* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #10151d;
  --panel: #171e2a;
  --card: #1d2735;
  --line: #2b3850;
  --text: #d7e0ea;
  --muted: #7d8ea3;
  --accent: #3ea6ff;
  --green: #2ecc71;
  --red: #e74c3c;
  --yellow: #f1c40f;
}

html, body {
  background: radial-gradient(1200px 700px at 20% -10%, #1b2636, var(--bg));
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 26px;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 18, 26, 0.6);
}

.brand h1 { font-size: 20px; letter-spacing: 1px; }
.brand p { font-size: 12px; color: var(--muted); margin-top: 2px; }

.clock {
  font-family: "Consolas", "Menlo", monospace;
  font-size: 26px;
  color: var(--accent);
  letter-spacing: 2px;
}

.layout {
  display: flex;
  gap: 18px;
  padding: 18px;
  max-width: 1460px;
  margin: 0 auto;
  align-items: flex-start;
}

.board-wrap {
  flex: 1;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}

#board {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: #0c121b;
  cursor: pointer;
}

.hint {
  font-size: 12px;
  color: var(--muted);
  padding: 8px 4px 2px;
  text-align: center;
}

.panel {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.card h3 {
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 10px;
  border-left: 3px solid var(--accent);
  padding-left: 8px;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}
.row label { font-size: 12px; color: var(--muted); margin-right: 2px; }

.btn {
  flex: 1;
  padding: 8px 10px;
  background: #243044;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
}
.btn:hover { background: #2d3b54; }
.btn:active { transform: scale(0.97); }
.btn.small { flex: 0 1 auto; padding: 5px 12px; font-size: 12px; }
.btn.active { background: var(--accent); color: #081018; border-color: var(--accent); font-weight: 600; }

.speed-btns { display: flex; gap: 6px; }

select#trainSelect {
  flex: 1;
  padding: 7px 8px;
  background: #243044;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}
select#trainSelect:focus { outline: none; border-color: var(--accent); }
select#trainSelect:disabled { opacity: 0.5; }

.train-ctrl .btn { padding: 8px 6px; font-size: 12px; }

.train-info {
  font-size: 12px;
  color: var(--muted);
  background: rgba(10, 15, 24, 0.5);
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 8px;
  line-height: 1.7;
  min-height: 20px;
}
.train-info b { color: var(--text); }
.train-info .st { color: var(--yellow); }
.train-info .spd { color: var(--green); }
.train-info .brk { color: var(--red); }
.train-info .stop-mk { color: var(--red); font-weight: 700; }

.stats { width: 100%; border-collapse: collapse; }
.stats td {
  padding: 6px 4px;
  font-size: 13px;
  border-bottom: 1px dashed var(--line);
}
.stats td:first-child { color: var(--muted); }
.stats td:last-child { text-align: right; font-family: "Consolas", monospace; font-weight: 600; }
.stats tr:last-child td { border-bottom: none; }

.log {
  list-style: none;
  max-height: 260px;
  overflow-y: auto;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}
.log li {
  padding: 3px 0;
  border-bottom: 1px dotted var(--line);
  display: flex;
  gap: 6px;
}
.log .ts { color: #5b6c82; flex-shrink: 0; }
.log .evt { color: var(--text); }
.log li.warn .evt { color: var(--yellow); }
.log li.bad .evt { color: var(--red); font-weight: 600; }
.log li.good .evt { color: var(--green); }
.log::-webkit-scrollbar { width: 6px; }
.log::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }

@media (max-width: 1100px) {
  .layout { flex-direction: column; }
  .panel { width: 100%; }
  .log { max-height: 160px; }
}