:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e8eef7;
  --muted: #8b9cb3;
  --accent: #5b9fd4;
  --accent-hover: #7ab3e0;
  --success: #3d9a6a;
  --danger: #c75c5c;
  --warn: #c9a227;
  --level1: #4a9eff;
  --level2: #9b7bff;
  --level3: #ff7b9b;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at top, #1a2838 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.banner {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.9rem;
}

.banner.warn {
  border-color: #6b5520;
  background: #2a2418;
  color: #e8d9a8;
}

.panel {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.level-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

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

.btn-level {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1.25rem 1rem;
  border: 2px solid transparent;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s, opacity 0.12s;
  color: #fff;
}

.btn-level:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-level:not(:disabled):hover {
  transform: translateY(-2px);
}

.btn-level .count {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.9;
}

.btn-level[data-level="1"] {
  background: linear-gradient(145deg, var(--level1), #2d6cb3);
}
.btn-level[data-level="2"] {
  background: linear-gradient(145deg, var(--level2), #5c3db8);
}
.btn-level[data-level="3"] {
  background: linear-gradient(145deg, var(--level3), #b83d6a);
}

.result {
  margin-top: 1rem;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a24;
}

.result.success {
  border-color: var(--success);
}
.result.error {
  border-color: var(--danger);
}

.result .word-display {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.session-ui {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.session-ui.active #session-note {
  color: var(--text);
}

.timer-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  flex: 1 1 16rem;
}

.word-pools {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 800px) {
  .word-pools {
    grid-template-columns: 1fr;
  }
}

.pool label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.pool textarea {
  width: 100%;
  min-height: 140px;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a24;
  color: var(--text);
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  resize: vertical;
}

.actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

button.secondary {
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #243044;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
}

button.secondary:hover:not(:disabled) {
  background: #2d3d56;
}

button.secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.danger {
  border-color: #6b3030;
  background: #3a2020;
}

button.danger:hover:not(:disabled) {
  background: #4a2828;
}

.add-team {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.add-team input,
.points-input {
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a24;
  color: var(--text);
  font: inherit;
}

.add-team input {
  flex: 1 1 12rem;
}

.team-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.team-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
}

.team-name-input,
.team-score-input {
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a24;
  color: var(--text);
  font: inherit;
}

.team-name-input {
  flex: 1 1 8rem;
  min-width: 8rem;
  font-weight: 700;
}

.team-score-input {
  width: 4.5rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  -moz-appearance: textfield;
}

.team-score-input::-webkit-outer-spin-button,
.team-score-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.points-input {
  width: 4.5rem;
}

.return-level {
  width: auto;
}

.board-preview {
  margin: 0.75rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #070b10;
  color: #f2f6fb;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.35;
  letter-spacing: 0.04em;
  white-space: pre;
  overflow-x: auto;
}

.history {
  list-style: none;
  margin: 0;
  padding: 0;
}

.history li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.history li:last-child {
  border-bottom: none;
}

.history .meta {
  color: var(--muted);
  font-size: 0.8rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}