:root {
  --green:  #6aaa64;
  --yellow: #c9b458;
  --grey:   #787c7e;
  --bg:     #121213;
  --surface:#1a1a1b;
  --border: #3a3a3c;
  --text:   #ffffff;
  --muted:  #818384;
  --ai:     #7c5cbf;
  --gemini: #4285f4;
}

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

body {
  font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#app {
  max-width: 660px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

/* Header */
header {
  text-align: center;
  padding: 20px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

header p {
  color: var(--muted);
  margin-top: 8px;
  font-size: 0.88rem;
}

/* Tiles */
.tile {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 4px;
  border: 2px solid var(--border);
  cursor: pointer;
  user-select: none;
  transition: background 0.12s, border-color 0.12s;
}

.tile.small { width: 40px; height: 40px; font-size: 1rem; cursor: default; }

.tile.grey   { background: var(--grey);   border-color: var(--grey);   }
.tile.green  { background: var(--green);  border-color: var(--green);  }
.tile.yellow { background: var(--yellow); border-color: var(--yellow); }

/* History */
#history { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }

.history-row { display: flex; gap: 6px; }

/* Input section */
#input-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 24px;
}

#guess-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

#word-input {
  flex: 1;
  min-width: 160px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 10px 14px;
  outline: none;
}

#word-input:focus { border-color: #565758; }

#tiles { display: flex; gap: 6px; }

.hint { color: var(--muted); font-size: 0.78rem; margin-top: 14px; line-height: 1.5; }

.swatch {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 0.75rem;
}
.grey-swatch   { background: var(--grey);   }
.green-swatch  { background: var(--green);  }
.yellow-swatch { background: var(--yellow); }

/* Buttons */
button {
  background: var(--green);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: opacity 0.15s;
  margin-top: 16px;
}

button:hover { opacity: 0.85; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

#button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Equal widths regardless of label length; wraps on narrow screens */
#button-row button {
  flex: 1 1 150px;
  padding: 12px 10px;
  white-space: nowrap;
}

#ai-btn { background: var(--ai); }

#gemini-btn { background: var(--gemini); }

#reset-btn { background: var(--border); display: block; margin: 24px auto 0; }

/* Results */
#results {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

#candidates-count {
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 20px;
}

#ai-suggestion,
#gemini-suggestion {
  background: rgba(124, 92, 191, 0.12);
  border: 1px solid var(--ai);
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 20px;
}

#gemini-suggestion {
  background: rgba(66, 133, 244, 0.12);
  border-color: var(--gemini);
}

#ai-label,
#gemini-label {
  color: var(--ai);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

#gemini-label { color: var(--gemini); }

#ai-word,
#gemini-word {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

#ai-reasoning,
#gemini-reasoning {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

#results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 24px;
}

/* Each column shares the parent's rows so the heading, description, and
   list line up across columns regardless of description length. */
#results-grid > div {
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 3;
}

@media (max-width: 480px) {
  #results-grid { grid-template-columns: 1fr; row-gap: 24px; }
  #results-grid > div { display: block; grid-row: auto; }
}

#results h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  color: var(--muted);
}

.method-desc {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.45;
}

.star { color: var(--yellow); }

ol { list-style: none; display: flex; flex-direction: column; gap: 3px; }

ol li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 0.88rem;
}

ol li.candidate { background: rgba(106, 170, 100, 0.15); }

.result-word { font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.result-score { color: var(--muted); font-size: 0.78rem; font-family: monospace; }

#error-msg {
  color: #e57373;
  font-size: 0.85rem;
  margin-top: 10px;
}