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

  /* Theme Defaults (Dark Theme as default) */
  --bg-gradient-start: #1e1e24;
  --bg-gradient-end: #121213;
  --bg-color: #121213;
  --text-color: #f8f9fa;
  --text-muted: #a0aec0;
  
  --border-default: #3a3a3c;
  --border-active: #565758;
  
  --key-bg: #818384;
  --key-bg-hover: #939596;
  --key-text: #f8f9fa;
  
  --dialog-bg: rgba(26, 26, 29, 0.92);
  --dialog-border: rgba(255, 255, 255, 0.08);
  --dialog-shadow: rgba(0, 0, 0, 0.5);
  
  --toast-bg: rgba(248, 249, 250, 0.95);
  --toast-text: #121213;

  /* Tile Colors - Default Palette */
  --color-correct: #6aaa64;
  --color-present: #c9b458;
  --color-absent: #3a3a3c;
  
  /* Layout constraints */
  --header-height: 64px;
}

/* Light Theme Variables */
body.light-theme {
  --bg-gradient-start: #f7fafc;
  --bg-gradient-end: #edf2f7;
  --bg-color: #f7fafc;
  --text-color: #1a202c;
  --text-muted: #4a5568;
  
  --border-default: #d3d6da;
  --border-active: #878a8c;
  
  --key-bg: #d3d6da;
  --key-bg-hover: #c4c7cc;
  --key-text: #1a202c;
  
  --dialog-bg: rgba(255, 255, 255, 0.94);
  --dialog-border: rgba(0, 0, 0, 0.08);
  --dialog-shadow: rgba(0, 0, 0, 0.15);
  
  --toast-bg: rgba(18, 18, 19, 0.95);
  --toast-text: #ffffff;
  
  /* Tile Colors - Default Palette (Light Mode) */
  --color-correct: #6aaa64;
  --color-present: #c9b458;
  --color-absent: #787c7e;
}

/* High Contrast Color Overrides */
body.high-contrast {
  --color-correct: #f5793a; /* Orange */
  --color-present: #85c0f9; /* Blue */
}

/* Base resets & layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: var(--font-body);
  background-color: var(--bg-color);
  background-image: radial-gradient(circle at center, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  color: var(--text-color);
  transition: background-color 0.4s, background-image 0.4s, color 0.4s;
}

#game-container {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

/* Header */
.game-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-default);
  z-index: 10;
}

.header-left {
  flex: 1;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.header-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-header h1 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: -0.5px;
  text-transform: uppercase;
}

.header-right {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 4px;
}

.icon-button {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.35rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, transform 0.1s;
}

.icon-button:hover {
  background-color: rgba(128, 128, 128, 0.15);
}

.icon-button:active {
  transform: scale(0.92);
}

/* Board Layout */
#board-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
}

#board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  gap: 5px;
  width: 100%;
  max-width: 350px;
  aspect-ratio: 5 / 6;
}

.board-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}

/* Tiles styling */
.tile {
  width: 100%;
  aspect-ratio: 1/1;
  border: 2px solid var(--border-default);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  user-select: none;
  color: var(--text-color);
  background-color: transparent;
  transition: border-color 0.1s;
}

/* Animated tile pop */
.tile.pop {
  animation: tilePop 0.15s ease-out;
  border-color: var(--border-active);
}

/* Tile flip and color states */
.tile.flip {
  animation: tileFlip 0.5s ease-in-out forwards;
}

/* Reveal tile values after flip */
.tile.state-correct {
  background-color: var(--color-correct) !important;
  border-color: var(--color-correct) !important;
  color: #ffffff !important;
}

.tile.state-present {
  background-color: var(--color-present) !important;
  border-color: var(--color-present) !important;
  color: #ffffff !important;
}

.tile.state-absent {
  background-color: var(--color-absent) !important;
  border-color: var(--color-absent) !important;
  color: #ffffff !important;
}

/* Shaking row when word is invalid */
.board-row.shake {
  animation: rowShake 0.25s ease-in-out;
}

/* Keyboard Layout */
#keyboard-container {
  padding: 8px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: max(12px, env(safe-area-inset-bottom));
}

.keyboard-row {
  display: flex;
  justify-content: center;
  width: 100%;
  gap: 6px;
  touch-action: manipulation;
}

.keyboard-key {
  flex: 1;
  height: 58px;
  background-color: var(--key-bg);
  color: var(--key-text);
  border: none;
  border-radius: 4px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.15rem;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  user-select: none;
  transition: background-color 0.15s, transform 0.05s, color 0.15s;
}

.keyboard-key:hover {
  background-color: var(--key-bg-hover);
}

.keyboard-key:active {
  transform: scale(0.92);
}

/* Wide keys: Enter and Backspace */
.keyboard-key.wide-key {
  flex: 1.5;
  font-size: 0.85rem;
}

/* Colors for keys based on letters checked */
.keyboard-key.state-correct {
  background-color: var(--color-correct);
  color: #ffffff;
}
.keyboard-key.state-correct:hover {
  filter: brightness(0.9);
}

.keyboard-key.state-present {
  background-color: var(--color-present);
  color: #ffffff;
}
.keyboard-key.state-present:hover {
  filter: brightness(0.9);
}

.keyboard-key.state-absent {
  background-color: var(--color-absent);
  color: #ffffff;
  opacity: 0.5;
}

/* Toast System */
#toast-container {
  position: absolute;
  top: 12%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background-color: var(--toast-bg);
  color: var(--toast-text);
  padding: 12px 20px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  animation: toastFadeIn 0.15s ease-out;
  text-align: center;
  white-space: nowrap;
}

.toast.fade-out {
  animation: toastFadeOut 0.2s ease-in forwards;
}

/* Modals & Dialog Styling */
dialog {
  border: 1px solid var(--dialog-border);
  border-radius: 16px;
  background-color: var(--dialog-bg);
  color: var(--text-color);
  padding: 0;
  max-width: 480px;
  width: 90%;
  box-shadow: 0 10px 30px var(--dialog-shadow);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  outline: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Backdrop */
dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.dialog-content {
  display: flex;
  flex-direction: column;
  max-height: 80dvh;
  overflow: hidden;
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-default);
}

.dialog-header h2 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.5rem;
}

.close-button {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color 0.2s;
}

.close-button:hover {
  color: var(--text-color);
}

.dialog-body {
  padding: 24px;
  overflow-y: auto;
  max-height: 60dvh;
}

/* Scrollbar styles inside modal dialogs */
.dialog-body::-webkit-scrollbar {
  width: 6px;
}
.dialog-body::-webkit-scrollbar-track {
  background: transparent;
}
.dialog-body::-webkit-scrollbar-thumb {
  background-color: rgba(128, 128, 128, 0.3);
  border-radius: 3px;
}

/* Help Dialog Rules */
.intro-text {
  font-size: 0.95rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.rules-list {
  list-style-type: none;
  margin-bottom: 20px;
}

.rules-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.rules-list li::before {
  content: "•";
  color: var(--color-correct);
  font-size: 1.25rem;
  position: absolute;
  left: 0;
  top: -2px;
}

.divider {
  border: 0;
  height: 1px;
  background-color: var(--border-default);
  margin: 18px 0;
}

.example-item {
  margin-bottom: 16px;
}

.example-grid {
  display: flex;
  gap: 5px;
  margin-bottom: 6px;
  width: 150px;
}

.example-grid .tile {
  width: 28px;
  height: 28px;
  border-width: 1px;
  font-size: 0.95rem;
}

.example-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.primary-button {
  background-color: var(--text-color);
  color: var(--bg-color);
  border: none;
  border-radius: 24px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: auto;
  margin: 10px auto 0 auto;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  transition: transform 0.15s, opacity 0.15s;
}

.primary-button:hover {
  opacity: 0.9;
}

.primary-button:active {
  transform: scale(0.96);
}

.primary-button.full-width {
  width: 100%;
}

/* Statistics Styles */
.stats-mode-indicator {
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-align: center;
  color: var(--color-present);
  margin-bottom: 12px;
}

.stats-grid {
  display: flex;
  justify-content: space-around;
  margin-bottom: 24px;
}

.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}

.stat-val {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  max-width: 65px;
  line-height: 1.2;
}

/* Guess Distribution Chart */
.dialog-body h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.distribution-chart {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dist-num {
  font-size: 0.85rem;
  font-weight: 600;
  width: 10px;
}

.dist-bar-wrapper {
  flex: 1;
  background-color: rgba(128, 128, 128, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.dist-bar {
  background-color: var(--border-active);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 8px;
  text-align: right;
  min-width: 24px;
  border-radius: 4px;
  transition: width 0.5s ease-out;
}

.dist-bar.highlight {
  background-color: var(--color-correct);
}

/* Stats Footer */
.stats-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-default);
}

.countdown-section {
  display: flex;
  flex-direction: column;
}

.countdown-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.countdown-time {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
}

.share-button {
  background-color: var(--color-correct);
  color: #ffffff;
  border: none;
  border-radius: 24px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(106, 170, 100, 0.3);
  transition: transform 0.15s, filter 0.15s;
}

body.high-contrast .share-button {
  box-shadow: 0 4px 12px rgba(245, 121, 58, 0.3);
}

.share-button:hover {
  filter: brightness(0.92);
}

.share-button:active {
  transform: scale(0.96);
}

/* Settings Styles */
.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.setting-info {
  display: flex;
  flex-direction: column;
  padding-right: 12px;
}

.setting-label {
  font-size: 1rem;
  font-weight: 600;
}

.setting-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.settings-divider {
  border: 0;
  height: 1px;
  background-color: rgba(128,128,128,0.12);
}

.about-section {
  margin-top: 24px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.about-credits {
  font-size: 0.7rem;
  opacity: 0.75;
}

/* Premium Toggles / iOS Toggles */
.switch-container {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 26px;
  flex-shrink: 0;
}

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

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-default);
  transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 34px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: #ffffff;
  transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

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

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

/* Utility Class */
.hidden {
  display: none !important;
}

/* Animations */
@keyframes tilePop {
  0% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes tileFlip {
  0% {
    transform: rotateX(0deg);
  }
  45% {
    transform: rotateX(90deg);
  }
  55% {
    transform: rotateX(90deg);
  }
  100% {
    transform: rotateX(0deg);
  }
}

@keyframes rowShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

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

@keyframes toastFadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-15px);
  }
}



/* Keyboard styling fixes for narrow screens */
@media (max-width: 360px) {
  .tile {
    font-size: 1.3rem;
  }
  .keyboard-key {
    height: 48px;
    font-size: 1rem;
  }
  .keyboard-key.wide-key {
    font-size: 0.75rem;
  }
}