:root {
  --accent: #145090;
  --accent-deep: #0f3d6e;
  --accent-soft: #EEF3F9;
  --white: #FFFFFF;
  --black: #1A1A1A;
  --grey-dark: #464646;
  --grey-medium: #9E9E9E;
  --grey-light: #F5F5F5;
  --border: #E0E0E0;
  --green: #2E7D32;
  --red: #F41C22;
  --heading: 'Montserrat', Arial, Helvetica, sans-serif;
  --body: 'Open Sans', Calibri, Arial, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; background: var(--white); color: var(--black); font: 14px/1.4 var(--body); }
body { display: flex; flex-direction: column; }
button, input, select, textarea { font: inherit; color: inherit; }

button {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--white);
  cursor: pointer;
}
button:hover { background: var(--grey-light); }
button:disabled { opacity: .45; cursor: default; }
button.solid { background: var(--accent); border-color: var(--accent); color: var(--white); font-weight: 600; }
button.solid:hover { background: var(--accent-deep); }
button.warn { color: var(--red); border-color: var(--red); }
.grow { flex: 1; }

/* Bandes d'entête et de bas de page (couleur accent) */
.topbar, .bottombar { display: flex; align-items: center; gap: 8px; background: var(--accent); color: var(--white); }
.topbar { flex-wrap: wrap; padding: 8px 16px; }
.bottombar { justify-content: space-between; padding: 4px 16px; font-size: 12px; }
.brand { margin-right: 12px; font: 700 18px var(--heading); letter-spacing: .5px; }
.topbar button { background: transparent; border-color: rgba(255, 255, 255, .5); color: var(--white); }
.topbar button:hover { background: rgba(255, 255, 255, .15); }
.topbar button.solid, .topbar .scale button.on { background: var(--white); border-color: var(--white); color: var(--accent); }
.topbar select { min-width: 220px; padding: 5px 8px; border: none; border-radius: 4px; background: var(--white); color: var(--black); }
.scale { display: inline-flex; }
.scale button { border-radius: 0; }
.scale button + button { margin-left: -1px; }
.scale button:first-child { border-radius: 4px 0 0 4px; }
.scale button:last-child { border-radius: 0 4px 4px 0; }

/* Diagramme : colonne des tâches figée à gauche, entête figée en haut */
#viewport { flex: 1; overflow: auto; }
#chart { display: grid; min-height: 100%; }
#placeholder { margin: 0; padding: 48px 16px; text-align: center; color: var(--grey-dark); font-size: 16px; }

.corner, .timehead { position: sticky; top: 0; height: 48px; background: var(--white); border-bottom: 1px solid var(--border); }
.timehead { z-index: 3; }
.corner { left: 0; z-index: 4; border-right: 1px solid var(--border); }
.tasklist { position: sticky; left: 0; z-index: 2; background: var(--white); border-right: 1px solid var(--border); }

.line {
  display: grid;
  grid-template-columns: 1fr 110px 84px 84px 44px;
  gap: 6px;
  align-items: center;
  height: 34px;
  padding: 0 10px;
  border-bottom: 1px solid var(--grey-light);
  white-space: nowrap;
}
.line > span { overflow: hidden; text-overflow: ellipsis; }
.line .num { text-align: right; }
.corner .line { height: 48px; border: none; color: var(--grey-dark); font: 600 12px var(--heading); text-transform: uppercase; letter-spacing: .4px; }
.line.phase { background: var(--grey-light); font: 600 13px var(--heading); }
.line.task { cursor: pointer; }
.line.task:hover { background: var(--accent-soft); }
.line.task.inphase .name { padding-left: 16px; }
.line.milestone .name::before { content: "◆ "; color: var(--accent); }
.line .late { color: var(--red); font-weight: 600; }
.line .done { color: var(--green); }

svg { display: block; }
svg text { font-family: var(--body); }
.bar { cursor: grab; }
.bar .grip { fill: transparent; cursor: ew-resize; }
.bar:hover .grip { fill: rgba(0, 0, 0, .25); }
body.dragging, body.dragging .bar { cursor: grabbing; user-select: none; }

/* Fenêtres */
dialog {
  width: min(560px, calc(100vw - 32px));
  padding: 20px 24px;
  border: none;
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
}
dialog::backdrop { background: rgba(0, 0, 0, .35); }
dialog h2 { margin: 0 0 12px; font: 700 18px var(--heading); }
dialog label { display: flex; flex: 1; flex-direction: column; gap: 3px; margin-bottom: 10px; color: var(--grey-dark); font-size: 12px; }
dialog input, dialog select, dialog textarea {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--white);
  color: var(--black);
  font-size: 14px;
}
.pair { display: flex; gap: 12px; }
fieldset { margin: 0 0 10px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px; }
legend { padding: 0 4px; color: var(--grey-dark); font-size: 12px; }
#depChoices { display: flex; flex-direction: column; gap: 2px; max-height: 140px; overflow: auto; }
#depChoices label { flex-direction: row; align-items: center; gap: 6px; margin: 0; color: var(--black); font-size: 13px; }
#depChoices input { width: auto; }
#depChoices .empty { color: var(--grey-medium); font-size: 13px; }
#askInput { margin-bottom: 8px; }
.meta { margin: 0 0 4px; color: var(--grey-medium); font-size: 12px; }
.error { margin: 0 0 8px; color: var(--red); font-size: 13px; }
.error:empty, .meta:empty { display: none; }
.buttons { display: flex; gap: 8px; margin-top: 8px; }