:root {
  --ink: #1f1a14;
  --paper: #f8f2e6;
  --paper-strong: #f1e7d7;
  --wood-light: #e8d3b0;
  --wood-dark: #b58863;
  --wood-border: #6c4b2b;
  --accent: #7a4e20;
  --accent-2: #385940;
  --danger: #8f2e2e;
  --shadow: 0 12px 30px rgba(31, 26, 20, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Georgia", "Times New Roman", serif;
  color: var(--ink);
  background: linear-gradient(135deg, #d8c4a6 0%, #f0e2cb 40%, #d8c8b1 100%);
}

.background-shape {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.35), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(122, 78, 32, 0.16), transparent 45%);
}

.page {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 18px 40px;
}

.app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.nav-brand {
  color: var(--ink);
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink);
  border: 1px solid rgba(108, 75, 43, 0.22);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 600;
}

.nav-links a.active {
  background: linear-gradient(180deg, #9a6a3a, #7a4e20);
  color: #fff8ec;
  border-color: transparent;
}

.single-column {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.page-copy {
  margin: 0 0 10px;
}

.compact-auth .small-note {
  margin: 6px 0 0;
  font-size: 0.92rem;
}

.small-note {
  margin: 8px 0 4px;
  font-size: 0.92rem;
  opacity: 0.88;
}

.leaderboard-page-card {
  margin-top: 0;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 18px;
}

.page-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  letter-spacing: 0.5px;
}

.page-header p {
  margin: 6px 0 0;
  font-size: 1rem;
}

.score-rules {
  display: flex;
  gap: 10px;
  font-weight: 600;
}

.score-rules span {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(31, 26, 20, 0.1);
  padding: 8px 12px;
  border-radius: 999px;
}

.layout-grid {
  display: grid;
  grid-template-columns: 280px minmax(360px, 1fr) 300px;
  gap: 14px;
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.63));
  border: 1px solid rgba(108, 75, 43, 0.25);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 14px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.auth-state {
  margin-bottom: 12px;
  padding: 10px;
  border-radius: 8px;
  background: var(--paper-strong);
  border: 1px solid rgba(108, 75, 43, 0.2);
}

.auth-forms {
  display: grid;
  gap: 12px;
}

.form-block {
  padding: 10px;
  border: 1px solid rgba(108, 75, 43, 0.2);
  border-radius: 10px;
  background: rgba(248, 242, 230, 0.8);
}

input,
select,
button {
  width: 100%;
  margin-top: 7px;
  margin-bottom: 6px;
  border-radius: 8px;
  border: 1px solid rgba(108, 75, 43, 0.35);
  padding: 9px 10px;
  font: inherit;
  color: var(--ink);
}

input,
select {
  background: #fffdf7;
}

button {
  cursor: pointer;
  background: linear-gradient(180deg, #9a6a3a, #7a4e20);
  color: #fff8ec;
  border: none;
  font-weight: 600;
}

button:hover {
  filter: brightness(1.04);
}

button.secondary {
  background: linear-gradient(180deg, #5f6d5d, #385940);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.hidden {
  display: none;
}

.board-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.board {
  width: min(72vw, 580px);
  max-width: 580px;
  border: 8px solid var(--wood-border);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 180ms ease;
}

.board-meta {
  width: 100%;
  padding: 4px 4px 8px;
}

.status {
  margin: 0;
  border-radius: 8px;
  padding: 10px 12px;
  border: 1px solid transparent;
}

.status.info {
  background: rgba(255, 255, 255, 0.65);
  border-color: rgba(108, 75, 43, 0.2);
}

.status.success {
  background: #2c9f47;
  color: #f5fff7;
  border-color: #1d6f31;
  font-weight: 700;
}

.status.error {
  background: #7a1010;
  color: #fff4f4;
  border-color: #4f0a0a;
}

.next-move {
  margin: 9px 2px 0;
}

.review-controls {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 52px 52px 1fr 52px 52px;
  gap: 8px;
  align-items: center;
}

.review-btn {
  margin: 0;
  padding: 6px 0;
}

.review-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.review-label {
  text-align: center;
  font-weight: 700;
  border: 1px solid rgba(108, 75, 43, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.65);
  padding: 7px 10px;
}

.board-tools {
  margin-top: 8px;
}

.board-tools button {
  max-width: 160px;
  margin: 0;
}

.keyboard-help {
  margin: 8px 2px 0;
  font-size: 0.9rem;
  opacity: 0.85;
}

.board.board-flash-success {
  animation: boardPulseSuccess 420ms ease;
}

.board.board-flash-error {
  animation: boardPulseError 420ms ease;
}

@keyframes boardPulseSuccess {
  0% {
    box-shadow: 0 0 0 rgba(44, 159, 71, 0);
  }
  50% {
    box-shadow: 0 0 0 11px rgba(44, 159, 71, 0.45);
  }
  100% {
    box-shadow: 0 0 0 rgba(44, 159, 71, 0);
  }
}

@keyframes boardPulseError {
  0% {
    box-shadow: 0 0 0 rgba(143, 46, 46, 0);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(143, 46, 46, 0.38);
  }
  100% {
    box-shadow: 0 0 0 rgba(143, 46, 46, 0);
  }
}

.setup-card label {
  display: block;
  margin-top: 6px;
  font-weight: 600;
}

.leaderboard-card {
  margin-top: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid rgba(108, 75, 43, 0.22);
}

tbody tr.current-user {
  background: rgba(122, 78, 32, 0.15);
  font-weight: 700;
}

.white-1e1d7 {
  background-color: var(--wood-light);
}

.black-3c85d {
  background-color: var(--wood-dark);
}

@media (max-width: 1080px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .board {
    width: min(92vw, 560px);
  }

  .page-header {
    align-items: start;
    flex-direction: column;
  }

  .app-nav {
    align-items: start;
    flex-direction: column;
  }
}