/* app/styles/worksheet.css — builder chrome (screen only).
 *
 * Line 1 pulls print.css in FOR SCREEN so the live preview is styled by the
 * exact same rules that will print. print.css is also linked separately with
 * media="print" in worksheet.html; that copy carries @page and the
 * print-only overrides.
 *
 * Everything this file defines itself lives inside @media screen, so the
 * builder UI contributes ZERO declarations to the print cascade — in
 * particular the preview's scale transform simply does not exist when the
 * page is printed.
 */

@import url("print.css") screen;

@media screen {

  /* ---------------------------------------------------------------- tokens */
  :root {
    --accent: #4f46e5;
    --accent-dark: #4338ca;
    --accent-soft: #eef2ff;
    --ink: #0f172a;
    --ink-2: #334155;
    --muted: #64748b;
    --line: #e2e8f0;
    --line-2: #cbd5e1;
    --pane-bg: #f1f5f9;
    --warn: #b45309;
    --warn-bg: #fef3c7;
    --danger: #dc2626;
    --rail-w: 320px;
    --ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  }

  *, *::before, *::after { box-sizing: border-box; }

  html, body { height: 100%; }

  body {
    margin: 0;
    display: flex;
    flex-direction: column;
    font-family: var(--ui);
    font-size: 13.5px;
    color: var(--ink);
    background: #fff;
    -webkit-font-smoothing: antialiased;
  }

  /* ---------------------------------------------------------------- header */
  .app-header {
    flex: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 52px;
    padding: 0 16px;
    border-bottom: 1px solid var(--line);
    background: #fff;
  }

  .app-header h1 {
    margin: 0;
    font-size: 15px;
    font-weight: 650;
    letter-spacing: -0.01em;
  }

  .app-header h1 .dim { color: var(--muted); font-weight: 500; }

  .app-header__link {
    color: var(--accent);
    text-decoration: none;
    font-size: 13px;
    font-weight: 550;
    padding: 6px 10px;
    border-radius: 7px;
  }
  .app-header__link:hover { background: var(--accent-soft); }

  /* ----------------------------------------------------------- two panes */
  .builder {
    flex: 1 1 auto;
    min-height: 0;
    display: grid;
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
  }

  .rail {
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 4px 14px 40px;
    border-right: 1px solid var(--line);
    background: #fff;
  }

  .rail__sec {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  .rail__sec:last-child { border-bottom: 0; }

  .rail__sec h2 {
    margin: 0 0 9px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .rail__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 9px;
  }
  .rail__head h2 { margin: 0; }

  /* ---------------------------------------------------------------- fields */
  .field { display: block; margin-bottom: 10px; }
  .field:last-child { margin-bottom: 0; }

  .field__label {
    display: block;
    margin-bottom: 4px;
    font-size: 12px;
    font-weight: 550;
    color: var(--ink-2);
  }

  .field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
  }
  .field-row .field__label { margin-bottom: 0; }

  input[type="text"],
  input[type="number"],
  select {
    width: 100%;
    font: inherit;
    font-size: 13px;
    color: var(--ink);
    padding: 6px 8px;
    border: 1px solid var(--line-2);
    border-radius: 7px;
    background: #fff;
  }

  input[type="text"]:focus-visible,
  input[type="number"]:focus-visible,
  select:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
  }

  input.is-bad,
  input.is-bad:focus-visible {
    border-color: var(--danger);
    outline-color: var(--danger);
    background: #fef2f2;
  }

  .check {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-2);
    cursor: pointer;
  }
  .check input { accent-color: var(--accent); width: 15px; height: 15px; margin: 0; }

  .hint {
    margin: 6px 0 0;
    font-size: 11.5px;
    color: var(--muted);
  }

  /* --------------------------------------------------------- segmented set */
  .seg {
    display: inline-flex;
    padding: 2px;
    border: 1px solid var(--line-2);
    border-radius: 8px;
    background: #f8fafc;
  }

  .seg button {
    font: inherit;
    font-size: 12.5px;
    font-weight: 550;
    color: var(--ink-2);
    padding: 4px 12px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    white-space: nowrap;
  }
  .seg button:hover { color: var(--ink); }
  .seg button.is-on {
    background: #fff;
    color: var(--accent);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.12);
  }

  /* ----------------------------------------------------------------- chips */
  .chip {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-dark);
    font-size: 11.5px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
  }
  .chip.is-warn { background: var(--warn-bg); color: var(--warn); }
  .chip.is-empty { background: #f1f5f9; color: var(--muted); }

  .warn {
    margin: 9px 0 0;
    padding: 7px 9px;
    border-radius: 7px;
    background: var(--warn-bg);
    color: var(--warn);
    font-size: 11.5px;
    line-height: 1.35;
  }

  /* ------------------------------------------------------------ skill tree */
  .tree { margin: 0 -4px; }

  .lvl, .tpc { border-radius: 8px; }

  .lvl > summary,
  .tpc > summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .lvl > summary::-webkit-details-marker,
  .tpc > summary::-webkit-details-marker { display: none; }

  .lvl > summary::before,
  .tpc > summary::before {
    content: "";
    flex: none;
    width: 0;
    height: 0;
    border-left: 4.5px solid currentColor;
    border-top: 3.5px solid transparent;
    border-bottom: 3.5px solid transparent;
    opacity: 0.55;
    transition: transform 0.12s ease;
  }
  .lvl[open] > summary::before,
  .tpc[open] > summary::before { transform: rotate(90deg); }

  .lvl > summary {
    padding: 6px 4px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .lvl > summary:hover { color: var(--ink-2); }

  .lvl__count {
    margin-left: auto;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: none;
    color: var(--accent);
  }
  .lvl__count:empty { display: none; }

  .tpc { margin: 0 0 2px 6px; }

  .tpc > summary {
    padding: 5px 4px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--ink-2);
  }
  .tpc > summary:hover { color: var(--ink); }

  .tpc__ref {
    margin-left: auto;
    padding: 1px 6px;
    border-radius: 4px;
    background: #f1f5f9;
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 500;
    color: var(--muted);
  }

  .skills { padding: 1px 0 6px 12px; }

  .skill {
    padding: 2px 0;
    border-left: 2px solid transparent;
    padding-left: 6px;
  }
  .skill.is-on { border-left-color: var(--accent); }

  .skill__row {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    padding: 3px 0;
    cursor: pointer;
  }

  .skill__cb {
    flex: none;
    width: 14px;
    height: 14px;
    margin: 1px 0 0;
    accent-color: var(--accent);
  }

  .skill__title {
    flex: 1 1 auto;
    font-size: 12.5px;
    line-height: 1.3;
    color: var(--ink-2);
  }
  .skill.is-on .skill__title { color: var(--ink); font-weight: 550; }

  .skill__info {
    flex: none;
    width: 14px;
    height: 14px;
    margin-top: 1px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #475569;
    font-size: 9.5px;
    font-weight: 700;
    line-height: 14px;
    text-align: center;
    cursor: help;
  }

  .skill__opts {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 0 5px 21px;
  }
  .skill__opts[hidden] { display: none; }

  /* ---------------------------------------------------- per-tier counters
     One small counter per tier the skill supports, plus Mix — so a single
     skill can contribute e.g. 5 × T1 + 5 × T2 + 5 × T3. */
  .tiercounts {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 6px;
    min-width: 0;
  }

  .tc {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 4px 2px 7px;
    border: 1px solid var(--line-2);
    border-radius: 7px;
    background: #fff;
    cursor: default;
  }
  .tc.is-nonzero {
    border-color: var(--accent);
    background: var(--accent-soft);
  }

  .tc__lbl {
    font-size: 10.5px;
    font-weight: 700;
    color: var(--ink-2);
    letter-spacing: .02em;
  }
  .tc.is-nonzero .tc__lbl { color: var(--accent-dark); }

  .tc__n {
    width: 40px;
    height: 24px;
    padding: 0 2px;
    border: 0;
    background: transparent;
    text-align: center;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
  }
  .tc__n:focus { outline: none; }
  .tc:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
  }

  /* --------------------------------------------------------------- buttons */
  .rail__sec--actions {
    display: flex;
    gap: 8px;
    position: sticky;
    bottom: 0;
    padding: 12px 0;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), #fff 35%);
  }

  .btn {
    flex: 1 1 auto;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 10px;
    border: 1px solid var(--line-2);
    border-radius: 8px;
    background: #fff;
    color: var(--ink-2);
    cursor: pointer;
    white-space: nowrap;
  }
  .btn:hover { background: #f8fafc; color: var(--ink); }

  .btn--primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
  }
  .btn--primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }

  .btn.is-done {
    border-color: #16a34a;
    background: #f0fdf4;
    color: #15803d;
  }

  .seed-row { display: flex; gap: 6px; }

  .seed-row input {
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .seed-row button {
    flex: none;
    width: 34px;
    font: inherit;
    font-size: 15px;
    line-height: 1;
    border: 1px solid var(--line-2);
    border-radius: 7px;
    background: #fff;
    color: var(--ink-2);
    cursor: pointer;
  }
  .seed-row button:hover { background: var(--accent-soft); color: var(--accent-dark); }

  /* --------------------------------------------------------------- recents */
  .recents { list-style: none; margin: 0; padding: 0; }

  .recents__empty {
    margin: 0;
    font-size: 11.5px;
    color: var(--muted);
  }

  .recent__btn {
    display: block;
    width: 100%;
    text-align: left;
    font: inherit;
    padding: 6px 8px;
    margin-bottom: 2px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    cursor: pointer;
  }
  .recent__btn:hover { background: #f8fafc; }

  .recent__title {
    display: block;
    font-size: 12.5px;
    font-weight: 550;
    color: var(--ink-2);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .recent__meta {
    display: block;
    margin-top: 1px;
    font-size: 11px;
    color: var(--muted);
  }

  /* ---------------------------------------------------- preview + scaler */
  .preview-pane {
    overflow: auto;
    /* Reserve the scrollbar gutter permanently. Without it the fit-to-width
       scale and the scrollbar can chase each other: smaller scale -> shorter
       sheet -> scrollbar disappears -> pane wider -> bigger scale -> ... */
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
    padding: 24px;
    background: var(--pane-bg);
  }

  /* .sheet-frame reserves the SCALED footprint so the pane scrolls correctly
     and the sheet stays centred; .sheet-scaler keeps its true 210mm layout
     width and is visually shrunk with a transform. Both --sheet-* custom
     properties are set inline by app/worksheet.js. A custom property is inert
     on its own, so nothing here can leak into the print cascade. */
  .sheet-frame {
    width: calc(210mm * var(--sheet-scale, 1));
    height: var(--sheet-frame-h, auto);
    margin: 0 auto;
  }

  .sheet-scaler {
    width: 210mm;
    transform: scale(var(--sheet-scale, 1));
    transform-origin: top left;
  }

  /* The real print DOM, dressed as a sheet of A4. Padding here mirrors the
     @page margin so the preview is honest; print.css strips it (padding: 0)
     because the printer applies the margin itself. */
  .print-root {
    position: relative;
    width: 210mm;
    min-height: 297mm;
    padding: 13mm 12mm;
    background: #fff;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08), 0 10px 30px rgba(15, 23, 42, 0.13);
  }

  /* Page-cut guides: A4 minus both margins = 271mm of content per page. */
  .print-root::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 13mm;
    bottom: 0;
    pointer-events: none;
    background: repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent calc(271mm - 1px),
      rgba(79, 70, 229, 0.28) calc(271mm - 1px),
      rgba(79, 70, 229, 0.28) 271mm
    );
  }

  /* Belt and braces: if a print run somehow evaluates these screen rules,
     the transform is still dropped. (html.printing is set on beforeprint.) */
  html.printing .sheet-scaler { transform: none !important; }
  html.printing .sheet-frame { width: auto !important; height: auto !important; }

  /* ------------------------------------------------- preview placeholders */
  .ws-empty, .ws-error {
    padding: 34mm 0;
    text-align: center;
  }

  .ws-empty__title, .ws-error__title {
    margin: 0 0 5px;
    font-family: var(--ui);
    font-size: 15px;
    font-weight: 600;
    color: var(--ink-2);
  }

  .ws-empty__body, .ws-error__body {
    margin: 0;
    font-family: var(--ui);
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--muted);
  }

  .ws-error__title { color: var(--danger); }
  .ws-error__body { font-family: var(--mono); font-size: 11.5px; }

  /* ----------------------------------------------------------------- toast */
  .toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    transform: translateX(-50%);
    z-index: 50;
    max-width: min(520px, calc(100vw - 32px));
    padding: 9px 14px;
    border-radius: 9px;
    background: rgba(15, 23, 42, 0.94);
    color: #fff;
    font-size: 12.5px;
    line-height: 1.35;
    box-shadow: 0 6px 24px rgba(15, 23, 42, 0.3);
  }
  .toast[hidden] { display: none; }

  /* --------------------------------------------------------- narrow screens */
  @media (max-width: 900px) {
    .builder { grid-template-columns: 1fr; }
    .rail { border-right: 0; border-bottom: 1px solid var(--line); max-height: 55vh; }
    .preview-pane { padding: 14px; }
  }
}