/* 中国象棋刷题网站 — 全站样式 */

:root {
  --bg: #f5f2ec;
  --panel: #fffdf9;
  --ink: #2f2a24;
  --ink-soft: #6b6156;
  --line: #ddd4c6;
  --red: #d21f13;
  --black-piece: #17181c;
  /* 盘面配色参照常见对弈软件：灰绿盘面 + 黑线 + 浅木纹边框，久看不累眼 */
  --board-bg: #d9c6a5;
  --board-face: #c9cf8d;
  --board-line: #2b2b25;
  --accent: #1f6f5c;
  --accent-soft: #e6f0ec;
  --warn: #b8860b;
  --danger: #c0392b;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(80, 60, 30, .10);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC",
               "Source Han Sans SC", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 布局 ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 22px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.topbar h1 {
  font-size: 17px;
  margin: 0;
  letter-spacing: 2px;
  font-weight: 600;
}
.topbar .spacer { flex: 1; }
.topbar nav { display: flex; gap: 14px; font-size: 14px; }
.topbar .who { color: var(--ink-soft); font-size: 14px; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 22px 60px;
}
.narrow { max-width: 420px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 18px; }
.card h2 {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1px;
}

.row { display: flex; gap: 20px; align-items: flex-start; }
.row > .grow { flex: 1; min-width: 0; }
/* 棋盘列：SVG 无固有宽度，flex 下会缩到 300px 默认值，必须给明确宽度 */
.row > div:not(.grow) { width: 640px; max-width: 100%; flex-shrink: 0; }

@media (max-width: 860px) {
  .row { flex-direction: column; }
  .row > * { width: 100%; }
}

/* ---------- 表单 ---------- */

.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 5px;
}
input[type=text], input[type=password], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; min-height: 68px; font-family: ui-monospace, monospace; }

button {
  padding: 9px 18px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: opacity .15s;
}
button:hover { opacity: .88; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.ghost {
  background: transparent;
  color: var(--accent);
}
button.plain {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-soft);
}
button.full { width: 100%; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.tabs button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  color: var(--ink-soft);
  padding: 8px 14px;
}
.tabs button.on {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* ---------- 提示条 ---------- */

.msg {
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 14px;
  display: none;
}
.msg.show { display: block; }
.msg.err { background: #fdecea; color: var(--danger); border: 1px solid #f5c6c2; }
.msg.ok  { background: var(--accent-soft); color: var(--accent); border: 1px solid #bfdcd3; }
.msg.warn{ background: #fdf6e3; color: var(--warn); border: 1px solid #efe0b4; }

.hint { color: var(--ink-soft); font-size: 13px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13px; }

/* ---------- 棋盘 ---------- */

.board-wrap {
  width: 100%;
  /* 默认按视口高度自适应：桌面大屏放大到 640px，仍保证整盘无滚动可见 */
  max-width: min(640px, calc((100vh - 210px) * 0.9));
  background: var(--board-bg);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: var(--shadow);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.board-wrap.is-locked { cursor: progress; }
.board-wrap.is-locked .xq-piece { cursor: progress; }

.xq-board { touch-action: manipulation; }

.xq-outer { fill: var(--board-face); stroke: var(--board-line); stroke-width: 1.6; }
.xq-line  { stroke: var(--board-line); stroke-width: 1.1; }
.xq-cross { fill: none; stroke: var(--board-line); stroke-width: 1.1; opacity: .75; }
.xq-river {
  fill: var(--board-line);
  font-size: 24px;
  letter-spacing: 10px;
  text-anchor: middle;
  dominant-baseline: middle;
  opacity: .8;
  font-family: "KaiTi", "STKaiti", serif;
}

.xq-piece { cursor: pointer; transition: transform .22s ease-out; }
.xq-disc { fill: #fefdf6; stroke-width: 1.6; }
.xq-ring { fill: none; stroke-width: 1.2; }
.xq-name {
  font-size: 30px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: central;
  font-family: "KaiTi", "STKaiti", "PingFang SC", serif;
}
.xq-red   .xq-disc { stroke: var(--red); }
.xq-red   .xq-ring { stroke: var(--red); }
.xq-red   .xq-name { fill: var(--red); }
.xq-black .xq-disc { stroke: var(--black-piece); }
.xq-black .xq-ring { stroke: var(--black-piece); }
.xq-black .xq-name { fill: var(--black-piece); }

.xq-captured { opacity: 0; transition: opacity .18s; }

.xq-hint-move    { fill: var(--accent); opacity: .42; pointer-events: none; }
.xq-hint-capture { fill: none; stroke: var(--accent); stroke-width: 3; opacity: .65; pointer-events: none; }
.xq-selected     { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.xq-last         { fill: none; stroke: var(--warn); stroke-width: 2; opacity: .8; }

/* ---------- 状态面板 ---------- */

.status-list { list-style: none; margin: 0; padding: 0; }
.status-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.status-list li:last-child { border-bottom: none; }
.status-list .k { color: var(--ink-soft); }
.status-list .v { font-weight: 600; }
.status-list .v.red { color: var(--red); }
.status-list .v.ok { color: var(--accent); }

.movelog {
  font-family: ui-monospace, monospace;
  font-size: 13px;
  max-height: 190px;
  overflow-y: auto;
  background: #fbf8f2;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
  white-space: pre-wrap;
  color: var(--ink-soft);
  margin: 0;
}