body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: linear-gradient(to bottom, #e8f4f8, #f7fbfc);
  color: #1c2b2e;
  display: flex;
  justify-content: center;
}

.app {
  max-width: 420px;
  padding: 20px;
}

h1 {
  text-align: center;
}

.lung-container {
  position: relative;
  height: 200px;
  margin: 30px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.face {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #ffd9c0;
  margin-bottom: 10px;
  transition: all 0.5s ease;
}

.lungs {
  width: 140px;
  height: 100px;
  border-radius: 70px 70px 50px 50px;
  background: #b3e5fc;
  transition: all 0.5s ease;
}

.aqi-box {
  text-align: center;
  margin-bottom: 20px;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

/* Smooth background transitions */
body {
  transition: background 0.8s ease;
}

/* Breathing animation */
@keyframes breathe {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.lungs {
  animation: breathe 4s ease-in-out infinite;
}

/* Mask overlay */
.mask {
  position: absolute;
  width: 60px;
  height: 35px;
  background: #ffffff;
  border-radius: 20px;
  top: 35px;
  left: 10px;
  display: none;
}

/* AQI label styling */
#aqi-label {
  font-weight: bold;
  margin-top: 5px;
}

/* NEW BOXES */

.activity-box,
.lung-load-box,
.lung-weather-box {
  background: rgba(255,255,255,0.6);
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.activity-box select {
  width: 100%;
  padding: 6px;
  margin-top: 8px;
}

.lung-load-box p:first-of-type {
  font-size: 24px;
  font-weight: bold;
}
.lung-weather {
  background: rgba(255,255,255,0.6);
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 20px;
  text-align: center;
  font-style: italic;
}
.calendar-container {
  margin-bottom: 20px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-top: 10px;
}

.day-cell {
  width: 100%;
  padding-top: 100%;
  position: relative;
  border-radius: 4px;
}

.day-cell span {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 10px;
}