:root {
  --bg-1: #f8f6ec;
  --bg-2: #e6f0d4;
  --surface: #fffef9;
  --text: #21201c;
  --muted: #666156;
  --accent: #136f63;
  --accent-2: #e07a1f;
  --danger: #b42318;
  --ok: #18794e;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 20%, var(--bg-2), var(--bg-1));
}

.app-shell {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 18px;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
  animation: fade-in 260ms ease;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.intro-card h1 {
  margin-top: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.83rem;
}

.intro-text {
  color: var(--muted);
}

.start-error {
  margin: 0 0 10px;
  color: var(--danger);
  font-weight: 700;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 14px 0 18px;
}

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

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid #d7d0bc;
  border-radius: 10px;
  padding: 10px 12px;
}

.btn {
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
}

.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid #87c8ff;
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-secondary {
  background: #dde8dd;
  color: #1d3a2e;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.quiz-header {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.label {
  color: var(--muted);
  margin-right: 4px;
}

.question-card h2 {
  margin-top: 6px;
}

.level-badge {
  display: inline-block;
  margin: 0;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.85rem;
  background: #f3f2e9;
  color: #575340;
}

.question-area {
  margin-top: 12px;
}

.choice-list {
  display: grid;
  gap: 10px;
}

.choice-item {
  padding: 12px;
  border: 1px solid #d7d0bc;
  border-radius: 10px;
  background: #fff;
}

.choice-item.selected {
  border-color: var(--accent);
  background: #ecfaf8;
}

.drag-grid {
  display: grid;
  gap: 10px;
}

.drag-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  border: 1px solid #d9d5c9;
  border-radius: 10px;
  padding: 10px;
}

.drop-zone {
  min-height: 44px;
  border: 2px dashed #bdbaa9;
  border-radius: 8px;
  padding: 8px;
  background: #f8f7f1;
}

.drop-zone.filled {
  border-style: solid;
  border-color: var(--accent);
  background: #ebf7f3;
}

.drag-bank {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.drag-item {
  background: #f3efe3;
  border: 1px solid #d4cdb5;
  border-radius: 8px;
  padding: 8px;
  cursor: grab;
}

.feedback {
  margin-top: 14px;
  border-radius: 10px;
  padding: 10px 12px;
  background: #f5f4ed;
  border: 1px solid #ddd8c5;
}

.feedback.ok {
  border-color: #9ed2b6;
  background: #eaf8ef;
}

.feedback.nope {
  border-color: #efb7b3;
  background: #fff1f0;
}

.feedback-title {
  margin: 0 0 6px;
  font-weight: 700;
}

.did-you-know {
  margin-top: 10px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #d6c88e;
  background: #fff8de;
}

.did-you-know-title {
  margin: 0 0 4px;
  font-weight: 700;
  color: #705400;
}

#didYouKnowText {
  margin: 0;
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 10px;
}

.actions.wrap {
  flex-wrap: wrap;
}

.hidden {
  display: none;
}

.leaderboard-list {
  padding-left: 20px;
}

.leaderboard-list li {
  margin: 8px 0;
}

.cert-status {
  font-weight: 700;
  color: var(--ok);
}

.cert-status.fail {
  color: var(--danger);
}

@media (min-width: 720px) {
  .drag-row {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .form-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 14px;
  }

  .form-grid label {
    grid-column: span 1;
  }
}

@media print {
  body {
    background: #fff;
  }

  .no-print {
    display: none;
  }

  .screen {
    display: none !important;
  }

  #screen-certificate {
    display: block !important;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}