:root {
  color-scheme: light;
  --bg: #f5f7f1;
  --ink: #1f2826;
  --muted: #66736f;
  --line: #d8dfd6;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-solid: #ffffff;
  --cell: #e8f0e2;
  --cell-alt: #dde9db;
  --slot: #a8b7ac;
  --wall: #26302d;
  --accent: #1b7f67;
  --accent-2: #d6534f;
  --accent-3: #2f5fb3;
  --gold: #c89b2a;
  --shadow: 0 22px 55px rgba(38, 48, 45, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(120deg, rgba(27, 127, 103, 0.10), transparent 34%),
    linear-gradient(230deg, rgba(214, 83, 79, 0.10), transparent 32%),
    var(--bg);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(236px, 290px) minmax(360px, 1fr) minmax(220px, 280px);
  gap: 18px;
  min-height: 100vh;
  padding: 18px;
}

.panel {
  border: 1px solid rgba(216, 223, 214, 0.85);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.side-panel,
.right-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background:
    linear-gradient(90deg, transparent 43%, var(--wall) 43% 57%, transparent 57%),
    linear-gradient(0deg, transparent 43%, var(--wall) 43% 57%, transparent 57%),
    #dcead9;
  box-shadow: inset 0 0 0 1px rgba(31, 40, 38, 0.08);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.1;
}

h2 {
  margin-top: 4px;
  font-size: 20px;
  line-height: 1.2;
}

.brand p,
.eyebrow,
.section-title,
.field span,
.metric-grid span,
.player-card small {
  color: var(--muted);
  font-size: 12px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
}

.toolbox {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
}

.segmented button,
.tool {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.segmented button.active,
.tool.active {
  color: var(--ink);
  background: var(--panel-solid);
  box-shadow: 0 7px 18px rgba(38, 48, 45, 0.10);
}

.control-block {
  display: grid;
  gap: 12px;
}

.online-step {
  display: grid;
  gap: 12px;
}

.model-step {
  display: grid;
  gap: 12px;
}

.choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.choice-button {
  min-height: 44px;
}

.step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 34px;
}

.step-header strong {
  font-size: 15px;
}

.room-state {
  min-height: 36px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.64);
  font-size: 13px;
}

.field {
  display: grid;
  gap: 6px;
}

select,
input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 11px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  outline: none;
}

select:focus,
input:focus {
  border-color: rgba(27, 127, 103, 0.55);
  box-shadow: 0 0 0 3px rgba(27, 127, 103, 0.12);
}

.primary,
.secondary,
.mini {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--accent);
  box-shadow: 0 12px 22px rgba(27, 127, 103, 0.18);
}

.secondary,
.mini {
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--panel-solid);
  box-shadow: none;
}

.mini {
  min-height: 32px;
  padding: 0 10px;
}

.split-row {
  display: grid;
  grid-template-columns: 1fr 104px;
  gap: 8px;
}

.room-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(232, 240, 226, 0.72);
}

.room-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.room-card strong {
  font-size: 22px;
  letter-spacing: 2px;
}

.external-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(27, 127, 103, 0.28);
  border-radius: 8px;
  background: rgba(232, 240, 226, 0.58);
}

.external-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.external-card strong {
  display: block;
  max-width: 160px;
  overflow: hidden;
  color: var(--ink);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.command-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid rgba(47, 95, 179, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.66);
}

.command-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.command-card code {
  display: block;
  max-width: 170px;
  overflow: hidden;
  color: var(--ink);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.players {
  display: grid;
  gap: 10px;
}

.player-card {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
}

.player-card.current {
  border-color: rgba(27, 127, 103, 0.48);
  background: rgba(232, 240, 226, 0.8);
}

.player-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.player-card strong {
  display: block;
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wall-pill {
  min-width: 36px;
  padding: 4px 7px;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(216, 223, 214, 0.65);
  text-align: center;
  font-size: 12px;
}

.board-section {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 18px;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
}

.toolbox {
  width: min(342px, 48vw);
}

.tool {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.tool-icon {
  position: relative;
  width: 18px;
  height: 18px;
  display: inline-block;
}

.pawn-icon::before {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: currentColor;
}

.hwall-icon::before,
.vwall-icon::before {
  content: "";
  position: absolute;
  border-radius: 3px;
  background: currentColor;
}

.hwall-icon::before {
  left: 1px;
  right: 1px;
  top: 7px;
  height: 4px;
}

.vwall-icon::before {
  top: 1px;
  bottom: 1px;
  left: 7px;
  width: 4px;
}

.board-wrap {
  display: grid;
  place-items: center;
  min-height: 0;
  padding: clamp(10px, 2vw, 22px);
}

#boardSvg {
  width: min(100%, 78vh);
  max-height: calc(100vh - 150px);
  aspect-ratio: 1;
  overflow: visible;
}

.goal-band {
  opacity: 0.28;
}

.cell {
  fill: var(--cell);
  stroke: rgba(31, 40, 38, 0.06);
  stroke-width: 1;
  transition: fill 130ms ease, transform 130ms ease;
}

.cell.alt {
  fill: var(--cell-alt);
}

.cell.target {
  fill: #f7df91;
  cursor: pointer;
}

.cell.target:hover {
  fill: #ffd96b;
}

.wall-slot {
  fill: var(--slot);
  opacity: 0.16;
  cursor: pointer;
}

.wall-slot:hover {
  opacity: 0.46;
}

.wall-slot.illegal {
  fill: var(--accent-2);
  opacity: 0.06;
  cursor: not-allowed;
}

.wall-slot.illegal:hover {
  opacity: 0.28;
}

.wall-placed {
  fill: var(--wall);
  filter: drop-shadow(0 5px 7px rgba(31, 40, 38, 0.22));
}

.pawn {
  filter: drop-shadow(0 10px 12px rgba(31, 40, 38, 0.28));
}

.pawn-ring {
  fill: none;
  stroke: rgba(255, 255, 255, 0.86);
  stroke-width: 4;
  opacity: 0.72;
  transform-box: fill-box;
  transform-origin: center;
}

.pawn-label {
  fill: white;
  font-size: 18px;
  font-weight: 800;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}

.pawn.current .pawn-ring {
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.68;
    transform: scale(1);
  }
  50% {
    opacity: 0.34;
    transform: scale(1.08);
  }
}

.right-panel {
  overflow: hidden;
}

.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric-grid > div {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
}

.metric-grid strong {
  display: block;
  margin-top: 5px;
  font-size: 22px;
}

.section-title {
  margin-bottom: 10px;
}

.log-list {
  display: grid;
  gap: 8px;
  max-height: calc(100vh - 180px);
  margin: 0;
  padding: 0;
  overflow: auto;
  list-style: none;
}

.log-list li {
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 20;
  min-width: 180px;
  max-width: min(420px, calc(100vw - 28px));
  padding: 12px 16px;
  border-radius: 8px;
  color: white;
  background: rgba(31, 40, 38, 0.92);
  box-shadow: var(--shadow);
  transform: translate(-50%, 18px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.hidden {
  display: none !important;
}

@media (max-width: 1060px) {
  .app-shell {
    grid-template-columns: minmax(220px, 280px) 1fr;
  }

  .right-panel {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 220px 1fr;
  }

  .log-list {
    max-height: 170px;
  }
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 10px;
  }

  .side-panel,
  .right-panel {
    padding: 14px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbox {
    width: 100%;
  }

  .right-panel {
    display: flex;
  }

  #boardSvg {
    width: 100%;
    max-height: none;
  }
}