:root {
  --bg: #121213; --fg: #fff;
  --tile-empty: #121213; --tile-border: #3a3a3c;
  --tile-border-active: #565758;
  --gray: #3a3a3c; --yellow: #b59f3b; --green: #538d4e;
  --key: #818384; --strike: #e74c3c;
  --warn: #e6a23c; --error: #e74c3c;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  height: 100dvh; /* Mobile viewport fix */
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}
body {
  display: flex; flex-direction: column; align-items: center;
  height: 100dvh; padding: 8px; gap: 6px;
}
header {
  width: 100%; max-width: 560px;
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--tile-border);
  padding-bottom: 6px;
}
header h1 { font-size: 18px; letter-spacing: 2px; margin: 0; font-weight: 700; }
header h1.clickable { cursor: pointer; user-select: none; transition: opacity .15s; }
header h1.clickable:hover { opacity: 0.7; }
.header-buttons { display: flex; gap: 6px; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--tile-border);
  color: #aaa; width: 30px; height: 30px;
  border-radius: 4px; cursor: pointer; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: #1a1a1b; color: #fff; }
.icon-btn svg { width: 15px; height: 15px; }
.status-bar {
  width: 100%; max-width: 560px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; min-height: 26px;
}
.language {
  background: #2a2a2b; padding: 3px 10px; border-radius: 12px;
  font-weight: 600; letter-spacing: 1px; font-size: 12px;
  border: 1px solid var(--tile-border);
  transition: background .3s, border-color .3s, color .3s;
  display: flex; align-items: center;
}
.language.german {
  background: #3a2a10; border-color: var(--yellow); color: #f0d264;
}
.attempts { color: #aaa; font-size: 12px; }
.solved-banner {
  width: 100%; max-width: 560px; text-align: center;
  font-size: 13px; color: var(--green); font-weight: 600;
  padding: 6px; border-radius: 4px;
  background: rgba(83,141,78,.15); display: none;
}
.solved-banner.show { display: block; }

#board {
  display: flex; flex-direction: column; align-items: center;
  gap: 4px; width: 100%; max-width: 560px;
  overflow-y: auto; flex: 1; padding: 4px 0; min-height: 0;
}
.row { display: flex; gap: 4px; justify-content: center; }
.tile {
  width: 44px; height: 44px;
  border: 2px solid var(--tile-border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 20px; text-transform: uppercase;
  border-radius: 4px; background: var(--tile-empty);
  transition: border-color .1s, background .2s;
  position: relative; user-select: none; flex-shrink: 0;
}
.tile.filled { border-color: var(--tile-border-active); }
.tile.pop { animation: tilePop .12s ease-out; }
@keyframes tilePop { 50% { transform: scale(1.12); } }
.tile.flip { animation: tileFlip .5s ease forwards; }
@keyframes tileFlip {
  0% { transform: rotateX(0); }
  50% { transform: rotateX(90deg); }
  100% { transform: rotateX(0); }
}
.tile.gray { background: var(--gray); border-color: var(--gray); }
.tile.yellow { background: var(--yellow); border-color: var(--yellow); }
.tile.green { background: var(--green); border-color: var(--green); }
.tile.out-of-scope {
  background: var(--gray); border-color: var(--gray);
  color: #bbb; text-decoration: line-through;
  text-decoration-color: var(--strike); text-decoration-thickness: 2px;
}
.tile.out-of-scope::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top right,
    transparent calc(50% - 1px),
    var(--strike) calc(50% - 1px),
    var(--strike) calc(50% + 1px),
    transparent calc(50% + 1px));
  pointer-events: none; border-radius: 4px;
}

#keyboard { width: 100%; max-width: 560px; display: flex; flex-direction: column; gap: 5px; }
.kb-row { display: flex; justify-content: center; gap: 4px; }
.key {
  flex: 1; min-width: 0; height: 44px;
  background: var(--key); color: #fff;
  border: none; border-radius: 4px;
  font-weight: 600; font-size: 12px;
  cursor: pointer; text-transform: uppercase;
  transition: background .2s; user-select: none; padding: 0;
  display: flex; align-items: center; justify-content: center;
  touch-action: manipulation; /* Mobile tap fix */
}
.key.wide { flex: 1.5; font-size: 11px; }
.key:active { filter: brightness(1.3); }
.key.gray { background: var(--gray); }
.key.yellow { background: var(--yellow); }
.key.green { background: var(--green); }
.key.special { background: #4a4a4c; }

#toast {
  position: fixed; top: 80px; left: 50%;
  transform: translateX(-50%);
  background: #fff; color: #000;
  padding: 10px 16px; border-radius: 4px;
  font-weight: 600; font-size: 13px;
  opacity: 0; pointer-events: none; transition: opacity .2s;
  z-index: 120; text-align: center; max-width: 90%;
}
#toast.show { opacity: 1; }

/* Setup screen */
#setupScreen {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 100; padding: 24px; gap: 16px; overflow-y: auto;
}
#setupScreen.hidden { display: none; }
.setup-title { font-size: 22px; letter-spacing: 3px; margin: 0; font-weight: 700; }
.setup-card {
  background: #1a1a1b; border: 1px solid var(--tile-border);
  border-radius: 8px; padding: 24px;
  display: flex; flex-direction: column;
  gap: 16px; width: 100%; max-width: 420px;
}
.setup-field { display: flex; flex-direction: column; gap: 6px; }
.setup-field > label {
  font-size: 11px; color: #aaa; text-transform: uppercase;
  letter-spacing: 1.2px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center;
}
.setup-field > label .tag {
  font-size: 9px; padding: 2px 6px; border-radius: 3px;
  background: #2a2a2b; color: #888; letter-spacing: 1px;
}
.setup-field > label .tag.req { background: rgba(231,76,60,.15); color: #e74c3c; }
.setup-field > label .tag.opt { background: rgba(83,141,78,.15); color: #6dbb6a; }
.setup-field > label .tag.ok { background: rgba(83,141,78,.15); color: #6dbb6a; }

/* Code Input */
.code-input {
  width: 100%; padding: 12px;
  background: #2a2a2b; border: 1px solid var(--tile-border);
  color: #fff; border-radius: 4px; font-size: 14px;
  outline: none; transition: border-color .2s;
}
.code-input:focus { border-color: var(--green); }
.code-input::placeholder { color: #666; }

/* Language / mode chips */
.lang-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px; border-radius: 20px;
  background: #2a2a2b; border: 1px solid var(--tile-border);
  color: #ddd; font-weight: 600; font-size: 13px;
  cursor: pointer; transition: background .15s, border-color .15s, color .15s;
  display: flex; align-items: center; justify-content: center;
  touch-action: manipulation;
}
.chip:hover { background: #3a3a3b; }
.chip.selected { background: var(--green); border-color: var(--green); color: #fff; }
.chip:disabled { opacity: .4; cursor: not-allowed; }

/* Mode buttons: rectangular, fill the row */
.mode-chips {
  display: flex;
  gap: 6px;
}
.mode-chips .chip {
  flex: 1;
  border-radius: 4px;
  padding: 12px 16px;
  text-align: center;
}

.tries-customizer {
  display: flex; align-items: center;
  gap: 14px; justify-content: center; padding: 4px 0;
}
.tries-customizer .arrow {
  background: #2a2a2b; border: 1px solid var(--tile-border);
  color: #fff; width: 42px; height: 42px;
  border-radius: 6px; font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .1s, transform .05s;
  touch-action: manipulation;
}
.tries-customizer .arrow:hover { background: #3a3a3b; }
.tries-customizer .arrow:active { transform: scale(0.94); }
.tries-customizer .arrow:disabled { opacity: 0.35; cursor: not-allowed; }
.tries-customizer .tries-value {
  font-size: 18px; font-weight: 700;
  min-width: 100px; text-align: center;
}
#startBtn {
  padding: 14px; background: var(--green); color: #fff;
  border: none; border-radius: 4px;
  font-weight: 700; font-size: 14px;
  letter-spacing: 2px; cursor: pointer;
  transition: background .2s, opacity .2s;
  touch-action: manipulation;
}
#startBtn:disabled { background: #3a3a3c; color: #666; cursor: not-allowed; }
#startBtn:not(:disabled):hover { filter: brightness(1.1); }

/* Subtle rules link on setup screen */
.rules-link {
  background: transparent; border: none;
  color: #666; font-size: 12px;
  cursor: pointer; padding: 8px 12px;
  display: inline-flex; align-items: center; gap: 6px;
  letter-spacing: .5px;
  transition: color .15s;
  margin-top: -4px;
}
.rules-link:hover { color: #bbb; }
.rules-link svg { width: 13px; height: 13px; opacity: .8; }

/* Shared overlay + modal */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.7);
  display: none; align-items: center; justify-content: center;
  z-index: 90; padding: 16px;
}
.overlay.show { display: flex; }
.modal {
  background: #1a1a1b; border: 1px solid var(--tile-border);
  border-radius: 8px; padding: 24px;
  max-width: 340px; width: 100%; text-align: center;
}
.modal h2 { margin: 0 0 12px; font-size: 18px; }
.modal p { margin: 8px 0; font-size: 14px; color: #ccc; }

.modal .word-reveal {
  font-size: 24px; font-weight: 700;
  letter-spacing: 2px; margin: 18px 0;
}
.modal .word-reveal .en, 
.modal .word-reveal .de {
  display: flex; align-items: center; justify-content: center;
  margin: 8px 0; font-size: 22px;
}
.modal .word-reveal hr {
  border: 0; border-top: 1px solid var(--tile-border);
  width: 60%; margin: 12px auto;
}
.modal .word-reveal img {
  margin-right: 10px; border-radius: 3px;
}
/* Colors for win/loss */
.modal .word-reveal .color-green { color: var(--green); }
.modal .word-reveal .color-red { color: var(--error); }
.modal .word-reveal .color-dim { color: #666; }

.modal button {
  margin-top: 16px; padding: 10px 22px;
  background: var(--green); color: #fff;
  border: none; border-radius: 4px;
  font-weight: 700; font-size: 13px;
  cursor: pointer; letter-spacing: 1px;
}
.modal button:hover { filter: brightness(1.1); }
.modal .secondary {
  background: transparent; border: 1px solid var(--tile-border);
  color: #ccc; margin-left: 8px;
}

/* Code Summary List */
.summary-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 50vh; overflow-y: auto; padding-right: 4px; margin-bottom: 16px;
}
.summary-item {
  display: flex; justify-content: space-between;
  background: #2a2a2b; padding: 12px 16px; border-radius: 6px;
  font-size: 14px; font-weight: 600;
  border-left: 4px solid transparent;
}
.summary-item div { display: flex; align-items: center; gap: 8px; }
.summary-item.word-green { border-left-color: var(--green); color: var(--green); }
.summary-item.word-red { border-left-color: var(--error); color: var(--error); }
.summary-item.word-yellow { border-left-color: var(--yellow); color: var(--yellow); }

/* Rules modal */
#rulesOverlay { z-index: 110; }
.rules-modal {
  text-align: left;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  padding: 26px 26px 20px;
}
.rules-modal h2 {
  text-align: center;
  font-size: 17px;
  letter-spacing: 2.5px;
  margin: 0 0 18px;
  font-weight: 700;
}
.rules-modal h3 {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--green);
  text-transform: uppercase;
  margin: 20px 0 6px;
  font-weight: 700;
}
.rules-modal h3:first-of-type { margin-top: 0; }
.rules-modal p {
  font-size: 13px;
  line-height: 1.55;
  color: #ddd;
  margin: 6px 0;
}
.rules-modal strong { color: #fff; font-weight: 700; }
.rules-modal em { color: var(--yellow); font-style: normal; font-weight: 600; }
.legend-list { list-style: none; padding: 0; margin: 10px 0; }
.legend-list li {
  display: flex; align-items: center;
  gap: 10px; padding: 5px 0;
  font-size: 13px; color: #ddd;
}
.legend-list .swatch {
  width: 22px; height: 22px;
  border-radius: 3px; flex-shrink: 0;
  position: relative;
}
.legend-list .swatch.green { background: var(--green); }
.legend-list .swatch.yellow { background: var(--yellow); }
.legend-list .swatch.gray { background: var(--gray); }
.legend-list .swatch.struck {
  background: var(--gray);
  color: #bbb;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  text-decoration: line-through;
  text-decoration-color: var(--strike);
  text-decoration-thickness: 2px;
}
.legend-list .swatch.struck::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top right,
    transparent calc(50% - 1px),
    var(--strike) calc(50% - 1px),
    var(--strike) calc(50% + 1px),
    transparent calc(50% + 1px));
}
.rules-footer {
  text-align: center;
  margin-top: 20px;
}
.rules-footer button { margin-top: 0; }

.file-name {
  font-size: 12px; color: #888;
  overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; min-width: 0;
}
.file-name.loaded { color: var(--green); }
.file-name.loading { color: var(--warn); }
.file-name.failed { color: #888; }

@media (max-width: 420px) {
  .tile { width: 38px; height: 38px; font-size: 17px; }
  .key { height: 40px; font-size: 11px; }
  header h1 { font-size: 14px; letter-spacing: 1px; }
  .setup-card { padding: 18px; gap: 14px; }
  .rules-modal { padding: 20px 18px 16px; }
}