:root {
  --bg: #f5f1e8;
  --bg-deep: #e7dece;
  --panel: rgba(255, 252, 247, 0.9);
  --panel-strong: #fffdf8;
  --ink: #1f2430;
  --muted: #5a6474;
  --line: rgba(32, 38, 48, 0.14);
  --accent: #115e59;
  --accent-soft: rgba(17, 94, 89, 0.12);
  --good: #18794e;
  --good-soft: rgba(24, 121, 78, 0.18);
  --bad: #b42318;
  --bad-soft: rgba(180, 35, 24, 0.14);
  --shadow: 0 24px 60px rgba(32, 24, 12, 0.12);
  --radius: 24px;
  --radius-sm: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
  background:
    radial-gradient(circle at top left, rgba(17, 94, 89, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(193, 80, 46, 0.18), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

button,
input,
select,
label {
  font: inherit;
}

.page-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 16px 40px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: start;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.hero-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero h1,
.question-card h2,
.results-panel h2,
.setup-panel h2 {
  margin: 0;
  font-size: clamp(2rem, 3.2vw, 3rem);
  letter-spacing: -0.03em;
}

.admin-trigger {
  width: 12px;
  height: 12px;
  border: none;
  border-radius: 999px;
  background: transparent;
  padding: 0;
  cursor: pointer;
  opacity: 0.08;
}

.admin-trigger:hover,
.admin-trigger:focus-visible {
  opacity: 0.22;
  outline: none;
}

.hero-copy,
.question-text,
.review-card p,
.field span,
.lab-copy {
  color: var(--muted);
  line-height: 1.5;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  padding: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.setup-grid,
.setup-stats,
.result-summary,
.review-list,
.choices {
  display: grid;
  gap: 14px;
}

.top-tabs {
  margin-bottom: 18px;
}

.setup-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 20px 0;
}

.field {
  display: grid;
  gap: 8px;
}

.field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--ink);
}

.mode-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.mode-button {
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--ink);
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
}

.mode-button.active {
  background: linear-gradient(135deg, #115e59, #0f766e);
  color: #fff;
  border-color: transparent;
}

.stat-tile {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.stat-tile strong {
  display: block;
  font-size: 1.35rem;
}

.primary-button,
.ghost-button {
  border: none;
  border-radius: 999px;
  padding: 13px 22px;
  cursor: pointer;
}

.setup-panel .primary-button {
  display: block;
  margin: 10px 0 0 auto;
}

.primary-button {
  background: linear-gradient(135deg, #115e59, #0f766e);
  color: #fff;
}

.ghost-button {
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  border: 1px solid var(--line);
}

.active-flag {
  background: rgba(43, 108, 176, 0.14);
  border-color: rgba(43, 108, 176, 0.45);
  color: #1e4f8a;
}

.exam-topbar,
.actions,
.review-meta,
.question-tools {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.question-card {
  padding: 0;
  border: none;
  background: transparent;
}

.question-text {
  font-size: 1.24rem;
  color: var(--ink);
  margin-bottom: 18px;
}

.objective-image-wrap {
  margin: 18px 0;
}

.objective-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
}

.question-text p {
  margin: 0 0 14px;
}

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

.objective-code-block {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(31, 36, 48, 0.06);
  overflow-x: auto;
}

.objective-code-block code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95em;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
}

.choice {
  display: flex;
  gap: 12px;
  align-items: start;
  padding: 16px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  cursor: pointer;
  transform-origin: center;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.choice:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(17, 94, 89, 0.08);
}

.choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
  margin: 0;
  appearance: none;
  -webkit-appearance: none;
}

.choice-selected {
  border-color: rgba(43, 108, 176, 0.9);
  background: var(--panel-strong);
  box-shadow: 0 0 0 4px rgba(43, 108, 176, 0.32), 0 14px 30px rgba(43, 108, 176, 0.14);
  transform: scale(1.01);
}

.choice-selected .choice-label {
  background: rgba(43, 108, 176, 0.12);
  color: var(--ink);
  box-shadow: 0 0 0 2px rgba(43, 108, 176, 0.18);
}

.choice-jiggle {
  animation: choice-jiggle 260ms ease;
}

@keyframes choice-jiggle {
  0% { transform: scale(1); }
  25% { transform: scale(1.02) translateX(-2px); }
  50% { transform: scale(1.03) translateX(2px); }
  75% { transform: scale(1.01) translateX(-1px); }
  100% { transform: scale(1); }
}

.choice-label {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.choice-text {
  flex: 1;
}

.choice-correct {
  background: var(--good-soft);
  border-color: rgba(24, 121, 78, 0.45);
}

.choice-correct .choice-label {
  background: linear-gradient(135deg, #18794e, #159957);
  color: #fff;
}

.choice-wrong {
  background: var(--bad-soft);
  border-color: rgba(180, 35, 24, 0.35);
}

.choice-wrong .choice-label {
  background: linear-gradient(135deg, #b42318, #d92d20);
  color: #fff;
}

.question-tools {
  margin-top: 24px;
  justify-content: flex-end;
}

.actions {
  margin-top: 18px;
  justify-content: flex-end;
}

.result-summary {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 20px 0 26px;
}

.review-card {
  padding: 16px 18px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.review-card h4 {
  margin: 0;
  font-size: 1.05rem;
}

.review-card .answer-line {
  margin: 6px 0;
}

.badge {
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.84rem;
  background: var(--bad-soft);
  color: var(--bad);
}

.lab-card {
  display: grid;
  gap: 18px;
  padding: 18px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.lab-prompt {
  display: grid;
  gap: 10px;
}

.lab-heading {
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.lab-separator {
  color: var(--muted);
  line-height: 1;
}

.lab-copy {
  margin: 0;
}

.lab-answer-block {
  display: grid;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.lab-answer-title {
  margin: 0;
  font-size: 1.15rem;
}

.lab-image {
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
}

@media (max-width: 720px) {
  body {
    font-size: 17px;
  }

  .page-shell {
    padding: 16px 10px 24px;
  }

  .panel {
    padding: 16px;
    border-radius: 18px;
  }

  .hero,
  .review-meta,
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-title-row {
    gap: 8px;
  }

  .exam-topbar {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
  }

  .hero h1,
  .question-card h2,
  .results-panel h2,
  .setup-panel h2 {
    font-size: clamp(1.55rem, 7vw, 2rem);
  }

  .question-text {
    font-size: 1.02rem;
    line-height: 1.55;
  }

  .setup-grid,
  .result-summary {
    grid-template-columns: 1fr;
  }

  .mode-buttons {
    gap: 8px;
  }

  .top-tabs,
  #order-mode {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }

  #order-mode {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .mode-button,
  .primary-button,
  .ghost-button {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
  }

  .setup-panel .primary-button {
    width: 100%;
    margin: 10px 0 0;
  }

  .choices {
    gap: 10px;
  }

  .choice {
    gap: 10px;
    padding: 14px 12px;
    border-radius: 14px;
  }

  .choice-selected {
    transform: none;
  }

  .choice-label {
    width: 26px;
    height: 26px;
    flex-basis: 26px;
    font-size: 0.92rem;
  }

  .choice-text {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .lab-card,
  .review-card,
  .stat-tile {
    padding: 14px;
    border-radius: 14px;
  }

  .objective-image,
  .lab-image {
    border-radius: 12px;
  }

  .question-tools {
    margin-top: 18px;
  }

  .actions {
    margin-top: 20px;
    flex-direction: column-reverse;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .page-shell {
    padding-inline: 8px;
  }

  .panel {
    padding: 14px;
  }

  .question-counter,
  .question-id {
    font-size: 0.92rem;
  }

  .eyebrow {
    font-size: 0.72rem;
  }

  .lab-prompt,
  .review-list,
  .setup-stats,
  .choices {
    gap: 8px;
  }
}

@media (hover: none) and (pointer: coarse) {
  .choice:hover {
    transform: none;
    box-shadow: none;
  }
}