/* 数字闪记 Num Flash · 独立样式（选择器统一前缀 .g-numflash） */

.g-numflash {
  justify-content: flex-start;
  gap: 10px;
}

/* ---------------- 顶部 ---------------- */

.g-numflash .nf-head {
  align-items: center;
  min-height: 40px;
}
.g-numflash .nf-head .grow { width: 100%; }
.g-numflash .nf-head .seg { width: 100%; padding: 4px; }
.g-numflash .nf-head .seg-item { min-height: 36px; font-size: 12px; }
.g-numflash .btn:focus { outline: none; }
.g-numflash .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------------- 数据 ---------------- */

.g-numflash .stats { gap: 8px; }
.g-numflash .stat { padding: 6px 6px; }
.g-numflash .stat-v { font-size: 16px; }
.g-numflash .nf-lives { color: #ff7ab8; letter-spacing: 0.08em; }
.g-numflash .nf-lives.low { color: #ff5c6c; }

/* ---------------- 棋盘 ---------------- */

.g-numflash .nf-boardwrap {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.g-numflash .nf-board-outer {
  position: relative;
  width: min(100%, clamp(238px, calc(100dvh - 352px), 420px));
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(183, 140, 255, 0.1), transparent 58%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  border: 1px solid var(--line-2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 22px 54px -32px rgba(0, 0, 0, 0.95);
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

.g-numflash .nf-board {
  position: absolute;
  inset: 6px;
  display: grid;
  grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr));
  grid-template-rows: repeat(var(--n, 4), minmax(0, 1fr));
  gap: 6px;
  --nf-font: 34px;
  font-size: var(--nf-font);
}

.g-numflash .nf-board[data-size="5"] { --nf-font: 28px; }
.g-numflash .nf-board[data-size="6"] { --nf-font: 24px; }

.g-numflash .nf-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  font: inherit;
  cursor: default;
  touch-action: manipulation;
  transition: background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, transform 0.12s ease;
}

.g-numflash .nf-board[data-size="6"] .nf-cell { border-radius: 9px; }

/* 空白格子的轻纹理（不暴露位置） */
.g-numflash .nf-cell::after {
  content: "";
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
  pointer-events: none;
}

.g-numflash .nf-num {
  position: relative;
  z-index: 1;
  font-size: 1em;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.14s ease, transform 0.14s cubic-bezier(0.2, 1.3, 0.4, 1);
}

.g-numflash .nf-cell.show {
  background: rgba(183, 140, 255, 0.2);
  border-color: rgba(183, 140, 255, 0.5);
  box-shadow: 0 0 16px rgba(183, 140, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.g-numflash .nf-cell.show .nf-num { opacity: 1; transform: scale(1); color: #e8ddff; }

.g-numflash .nf-cell.ok {
  background: rgba(62, 207, 142, 0.18);
  border-color: rgba(126, 231, 135, 0.6);
  box-shadow: 0 0 14px rgba(62, 207, 142, 0.28);
}
.g-numflash .nf-cell.ok .nf-num { opacity: 1; transform: scale(1); color: #8ef5a7; }

.g-numflash .nf-cell.ok::after {
  content: "✓";
  position: absolute;
  top: 4px;
  right: 6px;
  width: auto;
  height: auto;
  background: none;
  border-radius: 0;
  font-size: calc(var(--nf-font) * 0.38);
  font-weight: 800;
  color: #7ee787;
  line-height: 1;
  pointer-events: none;
}

.g-numflash .nf-cell.wrong {
  background: rgba(255, 92, 108, 0.22);
  border-color: rgba(255, 92, 108, 0.7);
  box-shadow: 0 0 14px rgba(255, 92, 108, 0.35);
}
.g-numflash .nf-cell.wrong .nf-num { opacity: 1; transform: scale(1); color: #ff9aa4; }

.g-numflash .nf-cell:disabled { opacity: 0.85; }
.g-numflash .nf-board.flashing .nf-cell { transition: background 0.2s ease, box-shadow 0.2s ease; }

/* ---------------- 覆盖层 ---------------- */

.g-numflash .nf-cover {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: linear-gradient(180deg, #131a2a, #0b0f18);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, visibility 0.18s;
}

.g-numflash .nf-cover.show { opacity: 1; visibility: visible; }

.g-numflash .nf-cover-card {
  width: 100%;
  max-width: 264px;
  text-align: center;
}

.g-numflash .nf-cover-title {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.3;
}

.g-numflash .nf-cover-sub {
  margin-top: 6px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--dim);
}

.g-numflash .nf-cover-stats {
  display: flex;
  gap: 8px;
  margin: 13px 0 4px;
}

.g-numflash .nf-cstat {
  flex: 1;
  min-width: 0;
  padding: 7px 4px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

.g-numflash .nf-cstat span {
  display: block;
  font-size: 10px;
  color: var(--faint);
  margin-bottom: 2px;
}

.g-numflash .nf-cstat b {
  display: block;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.g-numflash .nf-cover .btn { min-height: 44px; margin-top: 12px; }
.g-numflash .nf-cover-extra {
  margin-top: 8px;
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--faint);
}

/* ---------------- 操作行 / 底部 ---------------- */

.g-numflash .nf-toolbar .btn { min-height: 42px; }

.g-numflash .nf-meta { padding: 8px 12px 9px; }
.g-numflash .nf-meta-head { align-items: baseline; gap: 8px; }
.g-numflash .nf-meta-head .hint:first-child { color: var(--dim); font-weight: 600; }
.g-numflash .nf-meta-head .hint:first-child.ok { color: var(--accent); }
.g-numflash .nf-meta-head .hint:last-child { flex: none; color: var(--dim); font-variant-numeric: tabular-nums; }
.g-numflash .nf-flash-bar { height: 4px; margin-top: 6px; }
.g-numflash .nf-flash-bar > i { width: 0%; }
.g-numflash .nf-tip {
  margin-top: 6px;
  font-size: 10.5px;
  line-height: 1.55;
  color: var(--faint);
}

/* ---------------- 窄屏 / 动效偏好 ---------------- */

@media (max-width: 359px) {
  .g-numflash .nf-head .seg-item { font-size: 11px; }
  .g-numflash .stat-v { font-size: 15.5px; }
  .g-numflash .nf-board { --nf-font: 30px; gap: 5px; }
  .g-numflash .nf-board[data-size="6"] { --nf-font: 21px; }
}

@media (prefers-reduced-motion: reduce) {
  .g-numflash .nf-num { transition: none; }
  .g-numflash .nf-cover { transition: none; }
}