/* =========================
   BOARD / COURSE VIEW
========================= */

.board-meta,
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.board-meta {
  margin-top: 1rem;
}

.board-chip {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.board-column,
.board-card,
.course-overview,
.section-card {
  border: 1px solid var(--border);
  background: var(--surface);
}

.board-column {
  padding: 0.9rem;
  border-radius: 14px;
}

.board-title {
  margin: 0 0 0.8rem;
  color: var(--cyan);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.board-list,
.sections-list {
  display: grid;
  gap: 0.7rem;
}

.board-card {
  padding: 0.7rem;
  border-radius: 10px;
  background: var(--surface-strong);
}

.board-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.92rem;
}

.board-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.board-inline-btn,
.board-back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(15, 118, 110, 0.28);
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.board-inline-btn {
  margin-top: 0.65rem;
  padding: 0.42rem 0.75rem;
  font-size: 0.75rem;
}

.board-back-btn {
  padding: 0.55rem 1rem;
  font-size: 0.82rem;
}

.board-inline-btn:hover,
.board-back-btn:hover {
  border-color: rgba(249, 115, 22, 0.38);
  background: rgba(249, 115, 22, 0.12);
  color: #9a3412;
}

.board-links {
  margin-top: 1.5rem;
}

/* Filters */

.board-filters {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.board-search {
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.board-search:focus {
  border-color: var(--focus-border);
}

.board-search::placeholder {
  color: var(--muted);
}

.filter-pills {
  gap: 0.5rem;
}

.filter-pill {
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: 0.2s;
}

.filter-pill:hover {
  color: var(--text);
}

.filter-pill[data-filter="all"].is-active,
.filter-pill[data-filter="active"].is-active {
  background: rgba(249, 115, 22, 0.12);
  border-color: rgba(249, 115, 22, 0.3);
  color: #9a3412;
}

.filter-pill[data-filter="done"].is-active {
  background: rgba(15, 118, 110, 0.1);
  border-color: rgba(15, 118, 110, 0.24);
  color: var(--primary-dark);
}

.filter-pill[data-filter="pending"].is-active {
  background: var(--surface-strong);
  border-color: var(--border);
  color: var(--muted);
}

/* Overview */

.course-overview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.25rem 1.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
}

.course-overview-text,
.course-total-bar {
  flex: 1;
  min-width: 160px;
}

.course-overview-title {
  margin: 0 0 0.15rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.course-overview-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.course-total-bar-label {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.course-total-bar-track {
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--border);
}

.course-total-bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

/* Sections */

.sections-list {
  gap: 0.85rem;
}

.section-card {
  overflow: hidden;
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.section-card:hover {
  transform: translateY(-2px);
}

.section-card.is-active {
  border-color: rgba(249, 115, 22, 0.3);
  background: rgba(249, 115, 22, 0.08);
}

.study-start-card {
  min-height: 190px;
}

.study-start-card .section-header {
  align-items: flex-start;
}

.study-start-card .section-title {
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.study-start-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.85rem 0 0.35rem;
}

.study-start-tags span {
  display: inline-flex;
  width: fit-content;
  padding: 0.35rem 0.65rem;
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary-dark);
  font-size: 0.74rem;
  font-weight: 800;
}

.study-details {
  margin-top: 1rem;
  max-width: 720px;
}

.study-details summary {
  width: fit-content;
  cursor: pointer;
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.study-details dl {
  display: grid;
  gap: 0.7rem;
  margin: 0.85rem 0 0;
}

.study-details div {
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.58);
}

.study-details dt {
  margin-bottom: 0.25rem;
  color: var(--primary-dark);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.study-details dd {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.55;
}

.section-card.is-hidden,
.aula-item.is-hidden {
  display: none;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
}

.section-num {
  width: 6rem;
  flex-shrink: 0;
  color: var(--primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.section-info {
  flex: 1;
}

.section-title {
  margin: 0 0 0.1rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-meta {
  display: inline-flex;
  width: fit-content;
  margin: 0.25rem 0 0;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--muted-strong);
  font-size: 0.75rem;
  font-weight: 700;
}

.section-progress {
  height: 3px;
  overflow: hidden;
  background: var(--border);
}

.section-progress-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s ease;
}

.section-card[data-status="done"] .section-progress-fill {
  width: 100%;
  background: var(--primary);
}

.section-card[data-status="active"] .section-progress-fill {
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.section-card[data-status="pending"] .section-progress-fill {
  width: 0%;
  background: transparent;
}

/* Aulas */

.aula-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin: 0;
  padding: 0.25rem 1.25rem 1.25rem;
  list-style: none;
}

.aula-item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 0.55rem;
  border-radius: 8px;
  transition: background 0.15s;
}

.aula-item:hover {
  background: var(--surface-strong);
}

.aula-check {
  display: flex;
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border);
  border-radius: 50%;
  font-size: 0.6rem;
  transition: background 0.2s, border-color 0.2s;
}

.aula-check.done {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.aula-check.done::after {
  content: "✓";
}

.aula-check.active {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-color: var(--blue);
  color: #fff;
}

.aula-check.active::after {
  content: "▶";
  font-size: 0.48rem;
}

.aula-check.pending {
  background: transparent;
  border-color: var(--border);
}

.aula-name {
  color: var(--text);
  font-size: 0.875rem;
  line-height: 1.45;
}

.aula-item[data-status="done"] .aula-name {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-color: rgba(148, 163, 184, 0.35);
}

.aula-item[data-status="active"] .aula-name {
  color: var(--primary-dark);
  font-weight: 600;
}

/* Empty */

.board-empty {
  display: none;
  padding: 2rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}

.board-empty.is-visible {
  display: block;
}

@media (max-width: 640px) {
  .section-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
  }

  .section-num {
    width: auto;
  }
}