/* =========================================================
   CAMPUS FORMULA — QUESTION IMPORT STUDIO
   Stylesheet
   ---------------------------------------------------------
   Design tokens are declared as CSS custom properties on
   :root so a future Dark Mode theme can override them by
   simply swapping the values on a `[data-theme="dark"]`
   selector. No dark mode is implemented yet — this is only
   the structural groundwork requested for a future phase.
========================================================= */

:root {
  /* Brand palette */
  --cf-primary: #fabf2c;
  --cf-primary-dark: #e0a913;
  --cf-secondary: #000000;
  --cf-bg: #f8f9fa;
  --cf-surface: #ffffff;
  --cf-border: #e5e7eb;
  --cf-text: #16181d;
  --cf-text-muted: #6b7280;

  /* Status palette */
  --cf-success: #1a9d5c;
  --cf-success-bg: #e8f8f0;
  --cf-warning: #e08a1e;
  --cf-warning-bg: #fef3e2;
  --cf-error: #d63438;
  --cf-error-bg: #fdeaea;

  /* Elevation */
  --cf-shadow-sm: 0 1px 2px rgba(16, 18, 21, 0.06);
  --cf-shadow-md: 0 6px 18px rgba(16, 18, 21, 0.08);
  --cf-shadow-lg: 0 16px 40px rgba(16, 18, 21, 0.12);

  /* Radius */
  --cf-radius-sm: 8px;
  --cf-radius-md: 14px;
  --cf-radius-lg: 20px;

  /* Header height */
  --cf-header-h: 68px;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  background: var(--cf-bg);
  color: var(--cf-text);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* =========================================================
   HEADER
========================================================= */
.cf-header {
  background: var(--cf-secondary);
  height: var(--cf-header-h);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: var(--cf-shadow-md);
}

.cf-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cf-header-left {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.cf-logo-mark {
  width: 38px;
  height: 38px;
  border-radius: var(--cf-radius-sm);
  background: var(--cf-primary);
  color: var(--cf-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.cf-logo-text {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.cf-header-center {
  align-items: center;
  flex: 1;
  justify-content: center;
}

.cf-header-title {
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  opacity: 0.85;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.cf-header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cf-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(250, 191, 44, 0.12);
  color: var(--cf-primary);
  border: 1px solid rgba(250, 191, 44, 0.35);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

/* =========================================================
   MAIN / PAGE HEADING
========================================================= */
.cf-main {
  flex: 1;
  padding: 2rem 0 3rem;
}

.cf-page-heading {
  margin-bottom: 1.25rem;
}

.cf-page-title {
  font-weight: 700;
  font-size: 1.4rem;
  margin-bottom: 0.15rem;
}

.cf-page-subtitle {
  color: var(--cf-text-muted);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* =========================================================
   CARDS
========================================================= */
.cf-card {
  background: var(--cf-surface);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-lg);
  box-shadow: var(--cf-shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.cf-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--cf-border);
  flex-wrap: wrap;
}

.cf-card-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  color: var(--cf-text);
}

.cf-card-title i {
  color: var(--cf-primary-dark);
}

.cf-card-body {
  padding: 1.5rem;
}

.cf-parser-tag {
  background: var(--cf-secondary);
  color: var(--cf-primary);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
}

/* =========================================================
   FORM CONTROLS
========================================================= */
.cf-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cf-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.cf-select,
.form-select.cf-select {
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.92rem;
  background-color: #fff;
}

.cf-select:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 0.2rem rgba(250, 191, 44, 0.25);
}

.cf-divider {
  border-top: 1px dashed var(--cf-border);
  margin: 1.5rem 0;
  opacity: 1;
}

.cf-textarea-wrap {
  margin-bottom: 1.5rem;
}

.cf-textarea {
  min-height: 500px;
  width: 100%;
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-md);
  padding: 1rem 1.1rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.86rem;
  line-height: 1.55;
  resize: vertical;
  background: #fcfcfd;
}

.cf-textarea:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 0.2rem rgba(250, 191, 44, 0.25);
  background: #ffffff;
}

.cf-counter-group {
  display: flex;
  gap: 1rem;
}

.cf-counter {
  font-size: 0.78rem;
  color: var(--cf-text-muted);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* =========================================================
   BUTTONS
========================================================= */
.cf-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.cf-btn {
  border-radius: var(--cf-radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.65rem 1.15rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  box-shadow: var(--cf-shadow-sm);
}

.cf-btn:disabled,
.cf-btn.disabled {
  opacity: 0.45;
  box-shadow: none;
  cursor: not-allowed;
}

.cf-btn-primary {
  background: var(--cf-secondary);
  color: var(--cf-primary);
  border-color: var(--cf-secondary);
}

.cf-btn-primary:hover:not(:disabled) {
  background: var(--cf-primary);
  color: var(--cf-secondary);
  border-color: var(--cf-primary);
  box-shadow: var(--cf-shadow-md);
}

.cf-btn-dark {
  background: var(--cf-secondary);
  color: #ffffff;
  border-color: var(--cf-secondary);
}

.cf-btn-dark:hover:not(:disabled) {
  background: var(--cf-primary);
  color: var(--cf-secondary);
  border-color: var(--cf-primary);
  box-shadow: var(--cf-shadow-md);
}

.cf-btn-outline {
  background: #ffffff;
  color: var(--cf-secondary);
  border-color: var(--cf-border);
}

.cf-btn-outline:hover:not(:disabled) {
  background: var(--cf-primary);
  color: var(--cf-secondary);
  border-color: var(--cf-primary);
}

.cf-btn-danger-outline {
  background: #ffffff;
  color: var(--cf-error);
  border-color: #f3c9ca;
}

.cf-btn-danger-outline:hover:not(:disabled) {
  background: var(--cf-error-bg);
  border-color: var(--cf-error);
}

.cf-btn .spinner-border {
  width: 0.9rem;
  height: 0.9rem;
}

/* =========================================================
   STATISTICS PANEL
========================================================= */
.cf-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.cf-stat-box {
  background: var(--cf-bg);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.cf-stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--cf-text);
}

.cf-stat-label {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--cf-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.cf-stat-warning .cf-stat-value {
  color: var(--cf-warning);
}

.cf-stat-error .cf-stat-value {
  color: var(--cf-error);
}

/* =========================================================
   REVIEW TOOLBAR — SEARCH + FILTERS
========================================================= */
.cf-review-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.cf-search-wrap {
  position: relative;
  flex: 1 1 260px;
  min-width: 220px;
}

.cf-search-wrap i {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--cf-text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.cf-search-input {
  padding-left: 2.25rem;
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  font-size: 0.88rem;
}

.cf-search-input:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 0.2rem rgba(250, 191, 44, 0.25);
}

.cf-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.cf-filter-btn {
  border: 1px solid var(--cf-border);
  background: #ffffff;
  color: var(--cf-text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  transition: all 0.15s ease;
}

.cf-filter-btn:hover {
  border-color: var(--cf-primary);
  color: var(--cf-text);
}

.cf-filter-btn.active {
  background: var(--cf-secondary);
  border-color: var(--cf-secondary);
  color: var(--cf-primary);
}

/* =========================================================
   EDIT MODAL — DYNAMIC OPTION / IMAGE ROWS
========================================================= */
.cf-textarea-sm {
  min-height: 90px;
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  padding: 0.65rem 0.85rem;
  font-size: 0.88rem;
  resize: vertical;
}

.cf-textarea-sm:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 0.2rem rgba(250, 191, 44, 0.25);
}

.cf-edit-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.cf-edit-row .form-control {
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  font-size: 0.85rem;
  padding: 0.5rem 0.7rem;
}

.cf-edit-row .form-control:focus {
  border-color: var(--cf-primary);
  box-shadow: 0 0 0 0.15rem rgba(250, 191, 44, 0.25);
}

.cf-edit-row-remove {
  border: 1px solid #f3c9ca;
  background: #ffffff;
  color: var(--cf-error);
  border-radius: var(--cf-radius-sm);
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cf-edit-row-remove:hover {
  background: var(--cf-error-bg);
}

/* =========================================================
   GENERATED JSON VIEWER
========================================================= */
.cf-json-meta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--cf-text-muted);
}

.cf-skipped-notice {
  background: var(--cf-warning-bg);
  border: 1px solid #f5dcb3;
  border-radius: var(--cf-radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: #8a5a12;
}

.cf-skipped-notice strong {
  color: #7a4d0f;
}

.cf-json-viewer {
  background: #14161a;
  border: 1px solid #2a2d33;
  border-radius: var(--cf-radius-md);
  padding: 1.1rem 1.25rem;
  max-height: 560px;
  overflow: auto;
  margin: 0;
}

.cf-json-code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  color: #e6e6e6;
  white-space: pre;
}

.cf-json-key { color: var(--cf-primary); }
.cf-json-string { color: #8bd49c; }
.cf-json-number { color: #79b8ff; }
.cf-json-boolean { color: #ff9d76; }
.cf-json-null { color: #b294f0; }

/* =========================================================
   HEADER ICON BUTTONS (Settings / Help)
========================================================= */
.cf-header-icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.cf-header-icon-btn:hover {
  background: var(--cf-primary);
  color: var(--cf-secondary);
  border-color: var(--cf-primary);
}

/* =========================================================
   COLLAPSIBLE CARD HEADERS (Developer Panel / Import History)
========================================================= */
.cf-collapsible-header {
  cursor: pointer;
  user-select: none;
}

.cf-collapse-chevron {
  transition: transform 0.2s ease;
  color: var(--cf-text-muted);
}

.cf-collapsible-header[aria-expanded="true"] .cf-collapse-chevron {
  transform: rotate(180deg);
}

/* =========================================================
   DEVELOPER PANEL
========================================================= */
.cf-dev-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.cf-dev-stat {
  background: var(--cf-bg);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  padding: 0.75rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.cf-dev-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cf-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.cf-dev-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cf-text);
}

.cf-dev-console {
  background: #14161a;
  border: 1px solid #2a2d33;
  border-radius: var(--cf-radius-sm);
  padding: 0.75rem 0.9rem;
  max-height: 240px;
  overflow-y: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.76rem;
  line-height: 1.6;
}

.cf-dev-log-line {
  white-space: pre-wrap;
  word-break: break-word;
  color: #cfd3da;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 0.15rem 0;
}

.cf-dev-log-line.level-warn { color: #ffcb7d; }
.cf-dev-log-line.level-error { color: #ff8f8f; }
.cf-dev-log-time { color: #6b7280; margin-right: 0.4rem; }

/* =========================================================
   IMPORT HISTORY TABLE
========================================================= */
.cf-history-table {
  font-size: 0.85rem;
  margin-bottom: 0;
}

.cf-history-table thead th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--cf-text-muted);
  border-bottom: 2px solid var(--cf-border);
  font-weight: 700;
}

.cf-history-table td {
  vertical-align: middle;
  border-color: var(--cf-border);
}

/* =========================================================
   HELP MODAL CONTENT
========================================================= */
.cf-help-body h6.cf-help-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.cf-help-body h6.cf-help-heading:first-child {
  margin-top: 0;
}

.cf-help-body p, .cf-help-body ol {
  font-size: 0.9rem;
  color: var(--cf-text);
}

.cf-help-example {
  background: var(--cf-bg);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-sm);
  padding: 0.75rem 1rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8rem;
  white-space: pre-wrap;
}

.cf-help-table {
  font-size: 0.85rem;
}

.cf-help-table td:first-child {
  white-space: nowrap;
  width: 1%;
}

/* =========================================================
   PREVIEW PANEL
========================================================= */
.cf-preview-count {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cf-text-muted);
}

.cf-empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  color: var(--cf-text-muted);
}

.cf-empty-state i {
  font-size: 2.4rem;
  color: var(--cf-border);
  display: block;
  margin-bottom: 0.75rem;
}

.cf-empty-state p {
  font-weight: 700;
  color: var(--cf-text);
  margin-bottom: 0.25rem;
  font-size: 0.98rem;
}

.cf-empty-state span {
  font-size: 0.85rem;
}

.cf-preview-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Individual question card (populated by renderPreview) */
.cf-question-card {
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-md);
  padding: 1.25rem;
  background: #fff;
}

.cf-question-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.cf-question-number {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--cf-text-muted);
}

.cf-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.cf-option-correct {
  background: var(--cf-success-bg);
  border: 1px solid #bfe8d3;
  border-radius: var(--cf-radius-sm);
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.35rem;
}

.cf-badge-success { background: var(--cf-success-bg); color: var(--cf-success); }
.cf-badge-warning { background: var(--cf-warning-bg); color: var(--cf-warning); }
.cf-badge-error   { background: var(--cf-error-bg);   color: var(--cf-error);   }

.cf-question-body {
  overflow: hidden;
  max-height: 4000px;
  transition: max-height 0.25s ease;
}

.cf-question-body.cf-collapsed {
  max-height: 0;
}

.cf-images-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.5rem;
  margin: 0.5rem 0;
}

.cf-images-grid img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  border-radius: var(--cf-radius-sm);
  border: 1px solid var(--cf-border);
}

.cf-warning-list {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.8rem;
  color: var(--cf-warning);
}

/* =========================================================
   SKELETON LOADER
========================================================= */
.cf-progress-wrap {
  margin-bottom: 1.25rem;
}

.cf-progress-text {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cf-text);
}

.cf-progress-percent {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cf-text-muted);
}

.cf-progress {
  height: 8px;
  border-radius: 999px;
  background-color: var(--cf-bg);
  border: 1px solid var(--cf-border);
  overflow: hidden;
}

.cf-progress-bar {
  background-color: var(--cf-primary);
  transition: width 0.15s ease;
}

.cf-skeleton-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cf-skeleton-card {
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius-md);
  padding: 1.25rem;
  background: #fff;
  animation: cf-fade 1.4s ease-in-out infinite;
}

.cf-skeleton-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, #eef0f2 25%, #f7f8f9 37%, #eef0f2 63%);
  background-size: 400% 100%;
  animation: cf-shimmer 1.4s ease infinite;
  margin-bottom: 0.6rem;
}

.cf-skeleton-line-lg { width: 85%; height: 16px; }
.cf-skeleton-line-md { width: 60%; }

.cf-skeleton-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.cf-skeleton-pill {
  height: 34px;
  border-radius: var(--cf-radius-sm);
  background: linear-gradient(90deg, #eef0f2 25%, #f7f8f9 37%, #eef0f2 63%);
  background-size: 400% 100%;
  animation: cf-shimmer 1.4s ease infinite;
}

@keyframes cf-shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: 0 0; }
}

@keyframes cf-fade {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

/* =========================================================
   MODAL
========================================================= */
.cf-modal {
  border-radius: var(--cf-radius-lg);
  border: none;
  box-shadow: var(--cf-shadow-lg);
}

/* =========================================================
   FOOTER
========================================================= */
.cf-footer {
  background: var(--cf-surface);
  border-top: 1px solid var(--cf-border);
  padding: 1.1rem 0;
  margin-top: auto;
}

.cf-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--cf-text-muted);
  font-weight: 600;
}

.cf-footer-version {
  background: var(--cf-bg);
  border: 1px solid var(--cf-border);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 991.98px) {
  .cf-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cf-dev-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767.98px) {
  .cf-card-body {
    padding: 1.1rem;
  }

  .cf-textarea {
    min-height: 340px;
  }

  .cf-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cf-actions .cf-btn {
    justify-content: center;
    width: 100%;
    margin-left: 0 !important;
  }

  .cf-header-title {
    display: none;
  }
}

@media (max-width: 575.98px) {
  .cf-stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cf-dev-grid {
    grid-template-columns: 1fr;
  }

  .cf-logo-text {
    display: none;
  }

  .cf-header-badge {
    display: none;
  }
}