body {
  font-family: Arial, sans-serif;
  background-color: #f0f4f8;
  margin: 0;
  padding: 30px;
  display: flex;
  justify-content: center;
}

.agenda-box {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 0 20px rgba(0,0,0,0.1);
  max-width: 1200px;
  width: 100%;
}

h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
}

.main-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

#week-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  flex: 3;
}

.day-card {
  background: #fdfdfd;
  border-radius: 8px;
  padding: 15px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

.day-card h2 {
  text-align: center;
  font-size: 18px;
  margin-bottom: 10px;
}

form {
  display: flex;
  gap: 5px;
  margin-bottom: 10px;
}

form input {
  flex: 1;
  padding: 6px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

form button {
  padding: 6px 10px;
  background-color: #00aaff;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 4px;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px;
  border-bottom: 1px solid #ddd;
}

li.completed span {
  text-decoration: line-through;
  color: gray;
}

li button {
  margin-left: 5px;
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

/* Notlar bölümü */
.notes-section {
  flex: 1;
  min-width: 250px;
  background-color: #fff8dc;
  padding: 15px;
  border-radius: 8px;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
}

.notes-section h2 {
  font-size: 18px;
  margin-bottom: 10px;
  text-align: center;
}

#notes-list li {
  padding: 6px;
  border-bottom: 1px solid #ccc;
  font-size: 14px;
}

#undo-note button {
  background-color: #ff7043;
  color: white;
  border: none;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
}