:root {
  --accent: #1b5ea8;
  --accent-dark: #144a85;
  --accent-soft: #e8f0fa;
  --ink: #1d2733;
  --muted: #5d6b7a;
  --line: #d9e0e8;
  --bg: #f4f6f9;
  --card: #fff;
  --danger: #b3261e;
  --ok: #1e7a46;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { font-size: 15px; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; line-height: 1.45; }
h1, h2, h3 { margin: 0 0 .5rem; line-height: 1.2; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; } h3 { font-size: 1rem; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .87rem; }
.hidden { display: none !important; }

/* --- en-tête --- */
.topbar { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.topbar .in { max-width: 1280px; margin: 0 auto; padding: .6rem 1rem; display: flex; align-items: center; gap: 1.2rem; }
.brand { font-weight: 700; color: var(--accent); letter-spacing: .2px; }
.topbar nav { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.topbar nav a { text-decoration: none; color: var(--ink); padding: .4rem .75rem; border-radius: 8px; }
.topbar nav a:hover { background: var(--bg); }
.topbar nav a.active { background: var(--accent-soft); color: var(--accent-dark); font-weight: 600; }
main { max-width: 1280px; margin: 0 auto; padding: 1.2rem 1rem 4rem; }

/* --- composants --- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; }
.stack > * + * { margin-top: .9rem; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.row.between { justify-content: space-between; }
.grow { flex: 1; }
.btn { font: inherit; border: 1px solid var(--line); background: #fff; color: var(--ink); padding: .45rem .85rem;
  border-radius: 8px; cursor: pointer; }
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--accent-dark); }
.btn.danger { color: var(--danger); }
.btn.sm { padding: .2rem .5rem; font-size: .85rem; }
.btn.icon { padding: .15rem .45rem; min-width: 1.9rem; }
.badge { display: inline-block; font-size: .75rem; padding: .1rem .5rem; border-radius: 99px; background: var(--accent-soft);
  color: var(--accent-dark); font-weight: 600; }
.badge.ok { background: #e3f4ea; color: var(--ok); }

label.field { display: block; }
label.field > span { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .2rem; }
input[type=text], input[type=password], input[type=search], input[type=file], textarea, select {
  font: inherit; width: 100%; padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); }
textarea { resize: vertical; min-height: 2.6rem; }
input:focus-visible, textarea:focus-visible, select:focus-visible, .btn:focus-visible, summary:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px; }
.chk { display: flex; gap: .5rem; align-items: flex-start; cursor: pointer; }
.chk input { margin-top: .25rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
.grid3 { display: grid; grid-template-columns: 1.2fr 1.6fr 1fr; gap: .7rem; }
.hint { color: var(--muted); font-size: .85rem; margin: .25rem 0 0; }
.notice { background: var(--accent-soft); border: 1px solid #c9dcf3; border-radius: 10px; padding: .6rem .8rem; font-size: .9rem; }
.notice.warn { background: #fff6e0; border-color: #f0dca4; }
.notice.err { background: #fdecea; border-color: #f2c1bc; color: #7a1812; }

/* --- connexion --- */
.center { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.auth { width: min(440px, 100%); }
.auth h1 { color: var(--accent); }
.qr { background: #fff; padding: .5rem; border: 1px solid var(--line); border-radius: 10px; width: 220px; height: 220px; }
code.secret { word-break: break-all; background: var(--bg); padding: .2rem .4rem; border-radius: 6px; }
.codes { columns: 2; font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--bg); padding: .8rem 1rem; border-radius: 8px; }
.codes div { padding: .1rem 0; }

/* --- liste des dossiers --- */
.dlist { display: grid; gap: .8rem; }
.ditem { display: flex; gap: 1rem; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.ditem h3 { margin: 0; }

/* --- éditeur de dossier --- */
.editor { display: grid; grid-template-columns: minmax(360px, 520px) 1fr; gap: 1rem; align-items: start; }
.editor .preview { position: sticky; top: 4.2rem; }
.editor iframe { width: 100%; height: calc(100vh - 7.5rem); border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.preview .empty { height: calc(100vh - 7.5rem); display: grid; place-items: center; text-align: center; padding: 1rem;
  border: 2px dashed var(--line); border-radius: 10px; color: var(--muted); }
.tree h3 { margin-top: 1rem; padding-bottom: .25rem; border-bottom: 1px solid var(--line); }
.node { margin: .15rem 0; }
.node-row { display: flex; gap: .4rem; align-items: flex-start; justify-content: space-between; padding: .15rem .2rem; border-radius: 6px; }
.node-row:hover { background: var(--bg); }
.node-row .chk { flex: 1; min-width: 0; }
.children { margin-left: 1.4rem; border-left: 2px solid var(--line); padding-left: .5rem; }
.children.off { opacity: .45; }
.ord { display: flex; gap: .15rem; flex: none; }
.savebar { position: sticky; bottom: 0; background: rgba(255,255,255,.96); backdrop-filter: blur(4px); border-top: 1px solid var(--line);
  padding: .6rem 0; margin-top: 1rem; z-index: 10; }
.dirty-dot { color: #b26a00; font-weight: 600; }
.saved-dot { color: var(--ok); }

/* --- bibliothèque --- */
.tabs { display: flex; gap: .3rem; border-bottom: 1px solid var(--line); margin-bottom: 1rem; flex-wrap: wrap; }
.tabs a { padding: .5rem .9rem; text-decoration: none; color: var(--muted); border-bottom: 3px solid transparent; }
.tabs a.active { color: var(--accent-dark); border-bottom-color: var(--accent); font-weight: 600; }
details.item { background: var(--card); border: 1px solid var(--line); border-radius: 10px; margin-bottom: .7rem; }
details.item > summary { cursor: pointer; padding: .65rem .9rem; font-weight: 600; list-style: none; display: flex; gap: .6rem; align-items: center; }
details.item > summary::-webkit-details-marker { display: none; }
details.item > summary::before { content: "▸"; color: var(--muted); width: 1em; }
details.item[open] > summary::before { content: "▾"; }
details.item > .body { padding: .2rem .9rem .9rem; border-top: 1px solid var(--line); }
details.item.sub { background: #fafbfd; margin: .6rem 0 0; }
details.item.sub > summary { font-weight: 500; }
.sum-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sum-sub { color: var(--muted); font-weight: 400; margin-left: .5rem; }
.rows .r { display: grid; grid-template-columns: 1fr 2fr auto; gap: .5rem; margin-bottom: .45rem; align-items: start; }
.rows .r.three { grid-template-columns: .8fr 1.6fr 1.2fr auto; }
.rows .r.two { grid-template-columns: 1fr 1fr auto; }
.rows .r.one { grid-template-columns: 1fr auto; }

/* --- fenêtres, messages --- */
dialog.dlg { border: none; border-radius: 14px; padding: 1.2rem; width: min(480px, 94vw); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog.dlg::backdrop { background: rgba(20, 30, 45, .45); }
dialog.dlg h2 { margin-bottom: .8rem; }
#toasts { position: fixed; right: 1rem; bottom: 1rem; display: grid; gap: .5rem; z-index: 100; max-width: min(420px, 92vw); }
.toast { background: #243447; color: #fff; padding: .6rem .9rem; border-radius: 10px; box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.toast.err { background: var(--danger); }
.toast.ok { background: var(--ok); }

@media (max-width: 1000px) {
  .editor { grid-template-columns: 1fr; }
  .editor .preview { position: static; }
  .editor iframe, .preview .empty { height: 70vh; }
  .grid3, .grid2 { grid-template-columns: 1fr; }
  .rows .r, .rows .r.three, .rows .r.two { grid-template-columns: 1fr; }
}
@media print { .topbar, .savebar, #toasts { display: none; } }