:root,
::backdrop {
  --sans-font: -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir,
    "Nimbus Sans L", Roboto, "Noto Sans", "Segoe UI", Arial, Helvetica,
    "Helvetica Neue", sans-serif;
  --mono-font: Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
  --standard-border-radius: 5px;
  --bg: #fff;
  --accent-bg: #f5f7ff;
  --text: #212121;
  --text-light: #585858;
  --border: #898EA4;
  --accent: #0d47a1;
  --accent-hover: #1266e2;
  --accent-text: var(--bg);
  --code: #d81b60;
  --preformatted: #444;
  --marked: #ffdd33;
  --disabled: #efefef;
  --dark-green: #006400;
  --light-green: #32CD32;
}

body {
  font-family: var(--sans-font);
  margin: 20px;
  background-color: #f0fff0;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

header a {
  text-decoration: none;
  color: var(--dark-green);
  font-size: 2rem;
  transition: color 0.3s ease, transform 0.3s ease;
}

header a:hover {
  color: var(--light-green);
  transform: scale(1.1);
}

main {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  max-width: 100%;
  margin: 0 auto 20px auto;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--standard-border-radius);
  justify-content: center;
  background-color: var(--bg);
}

.form-group {
  display: flex;
  align-items: center;
  margin: 5px;
}

label {
  margin-right: 5px;
  font-weight: bold;
  display: block;
}

textarea,
select,
input,
button,
.button {
  font-size: inherit;
  font-family: inherit;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border-radius: var(--standard-border-radius);
  box-shadow: none;
  max-width: 100%;
  display: inline-block;
}

textarea,
select,
input {
  color: var(--text);
  background-color: var(--bg);
  border: 1px solid var(--border);
}

textarea:not([cols]) {
  width: 100%;
}

input[type="checkbox"],
input[type="radio"] {
  vertical-align: middle;
  position: relative;
  width: min-content;
}

input[type="checkbox"] + label,
input[type="radio"] + label {
  display: inline-block;
}

input[type="radio"] {
  border-radius: 100%;
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background-color: var(--accent);
}

input[type="checkbox"]:checked::after {
  content: " ";
  width: 0.18em;
  height: 0.32em;
  border-radius: 0;
  position: absolute;
  top: 0.05em;
  left: 0.17em;
  background-color: transparent;
  border-right: solid var(--bg) 0.08em;
  border-bottom: solid var(--bg) 0.08em;
  font-size: 1.8em;
  transform: rotate(45deg);
}

input[type="radio"]:checked::after {
  content: " ";
  width: 0.25em;
  height: 0.25em;
  border-radius: 100%;
  position: absolute;
  top: 0.125em;
  background-color: var(--bg);
  left: 0.125em;
  font-size: 32px;
}

@media only screen and (max-width: 720px) {
  textarea,
  select,
  input {
    width: 100%;
  }
}

input[type="color"] {
  height: 2.5rem;
  padding: 0.2rem;
}

input[type="file"] {
  border: 0;
}

button {
  background-color: var(--accent);
  color: var(--accent-text);
  padding: 10px;
  border: none;
  border-radius: var(--standard-border-radius);
  cursor: pointer;
}

button:hover {
  background-color: var(--accent-hover);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.results {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.result-item {
  background-color: var(--bg);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--standard-border-radius);
  text-align: center;
  font-weight: bold;
  color: green;
  transition: background-color 0.3s, color 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-item a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  height: 100%;
  width: 100%;
  color: inherit;
  text-decoration: none;
}

.result-item:hover {
  background-color: #4CAF50;
  color: var(--accent-text);
}

.faded-word {
  color: var(--text-light);
}

#instructions-container {
  width: 100%;
  text-align: center;
  margin: 20px 0;
}

#instructions {
  font-size: 1.5rem;
}

.grid-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  width: 100%;
}

.grid-buttons button {
  flex: 1;
  padding: 15px;
  font-size: 16px;
}

.grid-buttons button + button {
  margin-left: 10px;
}

#loadMore {
  background-color: var(--accent);
  color: var(--accent-text);
}

#loadMore:hover {
  background-color: var(--accent-hover);
}

#goBack {
  background-color: blue;
  color: var(--accent-text);
}

#goBack:hover {
  background-color: #003399;
}

footer {
  background-color: var(--bg);
  padding: 20px;
  margin-top: 20px;
  border: 1px solid var(--border);
  border-radius: var(--standard-border-radius);
  text-align: center;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  form {
    flex-direction: column;
    align-items: stretch;
  }

  .results {
    grid-template-columns: 1fr 1fr;
  }

  .grid-buttons {
    flex-direction: column;
  }

  .grid-buttons button + button {
    margin-left: 0;
    margin-top: 10px;
  }
}

/* Loading Spinner Styles */
.spinner {
  display: none;
  margin: 20px auto;
  border: 8px solid #f3f3f3;
  border-top: 8px solid var(--accent);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}