:root {
  --bg: #e8e2d5;
  --panel: rgba(246, 239, 223, 0.93);
  --text: #2e2012;
  --accent: #8b5e34;
  --accent-2: #c79a63;
  --line: #8a6a48;
  --shadow: 0 10px 24px rgba(60, 41, 22, 0.16);
}
body.dark {
  --bg: #1d2230;
  --panel: rgba(37, 47, 68, 0.95);
  --text: #f2f6ff;
  --accent: #91adff;
  --accent-2: #6dd7d0;
  --line: #9cb4ea;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,sans-serif;color:var(--text);background:radial-gradient(circle at top right,#f5efe1,var(--bg))}
body.dark{background:radial-gradient(circle at top right,#2a3248,var(--bg))}
.hidden, #gamePage.hidden {
  display: none !important;
}

.loading-screen{min-height:100vh;display:grid;place-items:center;background:linear-gradient(rgba(255,255,255,.2),rgba(255,255,255,.2)),url('images/daymode.png') center/cover fixed}
.poster{width:min(90vw,460px);padding:1rem;border-radius:26px;background:color-mix(in srgb,var(--accent) 45%, transparent);backdrop-filter: blur(3px);color:#fff;text-align:center;cursor:pointer;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.35)}
.poster-logo{width:120px;height:120px;object-fit:cover;border-radius:16px;margin:.3rem auto .9rem;display:block}
.zoom-card{animation:zoomPulse 2s infinite}@keyframes zoomPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.03)}}

.menu-toggle,.leaderboard-icon{position:fixed;top:14px;z-index:12;border:0;border-radius:12px;padding:.55rem .75rem;background:var(--accent);color:#fff}
.menu-toggle{left:14px}.leaderboard-icon{right:14px}
.sidebar{position:fixed;inset:0 auto 0 0;width:260px;background:var(--panel);box-shadow:var(--shadow);transform:translateX(-100%);transition:.25s;z-index:13;padding:1rem;display:grid;grid-template-rows:auto 1fr auto;border-right:3px solid color-mix(in srgb,var(--accent) 60%, transparent)}
.sidebar.open{transform:translateX(0)}
.side-head{display:flex;justify-content:space-between;align-items:center}
.nav-btn{width:100%;margin:.3rem 0;padding:.6rem;border:1px solid color-mix(in srgb,var(--accent) 45%, transparent);border-radius:8px;background:transparent;color:var(--text);text-align:left;font-family:'Cormorant Garamond',serif;font-size:1.08rem;cursor:pointer}
.sidebar-meta{border-top:1px solid color-mix(in srgb,var(--accent) 35%, transparent);padding-top:.8rem;display:grid;gap:.8rem}

.app{max-width:1120px;margin:0 auto;padding:4.5rem 1rem 2rem;display:grid;gap:1rem}
.card{background:var(--panel);border-radius:18px;padding:1rem;box-shadow:var(--shadow);border:2px solid color-mix(in srgb,var(--accent) 45%, transparent)}
.parchment{background:linear-gradient(rgba(255,255,255,.35),rgba(255,255,255,.35)),var(--panel)}
.topbar .title-aged{font-family:Cinzel,serif;font-size:3rem;margin:0}
.topbar .subtitle-aged{font-family:'Cormorant Garamond',serif;font-size:2rem;margin:.2rem 0 0}
.major-panel{border:3px solid #8b6a34}
.gold-subpanel{border:2px solid #b7934a;border-radius:12px;padding:.8rem;background:rgba(255,250,235,.5);margin-bottom:.75rem}
.split{display:grid;grid-template-columns:150px 1fr;gap:.8rem;align-items:center}
.mini-grid{font-family:Cinzel,serif;font-size:2rem;text-align:center;border:2px solid var(--line);padding:1rem}
.flowchart,.scroll-icon{font-size:1rem;border:1px dashed var(--line);padding:.6rem;border-radius:8px;text-align:center}
.serif-premium{font-family:'Cormorant Garamond',serif}
.wisdom{font-size:1.1rem}

.page{display:grid;gap:.8rem}
.hud{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.5rem}
.controls .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.6rem}
.game-buttons button{min-height:46px}
.sound-row{grid-template-columns:repeat(3,minmax(110px,1fr))!important}
select,input,button{padding:.58rem .65rem;border-radius:10px;border:1px solid color-mix(in srgb,var(--accent) 48%, transparent);background:rgba(255,255,255,.4);color:var(--text)}
button{cursor:pointer;background:linear-gradient(135deg,#9d6a39,#d3a164);color:#fff;border:0;font-weight:700;box-shadow:0 6px 14px rgba(0,0,0,.15)}
body.dark button{background:linear-gradient(135deg,#6f8ee8,#5fcfd2);color:#f8fbff}

.board-wrap{display:grid;justify-items:center}
.sudoku-grid{width:min(70vw,440px);aspect-ratio:1/1;display:grid;border:4px solid #7f5a32;border-radius:0;overflow:hidden;background:linear-gradient(145deg,#b89266,#9f7750);box-shadow:inset 0 0 0 2px rgba(255,235,200,.25);transition:transform .3s ease}
.board-pop{animation:boardPop .35s ease}
@keyframes boardPop{from{transform:scale(.92);opacity:.5}to{transform:scale(1);opacity:1}}
.cell{border:1.6px solid rgba(90,60,35,.55)}
.cell input{width:100%;height:100%;border:0;border-radius:0;padding:0;background:transparent;text-align:center;color:#2a1a0c;font-weight:800;font-size:clamp(.66rem,1.9vw,1.12rem);text-shadow:0 1px 0 rgba(255,255,255,.18)}
.message{min-height:1.2rem;font-weight:700}
.sudoku-grid.size-16 .cell input{
  font-size:clamp(.5rem,1.05vw,.78rem);
  font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  font-weight:700;
  line-height:1;
  letter-spacing:0;
}
.sudoku-grid.size-16 .cell{
  border-width:1px;
}

.futuristic{background:linear-gradient(135deg, color-mix(in srgb,var(--accent) 25%, transparent), color-mix(in srgb,var(--accent-2) 25%, transparent));}
.timer-settings{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))!important}

.switch{position:relative;width:52px;height:28px}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;inset:0;background:#939393;border-radius:999px}
.slider:before{content:"";position:absolute;width:22px;height:22px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked + .slider{background:var(--accent-2)}
.switch input:checked + .slider:before{transform:translateX(24px)}

/* --- Upgraded Leaderboard Table Formatting --- */
.leader-table {
  width: 100%;
  border-collapse: collapse;
  text-align: center; 
  margin-top: 0.5rem;
  font-family: 'Inter', sans-serif;
}
.leader-table th {
  padding: 0.8rem 0.5rem;
  background-color: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  font-weight: 800;
  border-bottom: 2px solid var(--accent);
  white-space: nowrap;
}
.leader-table td {
  padding: 0.8rem 0.5rem;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.leader-table td:first-child, .leader-table th:first-child {
  text-align: left;
}
.leader-table tr:nth-child(even) td {
  background-color: rgba(0, 0, 0, 0.02);
}
body.dark .leader-table tr:nth-child(even) td {
  background-color: rgba(255, 255, 255, 0.02);
}

.win-modal{position:fixed;inset:0;background:rgba(10,14,22,.6);display:grid;place-items:center;z-index:20}
.win-card{width:min(90vw,420px);background:var(--panel);border-radius:16px;padding:1rem;text-align:center}
.crackers{font-size:1.3rem;animation:sparkle 1.2s linear infinite}@keyframes sparkle{0%,100%{opacity:.25}50%{opacity:1}}
.balloons{display:flex;justify-content:center;gap:14px;margin:.6rem 0}.balloons span{width:16px;height:22px;border-radius:50%;animation:float 1.8s infinite ease-in-out}
.balloons span:nth-child(1){background:#ff9f43}.balloons span:nth-child(2){background:#54a0ff;animation-delay:.2s}.balloons span:nth-child(3){background:#1dd1a1;animation-delay:.4s}.balloons span:nth-child(4){background:#f368e0;animation-delay:.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

@media(max-width:760px){#gamePage{grid-template-columns:1fr}#gamePage .board-wrap{grid-column:1;justify-self:center;position:static}#gamePage .hud,#gamePage .controls{grid-column:1}#gamePage .controls .row{grid-template-columns:1fr}.controls .row.buttons{max-width:none;margin-left:0}}
@media(max-width:860px){.split{grid-template-columns:1fr}.sudoku-grid{width:min(92vw,390px)}}

.bottom-line{margin:1rem auto 1.5rem;text-align:center;font-family:'Cormorant Garamond',serif;font-size:1.05rem;color:var(--text);opacity:.9}
.game-buttons{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))!important}
.controls .row.buttons{margin-top:.25rem}

body.dark .loading-screen{background:linear-gradient(rgba(12,18,30,.35),rgba(12,18,30,.35)),url('images/nightmode.png') center/cover fixed}

.topbar{display:none}

#gamePage{display:grid;grid-template-columns:minmax(320px,460px) minmax(300px,1fr);gap:1rem;align-items:start}
#gamePage .board-wrap{grid-column:1;justify-self:start;position:sticky;top:20px}
#gamePage .hud,#gamePage .controls{grid-column:2}
.controls .row.buttons{grid-template-columns:1fr!important;max-width:240px;margin-left:auto}

.leaderboard-icon{font-size:1.2rem;font-weight:700;line-height:1}

body.dark .sudoku-grid{border-color:#8daef2;background:linear-gradient(145deg,#5f6678,#737d92)}
body.dark .cell{border-color:rgba(160,186,246,.45)}
body.dark .cell input{color:#f5f8ff;text-shadow:none}

#gamePage .controls{display:grid;gap:.8rem}
#gamePage .controls .row{grid-template-columns:1fr 1fr}
#gamePage .controls .row.buttons{grid-template-columns:1fr!important;max-width:260px;margin-left:auto}

#settingsPage{font-family:Inter,sans-serif}
#settingsPage h2,#settingsPage h3{font-family:'Cormorant Garamond',serif;letter-spacing:.3px}
#settingsPage .timer-settings{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:.6rem}
#settingsPage .buttons{display:flex;flex-wrap:wrap;gap:.6rem}
body.dark #settingsPage, body.dark #leaderboardPage, body.dark #aboutPage{background:rgba(48,57,78,.92);border-color:#8eabeb}
body.dark #settingsPage input, body.dark #leaderboardPage td, body.dark #leaderboardPage th{color:#f1f5ff}

#aboutPage p{font-family:Inter,sans-serif;line-height:1.45}
#aboutPage .team-box span{font-family:Inter,sans-serif;opacity:.9}

#gamePage{grid-template-columns:minmax(320px,520px) minmax(320px,1fr)!important}
#gamePage .controls .row{grid-template-columns:1fr 1fr!important}
#gamePage .controls .row.buttons{grid-template-columns:1fr!important;max-width:220px!important}

body.dark .sudoku-grid{border:4px solid #d9e4ff;background:#1f2b44;box-shadow:0 0 0 1px #a9bff8 inset}
body.dark .cell{border:1.4px solid #5f79b5}
body.dark .cell input{color:#f8fbff;font-weight:800}
body.dark .board-wrap{background:rgba(19,28,45,.95)}
body.dark .sudoku-grid.size-16 .cell input{font-weight:700}

/* --- final game layout overrides --- */
.app{max-width:min(1400px,95vw)}
#gamePage{
  display:grid !important;
  grid-template-columns:minmax(420px,760px) minmax(320px,520px) !important;
  grid-template-areas:
    'board hud'
    'board controls';
  gap:1rem;
  align-items:start;
}
#gamePage .board-wrap{
  grid-area:board;
  justify-self:stretch;
  position:sticky;
  top:16px;
  min-height:640px;
}
#gamePage .hud{grid-area:hud}
#gamePage .controls{grid-area:controls}
#gamePage .controls .row.buttons{
  grid-template-columns:repeat(2,minmax(120px,1fr)) !important;
  max-width:none !important;
  margin-left:0 !important;
}
#gamePage .controls .row.buttons button{min-height:52px}
#gamePage .sudoku-grid{
  width:min(100%,680px);
  margin:0 auto;
}

@media (max-width:980px){
  #gamePage{
    grid-template-columns:1fr !important;
    grid-template-areas:'hud' 'controls' 'board';
  }
  #gamePage .board-wrap{position:static;min-height:auto}
  #gamePage .controls .row.buttons{grid-template-columns:1fr !important}
}

.launch-panel h3{margin:.1rem 0 .5rem;font-family:'Cormorant Garamond',serif;font-size:1.4rem}
.launch-grid{display:grid;grid-template-columns:repeat(2,minmax(150px,1fr));gap:.6rem;align-items:end}
.inline-check{display:flex;align-items:center;gap:.5rem;font-weight:600}

#settingsPage .buttons button{min-width:170px}

/* overlap + spacing fixes */
.menu-toggle{left:8px;top:8px}
.leaderboard-icon{right:12px;top:12px;z-index:16}
body.menu-open .leaderboard-icon{opacity:.2;pointer-events:none}

/* game alignment polish */
#gamePage .hud{margin-top:.65rem}
#gamePage .board-wrap{max-width:620px}
#gamePage .sudoku-grid{width:min(100%,560px)}

/* keep settings isolated look */
#settingsPage{max-width:100%;display:grid;gap:1rem}

@media (max-width:540px){
  .menu-toggle,.leaderboard-icon{width:42px;height:42px;padding:0;border-radius:12px}
  #gamePage .hud{margin-top:1rem}
  #gamePage .sudoku-grid{width:min(96vw,420px)}
}

/* final cleanup: no elements behind board + clear pages */
.sidebar{background:rgba(246,239,223,1)!important;backdrop-filter:none!important;z-index:30}
body.dark .sidebar{background:rgba(32,41,58,1)!important}

#gamePage{display:grid!important;grid-template-columns:minmax(360px,620px) minmax(360px,1fr)!important;gap:1rem;align-items:start}
#gamePage .board-wrap{position:static!important;min-height:auto!important;z-index:1}
#gamePage .hud,#gamePage .controls{z-index:2}
#gamePage .sudoku-grid{width:min(100%,560px)!important}
.sudoku-grid.size-16{width:min(100%,640px)!important}

.controls .row.buttons{grid-template-columns:repeat(2,minmax(120px,1fr))!important;max-width:none!important;margin:0!important}

.page{background:var(--panel)!important;opacity:1!important}
#homePage h2,#homePage h3{font-family:'Cormorant Garamond',serif}
#homePage p,#homePage li{line-height:1.5}

.leaderboard-icon{z-index:40}
.menu-toggle{z-index:40}

@media (max-width:980px){
  #gamePage{grid-template-columns:1fr!important}
  .controls .row.buttons{grid-template-columns:1fr!important}
}

/* ===== responsive + day/night fixes ===== */
:root{
  --card-solid: rgba(250,245,235,.96);
}
body.dark{
  --card-solid: rgba(34,44,66,.96);
}
.page,.card,.controls,.hud,.board-wrap,#settingsPage,#leaderboardPage,#aboutPage,#dailyPage,#homePage{
  background: var(--card-solid) !important;
}

/* consistent text contrast in dark mode */
body.dark,
body.dark p,
body.dark li,
body.dark label,
body.dark h1,
body.dark h2,
body.dark h3,
body.dark strong,
body.dark span {
  color: #eef3ff;
}
body.dark select,
body.dark input {
  background: rgba(255,255,255,.08);
  color: #eef3ff;
  border-color: rgba(173,196,255,.55);
}

/* layout responsiveness */
.app{width:min(1400px,96vw);padding:clamp(.55rem,1.2vw,1rem)}
#gamePage{
  display:grid !important;
  grid-template-columns:minmax(320px,1fr) minmax(320px,1fr) !important;
  gap:clamp(.65rem,1.1vw,1rem);
  align-items:start;
}
#gamePage .board-wrap{grid-column:1;max-width:100%;overflow:hidden}
#gamePage .hud,#gamePage .controls{grid-column:2}
#gamePage .controls .row{grid-template-columns:repeat(2,minmax(140px,1fr)) !important}
#gamePage .controls .row.buttons{grid-template-columns:repeat(2,minmax(120px,1fr)) !important}
#gamePage .sudoku-grid{width:min(100%,560px)!important}

/* sidebar + floating icons mobile safe */
.sidebar{max-width:84vw}
.menu-toggle,.leaderboard-icon{width:44px;height:44px;display:grid;place-items:center;font-size:1.05rem;border-radius:12px}

@media (max-width:1100px){
  #gamePage{grid-template-columns:1fr !important;grid-template-areas:'hud' 'controls' 'board'}
  #gamePage .hud{grid-area:hud}
  #gamePage .controls{grid-area:controls}
  #gamePage .board-wrap{grid-area:board;justify-self:center}
}
@media (max-width:760px){
  .app{width:96vw;padding:.55rem}
  .page,.card{padding:.75rem}
  #gamePage .controls .row,
  #gamePage .controls .row.buttons,
  .launch-grid,
  #settingsPage .timer-settings{grid-template-columns:1fr !important}
  .leaderboard-panel{right:8px;left:8px;width:auto}
  .bottom-line{font-size:.92rem;padding:0 .4rem;text-align:center}
}

/* --- New Redesign for Daily, About, and Settings --- */
#dailyPage, #settingsPage {
  text-align: center;
  padding: 2rem;
}
#aboutPage {
  padding: 2rem;
}
#dailyPage h2, #aboutPage h2, #settingsPage h2 {
  color: var(--accent);
  font-size: 2rem;
  margin-bottom: 1rem;
}
#dailyBtn {
  font-size: 1.25rem;
  padding: 1rem 2.5rem;
  margin: 1.5rem auto;
  display: inline-block;
  box-shadow: 0 4px 15px rgba(139, 94, 52, 0.4);
  transition: transform 0.2s ease-in-out;
}
#dailyBtn:hover {
  transform: scale(1.05);
}
#settingsPage .timer-settings {
  justify-content: center;
  margin-bottom: 2rem;
}
#settingsPage .buttons {
  justify-content: center;
  gap: 1rem;
}
#settingsPage label {
  display: block;
  margin-bottom: 0.8rem;
  font-size: 1.1rem;
}

/* Fix for Dark Mode Dropdown Options */
body.dark option {
  background-color: #252f44;
  color: #eef3ff;
}

/* --- Phase 2: Advanced Grid Highlighting --- */
/* 1. The specifically selected cell */
.cell.selected {
  background-color: color-mix(in srgb, var(--accent) 35%, transparent) !important;
}

/* 2. The row, column, and 3x3 box peers */
.cell.highlight-peer {
  background-color: color-mix(in srgb, var(--accent) 15%, transparent);
}

/* 3. Matching numbers elsewhere on the board */
.cell.highlight-match {
  background-color: color-mix(in srgb, var(--accent-2) 50%, transparent);
}
.cell.highlight-match input {
  color: #fff !important;
  text-shadow: 0 0 8px var(--accent);
}

/* Dark Mode Overrides for Highlights */
body.dark .cell.selected {
  background-color: color-mix(in srgb, var(--accent) 45%, transparent) !important;
}
body.dark .cell.highlight-peer {
  background-color: color-mix(in srgb, var(--accent) 20%, transparent);
}
body.dark .cell.highlight-match {
  background-color: color-mix(in srgb, var(--accent-2) 40%, transparent);
}

/* --- Phase 6: Impressive About Page --- */
.tech-stack {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.tech-pill {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.7rem;margin-top:.4rem}
.team-box{display:grid;gap:.2rem;padding:.8rem;border-radius:12px;border:2px solid color-mix(in srgb,var(--accent) 55%, transparent);background:rgba(255,255,255,.35);text-decoration:none;color:var(--text)}
.team-box strong{font-family:'Cormorant Garamond',serif;font-size:1.15rem}
.member-icon,.link-icon{display:inline-flex;align-items:center;justify-content:center;width:1.2rem}

.member-role {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  font-weight: 800;
  opacity: 0.9;
}
.member-id {
  font-size: 0.75rem;
  font-family: monospace;
  opacity: 0.65;
  margin-top: 0.1rem;
  margin-bottom: 0.3rem;
  letter-spacing: 0.5px;
}
.link-label {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-top: 0.2rem;
}
/* Enhanced Interactive Hover Effects for Team Cards */
.team-box {
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  overflow: hidden;
  align-content: center;
}
.team-box:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px color-mix(in srgb, var(--accent) 25%, transparent);
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.6);
}
body.dark .team-box:hover {
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 24px color-mix(in srgb, var(--accent-2) 15%, transparent);
}
.coordinator-box {
  margin-top: 2.5rem;
  text-align: center;
  padding: 1.5rem;
  border-radius: 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 10%, transparent), transparent);
  border: 2px dashed color-mix(in srgb, var(--accent) 30%, transparent);
}
.special-box {
  max-width: 300px;
  margin: 0 auto;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}