:root {
    --bg: #f6f7f9; --surface: #ffffff; --text: #1d2330; --muted: #5d6677; --border: #dde1e8;
    --accent: #2457d6; --accent-text: #ffffff; --user: #e9effc; --error: #b42318; --ok: #157f3b;
}
@media (prefers-color-scheme: dark) {
    :root { --bg: #14171d; --surface: #1c2028; --text: #e6e9ef; --muted: #9aa3b2; --border: #2e3440;
            --accent: #5b8cff; --accent-text: #0d1117; --user: #243150; --error: #ff8a80; --ok: #6fd28f; }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; display: flex; flex-direction: column; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--border); }
.brand { font-weight: 600; }
.nav { display: flex; gap: 16px; margin-right: auto; margin-left: 24px; }
.nav a { color: var(--text); text-decoration: none; }
.nav a:hover { color: var(--accent); }
.logout { display: flex; gap: 12px; align-items: center; margin: 0; }
.who { color: var(--muted); font-size: 13px; }
main { flex: 1; min-height: 0; display: flex; }
button, .button { font: inherit; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 8px; padding: 8px 14px; cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
input, textarea { font: inherit; width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); }
label { display: block; margin: 14px 0 4px; font-weight: 500; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.card.narrow { max-width: 420px; width: calc(100% - 32px); margin: 48px auto; align-self: flex-start; }
.card button[type=submit] { margin-top: 18px; width: 100%; }
.error, .field-error { color: var(--error); }
.ok { color: var(--ok); font-weight: 600; }
.muted { color: var(--muted); font-size: 13px; word-break: break-all; }
.qr { display: flex; justify-content: center; margin: 12px 0; background: #fff; border-radius: 8px; padding: 8px; }
.qr svg { width: 220px; height: 220px; }
.codes { columns: 2; font-size: 15px; }
.chat-layout { flex: 1; display: flex; min-height: 0; width: 100%; }
.sidebar { width: 260px; border-right: 1px solid var(--border); padding: 12px; overflow-y: auto; background: var(--surface); }
.sidebar button { width: 100%; }
.sidebar ul { list-style: none; padding: 0; margin: 12px 0 0; }
.sidebar li { padding: 8px 10px; border-radius: 8px; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--muted); }
.sidebar li:hover, .sidebar li.active { background: var(--bg); color: var(--text); }
.chat { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.messages { flex: 1; overflow-y: auto; padding: 20px max(16px, calc(50% - 380px)); }
.empty { text-align: center; color: var(--muted); margin-top: 12vh; }
.message { margin: 0 0 14px; padding: 10px 14px; border-radius: 12px; max-width: 100%; overflow-wrap: anywhere; }
.message.user { background: var(--user); margin-left: 15%; white-space: pre-wrap; }
.message.assistant { background: var(--surface); border: 1px solid var(--border); }
.message.assistant p { margin: 0 0 8px; } .message.assistant p:last-child { margin: 0; }
.message.assistant ul, .message.assistant ol { margin: 4px 0 8px; padding-left: 22px; }
.message.pending:empty::after { content: "…"; color: var(--muted); }
.message.error { color: var(--error); border-color: var(--error); }
.ask { display: flex; gap: 8px; padding: 12px max(16px, calc(50% - 380px)) 16px; border-top: 1px solid var(--border); background: var(--surface); }
.ask textarea { resize: none; }
main:has(.page) { overflow-y: auto; }
.page { width: 100%; max-width: 1100px; margin: 0 auto; padding: 20px 16px 40px; }
.page h1 { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; align-items: start; }
.columns .card h2 { margin-top: 0; font-size: 18px; }
.card textarea { resize: vertical; }
table.list { width: 100%; border-collapse: collapse; }
table.list th, table.list td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--border); }
pre.note { white-space: pre-wrap; font: inherit; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px; margin: 0 0 10px; }
.status { font-size: 13px; font-weight: 500; padding: 2px 9px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); white-space: nowrap; }
.status.s-AValider { color: var(--accent); border-color: var(--accent); }
.status.s-Envoye, .status.s-Valide { color: var(--ok); border-color: var(--ok); }
.status.s-Erreur, .status.s-Refuse { color: var(--error); border-color: var(--error); }
.actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.actions button { width: auto; margin-top: 0; }
@media (max-width: 720px) {
    .sidebar { display: none; }
    .message.user { margin-left: 8%; }
}