/**
 * Klondike Solitaire - Styles
 * Premium mobile-first design
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Colors */
  --color-felt: #1a472a;
  --color-felt-dark: #0d2818;
  --color-felt-light: #2d5a3d;
  --color-gold: #c9a227;
  --color-gold-light: #f4d03f;

  --color-card-white: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-red: #c41e3a;
  --color-black: #1a1a1a;

  --color-text: #ffffff;
  --color-text-muted: rgba(255, 255, 255, 0.7);

  /* Card dimensions - responsive */
  --card-width: min(12vw, 70px);
  --card-height: calc(var(--card-width) * 1.4);
  --card-radius: calc(var(--card-width) * 0.08);
  --card-gap: calc(var(--card-width) * 0.1);

  /* Tableau card overlap */
  --tableau-overlap-facedown: calc(var(--card-height) * 0.1);
  --tableau-overlap-faceup: calc(var(--card-height) * 0.2);

  /* Spacing */
  --header-height: 50px;
  --pile-gap: calc(var(--card-width) * 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
  --transition-slow: 0.4s ease-out;

  /* Z-indices */
  --z-cards: 1;
  --z-drag: 100;
  --z-modal: 200;
  --z-banner: 150;

  /* Safe areas for notched phones */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
}

/* Larger cards on bigger screens */
@media (min-width: 500px) {
  :root {
    --card-width: min(11vw, 80px);
  }
}

@media (min-width: 768px) {
  :root {
    --card-width: min(9vw, 90px);
  }
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, var(--color-felt) 0%, var(--color-felt-dark) 100%);
  color: var(--color-text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}

/* ============================================
   Header
   ============================================ */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 12px;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-center {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}

#timer {
  font-variant-numeric: tabular-nums;
  min-width: 50px;
}

#move-count {
  font-size: 12px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.icon-btn:disabled:active {
  transform: none;
}

.icon-btn svg {
  width: 24px;
  height: 24px;
}

/* ============================================
   Game Board
   ============================================ */
#game-board {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--pile-gap);
  gap: var(--pile-gap);
  overflow: hidden;
}

/* Top Row: Stock, Waste, Foundations */
#top-row {
  display: flex;
  justify-content: space-between;
  gap: var(--pile-gap);
}

#stock-waste-area {
  display: flex;
  gap: var(--pile-gap);
}

#foundations-area {
  display: flex;
  gap: var(--pile-gap);
}

/* Tableau Row */
#tableau-row {
  flex: 1;
  display: flex;
  justify-content: space-between;
  gap: var(--pile-gap);
}

/* ============================================
   Pile Styles
   ============================================ */
.pile {
  width: var(--card-width);
  min-height: var(--card-height);
  border-radius: var(--card-radius);
  position: relative;
  transition: box-shadow var(--transition-fast);
}

.pile.empty {
  background: rgba(255, 255, 255, 0.05);
  border: 2px dashed rgba(255, 255, 255, 0.2);
}

/* Stock pile */
.stock-pile {
  cursor: pointer;
}

.stock-pile .card {
  cursor: pointer;
}

.recycle-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: calc(var(--card-width) * 0.5);
  color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.recycle-indicator:hover {
  color: rgba(255, 255, 255, 0.7);
}

.recycle-indicator:active {
  transform: translate(-50%, -50%) scale(0.9);
}

/* Waste pile */
.waste-pile {
  min-width: calc(var(--card-width) + 40px);
}

.waste-pile .card.waste-spread {
  position: absolute;
}

/* Foundation pile */
.foundation-pile {
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid rgba(255, 255, 255, 0.15);
}

.foundation-placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: calc(var(--card-width) * 0.4);
  opacity: 0.3;
}

/* Tableau pile */
.tableau-pile {
  width: var(--card-width);
  min-height: calc(var(--card-height) * 2.5);
  flex-shrink: 0;
}

.tableau-placeholder {
  width: 100%;
  height: var(--card-height);
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--card-radius);
}

/* Drop target highlight */
.pile.drop-target {
  box-shadow: 0 0 0 3px var(--color-gold), 0 0 20px rgba(201, 162, 39, 0.5);
}

.pile.drop-target::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: calc(var(--card-radius) + 3px);
  border: 2px solid var(--color-gold-light);
  animation: pulse-glow 1s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ============================================
   Card Styles
   ============================================ */
.card {
  width: var(--card-width);
  height: var(--card-height);
  border-radius: var(--card-radius);
  position: absolute;
  left: 0;
  top: 0;
  background: var(--color-card-white);
  box-shadow: 0 2px 4px var(--color-card-shadow),
              0 1px 2px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: grab;
  touch-action: none;
}

.card:active {
  cursor: grabbing;
}

/* Face-down card */
.card.face-down {
  background: url('./assets/card-back.svg') center/cover no-repeat;
  cursor: default;
}

/* Face-up card */
.card.face-up {
  display: flex;
  flex-direction: column;
}

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

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

/* Card content */
.card-corner {
  position: absolute;
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 1px;
  line-height: 1;
}

.card-corner.top-left {
  top: calc(var(--card-width) * 0.08);
  left: calc(var(--card-width) * 0.1);
}

.card-corner.bottom-right {
  display: none; /* Hide bottom corner for cleaner look */
}

.card-rank {
  font-weight: 700;
  font-size: calc(var(--card-width) * 0.38);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.card-suit {
  font-size: calc(var(--card-width) * 0.24);
  line-height: 1;
}

.card-center {
  position: absolute;
  top: 55%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.card-suit-large {
  font-size: calc(var(--card-width) * 0.7);
}

/* Card states */
.card.top-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--color-card-shadow),
              0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Card animations */
.card.flipping {
  animation: card-flip 0.3s ease-in-out;
}

@keyframes card-flip {
  0% { transform: rotateY(0deg); }
  50% { transform: rotateY(90deg); }
  100% { transform: rotateY(0deg); }
}

/* Win animation */
.foundation-pile.win-bounce {
  animation: win-bounce 0.5s ease-out;
}

@keyframes win-bounce {
  0%, 100% { transform: translateY(0); }
  30% { transform: translateY(-15px); }
  50% { transform: translateY(-10px); }
  70% { transform: translateY(-5px); }
}

.card.win-cascade {
  animation: win-cascade 0.8s ease-out forwards;
}

@keyframes win-cascade {
  0% { transform: translateY(0) rotate(0deg); }
  100% { transform: translateY(-30px) rotate(10deg); }
}

/* ============================================
   Drag Layer
   ============================================ */
#drag-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: var(--z-drag);
}

.drag-ghost {
  position: absolute;
  pointer-events: none;
  z-index: var(--z-drag);
}

.drag-ghost .card {
  position: absolute;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4),
              0 4px 8px rgba(0, 0, 0, 0.3);
  transform: rotate(2deg);
}

/* ============================================
   Modal
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal.visible {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: linear-gradient(145deg, var(--color-felt-light) 0%, var(--color-felt) 100%);
  border-radius: 16px;
  padding: 24px;
  max-width: 320px;
  width: 90%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.visible .modal-content {
  transform: scale(1);
}

.modal-content h2 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 24px;
  font-weight: 600;
}

/* Draw mode selection */
.draw-mode-selection {
  margin-bottom: 24px;
}

.draw-mode-selection p {
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-text-muted);
}

.draw-mode-buttons {
  display: flex;
  gap: 12px;
}

.draw-mode-btn {
  flex: 1;
  padding: 16px 12px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 18px;
  font-weight: 600;
}

.draw-mode-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
}

.draw-mode-btn.selected {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-felt-dark);
}

.draw-mode-btn .mode-desc {
  font-size: 12px;
  font-weight: 400;
  opacity: 0.7;
}

/* Modal buttons */
.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.primary-btn,
.secondary-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.primary-btn {
  background: var(--color-gold);
  color: var(--color-felt-dark);
}

.primary-btn:hover {
  box-shadow: 0 4px 12px rgba(201, 162, 39, 0.4);
}

.primary-btn:active {
  transform: scale(0.98);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.secondary-btn:active {
  transform: scale(0.98);
}

/* Win modal */
.win-modal .modal-content {
  text-align: center;
}

.win-stats {
  margin: 20px 0;
}

.win-stats p {
  margin: 8px 0;
  font-size: 16px;
}

/* Stats modal */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-item {
  text-align: center;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.stat-value {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-gold);
}

.stat-label {
  display: block;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ============================================
   Unwinnable Banner
   ============================================ */
.unwinnable-banner {
  position: fixed;
  bottom: calc(20px + var(--safe-area-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 12px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: var(--z-banner);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.unwinnable-banner.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.banner-text {
  font-size: 14px;
  color: var(--color-text);
}

.banner-dismiss {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.banner-dismiss:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   Accessibility & Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode improvements */
@media (prefers-contrast: high) {
  .card {
    border: 2px solid var(--color-black);
  }

  .card.face-down {
    border: 2px solid var(--color-gold);
  }

  .pile.empty {
    border: 2px solid rgba(255, 255, 255, 0.5);
  }
}

/* ============================================
   Landscape Adjustments
   ============================================ */
@media (orientation: landscape) and (max-height: 500px) {
  :root {
    --card-width: min(8vh, 60px);
    --header-height: 40px;
  }

  #header {
    padding: 0 8px;
  }

  .icon-btn {
    width: 34px;
    height: 34px;
  }

  .icon-btn svg {
    width: 20px;
    height: 20px;
  }

  #game-board {
    padding: calc(var(--pile-gap) * 0.5);
    gap: calc(var(--pile-gap) * 0.5);
  }
}

/* ============================================
   Print Styles (hide for printing)
   ============================================ */
@media print {
  body {
    display: none;
  }
}