* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC",
    "Hiragino Sans GB", sans-serif;
  background: #f4f6f8;
  color: #222;
  line-height: 1.6;
  touch-action: manipulation;
}

.site-header {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 8px;
}

.site-header h1 {
  margin: 0 0 4px;
  font-size: 28px;
  font-weight: 700;
}

.subtitle {
  margin: 0;
  color: #667;
}

.top-bar {
  margin-bottom: 10px;
}

.back-link {
  color: #2563eb;
  text-decoration: none;
  font-size: 14px;
}

.back-link:hover {
  text-decoration: underline;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px 20px 40px;
}


.portal {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding-top: 12px;
}

.portal > .panel {
  grid-column: 1 / -1;
}

/* 首页最新战绩面板：与上方游戏栏目保持间距 */
.feed-panel {
  margin-top: 28px;
}

.portal-block {
  background: #fff;
  border: 1px solid #e2e6ea;
  border-radius: 12px;
  padding: 20px;
}

.portal-block h2 {
  margin: 0 0 6px;
  font-size: 18px;
}

.portal-block .note {
  margin: 0 0 14px;
  font-size: 13px;
  color: #667;
}

.option-grid {
  display: grid;
  gap: 12px;
}

.option-card {
  display: block;
  border: 1px solid #dde3e8;
  border-radius: 10px;
  padding: 14px 16px;
  text-decoration: none;
  color: inherit;
  background: #fafbfc;
  transition: border-color 0.15s, background 0.15s;
}

.option-card strong {
  display: block;
  font-size: 17px;
  margin-bottom: 2px;
}

.option-card span {
  font-size: 13px;
  color: #667;
}

.option-card:hover {
  border-color: #2563eb;
  background: #f2f6ff;
}


.panel {
  background: #fff;
  border: 1px solid #e2e6ea;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.note {
  color: #667;
  font-size: 13px;
}


.difficulty-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.game-status {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  font-size: 15px;
}

.game-status strong {
  color: #111;
}


.cards {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.card-tile {
  width: 72px;
  height: 96px;
  border: 2px solid #c9d2da;
  border-radius: 10px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 700;
  color: #111;
}

.card-tile.draggable {
  cursor: grab;
  font-family: inherit;
  touch-action: none;
}

.card-tile.used {
  opacity: 0.35;
  cursor: not-allowed;
}


.formula-panel {
  border: 1px dashed #c9d2da;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
  background: #fafbfc;
}

.formula-title {
  margin: 0 0 8px;
  font-size: 14px;
  color: #556;
}

.formula-strip {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  min-height: 48px;
  padding: 6px;
  border: 1px solid #e2e6ea;
  border-radius: 8px;
  background: #fff;
}

.strip-placeholder {
  color: #99a;
  font-size: 13px;
}

.f-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  cursor: grab;
  user-select: none;
}

.f-chip.num {
  background: #e7f0ff;
  color: #1d4ed8;
  border: 1px solid #bcd3f8;
}

.f-chip.sym {
  background: #f1f3f5;
  color: #333;
  border: 1px solid #d8dde3;
}

.f-chip:hover {
  border-color: #2563eb;
}

.formula-preview {
  margin: 8px 0 0;
  font-size: 15px;
  color: #333;
  min-height: 20px;
}


.challenge-name {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.challenge-name input {
  flex: 1;
  min-width: 200px;
  padding: 10px 12px;
  border: 1px solid #c9d2da;
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
}

.challenge-name input:focus {
  outline: 2px solid #93b4f5;
  border-color: #2563eb;
}

.end-info p {
  margin: 6px 0;
  font-size: 15px;
}

.end-info strong {
  font-size: 20px;
  color: #2563eb;
}

.lb-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.lb-cols h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

@media (max-width: 640px) {
  .lb-cols {
    grid-template-columns: 1fr;
  }
}

/* 2048 */
.g2048-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 4px;
}

.g2048-head h1 {
  margin: 0;
}

.g2048-logo {
  width: 56px;
  height: 56px;
  border-radius: 12px;
}

.g2048-board-wrap {
  position: relative;
  max-width: 440px;
  margin-bottom: 14px;
}

.board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: #bbada0;
  border-radius: 12px;
  padding: 10px;
  touch-action: none;
  user-select: none;
}

.cell {
  position: relative;
  aspect-ratio: 1;
  background: rgba(238, 228, 218, 0.35);
  border-radius: 8px;
}

.tile {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 700;
  font-size: 26px;
  color: #f9f6f2;
}

.tile-e1 { background: #eee4da; color: #776e65; }
.tile-e2 { background: #ede0c8; color: #776e65; }
.tile-e3 { background: #f2b179; }
.tile-e4 { background: #f59563; }
.tile-e5 { background: #f67c5f; }
.tile-e6 { background: #f65e3b; }
.tile-e7 { background: #edcf72; }
.tile-e8 { background: #edcc61; }
.tile-e9 { background: #edc850; }
.tile-e10 { background: #edc53f; }
.tile-e11 { background: #edc22e; }
.tile-huge {
  background: #3c3a32;
  color: #f9f6f2;
  font-size: 18px;
}

.g2048-overlay {
  position: absolute;
  inset: 0;
  background: rgba(238, 228, 218, 0.55);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.g2048-overlay.hidden {
  display: none;
}

.g2048-overlay-box {
  text-align: center;
  background: #fff;
  border-radius: 12px;
  padding: 24px 32px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.g2048-overlay-box h2 {
  margin: 0 0 6px;
}

.g2048-overlay-box p {
  margin: 0 0 14px;
  color: #667;
}

.g2048-pad {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.g2048-pad .pad-row {
  display: flex;
  gap: 8px;
}

.pad-btn {
  min-width: 56px;
  height: 48px;
  font-size: 18px;
}


.drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  min-width: 48px;
  height: 48px;
  border-radius: 10px;
  background: #2563eb;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.formula-strip.drop-active {
  border-color: #2563eb;
  background: #f2f6ff;
}

body.is-dragging {
  cursor: grabbing;
}


.drop-slot {
  display: inline-flex;
  flex: 0 0 auto;
  width: 26px;
  height: 36px;
  margin: 0 2px;
  border-radius: 8px;
  border: 2px dashed #2563eb;
  background: rgba(37, 99, 235, 0.1);
  pointer-events: none;
  vertical-align: middle;
}


.card-tile,
.token-btn,
.f-chip {
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}


.tokens {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.token-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 12px;
  border: 1px solid #c9d2da;
  border-radius: 8px;
  background: #fafbfc;
  font-size: 18px;
  cursor: pointer;
}

.token-btn:hover:not(:disabled) {
  border-color: #2563eb;
  background: #f2f6ff;
}

.token-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.token-btn,
.card-tile {
  user-select: none;
  -webkit-user-select: none;
}

.op-btn {
  cursor: grab;
  touch-action: none;
}

.f-chip {
  touch-action: none;
}

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

.btn {
  min-width: 88px;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid #c9d2da;
  background: #fff;
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary {
  background: #2563eb;
  border-color: #2563eb;
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.difficulty-btn.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #fff;
}


.message {
  min-height: 24px;
  margin-bottom: 10px;
  font-size: 15px;
}

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

.message.error {
  color: #b91c1c;
}

.message.info {
  color: #92600a;
}

.rules-box {
  margin-top: 10px;
  padding: 10px 14px;
  border: 1px dashed #c9d2da;
  border-radius: 10px;
  background: #fafbfc;
  font-size: 14px;
  color: #445;
}

.rules-box summary {
  cursor: pointer;
  color: #2563eb;
  font-weight: 600;
}

.rules-box ul {
  margin: 8px 0 0;
  padding-left: 20px;
  line-height: 1.7;
}

.rules-box ul ul {
  margin: 4px 0;
}

.rules-box h3 {
  margin: 12px 0 4px;
  font-size: 14px;
  color: #333;
}

.rules-box p {
  margin: 6px 0;
}

.hint-box {
  border: 1px dashed #c9d2da;
  border-radius: 8px;
  padding: 10px 12px;
  background: #fafbfc;
  font-size: 15px;
  word-break: break-all;
}

.hint-label {
  display: block;
  font-size: 13px;
  color: #667;
  margin-bottom: 8px;
}

.hidden {
  display: none;
}


.stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.stat {
  border: 1px solid #e2e6ea;
  border-radius: 10px;
  background: #fafbfc;
  padding: 10px 14px;
  min-width: 96px;
}

.stat.clickable {
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.stat.clickable:hover {
  border-color: #2563eb;
  background: #f2f6ff;
}

.stat.active {
  border-color: #2563eb;
  background: #f2f6ff;
}

.stat .num {
  display: block;
  font-size: 22px;
  font-weight: 700;
}

.stat .label {
  font-size: 12px;
  color: #667;
}


.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.filter-bar input,
.filter-bar select {
  padding: 8px 10px;
  border: 1px solid #c9d2da;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
}

.filter-bar input {
  flex: 1;
  min-width: 220px;
}

.filter-bar select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}


.s-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.lb-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.lb-tab {
  padding: 5px 16px;
  border-radius: 999px;
  border: 1px solid #c9d2da;
  background: #fff;
  color: #556;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}

.lb-tab.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #fff;
}

.lb-refresh {
  margin-left: auto;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid #c9d2da;
  background: #fff;
  color: #556;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}

.lb-refresh:hover {
  border-color: #2563eb;
  color: #2563eb;
}

.s-table th,
.s-table td {
  padding: 9px 12px;
  border-bottom: 1px solid #e8ebee;
  text-align: left;
}

.s-table th {
  background: #f7f8fa;
  font-weight: 600;
}

.s-row {
  cursor: pointer;
}

.s-row:hover td {
  background: #f6f9ff;
}

.s-table tr.mine td {
  background: #e7f0ff;
  font-weight: 600;
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.badge.ok {
  background: #e7f6ec;
  color: #15803d;
}

.badge.no {
  background: #fdeaea;
  color: #b91c1c;
}

.badge.diff {
  background: #eef1f6;
  color: #333;
}

.detail-row td {
  background: #fafbfc;
  word-break: break-all;
}

.detail-row.hidden {
  display: none;
}


.sol-formula {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 3px;
  align-items: center;
  vertical-align: middle;
}

.sol-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 5px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}

.sol-chip.num {
  background: #e7f0ff;
  color: #1d4ed8;
  border: 1px solid #bcd3f8;
}

.sol-chip.sym {
  background: #f1f3f5;
  color: #333;
  border: 1px solid #d8dde3;
}

.answer-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
}

.btn-mini {
  min-width: auto;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 6px;
}

.answer-none {
  color: #b91c1c;
  font-size: 13px;
}

.sol-list {
  display: flex;
  flex-direction: column;
}

.sol-note {
  font-size: 13px;
  color: #667;
  margin-bottom: 6px;
}

.sol-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  border-bottom: 1px dashed #eef1f4;
}

.sol-index {
  font-size: 12px;
  color: #99a;
  min-width: 34px;
}

.empty-tip {
  padding: 18px 0;
  color: #667;
  text-align: center;
}


.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-block;
  background: #eef1f6;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
}


.site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 30px;
  font-size: 12px;
  color: #889;
}


/* 2048 合并/得分动画 */
.tile-pop {
  animation: tile-pop 0.18s ease-out;
}
@keyframes tile-pop {
  0% { transform: scale(0.55); }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
.score-pop {
  animation: score-pop 0.28s ease-out;
}
@keyframes score-pop {
  0% { transform: scale(1.35); color: #2563eb; }
  100% { transform: scale(1); }
}

@media (max-width: 640px) {
  .portal {
    grid-template-columns: 1fr;
  }

  .cards {
    flex-wrap: wrap;
  }

  .card-tile {
    width: 60px;
    height: 80px;
    font-size: 24px;
  }

  .site-header h1 {
    font-size: 24px;
  }
}