/* ============================================================
   华容道合集 · 样式
   ============================================================ */
:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e3e6ea;
  --border-strong: #cfd4da;
  --text: #1f2329;
  --text-2: #5b6572;
  --text-3: #8b95a1;
  --primary: #2f6feb;
  --primary-weak: #e8f0fe;
  --ok: #18a058;
  --warn: #f0a020;
  --danger: #e5484d;
  --grid-line: #dfe3e8;
  --board-bg: #fbfcfd;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
  --radius: 12px;
  --cell: 56px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 650; }

/* ---------------- 页头 ---------------- */
.app-header {
  padding: 18px 24px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  width: 42px; height: 42px; flex: none;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #2f6feb, #7c4dff);
  color: #fff; font-size: 22px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(47, 111, 235, .28);
}
.brand h1 { font-size: 19px; letter-spacing: .5px; }
.brand .sub { margin: 2px 0 0; color: var(--text-3); font-size: 12.5px; }

.tabs { display: flex; gap: 4px; margin-top: 16px; }
.tab-btn {
  appearance: none; border: none; background: transparent;
  padding: 10px 18px; font-size: 14.5px; font-weight: 600;
  color: var(--text-2); cursor: pointer; border-radius: 8px 8px 0 0;
  border-bottom: 2px solid transparent; font-family: inherit;
}
.tab-btn:hover { color: var(--text); background: var(--surface-2); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

main { padding: 20px 24px 24px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------------- 布局 ---------------- */
.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 18px;
  align-items: start;
}
.board-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.side-panel { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 16px; }
.panel-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}
.panel-block h3 { font-size: 14px; margin-bottom: 10px; display: flex; justify-content: space-between; align-items: baseline; }
.panel-block.grow { display: flex; flex-direction: column; min-height: 220px; }

/* ---------------- 控件 ---------------- */
.board-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.board-bar label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); }
.spacer { flex: 1; }
.mode-switch { display: inline-flex; background: var(--surface-2); border-radius: 8px; padding: 2px; }

.btn {
  appearance: none; font-family: inherit;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  padding: 7px 14px; border-radius: 8px;
  font-size: 13px; font-weight: 550; cursor: pointer;
  transition: .15s;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: #2560d4; color: #fff; }
.btn.danger { color: #c0392b; border-color: #f0b8b2; background: #fff; }
.btn.danger:hover { background: #fdecea; border-color: #e5484d; }
#pk-level-name { width: 190px; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn.sm.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

select, input[type="number"] {
  font-family: inherit; font-size: 13px;
  border: 1px solid var(--border-strong); border-radius: 7px;
  padding: 6px 8px; background: var(--surface); color: var(--text);
  max-width: 190px;
}
input[type="number"] { width: 66px; }

.form-row { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.form-row label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); }
.tip { color: var(--text-3); font-size: 12.5px; margin: 6px 0 0; }

.chip {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px 12px; font-size: 12.5px; color: var(--text-2);
}
.chip b { color: var(--text); font-variant-numeric: tabular-nums; }
.status-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

/* ---------------- 棋盘 ---------------- */
.board-wrap { position: relative; display: flex; justify-content: center; }
.board {
  position: relative;
  background-color: var(--board-bg);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
  border: 2px solid var(--border-strong);
  border-radius: 8px;
  touch-action: none;
  user-select: none;
  overflow: visible;
}
.cell-hit { position: absolute; }

/* 小车（俯视 SVG 造型） */
.car {
  position: absolute;
  display: block;
  cursor: grab;
  filter: drop-shadow(0 2px 5px rgba(16, 24, 40, .3));
  transition: left .16s ease, top .16s ease, filter .15s, outline-color .15s;
  outline: 2px solid transparent;
  z-index: 2;
}
.car .car-svg { display: block; width: 100%; height: 100%; pointer-events: none; }
.car.dragging {
  cursor: grabbing; transition: none; z-index: 20;
  filter: drop-shadow(0 10px 18px rgba(16, 24, 40, .38));
}
.car.selected { outline-color: #1f2329; }
.car.hint { animation: pulse 1.1s infinite; }
@keyframes pulse {
  0%, 100% { filter: drop-shadow(0 2px 5px rgba(16,24,40,.3)) drop-shadow(0 0 2px rgba(47,111,235,.95)); }
  50% { filter: drop-shadow(0 2px 5px rgba(16,24,40,.3)) drop-shadow(0 0 11px rgba(47,111,235,.3)); }
}

/* 出口 */
.exit-mark {
  position: absolute; z-index: 3;
  background: repeating-linear-gradient(45deg, #fff 0 6px, #ffd666 6px 12px);
  border: 2px dashed #f0a020;
  display: grid; place-items: center;
  font-size: 11px; color: #a35829; font-weight: 700;
}

/* 数字华容道 */
.num-board .tile {
  position: absolute;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff, #f2f5fa);
  border: 1px solid var(--border-strong);
  font-size: 22px; font-weight: 700; color: #27303d;
  box-shadow: 0 2px 5px rgba(16, 24, 40, .1);
  cursor: pointer;
  transition: left .14s ease, top .14s ease, background .2s;
  user-select: none;
}
.num-board .tile.correct { background: linear-gradient(180deg, #e9f7ef, #d6f0e2); border-color: #9ddbb6; color: #14663c; }
.num-board .tile.movable:hover { border-color: var(--primary); }
.num-board .tile.hint { animation: pulse 1.1s infinite; }

/* 三国华容道 */
.kl-board .blk {
  position: absolute;
  display: grid; place-items: center;
  border-radius: 8px;
  color: #fff; font-weight: 700;
  cursor: grab;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, .15), 0 3px 8px rgba(16, 24, 40, .2);
  transition: left .14s ease, top .14s ease;
  user-select: none;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .25);
}
.kl-board .blk.dragging { transition: none; z-index: 25; box-shadow: 0 10px 22px rgba(16, 24, 40, .35); }
.kl-board .blk.selected { outline: 3px solid #1f2329; }
.kl-board .blk.hint { animation: pulse 1.1s infinite; }
.kl-exit {
  position: absolute; z-index: 0;
  border: 2px dashed #e5484d; border-radius: 4px;
  background: rgba(229, 72, 77, .07);
  display: grid; place-items: center;
  font-size: 11px; color: var(--danger); font-weight: 700;
}

/* 胜利横幅 */
.win-banner {
  position: absolute; inset: 0; display: none;
  place-items: center; z-index: 40;
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(2px);
  border-radius: 8px;
}
.win-banner.show { display: grid; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.win-inner {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 26px; box-shadow: var(--shadow);
  font-size: 17px; font-weight: 700; text-align: center;
}
.win-inner span { display: block; margin-top: 6px; font-size: 13px; font-weight: 500; color: var(--text-2); }

/* ---------------- 步骤列表 ---------------- */
.step-list {
  list-style: none; margin: 0; padding: 0;
  overflow-y: auto; flex: 1; max-height: 46vh;
  font-size: 13px;
}
.step-list li {
  padding: 6px 10px; border-radius: 7px;
  display: flex; gap: 8px; align-items: baseline;
  color: var(--text-2);
}
.step-list li:nth-child(odd) { background: var(--surface-2); }
.step-list li .idx { color: var(--text-3); font-variant-numeric: tabular-nums; min-width: 26px; }
.step-list li.cur { background: var(--primary-weak); color: var(--primary); font-weight: 600; }
.step-list li.done { text-decoration: line-through; opacity: .55; }

/* 车辆列表 / 颜色 */
.car-list { max-height: 150px; overflow-y: auto; margin: 8px 0; }
.car-item {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 8px; border-radius: 7px; font-size: 12.5px;
  border: 1px solid transparent;
}
.car-item.sel { background: var(--primary-weak); border-color: var(--primary); }
.brush-preview { display: flex; align-items: center; gap: 10px; margin: 6px 0 2px; }
.brush-preview .brush-svg { display: block; width: 74px; height: 40px; }
.brush-preview .brush-svg .car-svg { display: block; width: 100%; height: 100%; }
.car-item .swatch { width: 30px; height: 17px; flex: none; display: block; }
.car-item .swatch .car-svg { display: block; width: 100%; height: 100%; }
.car-item .grow { flex: 1; }
.car-item .mini {
  border: 1px solid var(--border-strong); background: var(--surface);
  border-radius: 5px; padding: 1px 6px; font-size: 11.5px; cursor: pointer; color: var(--text-2);
}
.car-item .mini:hover { color: var(--primary); border-color: var(--primary); }

.colors { gap: 6px; }
.swatch-btn {
  width: 26px; height: 22px; border-radius: 6px; cursor: pointer;
  border: 2px solid transparent; box-shadow: inset 0 -2px 0 rgba(0, 0, 0, .12);
}
.swatch-btn.active { border-color: #1f2329; transform: scale(1.08); }

.legend { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.legend span {
  font-size: 12px; padding: 2px 8px; border-radius: 6px; color: #fff; font-weight: 600;
}

/* ---------------- 页脚 ---------------- */
/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .game-layout { grid-template-columns: 1fr; }
  .side-panel { position: static; }
  .step-list { max-height: 240px; }
  main { padding: 14px; }
  .app-header { padding: 14px 14px 0; }
}