:root{
  --green:#4d9c08;
  --green-dark:#377400;
  --soft:#f5fbef;
  --line:#dfe7d8;
  --text:#222;
  --muted:#66705f;
  --white:#fff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:#f4f7f1;color:var(--text);font-family:"Hiragino Maru Gothic ProN","Hiragino Sans",Meiryo,sans-serif}
body{min-height:100vh}
img{max-width:100%;height:auto;display:block}
.chat-shell{max-width:860px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:#fff;box-shadow:0 0 30px rgba(0,0,0,.06)}
.chat-header{padding:14px 14px 0;background:linear-gradient(180deg,#eef8e7,#fff)}
.chat-back{display:inline-block;text-decoration:none;color:var(--green-dark);font-weight:700;margin-bottom:10px}
.chat-hero{display:flex;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px 14px;box-shadow:0 10px 24px rgba(77,156,8,.08)}
.chat-hero-image{width:84px;flex:0 0 84px}
.chat-hero-image img{width:84px;height:84px;object-fit:contain;border-radius:18px;background:#f7faf5}
.chat-title{font-size:1.25rem;font-weight:800;line-height:1.3;color:var(--green-dark)}
.chat-subtitle{margin:6px 0 0;line-height:1.6;font-size:.95rem}
.chat-main{flex:1;padding:16px 14px 110px}
.chat-messages{display:flex;flex-direction:column;gap:14px}
.bubble-row{display:flex;gap:10px;align-items:flex-start}
.bubble-row.is-user{justify-content:flex-end}
.avatar{width:44px;flex:0 0 44px}
.avatar img{width:44px;height:44px;object-fit:cover;border-radius:50%;background:#f0f7ea;border:1px solid var(--line)}
.bubble-wrap{max-width:min(84%,640px)}
.speaker{font-size:.75rem;color:var(--muted);margin:0 0 4px 2px}
.bubble{padding:12px 14px;border-radius:18px;line-height:1.8;word-break:break-word;box-shadow:0 8px 18px rgba(0,0,0,.06)}
.is-assistant-bubble{background:var(--soft);border:1px solid #d6e8c9;border-top-left-radius:6px}
.is-user-bubble{background:var(--green);color:#fff;border-top-right-radius:6px}
.sub-note{display:block;margin-top:6px;color:#536147;font-size:.85rem}
.quick-wrap{margin-top:20px;padding-top:12px;border-top:1px dashed var(--line)}
.quick-title{font-size:.82rem;font-weight:700;color:var(--muted);margin-bottom:8px}
.quick-buttons{display:flex;flex-wrap:wrap;gap:8px}
.quick-btn{border:1px solid #c9ddbb;background:#fff;border-radius:999px;padding:10px 14px;cursor:pointer;color:var(--green-dark);font-weight:700}
.chat-form{position:fixed;left:50%;transform:translateX(-50%);bottom:0;width:min(860px,100%);display:flex;gap:10px;align-items:flex-end;padding:12px 14px calc(12px + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-top:1px solid var(--line)}
.chat-form textarea{flex:1;resize:none;min-height:52px;max-height:160px;border:1px solid #bfd6b0;border-radius:18px;padding:14px 16px;font-size:16px;line-height:1.5;outline:none}
.chat-form textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(77,156,8,.12)}
.chat-form button{border:none;background:var(--green);color:#fff;font-weight:800;border-radius:18px;padding:0 18px;height:52px;cursor:pointer;white-space:nowrap;box-shadow:0 8px 18px rgba(77,156,8,.22)}
.chat-form button:disabled{opacity:.55;cursor:not-allowed}
.loading-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#7ca65d;margin-right:4px;animation:blink 1s infinite alternate}
.loading-dot:nth-child(2){animation-delay:.2s}.loading-dot:nth-child(3){animation-delay:.4s}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;border:0!important}
@keyframes blink{from{opacity:.3}to{opacity:1}}
@media (max-width:640px){
  .chat-hero{align-items:flex-start}
  .chat-hero-image{width:72px;flex-basis:72px}
  .chat-hero-image img{width:72px;height:72px}
  .bubble-wrap{max-width:calc(100vw - 92px)}
  .chat-main{padding:14px 10px 108px}
  .chat-form{padding:10px 10px calc(10px + env(safe-area-inset-bottom))}
  .chat-form button{padding:0 14px}
}