/*
 * Excalibur's Sheath
 * Layout
 *
 * Native CSS Grid/Flexbox replacement for the
 * old Bootstrap-derived container/row/column layout.
 */

:root {
  --site-width: 960px;
  --content-width: 760px;
  --page-padding: 1rem;
}

/* Overall page */
body {
  text-align: center;
}

/*
 * Centered site container.
 *
 * This replaces the old Bootstrap-style
 * .container / .row / .col-lg-8 / offset layout.
 */
.site-container {
  width: min(
    var(--site-width),
    calc(100% - (2 * var(--page-padding)))
  );

  margin-left: auto;
  margin-right: auto;
}

/*
 * Main reading column.
 *
 * Kept narrower than the overall site width so
 * long-form articles remain comfortable to read.
 */
.content-column {
  width: min(100%, var(--content-width));
  margin-left: auto;
  margin-right: auto;
}

/* Header */
.site-header {
  width: 100%;
}

/* Main content */
main {
  width: 100%;
  text-align: left;
}

/* Footer */
.site-footer {
  width: min(
    var(--site-width),
    calc(100% - (2 * var(--page-padding)))
  );

  margin-left: auto;
  margin-right: auto;
}

/* Flexible horizontal navigation */
.menu ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;

  gap: 0.75rem;

  margin: 0;
  padding: 0;

  list-style: none;
}

.menu li {
  margin: 0;
}

/* Responsive media */
img,
video,
iframe {
  max-width: 100%;
}

/* Responsive iframe wrapper behavior */
iframe {
  width: 100%;
}

/* Tablet / narrow desktop */
@media (max-width: 900px) {
  :root {
    --site-width: 100%;
    --content-width: 680px;
    --page-padding: 1rem;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --content-width: 100%;
    --page-padding: 0.75rem;
  }

  .menu ul {
    gap: 0.5rem;
  }
}