body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: white;
  color: #111;
}

.calendar-container {
  max-width: 800px;
  margin: 3rem auto;
  padding: 2rem;
  border-radius: 16px;
}

h1 {
  text-align: center;
  font-weight: 300;
  font-size: 2rem;
  letter-spacing: 1px;
  margin-bottom: 2rem;
}

#calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1rem;
}

.day {
  aspect-ratio: 1;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 0.75rem;
  text-align: right;
  font-weight: 200;
  cursor: pointer;
  position: relative;
  transition: box-shadow 0.3s;
}

.day:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 20px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

textarea {
  width: 100%;
  height: 100px;
  font-size: 1rem;
  border: 1px solid #ddd;
  padding: 0.75rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}

button {
  padding: 0.5rem 1.5rem;
  background: black;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

.hidden {
  display: none;
}