/* ==========================================================================
   Wordle — Modern Minimalist Web Edition
   ========================================================================== */

:root {
  --bg-color: #faf9f6;
  --bg-card: #ffffff;
  --text-main: #1c1917;
  --text-muted: #78716c;
  --border-color: #d6d3d1;
  --tile-empty-border: #d3d6da;
  --tile-filled-border: #878a8c;
  
  --color-correct: #2d6a4f;
  --color-present: #d97706;
  --color-absent: #78716c;
  --text-contrast: #ffffff;
  
  --key-bg: #e7e5e4;
  --key-text: #1c1917;
  --key-bg-hover: #d6d3d1;
  
  --modal-overlay: rgba(0, 0, 0, 0.45);
  --toast-bg: #1c1917;
  --toast-text: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Menlo", monospace;
}

[data-theme="dark"] {
  --bg-color: #141416;
  --bg-card: #1c1c1f;
  --text-main: #f5f5f4;
  --text-muted: #a8a29e;
  --border-color: #29292e;
  --tile-empty-border: #3a3a3c;
  --tile-filled-border: #565758;
  
  --color-correct: #52b788;
  --color-present: #f59e0b;
  --color-absent: #3a3a3c;
  --text-contrast: #141416;
  
  --key-bg: #29292e;
  --key-text: #f5f5f4;
  --key-bg-hover: #3f3f46;
  
  --modal-overlay: rgba(0, 0, 0, 0.7);
  --toast-bg: #f5f5f4;
  --toast-text: #141416;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  user-select: none;
  -webkit-user-select: none;
}

/* Header */
.app-header {
  width: 100%;
  max-width: 520px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  border-bottom: 1px solid var(--border-color);
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.back-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all 0.2s;
}

.back-link:hover {
  color: var(--text-main);
  background: var(--key-bg);
}

.header-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  margin-left: 0.5rem;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.icon-btn:hover {
  color: var(--text-main);
  background: var(--key-bg);
}

.mode-badge {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 12px;
  background: var(--key-bg);
  color: var(--text-muted);
  cursor: pointer;
  border: 1px solid var(--border-color);
  transition: all 0.2s;
}

.mode-badge:hover {
  color: var(--text-main);
}

/* Board Area */
.game-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 500px;
  padding: 0.75rem 0.5rem 1rem 0.5rem;
}

.board-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-grow: 1;
  width: 100%;
  padding: 0.5rem 0;
}

.board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  grid-gap: 6px;
  width: 320px;
  height: 380px;
}

.board-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-gap: 6px;
}

.tile {
  width: 100%;
  height: 100%;
  border: 2px solid var(--tile-empty-border);
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: 1.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-main);
  border-radius: 4px;
  transition: transform 0.15s ease;
}

.tile[data-state="filled"] {
  border-color: var(--tile-filled-border);
  animation: pop 0.1s ease-in-out;
}

.tile[data-state="correct"] {
  background-color: var(--color-correct);
  border-color: var(--color-correct);
  color: var(--text-contrast);
}

.tile[data-state="present"] {
  background-color: var(--color-present);
  border-color: var(--color-present);
  color: #ffffff;
}

.tile[data-state="absent"] {
  background-color: var(--color-absent);
  border-color: var(--color-absent);
  color: #ffffff;
}

/* Animations */
@keyframes pop {
  0% { transform: scale(0.9); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.tile.flip {
  animation: flip 0.5s ease forwards;
}

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

.board-row.shake {
  animation: shake 0.45s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

/* Virtual Keyboard */
.keyboard {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 0 4px;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  touch-action: manipulation;
  gap: 5px;
}

.key {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  height: 56px;
  border-radius: 5px;
  background-color: var(--key-bg);
  color: var(--key-text);
  border: none;
  cursor: pointer;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-transform: uppercase;
  transition: all 0.15s ease;
}

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

.key.wide {
  flex: 1.5;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.key[data-state="correct"] {
  background-color: var(--color-correct);
  color: var(--text-contrast);
}

.key[data-state="present"] {
  background-color: var(--color-present);
  color: #ffffff;
}

.key[data-state="absent"] {
  background-color: var(--color-absent);
  color: #ffffff;
  opacity: 0.6;
}

/* Toast Notification */
.toast-container {
  position: fixed;
  top: 12%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  background-color: var(--toast-bg);
  color: var(--toast-text);
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  animation: toastFade 1.8s ease forwards;
}

@keyframes toastFade {
  0% { opacity: 0; transform: translateY(-10px); }
  15% { opacity: 1; transform: translateY(0); }
  80% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-10px); }
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--modal-overlay);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 1rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 440px;
  padding: 1.75rem;
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transform: translateY(20px);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-size: 1.35rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

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

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
  margin-bottom: 1.5rem;
}

.stat-val {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-main);
}

.stat-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.dist-title {
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.dist-bar {
  background: var(--key-bg);
  color: var(--text-main);
  padding: 3px 8px;
  border-radius: 3px;
  font-weight: 600;
  min-width: 20px;
  text-align: right;
  transition: width 0.3s ease;
}

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

.share-btn {
  width: 100%;
  margin-top: 1.5rem;
  padding: 12px;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--color-correct);
  color: var(--text-contrast);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  transition: opacity 0.2s;
}

.share-btn:hover {
  opacity: 0.9;
}

/* Confetti Canvas */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
}