/* Світла тема */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --line: #e3e6ec;
  --accent: #2f6fed;
  --accent-hover: #2459c7;
  --warn-bg: #fff7e6;
  --warn-line: #f2c36b;
  --err-bg: #fdecec;
  --err-line: #f0a5a5;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
.card {
  max-width: 560px;
  margin: 8vh auto;
  padding: 32px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(31, 36, 48, 0.06);
}
h1 { margin: 0 0 4px; font-size: 22px; }
.sub { margin: 0 0 24px; color: var(--muted); font-size: 14px; }
label { display: block; margin: 16px 0 6px; font-weight: 600; font-size: 14px; }
select, input[type=password], input[type=text] {
  width: 100%;
  padding: 11px 12px;
  background: #fff;
  color: var(--text);
  border: 1px solid #cfd4dd;
  border-radius: 8px;
  font-size: 16px;
}
select:focus, input:focus { outline: 2px solid rgba(47, 111, 237, 0.25); border-color: var(--accent); }
button, .btn {
  display: inline-block;
  margin-top: 22px;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--accent-hover); }
button.ghost, .btn.ghost {
  background: #fff;
  color: var(--text);
  border: 1px solid #cfd4dd;
}
button.ghost:hover, .btn.ghost:hover { background: #f1f3f7; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.note, .warn, .err { margin: 16px 0 0; padding: 12px 14px; border-radius: 8px; font-size: 14px; }
.note { background: #eef3ff; border: 1px solid #cfdcfb; }
.warn { background: var(--warn-bg); border: 1px solid var(--warn-line); }
.err { background: var(--err-bg); border: 1px solid var(--err-line); }
.warn ul { margin: 6px 0 0; padding-left: 20px; }
.foot { margin-top: 24px; font-size: 13px; color: var(--muted); }
.foot form { display: inline; }
.foot button { all: unset; color: var(--accent); cursor: pointer; text-decoration: underline; }

/* Попередній перегляд / Редактор */
.preview-layout {
  max-width: 960px;
  margin: 30px auto;
  padding: 0 16px;
}
.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  background: var(--card);
  padding: 14px 20px;
  border-radius: 10px;
  border: 1px solid var(--line);
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.preview-toolbar .btn, .preview-toolbar button { margin-top: 0; }
.preview-hint { font-size: 13px; color: var(--muted); }
.paper-sheet {
  background: #ffffff;
  padding: 55px 50px;
  border: 1px solid #d8dbe0;
  border-radius: 4px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  min-height: 800px;
  outline: none;
  line-height: 1.4;
  color: #111;
}
.paper-sheet:focus {
  box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.25), 0 8px 30px rgba(0,0,0,0.08);
}
.paper-sheet h1, .paper-sheet .act-title { font-size: 16pt; text-align: center; margin: 0 0 6pt 0; text-transform: uppercase; font-weight: bold; }
.paper-sheet h2, .paper-sheet .act-subtitle { font-size: 12.5pt; text-align: center; margin: 0 0 16pt 0; font-weight: bold; }
.paper-sheet table.works { width: 100%; border-collapse: collapse; margin: 10pt 0; }
.paper-sheet table.works th { background-color: #f3f4f6; border: 1px solid #4b5563; padding: 5pt 7pt; text-align: left; font-weight: bold; }
.paper-sheet table.works td { border: 1px solid #4b5563; padding: 5pt 7pt; vertical-align: top; }
.paper-sheet table.works th.n, .paper-sheet table.works td.n { width: 6%; text-align: center; }
.paper-sheet table.works th.r, .paper-sheet table.works td.r { text-align: right; }
.paper-sheet table.cols { width: 100%; border-collapse: collapse; margin: 10pt 0; }
.paper-sheet td.col { vertical-align: top; width: 50%; padding-right: 18pt; }
.paper-sheet td.col:last-child { padding-right: 0; padding-left: 18pt; }