:root{color-scheme:light;--accent:#254c64;--paper:#f5f7f9;--ink:#172b3a;font-family:system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}header{position:sticky;top:0;display:flex;align-items:center;gap:16px;padding:16px max(16px,env(safe-area-inset-right)) 16px max(16px,env(safe-area-inset-left));background:#fff;border-bottom:1px solid #dbe4e9;z-index:1}header div{flex:1}header strong{display:block;font-size:18px}header small,.hint{color:#607683;font-size:13px}button{cursor:pointer;min-height:44px;font:inherit;border:1px solid #c9d7df;border-radius:12px;padding:10px 16px;background:#fff;color:var(--ink)}header button{border:0;font-size:26px;min-width:44px}main{max-width:760px;margin:auto;padding:20px 16px}label{display:block;font-size:13px;font-weight:600;margin-bottom:8px}input,textarea{font:inherit;width:100%;border:1px solid #bdcdd7;border-radius:12px;background:#fff;padding:14px;color:var(--ink)}input{margin-bottom:18px}details{background:white;border:1px solid #dbe4e9;border-radius:14px;margin-bottom:10px;padding:16px}summary{cursor:pointer;font-weight:600;min-height:32px}details p{white-space:pre-wrap;line-height:1.65}button.primary{display:block;width:100%;margin-top:18px;background:var(--accent);color:white;border-color:var(--accent);font-weight:600}button:disabled{opacity:.5;cursor:wait}#notice{font-size:14px;color:#805018;white-space:pre-wrap}#messages{display:flex;flex-direction:column;gap:12px;padding:12px 0;min-height:160px}.bubble{max-width:88%;padding:14px;border-radius:14px;background:white;border:1px solid #dbe4e9;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.6}.bubble.customer{align-self:flex-end;background:#e2eef4}.bubble small{display:block;margin-bottom:4px;color:#607683}.bubble time{display:block;font-size:11px;color:#607683;margin-top:6px}footer{padding:24px;text-align:center;font-size:12px;color:#607683}form{position:sticky;bottom:0;padding:12px 0 max(12px,env(safe-area-inset-bottom));background:var(--paper)}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #76a7c2;outline-offset:2px}[hidden]{display:none!important}