/* =====================================================================
 * Small-screen layout for CyberLessons101.
 * Everything here is inside max-width media queries, so the desktop
 * layout (1024px and up) is untouched.
 * Markup hooks (added to every page by apply-mobile.py):
 *   .cl-nav-links  - the existing top-menu link row
 *   .cl-nav-toggle - the hamburger button
 * ===================================================================== */

/* hamburger is desktop-hidden */
.cl-nav-toggle { display: none; }

/* --------------------------------------------------------------------
 * Collapsed top menu (below Tailwind's lg breakpoint; the full menu
 * needs ~1000px of width)
 * ------------------------------------------------------------------ */
@media (max-width: 1023.98px) {
  .cl-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 0.5rem;
    border: 1px solid rgb(255 255 255 / 0.1);
    color: #e2e8f0;
    background: transparent;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
  }
  .cl-nav-toggle:hover,
  .cl-nav-toggle[aria-expanded="true"] {
    color: rgb(14 165 233);
    border-color: rgb(14 165 233 / 0.5);
    background: rgb(14 165 233 / 0.08);
  }
  .cl-nav-toggle svg { width: 1.5rem; height: 1.5rem; }
  .cl-nav-toggle .cl-icon-close { display: none; }
  .cl-nav-toggle[aria-expanded="true"] .cl-icon-open { display: none; }
  .cl-nav-toggle[aria-expanded="true"] .cl-icon-close { display: block; }

  /* the link row becomes a drop-down panel under the header bar */
  .cl-nav-links { display: none !important; }
  nav.cl-open .cl-nav-links {
    display: flex !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0 !important;
    margin: 0 !important;
    padding: 0.5rem 0 0.75rem;
    max-height: calc(100vh - 4rem);
    max-height: calc(100dvh - 4rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    font-size: 1rem;
    background-color: rgb(2 6 23);
    border-bottom: 1px solid rgb(255 255 255 / 0.1);
    box-shadow: 0 18px 40px rgb(0 0 0 / 0.55);
  }

  /* top-level links and section buttons: full-width tap targets */
  .cl-nav-links > a,
  .cl-nav-links > .group > button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.8rem 1.25rem !important;
    text-align: left;
  }
  .cl-nav-links > a + a,
  .cl-nav-links > a + .group,
  .cl-nav-links > .group + a,
  .cl-nav-links > .group + .group {
    border-top: 1px solid rgb(255 255 255 / 0.06);
  }

  /* sub-menus: in-flow accordion instead of hover pop-out */
  .cl-nav-links > .group > div {
    position: static !important;
    display: none;
    width: auto !important;
    margin: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: rgb(255 255 255 / 0.03) !important;
  }
  .cl-nav-links > .group.cl-sub-open > div { display: block; }
  .cl-nav-links > .group > div a {
    padding: 0.7rem 1.25rem 0.7rem 2.25rem !important;
    margin: 0 !important;
    border-top: 0 !important;
    font-size: 0.95rem;
  }
  /* chevron follows the accordion state, not hover (sticky on touch) */
  .cl-nav-links > .group > button svg {
    transform: none !important;
    transition: transform 0.2s;
  }
  .cl-nav-links > .group.cl-sub-open > button svg { transform: rotate(180deg) !important; }
  .cl-nav-links > .group.cl-sub-open > button { color: rgb(14 165 233); }
}

/* --------------------------------------------------------------------
 * Phones (below Tailwind's md breakpoint)
 * ------------------------------------------------------------------ */
@media (max-width: 767.98px) {
  /* keep the logo from crowding the hamburger */
  nav a.text-2xl { font-size: 1.35rem; }

  /* long unbroken strings (docker image names, commands) wrap */
  main span, main code { overflow-wrap: anywhere; }
  main h1, main h2, main h3 { overflow-wrap: break-word; }
  main span.font-mono, main [class*="bg-fuchsia-950"] { max-width: 100%; }

  /* page-number buttons wrap instead of running off-screen */
  #pagination-controls {
    flex-wrap: wrap;
    row-gap: 0.5rem;
  }

  /* challenge list pages: compact left-aligned cards */
  #challenges-grid {
    place-items: stretch !important;
    gap: 0.75rem !important;
  }
  .challenge-card:not(.hidden) {
    display: grid !important;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.85rem;
    align-items: start;
    width: 100%;
    padding: 0.9rem 1rem !important;
    text-align: left;
  }
  /* icon + flag tag wrapper: let its children sit in the card grid */
  .challenge-card > div:nth-child(2) { display: contents; }
  .challenge-card > div:nth-child(2) > div {
    grid-column: 1;
    grid-row: 1 / span 3;
    padding: 0.4rem !important;
  }
  .challenge-card > h2 {
    grid-column: 2;
    grid-row: 1;
    margin: 0 !important;
    font-size: 1.05rem !important;
    line-height: 1.35;
    text-align: left !important;
  }
  .challenge-card > div:nth-child(2) > span {
    grid-column: 2;
    grid-row: 2;
    justify-self: start;
    margin-top: 0.3rem;
    padding: 0.1rem 0.4rem !important;
    font-size: 0.7rem !important;
  }
  .challenge-card > p {
    grid-column: 2;
    grid-row: 3;
    margin: 0.4rem 0 0 !important;
    text-align: left !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .challenge-card > div:last-child {
    grid-column: 1 / -1;
    grid-row: 4;
    flex-direction: row !important;
    flex-wrap: wrap;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 0.4rem 1rem !important;
    margin-top: 0.75rem;
    padding-top: 0.6rem !important;
  }
  .challenge-card > div:last-child > div {
    flex-wrap: wrap;
    gap: 0.25rem 1rem !important;
  }
}