.page-hero {
  position: relative;
  padding: clamp(6.6rem, 10vw, 8rem) 0 clamp(3.4rem, 5vw, 4.2rem);
}

.page-title {
  max-width: 920px;
  margin: 0;
  font-size: clamp(2.9rem, 6vw, 5.4rem);
  line-height: .98;
  letter-spacing: -0.075em;
  font-weight: 950;
  text-wrap: balance;
}

.page-description {
  max-width: 760px;
  margin: 1.15rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.85;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.45rem;
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  background: var(--surface-panel);
  box-shadow: var(--shadow-soft);
}

.timeline-dot {
  width: 13px;
  height: 13px;
  margin-top: .4rem;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 22px rgba(59,130,246,.85);
}

.study-card .study-progress-meta {
  margin: 0.4rem 0 0.9rem;
  color: var(--muted-strong);
  line-height: 1.6;
}

.study-card .study-progress {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.study-card .study-progress span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}

.study-card .study-checklist {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.study-card .study-checklist li {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted-strong);
  background: rgba(255, 255, 255, 0.03);
}

.study-card .study-checklist li::before {
  content: "[ ] ";
  color: var(--muted);
}

.study-card .study-checklist li.is-done {
  color: var(--text);
  border-color: rgba(59, 130, 246, 0.38);
  background: rgba(59, 130, 246, 0.12);
}

.study-card .study-checklist li.is-done::before {
  content: "[x] ";
  color: var(--cyan);
}

.study-notes {
  margin-top: 1.2rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.study-notes summary {
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted-strong);
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.study-notes summary::before {
  content: "▸ ";
  color: var(--cyan);
}

.study-notes[open] summary::before {
  content: "▾ ";
}

.study-notes p {
  margin: 0;
  padding: 0 0.85rem 0.85rem;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
}

/* Disciplina — grade e cards de tema */
.discipline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.discipline-tema-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.discipline-tema-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(34,211,238,.35);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
}

.discipline-status {
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
}

.discipline-status.done {
  color: #4ade80;
  background: rgba(74,222,128,.12);
  border: 1px solid rgba(74,222,128,.3);
}

.discipline-status.pending {
  color: var(--muted);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
}

.discipline-tema.is-done {
  border-color: rgba(59,130,246,.38);
}

/* Seção "Já estudei" — histórico de disciplinas */
.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 0.4rem;
}

.section-subtitle {
  color: var(--muted);
  margin: 0 0 2rem;
  font-size: 0.95rem;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.archive-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.archive-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #4ade80;
  background: rgba(74,222,128,.12);
  border: 1px solid rgba(74,222,128,.3);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
}

.archive-period {
  font-size: 0.78rem;
  color: var(--muted);
}

.archive-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.archive-empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1.2rem;
  border: 1px dashed var(--border);
  border-radius: 16px;
}

.archive-badge.pending-badge {
  color: var(--cyan);
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.3);
}