:root {
  --ink: #16223b;
  --ink-soft: #3e4f75;
  --paper: rgba(255, 255, 255, 0.86);
  --surface: #ffffff;
  --line: #d4deff;
  --primary-a: #ff7f50;
  --primary-b: #ffb703;
  --secondary-a: #5ec2ff;
  --secondary-b: #85efc8;
  --success: #1f9d6a;
  --danger: #f0548a;
  --shadow: 0 18px 44px rgba(22, 34, 59, 0.16);
  --radius-xl: 28px;
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100svh;
  color: var(--ink);
  font-family: "Baloo 2", "Trebuchet MS", sans-serif;
  background: linear-gradient(145deg, #fff9ec 0%, #f2f8ff 48%, #e7fff5 100%);
  padding: 20px clamp(14px, 3vw, 28px);
}

.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(circle at 10% 22%, rgba(255, 183, 3, 0.24) 0 14%, transparent 15%),
    radial-gradient(circle at 92% 16%, rgba(255, 127, 80, 0.2) 0 16%, transparent 17%),
    radial-gradient(circle at 84% 82%, rgba(94, 194, 255, 0.22) 0 14%, transparent 15%),
    radial-gradient(circle at 16% 88%, rgba(133, 239, 200, 0.26) 0 16%, transparent 17%);
}

.app-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  background: var(--paper);
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  padding: clamp(16px, 3vw, 28px);
}

.app-header {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
  color: var(--danger);
}

h1,
h2 {
  margin: 0;
  font-family: "Bungee", "Baloo 2", cursive;
  letter-spacing: 0.02em;
  color: #102347;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-top: 4px;
}

h2 {
  font-size: clamp(1.2rem, 2.8vw, 1.8rem);
}

.lead {
  margin: 8px 0 0;
  max-width: 68ch;
  color: var(--ink-soft);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
}

.view {
  display: none;
  animation: slideUp 0.35s ease both;
}

.view.active {
  display: block;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.game-card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 0 10px 20px rgba(22, 34, 59, 0.08);
  display: grid;
  gap: 8px;
}

.game-card p {
  margin: 0;
  color: var(--ink-soft);
}

.game-icon {
  margin: 0;
  font-size: 2rem;
  line-height: 1;
}

.panel {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(14px, 2.5vw, 20px);
  box-shadow: 0 10px 20px rgba(22, 34, 59, 0.08);
}

.panel-head {
  margin-bottom: 12px;
}

.panel-head p {
  margin: 6px 0 0;
  color: var(--ink-soft);
}

.placeholder {
  margin-top: 10px;
  border: 2px dashed #b6c6ff;
  border-radius: var(--radius-md);
  padding: 14px;
  display: grid;
  gap: 10px;
  background: #f8fbff;
}

.placeholder p {
  margin: 0;
}

.back-btn,
.cta-btn,
.ghost-btn,
.link-btn {
  border: none;
  border-radius: 14px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  display: inline-block;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.back-btn {
  margin-bottom: 10px;
  background: #ffffff;
  border: 2px solid #e3e8ff;
  color: var(--ink);
  padding: 10px 16px;
}

.cta-btn {
  background: linear-gradient(135deg, var(--primary-a), var(--primary-b));
  color: #fff;
  padding: 11px 16px;
  box-shadow: 0 12px 22px rgba(255, 127, 80, 0.28);
}

.ghost-btn,
.link-btn {
  background: #ffffff;
  border: 2px solid #c8d6ff;
  color: var(--ink);
  padding: 11px 16px;
}

.back-btn:hover,
.cta-btn:hover,
.ghost-btn:hover,
.link-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.03);
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.control-block {
  display: grid;
  gap: 6px;
}

.control-block label {
  font-weight: 700;
  color: #1f3261;
}

.control-block input[type="file"],
.control-block select {
  width: 100%;
  border: 2px solid #cad7ff;
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 9px 10px;
}

.control-block.actions {
  align-content: end;
}

.control-block.actions .cta-btn,
.control-block.actions .ghost-btn {
  width: 100%;
}

.preset-section {
  margin-top: 16px;
}

.preset-title {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 700;
  color: #1f3261;
}

.preset-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 10px;
}

.preset-btn {
  border: 2px solid #cad7ff;
  border-radius: 12px;
  background: #fff;
  padding: 6px;
  cursor: pointer;
  display: grid;
  gap: 6px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.preset-btn img {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  object-fit: cover;
}

.preset-btn span {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.preset-btn.active {
  border-color: #ffad5a;
  box-shadow: 0 8px 20px rgba(255, 173, 90, 0.26);
  transform: translateY(-2px);
}

.hud {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

.chip {
  margin: 0;
  border-radius: 12px;
  border: 2px solid #d9e2ff;
  background: #f9fbff;
  padding: 9px 11px;
  font-weight: 700;
  color: #1f3261;
}

.sound-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sound-toggle input {
  inline-size: 18px;
  block-size: 18px;
}

.puzzle-board {
  --size: 3;
  margin-top: 16px;
  width: min(100%, 620px);
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  border: 3px solid #d7e4ff;
  background: linear-gradient(160deg, #f8fbff, #eff7ff);
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(var(--size), minmax(0, 1fr));
  gap: 7px;
}

.tile {
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 9px;
  background-color: #e6eefb;
  background-repeat: no-repeat;
  cursor: grab;
  transition: transform 0.16s ease, box-shadow 0.16s ease, outline-color 0.16s ease;
  min-height: 0;
  box-shadow: 0 5px 12px rgba(22, 34, 59, 0.15);
  position: relative;
}

.tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.44);
}

.tile:hover {
  transform: translateY(-1px);
}

.tile:active {
  cursor: grabbing;
}

.tile.selected {
  outline: 4px solid rgba(255, 127, 80, 0.6);
  outline-offset: -2px;
  transform: scale(0.98);
}

.tile.dragging {
  opacity: 0.6;
  transform: scale(0.98);
}

.tile.drop-target {
  outline: 3px dashed rgba(94, 194, 255, 0.8);
  outline-offset: -2px;
}

.puzzle-board.is-complete .tile {
  cursor: default;
}

.hint {
  margin: 10px 0 0;
  color: var(--ink-soft);
}

.win-banner {
  margin-top: 12px;
  border-radius: 14px;
  border: 2px solid #8ddfbb;
  background: linear-gradient(135deg, #e8fff4, #dffff1);
  color: var(--success);
  font-size: 1.12rem;
  font-weight: 800;
  padding: 12px 14px;
}

[hidden] {
  display: none !important;
}

@media (max-width: 720px) {
  body {
    padding: 12px;
  }

  .app-shell {
    border-radius: 20px;
  }

  .game-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}