/* 1. _______________ STARTPAGE _______________ */
#main-content .intro{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.intro img {
    max-width: 90%;
}

#main-content .intro p{
    font-size: var(--fs-h3);
}

.intro-buttons{
    display: flex;
    gap: var(--space-m);
}

.features{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-m);
    flex-wrap: wrap;
}

/* 2. _______________ ABOUT US _______________ */

.about-us-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-l);
}

.about-us-images img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    border-radius: 8px;
}

.about-us-image{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

@media (max-width: 768px) {
  #main-content .intro{
    grid-template-columns: 1fr;
  }

  .intro img{
    width: 100%;
    margin: 0 auto;
  }
  .about-us-images {
    grid-template-columns: 1fr;
  }

  .features{
    grid-template-columns: 1fr;
  }

  .intro-buttons{
    justify-content: center;
  }
}
/* 3. _______________ WORKSHEET GRID (basic) _______________ */
#worksheet-root{
  display: flex;
  justify-content: center;
  margin: 1rem 0 2rem;
}

.worksheet-cell{
  display: flex;
  justify-content: center;
  align-items: center;
  background: transparent;
  font-size: var(--fs-h2);
}

.worksheet-grid{
  border: 4px solid var(--color-text);
}

/* Make the outside border of the whole grid darker, like a document frame */


.worksheet-cell.is-cursor{
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  z-index: 1;
}

.worksheet-cell.is-cursor{
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  z-index: 1;
  animation: cursor-idle 1s linear infinite;
}

@keyframes cursor-idle {
  0% {outline: 2px solid var(--color-primary); outline-offset: -2px; }
  50% {outline: 4px solid var(--color-primary); outline-offset: 0px; }
}

@media print{
  /* margin can be overridden via CSS var if set by PDFExporter */
  @page{ size: A4 portrait; margin: var(--print-margin-mm, 10mm); }
  header, footer, nav, .button, button{ display: none !important; }
  /* Keep the selected cell visible on print; just remove its outline */
  .is-cursor{ outline: none !important; }
    /* remove layout constraints so grid can use full printable width */
    body.container, .container{ max-width: none !important; padding: 0 !important; margin: 0 !important; }
    #main-content, #worksheet-root{ width: 100% !important; margin: 0 !important; padding: 0 !important; justify-content: flex-start; }
    .worksheet-grid{
        width: calc(var(--page-width-mm, 210mm) - 2 * var(--print-margin-mm, 10mm));
        grid-template-columns: repeat(var(--cols), 1fr) !important;
        grid-auto-rows: calc((var(--page-width-mm, 210mm) - 2 * var(--print-margin-mm, 10mm)) / var(--cols)) !important;
    }
  .worksheet-cell{
    border: none;
    width: auto !important;
    height: auto !important;
    font-size: calc((var(--page-width-mm, 210mm) - 2 * var(--print-margin-mm, 10mm)) / var(--cols) * 0.8) !important;
    line-height: 1 !important;
  }
}

/* Operation visuals (needed for + formatting and results) */
.worksheet-cell.underline{ border-bottom: 1px solid #000 !important; }
.worksheet-cell.result{ color: var(--color-primary); }
.worksheet-cell.result-correct{ color: var(--color-primary); }
.worksheet-cell.result-wrong{ color: var(--color-red); }
.worksheet-cell.box-selected{ background: var(--color-primary-bg-20); }