:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --muted: #64748b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --text: #1e293b;
}

body {
  font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: var(--bg);
  color: var(--text);
  max-width: 1100px;
  margin: 24px auto;
  padding: 24px;
  line-height: 1.6;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 8px
}

h3 {
    font-weight: 600;
}

.gem-option {
  margin: 0 0 8px
}

.muted {
  color: var(--muted)
}

.controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
  align-items: center;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  margin-top: 16px;
}

.panel h3 {
  margin: 0;
  font-size: 1.1rem;
}

.panel h3 + * {
  margin-top: 16px;
}

.panel .row + .row {
  margin-top: 12px;
}

#gemsList {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px
}

.gemSet {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #fff, #fbfdff);
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 8px;
}

.gemSet .assigned-gems {
  display: flex;
  gap: 8px;
}

.gem {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #fff, #fbfdff)
}

.gem h3 {
  margin: 0 0 6px 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center
}

button {
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #f8fafc;
  font-weight: 600;
  transition: all 0.2s ease;
}

button:hover {
    background-color: #f1f5f9;
    border-color: #cbd5e1;
}

button.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

button.primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.small {
  padding: 6px 10px;
  font-size: .9rem
}

label {
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

input[type="radio"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-color: #fff;
  margin: 0;
  font: inherit;
  color: currentColor;
  width: 1.15em;
  height: 1.15em;
  border: 1px solid #d1d5db;
  border-radius: 50%;
  transform: translateY(-0.075em);
  display: grid;
  place-content: center;
  transition: all 0.1s ease-in-out;
}

input[type="radio"]::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  border-radius: 50%;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--primary);
}

input[type="radio"]:checked {
  border-color: var(--primary);
}

input[type="radio"]:checked::before {
  transform: scale(1);
}

form.addGem {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 12px;
  align-items: end
}

.hidden {
  display: none
}

.editable {
  border: 1px dashed #cbd5e1;
  padding: 6px;
  border-radius: 6px
}

input[type=file] {
  display: block
}

.controls .spacer {
  flex: 1
}

pre {
  white-space: pre-wrap;
  background: #0f172a;
  color: #e6eef8;
  padding: 12px;
  border-radius: 8px
}

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

.panel .row label:first-child {
  width: 100px;
  flex-shrink: 0;
  font-weight: 600;
}

.panel.solve .row button {
  margin-left: auto;
  padding: 10px 16px;
}