:root {
  --bg-color: #f4f4f4;  
  --card-bg: #e0e0e0;   
  --text-color: #333; 
  --accent: #666;   
  --border: 1px solid #999;  
  --border-radius: 5px;  
  --box-shadow: none;   
  --bg-brightness: 1;   
}


body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 2rem;
  font-size: 1.05rem;

}
/* Start of grid layout pattern from Grid by method Example */
.app-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr); 
  gap: 1.5rem;
  /* End of grid layout pattern from Grid by method Example */
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.calculator-box { grid-column: 1; grid-row: 1; }
.sleep-debt-meter { grid-column: 1; grid-row: 2; }
#resultBox { grid-column: 2 / 4; grid-row: 1; }
.productivity-input { grid-column: 2; grid-row: 2; }
.chronotype-result { grid-column: 3; grid-row: 2; }
.relaxation-panel { grid-column: 2; grid-row: 3; }
.site-description { grid-column: 3; grid-row: 3;}

.calculator-box,
.sleep-debt-meter,
.productivity-input,
.chronotype-result,
.relaxation-panel,
.site-description {
  padding:1.3rem;
  box-shadow: none;
  background: #e0e0e0;
  border: 1px solid #999;
  /* border-radius: 6px */
}


.site-description h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.site-description p {
  font-size: 1rem;
  color: var(--text-color);
  line-height: 1.5;
}

#bg-image {
  display: none; 
  background: none !important; 
}



.light-mode #bg-image {
  filter: 
    brightness(0.85)
    contrast(120%)
    grayscale(70%);
}

.light-mode {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-color: #1e293b;    
  --accent: #909090;       
  --border: 1px solid #e2e8f0;
  --bg-brightness: 0.9;      
}

.light-mode body {
  color: var(--text-color);
}

.light-mode .cycle-item {
  background: var(--card-bg);
  border-color: #cbd5e1;
}

#cycleResults {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.cycle-item {
  background: #808080;
  padding: 1rem;
  flex: 1;
  min-width: 120px;
}

.debt-bar {
  height: 15px;
  background: var(--accent);
  transition: width 0.5s ease;
  border-radius: 8px;
  margin: 0.7rem;
}

.light-mode {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-color: #1e293b;
  --border: 1px solid #e2e8f0;
}

input, select {
  background: #ddd !important;
  color: #222 !important;
  border: 1px solid #999;
}

h1, h2, h3 {
  color: #222;
  font-weight: normal; 
}




button, input {
  color: var(--text-color);
}

button {
  background: #bbb;  
  color: #222;      
  border: 2px solid #777;
  padding: 10px 15px;
  border-radius: 5px;
  transition: none; 
}

button:hover {
  background: #888; 
  color: white;
}


.light-mode button {
  border-color: rgba(0,0,0,0.1); 
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.breathing-animation {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--accent);
  margin: 1rem auto;
  animation: breathe 4s infinite;
}

@keyframes fadeInBackground {
  from {
    opacity: 0;
    transform: scale(1.1); 
  }
  to {
    opacity: 0.4;
    transform: scale(1);
  }
}

.light-mode #bg-image {
  filter: brightness(0.85) contrast(120%) grayscale(70%);
}

/* Start of breathing animation code from CSS Tricks */
@keyframes breathe {
  0%, 100% { transform: scale(0.9); }
  50% { transform: scale(1.1); }
}
/* End of breathing animation code from CSS Tricks */


@media (max-width: 820px) {
  .app-container {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }
}

@media (max-width: 1200px) {
  .app-container {
    grid-template-columns: repeat(2, 1fr);
  }
}