/* Cyber Sudoku stylesheet - Cyberpunk Theme */

:root {
  --bg-dark: #06060c;
  --bg-darker: #030306;
  --panel-bg: rgba(12, 12, 24, 0.75);
  --panel-border: rgba(0, 240, 255, 0.2);
  --panel-border-focus: rgba(189, 0, 255, 0.6);
  
  /* Cyber Colors */
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff0055;
  --neon-purple: #bd00ff;
  --neon-green: #39ff14;
  --neon-orange: #ff9d00;
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --grid-border: rgba(0, 240, 255, 0.15);
  --grid-border-thick: rgba(0, 240, 255, 0.7);

  /* Fonts */
  --font-title: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* CRT monitor simulation */
.crt-scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%);
  background-size: 100% 4px;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.4;
}

.crt-flicker {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(18, 16, 16, 0.1);
  opacity: 0;
  z-index: 9998;
  pointer-events: none;
  animation: flicker 0.15s infinite;
}

@keyframes flicker {
  0% { opacity: 0.15; }
  50% { opacity: 0.18; }
  100% { opacity: 0.14; }
}

/* Particle Canvas for Win Animation */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
}

/* Main App Wrapper */
.app-container {
  width: 100%;
  max-width: 1100px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  z-index: 10;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--neon-cyan);
  padding-bottom: 12px;
  box-shadow: 0 4px 20px -10px rgba(0, 240, 255, 0.3);
}

.header-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.glitch-text {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 10px var(--neon-cyan);
  letter-spacing: 2px;
  position: relative;
}

.sub-logo {
  font-family: var(--font-title);
  color: var(--neon-magenta);
  font-size: 0.85rem;
  font-weight: bold;
  letter-spacing: 1px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

.icon-btn {
  background: rgba(12, 12, 24, 0.6);
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  padding: 8px;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.1);
}

.icon-btn:hover {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
  transform: translateY(-2px);
}

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

.icon {
  width: 22px;
  height: 22px;
}

.hidden {
  display: none !important;
}

/* Layout Columns */
.main-layout {
  display: flex;
  gap: 30px;
  justify-content: center;
  align-items: flex-start;
}

/* Left Column - Board */
.board-column {
  flex: 1;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* Stats Dashboard */
.stats-dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.stat-box {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 10px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.stat-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--neon-cyan);
}

.stat-box:nth-child(2)::before {
  background: var(--neon-purple);
}

.stat-box:nth-child(3)::before {
  background: var(--neon-magenta);
}

.stat-box:nth-child(4)::before {
  background: var(--neon-orange);
}

.stat-label {
  font-family: var(--font-title);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.stat-value {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.2);
}

#timer {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

#difficulty-readout {
  color: var(--neon-purple);
  text-shadow: 0 0 8px rgba(189, 0, 255, 0.4);
}

#mistakes-count {
  color: var(--neon-magenta);
  text-shadow: 0 0 8px rgba(255, 0, 85, 0.4);
}

/* Sudoku Board */
.board-container {
  background: rgba(12, 12, 24, 0.85);
  border: 2px solid var(--neon-cyan);
  border-radius: 8px;
  padding: 8px;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.15), inset 0 0 15px rgba(0, 240, 255, 0.05);
  backdrop-filter: blur(10px);
  position: relative;
}

.sudoku-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  aspect-ratio: 1 / 1;
  width: 100%;
  background: var(--bg-darker);
}

/* Sudoku Cells */
.sudoku-cell {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(8, 8, 16, 0.6);
  border-right: 1px solid var(--grid-border);
  border-bottom: 1px solid var(--grid-border);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--font-title);
  font-size: 1.8rem;
}

/* Thick borders for 3x3 blocks */
.sudoku-cell:nth-child(3n) {
  border-right: 3px solid var(--grid-border-thick);
}
.sudoku-cell:nth-child(9n) {
  border-right: none;
}
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) {
  border-bottom: 3px solid var(--grid-border-thick);
}
.sudoku-cell:nth-child(n+73):nth-child(-n+81) {
  border-bottom: none;
}

/* Cell Visual States */
.sudoku-cell.original-clue {
  color: #ffffff;
  font-weight: 900;
  text-shadow: 0 0 8px var(--neon-cyan);
  background: rgba(0, 240, 255, 0.03);
}

.sudoku-cell.user-value {
  color: var(--neon-cyan);
  font-weight: bold;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.7);
}

.sudoku-cell.highlight-axis {
  background: rgba(0, 240, 255, 0.05);
}

.sudoku-cell.highlight-match {
  background: rgba(0, 240, 255, 0.15);
  box-shadow: inset 0 0 8px rgba(0, 240, 255, 0.3);
}

.sudoku-cell.selected {
  background: rgba(189, 0, 255, 0.25) !important;
  box-shadow: inset 0 0 12px var(--neon-purple);
  outline: 2px solid var(--neon-purple);
  outline-offset: -2px;
  z-index: 5;
}

.sudoku-cell.revealed-solution {
  color: var(--neon-purple) !important;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(189, 0, 255, 0.8) !important;
  background: rgba(189, 0, 255, 0.08) !important;
}

.sudoku-cell.conflict {
  background: rgba(255, 0, 85, 0.15) !important;
  border-color: var(--neon-magenta) !important;
  box-shadow: inset 0 0 10px rgba(255, 0, 85, 0.5) !important;
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* Draft / Notes Sub-grid */
.cell-notes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  padding: 3px;
  pointer-events: none;
}

.note-number {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--neon-purple);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0.8;
}

/* Right Column - Controls */
.controls-column {
  flex: 1;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* Panels */
.control-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 15px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.3s ease;
}

.control-panel:hover {
  border-color: rgba(0, 240, 255, 0.35);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  padding-bottom: 6px;
}

.panel-tag {
  font-family: var(--font-title);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* Difficulty Deck */
.difficulty-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.diff-btn {
  background: rgba(12, 12, 24, 0.6);
  border: 1px solid rgba(189, 0, 255, 0.3);
  color: var(--text-muted);
  font-family: var(--font-title);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 8px 4px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.diff-btn:hover {
  border-color: var(--neon-purple);
  color: #fff;
  box-shadow: 0 0 8px rgba(189, 0, 255, 0.3);
}

.diff-btn.active {
  background: rgba(189, 0, 255, 0.15);
  border-color: var(--neon-purple);
  color: var(--neon-purple);
  text-shadow: 0 0 6px var(--neon-purple);
  box-shadow: inset 0 0 6px rgba(189, 0, 255, 0.3), 0 0 8px rgba(189, 0, 255, 0.2);
}

/* Buttons Styling */
.cyber-btn {
  background: rgba(12, 12, 24, 0.8);
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 1px;
  padding: 12px 20px;
  cursor: pointer;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.cyber-btn.primary-glowing {
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.cyber-btn.primary-glowing:hover {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
  transform: scale(1.02);
}

.cyber-btn.accent-magenta {
  border-color: var(--neon-magenta);
  color: var(--neon-magenta);
  box-shadow: 0 0 15px rgba(255, 0, 85, 0.1);
}

.cyber-btn.accent-magenta:hover {
  background: var(--neon-magenta);
  color: #fff;
  box-shadow: 0 0 25px rgba(255, 0, 85, 0.5);
  transform: scale(1.02);
}

.cyber-btn.accent-purple {
  border-color: var(--neon-purple);
  color: var(--neon-purple);
  box-shadow: 0 0 15px rgba(189, 0, 255, 0.1);
}

.cyber-btn.accent-purple:hover {
  background: var(--neon-purple);
  color: #fff;
  box-shadow: 0 0 25px rgba(189, 0, 255, 0.5);
  transform: scale(1.02);
}

.cyber-btn.accent-cyan {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
}

.cyber-btn.accent-cyan:hover {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
  transform: scale(1.02);
}

.cyber-btn.accent-orange {
  border-color: var(--neon-orange);
  color: var(--neon-orange);
  box-shadow: 0 0 15px rgba(255, 157, 0, 0.1);
}

.cyber-btn.accent-orange:hover {
  background: var(--neon-orange);
  color: #000;
  box-shadow: 0 0 25px rgba(255, 157, 0, 0.5);
  transform: scale(1.02);
}

.cyber-btn:active {
  transform: scale(0.99);
}

.btn-decoration {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 6px;
  height: 6px;
  background: inherit;
  border-left: 1px solid currentColor;
  border-top: 1px solid currentColor;
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}

/* Tools Dashboard */
.tool-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.tool-btn {
  background: rgba(12, 12, 24, 0.6);
  border: 1px solid rgba(0, 240, 255, 0.2);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 8px 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  position: relative;
}

.tool-btn span {
  font-family: var(--font-title);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.tool-icon {
  width: 20px;
  height: 20px;
  color: var(--neon-cyan);
}

.tool-btn:hover {
  border-color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.05);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.tool-btn.active {
  background: rgba(189, 0, 255, 0.15);
  border-color: var(--neon-purple);
  box-shadow: 0 0 10px rgba(189, 0, 255, 0.25);
}

.tool-btn.active .tool-icon {
  color: var(--neon-purple);
}

/* Notes state indicator dot */
.note-status-indicator {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
}

.tool-btn.active .note-status-indicator {
  background: var(--neon-purple);
  box-shadow: 0 0 6px var(--neon-purple);
}

/* Input deck / Keypad */
.keypad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.key-btn {
  background: rgba(16, 16, 32, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--text-primary);
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  padding: 12px 0;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.15s ease;
  box-shadow: inset 0 0 8px rgba(0, 240, 255, 0.03);
}

.key-btn:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3), inset 0 0 8px rgba(0, 240, 255, 0.1);
  transform: translateY(-1px);
}

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

.keypad-actions {
  margin-top: 5px;
}

.key-action-btn {
  width: 100%;
  background: rgba(30, 10, 20, 0.8);
  border: 1px solid rgba(255, 0, 85, 0.3);
  color: var(--neon-magenta);
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 0;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
  letter-spacing: 1px;
}

.key-action-btn:hover {
  background: var(--neon-magenta);
  color: #fff;
  box-shadow: 0 0 18px rgba(255, 0, 85, 0.4);
}

/* System Action Footer layout */
.system-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

/* Modals Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(3, 3, 6, 0.85);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 1;
  transition: opacity 0.25s ease;
}

/* Cyber Modal Panel */
.cyber-modal {
  background: rgba(12, 12, 28, 0.92);
  border: 2px solid var(--neon-cyan);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.3);
  border-radius: 8px;
  padding: 25px;
  width: 90%;
  max-width: 480px;
  position: relative;
  animation: modalSlide 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.slots-modal-width {
  max-width: 600px;
}

.help-modal-width {
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
}

@keyframes modalSlide {
  from { transform: scale(0.92) translateY(15px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

/* Tech Modal Corners decoration */
.modal-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--neon-purple);
  pointer-events: none;
}
.modal-corner.TL { top: -2px; left: -2px; border-right: none; border-bottom: none; }
.modal-corner.TR { top: -2px; right: -2px; border-left: none; border-bottom: none; }
.modal-corner.BL { bottom: -2px; left: -2px; border-right: none; border-top: none; }
.modal-corner.BR { bottom: -2px; right: -2px; border-left: none; border-top: none; }

.modal-header {
  border-bottom: 2px solid var(--neon-cyan);
  padding-bottom: 12px;
  margin-bottom: 20px;
  position: relative;
}

.modal-title {
  font-family: var(--font-title);
  font-size: 1.4rem;
  color: #fff;
  text-shadow: 0 0 8px var(--neon-cyan);
  letter-spacing: 1px;
}

.modal-subtitle {
  font-family: var(--font-title);
  font-size: 0.65rem;
  color: var(--neon-purple);
  font-weight: 700;
  display: block;
  margin-top: 4px;
}

.close-btn {
  position: absolute;
  top: -5px;
  right: 0;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease;
}

.close-btn:hover {
  color: var(--neon-magenta);
}

.modal-body {
  margin-bottom: 25px;
  line-height: 1.6;
  font-size: 0.95rem;
}

.modal-body p {
  margin-bottom: 15px;
}

.cyber-details-panel {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(0, 240, 255, 0.15);
  border-radius: 6px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 15px;
  font-family: var(--font-title);
  font-size: 0.9rem;
}

.cyber-details-panel .label {
  color: var(--text-muted);
  margin-right: 8px;
}

.cyber-details-panel .val {
  color: var(--neon-cyan);
  font-weight: 700;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.4);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 15px;
}

.justify-center {
  justify-content: center;
}

/* Save Slots UI elements */
.slots-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.slot-card {
  display: flex;
  background: rgba(18, 18, 36, 0.7);
  border: 1px solid rgba(0, 240, 255, 0.15);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.25s ease;
  align-items: center;
}

.slot-card:hover {
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
}

.slot-number {
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 700;
  color: #000;
  background: var(--neon-cyan);
  padding: 15px 12px;
  writing-mode: vertical-lr;
  transform: rotate(180deg);
  text-align: center;
  letter-spacing: 1px;
}

.slot-card[data-slot="2"] .slot-number {
  background: var(--neon-purple);
}

.slot-card[data-slot="3"] .slot-number {
  background: var(--neon-magenta);
  color: #fff;
}

.slot-content {
  flex: 1;
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.slot-empty-text {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.85rem;
}

.slot-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 6px;
}

.slot-diff {
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

.slot-card[data-slot="2"] .slot-diff {
  color: var(--neon-purple);
  background: rgba(189, 0, 255, 0.1);
}

.slot-card[data-slot="3"] .slot-diff {
  color: var(--neon-magenta);
  background: rgba(255, 0, 85, 0.1);
}

.slot-time {
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
}

.slot-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.slot-actions {
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.slot-actions button {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--neon-cyan);
  font-family: var(--font-title);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.5px;
}

.slot-actions button:hover:not(:disabled) {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.slot-actions .slot-load-btn {
  border-color: rgba(189, 0, 255, 0.3);
  color: var(--neon-purple);
}

.slot-actions .slot-load-btn:hover:not(:disabled) {
  background: var(--neon-purple);
  color: #fff;
  box-shadow: 0 0 10px rgba(189, 0, 255, 0.4);
}

.slot-actions button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Win screen specific styles */
.win-modal-style {
  max-width: 500px;
  border-color: var(--neon-green);
  box-shadow: 0 0 45px rgba(57, 255, 20, 0.3);
}

.win-modal-style .modal-title {
  text-shadow: 0 0 10px var(--neon-green);
}

.win-modal-style .modal-subtitle {
  color: var(--neon-cyan);
}

.congrats-message {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 20px !important;
}

.flash-text {
  animation: flash 1s infinite alternate;
}

@keyframes flash {
  0% { opacity: 0.8; }
  100% { opacity: 1; text-shadow: 0 0 15px var(--neon-green), 0 0 25px var(--neon-green); }
}

.text-center {
  text-align: center;
}

.stats-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 10px;
}

.summary-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(57, 255, 20, 0.2);
  padding: 15px 5px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.summary-label {
  font-family: var(--font-title);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.summary-value {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: 0 0 6px rgba(57, 255, 20, 0.3);
}

/* Help protocols styles */
.help-section {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 15px;
  margin-bottom: 15px;
}

.help-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.help-section h3 {
  font-family: var(--font-title);
  color: var(--neon-cyan);
  font-size: 0.95rem;
  margin-bottom: 8px;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.2);
}

.help-section p {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 8px !important;
}

.help-section ul {
  padding-left: 18px;
}

.help-section li {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 5px;
}

.help-section li strong {
  color: var(--neon-purple);
}

/* Responsive Scaling */
@media (max-width: 900px) {
  .main-layout {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .board-column {
    width: 100%;
  }

  .controls-column {
    width: 100%;
    max-width: 540px;
  }
}

@media (max-width: 500px) {
  .app-container {
    padding: 10px;
    gap: 15px;
  }

  .glitch-text {
    font-size: 1.6rem;
  }

  .sub-logo {
    font-size: 0.7rem;
  }

  .stat-value {
    font-size: 1rem;
  }

  .sudoku-cell {
    font-size: 1.3rem;
  }

  .note-number {
    font-size: 0.5rem;
  }

  .key-btn {
    font-size: 1.25rem;
    padding: 8px 0;
  }

  .cyber-btn {
    padding: 10px 15px;
    font-size: 0.8rem;
  }

  .cyber-modal {
    padding: 20px 15px;
  }

  .modal-title {
    font-size: 1.15rem;
  }

  .slot-card {
    flex-direction: column;
    align-items: stretch;
  }

  .slot-number {
    writing-mode: horizontal-tb;
    transform: none;
    padding: 6px 12px;
  }

  .slot-actions {
    flex-direction: row;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }

  .slot-actions button {
    flex: 1;
    text-align: center;
  }

  .stats-summary {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .summary-box {
    flex-direction: row;
    justify-content: space-between;
    padding: 10px 15px;
  }

  .summary-label {
    margin-bottom: 0;
  }
}

/* Premium Upgrade Feature Styles */
#premium-stat-box {
  cursor: pointer;
  transition: all 0.3s ease;
}

#premium-stat-box:hover {
  border-color: var(--neon-orange);
  box-shadow: 0 0 12px rgba(255, 157, 0, 0.45);
}

#premium-stat-box.premium-active {
  border-color: var(--neon-orange);
  background: rgba(255, 157, 0, 0.08);
}

.premium-benefits {
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 157, 0, 0.05);
  border: 1px solid rgba(255, 157, 0, 0.15);
  padding: 10px 15px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.benefit-item:hover {
  background: rgba(255, 157, 0, 0.08);
  border-color: rgba(255, 157, 0, 0.35);
  box-shadow: 0 0 8px rgba(255, 157, 0, 0.15);
}

.benefit-icon {
  color: var(--neon-orange);
  font-weight: bold;
  font-size: 1.1rem;
}

.benefit-text {
  font-size: 0.9rem;
  color: var(--text-primary);
}