/* ==========================================================================
   CSS Reset & Google Fonts Integration
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Font Families */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Card Sizing (Dynamic & Scalable) */
  --card-width: 90px;
  --card-height: calc(var(--card-width) * 1.4);
  --card-border-radius: 8px;
  --card-gap: 15px;

  /* Tableau Card Overlaps */
  --overlap-face-down: 14px;
  --overlap-face-up: 28px;

  /* Game Board Sizing */
  --board-max-width: 820px;

  /* UI Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Screen Size Sizing Adaptations */
@media (max-width: 768px) {
  :root {
    --card-width: 75px;
    --card-gap: 10px;
    --overlap-face-up: 22px;
  }
}

@media (max-width: 580px) {
  :root {
    --card-width: 54px;
    --card-gap: 6px;
    --overlap-face-up: 16px;
    --overlap-face-down: 10px;
  }
}

/* ==========================================================================
   Themes
   ========================================================================== */
body.theme-emerald {
  --bg-gradient: linear-gradient(135deg, #0e3020 0%, #061b11 100%);
  --glow-color-1: rgba(16, 185, 129, 0.15);
  --glow-color-2: rgba(4, 120, 87, 0.1);
  --glass-bg: rgba(6, 30, 20, 0.4);
  --glass-border: rgba(16, 185, 129, 0.15);
  --accent-color: #10b981;
  --accent-hover: #34d399;
  --panel-text: #e6f4ea;
  --card-back-color: #0b5133;
  --card-back-accent: #0f8252;
  --card-back-pattern: radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%),
                          radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%);
}

body.theme-midnight {
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #020617 100%);
  --glow-color-1: rgba(59, 130, 246, 0.15);
  --glow-color-2: rgba(29, 78, 216, 0.1);
  --glass-bg: rgba(15, 23, 42, 0.5);
  --glass-border: rgba(59, 130, 246, 0.2);
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --panel-text: #f1f5f9;
  --card-back-color: #1e3a8a;
  --card-back-accent: #3b82f6;
  --card-back-pattern: radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%),
                          radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%);
}

body.theme-charcoal {
  --bg-gradient: linear-gradient(135deg, #202023 0%, #111112 100%);
  --glow-color-1: rgba(243, 244, 246, 0.05);
  --glow-color-2: rgba(107, 114, 128, 0.1);
  --glass-bg: rgba(30, 30, 32, 0.5);
  --glass-border: rgba(255, 255, 255, 0.08);
  --accent-color: #a1a1aa;
  --accent-hover: #e4e4e7;
  --panel-text: #f4f4f5;
  --card-back-color: #27272a;
  --card-back-accent: #52525b;
  --card-back-pattern: radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%),
                          radial-gradient(circle, var(--card-back-accent) 20%, transparent 20%);
}

/* ==========================================================================
   Base Styles & Ambient Glows
   ========================================================================== */
body {
  font-family: var(--font-body);
  background: var(--bg-gradient);
  color: #fff;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background-color: var(--glow-color-1);
  top: -100px;
  left: 10%;
}

.glow-2 {
  width: 600px;
  height: 600px;
  background-color: var(--glow-color-2);
  bottom: -150px;
  right: 10%;
}

/* ==========================================================================
   Game Layout Container
   ========================================================================== */
.game-container {
  width: 100%;
  max-width: var(--board-max-width);
  min-height: 100vh;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .game-container {
    padding: 12px 8px;
    gap: 16px;
  }
}

/* ==========================================================================
   Header & Stats Bar
   ========================================================================== */
.game-header {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 16px;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-hover);
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.stats-bar {
  display: flex;
  gap: 12px;
}

.stat-box {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 6px 14px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 76px;
}

.stat-label {
  font-size: 9px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.8px;
  margin-bottom: 2px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--panel-text);
}

.header-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.action-btn:hover:not(:disabled) {
  background: var(--accent-color);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.action-btn:active:not(:disabled) {
  transform: translateY(0);
}

.action-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.action-btn .icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

@media (max-width: 768px) {
  .game-header {
    padding: 10px 14px;
  }
  .logo {
    font-size: 18px;
  }
  .badge {
    display: none;
  }
  .stat-box {
    padding: 4px 8px;
    min-width: 58px;
  }
  .stat-value {
    font-size: 13px;
  }
  .action-btn {
    width: 32px;
    height: 32px;
  }
  .action-btn .icon {
    width: 14px;
    height: 14px;
  }
}

/* ==========================================================================
   Game Board Layout (Upper & Lower Rows)
   ========================================================================== */
.game-board {
  display: flex;
  flex-direction: column;
  gap: var(--card-gap);
  flex-grow: 1;
}

.upper-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 100%;
}

.deck-area {
  display: flex;
  gap: var(--card-gap);
}

.foundations-area {
  display: flex;
  gap: var(--card-gap);
}

.tableau-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--card-gap);
  width: 100%;
  align-items: flex-start;
}

/* Pile Container & Pile Slots */
.pile-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.pile-label {
  font-size: 9px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.2);
  letter-spacing: 0.5px;
  user-select: none;
  pointer-events: none;
  text-transform: uppercase;
}

.pile {
  width: var(--card-width);
  height: var(--card-height);
  border-radius: var(--card-border-radius);
  position: relative;
  background: rgba(0, 0, 0, 0.2);
  border: 2px dashed rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
  display: flex;
  justify-content: center;
  align-items: center;
}

.pile.highlight-drag {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 0 15px var(--glow-color-1);
}

.suit-placeholder {
  font-size: 32px;
  color: rgba(255, 255, 255, 0.05);
  user-select: none;
  pointer-events: none;
  font-family: var(--font-display);
}

@media (max-width: 580px) {
  .suit-placeholder {
    font-size: 20px;
  }
}

/* ==========================================================================
   Card Styling & 3D Flipping
   ========================================================================== */
.card {
  width: var(--card-width);
  height: var(--card-height);
  position: absolute;
  perspective: 1000px;
  cursor: grab;
  user-select: none;
  touch-action: none;
  transition: transform var(--transition-fast);
}

.card:active {
  cursor: grabbing;
}

/* Inner face container */
.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.15);
  border-radius: var(--card-border-radius);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

/* When card is face up, rotate it */
.card.face-up .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--card-border-radius);
  border: 1px solid rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

/* CARD BACK */
.card-back {
  background-color: var(--card-back-color);
  background-image: var(--card-back-pattern);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
  border: 2px solid #fff;
}

.card-back::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(255, 255, 255, 0.3);
  border-radius: calc(var(--card-border-radius) - 4px);
  pointer-events: none;
}

/* CARD FRONT */
.card-front {
  background-color: #fcfcf9; /* Premium ivory tint */
  color: #1a1a1a;
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6px 8px;
}

@media (max-width: 580px) {
  .card-front {
    padding: 3px 4px;
  }
}

/* Red suit overrides */
.card[data-suit="hearts"] .card-front,
.card[data-suit="diamonds"] .card-front {
  color: #d93838;
}

.card[data-suit="spades"] .card-front,
.card[data-suit="clubs"] .card-front {
  color: #1e293b;
}

/* Top Corner Label */
.card-corner {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
}

.card-corner .corner-suit {
  font-size: 12px;
  margin-top: 1px;
}

@media (max-width: 580px) {
  .card-corner {
    font-size: 11px;
  }
  .card-corner .corner-suit {
    font-size: 9px;
  }
}

/* Center Large Suit Symbol */
.card-center-suit {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  pointer-events: none;
  user-select: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card-center-suit svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

@media (max-width: 580px) {
  .card-center-suit svg {
    width: 18px;
    height: 18px;
  }
}

/* Face Card Center Graphics */
.card-face-graphic {
  position: absolute;
  inset: 15%;
  opacity: 0.08; /* Subtle watermark */
  pointer-events: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card-face-graphic svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

/* States */
.card.dragging {
  opacity: 0.5;
  z-index: 1000 !important;
}

.card.drag-clone {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  transform: rotate(2deg) scale(1.05);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
  transition: none !important;
}

.card.drag-clone .card-inner {
  transform: rotateY(180deg) !important;
  transition: none !important;
}

/* Selection and valid target cues */
.card.selected .card-inner {
  box-shadow: 0 0 12px var(--accent-color);
  transform: scale(1.02);
}

/* Tableau Stacking Overlap Offsets */
.tableau-pile .card {
  position: absolute;
  /* Top position will be calculated inline via JS */
}

/* Waste Pile Fan Stack */
.waste-pile .card {
  /* JS will arrange the last 3 face-up cards fan-styled */
}

/* ==========================================================================
   Solve / Autocomplete Bar
   ========================================================================== */
.autocomplete-bar {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 12px;
  padding: 12px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
  transform: translateY(0);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.autocomplete-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  gap: 16px;
  font-weight: 500;
}

.autocomplete-bar.hidden {
  transform: translateY(30px);
  opacity: 0;
  pointer-events: none;
}

/* ==========================================================================
   Modals & Dialogs (Glassmorphism Overlay)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  background: rgba(18, 30, 24, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border-radius: 20px;
  width: 90%;
  max-width: 440px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(1);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.15);
}

.modal-overlay.hidden .modal-card {
  transform: scale(0.9);
}

/* Theme body variant changes for modal bg */
body.theme-midnight .modal-card {
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(59, 130, 246, 0.2);
}

body.theme-charcoal .modal-card {
  background: rgba(30, 30, 32, 0.9);
  border-color: rgba(255, 255, 255, 0.08);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: rgba(255, 255, 255, 0.4);
}

/* Toggle Buttons */
.toggle-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: rgba(0, 0, 0, 0.25);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.toggle-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  padding: 8px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.toggle-btn.active {
  background: var(--accent-color);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Theme Selection Grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.theme-select-btn {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.7);
  padding: 10px 6px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  transition: var(--transition-fast);
}

.theme-select-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.theme-select-btn.active {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  box-shadow: 0 0 10px var(--glow-color-1);
}

.theme-preview {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.bg-emerald { background: linear-gradient(135deg, #0e3020 0%, #10b981 100%); }
.bg-midnight { background: linear-gradient(135deg, #0f172a 0%, #3b82f6 100%); }
.bg-charcoal { background: linear-gradient(135deg, #202023 0%, #71717a 100%); }

/* Toggle Row & Switches */
.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.3);
  transition: .3s;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.slider::before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
}

input:checked + .slider {
  background-color: var(--accent-color);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--accent-color);
}

input:checked + .slider::before {
  transform: translateX(20px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round::before {
  border-radius: 50%;
}

/* Modal Footer & Buttons */
.modal-footer {
  padding: 16px 24px;
  background: rgba(0, 0, 0, 0.15);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.btn {
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary {
  background: var(--accent-color);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(217, 56, 56, 0.15);
  border: 1px solid rgba(217, 56, 56, 0.3);
  color: #fca5a5;
}

.btn-danger:hover {
  background: rgba(217, 56, 56, 0.3);
  color: #fff;
}

/* Victory Screen Specific */
.victory-card {
  max-width: 400px;
  text-align: center;
}

.victory-header {
  padding: 32px 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.trophy-wrapper {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.1);
  border: 1.5px solid rgba(245, 158, 11, 0.3);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #f59e0b;
  animation: float 3s ease-in-out infinite;
}

.trophy-icon {
  width: 36px;
  height: 36px;
  fill: currentColor;
}

.victory-header h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fcd34d 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.victory-header p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.victory-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 0 24px 24px;
}

.v-stat-box {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 12px 8px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.v-stat-box .label {
  font-size: 9px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.5px;
}

.v-stat-box .value {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.btn-large {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  border-radius: 10px;
}

/* ==========================================================================
   Victory Bouncing Card Canvas
   ========================================================================== */
#victory-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999; /* below overlay, above board */
  display: none;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
  100% { transform: translateY(0px); }
}

/* Custom Drag Image Container */
.drag-container {
  position: fixed;
  top: -1000px;
  left: -1000px;
  pointer-events: none;
  z-index: 9999;
}