body {
  font-family: Arial, sans-serif;
  background: #f0fdfa;
  margin: 0;
  padding: 0;
  color: #083344;
}
header {
  background: #134e4a;
  color: #fff;
  padding: 1rem;
}
header h1 {
  margin: 0;
  font-size: 1.5rem;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.controls input,
.controls select,
.controls button {
  padding: 0.5rem;
  border-radius: 6px;
  border: 1px solid #ccc;
}
.task-list {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}
.task {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  border-bottom: 1px solid #ddd;
}
.task:last-child {
  border-bottom: none;
}
.task .info {
  flex: 1;
  margin-left: 0.5rem;
}
.task .info .title {
  font-weight: bold;
  color: #065f46;
}
.task .info .meta {
  font-size: 0.8rem;
  color: #555;
}
.task button {
  margin-left: 0.25rem;
  background: #10b981;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}
.task button:hover {
  background: #059669;
}
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  justify-content: center;
  align-items: center;
}
.modal-content {
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
}
.notes-editor {
  min-height: 120px;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 0.5rem;
  margin-top: 0.5rem;
}
#calendar {
  margin-top: 1.5rem;
  background: #fff;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}
#calendar h2 {
  margin-top: 0;
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}
.day {
  background: #e0f2f1;
  border-radius: 6px;
  padding: 0.5rem;
  min-height: 60px;
  font-size: 0.8rem;
}
.day.due {
  background: #fde68a;
}
.day.completed {
  background: #bbf7d0;
}