/* ================= 主题变量 ================= */
:root {
  --bg: #f7f7f8;
  --card: #ffffff;
  --card-2: #fafafb;
  --line: #e6e6e8;
  --line-strong: #d4d4d8;
  --ink: #111114;
  --ink-2: #55555c;
  --ink-3: #8e8e96;
  --board-bg: #ffffff;
  --board-line: #111114;
  --board-label: #8e8e96;
  --stone-black: #111114;
  --stone-white: #ffffff;
  --stone-white-edge: #111114;
  --primary-bg: #111114;
  --primary-ink: #ffffff;
  --primary-bg-hover: #2b2b30;
  --err: #b91c1c;
  --err-bg: #fef2f2;
  --ok: #15803d;
  --warn: #b45309;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05);
}
[data-theme="dark"] {
  --bg: #0e0e11;
  --card: #17171b;
  --card-2: #1d1d22;
  --line: #2a2a31;
  --line-strong: #3a3a44;
  --ink: #f2f2f4;
  --ink-2: #b4b4bd;
  --ink-3: #7c7c88;
  --board-bg: #e9e9e4;
  --board-line: #2a2a30;
  --board-label: #7a7a82;
  --stone-black: #16161a;
  --stone-white: #fbfbf8;
  --stone-white-edge: #16161a;
  --primary-bg: #f2f2f4;
  --primary-ink: #111114;
  --primary-bg-hover: #d8d8dd;
  --err: #f87171;
  --err-bg: #2a1618;
  --ok: #4ade80;
  --warn: #fbbf24;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
}

/* ================= 基础 ================= */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 22px 18px 50px;
  transition: background .2s, color .2s;
}
.app { max-width: 1500px; margin: 0 auto; }

/* ================= 顶栏 ================= */
.topbar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.topbar h1 { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: .4px; }
.topbar .sub { color: var(--ink-3); font-size: 12.5px; margin-right: auto; }
.topbar .spacer { flex: 1; }

/* ================= 按钮 ================= */
button {
  font-family: inherit; font-size: 13px; font-weight: 500; cursor: pointer;
  border-radius: var(--radius-sm); padding: 8px 14px; transition: .15s;
  border: 1px solid var(--line-strong); background: var(--card); color: var(--ink);
}
button:hover { background: var(--card-2); }
button:active { transform: translateY(1px); }
button.primary { background: var(--primary-bg); color: var(--primary-ink); border-color: var(--primary-bg); }
button.primary:hover { background: var(--primary-bg-hover); }
button.tiny { padding: 5px 10px; font-size: 12px; }
button:disabled { opacity: .4; cursor: not-allowed; transform: none; }
button.danger { color: var(--err); border-color: var(--line-strong); }

/* ================= 布局 ================= */
.grid { display: grid; grid-template-columns: minmax(0,1fr) 480px; gap: 18px; align-items: start; }
@media (max-width: 1180px) { .grid { grid-template-columns: 1fr; } }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.card + .card { margin-top: 14px; }
.card-h {
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.card-h h2 { margin: 0; font-size: 13.5px; font-weight: 600; letter-spacing: .3px; display: flex; align-items: center; gap: 8px; }
.card-b { padding: 14px 16px; }

/* ================= 棋盘 ================= */
.board-card { padding: 16px; display: flex; justify-content: center; }
#board { display: block; width: 100%; max-width: 660px; height: auto; border-radius: var(--radius-sm); }

.status {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 16px; border-top: 1px solid var(--line); font-size: 13.5px; font-weight: 500;
}
.stone-dot { width: 14px; height: 14px; border-radius: 50%; flex: none; display: inline-block; }
.stone-dot.black { background: var(--stone-black); }
.stone-dot.white { background: var(--stone-white); border: 1.5px solid var(--stone-white-edge); }
.status .meta { margin-left: auto; color: var(--ink-3); font-size: 12px; font-weight: 400; }

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; padding: 12px 16px; border-top: 1px solid var(--line); }
.speed { margin-left: auto; display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--ink-2); }
.speed input[type=range] { width: 96px; accent-color: var(--primary-bg); }

/* ================= 表单 ================= */
label.f { display: block; margin-bottom: 10px; }
label.f > span { display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 4px; }
input[type=text], input[type=password], select, textarea {
  width: 100%; font-family: inherit; font-size: 12.5px; color: var(--ink);
  padding: 8px 10px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--card-2); outline: none; transition: .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--ink); background: var(--card); }
select { cursor: pointer; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.hint { font-size: 11.5px; color: var(--ink-3); line-height: 1.6; }
.inline { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--ink-2); }
.inline input[type=checkbox] { accent-color: var(--primary-bg); }

/* ================= 选手卡 ================= */
.player { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 12px; margin-bottom: 10px; background: var(--card-2); }
.player:last-child { margin-bottom: 0; }
.player-head { display: flex; align-items: center; gap: 8px; margin-bottom: 9px; }
.player-head .name { font-weight: 600; font-size: 13px; flex: 1; }
.player-head .idx { font-size: 11px; color: var(--ink-3); }

/* ================= 战绩榜 ================= */
table.lb { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.lb th, table.lb td { padding: 7px 6px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.lb th { color: var(--ink-3); font-weight: 500; font-size: 11.5px; }
table.lb th:first-child, table.lb td:first-child { text-align: left; }
table.lb tr:last-child td { border-bottom: none; }
table.lb .pname { display: flex; align-items: center; gap: 6px; font-weight: 500; }
table.lb .rank1 { color: var(--ok); font-weight: 700; }
.mini-dot { width: 10px; height: 10px; border-radius: 50%; flex: none; display: inline-block;
  border: 1.5px solid rgba(0,0,0,.28); vertical-align: -1px; }
.player-head .pdot { width: 14px; height: 14px; border-radius: 50%; flex: none;
  border: 1.5px solid rgba(0,0,0,.28); display: inline-block; }

/* 行内组合：输入框 + 按钮 */
.row-inline { display: flex; gap: 6px; align-items: center; }
.row-inline > select, .row-inline > input { flex: 1; min-width: 0; }
.row-inline > button { flex: none; }

/* 颜色选择 */
.swatches { display: flex; gap: 7px; flex-wrap: wrap; padding-top: 2px; }
.sw { width: 22px; height: 22px; border-radius: 50%; cursor: pointer; display: inline-block;
  border: 2px solid transparent; box-shadow: inset 0 0 0 1px rgba(0,0,0,.22); transition: transform .12s; }
.sw:hover { transform: scale(1.14); }
.sw.on { border-color: var(--ink); box-shadow: 0 0 0 2px var(--card), 0 0 0 3px var(--ink); }

/* ================= 日志 ================= */
#log { max-height: 300px; overflow-y: auto; }
.log-item { padding: 8px 2px; border-bottom: 1px solid var(--line); font-size: 12.5px; line-height: 1.6; }
.log-item:last-child { border-bottom: none; }
.log-top { display: flex; align-items: center; gap: 8px; }
.log-tag { font-weight: 600; }
.log-move { font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--card-2); border: 1px solid var(--line);
  padding: 1px 6px; border-radius: 6px; font-size: 11.5px; }
.log-time { margin-left: auto; color: var(--ink-3); font-size: 11px; }
.log-toggle { cursor: pointer; color: var(--ink-3); font-size: 11px; user-select: none; }
.log-toggle:hover { color: var(--ink); }
.log-raw { color: var(--ink-3); word-break: break-word; white-space: pre-wrap; font-size: 11.5px;
  margin-top: 5px; padding: 7px 9px; background: var(--card-2); border-radius: 7px; border: 1px solid var(--line); }
.log-item.err .log-raw { color: var(--err); }
.empty { color: var(--ink-3); font-size: 12.5px; text-align: center; padding: 16px 0; }

#thinking { padding: 10px 12px; background: var(--card-2); border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm); font-size: 11.5px; color: var(--ink-2); line-height: 1.6;
  max-height: 130px; overflow-y: auto; white-space: pre-wrap; word-break: break-word;
  font-family: ui-monospace, Menlo, Consolas, monospace; }
#thinking.collapsed { max-height: 34px; overflow: hidden; }

.spinner { display: inline-block; width: 11px; height: 11px; border: 2px solid var(--line-strong);
  border-top-color: var(--ink); border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -1px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ================= AI 对话 ================= */
#chat { max-height: 340px; overflow-y: auto; }
.chat-item { padding: 7px 4px 8px 10px; border-bottom: 1px solid var(--line);
  border-left: 3px solid var(--line-strong); margin-bottom: 6px; font-size: 12.5px; line-height: 1.65;
  border-radius: 0 6px 6px 0; }
.chat-item:last-child { border-bottom: none; }
.chat-head { display: flex; align-items: center; gap: 7px; margin-bottom: 3px; font-weight: 600; }
.chat-head .mv { font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--card-2);
  border: 1px solid var(--line); padding: 0 6px; border-radius: 6px; font-size: 11.5px; font-weight: 400; color: var(--ink-2); }
.chat-body { color: var(--ink-2); white-space: pre-wrap; word-break: break-word; }
.chat-sep { text-align: center; color: var(--ink-3); font-size: 11px; margin: 10px 0 8px;
  padding-top: 8px; border-top: 1px dashed var(--line-strong); }
.chat-sep:first-child { margin-top: 2px; border-top: none; padding-top: 0; }

/* ================= 其他 ================= */
.banner { display: none; background: var(--err-bg); border: 1px solid var(--err); color: var(--err);
  border-radius: var(--radius-sm); padding: 11px 14px; margin-bottom: 14px; font-size: 12.5px; line-height: 1.7; }
.banner code { background: var(--card); padding: 1px 6px; border-radius: 5px; font-family: ui-monospace, Consolas, monospace; }
.tag { display: inline-block; padding: 1px 7px; border-radius: 9px; font-size: 11px; font-weight: 600;
  background: var(--card-2); border: 1px solid var(--line-strong); color: var(--ink-2); }
.tag.ok { color: var(--ok); }
.tag.err { color: var(--err); }