* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif; color: #1a1a1a; background: #fafafa; }
.container { max-width: 960px; margin: 0 auto; padding: 16px; }
.site-header { background: #004f6d; color: #fff; }
.site-header h1 { margin: 0; padding-top: 12px; }
.site-header .sub { margin: 4px 0 12px; opacity: .85; }
.site-footer { margin-top: 40px; padding: 16px 0; background: #f1f5f9; }

form section { background: #fff; border-radius: 8px; padding: 16px; margin: 16px 0; border: 1px solid #e5e7eb; }
form h2 { margin: 0 0 12px; font-size: 20px; }
form h3 { margin: 8px 0 8px; font-size: 16px; opacity: .9; }

.field { display: flex; flex-direction: column; gap: 6px; margin: 8px 0; }
.field label { font-size: 14px; color: #334155; }
.field input, .field textarea, .field select { border: 1px solid #cbd5e1; border-radius: 6px; padding: 10px 12px; font-size: 14px; background: #fff; }
.field input:focus, .field textarea:focus, .field select:focus { outline: 2px solid #0ea5e9; outline-offset: 1px; }
.field .radios { display: flex; gap: 16px; align-items: center; }
.checkbox { display: flex; align-items: center; gap: 8px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 720px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.actions { display: flex; justify-content: flex-end; margin-top: 8px; }
.btn-primary { background: #0ea5e9; color: #fff; border: none; border-radius: 8px; padding: 10px 16px; font-size: 14px; cursor: pointer; }
.btn-primary:hover { background: #0284c7; }
.btn-secondary { background: #e2e8f0; color: #0f172a; border: none; border-radius: 8px; padding: 8px 12px; font-size: 14px; cursor: pointer; }
.btn-secondary:hover { background: #cbd5e1; }
.remove-companion { background: transparent; border: 1px solid #ef4444; color: #ef4444; border-radius: 8px; padding: 4px 8px; cursor: pointer; }
.remove-companion:hover { background: #fee2e2; }

.companion { border: 1px dashed #cbd5e1; padding: 12px; border-radius: 8px; margin: 12px 0; background: #fbfdff; }
.companion-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }

.form-message { margin-top: 8px; font-size: 14px; color: #0f172a; }
.form-message.error { color: #dc2626; }
.form-message.success { color: #16a34a; }
.help { margin-top: 4px; font-size: 12px; color: #64748b; }

a { color: #0ea5e9; text-decoration: none; }
a:hover { text-decoration: underline; }

.notice { background: #fffbeb; border: 1px solid #facc15; color: #7c6f05; padding: 12px 16px; border-radius: 8px; margin: 16px 0; }