 1rem; }
.brand img { width: 30px; height: 30px; }
#nav { display: flex; flex-direction: column; gap: 2px; }
#nav a { color: var(--side-ink); text-decoration: none; padding: .5rem .75rem; border-radius: 8px; }
#nav a:hover { background: rgba(255, 255, 255, .06); color: #fff; }
#nav a.active { background: var(--brand); color: #fff; }
#nav .sep { margin: .75rem .75rem .25rem; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: #7f8ea8; }
.side-foot { margin-top: auto; padding: .5rem; }
.main { min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .75rem 1.5rem; background: var(--panel); border-bottom: 1px solid var(--line); }
.tenant { display: flex; align-items: center; gap: .5rem; }
.who { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
main { padding: 1.5rem; max-width: 1200px; width: 100%; }
main:focus { outline: none; }

/* Éléments */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink); padding: .45rem .9rem; border-radius: 8px; cursor: pointer;
  font: inherit; text-decoration: none; }
.btn:hover { border-color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.danger { color: var(--bad); }
.btn.ghost { border-color: transparent; }
.btn.small { padding: .2rem .55rem; font-size: .85rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.badge { display: inline-block; padding: .05rem .5rem; border-radius: 999px; font-size: .78rem; font-weight: 600;
  background: var(--line); color: var(--ink); }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.info { background: #e7f0ff; color: #1f4fbf; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.card .kpi { font-size: 1.6rem; font-weight: 700; margin: .25rem 0; }
.card p { margin: .35rem 0; }
.card .row { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .6rem .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.actions { display: flex; gap: .35rem; flex-wrap: wrap; }
.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.empty { padding: 2rem; text-align: center; color: var(--muted); }
.note { background: var(--panel); border-left: 4px solid var(--brand); padding: .75rem 1rem; border-radius: 6px; margin: 1rem 0; }
.note.warn { border-left-color: var(--warn); }
form.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: .75rem; align-items: end; }
label { display: flex; flex-direction: column; gap: .25rem; font-size: .85rem; color: var(--muted); }
input, select { font: inherit; padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); color: var(--ink); min-width: 0; }
label.check { flex-direction: row; align-items: center; gap: .5rem; color: var(--ink); }
.secret { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg); padding: .5rem .75rem;
  border-radius: 6px; user-select: all; word-break: break-all; }
.toast { position: fixed; bottom: 1rem; right: 1rem; background: var(--ink); color: var(--bg); padding: .75rem 1rem;
  border-radius: 8px; max-width: min(90vw, 420px); box-shadow: 0 6px 20px rgba(0, 0, 0, .25); }
.toast.bad { background: var(--bad); color: #fff; }
.tabs { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: 1rem; }

/* Facture */
.invoice { background: #fff; color: #142033; border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; max-width: 820px; }
.invoice .inv-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.invoice table th, .invoice table td { border-color: #e2e7f0; }
.invoice .totals { margin-left: auto; max-width: 320px; margin-top: 1rem; }
.invoice .totals div { display: flex; justify-content: space-between; padding: .25rem 0; }
.invoice .totals .grand { font-weight: 700; border-top: 2px solid #142033; margin-top: .25rem; padding-top: .5rem; }
.invoice .stamp { color: #9a6700; font-weight: 700; }

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; align-items: center; padding: .5rem 16px; }
  .brand { padding: .25rem; }
  #nav { flex-direction: row; flex-wrap: wrap; }
  #nav .sep, .side-foot { display: none; }
  main, .topbar { padding-left: 16px; padding-right: 16px; }
}
@media print {
  .sidebar, .topbar, .no-print, .toast { display: none !important; }
  .layout { display: block; }
  body, main { background: #fff; padding: 0; }
  .invoice { border: 0; padding: 0; max-width: none; }
}