:root {
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-border: #dde2e7;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-primary: #1d6f42;
  --color-primary-dark: #145530;
  --color-danger: #b3261e;
  --color-success: #1d6f42;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.page--wide {
  max-width: 960px;
}

header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  margin-bottom: 16px;
}

header.app-header h1 {
  font-size: 1.25rem;
  margin: 0;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

h2 {
  margin-top: 0;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 16px;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
}

textarea {
  min-height: 80px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  margin-bottom: 16px;
}

.checkbox-row input {
  margin: 0;
  width: auto;
}

button {
  appearance: none;
  border: none;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

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

button:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

button.secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

button.secondary:hover {
  background: rgba(29, 111, 66, 0.08);
}

.option-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0 24px;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.option-item:hover {
  border-color: var(--color-primary);
}

.option-item.selected {
  border-color: var(--color-primary);
  background: rgba(29, 111, 66, 0.08);
}

.option-item input {
  margin: 0;
  width: auto;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  transition: width 0.2s ease;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--color-text);
}

.timer.timer--warning {
  color: var(--color-danger);
}

.result-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.result-badge--pass {
  background: rgba(29, 111, 66, 0.12);
  color: var(--color-success);
}

.result-badge--fail {
  background: rgba(179, 38, 30, 0.12);
  color: var(--color-danger);
}

.score-value {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 8px 0;
}

.error-box {
  background: rgba(179, 38, 30, 0.08);
  border: 1px solid rgba(179, 38, 30, 0.3);
  color: var(--color-danger);
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.hint-text {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.loading {
  text-align: center;
  color: var(--color-muted);
  padding: 40px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  color: var(--color-muted);
  font-weight: 600;
}

.table-scroll {
  overflow-x: auto;
}

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.card-header-row h2 {
  margin: 0;
}

.results-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.results-toolbar input[type="search"] {
  margin-bottom: 0;
  min-width: 200px;
  width: auto;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--color-bg);
}

.results-toolbar input[type="search"]:focus {
  background: var(--color-surface);
}

.results-toolbar button {
  height: 40px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  white-space: nowrap;
}

.icon-btn .icon {
  font-size: 1rem;
  line-height: 1;
}

.icon-btn.is-loading .icon {
  display: inline-block;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge--pending { background: #eef1f4; color: var(--color-muted); }
.badge--in_progress { background: #fff4de; color: #9a6700; }
.badge--completed { background: rgba(29, 111, 66, 0.12); color: var(--color-success); }

.badge--pass { background: rgba(29, 111, 66, 0.12); color: var(--color-success); }
.badge--fail { background: rgba(179, 38, 30, 0.12); color: var(--color-danger); }

.link-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  flex-wrap: wrap;
}

.link-row input {
  flex: 1;
  min-width: 200px;
  margin-bottom: 0;
}

.form-grid {
  display: flex;
  flex-direction: column;
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 0;
}

.form-row label {
  flex: 0 0 auto;
  min-width: 180px;
  margin-bottom: 0;
}

.form-row input {
  width: 120px;
  flex: 0 0 auto;
  margin-bottom: 0;
}

@media (max-width: 480px) {
  .form-row {
    flex-wrap: wrap;
  }

  .form-row input {
    width: 100%;
    flex: 1 1 auto;
  }
}

.top-actions {
  display: flex;
  gap: 8px;
}

.text-center {
  text-align: center;
}

.small-print {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 24px;
  text-align: center;
}

.option-item--static {
  cursor: default;
}

.option-item--static:hover {
  border-color: var(--color-border);
}

.option-item--correct {
  border-color: var(--color-success);
  background: rgba(29, 111, 66, 0.08);
}

.option-item--incorrect {
  border-color: var(--color-danger);
  background: rgba(179, 38, 30, 0.08);
}

.option-item__tag {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
}

.option-item__tag--correct {
  color: var(--color-success);
}

.option-item__tag--selected {
  color: var(--color-danger);
}

.option-item--correct .option-item__tag--selected {
  color: var(--color-success);
}

dialog.answers-modal {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  width: 92vw;
  max-width: 680px;
  max-height: 85vh;
  box-shadow: var(--shadow);
  color: var(--color-text);
}

dialog.answers-modal::backdrop {
  background: rgba(15, 23, 42, 0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  max-height: calc(85vh - 73px);
}

.question-block {
  margin-bottom: 24px;
}

.question-block:last-child {
  margin-bottom: 0;
}

.question-block__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.question-block .option-list {
  margin: 8px 0 0;
}

.option-editor-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.option-editor-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.option-editor-row input[type="checkbox"],
.option-editor-row input[type="radio"] {
  width: auto;
  flex-shrink: 0;
}

.option-editor-row input[type="text"] {
  margin-bottom: 0;
  flex: 1;
}

.option-editor-row .option-editor-static {
  flex: 1;
  padding: 10px 12px;
  color: var(--color-text);
}

.option-editor-row .remove-option-btn {
  flex-shrink: 0;
  padding: 6px 10px;
  background: transparent;
  color: var(--color-danger);
  border: 1px solid var(--color-border);
}

.option-editor-row .remove-option-btn:hover {
  background: rgba(179, 38, 30, 0.08);
}

.badge--type {
  background: #eef1f4;
  color: var(--color-text);
}

.question-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.question-list #show-all-questions-btn {
  align-self: center;
  margin-top: 6px;
}

.question-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.question-card__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 12px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}

.question-card__summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.question-card__summary:hover {
  background: rgba(29, 111, 66, 0.06);
}

.question-card__text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.question-card--expanded .question-card__text {
  white-space: normal;
}

.question-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.question-card__chevron {
  color: var(--color-muted);
  transition: transform 0.15s ease;
}

.question-card--expanded .question-card__chevron {
  transform: rotate(180deg);
}

.question-card__details {
  padding: 4px 14px 16px;
  border-top: 1px solid var(--color-border);
}

.question-card__details .option-list {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.question-card__details .option-item {
  flex: 1 1 auto;
  min-width: 160px;
  padding: 8px 12px;
  cursor: default;
}

.question-card__details .option-item:hover {
  border-color: var(--color-border);
}

.question-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
}

.question-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.question-toggle__track {
  position: relative;
  width: 34px;
  height: 18px;
  flex-shrink: 0;
  border-radius: 999px;
  background: #d1d5db;
  transition: background 0.15s ease;
}

.question-toggle__track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.15s ease;
}

.question-toggle input:checked + .question-toggle__track {
  background: var(--color-success);
}

.question-toggle input:checked + .question-toggle__track::after {
  transform: translateX(16px);
}

.question-toggle input:focus-visible + .question-toggle__track {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .page {
    padding: 16px 12px 48px;
  }

  .card {
    padding: 18px;
  }

  th, td {
    font-size: 0.82rem;
  }
}

@media (max-width: 640px) {
  .results-toolbar {
    width: 100%;
  }

  .results-toolbar input[type="search"] {
    flex: 1;
    min-width: 0;
  }

  table.results-table thead {
    display: none;
  }

  table.results-table, table.results-table tbody, table.results-table tr, table.results-table td {
    display: block;
    width: 100%;
  }

  table.results-table tr {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    padding: 8px 12px;
  }

  table.results-table td {
    border-bottom: none;
    padding: 6px 0;
    white-space: normal;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    text-align: right;
  }

  table.results-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--color-muted);
    font-size: 0.78rem;
    text-align: left;
  }
}