:root {
  /* Direction artistique : noir / blanc / vert.
     Fond noir, texte des notes blanc, chrome (boutons, bordures, effets) vert. */
  --paper: #0b0d0c;          /* fond de base (noir légèrement vert) */
  --ink: #eef2f0;            /* texte des notes : blanc */
  --muted: #76897f;          /* texte secondaire (gris verdâtre) */
  --rule: #20342a;           /* bordures discrètes teintées vert */
  --rule-strong: #2f5a43;    /* bordures appuyées */
  --accent: #3ad07f;         /* vert principal */
  --accent-2: #2bb56a;       /* vert plus profond (remplissages) */
  --accent-soft: rgba(58, 208, 127, .12);
  --accent-glow: rgba(58, 208, 127, .30);
  --result: #58e09a;         /* résultats calculés (vert vif) */
  --error: #ef6b5e;          /* erreurs (distinct du vert) */
  --gutter-bg: #0e1512;      /* marge / colonnes */
  --panel: #0c1310;          /* barre latérale */
  --panel-active: #15291f;   /* élément actif / survol */
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --line-h: 1.7rem;
  --pad-y: 1.4rem;
  --pad-x: 1.6rem;
  --gutter-w: 104px;
  --lines-w: 44px;
  --sidebar-w: 248px;
}

::selection { background: var(--accent-soft); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
}

.app {
  display: flex;
  height: 100%;
}

/* --- Barre latérale : liste des notes --- */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width .18s ease;
}

.app.collapsed .sidebar {
  width: 0;
  border-right-color: transparent;
}

.sidebar-head {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .9rem 1rem;
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}

.sidebar-head h2 {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.new-note {
  margin-left: auto;
  font: inherit;
  font-size: 1.1rem;
  line-height: 1;
  width: 1.7rem;
  height: 1.7rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.new-note:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 12px var(--accent-glow);
}

/* Recherche */
.search {
  padding: .55rem .7rem;
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}
.search input {
  width: 100%;
  font: inherit;
  font-size: .85rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: .35rem .55rem;
  outline: 0;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.search input::placeholder { color: var(--muted); }
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.note-list {
  flex: 1;
  overflow-y: auto;
  padding: .4rem;
}

.note-item {
  display: flex;
  align-items: center;
  gap: .35rem;
  padding: .55rem .55rem;
  margin-bottom: .15rem;
  border-radius: 7px;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.note-item:hover { background: var(--panel-active); }
.note-item.active {
  background: var(--panel-active);
  border-left-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent-soft);
}
.note-item.dragging { opacity: .45; }
.note-item.drop-before { box-shadow: inset 0 2px 0 var(--accent); }
.note-item.drop-after { box-shadow: inset 0 -2px 0 var(--accent); }

.note-pin {
  flex-shrink: 0;
  font: inherit;
  font-size: .8rem;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0 .1rem;
  opacity: 0;
}
.note-item:hover .note-pin { opacity: .8; }
.note-item.pinned .note-pin { opacity: 1; color: var(--accent); }
.note-pin:hover { color: var(--ink); }

.note-label {
  flex: 1;
  min-width: 0;
  font-size: .88rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.note-item.empty .note-label { color: var(--muted); font-style: italic; }

/* Champ de renommage en place */
.note-rename {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: .88rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--accent);
  border-radius: 5px;
  padding: .1rem .3rem;
  outline: 0;
}

.note-del {
  flex-shrink: 0;
  font: inherit;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0 .2rem;
  line-height: 1;
  font-size: 1.05rem;
  opacity: 0;
}
.note-item:hover .note-del { opacity: 1; }
.note-del:hover { color: var(--error); }

.list-empty {
  padding: 1rem .7rem;
  font-size: .82rem;
  color: var(--muted);
  font-style: italic;
}

/* --- Zone principale --- */
.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  padding: .9rem var(--pad-x);
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}

.toggle, .iconbtn {
  align-self: center;
  font: inherit;
  font-size: 1rem;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: .2rem .3rem;
  transition: color .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.toggle:hover, .iconbtn:hover { color: var(--accent); }
.iconbtn {
  border: 1px solid var(--rule-strong);
  border-radius: 50%;
  width: 1.5rem;
  height: 1.5rem;
  font-size: .8rem;
  color: var(--accent);
}
.iconbtn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 10px var(--accent-glow);
}

header .logo {
  align-self: center;
  border-radius: 6px;
  box-shadow: 0 0 0 1px var(--rule-strong);
  flex-shrink: 0;
}

header h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
}

header .hint { font-size: .78rem; color: var(--muted); }
header .grow { margin-left: auto; }

header .user {
  font-size: .78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

header .offline {
  align-self: center;
  font-size: .7rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--error);
  border: 1px solid var(--error);
  border-radius: 5px;
  padding: .1rem .4rem;
}

header .logout {
  align-self: center;
  font: inherit;
  font-size: .75rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--rule-strong);
  border-radius: 5px;
  padding: .2rem .6rem;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease;
}
header .logout:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

header .status {
  font-size: .75rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  transition: opacity .4s ease;
  min-width: 4.5rem;
  text-align: right;
}

.auth-hidden { display: none !important; }

/* Zone d'édition : numéros à gauche, saisie au centre, montants à droite. */
.sheet {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
}

.sheet::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: var(--gutter-w);
  width: 1px;
  background: var(--rule);
  pointer-events: none;
}

/* Colonne des numéros de ligne */
.lines {
  width: var(--lines-w);
  flex-shrink: 0;
  background: var(--gutter-bg);
  border-right: 1px solid var(--rule);
  overflow: hidden;
  position: relative;
}
.lines-inner {
  padding: var(--pad-y) 0;
  will-change: transform;
}
.lines-inner .lnum {
  height: var(--line-h);
  line-height: var(--line-h);
  padding-right: .5rem;
  text-align: right;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

#notes {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  color: var(--ink);            /* texte des notes : blanc sur noir */
  caret-color: var(--accent);   /* curseur vert */
  font-family: var(--mono);
  font-size: .95rem;
  line-height: var(--line-h);
  padding: var(--pad-y) var(--pad-x);
  white-space: pre;
  overflow: auto;
  tab-size: 4;
}
#notes::placeholder { color: var(--muted); }

.gutter {
  width: var(--gutter-w);
  flex-shrink: 0;
  background: var(--gutter-bg);
  overflow: hidden;
  position: relative;
}

.gutter-inner {
  padding: var(--pad-y) 0;
  will-change: transform;
}

.gutter-inner .row {
  height: var(--line-h);
  line-height: var(--line-h);
  padding: 0 .9rem;
  text-align: right;
  font-family: var(--mono);
  font-size: .95rem;
  color: var(--result);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.gutter-inner .row.value { cursor: pointer; transition: color .12s ease; }
.gutter-inner .row.value:hover { color: var(--ink); }
.gutter-inner .row.sum {
  font-weight: 700;
  color: var(--accent);
  border-top: 1px solid var(--rule-strong);
}
.gutter-inner .row.error {
  color: var(--error);
  cursor: help;
}
.gutter-inner .row.copied { color: var(--ink); font-weight: 700; }

footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .55rem var(--pad-x);
  border-top: 1px solid var(--rule);
  font-size: .78rem;
  color: var(--muted);
  flex-shrink: 0;
}
footer .spacer { margin-left: auto; }

.help-btn {
  font: inherit;
  font-size: .76rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  padding: .25rem .7rem;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.help-btn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 10px var(--accent-glow);
}

@media (max-width: 560px) {
  :root { --sidebar-w: 200px; --gutter-w: 84px; --lines-w: 36px; }
  header .hint { display: none; }
}

/* --- Écran de chargement (masque l'interface jusqu'à la connexion + données) --- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  background: var(--paper);
  color: var(--muted);
}
.loader.hidden { display: none; }

.loader-logo {
  border-radius: 18px;
  box-shadow: 0 0 0 1px var(--rule-strong), 0 8px 28px rgba(0, 0, 0, .5);
}

.loader-spinner {
  width: 2.2rem;
  height: 2.2rem;
  border: 3px solid var(--rule);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: loader-spin .8s linear infinite;
}
@keyframes loader-spin { to { transform: rotate(360deg); } }

.loader-text {
  margin: 0;
  font-size: .85rem;
  letter-spacing: .04em;
}

/* En cas d'échec : pas de spinner, message plus lisible. */
.loader.error .loader-spinner { display: none; }
.loader.error .loader-text { color: var(--ink); max-width: 28rem; text-align: center; }

@media (prefers-reduced-motion: reduce) {
  .loader-spinner { animation: none; }
}

/* --- Modale d'aide --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, .35);
}
.modal.hidden { display: none; }
.modal-card {
  position: relative;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--rule-strong);
  border-radius: 12px;
  padding: 1.4rem 1.6rem;
  max-width: 34rem;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .55), 0 0 0 1px var(--accent-soft);
}
.modal-card h2 { margin: 0 0 .6rem; font-size: 1.05rem; color: var(--accent); }
.modal-card h3 {
  margin: 1.1rem 0 .4rem;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
.help-intro { margin: 0 0 .4rem; font-size: .86rem; line-height: 1.55; color: var(--muted); }
.help-err { color: var(--error); font-weight: 700; }
.help-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .86rem;
}
.help-table td {
  padding: .3rem .5rem .3rem 0;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
  line-height: 1.5;
}
.help-table td:first-child { white-space: nowrap; width: 1%; padding-right: 1rem; }
.help-table tr:last-child td { border-bottom: 0; }
.help-list { margin: 0; padding-left: 1.1rem; font-size: .86rem; line-height: 1.7; }
.help-list code {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--result);
  background: var(--accent-soft);
  padding: .05rem .3rem;
  border-radius: 4px;
}
.shortcuts { list-style: none; padding-left: 0; }
.shortcuts kbd {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  padding: .05rem .35rem;
}
.modal-close {
  position: absolute;
  top: .7rem;
  right: .8rem;
  font: inherit;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
}
.modal-close:hover { color: var(--ink); }