/* ---------- Página de materia (hoja de plano) — usa la paleta de variables.css ---------- */

.home-display {
  font-family: "Space Grotesk", var(--font-body);
}

.home-mono {
  font-family: "IBM Plex Mono", var(--font-mono);
}

.reg-mark {
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}
.reg-mark::before,
.reg-mark::after {
  content: "";
  position: absolute;
  background: rgba(191, 220, 239, 0.35);
}
.reg-mark::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}
.reg-mark::after {
  left: 50%;
  top: 0;
  height: 100%;
  width: 1px;
  transform: translateX(-50%);
}
.reg-mark.tl {
  top: 14px;
  left: 14px;
}
.reg-mark.tr {
  top: 14px;
  right: 14px;
}

/* ---------- HERO (misma hoja de plano que el home, versión compacta) ---------- */
.course-sheet {
  --bg: var(--blueprint);
  --surface: var(--blueprint);
  --surface-2: var(--blueprint-deep);
  --text: var(--line);
  --text-muted: var(--line-muted);
  --border: var(--line-dim);

  position: relative;
  background: linear-gradient(rgba(191, 220, 239, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(191, 220, 239, 0.08) 1px, transparent 1px),
    linear-gradient(135deg, var(--surface), var(--bg));
  background-size: 32px 32px, 32px 32px, cover;
  color: var(--text);
  padding: 40px 24px 44px;
  overflow: hidden;
}
.course-sheet-inner {
  max-width: 1040px;
  margin: 0 auto;
  position: relative;
}

.course-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  font-size: 14px;
}
.course-nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--accent);
  flex-shrink: 0;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 22px;
}
.breadcrumb {
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  transition: color var(--transition);
}
.breadcrumb:hover {
  color: var(--accent);
}
.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition);
}
.share-btn:hover,
.share-btn.copied {
  color: var(--accent);
}
.breadcrumb svg {
  transform: rotate(180deg);
}

.course-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.course-eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent);
}
h1.course-title {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.08;
  margin: 0 0 14px;
  font-weight: 600;
  color: var(--text);
}
.course-sub {
  max-width: 56ch;
  font-size: 15.5px;
  color: var(--line-soft);
  line-height: 1.6;
  margin: 0 0 30px;
}

.title-block {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border);
  margin-top: 8px;
}
.title-block div {
  padding: 14px 18px;
  border-right: 1px solid var(--border);
}
.title-block div:last-child {
  border-right: none;
}
.tb-label {
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 5px;
}
.tb-value {
  font-size: 13px;
  color: var(--text);
}
@media (max-width: 720px) {
  .title-block {
    grid-template-columns: repeat(2, 1fr);
  }
  .title-block div:nth-child(2) {
    border-right: none;
  }
}

/* ---------- CONTENIDO ---------- */
.course-content {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 24px 90px;
}
.content-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}
.content-head h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin: 0;
  font-weight: 600;
}
.content-head span {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ---------- FILTRO DE PRESENTACIONES ---------- */
.course-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 20px;
  background: var(--surface-2);
  transition: border-color var(--transition);
}
.course-filter:focus-within {
  border-color: var(--accent);
}
.course-filter svg {
  flex-shrink: 0;
  color: var(--text-muted);
}
.course-filter-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
}
.course-filter-input::placeholder {
  color: var(--text-muted);
}
.course-filter-clear {
  flex-shrink: 0;
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}
.course-filter-clear.visible {
  display: inline-flex;
}
.course-filter-clear:hover {
  color: var(--accent);
}

.week.is-hidden,
.session.is-hidden {
  display: none !important;
}

.course-empty {
  color: var(--text-muted);
  font-size: 14.5px;
  padding: 32px 0;
  border: 1px dashed var(--border);
  text-align: center;
}

/* ---------- WEEK GROUPS ---------- */
.week {
  border: 1px solid var(--border);
  margin-bottom: 16px;
}
.week-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 20px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.week-head .num {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.week-head .label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.week-head .count {
  margin-left: auto;
  font-size: 11.5px;
  color: var(--text-muted);
}
.week.standalone .week-head {
  background: rgba(226, 166, 59, 0.12);
}
.week.standalone .num {
  color: var(--accent);
}

.session {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.session:last-child {
  border-bottom: none;
}
a.session:hover {
  background: var(--surface-2);
}
.session .idx {
  font-size: 12px;
  color: var(--text-muted);
  width: 22px;
  flex-shrink: 0;
}
.session .body {
  flex-grow: 1;
}
.session h4 {
  font-size: 15px;
  margin: 0 0 4px;
  font-weight: 600;
  color: var(--text);
}
.session p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}
.session .go svg {
  color: var(--text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
  flex-shrink: 0;
}
a.session:hover .go svg {
  transform: translateX(3px);
  color: var(--accent);
}

.session.disabled {
  opacity: 0.6;
}
.session.disabled h4 {
  color: var(--text-muted);
}
.session .soon-tag {
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  padding: 3px 8px;
  flex-shrink: 0;
}

.course-footer {
  --bg: var(--blueprint-deep);
  --text-muted: var(--line-muted);
  --border: var(--line-dim);

  background: var(--bg);
  color: var(--text-muted);
  padding: 30px 24px;
  font-size: 12.5px;
  display: flex;
  justify-content: center;
  gap: 12px;
  border-top: 1px solid var(--border);
  text-align: center;
}