:root {
  --ink: #111;
  --muted: #888;
  --line: #e8e8e8;
  --board: #f3f3f3;
  --lose: #d92d20;
  --slot: 64px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  color: var(--ink);
  background: #fff;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button {
  font: inherit;
  color: inherit;
}

.app {
  width: min(720px, 100%);
  padding: 28px 16px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.topbar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.title {
  margin: 0;
  font-size: 28px;
  letter-spacing: 6px;
  font-weight: 700;
}

.lead {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.left-badge {
  font-size: 13px;
  color: var(--muted);
}

.left-badge strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
}

.restart {
  padding: 7px 14px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
}

.restart:hover {
  opacity: 0.82;
}

.levels {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
}

.levels button {
  padding: 4px 0;
  border: none;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
}

.levels button.active {
  color: var(--ink);
  font-weight: 700;
}

.table {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: max-content;
  max-width: 100%;
}

.board-wrap {
  display: flex;
  justify-content: center;
}

.board {
  position: relative;
  background: var(--board);
  border: 1px solid var(--line);
  border-radius: 12px;
  transform-origin: top center;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.tile {
  --shade: #333;
  position: absolute;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  background: var(--face);
  box-shadow: 0 4px 0 var(--shade);
  cursor: pointer;
}

.tile::after {
  content: "";
  width: 34%;
  height: 34%;
  background: #fff;
  pointer-events: none;
}

.tile.p0::after { border-radius: 50%; }
.tile.p1::after { border-radius: 3px; }
.tile.p2::after {
  width: 50%;
  height: 10%;
  border-radius: 99px;
}
.tile.p3::after {
  width: 0;
  height: 0;
  background: none;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 16px solid #fff;
}
.tile.p4::after {
  width: 30%;
  height: 30%;
  transform: rotate(45deg);
}
.tile.p5::after {
  width: 12%;
  height: 46%;
  border-radius: 99px;
}
.tile.p6::after {
  width: 46%;
  height: 12%;
  border-radius: 99px;
}
.tile.p7::after {
  width: 24%;
  height: 24%;
  border-radius: 50%;
  box-shadow: 10px 0 0 #fff;
}

.tile.blocked {
  cursor: default;
  opacity: 0.38;
  box-shadow: 0 2px 0 var(--shade);
}

.tile:not(.blocked) {
  box-shadow:
    0 0 0 2px #fff,
    0 5px 0 var(--shade);
}

.tile:not(.blocked):hover {
  transform: translateY(-2px);
}

.tile.leaving {
  pointer-events: none;
  opacity: 0;
}

.c0 { --face: #e23d3d; --shade: #b42318; }
.c1 { --face: #f08c00; --shade: #c2410c; }
.c2 { --face: #eab308; --shade: #a16207; }
.c3 { --face: #22c55e; --shade: #15803d; }
.c4 { --face: #14b8a6; --shade: #0f766e; }
.c5 { --face: #3b82f6; --shade: #1d4ed8; }
.c6 { --face: #8b5cf6; --shade: #6d28d9; }
.c7 { --face: #ec4899; --shade: #be185d; }

.tray {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.tray-label {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--muted);
}

.slot {
  display: flex;
  gap: 8px;
}

.slot-cell {
  width: var(--slot);
  height: calc(var(--slot) + 6px);
  border-radius: 8px;
  background: var(--board);
  border: 1px dashed #d4d4d4;
}

.slot-cell .tile {
  position: relative;
  width: 100%;
  height: 100%;
  left: auto;
  top: auto;
  cursor: default;
  opacity: 1;
  box-shadow: 0 3px 0 var(--shade);
}

.slot-cell .tile:hover {
  transform: none;
}

.tools {
  display: flex;
  gap: 10px;
}

.tool {
  min-width: 96px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.tool em {
  font-style: normal;
  color: var(--muted);
}

.tool:hover:not(:disabled) {
  background: #fafafa;
}

.tool:disabled {
  opacity: 0.35;
  cursor: default;
}

.message {
  min-height: 22px;
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.message:empty {
  display: none;
}

.message.win {
  color: #15803d;
}

.message.lose {
  color: var(--lose);
}

@media (max-width: 520px) {
  .title {
    font-size: 24px;
    letter-spacing: 4px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  :root {
    --slot: 42px;
  }
}