/* quarto-exercises.css */

:root {
  --ex-accent: #1a73e8;
  --ex-accent-dark: #4285f4;
  --ex-correct: #137333;
  --ex-incorrect: #c5221f;
  --ex-incorrect-border: #ea4335;
  --ex-muted: #555;
  --ex-muted-dark: #aaa;
  --ex-border-color: #ccc;
  --ex-border-strong: #ced4da;
  --ex-bg: transparent;
  --ex-control-bg: #f8f9fa;
  --ex-control-hover-bg: #e9ecef;
  --ex-control-primary-bg: #e9ecef;
  --ex-control-primary-hover-bg: #dee2e6;
  --ex-border-radius: 4px;
  --ex-focus-ring: 0 0 0 2px rgba(26, 115, 232, 0.3);
  --ex-panel-border: #6c757d;
  --ex-panel-border-dark: #adb5bd;
  --ex-select-arrow: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 10 10'%3E%3Cpath fill='%23666' d='M1 3h8l-4 4z'/%3E%3C/svg%3E");
}

body.quarto-dark {
  --ex-accent: #8ab4f8;
  --ex-accent-dark: #aecbfa;
  --ex-correct: #81c995;
  --ex-incorrect: #f28b82;
  --ex-incorrect-border: #f28b82;
  --ex-muted: #aaa;
  --ex-muted-dark: #aaa;
  --ex-border-color: #555;
  --ex-border-strong: #666;
  --ex-bg: transparent;
  --ex-control-bg: #2d2e30;
  --ex-control-hover-bg: #3c4043;
  --ex-control-primary-bg: #3c4043;
  --ex-control-primary-hover-bg: #4f5357;
  --ex-focus-ring: 0 0 0 2px rgba(138, 180, 248, 0.4);
  --ex-panel-border: #9aa0a6;
  --ex-select-arrow: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 10 10'%3E%3Cpath fill='%23aaa' d='M1 3h8l-4 4z'/%3E%3C/svg%3E");
}

.quarto-exercise {
  margin: 1.25rem 0;
  font-family: inherit;
  color: inherit;
  box-sizing: border-box;
  background: var(--ex-bg);
  --ex-button-primary-bg: var(--bs-primary, var(--ex-accent));
  --ex-button-primary-color: var(--bs-white, #fff);
  --ex-button-secondary-bg: var(--bs-secondary-bg, var(--ex-control-bg));
  --ex-button-secondary-color: var(--bs-body-color, inherit);
  --ex-button-border: var(--bs-border-color, var(--ex-border-color));
  --ex-box-bg: var(--bs-body-bg, transparent);
  --ex-box-border: var(--bs-border-color, var(--ex-border-color));
  --ex-box-radius: var(--bs-border-radius, var(--ex-border-radius));
}

.quarto-exercise-boxed {
  padding: 1rem;
  border: 1px solid var(--ex-box-border);
  border-radius: var(--ex-box-radius);
  background: var(--ex-box-bg);
}

.quarto-exercise [hidden],
.quarto-exercise-blank-container [hidden],
.quarto-exercise-choose-container [hidden] {
  display: none !important;
}

/* Accessibility classes */
.quarto-exercise .visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Fieldset reset */
.quarto-exercise-fieldset {
  border: none;
  padding: 0;
  margin: 0.75rem 0;
}

/* Answer Choices - Clean, Minimal List styling */
.quarto-exercise-choices {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0 0 0 1.25rem; /* Indented choices like a list */
  margin: 0.5rem 0;
  list-style: none;
}

.quarto-exercise-choices-grid {
  display: grid;
  grid-template-columns: repeat(var(--ex-option-columns, 1), minmax(0, 1fr));
  gap: 0.5rem 0.75rem;
}

.check-batch.quarto-exercise-batch-grid {
  display: grid;
  grid-template-columns: repeat(var(--ex-batch-columns, 1), minmax(0, 1fr));
  gap: 1rem;
}

.check-batch.quarto-exercise-batch-grid > .quarto-exercise,
.check-batch.quarto-exercise-batch-grid > .quarto-exercise-actions {
  margin: 0;
}

.check-batch.quarto-exercise-batch-grid > .quarto-exercise-actions {
  grid-column: 1 / -1;
}

@media (max-width: 640px) {
  .quarto-exercise-choices-grid,
  .check-batch.quarto-exercise-batch-grid {
    grid-template-columns: 1fr !important;
  }
}

.quarto-exercise-answer {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.6rem;
  padding: 0.1rem 0;
  border: none;
  background: transparent;
  border-radius: var(--ex-border-radius);
  cursor: pointer;
}

.quarto-exercise-control {
  display: flex;
  align-items: flex-start; /* Align with first line of text */
  margin: 0;
  color: inherit;
  font-weight: inherit;
}

.quarto-exercise-input {
  -webkit-appearance: none;
  appearance: none;
  width: 1rem;
  height: 1rem;
  border: 1px solid var(--ex-border-strong);
  background-color: transparent;
  outline: none;
  transition: all 0.2s ease-in-out;
  display: inline-grid;
  place-content: center;
  margin: 0.25rem 0.25rem 0 0; /* Keep baseline-aligned */
  flex-shrink: 0;
  cursor: pointer;
  box-sizing: border-box;
}

.quarto-exercise-input[type="checkbox"] {
  border-radius: 3px;
}

.quarto-exercise-input[type="radio"] {
  border-radius: 50%;
}

.quarto-exercise-input:hover {
  border-color: var(--ex-accent);
  background-color: var(--ex-control-hover-bg);
}

.quarto-exercise-input:focus-visible {
  box-shadow: var(--ex-focus-ring);
}

.quarto-exercise-input:checked {
  background-color: var(--ex-accent);
  border-color: var(--ex-accent);
}

.quarto-exercise-input[type="checkbox"]:checked::before {
  content: "";
  width: 0.55rem;
  height: 0.3rem;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg) translate(0.05rem, -0.05rem);
  box-sizing: border-box;
}

.quarto-exercise-input[type="radio"]:checked::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: white;
  box-sizing: border-box;
}

/* Correct/Incorrect states for input controls */
.quarto-exercise-answer.is-correct .quarto-exercise-input {
  border-color: var(--ex-correct) !important;
}

.quarto-exercise-answer.is-correct .quarto-exercise-input:checked {
  background-color: var(--ex-correct) !important;
  border-color: var(--ex-correct) !important;
}

.quarto-exercise-answer.is-incorrect .quarto-exercise-input {
  border-color: var(--ex-incorrect) !important;
}

.quarto-exercise-answer.is-incorrect .quarto-exercise-input:checked {
  background-color: var(--ex-incorrect) !important;
  border-color: var(--ex-incorrect) !important;
}

.quarto-exercise-answer-label {
  font-weight: bold;
  margin-right: 0.4rem;
  margin-top: 0; /* Keep baseline-aligned */
  user-select: none;
  line-height: 1.4;
}

.quarto-exercise-answer-content {
  flex-grow: 1;
  line-height: 1.4;
}

.quarto-exercise-answer-content p {
  margin: 0 !important;
  padding: 0 !important;
  line-height: 1.4;
}

/* Choice States (No bulky background/border boxes) */
.quarto-exercise-answer.is-correct {
  color: var(--ex-correct) !important;
  font-weight: 500;
}

.quarto-exercise-answer.is-incorrect {
  color: var(--ex-incorrect) !important;
}

.quarto-exercise-answer.is-correct::before,
.quarto-exercise-answer.is-incorrect::before {
  grid-column: 1;
  font-weight: 700;
  line-height: 1.4;
}

.quarto-exercise-answer.is-correct::before {
  content: "✓";
  color: var(--ex-correct);
}

.quarto-exercise-answer.is-incorrect::before {
  content: "×";
  color: var(--ex-incorrect);
}

.quarto-exercise-answer:is(.is-correct, .is-incorrect):has(.quarto-exercise-input:focus-visible)::before {
  outline: 2px solid var(--ex-accent);
  outline-offset: 2px;
}

.quarto-exercise-sr-only,
.quarto-exercise-answer.is-correct .quarto-exercise-control,
.quarto-exercise-answer.is-incorrect .quarto-exercise-control {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Feedback Styling (Indented below the choice content, no margins, no padding) */
.quarto-exercise-feedback {
  font-size: 0.88em;
  margin-top: 0.2rem;
  margin-left: 0;
  grid-column: 2;
  line-height: 1.4;
  color: var(--ex-muted);
}

.quarto-exercise-answer.is-correct .quarto-exercise-feedback {
  color: var(--ex-correct);
}

.quarto-exercise-answer.is-incorrect .quarto-exercise-feedback {
  color: var(--ex-incorrect);
}

/* Action Buttons - Minimal controls */
.quarto-exercise-actions {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  --ex-button-primary-bg: var(--bs-primary, var(--ex-accent));
  --ex-button-primary-color: var(--bs-white, #fff);
  --ex-button-secondary-bg: var(--bs-secondary, #6c757d);
  --ex-button-secondary-color: #fff;
  --ex-button-border: var(--bs-border-color, var(--ex-border-color));
}

.quarto-exercise-check-btn,
.quarto-exercise-reset-btn,
.quarto-exercise-hint-btn,
.quarto-exercise-blank-check-btn {
  padding: 0.25rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--ex-border-color);
  background-color: var(--ex-control-bg);
  color: inherit;
  border-radius: var(--ex-border-radius);
  cursor: pointer;
  line-height: 1.2;
}

.quarto-exercise-check-btn:hover,
.quarto-exercise-reset-btn:hover,
.quarto-exercise-hint-btn:hover,
.quarto-exercise-blank-check-btn:hover {
  background-color: var(--ex-control-hover-bg);
}

.quarto-exercise-btn {
  border-color: var(--ex-button-border);
}

.quarto-exercise-btn-primary {
  background: var(--ex-button-primary-bg);
  border-color: var(--ex-button-primary-bg);
  color: var(--ex-button-primary-color);
}

.quarto-exercise-btn-primary:hover {
  background-color: var(--ex-button-primary-bg) !important;
  color: var(--ex-button-primary-color) !important;
  opacity: 0.85;
}

.quarto-exercise-btn-secondary,
.quarto-exercise-hint-btn.quarto-exercise-btn-secondary {
  background: var(--ex-button-secondary-bg);
  color: var(--ex-button-secondary-color);
}

.quarto-exercise-btn-secondary:hover,
.quarto-exercise-hint-btn.quarto-exercise-btn-secondary:hover {
  background-color: var(--ex-button-secondary-bg) !important;
  color: var(--ex-button-secondary-color) !important;
  opacity: 0.85;
}

body.quarto-dark .quarto-exercise-reset-btn,
body.quarto-dark .quarto-exercise-hint-btn {
  border-color: transparent !important;
}

.quarto-exercise-btn:focus-visible {
  outline: none;
  box-shadow: var(--ex-focus-ring);
}

/* Hint Panel - Blue left border highlight */
.quarto-exercise-hint {
  margin-top: 1rem;
  padding: 0.25rem 0 0.25rem 1rem;
  border-left: 2px solid var(--ex-accent);
  color: var(--ex-muted);
  font-size: 0.9em;
  line-height: 1.4;
}

body.quarto-dark .quarto-exercise-hint {
  color: var(--ex-muted-dark);
  border-left-color: var(--ex-accent-dark);
}

/* Explanation Panel - Clean left border highlight */
.quarto-exercise-explanation {
  margin-top: 1rem;
  padding: 0.25rem 0 0.25rem 1rem;
  border-left: 2px solid var(--ex-panel-border);
  color: var(--ex-muted);
  font-size: 0.9em;
  line-height: 1.4;
}

body.quarto-dark .quarto-exercise-explanation {
  color: var(--ex-muted-dark);
  border-left-color: var(--ex-panel-border-dark);
}

/* Fill-in-the-blank & Dropdown Styling (Seamless Inline integration) */
.quarto-exercise-blank-container,
.quarto-exercise-choose-container {
  display: inline-flex;
  align-items: baseline;
  vertical-align: baseline;
  position: relative;
  margin: 0;
}

.quarto-exercise-blank-input {
  display: inline-block;
  vertical-align: baseline;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  padding: 0;
  margin: 0;
  border: none;
  border-bottom: 1px solid var(--ex-muted); /* Clean underline style */
  border-radius: 0;
  background: transparent;
  color: inherit;
  width: 80px;
  min-width: 3.5rem;
  max-width: 25rem;
  box-sizing: border-box;
  outline: none;
}

.quarto-exercise-blank-input::placeholder {
  color: var(--ex-muted);
  opacity: 1;
}

.quarto-exercise-blank-input:focus {
  border-bottom-color: var(--ex-accent);
}

.quarto-exercise-blank-input.is-correct {
  border-bottom-color: var(--ex-correct) !important;
  color: var(--ex-correct) !important;
}

.quarto-exercise-choose-select.is-correct {
  border-color: var(--ex-correct) !important;
  color: var(--ex-correct) !important;
}

.quarto-exercise-blank-input.is-incorrect {
  border-bottom-color: var(--ex-incorrect-border) !important;
  color: var(--ex-incorrect) !important;
}

.quarto-exercise-choose-select.is-incorrect {
  border-color: var(--ex-incorrect-border) !important;
  color: var(--ex-incorrect) !important;
}

/* Correct Inline States (Renders like normal text, no boxes/borders/backgrounds) */
.quarto-exercise-blank-container.is-correct,
.quarto-exercise-choose-container.is-correct {
  display: inline !important;
  vertical-align: baseline !important;
  margin: 0 !important;
  padding: 0 !important;
}

.quarto-exercise-blank-container.is-correct .quarto-exercise-blank-input,
.quarto-exercise-choose-container.is-correct .quarto-exercise-choose-select,
.quarto-exercise-choose-container.is-correct .quarto-exercise-choose-check-btn,
.quarto-exercise-blank-container.is-correct .quarto-exercise-blank-check-btn {
  display: none !important;
}

.quarto-exercise-blank-correct-text,
.quarto-exercise-choose-correct-text {
  display: inline !important;
  color: var(--ex-correct) !important;
  font-weight: bold;
}

.quarto-exercise-blank-correct-text {
  min-width: 3.5rem;
}

/* Inline Feedback (Compact error logs in parentheses to preserve sentence structure) */
.quarto-exercise-blank-feedback,
.quarto-exercise-choose-feedback {
  display: inline-block;
  font-size: 0.8em;
  margin-left: 0.3rem;
  vertical-align: middle;
}

.quarto-exercise-blank-feedback:empty,
.quarto-exercise-choose-feedback:empty {
  display: none !important;
}

.quarto-exercise-blank-feedback.is-incorrect:not(:empty),
.quarto-exercise-choose-feedback.is-incorrect:not(:empty) {
  color: var(--ex-incorrect) !important;
}

.quarto-exercise-blank-feedback.is-correct:not(:empty),
.quarto-exercise-choose-feedback.is-correct:not(:empty) {
  color: var(--ex-correct) !important;
}

.quarto-exercise-blank-feedback.is-incorrect:not(:empty)::before,
.quarto-exercise-choose-feedback.is-incorrect:not(:empty)::before,
.quarto-exercise-blank-feedback.is-correct:not(:empty)::before,
.quarto-exercise-choose-feedback.is-correct:not(:empty)::before {
  content: "(";
}

.quarto-exercise-blank-feedback.is-incorrect:not(:empty)::after,
.quarto-exercise-choose-feedback.is-incorrect:not(:empty)::after,
.quarto-exercise-blank-feedback.is-correct:not(:empty)::after,
.quarto-exercise-choose-feedback.is-correct:not(:empty)::after {
  content: ")";
}

.quarto-exercise-choose-select {
  display: inline-block;
  vertical-align: baseline;
  padding: 0.15rem 1.25rem 0.15rem 0.5rem;
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: 1px solid var(--ex-border-strong);
  border-radius: var(--ex-border-radius);
  background-color: var(--bs-body-bg, var(--ex-control-bg));
  color: var(--bs-body-color, inherit);
  cursor: pointer;
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
  background-image: var(--ex-select-arrow);
  background-repeat: no-repeat;
  background-position: right 0.4rem center;
  outline: none;
}

.quarto-exercise-choose-select:focus {
  border-color: var(--ex-accent);
}

.quarto-exercise-choose-select option,
.quarto-exercise-code-choose option {
  background-color: var(--bs-body-bg, var(--ex-control-bg));
  color: var(--bs-body-color, inherit);
}

.quarto-exercise-choose-check-btn,
.quarto-exercise-blank-check-btn {
  display: inline-block;
  vertical-align: baseline;
  padding: 0.15rem 0.5rem;
  font-size: 0.8em;
  border: 1px solid var(--ex-border-color);
  background-color: var(--ex-control-bg);
  color: inherit;
  border-radius: var(--ex-border-radius);
  cursor: pointer;
  margin-left: 0.25rem;
  line-height: 1.2;
  height: 1.5rem;
  box-sizing: border-box;
}

.quarto-exercise-choose-check-btn:hover,
.quarto-exercise-blank-check-btn:hover {
  background-color: var(--ex-control-hover-bg);
}

/* Hide standalone button if nested in an exercise block */
.quarto-exercise .quarto-exercise-choose-check-btn,
.quarto-exercise .quarto-exercise-blank-check-btn {
  display: none !important;
}

.quarto-exercise-status {
  align-self: center;
  margin-left: 0.75rem;
  font-size: 0.9em;
  font-weight: bold;
}

.quarto-exercise-status.is-correct {
  color: var(--ex-correct);
}

.quarto-exercise-status.is-incorrect {
  color: var(--ex-incorrect);
}

/* ---- Code Cloze ---- */

.quarto-exercise-code-cloze-wrapper {
  margin: 1rem 0;
}

.quarto-exercise-code-cloze-container {
  display: block;
}

/* Inputs and selects that live inside highlighted code blocks */
.quarto-exercise-code-blank,
.quarto-exercise-code-choose {
  font-family: var(--bs-font-monospace, monospace);
  font-size: inherit;
  line-height: inherit;
  vertical-align: baseline;
  display: inline;
  padding: 0 0.15em;
  border-radius: 3px;
  border: 1px solid var(--ex-border-color);
  background: transparent;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.quarto-exercise-code-blank {
  /* Standard default size like regular blanks, with underline placeholder */
  width: 80px;
  min-width: 0;
  max-width: 20rem;
  border: none;
  border-bottom: 1px solid var(--ex-muted); /* Underline placeholder (____) */
  border-radius: 0;
  padding: 0;
  outline: none;
  background: transparent;
  transition: border-color 0.15s, width 0.15s;
}

.quarto-exercise-code-blank:focus {
  border-bottom-color: var(--ex-accent);
  box-shadow: none;
}

.quarto-exercise-code-choose {
  cursor: pointer;
  outline: none;
  background-color: var(--bs-body-bg, var(--ex-control-bg));
  color: var(--bs-body-color, inherit);
}

.quarto-exercise-code-choose:focus {
  border-color: var(--ex-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ex-accent) 25%, transparent);
}

.quarto-exercise-code-blank.is-correct,
.quarto-exercise-code-choose.is-correct {
  border-color: var(--ex-correct);
  color: var(--ex-correct);
}

.quarto-exercise-code-blank.is-incorrect,
.quarto-exercise-code-choose.is-incorrect {
  border-color: var(--ex-incorrect);
  color: var(--ex-incorrect);
}