/* Sudoku Game Plugin Styles - NYT Inspired - FIXED LAYOUT */

/* Import Montserrat font */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&display=swap');

/* Base CSS Variables - NYT Style */
:root {
  /* Brand Colors */
  --primary-green: #00843d;
  --wolverine-green: #008a40;
  --lake-calm: #87c7ba;
  --heritage-brick: #b45336;
  --pale-meadow: #c5d97a;
  --sea-haze: #c4d6c1;
  --legacy-gold: #d2ac5f;
  
  /* NYT-inspired Typography */
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;
  
  /* Spacing System */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
}

/* Light Theme (Default) - NYT Style */
.sudoku-game-container,
[data-theme="light"] .sudoku-game-container {
  /* Light Theme Colors - Clean & Minimal */
  --bg-primary: #ffffff;
  --bg-secondary: #f7f8f9;
  --bg-tertiary: #f1f2f3;
  --text-primary: #000000;
  --text-secondary: #363636;
  --text-tertiary: #757575;
  --text-muted: #999999;
  --border-primary: #dfdfdf;
  --border-secondary: #e6e6e6;
  --border-light: #f4f4f4;
  --shadow-subtle: rgba(0, 0, 0, 0.04);
  --shadow-light: rgba(0, 0, 0, 0.08);
  --shadow-medium: rgba(0, 0, 0, 0.12);
  
  /* Game Colors - Light Theme (NYT neutral board with brand accents) */
  --cell-bg: #ffffff;
  --cell-bg-alt: #ffffff;
  --cell-hover: #f8f9fa;
  --cell-selected: #f1f2f3;
  --cell-selected-same: #b8e5d0; /* More distinct light green for same numbers */
  --cell-selected-row-col: #f2f9f6; /* Very light green for rows/columns */
  --cell-selected-box: #e8f4ee; /* Light green for 3x3 box */
  --cell-original: #ffffff;
  --cell-error: var(--heritage-brick);
  --cell-conflict: var(--legacy-gold);
  --cell-border: #d0d0d0;
  --cell-border-thick: #000000;
  --number-original: #000000;
  --number-user: #000000;
  --number-error: var(--heritage-brick);
  --number-pencil: #757575;
}

/* Dark Theme - NYT Style with WCAG Compliance */
[data-theme="dark"] .sudoku-game-container {
  /* Dark Theme Colors - Sophisticated with improved contrast */
  --bg-primary: #121211;
  --bg-secondary: #1a1a19;
  --bg-tertiary: #262625;
  --text-primary: #ffffff;
  --text-secondary: #f0f0f0; /* Increased contrast from #e0e0e0 */
  --text-tertiary: #c8c8c8; /* Increased contrast from #b0b0b0 */
  --text-muted: #a0a0a0; /* Increased contrast from #888888 */
  --border-primary: #4a4a4a; /* Slightly more visible */
  --border-secondary: #5a5a5a; /* Slightly more visible */
  --border-light: #3a3a3a; /* Slightly more visible */
  --shadow-subtle: rgba(255, 255, 255, 0.05);
  --shadow-light: rgba(255, 255, 255, 0.08);
  --shadow-medium: rgba(255, 255, 255, 0.12);
  
  /* Game Colors - Dark Theme (NYT neutral board with brand accents) - Enhanced for contrast */
  --cell-bg: #1b1b1b;
  --cell-bg-alt: #1b1b1b;
  --cell-hover: #2a2a2a; /* Enhanced for better visibility */
  --cell-selected: #00843d; /* Use primary green for consistency */
  --cell-selected-same: #2d5e45; /* More distinct darker green for same numbers */
  --cell-selected-row-col: #1a2e23; /* Very dark green for rows/columns */
  --cell-selected-box: #1c3426; /* Medium dark green for 3x3 box */
  --cell-original: #1b1b1b;
  --cell-error: #c55a40; /* Slightly brighter version of heritage brick for dark theme */
  --cell-conflict: #e0bb60; /* Slightly brighter version of legacy gold for dark theme */
  --cell-border: #4a4a4a; /* Increased contrast for borders */
  --cell-border-thick: #f0f0f0; /* Even higher contrast for thick borders */
  --number-original: #ffffff;
  --number-user: #ffffff;
  --number-error: #ffffff; /* Always white text on error background for contrast */
  --number-pencil: #c8c8c8; /* Increased contrast */
}

/* Accent Colors - NYT Style */
:root {
  --accent-gold: #d2ac5f;
  --accent-brick: #b45336;
  --accent-green: #78be3f;
  --accent-teal:  #87c7ba;
}

/* Base Container - NYT Style */
.sudoku-game-container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.4;
  background: var(--bg-primary);
  color: var(--text-primary);
  border-radius: 0;
  box-shadow: none;
  transition: none;
  position: relative;
}

/* Header Section */
.sudoku-header {
  text-align: center;
  padding: var(--space-8) var(--space-6) var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

/* Start Screen - Clean NYT Style */
.sudoku-start-screen {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  background: var(--bg-primary);
}

.sudoku-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--space-4);
  font-family: 'Montserrat', serif;
  letter-spacing: -0.02em;
}

.sudoku-description {
  font-size: var(--font-size-md);
  font-weight: 400;
  color: var(--text-secondary);
  margin: 0 0 var(--space-2);
  line-height: 1.5;
}

.sudoku-rules {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--text-tertiary);
  margin: 0 0 var(--space-8);
  line-height: 1.6;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.sudoku-difficulty-section {
  margin-bottom: var(--space-8);
}

.sudoku-difficulty-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sudoku-difficulty-buttons {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

.sudoku-difficulty-btn {
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: 'Montserrat', sans-serif;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  min-width: 80px;
}

.sudoku-difficulty-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
}

.sudoku-difficulty-btn.active {
  background: var(--primary-green);
  color: white;
  border-color: var(--primary-green);
}

.sudoku-difficulty-btn.active:hover {
  background: #275D38; /* Darker green on hover */
  border-color: #275D38;
  color: white; /* Ensure text stays white */
}

.sudoku-start-btn {
  background: var(--primary-green);
  color: white;
  border: none;
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-md);
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  text-transform: none;
  letter-spacing: normal;
  box-shadow: none;
  margin-top: var(--space-2);
}

.sudoku-start-btn:hover {
  background: #275D38; /* Darker green on hover */
  color: white; /* Ensure text stays white */
  transform: none;
}

.sudoku-start-btn:active {
  transform: translateY(1px);
}

/* Game Area - NYT Layout */
.sudoku-game-area {
  padding: var(--space-6);
  background: var(--bg-primary);
}

/* MAIN LAYOUT FIX - Responsive Implementation */
.sudoku-container {
  display: flex;
  gap: var(--space-8); /* Increased gap for better separation */
  justify-content: center;
  align-items: flex-start;
  flex-wrap: nowrap;
  max-width: 1400px; /* Further increased to 1400px for optimal layout with 800px board */
  margin: 0 auto;
}

/* Board Section */
.sudoku-board-container {
  flex: 0 0 auto;
  max-width: 100%;
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 0;
  width: 100%;
  max-width: 800px; /* Significantly increased to 800px for optimal desktop/laptop experience */
  height: auto;
  aspect-ratio: 1;
  background: var(--cell-border-thick);
  border: 3px solid var(--cell-border-thick);
  box-shadow: 0 4px 12px var(--shadow-medium);
  box-sizing: border-box;
  
  /* Ensure cells fit properly */
  overflow: hidden;
}

/* Controls Section */
.sudoku-controls-container {
  flex: 0 0 auto;
  width: 240px; /* Increased width for better desktop experience */
  min-width: 220px;
  max-width: 260px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Game Info Bar - Minimal NYT Style */
.sudoku-game-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

.sudoku-info-left {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.sudoku-info-right {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.sudoku-info-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.sudoku-label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.sudoku-value {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'Montserrat', monospace;
  margin: 0;
}

/* FIXED: Traditional Sudoku Board */
.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 0;
  background: var(--cell-border-thick);
  border: 3px solid var(--cell-border-thick);
  margin: 0;
  width: 100%;
  max-width: 800px; /* Significantly increased to 800px for optimal desktop/laptop experience */
  height: auto;
  aspect-ratio: 1;
  box-shadow: 0 4px 12px var(--shadow-medium);
  position: relative;
  box-sizing: border-box;
}

/* Individual cells */
/* Individual cells - Override theme button styles */
.sudoku-cell {
  background: var(--cell-bg);
  font-size: var(--font-size-xl); /* Increased font size for better visibility on larger board */
  font-weight: 500;
  font-family: 'Montserrat', monospace;
  color: var(--number-user);
  cursor: pointer;
  transition: background-color 0.1s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border: 1px solid var(--cell-border);
  user-select: none;
  
  /* Add comfortable padding for desktop/laptop screens */
  padding: 12px !important; /* Increased padding for desktop */
  margin: 0 !important;
  min-height: 0 !important;
  width: 100% !important;
  height: 100% !important;
  aspect-ratio: 1;
  box-sizing: border-box;
  
  /* Ensure text fits properly */
  line-height: 1;
  text-align: center;
  
  /* Additional button resets */
  border-radius: 0 !important;
  text-decoration: none !important;
  text-transform: none !important;
  letter-spacing: normal !important;
  font-style: normal !important;
}

/* 3x3 Grid Sections - Traditional Sudoku Look */
.sudoku-cell:nth-child(3n):not(.sudoku-cell:nth-child(9n)) {
  border-right: 3px solid var(--cell-border-thick);
}

.sudoku-cell:nth-child(9n) {
  border-right: none;
}

.sudoku-cell:nth-child(n+19):nth-child(-n+27):not(.sudoku-cell:nth-child(n+73)),
.sudoku-cell:nth-child(n+46):nth-child(-n+54):not(.sudoku-cell:nth-child(n+73)) {
  border-bottom: 3px solid var(--cell-border-thick);
}

.sudoku-cell:nth-child(n+73) {
  border-bottom: none;
}

/* Cell States - NYT Style with Brand Accents */
.sudoku-cell:hover:not(.original) {
  background: var(--cell-hover);
}

/* Selected cell - Only highlight the clicked cell with WCAG compliant contrast */
.sudoku-cell.selected {
  background: var(--primary-green) !important; /* Use primary green directly */
  color: white !important; /* White text for better contrast (4.5:1 ratio) */
  box-shadow: none; /* No additional border/shadow */
  z-index: 2; /* Make sure selected cell appears above others */
  font-weight: 600; /* Slightly bolder for better visibility */
}

.sudoku-cell.original {
  background: var(--cell-bg-alt);
  color: var(--number-original);
  font-weight: 700;
  font-size: var(--font-size-xl); /* Match the same font size as other cells */
  cursor: default;
}

/* Green-tinted highlighting for same numbers */
.sudoku-cell.same-number:not(.selected) {
  background: var(--cell-selected-same); /* Light green background that complements the primary green */
  color: var(--number-original);
}

.sudoku-cell.error {
  background: var(--heritage-brick) !important;
  color: white !important;
  animation: shake 0.3s ease-in-out;
}

.sudoku-cell.conflict {
  color: var(--number-user);
}

/* Subtle green-tinted highlighting for related cells */
.sudoku-cell.highlight-row,
.sudoku-cell.highlight-col {
  background: var(--cell-selected-row-col); /* Very light green for row/column highlighting */
}

.sudoku-cell.highlight-box {
  background: var(--cell-selected-box); /* Slightly darker green than row/col but still light */
}

/* Number Pad - Following Reference Implementation */
.sudoku-number-pad {
  width: 100%;
}

.sudoku-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

/* Clear button in desktop: position it after the 9 numbers in a 3x4 grid */
.sudoku-clear-btn {
  grid-column: 1 / -1; /* Span full width in desktop */
}

.sudoku-number-btn {
  aspect-ratio: 1;
  padding: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  font-family: 'Montserrat', monospace;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  box-shadow: 0 2px 4px var(--shadow-light);
}

.sudoku-number-btn:hover {
  background: var(--primary-green);
  color: white; /* Ensure text stays white */
  border-color: var(--primary-green);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow-medium);
}

.sudoku-clear-btn {
  background: var(--heritage-brick);
  color: white;
  border: 2px solid var(--heritage-brick);
  padding: var(--space-4);
  font-size: var(--font-size-lg);
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s ease;
  width: 100%;
  box-shadow: 0 2px 4px var(--shadow-light);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  grid-column: 1 / -1; /* Span full width in desktop */
}

.sudoku-clear-btn:hover {
  background: #a0452e;
  border-color: #a0452e;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow-medium);
  color: white; /* Ensure text stays white */
}

/* Clear button icon: keep single definition and remove duplicates */
.sudoku-clear-btn::before {
  content: "✕";
  font-size: var(--font-size-xl);
  font-weight: bold;
}

/* Game Controls - Horizontal row above the board */
.sudoku-game-controls-top {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  margin-bottom: var(--space-6);
  margin-left: auto;
  margin-right: auto;
  /* Match just the board width */
  max-width: 666px; /* Match the board width */
}

.sudoku-control-btn {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-md); /* Increased font size */
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 2px 4px var(--shadow-light);
  flex: 1;
  min-height: 60px; /* Increased height */
}

.sudoku-control-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow-medium);
  color: white; /* Ensure text stays white on dark backgrounds */
}

.sudoku-new-game-btn {
  background: var(--primary-green);
  color: white;
  border-color: var(--primary-green);
}

.sudoku-new-game-btn:hover {
  background: #275D38; /* Darker green on hover */
  border-color: #275D38;
  color: white; /* Ensure text stays white */
}

.sudoku-hint-btn {
  background: var(--legacy-gold);
  color: white;
  border-color: var(--legacy-gold);
}

.sudoku-hint-btn:hover {
  background: #c49d4a;
  border-color: #c49d4a;
  color: white; /* Ensure text stays white */
}

.sudoku-exit-btn {
  background: var(--heritage-brick);
  color: white;
  border-color: var(--heritage-brick);
}

.sudoku-exit-btn:hover {
  background: #a0452e;
  border-color: #a0452e;
  color: white; /* Ensure text stays white */
}

/* Loading Screen - NYT Style */
.sudoku-loading {
  text-align: center;
  padding: var(--space-16) var(--space-6);
}

.sudoku-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-primary);
  border-top: 2px solid var(--primary-green);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-6);
}

.sudoku-loading p {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--text-tertiary);
  margin: 0;
}

/* Win Screen */
.sudoku-win-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(8px);
  padding: 20px;
}

.sudoku-win-dialog {
  background: var(--bg-primary);
  padding: 48px 40px;
  border-radius: 24px;
  text-align: center;
  max-width: 450px;
  width: 100%;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  animation: slideIn 0.6s ease-out;
  border: 2px solid var(--border-light);
}

.sudoku-win-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--primary-green);
  margin-bottom: 16px;
  font-family: 'Montserrat', sans-serif;
}

.sudoku-win-message {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-family: 'Montserrat', sans-serif;
}

.sudoku-win-stats {
  display: flex;
  justify-content: space-around;
  margin-bottom: 32px;
  gap: 20px;
}

.sudoku-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.sudoku-stat-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-muted);
  font-family: 'Montserrat', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sudoku-stat-value {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary-green);
  font-family: 'Montserrat', sans-serif;
}

.sudoku-win-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.sudoku-win-btn {
  padding: 14px 28px;
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 48px;
  min-width: 120px;
}

.sudoku-play-again-btn {
  background: linear-gradient(135deg, var(--primary-green), var(--wolverine-green));
  color: white;
}

.sudoku-back-to-menu-btn {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--border-primary);
}

.sudoku-win-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow-medium);
  color: white; /* Ensure text stays white for dark background buttons */
}

.sudoku-play-again-btn:hover {
  background: linear-gradient(135deg, #275D38, #1a4028); /* Darker gradient on hover */
}

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

/* Animations */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Desktop/Tablet breakpoint - force stacking when too narrow for side-by-side */
@media (max-width: 1400px) { /* Further increased breakpoint for our much larger board */
  .sudoku-container {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
  }
  
  .sudoku-board-container {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  
  .sudoku-board {
    max-width: min(800px, calc(100vw - 48px)); /* Match our new larger 800px board size */
  }
  
  .sudoku-controls-container {
    width: 100%;
    max-width: min(500px, calc(100vw - 48px)); /* Increased for better control layout */
  }
  
  /* Match the game controls width to the board width */
  .sudoku-game-controls-top {
    max-width: min(800px, calc(100vw - 48px));
  }
  
  /* Tablet number pad - keep 3x3 layout but smaller */
  .sudoku-numbers {
    max-width: 350px;
    margin: 0 auto var(--space-4);
  }
  
  .sudoku-clear-btn {
    grid-column: 1 / -1;
  }
}

/* FIXED: Mobile Responsive - Mobile First Approach */
@media (max-width: 768px) {
  /* Base container adjustments */
  .sudoku-game-area {
    padding: var(--space-4);
  }
  
  .sudoku-container {
    gap: var(--space-4);
  }
  
  /* Board adjustments for mobile - ensure all 9 cells are visible */
  .sudoku-board {
    max-width: min(600px, calc(100vw - 32px)); /* Further increased for tablets */
    width: 100%;
    margin: 0 auto;
  }
  
  /* Reduce cell padding for tablets */
  .sudoku-cell {
    padding: 4px !important;
  }
  
  /* Adjust game controls for tablets */
  .sudoku-game-controls-top {
    flex-direction: row;
    gap: var(--space-3);
    max-width: min(600px, calc(100vw - 32px)); /* Match board width for tablets */
  }
  
  .sudoku-control-btn {
    padding: var(--space-3);
    font-size: var(--font-size-sm);
    min-height: 50px;
  }
  
  .sudoku-board-container {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  
  /* Mobile number pad - smaller buttons to prevent cutoff */
  .sudoku-numbers {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: var(--space-2);
    max-width: min(350px, calc(100vw - 32px));
    margin: 0 auto;
  }
  
  /* Position number buttons 1-9 explicitly */
  .sudoku-number-btn[data-number="1"] { grid-column: 1; grid-row: 1; }
  .sudoku-number-btn[data-number="2"] { grid-column: 2; grid-row: 1; }
  .sudoku-number-btn[data-number="3"] { grid-column: 3; grid-row: 1; }
  .sudoku-number-btn[data-number="4"] { grid-column: 4; grid-row: 1; }
  .sudoku-number-btn[data-number="5"] { grid-column: 5; grid-row: 1; }
  .sudoku-number-btn[data-number="6"] { grid-column: 1; grid-row: 2; }
  .sudoku-number-btn[data-number="7"] { grid-column: 2; grid-row: 2; }
  .sudoku-number-btn[data-number="8"] { grid-column: 3; grid-row: 2; }
  .sudoku-number-btn[data-number="9"] { grid-column: 4; grid-row: 2; }
  
  /* X button: position it in the 5th column, 2nd row with proper alignment */
  .sudoku-clear-btn {
    grid-column: 5;
    grid-row: 2;
    aspect-ratio: 1;
    padding: 0 !important;
    margin: 0 !important;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Mobile button sizing */
  .sudoku-number-btn { 
    min-height: 50px; 
    font-size: var(--font-size-md);
    padding: 0;
  }
  
  /* Mobile control buttons - smaller and better spaced */
  .sudoku-control-btn {
    min-height: 42px;
    font-size: var(--font-size-sm);
    padding: var(--space-3) var(--space-4);
  }
  
  /* Game info adjustments for mobile */
  .sudoku-game-info {
    gap: var(--space-3);
    text-align: center;
  }
  
  .sudoku-info-left,
  .sudoku-info-right {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  /* Extra small mobile adjustments */
  .sudoku-game-area {
    padding: var(--space-3);
  }
  
  /* Even smaller board for tiny screens */
  .sudoku-board {
    max-width: min(350px, calc(100vw - 24px)); /* Increased from 300px for better visibility */
  }
  
  /* Smaller number pad for tiny screens */
  .sudoku-numbers {
    max-width: min(300px, calc(100vw - 24px));
    gap: var(--space-1);
  }
  
  /* Remove padding for mobile phones to maximize usable space */
  .sudoku-cell {
    padding: 0 !important;
  }
  
  /* Smaller buttons for tiny screens */
  .sudoku-number-btn, .sudoku-clear-btn { 
    min-height: 44px; 
    font-size: var(--font-size-sm);
  }
  
  /* Game controls for mobile */
  .sudoku-game-controls-top {
    gap: var(--space-2);
    max-width: min(350px, calc(100vw - 24px)); /* Match board width for mobile */
  }
  
  .sudoku-control-btn {
    min-height: 40px;
    font-size: var(--font-size-xs);
    padding: var(--space-2) var(--space-3);
  }
  
  /* Smaller cell text for tiny screens */
  .sudoku-cell {
    font-size: var(--font-size-sm);
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .sudoku-cell {
    border: 1px solid var(--text-primary);
  }
  
  .sudoku-cell.selected {
    background: var(--primary-green);
    color: white;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  .sudoku-cell:hover,
  .sudoku-number-btn:hover,
  .sudoku-control-btn:hover,
  .sudoku-win-btn:hover {
    transform: none;
  }
}

/* Focus styles for accessibility */
.sudoku-cell:focus,
.sudoku-number-btn:focus,
.sudoku-control-btn:focus,
.sudoku-start-btn:focus,
.sudoku-difficulty-btn:focus,
.sudoku-clear-btn:focus,
.sudoku-win-btn:focus {
  outline: 2px solid var(--primary-green);
  outline-offset: 2px;
}

/* Dark theme specific overrides */
[data-theme="dark"] .sudoku-win-overlay {
  background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .sudoku-spinner {
  border-color: var(--border-primary);
  border-top-color: var(--lake-calm);
}