:root {
  --primary-bg: #fff0f5; 
  --card-bg: #ffffff;
  --text-main: #4a4a4a;
  --text-muted: #888888;
  --accent-color: #ffb6c1; 
  
  --btn-feeding: #ffe4b5; 
  --btn-diaper: #e0ffff; 
  --btn-sleep: #e6e6fa; 
  --btn-bath: #f0fff0; 
  
  --shadow: 0 4px 15px rgba(0,0,0,0.05);
  --border-radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-bg: #1a1a24;
    --card-bg: #2a2a36;
    --text-main: #f0f0f0;
    --text-muted: #a0a0a0;
    --accent-color: #ff8fa3;
    
    --btn-feeding: #5c4b31;
    --btn-diaper: #2a4c4c;
    --btn-sleep: #3d3b5c;
    --btn-bath: #2b4c2b;
    
    --shadow: 0 4px 15px rgba(0,0,0,0.2);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

.hidden { display: none !important; }

.app-container { max-width: 600px; margin: 0 auto; padding: 20px; }

.header { text-align: center; margin-bottom: 20px; padding-top: 10px; }
.header h1 { font-size: 2.5rem; font-weight: 600; margin-bottom: 5px; }
.header p { color: var(--text-muted); margin-bottom: 15px; }

.tabs {
  display: flex;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 5px;
  box-shadow: var(--shadow);
}
.tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px;
  border-radius: 15px;
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.tab-btn.active {
  background: var(--primary-bg);
  color: var(--text-main);
  box-shadow: var(--shadow);
}

h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.dashboard, .actions, .history { margin-bottom: 30px; }

.status-card {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  font-size: 1.1rem;
}

.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}
.action-btn {
  border: none;
  border-radius: var(--border-radius);
  padding: 20px 10px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
  transition: transform 0.1s ease;
  font-family: inherit;
}
.action-btn:active { transform: scale(0.95); }
.action-btn .icon { font-size: 2.5rem; }

.feeding-btn { background-color: var(--btn-feeding); }
.diaper-btn { background-color: var(--btn-diaper); }
.sleep-btn { background-color: var(--btn-sleep); }
.bath-btn { background-color: var(--btn-bath); }

.history-list {
  list-style: none;
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.history-item {
  padding: 15px 20px;
  border-bottom: 1px solid rgba(128, 128, 128, 0.1);
  display: flex;
  align-items: center;
  gap: 15px;
}
.history-item:last-child { border-bottom: none; }

.history-icon { font-size: 1.5rem; }
.history-content { flex-grow: 1; }
.history-type { font-weight: 600; display: block; }
.history-time { font-size: 0.9rem; color: var(--text-muted); display: block;}
.history-amount { font-size: 0.9rem; font-weight: 600; color: var(--accent-color); margin-left: 5px; }

.history-actions {
  display: flex;
  gap: 10px;
}
.icon-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.icon-btn:hover { opacity: 1; }

.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: var(--border-radius);
  max-width: 90%;
  width: 400px;
  box-shadow: var(--shadow);
  text-align: center;
}

.bottom-modal {
  align-self: flex-end;
  margin-bottom: 20px;
  border-radius: 30px;
  padding: 25px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}
.modal-header h2 { margin: 0; color: var(--text-main); text-transform: none; }
.close-btn { background: none; border: none; font-size: 2rem; color: var(--text-muted); cursor: pointer; line-height: 1; }

.number-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 15px;
}
.sleep-grid {
  grid-template-columns: repeat(3, 1fr);
}
.number-grid button {
  background: var(--primary-bg);
  border: 1px solid rgba(128,128,128,0.2);
  border-radius: 12px;
  padding: 15px 5px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: background 0.1s;
}
.number-grid button:active { background: var(--accent-color); color: #000; }

.primary-btn {
  background-color: var(--accent-color);
  color: #111;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  margin-bottom: 10px;
  font-size: 1rem;
}
.secondary-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  font-family: inherit;
  text-decoration: underline;
  font-size: 0.9rem;
}
.small-text { font-size: 0.8rem; margin-bottom: 5px; }

.chart-container {
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}