/* ============================================================
   EduRobotics — Category page (editorial dosar)
   Layered on top of edurobotics-bootstrap.css. Uses its tokens:
   --er-paper, --er-ink, --er-line, --er-mute, --er-red,
   --er-font-display, --er-font-body, --er-font-mono.
   ============================================================ */

/* ------------------------------------------------------------
   Per-category accent. The page sets one of these classes on
   .dosar-scope and everything else consumes --dossier-accent.
   ------------------------------------------------------------ */
.dosar-scope                   { --dossier-accent: var(--er-ink); }
.dosar-scope.accent-fll-challenge  { --dossier-accent: var(--er-blue); }
.dosar-scope.accent-fll-explorer   { --dossier-accent: #0B8A3B; }
.dosar-scope.accent-ftc            { --dossier-accent: #B88500; }
.dosar-scope.accent-sumobot        { --dossier-accent: var(--er-red); }

/* ------------------------------------------------------------
   Page frame
   ------------------------------------------------------------ */
.dosar-scope {
  font-family: var(--er-font-body);
  color: var(--er-ink);
  max-width: 1320px;
  margin: 0 auto;
  padding: 16px 24px 96px;
}

/* ------------------------------------------------------------
   Breadcrumb override — editorial mono
   ------------------------------------------------------------ */
.dosar-scope .dosar-crumb {
  display: flex; gap: 10px; align-items: center;
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--er-mute);
  padding: 18px 0;
  border-bottom: 1px solid var(--er-line);
  margin-bottom: 32px;
}
.dosar-scope .dosar-crumb a { color: inherit; text-decoration: none; }
.dosar-scope .dosar-crumb a:hover { color: var(--er-ink); }
.dosar-scope .dosar-crumb .sep { opacity: 0.6; }
.dosar-scope .dosar-crumb .current { color: var(--er-ink); font-weight: 500; }

/* ------------------------------------------------------------
   Masthead — bracket code bar + giant title + stats row
   ------------------------------------------------------------ */
.dosar-masthead {
  padding: 0 0 48px;
  border-bottom: 1px solid var(--er-ink);
  margin-bottom: 56px;
}

.dosar-filebar {
  display: grid; grid-template-columns: 1fr auto auto auto 1fr;
  gap: 16px; align-items: center;
  padding: 10px 0;
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--er-mute);
  border-top: 1px solid var(--er-line);
  border-bottom: 1px solid var(--er-line);
  margin-bottom: 44px;
}
.dosar-filebar .sep {
  height: 12px; width: 1px; background: var(--er-line);
}
.dosar-filebar .tag {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--er-ink);
}
.dosar-filebar .tag::before {
  content: ''; width: 6px; height: 6px;
  background: var(--dossier-accent);
}
.dosar-filebar .right { text-align: right; }

.dosar-title {
  font-family: var(--er-font-display);
  font-size: clamp(56px, 9vw, 132px);
  line-height: 0.92; letter-spacing: -0.035em;
  font-weight: 500;
  margin: 0 0 32px;
  max-width: 14ch;
}
.dosar-title .accent {
  color: var(--dossier-accent);
  font-style: normal;
  position: relative;
}

.dosar-lede {
  max-width: 60ch;
  font-size: 17px; line-height: 1.55;
  color: var(--er-ink);
  margin: 0 0 40px;
}

/* Stats strip — inline microdata */
.dosar-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--er-line);
  border-bottom: 1px solid var(--er-line);
}
.dosar-stats .cell {
  padding: 20px 24px;
  border-right: 1px solid var(--er-line);
  display: flex; flex-direction: column; gap: 8px;
}
.dosar-stats .cell:last-child { border-right: 0; }
.dosar-stats .label {
  font-family: var(--er-font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--er-mute);
}
.dosar-stats .value {
  font-family: var(--er-font-display);
  font-size: 28px; line-height: 1; letter-spacing: -0.02em;
  color: var(--er-ink);
  font-weight: 500;
}
.dosar-stats .value .unit {
  font-family: var(--er-font-mono); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--er-mute);
  margin-left: 6px;
}

/* ------------------------------------------------------------
   Section headline — used between lead and feed
   ------------------------------------------------------------ */
.dosar-secrule {
  display: grid; grid-template-columns: auto 1fr auto; gap: 24px;
  align-items: center;
  margin: 72px 0 32px;
}
.dosar-secrule .num,
.dosar-secrule .note {
  font-family: var(--er-font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--er-mute);
}
.dosar-secrule .num { color: var(--er-ink); }
.dosar-secrule .line { height: 1px; background: var(--er-ink); }

/* ------------------------------------------------------------
   LEAD article — oversized editorial card
   ------------------------------------------------------------ */
.dosar-lead {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 48px;
  padding: 0 0 56px;
  border-bottom: 1px solid var(--er-line);
  margin-bottom: 8px;
}
.dosar-lead .art {
  position: relative; aspect-ratio: 4/3;
  background: var(--er-paper-2);
  overflow: hidden;
  border: 1px solid var(--er-line);
}
.dosar-lead .art img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.dosar-lead:hover .art img { transform: scale(1.03); }
.dosar-lead .art .badge-lead {
  position: absolute; top: 16px; left: 16px;
  padding: 6px 12px;
  background: var(--dossier-accent); color: #fff;
  font-family: var(--er-font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  font-weight: 600;
}
.dosar-lead .art.empty {
  display: grid; place-items: center;
  background-image:
    linear-gradient(var(--er-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--er-line) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--er-mute);
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
}

.dosar-lead .body { display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.dosar-lead .meta {
  display: flex; gap: 18px; align-items: center;
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--er-mute);
}
.dosar-lead .meta .tick { color: var(--dossier-accent); font-weight: 700; }
.dosar-lead .ttl {
  font-family: var(--er-font-display);
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.02; letter-spacing: -0.02em;
  font-weight: 500; color: var(--er-ink);
  margin: 0;
}
.dosar-lead .ttl a {
  color: inherit; text-decoration: none;
  background-image: linear-gradient(var(--er-ink), var(--er-ink));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size .3s;
}
.dosar-lead .ttl a:hover { background-size: 100% 1px; }
.dosar-lead .exc {
  font-size: 16px; line-height: 1.55; color: var(--er-ink);
  max-width: 52ch;
}
.dosar-lead .goto {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--er-ink);
  text-decoration: none;
  padding: 10px 0 10px;
  border-top: 1px solid var(--er-line);
  align-self: flex-start;
  margin-top: 12px;
}
.dosar-lead .goto .arr { transition: transform .2s; }
.dosar-lead .goto:hover .arr { transform: translateX(4px); }
.dosar-lead .goto:hover { color: var(--dossier-accent); }

/* ------------------------------------------------------------
   FEED — article grid
   ------------------------------------------------------------ */
.dosar-feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-left: 1px solid var(--er-line);
  border-top: 1px solid var(--er-line);
}
.dosar-feed .item {
  border-right: 1px solid var(--er-line);
  border-bottom: 1px solid var(--er-line);
  padding: 24px;
  background: var(--er-paper);
  position: relative;
  display: flex; flex-direction: column; gap: 14px;
  transition: background .2s;
}
.dosar-feed .item:hover { background: var(--er-paper-2); }
.dosar-feed .item .thumb {
  aspect-ratio: 16/10;
  background: var(--er-paper-2);
  border: 1px solid var(--er-line);
  overflow: hidden;
  position: relative;
}
.dosar-feed .item .thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.dosar-feed .item:hover .thumb img { transform: scale(1.04); }
.dosar-feed .item .thumb.empty {
  display: grid; place-items: center;
  background-image:
    linear-gradient(var(--er-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--er-line) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--er-mute);
  font-family: var(--er-font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
}
.dosar-feed .item .idx {
  position: absolute; top: 8px; right: 8px;
  padding: 4px 8px;
  background: color-mix(in srgb, var(--er-paper) 85%, transparent);
  backdrop-filter: blur(4px);
  font-family: var(--er-font-mono);
  font-size: 10px; letter-spacing: 0.1em;
  color: var(--er-ink);
  border: 1px solid var(--er-line);
}
.dosar-feed .item .meta {
  font-family: var(--er-font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--er-mute);
  display: flex; gap: 14px; align-items: center;
}
.dosar-feed .item .meta .new {
  color: var(--dossier-accent);
  display: inline-flex; align-items: center; gap: 6px;
}
.dosar-feed .item .meta .new::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--dossier-accent);
  animation: dosar-blink 1.4s infinite;
}
@keyframes dosar-blink { 50% { opacity: 0.3; } }

.dosar-feed .item .ttl {
  font-family: var(--er-font-display);
  font-size: 20px; line-height: 1.12;
  letter-spacing: -0.01em; font-weight: 500;
  color: var(--er-ink);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dosar-feed .item .ttl a {
  color: inherit; text-decoration: none;
}
.dosar-feed .item .ttl a::after {
  content: ''; position: absolute; inset: 0;
}
.dosar-feed .item .exc {
  font-size: 13px; line-height: 1.5;
  color: var(--er-mute);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: auto;
}

/* ------------------------------------------------------------
   Empty state
   ------------------------------------------------------------ */
.dosar-empty {
  padding: 72px 24px;
  text-align: center;
  border: 1px solid var(--er-line);
  background-image:
    linear-gradient(var(--er-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--er-line) 1px, transparent 1px);
  background-size: 40px 40px;
}
.dosar-empty .code {
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--er-mute);
  margin-bottom: 16px;
}
.dosar-empty .msg {
  font-family: var(--er-font-display);
  font-size: 28px; line-height: 1.1; color: var(--er-ink);
  font-weight: 500;
}

/* ------------------------------------------------------------
   Pagination — slab pager with rules
   ------------------------------------------------------------ */
.dosar-pager {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--er-line);
}
.dosar-pager .step {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  font-family: var(--er-font-mono);
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--er-ink);
  text-decoration: none;
  border: 1px solid var(--er-ink);
  background: var(--er-paper);
  transition: background .15s, color .15s;
}
.dosar-pager .step:hover { background: var(--er-ink); color: var(--er-paper); }
.dosar-pager .step.disabled {
  color: var(--er-mute); border-color: var(--er-line);
  pointer-events: none; background: transparent;
}
.dosar-pager .numbers {
  display: flex; gap: 4px; justify-content: center; flex-wrap: wrap;
  font-family: var(--er-font-mono);
  font-size: 12px; letter-spacing: 0.1em;
}
.dosar-pager .numbers a,
.dosar-pager .numbers span {
  padding: 8px 10px;
  min-width: 34px; text-align: center;
  color: var(--er-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.dosar-pager .numbers a:hover { color: var(--er-ink); border-bottom-color: var(--er-line); }
.dosar-pager .numbers .active {
  color: var(--er-ink); font-weight: 700;
  border-bottom-color: var(--dossier-accent);
}

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */
@media (max-width: 960px) {
  .dosar-stats { grid-template-columns: repeat(2, 1fr); }
  .dosar-stats .cell:nth-child(2) { border-right: 0; }
  .dosar-lead { grid-template-columns: 1fr; gap: 24px; }
  .dosar-feed { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .dosar-scope { padding: 8px 16px 72px; }
  .dosar-stats { grid-template-columns: 1fr; }
  .dosar-stats .cell { border-right: 0; border-bottom: 1px solid var(--er-line); }
  .dosar-stats .cell:last-child { border-bottom: 0; }
  .dosar-filebar { grid-template-columns: 1fr 1fr; gap: 8px 16px; }
  .dosar-filebar .sep { display: none; }
  .dosar-feed { grid-template-columns: 1fr; }
  .dosar-pager { grid-template-columns: 1fr; justify-items: center; gap: 14px; }
}