:root {
  --bg-color: #f0f0f0;
  --text-color: #111;
  --border-color: #ccc;
  --strong-border-color: #333;
  --item-bg-color: #ccc;
  --button-bg-color: #efefef;
  --button-border-color: #767676;
  --selected-outline-color: black;
  
  /* Responsive sizing */
  --cell-size: 40px;
  --palette-size: 50px;
  --icon-btn-size: 52px;
}

/* Desktop scaling */
@media (min-width: 1024px) {
  :root {
    --cell-size: 45px;
    --palette-size: 55px;
    --icon-btn-size: 55px;
  }
}

@media (min-width: 1440px) {
  :root {
    --cell-size: 48px;
    --palette-size: 58px;
    --icon-btn-size: 58px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #f0f0f0;
    --border-color: #444;
    --strong-border-color: #666;
    --item-bg-color: #333;
    --button-bg-color: #2a2a2a;
    --button-border-color: #888;
    --selected-outline-color: #0099ff;
  }
}

/* Base styles */
html, body { 
  height: 100%; 
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 10px;
  padding-top: 52px;
  box-sizing: border-box;
}

/* header and main share the same column width so the back button sits at the same
   left edge as all other content (body uses align-items:center, so without an
   explicit width the header shrinks to its content and the button drifts) */
header {
  width: 100%;
  max-width: 660px;
  box-sizing: border-box;
}

/* main needs to stretch so home panel can be wider than the board */
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 660px; /* slightly wider than board to allow home panel breathing room */
  box-sizing: border-box;
}

h1 { 
  margin: 10px 0 5px; 
  font-size: 24px; 
  font-weight: 600;
  text-align: center;
}

@media (min-width: 1024px) {
  h1 { 
    font-size: 28px; 
    margin: 8px 0 5px; 
  }
  body { 
    padding: 10px 5px; 
  }
}

/* Palette styles */
#palette {
  display: flex; 
  gap: 10px; 
  margin: 8px; 
  flex-wrap: wrap; 
  justify-content: center;
}

@media (min-width: 1024px) {
  #palette { 
    gap: 12px; 
    margin: 10px; 
  }
}

.palette-item {
  width: var(--palette-size); 
  height: var(--palette-size); 
  background: var(--item-bg-color); 
  display: flex; 
  justify-content: center; 
  align-items: center; 
  cursor: pointer; 
  font-size: 26px; 
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

@media (min-width: 1024px) {
  .palette-item { 
    font-size: 28px; 
  }
}

.palette-item:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.palette-item.selected { 
  outline: 3px solid var(--selected-outline-color);
  transform: scale(1.1);
}

/* Board styles */
#board {
  display: grid; 
  grid-template-columns: repeat(10, var(--cell-size)); 
  grid-template-rows: repeat(15, var(--cell-size));
  border: 3px solid var(--strong-border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.cell { 
  border: 1px solid var(--border-color); 
  width: var(--cell-size); 
  height: var(--cell-size); 
  position: relative;
  transition: background-color 0.2s ease;
}

.cell:hover {
  background-color: rgba(33, 150, 243, 0.1);
}

/* Component styles */
.component { 
  width: 100%; 
  height: 100%; 
  display: flex; 
  justify-content: center; 
  align-items: center; 
  font-size: calc(var(--cell-size) * 0.6);
}

.target { 
  font-weight: 700; 
  font-size: calc(var(--cell-size) * 0.5);
}

.target.red { color: red; } 
.target.blue { color: blue; } 
.target.green { color: green; }

/* Ball styles */
.ball { 
  width: 60%; 
  height: 60%; 
  border-radius: 50%; 
  position: absolute; 
  top: 20%; 
  left: 20%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.red { background: red; } 
.blue { background: blue; } 
.green { background: green; }

/* Game state styles */
body.running #board {
  pointer-events: none;
}

body.running .palette-item {
  opacity: .5;
  pointer-events: none;
}

/* New Puzzle and Share are cosmetically dimmed during play;
   Start Over and Clear Grid remain fully active (including during daily). */
body.running #newPuzzleBtn,
body.running #shareBtn {
  opacity: .45;
  pointer-events: none;
}

body.running .cell { 
  cursor: not-allowed; 
}

/* Pause button flashing animation */
#startBtn.flashing {
  animation: pauseFlash 1s ease-in-out infinite !important;
}

@keyframes pauseFlash {
  0% { background-color: #00c853 !important; }
  50% { background-color: #f44336 !important; }
  100% { background-color: #00c853 !important; }
}

/* Game paused state styles */
body.paused #board { 
  pointer-events: none; 
}

body.paused .palette-item { 
  opacity: .3; 
  pointer-events: none; 
}

body.paused .cell { 
  cursor: not-allowed; 
}

/* Override running state when paused */
body.running.paused #board { 
  pointer-events: none; 
}

body.running.paused .palette-item { 
  opacity: .3; 
  pointer-events: none; 
}

body.running.paused .cell { 
  cursor: not-allowed; 
}

/* Control styles */
#controls { 
  margin: 15px 0 10px; 
  display: flex; 
  gap: 12px; 
  flex-wrap: wrap; 
  justify-content: center; 
}

@media (min-width: 1024px) {
  #controls { 
    gap: 15px; 
    margin: 18px 0 10px; 
  }
}

.icon-btn { 
  display: inline-flex; 
  align-items: center; 
  justify-content: center; 
  width: var(--icon-btn-size); 
  height: var(--icon-btn-size); 
  padding: 0; 
  border-radius: 12px; 
  border: none; 
  color: #fff; 
  cursor: pointer; 
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.icon-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.35);
}

.icon-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: 0 2px 8px rgba(0,0,0,.15) !important;
}

/* Clear Grid button colour */
#clearGridBtn { background: #757575; }

/* ─── Daily mode header ──────────────────────────────────── */
.daily-mode-header {
  padding: 4px 0 6px;
}

/* Title row: back | timer | give-up  (3-column flex) */
.daily-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 36px;
}

/* Back chevron button */
.daily-back-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--button-border-color, rgba(128,128,128,.4));
  border-radius: 8px;
  background: none;
  cursor: pointer;
  color: var(--text-color);
  transition: background .15s;
}
.daily-back-btn svg {
  width: 18px;
  height: 18px;
  display: block;
  overflow: visible;
}
.daily-back-btn:hover  { background: rgba(128,128,128,.15); }
.daily-back-btn:active { background: rgba(128,128,128,.25); }

/* ─── Daily display timer (hero element — always visible, replaces title) ─── */
#daily-timer {
  flex: 1;
  font-family: 'Courier New', Courier, monospace;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-color);
  text-align: center;
  padding: 2px 0;
  min-width: 90px;
  line-height: 1;
}

/* ─── Daily give-up button ───────────────────────────────────── */
.daily-give-up-btn {
  flex-shrink: 0;
  padding: 6px 10px;
  background: #c62828;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, transform .1s;
}

.daily-give-up-btn:hover  { background: #b71c1c; transform: translateY(-1px); }
.daily-give-up-btn:active { background: #7f0000; transform: translateY(0); }

/* ─── Landing page leaderboard date nav ─────────────────── */
.home-lb-date-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 4px 0 8px;
}

.home-lb-date-label {
  font-size: 14px;
  font-weight: 600;
  min-width: 110px;
  text-align: center;
  opacity: .85;
}

.daily-nav-btn {
  background: none;
  border: 1px solid rgba(128,128,128,.35);
  color: var(--text-color);
  border-radius: 6px;
  padding: 4px 11px;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: opacity .15s;
}

.daily-nav-btn:hover:not(:disabled) { opacity: .7; }
.daily-nav-btn:disabled { opacity: .25; cursor: default; }

/* ─── Pre-play board blur (daily mode, before Play is pressed) ─
   Only the board is blurred — all controls remain fully interactive
   so the player can place pieces before pressing Play. */
body.daily-preplay #board {
  filter: blur(10px);
  pointer-events: none;
  user-select: none;
}

.icon-btn:active {
  transform: translateY(0);
}

.icon-btn svg { 
  width: calc(var(--icon-btn-size) * 0.5); 
  height: calc(var(--icon-btn-size) * 0.5); 
  fill: currentColor; 
}

#shareBtn svg { 
  width: calc(var(--icon-btn-size) * 0.54); 
  height: calc(var(--icon-btn-size) * 0.54); 
}

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

/* Button colors */
#startBtn { background: #00c853; }
#startOverBtn { background: #ff9800; }
#newPuzzleBtn { background: #2196f3; }
#shareBtn { background: #9c27b0; }

/* Animations */
.flipbit { 
  animation: flipbit .3s ease-in-out; 
}

.wobble { 
  animation: wobble .3s ease-in-out; 
}

.switch { 
  color: #004488; 
}

.passthrough { 
  color: #666666; 
}

@keyframes flipbit { 
  0% { transform: rotate(0); }
  50% { transform: rotate(90deg); }
  100% { transform: rotate(0); }
}

@keyframes wobble { 
  0% { transform: rotate(0); }
  25% { transform: rotate(5deg); }
  75% { transform: rotate(-5deg); }
  100% { transform: rotate(0); }
}

/* Overlay styles */
#fullscreenPrompt, 
#gameOverOverlay, 
#victoryOverlay { 
  position: fixed; 
  inset: 0; 
  z-index: 10000; 
  display: none; 
}

#fullscreenPrompt { 
  background: #000; 
  color: #fff; 
  display: none; 
  align-items: center; 
  justify-content: center; 
  flex-direction: column; 
  font-size: 24px; 
  gap: 12px; 
}

#gameOverOverlay, 
#victoryOverlay { 
  background: rgba(0,0,0,.8); 
  color: #fff; 
  display: none; 
  align-items: center; 
  justify-content: center; 
  flex-direction: column; 
  font-size: 24px; 
  gap: 20px; 
}

/* Tutorial overlay styles */
#tutorialOverlay,
#newGameOverlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10001;
  padding: 20px;
  box-sizing: border-box;
}

#tutorialBox,
#newGameBox {
  background: var(--bg-color);
  color: var(--text-color);
  border-radius: 16px;
  padding: 24px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  border: 2px solid var(--border-color);
  text-align: center;
  position: relative;
}

#tutorialIcon,
#newGameIcon {
  font-size: 48px;
  margin-bottom: 16px;
}

#tutorialTitle,
#newGameTitle {
  margin: 0 0 12px 0;
  font-size: 20px;
  color: var(--text-color);
  font-weight: 600;
}

#tutorialMessage,
#newGameMessage {
  margin: 0 0 20px 0;
  line-height: 1.5;
  color: var(--text-color);
  font-size: 16px;
}

#tutorialGotIt {
  background: #4CAF50 !important;
  margin: 0 auto;
  width: auto;
  height: auto;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

#tutorialGotIt:hover {
  background: #45a049 !important;
  transform: translateY(-1px);
}

#tutorialGotIt:active {
  transform: translateY(0);
}

/* New Game confirmation buttons */
#newGameButtons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

#newGameConfirm,
#newGameCancel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: auto;
  height: auto;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

#newGameConfirm {
  background: #4CAF50 !important;
}

#newGameConfirm:hover {
  background: #45a049 !important;
  transform: translateY(-1px);
}

#newGameCancel {
  background: #f44336 !important;
}

#newGameCancel:hover {
  background: #da190b !important;
  transform: translateY(-1px);
}

#newGameConfirm:active,
#newGameCancel:active {
  transform: translateY(0);
}

/* Responsive tutorial and new game styles */
@media (max-width: 480px) {
  #tutorialBox,
  #newGameBox {
    padding: 20px;
    margin: 10px;
  }
  
  #tutorialIcon,
  #newGameIcon {
    font-size: 40px;
    margin-bottom: 12px;
  }
  
  #tutorialTitle,
  #newGameTitle {
    font-size: 18px;
  }
  
  #tutorialMessage,
  #newGameMessage {
    font-size: 14px;
  }
  
  #newGameButtons {
    flex-direction: column;
    gap: 12px;
  }
  
  #newGameConfirm,
  #newGameCancel {
    width: 100%;
  }
}

/* ─── Mode tabs ─────────────────────────────────────────── */
#mode-tabs {
  display: flex;
  gap: 4px;
  margin: 8px auto 0;
  background: var(--item-bg-color);
  border-radius: 10px;
  padding: 4px;
  max-width: calc(var(--cell-size) * 10 + 2px);
}

#mode-tabs button {
  flex: 1;
  padding: 7px 10px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s;
  white-space: nowrap;
}

#mode-tabs button.active {
  background: var(--bg-color);
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
  font-weight: 700;
}

/* ─── Mode panels ───────────────────────────────────────── */
.mode-panel {
  max-width: calc(var(--cell-size) * 10 + 2px);
  margin: 6px auto 0;
  width: 100%;
}

/* !important beats the #home-panel { display:flex } ID-selector rule */
.mode-panel.hidden { display: none !important; }

/* ─── Daily calendar ────────────────────────────────────── */
#daily-calendar {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  padding: 4px 0 6px;
  scrollbar-width: thin;
}

.day-chip {
  min-width: 34px;
  height: 34px;
  border: 2px solid var(--border-color);
  border-radius: 7px;
  background: var(--button-bg-color);
  color: var(--text-color);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  transition: background 0.12s;
}

.day-chip.solved {
  background: #00c853;
  color: #fff;
  border-color: #00c853;
}

.day-chip.today {
  border-color: #2196f3;
  font-weight: 700;
}

/* ─── Challenge banner ──────────────────────────────────── */
#challenge-banner {
  background: #7b1fa2;
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 6px;
}

/* ─── Community grid ────────────────────────────────────── */
#community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px;
}

.puzzle-card {
  background: var(--item-bg-color);
  border: 2px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
  text-align: left;
}

.puzzle-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.18);
}

.puzzle-card-title  { font-weight: 700; font-size: 14px; margin-bottom: 3px; }
.puzzle-card-meta   { font-size: 11px; color: var(--button-border-color); }
.puzzle-card-stars  { color: #f9a825; font-size: 13px; margin-top: 5px; }
.puzzle-card-plays  { font-size: 11px; color: var(--button-border-color); }

/* ─── Sort / action buttons ─────────────────────────────── */
.sort-btn {
  padding: 6px 13px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--button-bg-color);
  color: var(--text-color);
  cursor: pointer;
  font-size: 13px;
  transition: background 0.12s;
}

.sort-btn.active {
  background: #2196f3;
  color: #fff;
  border-color: #2196f3;
}

.sort-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

/* ─── Leaderboard table ─────────────────────────────────── */
.lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 10px;
}

.lb-table th,
.lb-table td {
  padding: 7px 9px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.lb-table th {
  font-weight: 700;
  color: var(--button-border-color);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .4px;
}

.lb-table th.sortable { cursor: pointer; }
.lb-table th.sortable:hover { color: #2196f3; }
.lb-table th.active-sort { color: #2196f3; }
.lb-highlight { background: rgba(0,200,83,.12); font-weight: 700; }

/* ─── Creator validate status ────────────────────────────── */
#creator-validate-status {
  font-size: 12px;
  color: var(--text-color);
  min-height: 18px;
}

/* ─── Initials input overlay ─────────────────────────────── */
#initials-overlay {
  position: fixed;
  inset: 0;
  z-index: 10002;
  background: rgba(0,0,0,.7);
  display: none;
  align-items: center;
  justify-content: center;
}

#initials-box {
  background: var(--bg-color);
  color: var(--text-color);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 28px 24px;
  max-width: 340px;
  width: 90%;
  text-align: center;
}

#initials-box h3 { margin: 0 0 16px; font-size: 20px; }

#initials-input {
  width: 108px;
  padding: 8px;
  border: 3px solid var(--border-color);
  border-radius: 8px;
  background: var(--button-bg-color);
  color: var(--text-color);
  font-size: 30px;
  text-align: center;
  letter-spacing: 8px;
  text-transform: uppercase;
  font-weight: 700;
}

#initials-input:focus { border-color: #2196f3; outline: none; }
#initials-error { color: #f44336; font-size: 12px; min-height: 16px; margin: 4px 0; }

/* ─── Victory leaderboard overlay ───────────────────────── */
#victoryLeaderboardOverlay {
  position: fixed;
  inset: 0;
  z-index: 10002;
  background: rgba(0,0,0,.85);
  display: none;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  padding: 20px 10px;
}

#victoryLeaderboardBox {
  background: var(--bg-color);
  color: var(--text-color);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  max-width: 460px;
  width: 100%;
}

#victoryLeaderboardBox h2 { margin: 0 0 8px; font-size: 26px; }
#victory-score-display { font-size: 14px; margin-bottom: 4px; color: var(--button-border-color); }
#victory-rank-badge {
  display: inline-block;
  background: #2196f3;
  color: #fff;
  border-radius: 20px;
  padding: 4px 14px;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
}

/* ─── Loading overlay ────────────────────────────────────── */
#loadingOverlay {
  position: fixed;
  inset: 0;
  z-index: 10003;
  background: rgba(0,0,0,.6);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  color: #fff;
  font-size: 16px;
}

.spinner {
  width: 38px;
  height: 38px;
  border: 4px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Creator submit overlay ─────────────────────────────── */
#creatorSubmitOverlay {
  position: fixed;
  inset: 0;
  z-index: 10002;
  background: rgba(0,0,0,.7);
  display: none;
  align-items: center;
  justify-content: center;
}

#creatorSubmitBox {
  background: var(--bg-color);
  color: var(--text-color);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  max-width: 380px;
  width: 90%;
}

#creatorSubmitBox h3 { margin: 0 0 16px; }
#creatorSubmitBox label { display: block; font-size: 13px; margin-bottom: 4px; }
#creatorSubmitBox input,
#creatorSubmitBox textarea {
  width: 100%;
  padding: 7px 9px;
  border: 2px solid var(--border-color);
  border-radius: 7px;
  background: var(--button-bg-color);
  color: var(--text-color);
  font-size: 13px;
  box-sizing: border-box;
  margin-bottom: 10px;
}
#creatorSubmitBox textarea { resize: vertical; min-height: 60px; }
#creator-form-error { color: #f44336; font-size: 12px; min-height: 16px; }

/* ─── Responsive adjustments for new elements ───────────── */
@media (max-width: 480px) {
  #mode-tabs button { font-size: 11px; padding: 6px 6px; }
  #community-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .puzzle-card { padding: 9px; }
  #victoryLeaderboardBox { padding: 16px; }
}

/* ═══════════════════════════════════════════════════════════
   GAME AREA WRAPPER
   ═══════════════════════════════════════════════════════════ */
.game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.game-area.hidden { display: none; }

/* ═══════════════════════════════════════════════════════════
   HOME / LANDING PAGE
   ═══════════════════════════════════════════════════════════ */

/* Logo link */
#site-logo {
  cursor: pointer;
  user-select: none;
}

#site-logo:hover { opacity: 0.8; }

/* Header title row: 3-column grid — [back btn] [Lojikr] [spacer]
   Width is capped to the board width so the back button aligns with the board edge */
.header-title-row {
  display: grid;
  grid-template-columns: 36px 1fr 36px;
  align-items: center;
  width: 100%;
  max-width: calc(15 * var(--cell-size));
  margin: 0 auto;
}

#site-logo { text-align: center; }

.header-spacer { width: 36px; }

.header-back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--button-border-color, rgba(128,128,128,.4));
  border-radius: 8px;
  background: none;
  cursor: pointer;
  color: var(--text-color);
  transition: background .15s;
}
.header-back-btn svg { width: 18px; height: 18px; display: block; overflow: visible; }
.header-back-btn:hover  { background: rgba(128,128,128,.15); }
.header-back-btn:active { background: rgba(128,128,128,.25); }

/* Home panel fills available space, centred column */
#home-panel {
  width: 100%;
  max-width: 640px;
  padding: 4px 0 20px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ─── Mode cards grid ────────────────────────────────────── */
.home-mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.home-mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 18px 12px;
  border-radius: 14px;
  border: 2px solid var(--border-color);
  background: var(--item-bg-color);
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  position: relative;
  overflow: hidden;
  color: var(--text-color);
}

.home-mode-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent, #2196f3);
  border-radius: 12px 12px 0 0;
}

.home-mode-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,.18);
  border-color: var(--card-accent, #2196f3);
}

.home-mode-card:active { transform: translateY(0); }

.home-card-icon {
  font-size: 36px;
  line-height: 1;
}

.home-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-color);
}

.home-card-desc {
  font-size: 12px;
  opacity: 0.65;
  line-height: 1.35;
  color: var(--text-color);
}

/* ─── Home sections (leaderboard, archive) ───────────────── */
.home-section {
  margin-top: 20px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.home-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.home-section-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-color);
}

.home-section-header .home-section-title {
  margin-bottom: 0;
}

.home-play-today-btn {
  flex-shrink: 0;
  white-space: nowrap;
}

/* ─── Streak row ─────────────────────────────────────────── */
.streak-row {
  display: flex;
  justify-content: center;
  margin-top: 4px;
}

.streak-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 14px 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--button-bg-color);
  text-align: center;
}

.streak-icon  { font-size: 22px; line-height: 1; }
.streak-value { font-size: 30px; font-weight: 700; line-height: 1; color: #2196f3; }
.streak-label { font-size: 10px; color: var(--button-border-color); letter-spacing: .4px; text-transform: uppercase; }

/* ─── Today's leaderboard scroll hint ───────────────────── */
.home-lb-scroll {
  position: relative;
  min-height: 285px;
  overflow-anchor: none;
}

/* Fade + blur the 7th row as a visual "there's more" cue */
.home-lb-scroll.home-lb-has-more .lb-table tbody tr:nth-child(7) {
  opacity: 0.25;
  filter: blur(1.5px);
  pointer-events: none;
  user-select: none;
}

/* ─── Daily calendar (shared between home archive + daily panel) */
.daily-calendar {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  padding: 4px 0 8px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

/* selected chip in daily mode calendar */
.day-chip.selected-day {
  border-color: var(--selected-outline-color);
  font-weight: 700;
}

/* archive chip selected state */
.day-chip.archive-selected {
  background: #2196f3;
  color: #fff;
  border-color: #2196f3;
}

/* ─── Archive leaderboard panel ──────────────────────────── */
.archive-lb-panel {
  margin-top: 12px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px;
  background: var(--button-bg-color);
}

.archive-lb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.archive-lb-date {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-color);
}

.archive-lb-loading {
  text-align: center;
  padding: 12px;
  opacity: 0.55;
  font-size: 13px;
}

.archive-lb-empty {
  text-align: center;
  padding: 10px 0;
  opacity: 0.6;
  font-size: 13px;
  margin: 0;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — LANDING PAGE
   ═══════════════════════════════════════════════════════════ */
@media (min-width: 540px) {
  .home-mode-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
  }

  .home-card-desc { font-size: 11px; }
}

@media (max-width: 400px) {
  .home-mode-card { padding: 14px 8px; }
  .home-card-icon { font-size: 30px; }
  .home-card-title { font-size: 13px; }
  .home-card-desc { display: none; }
}

/* ─── Community puzzle info panel ─────────────────────────── */
#community-puzzle-info {
  padding: 2px 0 6px;
}

#cp-title {
  color: var(--text-color);
}

/* ─── Community pagination row ───────────────────────────── */
#community-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* ─── Creator palette ─────────────────────────────────────── */
.creator-section {
  margin-bottom: 6px;
}

.creator-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--button-border-color);
  margin-bottom: 4px;
}

.creator-hint {
  font-size: 10px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: .7;
}

.creator-palette {
  display: flex;
  flex-direction: row;
  gap: 4px;
  flex-wrap: wrap;
}

.creator-color-group {
  display: flex;
  flex-direction: row;
  gap: 3px;
}

/* Per-color background tints */
.creator-red   .creator-item { background: rgba(229,57,53,.18);  border-color: rgba(229,57,53,.55); }
.creator-blue  .creator-item { background: rgba(30,136,229,.18); border-color: rgba(30,136,229,.55); }
.creator-green .creator-item { background: rgba(67,160,71,.18);  border-color: rgba(67,160,71,.55); }

.creator-item {
  min-width: 30px;
  height: 30px;
  padding: 0 6px;
  border: 2px solid transparent;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-color);
  transition: transform .1s, box-shadow .1s, border-color .1s;
}

.creator-item:hover {
  transform: scale(1.08);
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

/* Selected state — bright outline for each color */
.creator-red   .creator-item.selected {
  outline: 2px solid #e53935;
  border-color: #e53935;
  background: rgba(229,57,53,.35);
}
.creator-blue  .creator-item.selected {
  outline: 2px solid #1e88e5;
  border-color: #1e88e5;
  background: rgba(30,136,229,.35);
}
.creator-green .creator-item.selected {
  outline: 2px solid #43a047;
  border-color: #43a047;
  background: rgba(67,160,71,.35);
}

/* Disabled while game running */
body.running .creator-item,
body.paused  .creator-item {
  opacity: .4;
  pointer-events: none;
}

/* ─── Star rating interactive buttons ────────────────────── */
.cp-star-btn:hover {
  color: #f9a825 !important;
  transform: scale(1.15);
  transition: transform 0.1s;
}

/* ═══════════════════════════════════════════════════════════
   OPTIMUM HOLDER BADGE (shown in leaderboard overlays)
   ═══════════════════════════════════════════════════════════ */

.optimum-holder-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  margin-bottom: 10px;
  background: linear-gradient(135deg, rgba(156,39,176,.18), rgba(156,39,176,.06));
  border: 1px solid rgba(156,39,176,.45);
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-color);
  flex-wrap: wrap;
}
.optimum-holder-row .oh-icon  { font-size: 18px; flex-shrink: 0; }
.optimum-holder-row .oh-label { opacity: .7; }
.optimum-holder-row .oh-name  { font-weight: 700; color: #ce93d8; }
.optimum-holder-row .oh-parts { font-weight: 600; }
.optimum-holder-row .oh-you   { color: #00c853; font-weight: 700; }

/* ═══════════════════════════════════════════════════════════
   SOLUTIONS ARCHIVE (home page section)
   ═══════════════════════════════════════════════════════════ */

.solutions-archive-section { margin-top: 4px; }

.solutions-date-group { margin-bottom: 14px; }

.solutions-date-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .5px;
  opacity: .55;
  text-transform: uppercase;
  margin-bottom: 6px;
  padding-left: 2px;
}

.solutions-card-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.solution-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--button-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: background .12s;
}
.solution-card:hover { background: rgba(128,128,128,.12); }
.solution-card .sc-initials  { font-weight: 700; min-width: 28px; }
.solution-card .sc-time      { opacity: .75; min-width: 48px; }
.solution-card .sc-parts     { opacity: .75; min-width: 52px; }
.solution-card .sc-badge     { margin-left: auto; font-size: 11px; opacity: .6; }
.solution-card .sc-view      {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  border: 1px solid var(--button-border-color);
  border-radius: 5px;
  background: none;
  color: var(--text-color);
  cursor: pointer;
  flex-shrink: 0;
}
.solution-card .sc-view:hover { background: rgba(128,128,128,.15); }

.solutions-show-more {
  font-size: 12px;
  opacity: .55;
  padding: 4px 0;
  text-align: center;
  cursor: pointer;
}
.solutions-show-more:hover { opacity: .85; }

/* ═══════════════════════════════════════════════════════════
   SOLUTION VIEWER MODAL
   ═══════════════════════════════════════════════════════════ */

#solutionViewerOverlay {
  position: fixed;
  inset: 0;
  z-index: 10100;
  background: rgba(0,0,0,.85);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  box-sizing: border-box;
}

.sv-box {
  background: var(--bg-color);
  border-radius: 14px;
  padding: 20px;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: 90vh;
  overflow-y: auto;
}

.sv-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.sv-title    { font-size: 16px; font-weight: 700; flex: 1; }
.sv-close    {
  background: none; border: none; font-size: 20px; cursor: pointer;
  color: var(--text-color); opacity: .6; padding: 0 4px;
}
.sv-close:hover { opacity: 1; }

.sv-meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  flex-wrap: wrap;
}
.sv-meta span { opacity: .75; }
.sv-meta strong { opacity: 1; }

/* Mini-board grid for solution viewer */
.sv-board {
  display: grid;
  gap: 1px;
  background: var(--border-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 15 / 10;
}
.sv-cell {
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  line-height: 1;
  min-width: 0;
}
.sv-cell.has-comp { background: rgba(128,128,128,.08); font-size: 13px; }
.sv-cell.is-target { background: rgba(0,200,83,.12); }

.sv-load-btn {
  padding: 10px;
  background: #2196f3;
  color: #fff;
  border: none;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.sv-load-btn:hover { background: #1976d2; }

/* ═══════════════════════════════════════════════════════════
   FEEDBACK LINK (below mode cards on home page)
   ═══════════════════════════════════════════════════════════ */

.home-feedback-link {
  text-align: center;
  font-size: 12px;
  opacity: .55;
  margin: -6px 0 14px;
}
.home-feedback-link a {
  color: var(--text-color);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.home-feedback-link a:hover { opacity: .85; }

/* ═══════════════════════════════════════════════════════════
   FIXED PAGE CONTROLS (corners)
   ═══════════════════════════════════════════════════════════ */

#page-controls-left,
#page-controls-right {
  position: fixed;
  top: 10px;
  z-index: 5000;
  display: flex;
  align-items: center;
  gap: 6px;
}
#page-controls-left  { left: 10px; }
#page-controls-right { right: 10px; }

.page-ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 10px;
  background: var(--button-bg-color);
  border: 1px solid var(--button-border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background .12s;
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
}
.page-ctrl-btn:hover  { background: rgba(128,128,128,.18); }
.page-ctrl-btn:active { background: rgba(128,128,128,.3); }

.page-ctrl-icon {
  width: 32px;
  padding: 0;
}
.page-ctrl-icon svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Heart icon fill colour */
#donateBtn svg { color: #e91e63; }

/* ═══════════════════════════════════════════════════════════
   DONATION MODAL
   ═══════════════════════════════════════════════════════════ */

.donate-box {
  background: var(--bg-color);
  border-radius: 16px;
  padding: 24px 22px 20px;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.donate-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.donate-text {
  font-size: 14px;
  line-height: 1.55;
  opacity: .85;
  margin: 0;
}

.donate-amounts {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.donate-amount-btn {
  flex: 1;
  max-width: 80px;
  padding: 12px 8px;
  background: #e91e63;
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background .15s, transform .1s;
}
.donate-amount-btn:hover  { background: #c2185b; transform: translateY(-1px); }
.donate-amount-btn:active { background: #880e4f; transform: translateY(0); }

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

.donate-currency {
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.donate-custom-input {
  flex: 1;
  padding: 9px 10px;
  border: 1.5px solid var(--border-color);
  border-radius: 8px;
  background: var(--button-bg-color);
  color: var(--text-color);
  font-size: 15px;
  min-width: 0;
}
.donate-custom-input:focus { outline: 2px solid #e91e63; border-color: #e91e63; }

.donate-custom-go {
  flex-shrink: 0;
  max-width: none;
  padding: 10px 14px;
  font-size: 14px;
}