:root {
  --bg: #12131a;
  --panel: #1c1e29;
  --accent: #8fd3ff;
  --text: #eef0f5;
  --text-dim: #9aa0b4;
  --border: #2c2f3d;
  --error: #ff8a8a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  min-height: 100%;
}

.app-header {
  padding: 32px 20px 16px;
  text-align: center;
}

.app-header h1 {
  margin: 0 0 6px;
  font-size: 1.5rem;
  letter-spacing: 0.05em;
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.app-main {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.search-form {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.code-input {
  flex: 1;
  min-width: 0;
  padding: 14px 16px;
  font-size: 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
}

.code-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.search-button {
  padding: 14px 20px;
  font-size: 1rem;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #0a1620;
  font-weight: 700;
  cursor: pointer;
}

.search-button:active {
  transform: scale(0.97);
}

.history-bar {
  margin-bottom: 12px;
}

.back-button {
  padding: 8px 14px;
  font-size: 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
}

.back-button:active {
  transform: scale(0.97);
}

.result {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  min-height: 120px;
}

.result-title {
  margin: 0 0 10px;
  font-size: 1.2rem;
  color: var(--accent);
  min-height: 1.4em;
}

.result-body {
  margin: 0;
  line-height: 1.8;
  font-size: 1rem;
  white-space: pre-wrap;
  min-height: 1.8em;
}

.result-body .cursor {
  display: inline-block;
  width: 0.5em;
  animation: blink 0.9s step-start infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.related-wrap {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.related-label {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: rgba(143, 211, 255, 0.08);
  color: var(--accent);
  font-size: 0.9rem;
  cursor: pointer;
}

.related-chip:active {
  transform: scale(0.96);
}

.error {
  text-align: center;
  color: var(--error);
  font-size: 0.95rem;
}

@media (prefers-reduced-motion: reduce) {
  .result-body .cursor {
    animation: none;
  }
}