:root {
  color-scheme: dark;
  --bg-top: #17122c;
  --bg-bottom: #05070d;
  --panel: rgba(17, 20, 37, 0.88);
  --panel-strong: rgba(28, 34, 62, 0.96);
  --line: rgba(255, 255, 255, 0.12);
  --text: #f7f7fb;
  --muted: #b2b4cd;
  --accent: #ff7f50;
  --accent-2: #ffd166;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(115, 72, 255, 0.18), transparent 35%),
    radial-gradient(circle at 20% 80%, rgba(255, 127, 80, 0.22), transparent 26%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent);
}

.shell {
  width: min(980px, calc(100% - 24px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.hero,
.stats,
.panel,
.board-wrap,
.legend,
.actions,
.support-strip,
.result {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
}

.eyebrow,
.label,
.result-label {
  margin: 0 0 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
  font-size: 0.78rem;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 0.95;
}

.subtitle {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
  line-height: 1.6;
}

.hub-link,
.support-strip a {
  color: var(--text);
  text-decoration: none;
}

.hub-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  padding: 12px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #ffb347);
  color: #120c18;
  font-weight: 800;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 16px;
  margin-top: 16px;
}

.stats div {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.stats span {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.stats strong {
  font-size: 1.5rem;
}

.panel,
.board-wrap,
.legend,
.result {
  margin-top: 16px;
}

.panel {
  padding: 18px;
}

.message {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.5;
}

.goal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.goal-card {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.goal-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.goal-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.board-wrap {
  padding: 20px 12px;
  overflow-x: auto;
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(68px, 92px));
  justify-content: center;
  gap: 18px 14px;
  min-width: 320px;
}

.tube {
  position: relative;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  color: inherit;
  touch-action: manipulation;
}

.tube:disabled {
  cursor: default;
}

.tube-shell {
  height: 220px;
  border-radius: 28px 28px 24px 24px;
  border: 3px solid rgba(255, 255, 255, 0.16);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.03));
  padding: 16px 12px 12px;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  box-shadow: inset 0 -12px 28px rgba(0, 0, 0, 0.24);
  transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.tube-label {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
}

.tube:hover .tube-shell,
.tube.selected .tube-shell {
  transform: translateY(-4px);
  border-color: rgba(255, 209, 102, 0.82);
  box-shadow: 0 12px 22px rgba(0, 0, 0, 0.24), inset 0 -12px 28px rgba(0, 0, 0, 0.24);
}

.tube:focus-visible .tube-shell {
  outline: 3px solid rgba(255, 209, 102, 0.9);
  outline-offset: 3px;
}

.tube.pour-target .tube-shell {
  border-color: rgba(122, 229, 130, 0.72);
}

.segment {
  position: relative;
  height: 42px;
  border-radius: 12px;
  box-shadow: inset 0 7px 12px rgba(255, 255, 255, 0.18), inset 0 -8px 10px rgba(0, 0, 0, 0.16);
}

.segment::after {
  content: "";
  position: absolute;
  inset: 8px 10px auto;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
}

.segment.empty {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.legend {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.86rem;
}

.legend-chip {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
}

.actions {
  margin-top: 16px;
  padding: 14px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

button {
  border: 0;
  border-radius: 16px;
  min-height: 52px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}

.primary {
  background: linear-gradient(135deg, var(--accent), #ffb347);
  color: #140d18;
}

.ghost {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
}

.ghost:disabled {
  cursor: default;
  opacity: 0.45;
}

.support-strip {
  margin-top: 16px;
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
}

.result {
  padding: 20px;
  text-align: center;
}

.result strong {
  display: block;
  font-size: clamp(2rem, 7vw, 3rem);
  margin-bottom: 10px;
}

.result p {
  margin: 0 0 16px;
  color: var(--muted);
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 16px, 640px);
    padding-top: 16px;
  }

  .hero {
    flex-direction: column;
  }

  .stats,
  .actions,
  .legend,
  .goal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .board {
    grid-template-columns: repeat(3, minmax(82px, 1fr));
  }

  .tube-shell {
    height: 196px;
  }

  .support-strip {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .board {
    grid-template-columns: repeat(2, minmax(84px, 1fr));
    gap: 16px 12px;
  }

  .tube-shell {
    height: 184px;
    padding: 12px 10px 10px;
  }

  .segment {
    height: 36px;
  }

  .legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}