/* Northern Lights Theme */
:root {
  --background-gradient: linear-gradient(135deg, #0f2027, #203a43, #2c5364); /* Night sky gradient */
  --glow-color-1: #24c8db; /* Turquoise glow */
  --glow-color-2: #1dd1a1; /* Greenish glow */
  --glow-color-3: #3b82f6; /* Deep blue glow */
  --text-color: #f6f6f6; /* Light text for contrast */
  --tile-background: #1f1f1f; /* Dark tile background */
  --tile-border: #2c5364; /* Subtle border for tiles */
  --hover-glow: rgba(36, 200, 219, 0.3); /* Softer glow effect */
  --button-background: #1a2b3c; /* Darker button background for contrast */
  --input-background: #1a2b3c; /* Darker input background for contrast */
  font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 24px;
  font-weight: 400;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

/* Ensure the body and main elements fill the viewport */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh; /* Ensure the body fills the viewport height */
  margin: 0;
  background: var(--background-gradient);
  color: var(--text-color);
  font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
  padding: 0;
  overflow: hidden; /* Prevent scrollbars during animation */
}

main {
  flex: 1; /* Allow the main content to expand and push the footer down */
  display: flex;
  flex-direction: column;
  min-height: 100%; /* Ensure the main container fills the body */
  box-sizing: border-box;
}

/* Remove any unintended footer-like effect */
main::after {
  content: "";
  display: block;
  height: 0; /* Remove any extra space below the main content */
  background: none; /* Ensure no background is applied */
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(36, 200, 219, 0.1), transparent 70%);
  animation: ripple 15s infinite alternate ease-in-out;
  z-index: -1; /* Place behind all content */
}

/* Ripple animation for the background */
@keyframes ripple {
  0% {
    transform: translate(-10%, -5%) scale(1);
    background: radial-gradient(circle at 50% 50%, rgba(36, 200, 219, 0.1), transparent 70%);
  }
  25% {
    transform: translate(5%, 0%) scale(1.1);
    background: radial-gradient(circle at 55% 45%, rgba(29, 209, 161, 0.1), transparent 70%);
  }
  50% {
    transform: translate(10%, 5%) scale(1.2);
    background: radial-gradient(circle at 60% 50%, rgba(59, 130, 246, 0.1), transparent 70%);
  }
  75% {
    transform: translate(5%, 0%) scale(1.1);
    background: radial-gradient(circle at 55% 55%, rgba(29, 209, 161, 0.1), transparent 70%);
  }
  100% {
    transform: translate(-10%, -5%) scale(1);
    background: radial-gradient(circle at 50% 50%, rgba(36, 200, 219, 0.1), transparent 70%);
  }
}

.container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Default grid behavior */
  gap: 1rem;
  padding: 1rem;
}

@media (max-width: 600px) {
  .container {
    grid-template-columns: 1fr; /* 1 column for very narrow windows */
  }
}

@media (min-width: 601px) and (max-width: 900px) {
  .container {
    grid-template-columns: repeat(2, 1fr); /* 2 columns for medium-width windows */
  }
}

@media (min-width: 901px) and (max-width: 1200px) {
  .container {
    grid-template-columns: repeat(3, 1fr); /* 3 columns for wider windows */
  }
}

@media (min-width: 1201px) {
  .container {
    grid-template-columns: repeat(4, 1fr); /* 4 columns for very wide windows */
  }
}

h1 {
  grid-column: 1 / -1;
  text-align: center;
  margin: 0.5rem 0;
}

/* Tile styling */
.tile {
  background: rgba(31, 31, 31, 0.8); /* Translucent background */
  border: 1px solid var(--tile-border);
  border-radius: 8px;
  padding: 0.8rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  backdrop-filter: blur(10px); /* Add a blur effect for a glassy look */
}

.tile:hover {
  box-shadow: 0 0 8px var(--hover-glow), 0 0 12px var(--glow-color-1); /* Slightly more subtle glow */
  transform: translateY(-3px); /* Slight lift on hover */
}

.tile h2 {
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.file-selection,
.question-types,
.settings,
.actions {
  min-height: 100px;
}

.file-selection button,
.settings input {
  width: 100%;
}

.file-selection p,
.settings label {
  margin: 0.5rem 0;
}

/* Status tile styling */
.status {
  grid-column: 1 / -1;
  min-height: 160px;
  background: rgba(31, 31, 31, 0.8); /* Translucent background */
  border: 1px solid var(--tile-border);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  backdrop-filter: blur(10px); /* Add a blur effect for a glassy look */
}

.status:hover {
  box-shadow: 0 0 10px var(--hover-glow), 0 0 15px var(--glow-color-1);
  transform: translateY(-3px);
}

/* Dynamically allow Status to span 2 columns when there are 3 columns in the grid */
@media (min-width: 901px) and (max-width: 1200px) {
  .status {
    grid-column: 2 / span 2; /* Status spans 2 columns on the second row */
  }
}

.status #warnings {
  margin-top: 1rem;
  max-height: 150px;
  overflow-y: auto;
  color: var(--text-color);
}

#question-types {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

label {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.5rem;
}

label.memory-verse {
  grid-column: 1 / span 2;
  white-space: nowrap;
  align-items: center;
  gap: 0.5rem;
}

.toggle {
  position: relative;
  width: 40px;
  height: 20px;
  background: #555;
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.toggle::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.3s ease;
}

input[type="checkbox"] {
  display: none;
}

input[type="checkbox"]:checked + .toggle {
  background: var(--glow-color-1);
  box-shadow: 0 0 8px var(--hover-glow); /* Reduced glow intensity */
}

input[type="checkbox"]:checked + .toggle::before {
  transform: translateX(20px);
}

button,
input {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-color);
  background-color: var(--button-background);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.5); /* Subtle shadow */
  margin: 0.5rem 0;
  width: 100%;
  box-sizing: border-box;
}

button:hover,
input:hover {
  box-shadow: 0 0 6px var(--hover-glow), 0 0 10px var(--glow-color-1); /* Restored stronger glow */
  transform: translateY(-2px); /* Slight lift on hover */
}

button:active {
  transform: translateY(0); /* Reset lift on click */
}

button:disabled {
  opacity: 0.5; /* Reduced opacity for disabled buttons */
  cursor: not-allowed; /* Show "not-allowed" cursor */
  box-shadow: none; /* Remove hover glow */
  transform: none; /* Disable lift effect */
}

input {
  background-color: var(--input-background);
  padding: 0.5rem;
}

/* Header styling */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(31, 31, 31, 0.8); /* Translucent background */
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--tile-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px); /* Add a blur effect for a glassy look */
}

.header-left h1 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-color);
}

.header-right a {
  margin-left: 1.5rem;
  font-size: 1rem;
  color: var(--glow-color-1);
  text-decoration: none;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.header-right a:hover {
  color: var(--glow-color-2);
  text-shadow: 0 0 5px var(--hover-glow);
}

/* Footer styling */
.footer {
  background: rgba(31, 31, 31, 0.8); /* Translucent background */
  color: var(--text-color);
  text-align: center;
  padding: 1rem;
  border-top: 1px solid var(--tile-border);
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px); /* Add a blur effect for a glassy look */
}

@media (prefers-color-scheme: dark) {
  :root {
    --background-gradient: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    --glow-color: #24c8db;
    --text-color: #f6f6f6;
    --tile-background: #1f1f1f;
    --tile-border: #2c5364;
    --hover-glow: rgba(36, 200, 219, 0.5);
  }
}

/* Hide header-right on small screens */
@media (max-width: 500px) {
  .header-right {
    display: none;
  }
}