* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
button { touch-action: manipulation; }


body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.7;
  overflow-x: hidden;
}

header {
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
  padding: 1rem 0;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  font-size: 1.2rem;
  font-weight: bold;
  color: #1a73e8;
  text-decoration: none;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 {
  font-size: 1.8rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

.description {
  color: #666;
  margin-bottom: 1.5rem;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid #e0e0e0;
}

/* テキストエリア */
.textarea-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.textarea-header label {
  font-size: 0.875rem;
  color: #666;
}

textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: 'Courier New', 'Menlo', monospace;
  resize: vertical;
  transition: border-color 0.2s;
  line-height: 1.7;
}

textarea:focus {
  outline: none;
  border-color: #1a73e8;
}

textarea[readonly] {
  background: #fafafa;
  color: #333;
}

.char-count {
  text-align: right;
  font-size: 0.78rem;
  color: #aaa;
  margin-top: 0.3rem;
}

/* 小ボタン */
.small-btn {
  padding: 0.3rem 0.8rem;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  background: #f9f9f9;
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.small-btn:hover {
  background: #e8f0fe;
  border-color: #1a73e8;
  color: #1a73e8;
}

.small-btn.copied {
  background: #e8f5e9;
  border-color: #4CAF50;
  color: #2e7d32;
}

.output-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.applied-label {
  font-size: 0.78rem;
  color: #1a73e8;
  font-weight: 600;
}

/* 変換ボタン群 */
.conv-group {
  padding-bottom: 1.1rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px solid #f0f0f0;
}

.conv-group.last {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.group-label {
  font-size: 0.78rem;
  color: #999;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.conv-btn {
  padding: 0.45rem 1rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: #f9f9f9;
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  color: #444;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.conv-btn:hover {
  background: #e8f0fe;
  border-color: #1a73e8;
  color: #1a73e8;
}

.conv-btn:active {
  background: #d2e3fc;
}

/* ━━━ Amazonおすすめ ━━━ */
.amazon-card h2 { margin-bottom: 0.25rem; }
.amazon-note { font-size: 0.82rem; color: #999; margin-bottom: 1rem; }
.amazon-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
.amazon-item {
  display: block;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  padding: 0.9rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
}
.amazon-item:hover {
  border-color: #FF9900;
  box-shadow: 0 2px 8px rgba(255,153,0,0.15);
  transform: translateY(-1px);
}
.amazon-item-icon { font-size: 1.7rem; margin-bottom: 0.35rem; }
.amazon-item-name { font-size: 0.88rem; font-weight: bold; margin-bottom: 0.2rem; }
.amazon-item-desc { font-size: 0.76rem; color: #888; line-height: 1.5; margin-bottom: 0.45rem; }
.amazon-item-link { font-size: 0.78rem; color: #FF9900; font-weight: bold; }

footer {
  text-align: center;
  padding: 2rem;
  color: #999;
  font-size: 0.875rem;
}

footer a {
  color: #999;
  text-decoration: none;
  margin: 0 0.5rem;
}

footer a:hover {
  color: #1a73e8;
}

footer p {
  margin-bottom: 0.3rem;
}


/* ─── Tips grid (rank-tracker 統一パターン) ──────── */
.tips-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.tip-item { display: flex; gap: .65rem; }
.tip-icon { font-size: 1.4rem; flex-shrink: 0; }
.tip-text strong { display: block; font-weight: 700; margin-bottom: .15rem; font-size: .88rem; }
.tip-text p { font-size: .8rem; color: #78716c; line-height: 1.55; }
@media (max-width: 600px) {
  h1 { font-size: 1.4rem; }

  .tips-grid { grid-template-columns: 1fr; }
}

.amazon-notice {
  font-size: 0.72rem;
  color: #bbb;
  margin-top: 0.2rem;
}

/* ━━━ FAQ ━━━ */
.faq-list { display: flex; flex-direction: column; }
.faq-item { padding: .9rem 0; border-bottom: 1px solid #f0f0f0; }
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-q { font-size: .9rem; font-weight: 700; color: #1a73e8; margin-bottom: .35rem; }
.faq-a { font-size: .85rem; color: #555; line-height: 1.75; }

/* ━━━ ヒーロー ━━━ */
.hero {
  text-align: center;
  padding: 28px 0 20px;
  margin-bottom: 1.5rem;
}
.hero-icon { font-size: 3rem; margin-bottom: 10px; }
.hero h1 { font-size: 1.8rem; font-weight: bold; margin-bottom: 6px; color: #1e293b; }
.hero .description { color: #666; font-size: 0.95rem; line-height: 1.7; margin-bottom: 0; }
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}
.badge {
  display: inline-block;
  padding: 5px 13px;
  background: #dbeafe;
  color: #1a73e8;
  border: 1.5px solid #bfdbfe;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ━━━ 活用シーン ━━━ */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
}
.scene-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .85rem 1rem;
  background: #f0f6ff;
  border: 1.5px solid #bfdbfe;
  border-radius: 12px;
}
.scene-icon { font-size: 1.7rem; flex-shrink: 0; }
.scene-body strong { display: block; font-size: .88rem; font-weight: 700; color: #1a56db; margin-bottom: .2rem; }
.scene-body p { font-size: .78rem; color: #4b5563; line-height: 1.55; margin: 0; }

/* ━━━ 関連ツール ━━━ */
.related-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: .75rem;
}
.related-tool-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .85rem 1rem;
  border: 1.5px solid #e8edf5;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.related-tool-item:hover { border-color: #1a73e8; box-shadow: 0 2px 8px rgba(26,115,232,.1); }
.related-tool-icon { font-size: 1.6rem; flex-shrink: 0; }
.related-tool-item strong { display: block; font-size: .88rem; font-weight: 700; color: #1a73e8; margin-bottom: .2rem; }
.related-tool-item p { font-size: .76rem; color: #888; line-height: 1.5; margin: 0; }

@media (max-width: 600px) {
  .scene-grid { grid-template-columns: 1fr; }
  .related-tools { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.4rem; }
}