:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #dde3ea;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #059669;
  --danger: #dc2626;
  --sel: #2563eb;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

body { display: flex; flex-direction: column; }

.hidden { display: none !important; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; }
.brand-icon { font-size: 22px; }

.toolbar { display: flex; align-items: center; gap: 8px; flex: 1; flex-wrap: wrap; }
.toolbar .spacer { flex: 1; }
.toolbar .sep { width: 1px; height: 24px; background: var(--border); margin: 0 4px; }

/* ---------- buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background .12s, border-color .12s, opacity .12s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: #eef2f7; }
.btn:disabled { opacity: .45; cursor: default; }
.btn-icon { padding: 8px 10px; font-size: 15px; }
.btn-lg { padding: 12px 22px; font-size: 16px; }

.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; font-weight: 600; }
.btn-success:hover:not(:disabled) { background: #047857; }

.btn-danger-outline { color: var(--danger); }
.btn-danger-outline:hover:not(:disabled) { background: #fef2f2; border-color: #fca5a5; }

/* ---------- main ---------- */
#main { flex: 1; overflow: auto; display: flex; flex-direction: column; }

/* dropzone */
.dropzone {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 24px;
  border: 2px dashed #b8c2cf;
  border-radius: 16px;
  background: #fbfcfe;
  transition: border-color .15s, background .15s;
}
.dropzone.dragover, body.dragover-page .dropzone { border-color: var(--primary); background: #eff6ff; }
.dropzone-inner { text-align: center; color: var(--muted); padding: 40px; }
.dropzone-icon { font-size: 52px; margin-bottom: 8px; }
.dropzone-inner h2 { color: var(--text); margin: 8px 0; font-size: 22px; }
.privacy-note { margin-top: 28px; font-size: 13px; }

/* ---------- workspace ---------- */
.workspace { flex: 1; display: flex; flex-direction: column; min-height: 0; }

.selectbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 20px;
  font-size: 13.5px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: #fafbfd;
  flex-wrap: wrap;
}
.chk { display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--text); }
.sel-info { font-weight: 600; color: var(--primary); }
.hint { margin-left: auto; }

.work-body { flex: 1; display: flex; min-height: 0; }

.grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 14px;
  padding: 18px 20px 40px;
  overflow-y: auto;
  align-content: start;
}

/* ---------- toggle vista ---------- */
.view-toggle { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.vt {
  appearance: none;
  border: none;
  background: var(--panel);
  padding: 5px 12px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}
.vt + .vt { border-left: 1px solid var(--border); }
.vt.active { background: var(--primary); color: #fff; }

/* ---------- modalità anteprima ---------- */
.preview { display: none; }
.workspace.preview-mode .grid {
  flex: 0 0 224px;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 12px;
  border-right: 1px solid var(--border);
  background: #fafbfd;
}
.workspace.preview-mode .thumb-wrap { height: 150px; }
.workspace.preview-mode .card-actions { display: none; }
/* nella colonna verticale l'indicatore di inserimento è orizzontale */
.workspace.preview-mode .card.drop-before::before {
  left: 6px; right: 6px; top: -8px; bottom: auto;
  width: auto; height: 4px;
}
.workspace.preview-mode .card.drop-after::after {
  left: 6px; right: 6px; bottom: -8px; top: auto;
  width: auto; height: 4px;
}
.workspace.preview-mode .card.current { border-color: #111827; box-shadow: 0 0 0 3px rgba(17, 24, 39, .15); }
.workspace.preview-mode .card.current.selected { border-color: var(--sel); box-shadow: 0 0 0 3px rgba(37, 99, 235, .28); }

.workspace.preview-mode .preview {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.preview-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  flex-wrap: wrap;
}
.preview-bar .spacer { flex: 1; }
.pv-info { font-size: 13.5px; font-weight: 600; min-width: 64px; text-align: center; }
.pv-zoom { font-size: 12.5px; color: var(--muted); min-width: 44px; text-align: center; }

.pv-canvas-wrap {
  flex: 1;
  overflow: auto;
  background: #e8ebf1;
  display: grid;
  place-items: center;
  padding: 18px;
}
#pvCanvas {
  background: #fff;
  box-shadow: 0 2px 14px rgba(15, 23, 42, .22);
  border-radius: 2px;
  max-width: none;
}

/* ---------- page card ---------- */
.card {
  position: relative;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 8px 4px;
  cursor: grab;
  user-select: none;
  transition: border-color .1s, box-shadow .1s, transform .1s;
}
.card:hover { border-color: #b9c6d8; }
.card.selected { border-color: var(--sel); box-shadow: 0 0 0 3px rgba(37, 99, 235, .18); }
.card.dragging { opacity: .35; }
.card.drop-before::before,
.card.drop-after::after {
  content: "";
  position: absolute;
  top: 6px; bottom: 6px;
  width: 4px;
  border-radius: 2px;
  background: var(--primary);
}
.card.drop-before::before { left: -9px; }
.card.drop-after::after { right: -9px; }

.thumb-wrap {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f1f3f7;
  border-radius: 6px;
}
.thumb-wrap img {
  max-width: 100%;
  max-height: 100%;
  box-shadow: 0 0 0 1px rgba(0,0,0,.08);
  background: #fff;
  transition: transform .15s;
  pointer-events: none;
}
.rot-90  img { transform: rotate(90deg)  scale(var(--fit, 1)); }
.rot-180 img { transform: rotate(180deg); }
.rot-270 img { transform: rotate(270deg) scale(var(--fit, 1)); }

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 2px 2px;
  font-size: 12px;
  color: var(--muted);
}
.page-num { font-weight: 700; color: var(--text); }
.src-tag {
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 1px 7px;
  border-radius: 20px;
  font-size: 11px;
  color: #fff;
}

/* hover mini-actions */
.card-actions {
  position: absolute;
  top: 12px; right: 12px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity .12s;
}
.card:hover .card-actions { opacity: 1; }
.mini {
  border: none;
  border-radius: 6px;
  width: 26px; height: 26px;
  font-size: 13px;
  cursor: pointer;
  background: rgba(17, 24, 39, .72);
  color: #fff;
}
.mini:hover { background: rgba(17, 24, 39, .9); }
.mini.mini-del:hover { background: var(--danger); }

.card-check {
  position: absolute;
  top: 12px; left: 12px;
  width: 18px; height: 18px;
  accent-color: var(--sel);
  cursor: pointer;
}

/* ---------- status bar ---------- */
.statusbar {
  display: flex;
  justify-content: space-between;
  padding: 6px 16px;
  font-size: 12.5px;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--border);
}

/* ---------- dialog ---------- */
dialog {
  border: none;
  border-radius: 14px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
  padding: 0;
  width: min(440px, 92vw);
}
dialog::backdrop { background: rgba(15, 23, 42, .45); }
.dlg { padding: 22px 24px; }
.dlg h3 { margin: 0 0 16px; }
.radio-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; cursor: pointer; }
.num { width: 64px; padding: 4px 6px; border: 1px solid var(--border); border-radius: 6px; }
.txt { width: 200px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px; }
.dlg-note { font-size: 12.5px; color: var(--muted); }
.field-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 14px; }
.field-row label { min-width: 130px; color: var(--muted); }
.field-row .txt { flex: 1; }
.name-row { display: flex; align-items: center; gap: 6px; }
.name-input { flex: 1; padding: 8px 10px !important; font-size: 15px; }
.name-ext { color: var(--muted); font-size: 15px; }
.dlg-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* ---------- busy overlay ---------- */
.busy {
  position: fixed; inset: 0;
  background: rgba(255,255,255,.65);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
}
.busy-box {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 22px;
  box-shadow: var(--shadow);
  font-weight: 600;
}
.spinner {
  width: 22px; height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- pagina convertitore ---------- */
.page-link { text-decoration: none; display: inline-flex; align-items: center; }
.target-label { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
.target-sel { padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel); font-size: 14px; }
.conv-banner {
  margin: 14px 20px 0;
  padding: 10px 16px;
  border: 1px solid #fcd34d;
  background: #fffbeb;
  color: #92400e;
  border-radius: 10px;
  font-size: 14px;
}
.demo-banner {
  border-color: #93c5fd;
  background: #eff6ff;
  color: #1e40af;
}
.demo-banner a { color: #1d4ed8; font-weight: 600; }
.queue-wrap { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.queue { flex: 1; overflow-y: auto; padding: 12px 20px; display: flex; flex-direction: column; gap: 8px; align-content: start; }
.qrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  box-shadow: var(--shadow);
}
.qrow-fatto { border-color: #a7f3d0; }
.qrow-errore { border-color: #fecaca; background: #fffafa; }
.qname { font-size: 14.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qsize { font-weight: 400; color: var(--muted); font-size: 12.5px; margin-left: 10px; }
.qstatus { display: flex; align-items: center; gap: 12px; font-size: 13.5px; color: var(--muted); white-space: nowrap; }
.qdl { padding: 5px 10px; font-size: 13px; }
.queue-actions { display: flex; gap: 10px; padding: 10px 20px 16px; }

/* link convertitore nella pagina organizzatore */
.tool-link { font-size: 13px; color: var(--primary); text-decoration: none; white-space: nowrap; }
.tool-link:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .hint { display: none; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .thumb-wrap { height: 140px; }
}