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

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #e5e5e5;
  background: #121212;
  min-height: 100vh;
  padding: 0.5rem;
  -webkit-tap-highlight-color: transparent;
}

.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.back-link {
  font-size: 0.95rem;
  color: #a0a0a0;
  text-decoration: none;
}

.back-link:hover,
.back-link:focus {
  color: #f5f5f5;
  text-decoration: underline;
}

.header h1 {
  margin: 0;
  font-size: 1.75rem;
  color: #f5f5f5;
}

.header-right {
  margin-left: auto;
}

#new-game {
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid #505050;
  border-radius: 8px;
  background: #252525;
  color: #e5e5e5;
  cursor: pointer;
}

#new-game:hover,
#new-game:focus {
  background: #333;
  border-color: #666;
}

.main {
  max-width: 420px;
  margin: 0 auto;
}

#word {
  font-size: clamp(1.5rem, 5vmin, 2rem);
  letter-spacing: 0.2em;
  text-align: center;
  margin-bottom: 1rem;
  min-height: 2.5rem;
  color: #f5f5f5;
}

#wrong {
  text-align: center;
  margin-bottom: 1rem;
  color: #a0a0a0;
  font-size: 0.95rem;
}

.letter-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin-bottom: 1.5rem;
}

.letter-btn {
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid #505050;
  border-radius: 6px;
  background: #252525;
  color: #e5e5e5;
  cursor: pointer;
}

.letter-btn:hover:not(:disabled) {
  background: #333;
  border-color: #666;
}

.letter-btn.used {
  cursor: default;
}

.letter-btn.correct {
  background: #2d5a3d;
  border-color: #3d7a4d;
  color: #a7f3d0;
}

.letter-btn.wrong {
  background: #4a2525;
  border-color: #5a3535;
  color: #fca5a5;
}

#win-message,
#lose-message {
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

#win-message {
  color: #86efac;
}

#lose-message {
  color: #fca5a5;
}

#win-message[hidden],
#lose-message[hidden] {
  display: none;
}

#word-reveal-label {
  text-align: center;
  font-size: 1rem;
  color: #a0a0a0;
  margin-bottom: 1rem;
}

#word-reveal-label[hidden] {
  display: none;
}

.hint {
  margin: 0;
  font-size: 0.85rem;
  color: #707070;
  text-align: center;
}