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

:root {
  --color-correct: #538d4e;
  --color-present: #b59f3b;
  --color-absent: #3a3a3c;
  --color-tile-border: #3a3a3c;
  --color-tile-border-filled: #565758;
  --color-bg: #121213;
  --color-text: #ffffff;
  --color-key-bg: #818384;
  --color-key-text: #ffffff;
  --color-modal-bg: #1a1a1b;
  --color-toast-bg: #ffffff;
  --color-toast-text: #121213;
  --tile-size: 62px;
  --tile-gap: 5px;
  --tile-font: 2rem;
}

html, body {
  height: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  display: flex;
  justify-content: center;
  overflow: hidden;
  touch-action: manipulation;
}

#game {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

/* === Header === */
header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 50px;
  border-bottom: 1px solid var(--color-tile-border);
  position: relative;
  flex-shrink: 0;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  position: absolute;
}

#help-btn { left: 16px; }
#settings-btn { right: 16px; }

/* === Toast === */
#toast-container {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--color-toast-bg);
  color: var(--color-toast-text);
  padding: 12px 24px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9rem;
  animation: slideIn 0.15s ease;
}

.toast.fade-out {
  animation: fadeOut 0.3s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* === Board === */
#board-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#board {
  display: grid;
  grid-template-rows: repeat(6, var(--tile-size));
  gap: var(--tile-gap);
  padding: 10px;
}

.row {
  display: grid;
  grid-template-columns: repeat(5, var(--tile-size));
  gap: var(--tile-gap);
}

/* === Tiles === */
.tile {
  width: var(--tile-size);
  height: var(--tile-size);
  border: 2px solid var(--color-tile-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--tile-font);
  font-weight: 700;
  text-transform: uppercase;
  user-select: none;
  transition: background-color 0s, border-color 0s;
}

.tile.filled {
  border-color: var(--color-tile-border-filled);
}

.tile.correct {
  background: var(--color-correct);
  border-color: var(--color-correct);
  color: white;
}

.tile.present {
  background: var(--color-present);
  border-color: var(--color-present);
  color: white;
}

.tile.absent {
  background: var(--color-absent);
  border-color: var(--color-absent);
  color: white;
}

/* Tile pop animation (on letter entry) */
.tile.pop {
  animation: pop 0.1s ease;
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

/* Tile flip animation */
.tile.flip {
  animation: flipIn 0.3s ease forwards;
}

.tile.flip-back {
  animation: flipOut 0.3s ease forwards;
}

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

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

/* Bounce animation (on win) */
.tile.bounce {
  animation: bounce 0.5s ease;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  30% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

/* Row shake animation (invalid guess) */
.row.shake {
  animation: shake 0.6s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 50%, 90% { transform: translateX(-4px); }
  30%, 70% { transform: translateX(4px); }
}

/* === Keyboard === */
#keyboard {
  padding: 8px;
  flex-shrink: 0;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 6px;
}

.key {
  height: 58px;
  min-width: 32px;
  padding: 0;
  border: none;
  border-radius: 4px;
  background: var(--color-key-bg);
  color: var(--color-key-text);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  max-width: 44px;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.1s;
}

.key:active {
  opacity: 0.8;
}

.key.wide {
  max-width: 66px;
  font-size: 0.75rem;
}

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

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

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

/* === Modals === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background: var(--color-modal-bg);
  border-radius: 8px;
  padding: 24px;
  max-width: 450px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
}

.modal h2 {
  text-align: center;
  margin-bottom: 16px;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.modal h3 {
  text-align: center;
  margin: 16px 0 8px;
  font-size: 1rem;
  text-transform: uppercase;
}

.modal p {
  margin-bottom: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.modal ul {
  margin-bottom: 16px;
  padding-left: 20px;
  font-size: 0.9rem;
  line-height: 1.8;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* Help modal examples */
.examples {
  border-top: 1px solid var(--color-tile-border);
  padding-top: 16px;
}

.example-row {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.example-tile {
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-tile-border-filled);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
}

.example-tile.correct {
  background: var(--color-correct);
  border-color: var(--color-correct);
}

.example-tile.present {
  background: var(--color-present);
  border-color: var(--color-present);
}

.example-tile.absent {
  background: var(--color-absent);
  border-color: var(--color-absent);
}

/* Settings modal */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-tile-border);
}

.setting-label {
  font-size: 1rem;
  font-weight: 700;
}

.setting-desc {
  display: block;
  font-size: 0.75rem;
  color: #818384;
  margin-top: 2px;
}

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

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

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--color-absent);
  border-radius: 22px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}

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

.toggle input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

/* Stats modal */
.stat-items {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
}

.dist-label {
  width: 12px;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 700;
}

.dist-bar {
  background: var(--color-absent);
  padding: 2px 8px;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 2px;
  min-width: 24px;
}

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

.dist-count {
  font-size: 0.85rem;
}

.share-btn {
  display: block;
  margin: 20px auto 0;
  padding: 12px 32px;
  background: var(--color-correct);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.05em;
}

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

.share-btn.hidden {
  display: none;
}

/* === Responsive === */
@media (max-height: 700px) {
  :root {
    --tile-size: 52px;
    --tile-font: 1.6rem;
  }
  .key { height: 50px; }
}

@media (max-height: 600px) {
  :root {
    --tile-size: 44px;
    --tile-font: 1.4rem;
  }
  .key { height: 44px; }
  header { height: 40px; }
  header h1 { font-size: 1.4rem; }
}

@media (max-width: 360px) {
  :root {
    --tile-size: 50px;
  }
  .keyboard-row { gap: 4px; }
  .key { min-width: 26px; font-size: 0.75rem; }
  .key.wide { max-width: 56px; }
}