:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #687086;
  --border: #d9deea;
  --accent: #3f6df6;
  --accent-hover: #3259ca;
  --success-bg: #e9f8ef;
  --success-text: #1d6b3f;
  --error-bg: #fff0f0;
  --error-text: #9f2d2d;
  --shadow: 0 10px 30px rgba(24, 39, 75, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #f8f9fd 0%, #eef2fb 100%);
  color: var(--text);
}

.app {
  width: min(900px, calc(100% - 32px));
  margin: 32px auto 48px;
}

.hero {
  margin-bottom: 20px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.status-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 20px 0;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
}

.game-card,
.help-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.game-card {
  margin-bottom: 20px;
}

.prompt-wrap {
  text-align: center;
  margin-bottom: 22px;
}

.prompt-label {
  color: var(--muted);
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.base-word {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.guess-form {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  align-items: stretch;
}

.guess-form input {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  height: 60px;
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 0 18px;
  font-size: 18px;
  line-height: 1.2;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.guess-form input:focus {
  border-color: var(--accent);
}

button {
  border: none;
  border-radius: 14px;
  padding: 0 18px;
  min-height: 60px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: white;
}

button:hover {
  background: var(--accent-hover);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.secondary-btn {
  background: #eef3ff;
  color: #2f4eae;
}

.secondary-btn:hover {
  background: #dde7ff;
}

.message {
  min-height: 52px;
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 18px;
  background: #f4f6fb;
  color: var(--muted);
  line-height: 1.4;
}

.message.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.message.error {
  background: var(--error-bg);
  color: var(--error-text);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.results-header h2,
.help-card h2 {
  margin: 0;
  font-size: 1.2rem;
}

.remaining-count {
  color: var(--muted);
  font-size: 0.95rem;
}

.found-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.found-list li {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  background: #fafbff;
}

.compound-line {
  font-weight: 700;
  margin-bottom: 4px;
}

.partner-line {
  color: var(--muted);
  font-size: 0.95rem;
}

.help-card p {
  color: var(--muted);
  line-height: 1.5;
}

.sr-only {
  position: absolute;
  left: -9999px;
}

#guess-input {
  font-size: 18px;
  height: 60px;
}

@media (max-width: 900px) {
  .status-bar {
    grid-template-columns: 1fr;
  }

  .guess-form {
    flex-direction: column;
    gap: 14px;
  }

  .guess-form input,
  #guess-input {
    width: 100%;
    height: 72px;
    min-height: 72px;
    font-size: 20px;
    padding: 0 20px;
    border-radius: 18px;
  }

  .guess-form button {
    width: 100%;
    min-height: 64px;
    font-size: 1.15rem;
  }

  .actions {
    flex-direction: column;
  }

  .actions button {
    width: 100%;
    min-height: 54px;
  }
}