/* ===================== Variables (Flat / Material-ish) ===================== */
:root{
  /* colors */
  --ink:#1f2937; --muted:#6b7280; --bg:#fff; --bg-alt:#f6f7f9; --divider:#e5e7eb;
  --brand:#2563eb; --brand-ink:#0b4ad9; --success:#059669; --danger:#ef4444;

  /* status colors (kept for JS classes) */
  --ok:#14a44d; --bad:#dc3545; --pending:#9aa0a6;

  /* layout */
  --gap:12px; --radius:10px;
  --focus-ring:2px solid color-mix(in oklab, var(--brand) 80%, #fff);
}

*{ box-sizing:border-box; }
body{ color:var(--ink); background:var(--bg); }
.wrap{ max-width:960px; margin:2rem auto; padding:0 1rem 3rem; }
h1{ color:var(--ink); font-weight:700; letter-spacing:.1px; font-size:clamp(20px,2.2vw + 12px,36px); margin:0 0 1rem; }

/* ============================== Controls ============================== */
.controls{ display:flex; flex-wrap:wrap; gap:var(--gap); align-items:center; margin-bottom:1rem; }
.controls .group{
  display:flex; align-items:center; gap:.75rem;
  padding:6px 10px; background:var(--bg-alt); border:1px solid var(--divider); border-radius:var(--radius);
}
.controls label{ cursor:pointer; }

/* Select with flat arrow */
.controls select{
  appearance:none;
  background:#fff url("data:image/svg+xml;utf8,<svg fill='%236b7280' height='20' viewBox='0 0 24 24' width='20' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>") no-repeat right 10px center;
  background-size:16px;
  color:var(--ink);
  border:1px solid var(--divider); border-radius:8px;
  padding:.45rem 2rem .45rem .7rem; min-width:130px;
}

.controls button{
  appearance:none; border:1px solid var(--divider); background:#fff; color:var(--ink);
  padding:.5rem .9rem; border-radius:8px; font-weight:600; cursor:pointer;
  transition:background-color .15s ease, border-color .15s ease, color .15s ease;
}
.controls button.primary{ border-color:var(--brand); background:var(--brand); color:#fff; }
.controls button:disabled{ opacity:.5; cursor:not-allowed; }
.controls button:not(:disabled):hover{ background:#f2f5ff; border-color:#c9d6ff; }
.controls button.primary:not(:disabled):hover{ background:var(--brand-ink); border-color:var(--brand-ink); }
.controls button:focus-visible{ outline:var(--focus-ring); outline-offset:2px; }

.timer{ font-variant-numeric:tabular-nums; font-weight:700; padding:.2rem .6rem; border-radius:8px; border:1px solid var(--divider); }

/* =============================== Board =============================== */
.board{
  background:var(--bg-alt); border:1px solid var(--divider); border-radius:var(--radius);
  padding:16px; margin:1rem 0 1.25rem; max-height:62vh; overflow:auto;
}
.line{ display:flex; flex-wrap:wrap; align-items:flex-start; gap:10px; justify-content:flex-start; }

.cell{ display:grid; grid-template-rows:auto auto auto; gap:4px; justify-items:center; min-width:50px; padding:2px 0; }
.pyny{ display:flex; gap:2px; align-items:center; min-height:24px; white-space:nowrap; }
.pyny .l{ font-size:15px; line-height:1.1; padding:1px 2px; border-radius:6px; border:1px dashed transparent; }

.hanzi{ font-size:clamp(20px,2.2vw + 10px,28px); line-height:1.15; letter-spacing:.1px; padding:4px 6px; border-radius:10px; white-space:nowrap; }
.ans{ font-size:14px; line-height:1; min-height:18px; color:var(--ok); white-space:nowrap; }
.ans.hidden{ visibility:hidden; }

.pending{ color:var(--pending); }
.ok{ color:var(--ok); }
.bad{ color:var(--bad); }

.current{ outline:2px solid rgba(37,99,235,.45); outline-offset:2px; border-radius:8px; }

.pyny.hidden{ visibility:hidden; }
.cell.skip .hanzi{ color:#666; }

/* Ghost input: hidden but focusable */
[data-role="ghost"]{
  position:fixed !important; left:-9999px !important; top:auto !important;
  width:1px !important; height:1px !important; margin:0 !important; padding:0 !important; border:0 !important;
  outline:none !important; background:transparent !important; box-shadow:none !important; opacity:0 !important;
  pointer-events:none !important;
}

/* =============================== Stats =============================== */
.stats{ display:flex; gap:10px; flex-wrap:wrap; color:var(--muted); margin-top:8px; font-size:15px; }
.stats > div{ background:#fff; border:1px solid var(--divider); border-radius:999px; padding:6px 10px; }
.stats b{ color:var(--ink); font-variant-numeric:tabular-nums; }

/* ============================ Share & Tag ============================ */
.sharebar{ margin-top:10px; display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.tag{ display:inline-block; padding:2px 8px; border-radius:999px; background:#fff; border:1px solid var(--divider); color:var(--muted); font-size:12px; }

/* =========================== Leaderboard (compact) =========================== */
.rank{
  background:#fff; border:1px solid var(--divider); border-radius:8px; padding:10px; margin-top:12px;
}
.rank h2{ font-size:16px; color:var(--ink); margin:0 0 6px; }
.rank .ops{ display:flex; gap:6px; align-items:center; margin-bottom:6px; flex-wrap:wrap; }

.rank table{ width:100%; border-collapse:collapse; font-size:13px; }
.rank thead th{
  text-align:left; padding:6px 4px; color:var(--muted);
  border-bottom:1px solid var(--divider); font-weight:600; letter-spacing:.3px;
}
.rank tbody td{ padding:6px 4px; border-bottom:1px solid var(--divider); }
.rank tbody tr:nth-child(odd){ background:var(--bg-alt); }
.rank tbody tr:hover{ background:#eef2ff; }
.rank tbody td[colspan="5"]{ color:#667085; }

/* ================================ Modal ================================ */
.modal{ position:fixed; inset:0; background:rgba(15,23,42,.45); display:none; align-items:center; justify-content:center; z-index:9999; }
.modal .card{ background:#fff; border:1px solid var(--divider); border-radius:12px; padding:16px; width:min(92vw,420px); }
.modal h3{ margin:0 0 8px; color:var(--ink); font-size:18px; }
.modal p{ margin:0 0 12px; color:var(--muted); font-size:14px; }
.modal .row{ display:flex; gap:8px; margin-top:10px; }
.modal input{ flex:1; padding:.6rem .7rem; border:1px solid var(--divider); border-radius:10px; background:#fff; }
.modal input:focus{ outline:var(--focus-ring); outline-offset:2px; }
.modal button{ border:1px solid var(--divider); background:#fff; border-radius:8px; padding:.55rem .9rem; font-weight:600; cursor:pointer; }
.modal button.primary{ border-color:var(--brand); background:var(--brand); color:#fff; }
.modal button:not(:disabled):hover{ background:#f2f5ff; }
.modal button.primary:not(:disabled):hover{ background:var(--brand-ink); }

/* ================================ Help ================================ */
.help{ background:var(--bg-alt); border:1px solid var(--divider); border-radius:10px; padding:10px 12px; color:var(--muted); margin-top:.75rem; line-height:1.6; font-size:14px;margin-bottom:15px;}
.kbd{ font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace; border:1px solid var(--divider); padding:1px 6px; border-radius:6px; background:#f8f9fa; }

/* =============================== Dark mode =============================== */
@media (prefers-color-scheme: dark){
  :root{
    --ink:#e6e7ea; --muted:#a9b0bb; --bg:#0b0f14; --bg-alt:#0f141b; --divider:#222b36;
    --brand:#5b8aff; --brand-ink:#4779ff;
  }
  body{ background:var(--bg); color:var(--ink); }
  .controls select, .controls button, .stats > div, .rank, .board, .modal .card, .help{
    background:#0f141b; color:var(--ink); border-color:var(--divider);
  }
  .rank tbody tr:nth-child(odd){ background:#0c1116; }
  .rank tbody tr:hover{ background:#111827; }
  .controls button:not(:disabled):hover{ background:#111827; border-color:#2a3750; }
  .controls button.primary:not(:disabled):hover{ background:var(--brand-ink); }
  .current{ outline-color: color-mix(in oklab, var(--brand) 80%, #000); }
}
/* Save 按钮加载态（扁平风） */
button[data-loading="1"]{
  position: relative;
  pointer-events: none;          /* 防止重复点击 */
  opacity: .95;                  /* 轻微变化表示正在处理 */
}
button[data-loading="1"]::after{
  content: "";
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  width: 14px; height: 14px;
  border: 2px solid currentColor;   /* 继承文字色：白字按钮=白圈，黑字按钮=黑圈 */
  border-right-color: transparent;  /* 形成缺口 */
  border-radius: 50%;
  animation: pt-spin .8s linear infinite;
}
@keyframes pt-spin{ to{ transform: translateY(-50%) rotate(360deg); } }