* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', 'Yu Gothic UI', sans-serif; line-height: 1.7; color: #1a1a2e; background: #f8f9fa; }

.manual-header { background: #1e40af; color: #fff; padding: 16px 24px; }
.manual-header a { color: #bfdbfe; text-decoration: none; font-size: 0.85rem; }
.manual-header h1 { font-size: 1.4rem; margin-top: 4px; }

.manual-container { display: flex; max-width: 1000px; margin: 0 auto; padding: 24px; gap: 24px; }
.manual-nav { width: 220px; flex-shrink: 0; }
.manual-nav h2 { font-size: 0.9rem; color: #64748b; margin-bottom: 8px; }
.manual-nav ul { list-style: none; }
.manual-nav li { margin-bottom: 4px; }
.manual-nav a { color: #1e40af; text-decoration: none; font-size: 0.9rem; display: block; padding: 4px 8px; border-radius: 4px; }
.manual-nav a:hover { background: #eff6ff; }
.manual-nav li.planned a { color: #94a3b8; pointer-events: none; font-style: italic; }
.manual-nav li.planned a:hover { background: transparent; }

.manual-content { flex: 1; background: #fff; border-radius: 8px; padding: 24px 28px; border: 1px solid #e2e8f0; }
.manual-content h2 { font-size: 1.25rem; color: #1e3a5f; margin-bottom: 14px; border-left: 3px solid #3b82f6; padding-left: 10px; }
.manual-content h3 { font-size: 1.05rem; color: #1e3a5f; margin: 22px 0 8px; }
.manual-content p { margin-bottom: 12px; font-size: 0.94rem; }
.manual-content ol, .manual-content ul { padding-left: 22px; margin: 8px 0 16px; }
.manual-content li { font-size: 0.92rem; margin-bottom: 6px; }
.manual-content img { max-width: 100%; border: 1px solid #e2e8f0; border-radius: 4px; margin: 12px 0; }
.manual-content code { background: #eef2f7; padding: 1px 6px; border-radius: 3px; font-size: 0.88em; }

.nav-links { font-size: 0.85rem; margin-bottom: 16px; }
.nav-links a { color: #3b82f6; text-decoration: none; margin-right: 16px; }
.nav-links a:hover { text-decoration: underline; }

.note { background: #f1f5f9; border-left: 3px solid #94a3b8; padding: 12px 16px; font-size: 0.88rem; color: #475569; margin: 16px 0; border-radius: 4px; }
.warn { background: #fef3c7; border-left: 3px solid #f59e0b; padding: 12px 16px; font-size: 0.9rem; color: #92400e; margin: 16px 0; border-radius: 4px; }
.ok   { background: #f0fdf4; border-left: 3px solid #10b981; padding: 12px 16px; font-size: 0.9rem; color: #166534; margin: 16px 0; border-radius: 4px; }

table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.9rem; }
th, td { border: 1px solid #e2e8f0; padding: 8px 12px; text-align: left; vertical-align: top; }
th { background: #f1f5f9; color: #1e3a5f; font-weight: 600; }

.screenshot-placeholder { background: #f1f5f9; border: 2px dashed #94a3b8; border-radius: 8px; padding: 40px 20px; text-align: center; color: #64748b; font-size: 0.85rem; margin: 12px 0; }

.section-ja, .section-en { display: none; }
.section-ja.visible, .section-en.visible { display: block; }

.lang-toggle { position: fixed; top: 12px; right: 24px; z-index: 10; }
.lang-toggle button { background: #f1f5f9; border: 1px solid #e2e8f0; padding: 5px 14px; border-radius: 4px; cursor: pointer; font-size: 0.85rem; color: #1e3a5f; }
.lang-toggle button.active { background: #1e40af; color: #fff; border-color: #1e40af; }

.footer { text-align: center; padding: 20px; border-top: 1px solid #e2e8f0; font-size: 0.8rem; color: #94a3b8; margin-top: 24px; }

.label-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.dot-red { background: #ef4444; }
.dot-amber { background: #f59e0b; }
.dot-blue { background: #3b82f6; }
.dot-green { background: #10b981; }
.dot-purple { background: #8b5cf6; }
.dot-gray { background: #94a3b8; }

@media (max-width: 700px) {
  .manual-container { flex-direction: column; padding: 16px; }
  .manual-nav { width: 100%; }
}