*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #111827;
  color: #e5e7eb;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button,
.file-button {
  border: 1px solid #4b5563;
  background: #1f2937;
  color: #f9fafb;
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button.primary {
  background: #2563eb;
  border-color: #60a5fa;
}

.file-button input {
  display: none;
}

.topbar {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid #374151;
  background: #0f172a;
}

.title-block {
  display: grid;
  gap: 2px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.1rem;
  color: #f9fafb;
}

.credit {
  margin: 0;
  color: #9ca3af;
  font-size: 0.72rem;
  line-height: 1.2;
}

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.status {
  justify-self: end;
  min-height: 1.2em;
  color: #9ca3af;
  font-size: 0.85rem;
}

.status.error {
  color: #fca5a5;
}

.layout {
  display: grid;
  grid-template-columns: minmax(260px, 32vw) minmax(520px, 1fr) 380px;
  gap: 14px;
  padding: 14px;
}

.image-pane,
.work-pane,
.result-pane,
.player {
  border: 1px solid #374151;
  background: #182235;
  border-radius: 8px;
}

.image-pane {
  min-height: 300px;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10px;
}

#preview-image {
  max-width: 100%;
  height: auto;
  display: none;
}

.work-pane {
  padding: 12px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.palette {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.palette button {
  width: 34px;
  height: 34px;
  padding: 0;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.palette button.active {
  outline: 2px solid #facc15;
  outline-offset: 2px;
}

.options {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  color: #cbd5e1;
  font-size: 0.85rem;
}

.options input[type="number"] {
  width: 76px;
}

input,
select {
  background: #111827;
  border: 1px solid #4b5563;
  color: #f9fafb;
  border-radius: 5px;
  padding: 4px 6px;
}

.players {
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: 12px;
}

.player {
  padding: 10px;
}

.player h2,
.result-pane h2,
.result-pane h3 {
  margin: 0 0 10px;
  color: #f9fafb;
}

.player h2 {
  font-size: 1rem;
}

.meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
  font-size: 0.8rem;
  color: #cbd5e1;
}

.pair-editor {
  display: inline-flex;
  gap: 4px;
  margin-left: 4px;
}

.pair-editor select {
  width: 46px;
}

.garbage-input {
  width: 82px;
  margin-left: 4px;
}

.board {
  display: grid;
  grid-template-columns: repeat(6, 34px);
  grid-template-rows: repeat(13, 34px);
  gap: 3px;
  justify-content: center;
  padding: 8px;
  background: #0b1020;
  border: 1px solid #334155;
  border-radius: 6px;
}

.cell,
.palette button {
  border-radius: 50%;
  border: 1px solid #334155;
  background: #26324a;
  color: #f8fafc;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
}

.cell {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-weight: 800;
  cursor: pointer;
}

.cell.hidden-row {
  opacity: 0.42;
}

.color-empty {
  background: #26324a;
  color: transparent;
}

.color-R { background: radial-gradient(circle at 35% 35%, #ff7272, #b91c1c); }
.color-Y { background: radial-gradient(circle at 35% 35%, #fde047, #d97706); color: #111827; text-shadow: none; }
.color-G { background: radial-gradient(circle at 35% 35%, #86efac, #16a34a); }
.color-B { background: radial-gradient(circle at 35% 35%, #93c5fd, #2563eb); }
.color-P { background: radial-gradient(circle at 35% 35%, #c084fc, #7e22ce); }
.color-garbage { background: radial-gradient(circle at 35% 35%, #f1f5f9, #64748b); color: #111827; text-shadow: none; }

.result-pane {
  padding: 12px;
  overflow: auto;
  max-height: calc(100vh - 92px);
}

.eval-summary {
  padding: 10px;
  margin-bottom: 12px;
  border: 1px solid #334155;
  border-radius: 6px;
  background: #111827;
  font-weight: 700;
}

.muted {
  color: #9ca3af;
  font-weight: 500;
}

.candidates {
  margin: 0 0 14px;
  padding-left: 24px;
}

.candidates li {
  margin-bottom: 6px;
  color: #dbeafe;
}

.strategy-list {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 0.78rem;
}

.strategy-heading {
  margin-top: 7px;
  color: #f8fafc;
  font-weight: 800;
  letter-spacing: 0;
}

.strategy-heading:first-child {
  margin-top: 0;
}

.strategy-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  padding: 7px 8px;
  border: 1px solid #334155;
  border-radius: 6px;
  background: #0f172a;
}

.strategy-row span {
  color: #a7f3d0;
}

.strategy-row strong {
  color: #e5e7eb;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.strategy-row.important {
  border-color: #facc15;
}

.messages {
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 80px;
  margin: 0;
  padding: 8px;
  background: #0b1020;
  border: 1px solid #334155;
  border-radius: 6px;
  color: #cbd5e1;
  font-size: 0.78rem;
}

@media (max-width: 1120px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .result-pane {
    max-height: none;
  }
}

@media (max-width: 640px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .status {
    justify-self: start;
  }

  .players {
    grid-template-columns: 1fr;
  }

  .toolbar {
    flex-direction: column;
  }
}