* { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Site header ──────────────────────────────────────────────────────────── */
.site-header {
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(16px, calc(50vw - 240px));
  height: 44px;
  border-bottom: 1px solid #e8e5df;
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header + .recent-banner { margin-bottom: 20px; }

.header-back {
  color: #999;
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.12s;
}
.header-back:hover { color: #555; }

.header-nick-link {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 0.82rem;
  color: #aaa;
  text-decoration: none;
  padding: 3px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.12s, border-color 0.12s;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.header-nick-link:hover { color: #666; border-bottom-color: #ddd; }

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: #333;
  color: #fff;
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 0.82rem;
  padding: 9px 18px;
  border-radius: 20px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 999;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
body { padding-top: 0; }
.site-header + h1 { margin-top: 20px; }

/* ── Shared puzzle layout ─────────────────────────────────────────────────── */
.puzzle-page {
  font-family: 'Noto Sans KR', sans-serif;
  background: #fff;
  color: #333;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 0 16px 60px;
  user-select: none;
  -webkit-user-select: none;
}

.puzzle-page.pad-48 { padding-bottom: 48px; }

.puzzle-page > h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #222;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.subtitle {
  font-size: 0.82rem;
  color: #888;
  margin-bottom: 0;
  text-align: center;
  line-height: 1.5;
}

.container {
  display: flex;
  flex-direction: column;
}

.container.align-center { align-items: center; }
.container.align-stretch { align-items: stretch; }
.container.puzzle-width-sm { width: min(94vw, 380px); }
.container.puzzle-width-md { width: min(94vw, 450px); }
.container.puzzle-width-lg { width: min(94vw, 500px); }

.recent-banner {
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 0 max(16px, calc(50vw - 240px));
  border-bottom: 1px solid #ece6dc;
  background: #faf8f4;
  overflow: hidden;
}

.recent-banner-track {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 100%;
  white-space: nowrap;
  will-change: transform;
}

.recent-banner.is-animated .recent-banner-track {
  width: max-content;
  min-width: auto;
  animation: recent-banner-scroll 20s linear infinite;
}

.recent-banner-text {
  display: inline-block;
  padding-right: 40px;
  font-size: 0.76rem;
  font-weight: 500;
  color: #7b7062;
  letter-spacing: 0.01em;
}

.recent-banner-label {
  color: #9a8e7c;
}

.recent-banner-strong {
  color: #5f5548;
  font-weight: 700;
}

@keyframes recent-banner-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - 20px)); }
}

.rules-toggle {
  font-size: 0.78rem;
  color: #999;
  cursor: pointer;
  border-bottom: 1px solid #ccc;
  padding-bottom: 1px;
  align-self: center;
  margin-top: 6px;
  margin-bottom: 8px;
}
.rules-toggle:hover { color: #555; }

.rules-box {
  display: none;
  background: #faf8f4;
  border: 1px solid #e0ddd6;
  border-radius: 3px;
  padding: 14px 18px;
  font-size: 0.82rem;
  color: #555;
  line-height: 1.8;
  width: 100%;
  margin-top: 8px;
  margin-bottom: 8px;
}
.rules-box.open { display: block; }
.rules-box strong { color: #333; font-size: 0.82rem; font-weight: 700; }

.bottom-buttons {
  display: flex;
  gap: 6px;
  width: 100%;
  margin-top: 6px;
  margin-bottom: 6px;
}
.bottom-buttons button {
  flex: 1;
  height: 40px;
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 13px;
  font-weight: 500;
  background: #faf8f4;
  border: 1.5px solid #d0ccc4;
  border-radius: 3px;
  color: #777;
  cursor: pointer;
  transition: background 0.12s;
}
.bottom-buttons button:hover { background: #f0ede7; }
.bottom-buttons button.danger { border-color: #e0bfbf; background: #fdf5f5; color: #b05050; }
.bottom-buttons button.danger:hover { background: #f8e8e8; }

.message {
  font-size: 0.95rem;
  font-weight: 700;
  color: #4a6fa5;
  margin-bottom: 8px;
  min-height: 1.4em;
  text-align: center;
}

.paint-grid-board {
  display: grid;
  border: 2.5px solid #222;
  width: var(--paint-board-width, min(94vw, 450px));
  aspect-ratio: var(--paint-board-aspect, 1);
  margin-top: 20px;
  margin-bottom: 12px;
}

.paint-grid-board > .cell,
.paint-grid-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--paint-cell-font, clamp(0.8rem, 4vw, 1.15rem));
  font-weight: 700;
  cursor: pointer;
  border-right: 1px solid #bbb;
  border-bottom: 1px solid #bbb;
  background: #fff;
  color: #333;
  transition: background 0.08s;
  min-height: 0;
}

.paint-grid-board > .cell.painted,
.paint-grid-cell.painted { background: #333; }
.paint-grid-board > .cell.preset,
.paint-grid-cell.preset { cursor: default; }
.paint-grid-board > .cell.err-painted,
.paint-grid-cell.err-painted { background: #8b1a1a; }
.paint-grid-board > .cell.err-white,
.paint-grid-board > .cell.err-clue,
.paint-grid-cell.err-white,
.paint-grid-cell.err-clue {
  background: #fde8e8;
  color: #b03030;
}
.paint-grid-board > .cell.err-white.preset,
.paint-grid-cell.err-white.preset { color: #b03030; }
.paint-grid-board > .cell.correct,
.paint-grid-cell.correct {
  background: #e8f5ec;
  color: #2d7a4a;
}
.paint-grid-board > .cell.correct.preset,
.paint-grid-cell.correct.preset { color: #2d7a4a; }

@media (max-width: 540px) {
  .puzzle-page { padding: 0 8px 48px; }
  .puzzle-page.pad-48 { padding-bottom: 40px; }
  .puzzle-page > h1 { font-size: 1.2rem; }
  .recent-banner {
    height: 28px;
    padding: 0 8px;
  }
  .recent-banner-text { font-size: 0.72rem; }
}

/* ── Leaderboard ──────────────────────────────────────────────────────────── */
.lb-section { width: 100%; margin-top: 28px; }
.lb-title { font-size: 0.88rem; font-weight: 700; color: #555; margin-bottom: 8px; }
.lb-list { border-top: 1px solid #e8e5df; }
.lb-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 4px;
  border-bottom: 1px solid #e8e5df;
  font-size: 0.88rem;
}
.lb-row.lb-me { background: #f5f8ff; font-weight: 600; }
.lb-rank { width: 24px; color: #aaa; font-size: 0.78rem; flex-shrink: 0; text-align: right; }
.lb-name { flex: 1; color: #333; }
.lb-time { color: #888; font-size: 0.82rem; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.lb-loading, .lb-empty { font-size: 0.82rem; color: #bbb; text-align: center; padding: 16px 0; }
.lb-ellipsis .lb-rank { color: #ccc; letter-spacing: 0.05em; }
.lb-ellipsis { border-bottom-style: dashed; }

/* ── Cloud sync buttons ───────────────────────────────────────────────────── */
.cloud-btns {
  width: 100%;
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
}
.cloud-btn {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 0.82rem;
  color: #999;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color 0.12s;
}
.cloud-btn:hover { color: #555; }

/* ── Completion check mark (index page) ───────────────────────────────────── */
.check-mark { color: #5a9a5a; font-size: 1rem; margin-left: 8px; flex-shrink: 0; }