:root {
  --doc-width-mm: 336.984;
  --margin-mm: 5;
  --column-width-mm: 22.222;
  --gutter-mm: 3.175;
  --baseline-pt: 11;

  /* fallback px (seront écrasés par script.js) */
  --margin-px: 16px;
  --column-width-px: 100px;
  --gutter-px: 14px;
  --baseline-px: 16px;
}

/* Reset */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
}

.page {
  position: fixed;
  inset: 0;
  background: #ffffff;
  overflow: hidden;
  z-index: 0;
}

/* =====================
   GRILLE & REPÈRES
   ===================== */
.grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.grid::before {
  content: "";
  position: absolute;
  top: var(--margin-px);
  bottom: var(--margin-px);
  left: var(--margin-px);
  right: var(--margin-px);
  background-image: repeating-linear-gradient(
    to right,
    rgba(255, 0, 0, 0.15) 0,
    rgba(255, 0, 0, 0.15) var(--column-width-px),
    transparent var(--column-width-px),
    transparent calc(var(--column-width-px) + var(--gutter-px))
  );
  background-size: calc(13 * (var(--column-width-px) + var(--gutter-px)) - var(--gutter-px)) 100%;
}

.grid::after {
  content: "";
  position: absolute;
  top: var(--margin-px);
  left: var(--margin-px);
  right: var(--margin-px);
  bottom: var(--margin-px);
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 255, 0.15) 1px,
    transparent 1px,
    transparent var(--baseline-px)
  );
  pointer-events: none;
  z-index: 1;
}

.baseline-marker {
  position: absolute;
  left: var(--margin-px);
  right: var(--margin-px);
  height: 1px;
  background: red;
  top: var(--margin-px);
  z-index: 500;
  opacity: 0.8;
  pointer-events: none;
}

.baseline-marker-bottom {
  position: absolute;
  left: var(--margin-px);
  right: var(--margin-px);
  height: 1px;
  background: red;
  bottom: var(--margin-px);
  z-index: 500;
  opacity: 0.8;
  pointer-events: none;
}

/* =====================
   TEXTE (colonnes 1–3)
   ===================== */
.text-block {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--margin-px);
  width: calc(3 * var(--column-width-px) + 2 * var(--gutter-px));
  height: 100vh;
  overflow-y: auto;
  box-sizing: border-box;
  font-family: Helvetica, Arial, sans-serif;
  font-weight: 500;
  color: black;
  padding: 0;
  z-index: 1000;
  pointer-events: auto;
  scroll-padding-bottom: var(--margin-px);
}

.text-inner {
  position: relative;
  padding-top: 0;
  padding-bottom: 0;
}

.text-block::-webkit-scrollbar {
  display: none;
}

.text-block p {
  margin: 0;
  padding: 0;
}

[data-project] {
  cursor: pointer;
  text-decoration: underline;
}

/* =====================
   ZONE PROJET (colonnes 4–13 → 10 colonnes)
   ===================== */
.project-viewer {
  position: absolute;
  top: var(--margin-px);
  bottom: var(--margin-px);
  left: calc(
    var(--margin-px) + 
    3 * var(--column-width-px) + 
    3 * var(--gutter-px)
  );
  width: calc(
    10 * var(--column-width-px) + 
    9 * var(--gutter-px)
  );
  background: transparent;
  overflow: hidden;
  z-index: 50;
  display: flex;
  justify-content: center;
  align-items: center;
  isolation: isolate;
}

.project-viewer img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Contrôles UI */
.project-viewer .ui-control {
  position: absolute;
  font-family: Helvetica, Arial, sans-serif;
  font-weight: 500;
  font-size: var(--baseline-px);
  line-height: var(--baseline-px);
  cursor: pointer;
  user-select: none;
  z-index: 200;
  opacity: 0.8;
}

.project-viewer .ui-control:hover {
  opacity: 1;
}

.project-viewer .close-x {
  top: 0;
  right: 0;
}

.project-viewer .prev-arrow {
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.project-viewer .next-arrow {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}