:root {
  --board-size: min(80vw, 560px);
  --shell-radius: 22px;
  --marker-size: 34px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #ebedf1, #d8dde8);
  font-family: Arial, Helvetica, sans-serif;
  color: #111;
}

.app {
  background: #fff;
  border-radius: 24px;
  border: 2px solid #d0d0d0;
  padding: 1.3rem 1.4rem 1rem;
  box-shadow: 0 14px 40px rgba(0,0,0,0.18);
  width: min(95vw, 760px);
}

h1 {
  margin: 0 0 0.8rem;
  text-align: center;
  letter-spacing: 0.03em;
}

.meter-shell {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: center;
}

.y-axis,
.x-axis {
  font-weight: 700;
  text-align: center;
}

.y-axis {
  display: grid;
  justify-items: center;
  gap: 0.35rem;
  min-width: 78px;
}

.axis-arrow {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  line-height: 1;
}

.meter {
  position: relative;
  width: var(--board-size);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: 2fr 2fr 1fr 2fr;
  grid-template-rows: 2fr 1fr 2fr;
  border: 2px solid rgba(0,0,0,0.15);
  overflow: hidden;
}

.cell {
  display: grid;
  place-items: center;
  text-align: center;
  font-size: clamp(1.1rem, 4vw, 3rem);
  padding: 0.2rem;
}

.cell span { max-width: 100%; }

.c1 { grid-column: 1 / span 2; grid-row: 1; background: #934642; }
.c2 { grid-column: 3 / span 2; grid-row: 1; background: #f0d39d; }
.c3 { grid-column: 1 / span 3; grid-row: 2; background: #e9ad79; }
.c4 { grid-column: 1 / span 2; grid-row: 3; background: #afbedf; }
.c5 { grid-column: 3; grid-row: 3; background: #e7a56d; writing-mode: vertical-rl; text-orientation: mixed; }
.c6 { grid-column: 4; grid-row: 2 / span 2; background: #bfc1ab; }

.marker {
  --x: 72%;
  --y: 57%;
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--marker-size);
  height: var(--marker-size);
  border: 2px solid rgba(0,0,0,0.2);
  border-radius: 999px;
  background: #1f9dff;
  box-shadow: 0 5px 10px rgba(0,0,0,0.25);
  transform: translate(-50%, -50%);
  cursor: grab;
  touch-action: none;
}

.marker:active { cursor: grabbing; }

.x-axis {
  margin-top: 0.5rem;
  display: flex;
  justify-content: center;
  gap: 0.55rem;
}

.hint {
  margin: 0.85rem 0 0.2rem;
  text-align: center;
  color: #333;
}


.sync-status {
  margin: 0.15rem 0 0.45rem;
  text-align: center;
  font-size: 0.92rem;
  color: #444;
}

.reset {
  display: block;
  margin: 0 auto;
  padding: 0.5rem 0.95rem;
  border-radius: 10px;
  border: 1px solid #777;
  background: #f8f8f8;
  cursor: pointer;
}

.reset:hover { background: #efefef; }

.mover-field {
  margin: 0.25rem auto 0.7rem;
  max-width: 360px;
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
}

.mover-field input {
  padding: 0.45rem 0.6rem;
  border: 1px solid #999;
  border-radius: 8px;
  font: inherit;
}

.log {
  margin-top: 1rem;
  border-top: 1px solid #ddd;
  padding-top: 0.75rem;
}

.log h2 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

#move-log {
  margin: 0;
  padding-left: 1.2rem;
  max-height: 180px;
  overflow: auto;
}

#move-log li {
  margin-bottom: 0.4rem;
  line-height: 1.35;
  font-size: 0.95rem;
}