:root {
  --bg: #f5f5f5;
  --card: #ffffff;
  --muted: #9aa0a6;
  --border: #dee2e6;
  --accent: #bfc5c9;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: #222;
}

.app {
  max-width: 1100px;
  margin: 28px auto;
  padding: 20px;
}

.back-link {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 14px;
  color: #555;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  transition: all 0.2s;
}

.back-link:hover {
  color: #222;
  border-color: #999;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.subtitle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header h1 {
  margin: 0;
  font-weight: 600;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.column {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  min-height: 320px;
  display: flex;
  flex-direction: column;
}

.column h2 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--muted);
}

.list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  padding: 6px;
}

.card {
  background: linear-gradient(180deg, #fff, #fbfbfb);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 8px;
  cursor: grab;
  user-select: none;
  display: flex;
  align-items: center;
}

.card:active {
  cursor: grabbing;
}

.card .label {
  font-weight: 600;
  color: #444;
}

.card[data-type="verse"] {
  font-size: 14px;
}

.card.dragging {
  opacity: 0.5;
}

.card.wrong {
  animation: shake 0.35s;
}

@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-4px); }
  100% { transform: translateX(0); }
}

.matched-pair {
  display: flex;
  align-items: stretch;
  gap: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(20, 20, 20, 0.04);
  transform-origin: center;
  animation: pop 0.18s;
}

@keyframes pop {
  0% { transform: scale(0.96); }
  100% { transform: scale(1); }
}

.matched-pair .left {
  background: linear-gradient(90deg, var(--accent), #eef0f2);
  padding: 12px 14px;
  font-weight: 700;
  color: #2b2b2b;
  width: 36%;
}

.matched-pair .right {
  padding: 12px 14px;
  flex: 1;
  font-size: 14px;
  color: #333;
  background: linear-gradient(90deg, #fff, #fbfbfb);
}

.controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

button {
  background: #fff;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 8px;
  color: #333;
  cursor: pointer;
  transition: all 0.2s;
}

button:hover {
  border-color: #999;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

button:active {
  transform: scale(0.98);
}

.score {
  margin-top: 8px;
  color: var(--muted);
  font-weight: 600;
}

.correct-matches {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

.correct-matches h2 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--muted);
}

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

.tile {
  background: linear-gradient(135deg, #f0f8ff 0%, #e6f2ff 100%);
  border: 1px solid #d0e8ff;
  border-radius: 8px;
  padding: 12px;
  flex: 0 1 calc(50% - 5px);
  box-shadow: 0 2px 6px rgba(20, 20, 20, 0.04);
}

.correct-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  font-weight: 700;
  color: #28a745;
  pointer-events: none;
  z-index: 9999;
  animation: fadeInOut 2s ease-in-out forwards;
}

@keyframes fadeInOut {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
}

.wrong-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  font-weight: 700;
  color: #c63939;
  pointer-events: none;
  z-index: 9999;
  animation: fadeInOut 2s ease-in-out forwards;
}

.tile .tile-citation {
  font-weight: 700;
  color: #2b5a8a;
  margin-bottom: 6px;
  font-size: 13px;
}

.tile .tile-verse {
  color: #444;
  font-size: 13px;
  line-height: 1.4;
}

.typing-area{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.typing-area textarea{
  min-height:140px;
  padding:10px;
  border:1px solid var(--border);
  border-radius:8px;
  font-size:14px;
}
.typing-area .actions{display:flex;gap:8px}
.card.selected{outline:2px solid #c9d2d6}

@media (max-width: 820px) {
  .board {
    grid-template-columns: 1fr;
  }

  .matched-pair .left {
    display: none;
  }

  .tile {
    flex: 0 1 100%;
  }
}