.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 16px;
  padding: 16px 24px 32px;
  max-width: 1500px;
  margin: 0 auto;
  align-items: start;
}
@media (max-width: 960px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    padding: 12px 16px 24px;
  }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

/* 容器 */
.tanks {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}
@media (max-width: 560px) {
  .tanks { grid-template-columns: minmax(0, 1fr); }
}
.tank {
  --tank-color: #1f7ad1;
  --tank-soft: #e3effb;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  border: 2px solid var(--tank-soft);
  border-radius: 12px;
  padding: 10px;
}
.tank.b {
  --tank-color: #23885b;
  --tank-soft: #dff2e8;
}
.tank-head { display: flex; align-items: center; gap: 8px; }
.badge {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--tank-color);
  color: #fff;
  font-weight: 700;
  flex: 0 0 auto;
}
.shape-select {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 0.95rem;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
}

.rate {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--tank-soft);
  border-radius: 10px;
  padding: 4px 8px;
  font-size: 0.9rem;
}
.rate-label { color: var(--ink-soft); }
.rate-value { min-width: 5.5em; text-align: center; }
.rate-num { font-size: 1.25rem; color: var(--tank-color); font-variant-numeric: tabular-nums; }
.rate-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
}
.rate-btn:disabled { opacity: 0.4; cursor: default; }

.canvas-wrap { position: relative; width: 100%; min-width: 0; }
.canvas-wrap canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.tank-wrap { aspect-ratio: 1 / 1; }
.full-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--tank-color);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 2px 10px;
}

.readouts { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.readout { background: var(--bg); border-radius: 10px; padding: 4px 10px; }
.readout.vol { background: var(--tank-soft); }
.readout-label { font-size: 0.75rem; color: var(--ink-soft); }
.readout-value {
  font-size: 1.4rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
}
.readout.vol .readout-value { color: var(--tank-color); }
.readout-value small { font-size: 0.8rem; font-weight: 400; margin-left: 3px; color: var(--ink-soft); }

/* 操作 */
.controls { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  cursor: pointer;
  font-size: 1rem;
}
.btn:hover { background: var(--bg); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  padding: 12px 28px;
  min-width: 150px;
  justify-content: center;
}
.btn.primary:hover { background: #1868b5; }
.btn.primary.pouring { background: #c2410c; border-color: #c2410c; }
.btn.primary:disabled { background: #9aa5b1; border-color: #9aa5b1; cursor: default; }
.clock { font-size: 0.95rem; color: var(--ink-soft); }
.clock b { font-size: 1.3rem; color: var(--ink); font-variant-numeric: tabular-nums; }
.speed {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin-left: auto;
}
.speed-label { padding: 0 10px; font-size: 0.85rem; color: var(--ink-soft); }
.speed button {
  border: 0;
  border-left: 1px solid var(--line);
  background: var(--panel);
  padding: 9px 12px;
  cursor: pointer;
  font-size: 0.92rem;
}
.speed button.active { background: var(--ink); color: #fff; font-weight: 700; }
.hint { margin: 0; font-size: 0.82rem; color: var(--ink-soft); }

/* グラフ */
.graph-block { display: flex; flex-direction: column; gap: 4px; }
.graph-title { font-size: 0.95rem; color: var(--ink-soft); }
.graph-title b { color: var(--ink); font-size: 1.05rem; }
.graph-wrap { aspect-ratio: 16 / 9; }
.legend { display: flex; gap: 18px; font-size: 0.85rem; color: var(--ink-soft); flex-wrap: wrap; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 22px; height: 0; border-top: 3px solid; }

@media (max-width: 520px) {
  .speed { margin-left: 0; }
}