:root {
  --bg-dark: #1c1b2d;
  --bg-light: #f9f4ee;
  --accent: #ffb84c;
  --accent-strong: #ff6b6b;
  --accent-soft: #ffe8c7;
  --text-main: #1c1b2d;
  --text-on-dark: #f7f2ec;
  --card: #ffffff;
  --shadow: 0 20px 60px rgba(27, 24, 42, 0.18);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Verdana", sans-serif;
  background: radial-gradient(circle at top, #ffe7c2 0%, #f7c8a3 35%, #d9a2b7 60%, #1c1b2d 100%);
  color: var(--text-main);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

h1, h2, h3 {
  font-family: "Georgia", "Times New Roman", serif;
  margin: 0 0 12px;
}

p {
  margin: 0 0 12px;
  line-height: 1.5;
}

.screen {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.screen--center {
  min-height: 80vh;
  align-items: center;
  justify-content: center;
}

.screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-on-dark);
}

.screen-header h1 {
  color: var(--text-on-dark);
}

.card {
  background: var(--card);
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.btn {
  border: none;
  background: var(--accent-strong);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 10px 24px rgba(255, 107, 107, 0.35);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-on-dark);
  border: 2px solid rgba(255, 255, 255, 0.7);
  box-shadow: none;
}

.progress {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
}

.progress-label {
  font-weight: 600;
}

.progress-bar {
  position: relative;
  flex: 1;
  height: 10px;
  background: #eee;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar span {
  position: absolute;
  inset: 0;
  width: 0;
  background: linear-gradient(90deg, #ff6b6b, #ffb84c);
  border-radius: 999px;
}

.collection {
  display: grid;
  grid-template-columns: repeat(8, minmax(32px, 1fr));
  gap: 8px;
}

.collection-cell {
  background: rgba(255, 255, 255, 0.5);
  border-radius: 12px;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #7f7a6b;
  border: 1px dashed rgba(127, 122, 107, 0.4);
}

.collection-cell.unlocked {
  background: var(--accent-soft);
  color: var(--text-main);
  border: 1px solid rgba(255, 107, 107, 0.5);
  box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.15);
}

.game-placeholder {
  margin-top: 20px;
}

.reward {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
}

.reward img {
  width: min(260px, 80vw);
  border-radius: 18px;
  box-shadow: var(--shadow);
  background: #fff;
}

.reward .img-placeholder {
  width: min(260px, 80vw);
  height: 180px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.img-placeholder {
  background: repeating-linear-gradient(45deg, #f8dcc8, #f8dcc8 12px, #f2c0a7 12px, #f2c0a7 24px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 12px;
  color: #6f4a3a;
  text-align: center;
  padding: 8px;
}

.reward-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.puzzle {
  position: relative;
  background: rgba(255, 255, 255, 0.9);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.puzzle-header h2 {
  margin-bottom: 6px;
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(90px, 1fr));
  gap: 12px;
  background: #fff7ef;
  padding: 16px;
  border-radius: 20px;
  border: 2px dashed rgba(255, 184, 76, 0.4);
}

.slot {
  min-height: 90px;
  border: 2px dashed rgba(127, 122, 107, 0.4);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: rgba(127, 122, 107, 0.7);
  background: #fff;
  transition: transform 0.2s ease;
}

.slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.tray {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tray-row {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.tray-row::-webkit-scrollbar {
  height: 6px;
}

.tray-row::-webkit-scrollbar-thumb {
  background: rgba(255, 107, 107, 0.5);
  border-radius: 999px;
}

.piece {
  min-width: 110px;
  background: #fff;
  border-radius: 16px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  border: 2px solid transparent;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.piece img {
  width: 90px;
  height: 90px;
  object-fit: cover;
  border-radius: 12px;
}

.piece--selected {
  border-color: var(--accent-strong);
  transform: translateY(-2px) scale(1.02);
}

.tray-empty {
  padding: 16px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 16px;
}

.puzzle-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.after {
  padding: 18px;
  background: #fff7ef;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.after-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.after-ratio {
  font-weight: 700;
  color: var(--accent-strong);
}

.final-letter iframe {
  width: 100%;
  min-height: 220px;
  border: none;
  border-radius: 12px;
  background: #fff;
}

.final-letter img,
.final-letter .img-placeholder {
  width: 100%;
  max-height: 320px;
  min-height: 160px;
  object-fit: cover;
  border-radius: 12px;
  background: #fff;
}

.final-placeholder {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 184, 76, 0.2);
  font-size: 14px;
}

.toast {
  position: absolute;
  right: 20px;
  bottom: 20px;
  background: rgba(28, 27, 45, 0.9);
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast--visible {
  opacity: 1;
  transform: translateY(0);
}

.puzzle--solved .confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(255, 107, 107, 0.6) 0 6px, transparent 7px),
    radial-gradient(circle, rgba(255, 184, 76, 0.6) 0 6px, transparent 7px),
    radial-gradient(circle, rgba(255, 255, 255, 0.7) 0 6px, transparent 7px);
  background-size: 60px 60px;
  animation: confetti 1.4s ease-out;
}

@keyframes confetti {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 860px) {
  .screen-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .collection {
    grid-template-columns: repeat(4, minmax(36px, 1fr));
  }

  .board {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

@media (max-width: 520px) {
  .app {
    padding: 20px 16px 48px;
  }

  .btn {
    width: 100%;
  }

  .reward-actions,
  .puzzle-actions {
    width: 100%;
  }

  .board {
    grid-template-columns: repeat(2, minmax(100px, 1fr));
  }

  .slot {
    min-height: 100px;
  }
}

.piece .img-placeholder {
  width: 90px;
  height: 90px;
}

.slot .img-placeholder {
  width: 100%;
  height: 100%;
}