* { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; }
body {
  margin: 0;
  font-family: -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
  background: #f5f6f8;
  color: #1f2430;
}
.st-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  padding: 14px 24px;
  background: #fff;
  border-bottom: 1px solid #e3e5ea;
}
.st-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; text-decoration: none; color: #1f2430; white-space: nowrap; }
.st-logo-icon { flex-shrink: 0; }
.st-logo-word { font-size: 18px; letter-spacing: -0.01em; }
.st-logo-word-a { color: #1f2430; }
.st-logo-word-b { color: #059669; }
.st-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; }
.st-nav a { text-decoration: none; color: #4a5568; font-size: 14px; }
.st-main { max-width: 900px; margin: 0 auto; padding: 32px 20px; }

.st-card {
  background: #fff;
  border: 1px solid #e3e5ea;
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 20px;
}

.st-form label { display: block; margin: 14px 0 6px; font-size: 14px; font-weight: 600; }
.st-form input[type=text], .st-form input[type=email], .st-form input[type=password], .st-form input[type=tel] {
  width: 100%; padding: 10px 12px; border: 1px solid #cbd2d9; border-radius: 6px; font-size: 14px;
}
.st-checkbox-group label { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; margin-right: 16px; }
.st-checkbox-group input { width: auto; }

.st-btn {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 22px;
  background: #3454d1;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.st-btn:hover { background: #2a44ac; }

.st-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.st-table-scroll.nowrap .st-table th,
.st-table-scroll.nowrap .st-table td { white-space: nowrap; }

.st-error { color: #c0392b; font-size: 13px; margin-top: 8px; }

.st-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.st-table th, .st-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #eef0f3; font-size: 13px; vertical-align: top; }

.st-usage-bar { background: #eef0f3; border-radius: 6px; height: 10px; overflow: hidden; margin-top: 6px; }
.st-usage-bar-fill { background: #3454d1; height: 100%; }
.st-usage-bar-fill.warn { background: #d9822b; }
.st-usage-bar-fill.danger { background: #c0392b; }

.st-code {
  display: block;
  background: #1f2430;
  color: #c9d1d9;
  padding: 14px 16px;
  border-radius: 8px;
  font-family: monospace;
  font-size: 13px;
  overflow-x: auto;
  white-space: pre;
}

.st-tabs { display: flex; gap: 8px; margin: 16px 0; flex-wrap: wrap; }
.st-tabs a {
  padding: 6px 14px; border-radius: 20px; background: #eef0f3; color: #333;
  text-decoration: none; font-size: 13px;
}
.st-tabs a.active { background: #3454d1; color: #fff; }

.st-badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 11px; background: #eef0f3; }
.st-badge.manual { background: #fdecc8; color: #7a5300; }

.st-note { font-size: 13px; color: #667085; margin-top: 8px; }

.st-plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
@media (max-width: 640px) {
  .st-plan-grid { grid-template-columns: 1fr; }
}
.st-plan-card {
  background: #fff; border: 1px solid #e3e5ea; border-radius: 10px; padding: 20px;
  display: flex; flex-direction: column;
}
.st-plan-card.current { border-color: #3454d1; box-shadow: 0 0 0 1px #3454d1; }
.st-plan-card h2 { margin: 0 0 4px; font-size: 18px; }
.st-plan-price { font-size: 26px; font-weight: 700; margin: 4px 0 14px; }
.st-plan-price span { font-size: 13px; font-weight: 400; color: #667085; }
.st-plan-features { list-style: none; padding: 0; margin: 0 0 16px; flex-grow: 1; }
.st-plan-features li { font-size: 13px; padding: 5px 0; border-bottom: 1px solid #eef0f3; }

.st-copy-btn { background: #475569; }
.st-copy-btn:hover { background: #334155; }

.st-guide { margin-top: 16px; }
.st-guide-badge {
  font-size: 13px; padding: 10px 14px; border-radius: 8px; margin: 0 0 14px;
}
.st-guide-badge.ok { background: #e7f6ec; color: #216e39; }
.st-guide-badge.warn { background: #fef3e2; color: #8a5300; }
.st-guide-steps { margin: 0; padding-left: 22px; }
.st-guide-steps li { font-size: 14px; line-height: 1.7; margin-bottom: 8px; }
.st-guide-steps code, .st-guide-badge code {
  background: #eef0f3; padding: 1px 5px; border-radius: 4px; font-size: 12px;
}

.st-check-row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.st-check-input {
  flex: 1 1 260px; min-width: 0; padding: 10px 12px;
  border: 1px solid #cbd2d9; border-radius: 6px; font-size: 14px;
}
.st-check-result {
  margin-top: 14px; padding: 12px 16px; border-radius: 8px; font-size: 14px; line-height: 1.6;
}
.st-check-result.loading { background: #eef0f3; color: #667085; }
.st-check-result.ok { background: #e7f6ec; color: #216e39; }
.st-check-result.warn { background: #fef3e2; color: #8a5300; }
.st-check-result.err { background: #fdecea; color: #b42318; }
@media (max-width: 640px) {
  .st-check-row .st-btn { width: 100%; }
}