/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: "Libre Franklin", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  overflow-x: hidden;
}

/* ---------- Theme variables ---------- */
:root {
  --bg: #ffffff;
  --text: #1a1a1b;
  --muted: #787c7e;
  --border: #d3d6da;
  --border-strong: #878a8c;
  --key-bg: #d3d6da;
  --key-text: #1a1a1b;
  --tile-empty-border: #d3d6da;
  --tile-filled-border: #878a8c;

  --correct: #6aaa64;
  --present: #c9b458;
  --absent: #787c7e;
  --on-tile: #ffffff;

  --topbar-bg: #ffffff;
  --topbar-border: #d3d6da;
  --modal-bg: #ffffff;
  --modal-shadow: 0 4px 23px rgba(0,0,0,.2);
  --overlay: rgba(255,255,255,.5);

  --header-h: 56px;
}

body.dark {
  --bg: #121213;
  --text: #ffffff;
  --muted: #818384;
  --border: #3a3a3c;
  --border-strong: #565758;
  --key-bg: #818384;
  --key-text: #ffffff;
  --tile-empty-border: #3a3a3c;
  --tile-filled-border: #565758;

  --correct: #538d4e;
  --present: #b59f3b;
  --absent: #3a3a3c;
  --on-tile: #ffffff;

  --topbar-bg: #121213;
  --topbar-border: #3a3a3c;
  --modal-bg: #121213;
  --overlay: rgba(0,0,0,.5);
}

body.contrast {
  --correct: #f5793a;
  --present: #85c0f9;
}

/* ---------- Top bar ---------- */
.topbar {
  height: var(--header-h);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 16px;
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-side { display: flex; gap: 4px; }
.topbar-right { justify-content: flex-end; }
.title {
  margin: 0;
  font-family: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -0.01em;
  text-align: center;
  line-height: 1;
}
.icon-btn {
  background: transparent;
  border: 0;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { background: rgba(127,127,127,.12); }
.icon-btn:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

/* ---------- Game layout ---------- */
.game {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 500px;
  width: 100%;
  margin: 0 auto;
  padding: 0 8px;
  position: relative;
}

.board-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 0;
  min-height: 0;
}
.board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  gap: 5px;
  width: min(330px, 80vw, calc((100vh - 280px) * 5 / 6));
  aspect-ratio: 5 / 6;
}
.row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}
.tile {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text);
  border: 2px solid var(--tile-empty-border);
  background: transparent;
  line-height: 1;
  user-select: none;
  transition: transform 100ms ease, border-color 80ms;
  perspective: 1000px;
}
.tile.filled {
  border-color: var(--tile-filled-border);
  animation: pop 100ms ease-in-out;
}
.tile.correct, .tile.present, .tile.absent {
  color: var(--on-tile);
  border-color: transparent;
}
.tile.correct { background: var(--correct); }
.tile.present { background: var(--present); }
.tile.absent  { background: var(--absent); }

/* Tile flip animation when revealing guess result */
.tile.flip { animation: flip 600ms ease forwards; }

@keyframes flip {
  0%   { transform: rotateX(0); border-color: var(--tile-filled-border); background: transparent; color: var(--text); }
  49%  { transform: rotateX(90deg); border-color: var(--tile-filled-border); background: transparent; color: var(--text); }
  50%  { transform: rotateX(90deg); border-color: transparent; }
  100% { transform: rotateX(0); border-color: transparent; }
}
.tile.flip.correct { background: var(--correct); }
.tile.flip.present { background: var(--present); }
.tile.flip.absent  { background: var(--absent); }

@keyframes pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}

/* Shake row on invalid guess */
.row.shake { animation: shake 600ms; }
@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

/* Bounce on win */
.row.bounce .tile { animation: bounce 1000ms; }
.row.bounce .tile:nth-child(1) { animation-delay: 0ms; }
.row.bounce .tile:nth-child(2) { animation-delay: 100ms; }
.row.bounce .tile:nth-child(3) { animation-delay: 200ms; }
.row.bounce .tile:nth-child(4) { animation-delay: 300ms; }
.row.bounce .tile:nth-child(5) { animation-delay: 400ms; }
@keyframes bounce {
  0%, 20%   { transform: translateY(0); }
  40%       { transform: translateY(-30px); }
  50%       { transform: translateY(5px); }
  60%       { transform: translateY(-15px); }
  80%       { transform: translateY(2px); }
  100%      { transform: translateY(0); }
}

/* ---------- Keyboard ---------- */
.keyboard {
  /* Bottom padding clears the iPhone home indicator when installed as a PWA */
  padding: 8px 4px max(20px, env(safe-area-inset-bottom, 20px));
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kb-row {
  /* 20-column grid so alpha keys span 2 cols, wide keys span 3, spacers span 1.
     This keeps every alphabet key the same width across all three rows. */
  display: grid;
  grid-template-columns: repeat(20, 1fr);
  gap: 6px;
  width: 100%;
  touch-action: manipulation;
}
.key {
  grid-column: span 2;
  height: 58px;
  min-width: 0;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: var(--key-bg);
  color: var(--key-text);
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  transition: background-color 120ms;
}
.key:hover { filter: brightness(.95); }
.key:active { filter: brightness(.85); }
.key.wide { grid-column: span 3; font-size: 0.78rem; padding: 0 4px; }
.kb-spacer { grid-column: span 1; } /* invisible half-key offset for row 2 */
.key.correct { background: var(--correct); color: var(--on-tile); }
.key.present { background: var(--present); color: var(--on-tile); }
.key.absent  { background: var(--absent);  color: var(--on-tile); }

@media (max-width: 380px) {
  .key { height: 50px; font-size: 1rem; }
  .key.wide { font-size: 0.7rem; }
}

/* ---------- Toast / message ---------- */
.message {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 12px 18px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 14px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms;
  z-index: 5;
  white-space: nowrap;
  max-width: 90vw;
  text-align: center;
}
.message.show { opacity: 1; }

/* ---------- Modals ---------- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.45);
  z-index: 100;
  padding: 16px;
  animation: fade-in 150ms ease;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--modal-bg);
  color: var(--text);
  border-radius: 8px;
  max-width: 420px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px 22px 24px;
  position: relative;
  box-shadow: var(--modal-shadow);
  animation: slide-up 200ms ease;
}
.modal-close {
  position: absolute;
  top: 8px;
  right: 10px;
  background: transparent;
  border: 0;
  font-size: 28px;
  line-height: 1;
  color: var(--text);
  cursor: pointer;
  padding: 4px 8px;
}
.modal-card h2 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
}
.modal-card h3 {
  margin: 16px 0 8px;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}
.modal-card p { margin: 8px 0; line-height: 1.45; }
.modal-card hr { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes slide-up { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Help examples */
.rules { padding-left: 20px; margin: 6px 0 12px; }
.rules li { margin: 4px 0; }
.example-row {
  display: flex;
  gap: 4px;
  margin: 8px 0 4px;
}
.tile.small {
  width: 38px;
  height: 38px;
  font-size: 1.1rem;
  border-width: 2px;
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin: 8px 0;
}
.stat { text-align: center; }
.stat-num { font-size: 28px; font-weight: 400; }
.stat-label { font-size: 11px; }

.distribution {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 4px 0;
}
.dist-row {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 8px;
  align-items: center;
  font-weight: 700;
}
.dist-bar {
  background: var(--absent);
  color: var(--on-tile);
  padding: 2px 8px;
  display: flex;
  justify-content: flex-end;
  min-width: 20px;
  font-size: 14px;
  height: 22px;
  align-items: center;
}
.dist-bar.highlight { background: var(--correct); }

.stats-footer {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  gap: 16px;
}
.next-wordle { text-align: center; }
.countdown {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.divider { width: 1px; background: var(--border); height: 50px; align-self: center; }

.btn-primary {
  background: var(--correct);
  color: var(--on-tile);
  border: 0;
  border-radius: 4px;
  padding: 14px 22px;
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 8px 14px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
}
.btn-secondary:hover { background: rgba(127,127,127,.08); }

/* Settings */
.setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  gap: 16px;
}
.setting:first-of-type { border-top: 0; }
.setting-name { font-size: 16px; }
.setting-desc { font-size: 12px; color: var(--muted); margin-top: 2px; }

.switch { position: relative; display: inline-block; width: 40px; height: 22px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer; inset: 0;
  background: #ccc; border-radius: 22px; transition: .2s;
}
.slider::before {
  content: ""; position: absolute;
  height: 18px; width: 18px;
  left: 2px; top: 2px;
  background: white; border-radius: 50%;
  transition: .2s;
}
.switch input:checked + .slider { background: var(--correct); }
.switch input:checked + .slider::before { transform: translateX(18px); }

/* Body class for practice mode */
body.practice .practice-only { display: flex !important; }
body:not(.practice) .practice-only { display: none !important; }