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

:root {
  --card-width: 78px;
  --card-height: 110px;
  --card-spacing: 5px;
  --card-border-radius: 8px;
  --card-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.3);
  --primary-color: #1a5f3f;
  --secondary-color: #2d8659;
  --bg-color: #0d4a2e;
  --surface-color: #ffffff;
  --text-color: #333333;
  --text-light: #ffffff;
  --red-suit: #d32f2f;
  --black-suit: #212121;
  --highlight-color: #ffd700;
  --hint-glow: 0 0 15px rgba(255, 215, 0, 0.8);
  /* Unified spacing system */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--bg-color) 0%, #0a3d26 100%);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  overflow-x: auto;
  overflow-y: auto;
  box-sizing: border-box;
}

.game-container {
  width: 670px;
  max-width: 670px;
  min-width: 670px;
  min-height: 700px;
  height: 700px;
  max-height: 700px;
  padding: var(--spacing-md);
  padding-top: 16px; /* Increased top padding to allow cards to lift without clipping */
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  overflow-x: visible;
  overflow-y: visible; /* Changed from auto to visible to allow content to expand */
  box-sizing: border-box;
  flex-shrink: 0; /* Prevent container from shrinking */
  position: relative; /* Ensure fixed positioning context */
}

.game-header {
  width: calc(100% - var(--spacing-lg) - 10px);
  max-width: calc(100% - var(--spacing-lg) - 10px);
  min-width: calc(100% - var(--spacing-lg) - 10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  margin-left: var(--spacing-lg);
  flex-wrap: nowrap;
  gap: var(--spacing-md);
  box-sizing: border-box;
}

.game-title {
  font-size: 1.75rem;
  color: var(--text-light);
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  line-height: 1.2;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.controls {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  flex-wrap: nowrap;
}

.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  flex-shrink: 0;
  box-sizing: border-box;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-light);
}

.btn-primary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

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

.btn-primary.no-moves-available {
  animation: noMovesPulse 2s ease-in-out infinite;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
  border: 2px solid var(--highlight-color);
}

@keyframes noMovesPulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 30px rgba(255, 215, 0, 1);
    transform: scale(1.05);
  }
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--text-light);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

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

.btn-mode {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--text-light);
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.btn-mode:hover {
  background-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

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

.game-stats {
  width: calc(100% - var(--spacing-lg) - 10px);
  max-width: calc(100% - var(--spacing-lg) - 10px);
  min-width: calc(100% - var(--spacing-lg) - 10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  margin-left: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  box-sizing: border-box;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-light);
  font-size: 0.9rem;
}

.stat-label {
  font-weight: 600;
}

.stat-value {
  font-weight: 700;
  font-size: 1.1rem;
}

.status-message {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  flex: 1;
  text-align: right;
}

.game-board {
  width: calc(100% - var(--spacing-lg));
  max-width: calc(100% - var(--spacing-lg));
  min-width: calc(100% - var(--spacing-lg));
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  min-height: 0;
  flex-grow: 1; /* Allow game board to grow and use available space */
  padding: 12px 0 0 0; /* Add top padding to allow cards to lift without clipping */
  margin: 0;
  margin-left: var(--spacing-lg);
  box-sizing: border-box;
  overflow: visible; /* Allow content to expand beyond container */
}

.top-row {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  gap: var(--spacing-md);
  flex-wrap: nowrap;
  margin-bottom: 0;
  width: 100%;
}

.stock-area {
  flex-shrink: 0;
  order: 1;
  width: var(--card-width);
}

.waste-area {
  flex-shrink: 0;
  order: 2;
  width: var(--card-width);
}

.foundations-area {
  display: flex;
  gap: var(--spacing-md);
  flex-shrink: 0;
  order: 3;
  /* Align first foundation slightly right of 4th tableau column for better visual balance */
  /* Stock + Waste + gaps = 2 × 78px + 2 × 12px = 180px */
  /* First 3 tableau columns + gaps + additional gap = 3 × 78px + 3 × 12px = 270px */
  /* Margin needed: 270px - 180px = 90px */
  margin-left: calc(3 * var(--card-width) + 3 * var(--spacing-md) - 2 * var(--card-width) - 2 * var(--spacing-md));
  width: auto;
}


.pile {
  position: relative;
  width: var(--card-width);
  height: var(--card-height);
  border-radius: var(--card-border-radius);
  transition: transform 0.2s ease;
}

.pile:focus {
  outline: 2px solid var(--highlight-color);
  outline-offset: 2px;
}

.stock-pile,
.waste-pile,
.foundation-pile {
  border: 2px dashed rgba(255, 255, 255, 0.25);
  background-color: rgba(255, 255, 255, 0.03);
  min-height: var(--card-height);
  position: relative;
}

.foundation-pile[data-empty="true"]::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(var(--card-width) - 12px);
  height: calc(var(--card-height) - 12px);
  border: 2px dashed rgba(180, 180, 180, 0.5);
  border-radius: var(--card-border-radius);
  pointer-events: none;
  z-index: 0;
}

.foundation-pile:not([data-empty])::before {
  display: none;
}

.waste-pile {
  position: relative;
}

.waste-pile[data-empty="true"]::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(var(--card-width) - 12px);
  height: calc(var(--card-height) - 12px);
  border: 2px dashed rgba(180, 180, 180, 0.5);
  border-radius: var(--card-border-radius);
  pointer-events: none;
  z-index: 0;
}

.waste-pile:not([data-empty])::before {
  display: none;
}

.foundation-pile {
  position: relative;
}

.waste-pile .card,
.foundation-pile .card {
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
}

.stock-pile:hover .card-back,
.waste-pile:hover .card,
.foundation-pile:hover .card {
  transform: translateY(-2px);
}

.stock-pile:hover,
.waste-pile:hover,
.foundation-pile:hover {
  border-color: rgba(255, 255, 255, 0.4);
}

.stock-pile:hover,
.waste-pile:hover,
.foundation-pile:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.card-back {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
  border-radius: var(--card-border-radius);
  border: 2px solid rgba(255, 255, 255, 0.25);
  box-shadow: var(--card-shadow);
  position: relative;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-back::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('pixelpoint-logo-small-light.svg');
  background-size: 75% auto;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.9;
  pointer-events: none;
}

.card-back:hover {
  transform: scale(1.05);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(255, 255, 255, 0.4);
}

.stock-pile:focus .card-back,
.stock-pile:hover .card-back {
  transform: scale(1.05);
  box-shadow: var(--card-shadow-hover);
}

.card {
  position: absolute;
  width: var(--card-width);
  height: var(--card-height);
  background-color: var(--surface-color);
  border-radius: var(--card-border-radius);
  border: 2px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--card-shadow);
  cursor: pointer;
  user-select: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 7px;
  font-weight: 700;
  font-size: 0.9rem;
  will-change: transform;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  z-index: 100;
}

.card.face-down:hover {
  z-index: 1 !important; /* Keep face-down cards at low z-index even on hover */
  transform: none; /* No lift effect for face-down cards - more natural */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3); /* Subtle shadow change only */
}

.card.selected {
  transform: translateY(-8px) scale(1.05);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
  border: 3px solid var(--highlight-color);
  z-index: 200;
}

.pile.selected-pile {
  border: 2px solid var(--highlight-color);
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  background-color: rgba(255, 215, 0, 0.05);
}

.foundation-pile.ace-target {
  border: 2px solid var(--highlight-color);
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.8);
  background-color: rgba(255, 215, 0, 0.15);
  animation: acePulse 1.5s ease-in-out infinite;
}

@keyframes acePulse {
  0%, 100% {
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.8);
    background-color: rgba(255, 215, 0, 0.15);
  }
  50% {
    box-shadow: 0 0 25px rgba(255, 215, 0, 1);
    background-color: rgba(255, 215, 0, 0.25);
  }
}

.card.dragging {
  opacity: 0.5;
  cursor: grabbing;
  z-index: 1000;
}

.card[draggable="true"] {
  cursor: grab;
}

.card[draggable="true"]:active {
  cursor: grabbing;
}

.card.hint-highlight {
  animation: hintPulse 1s ease-in-out infinite;
  box-shadow: var(--hint-glow);
}

@keyframes hintPulse {
  0%, 100% {
    box-shadow: var(--hint-glow);
  }
  50% {
    box-shadow: 0 0 25px rgba(255, 215, 0, 1);
  }
}

.card.face-down {
  background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
  border: 2px solid rgba(255, 255, 255, 0.25);
  cursor: pointer;
  position: relative;
}

.card.face-down .card-rank,
.card.face-down .card-suit,
.card.face-down .card-rank-bottom {
  display: none;
}

.card.face-down::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('pixelpoint-logo-small-light.svg');
  background-size: 75% auto;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.9;
  pointer-events: none;
}

.card.red {
  color: var(--red-suit);
}

.card.black {
  color: var(--black-suit);
}

.card-rank {
  font-size: 1.1rem;
  line-height: 1;
}

.card-suit {
  font-size: 1.4rem;
  line-height: 1;
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-rank-bottom {
  font-size: 1.1rem;
  line-height: 1;
  transform: rotate(180deg);
  text-align: left;
  margin-left: auto;
}

.tableau-area {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-start;
  flex-wrap: nowrap;
  margin-top: 0;
  align-items: flex-start;
  width: 100%;
  overflow-x: auto;
  overflow-y: visible; /* Allow cards to expand vertically */
  flex-grow: 1; /* Allow tableau area to grow and use available space */
  padding-top: 12px; /* Add top padding to allow cards to lift without clipping */
}

.tableau-column {
  width: var(--card-width);
  flex-shrink: 0;
  position: relative;
  /* Tallest column has 7 cards: last card at top: 6*20px = 120px + card height 110px = 230px */
  min-height: calc(var(--card-height) + 6 * 20px);
  padding: 12px 0 0 0; /* Add top padding to allow cards to lift without clipping */
  margin: 0;
  overflow: visible; /* Allow cards to lift above column bounds on hover */
}

.tableau-column .card {
  position: absolute;
  left: 0;
  transition: top 0.3s ease;
}

.tableau-column .card:not(.face-down) {
  z-index: 10;
}

.tableau-column .card:not(.face-down):hover {
  z-index: 100; /* Higher z-index to ensure card appears above all others and doesn't get clipped */
}

.tableau-column .card.face-down {
  z-index: 1; /* Lower z-index for face-down cards */
}

.tableau-column .card.face-down:hover {
  z-index: 1 !important; /* Keep same z-index on hover - don't lift above other cards */
  transform: none; /* No transform - keep natural stacking */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3); /* Subtle shadow enhancement only */
}

.tableau-column.drop-zone {
  /* Remove full column highlighting */
  border: none;
  background-color: transparent;
  box-shadow: none;
}

.tableau-column.drop-zone::before {
  content: '';
  position: absolute;
  bottom: 0; /* Position at the bottom of the column */
  left: 0;
  right: 0;
  height: calc(var(--card-height) + 4px); /* Height of one card + small margin */
  border: 2px dashed var(--highlight-color);
  border-radius: var(--card-border-radius);
  background-color: rgba(255, 215, 0, 0.05);
  pointer-events: none;
  z-index: 50;
}

.foundation-pile.drop-zone {
  border: 2px solid var(--highlight-color);
  background-color: rgba(255, 215, 0, 0.1);
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal[aria-hidden="false"] {
  display: flex;
}

.modal-content {
  background-color: var(--surface-color);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  text-align: center;
  max-width: 90%;
  max-width: 400px;
}

.modal-content h2 {
  color: var(--primary-color);
  margin-bottom: 15px;
  font-size: 2rem;
}

.modal-content p {
  margin-bottom: 10px;
  color: var(--text-color);
  font-size: 1.1rem;
}

.final-stats {
  font-weight: 600;
  color: var(--secondary-color);
  margin: 15px 0;
}

/* Animations */
@keyframes cardFlip {
  0% {
    transform: rotateY(0deg);
  }
  50% {
    transform: rotateY(90deg);
  }
  100% {
    transform: rotateY(0deg);
  }
}

.card.flipping {
  animation: cardFlip 0.4s ease-in-out;
}

@keyframes cardMove {
  from {
    opacity: 0.8;
  }
  to {
    opacity: 1;
  }
}

.card.moving {
  animation: cardMove 0.3s ease-in-out;
}

/* Responsive Design - Disabled to maintain fixed game size */
/* Game container and UI elements maintain fixed size regardless of viewport */
@media (max-width: 500px) {
  /* Keep game container fixed size - no changes */
  .game-container {
    width: 670px !important;
    max-width: 670px !important;
    min-width: 670px !important;
    height: 700px !important;
    max-height: 700px !important;
    min-height: 700px !important;
  }
}

@media (max-width: 450px) {
  /* Keep game container fixed size - no changes */
  .game-container {
    width: 670px !important;
    max-width: 670px !important;
    min-width: 670px !important;
    height: 700px !important;
    max-height: 700px !important;
    min-height: 700px !important;
  }
}

@media (max-width: 380px) {
  /* Keep game container fixed size - no changes */
  .game-container {
    width: 670px !important;
    max-width: 670px !important;
    min-width: 670px !important;
    height: 700px !important;
    max-height: 700px !important;
    min-height: 700px !important;
  }
}

/* Touch-friendly adjustments */
@media (hover: none) and (pointer: coarse) {
  .card:hover {
    transform: none;
  }

  .card.selected {
    transform: translateY(-4px) scale(1.02);
  }

  .btn {
    min-height: 44px;
    min-width: 44px;
  }
}