.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.weekday-header,
.day {
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.weekday-header {
  text-align: center;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}

.day {
  min-height: 5rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  color: var(--text);
}

.day.empty {
  background: transparent;
  box-shadow: none;
  border: none;
}

.day-number {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.day.today {
  border: 2px solid var(--accent);
  background: rgba(0,0,0,0.12);
}

.day.other-month {
  opacity: 0.45;
}

.day-content {
  flex: 1;
}

.topic {
  display: block;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.4rem;
  background: var(--bg);
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: 0.85rem;
  border-radius: 4px;
  box-shadow: inset 0 -1px 0 rgba(255,255,255,0.02);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 720px) {
  .calendar-grid {
    gap: 0.5rem;
  }

  .weekday-header,
  .day {
    padding: 0.75rem;
  }
}