:root{font-family:system-ui,-apple-system,"Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);font-size:16px;line-height:1.7;--accent:#176653;--line:#aeb9b0;--text:#242b2a;--bg:#f6f5f1;--surface:#ffffff;--hover:#e8eee9;--muted:#52625a;--soft:#e2eae3;--code:#edf0eb;--error:#963329;--on-accent:#ffffff;--selection:#c4e0ce;--focus:#3a886e;--field-line:#7a887e;--scroll:#9baa9d;--quote:#9aa99f;color-scheme:light}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,select,input{min-height:44px}button{cursor:pointer;border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:7px 14px;color:inherit}button:hover{background:var(--hover)}button:disabled{opacity:.55;cursor:wait}button[type=submit],#send{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}input,textarea,select{border:1px solid var(--field-line);border-radius:8px;background:var(--surface);color:inherit;padding:8px;max-width:100%}textarea{resize:vertical;width:100%;min-height:70px;caret-color:var(--accent)}small{font-size:.8rem;color:var(--muted)}p{margin:.6em 0 1em}h1{font-size:1.65rem;line-height:1.4;margin:0 0 .8rem}h2{font-size:1.2rem;line-height:1.5}h3{font-size:1.05rem}a{color:var(--accent);text-underline-offset:3px}::selection{background:var(--selection)}*:focus-visible{outline:3px solid var(--focus);outline-offset:3px}header{height:70px;display:flex;align-items:center;gap:12px;padding:0 24px;background:var(--surface);border-bottom:1px solid var(--line)}header strong{font-size:1rem}#save-status{margin-left:auto;font-size:.8rem;color:var(--muted)}#menu{display:none}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);min-height:calc(100dvh - 70px)}aside{border-right:1px solid var(--line);padding:26px 18px;display:flex;flex-direction:column;gap:12px}aside nav{display:flex;flex-direction:column;margin:8px 0 24px;gap:4px}aside nav button{text-align:left;border-color:transparent;background:transparent}aside nav button:hover,aside nav button.active{background:var(--soft);color:var(--accent)}aside label{font-weight:600;font-size:.85rem}aside p{margin:0;font-size:.85rem;color:var(--muted)}main{width:100%;max-width:840px;margin:0 auto;padding:32px 36px 0;min-width:0;display:flex;flex-direction:column}#chat-view{flex:1}.intro{padding-bottom:20px;border-bottom:1px solid var(--line)}.intro p{font-size:.94rem}#messages{padding:16px 0 20px;overflow-wrap:anywhere}.message{margin:20px 0 30px}.message.user{background:var(--hover);padding:16px 18px;border-radius:12px;margin-left:28px}.message-label{font-weight:600;font-size:.82rem;color:var(--muted);display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.message-label button{font-size:.78rem;min-height:36px;padding:2px 10px}.message-body{white-space:normal;max-width:72ch}.message-body p{white-space:pre-wrap}.message-body code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em;background:var(--soft);padding:2px 4px}.message-body pre{overflow:auto;max-width:100%;background:var(--code);border:1px solid var(--line);border-radius:8px;padding:14px;line-height:1.6;white-space:pre}.message-body pre code{background:none;padding:0}.message-body blockquote{border-left:1px solid var(--quote);padding-left:16px;margin:12px 0;color:var(--muted)}.message-status{color:var(--error);font-size:.8rem}#composer{position:sticky;bottom:0;background:var(--bg);padding:16px 0 max(18px,env(safe-area-inset-bottom));border-top:1px solid var(--line);margin-top:16px}.mode-row{display:flex;gap:12px;align-items:center;margin-bottom:10px}.mode-row label{font-size:.85rem}.compose-bottom{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-top:8px}#notice,#login-error{color:var(--error);font-size:.9rem;white-space:pre-wrap}#detail{padding-bottom:30px}.detail-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:20px}#detail-content{overflow-wrap:anywhere}#detail-content pre{overflow:auto;white-space:pre-wrap;background:var(--code);padding:16px;border-radius:8px}#detail-content textarea{min-height:230px}#detail-content ul{padding-left:22px}#detail-content li{margin-bottom:8px}.login{min-height:100dvh;display:grid;place-items:center;padding:24px}.login form{width:min(100%,420px);display:flex;flex-direction:column;gap:12px}.login small{margin-top:22px}.login button{margin-top:8px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}dialog{border:1px solid var(--line);border-radius:12px;padding:24px;max-width:min(92vw,460px);color:inherit;background:var(--surface)}dialog::backdrop{background:#162b2270}.dialog-actions{display:flex;justify-content:flex-end;gap:12px}#archive{font-size:.8rem}body{scrollbar-color:var(--scroll) var(--bg);scrollbar-width:thin}[hidden]{display:none!important}@media(max-width:760px){header{height:auto;min-height:62px;padding:8px 12px;gap:8px;flex-wrap:wrap}header strong{font-size:.9rem}#menu{display:block;font-size:.85rem;padding:6px 9px}#save-status{font-size:.72rem}header #logout,header #refresh{font-size:.8rem;padding:6px 10px}.layout{display:block;min-height:calc(100dvh - 62px)}aside{display:none;border-right:0;border-bottom:1px solid var(--line);padding:18px}aside.open{display:flex}aside nav{display:grid;grid-template-columns:1fr 1fr;margin:4px 0 12px}main{padding:24px 16px 0}h1{font-size:1.35rem}.message.user{margin-left:12px;padding:12px}.compose-bottom small{font-size:.73rem}#composer{padding-top:12px}.mode-row{gap:8px}.mode-row select{font-size:.9rem;flex:1;min-width:0}.detail-head{align-items:flex-start}#messages{padding-bottom:8px}}

:root[data-theme="dark"]{--accent:#8cdbc0;--line:#506457;--text:#e5ede8;--bg:#141a18;--surface:#1d2622;--hover:#293a30;--muted:#b4c5ba;--soft:#293a30;--code:#202e27;--error:#ffb4a8;--on-accent:#10271d;--selection:#355d49;--focus:#8cdbc0;--field-line:#718979;--scroll:#718979;--quote:#718979;color-scheme:dark}
::placeholder{color:var(--muted);opacity:1}
.theme-control{display:flex;align-items:center;gap:8px;font-size:.85rem}
header{height:auto;min-height:70px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
header .theme-control select{font-size:.85rem}
.account-form{display:flex;flex-direction:column;gap:14px;max-width:460px;margin:16px 0 28px}
.account-form label{display:flex;flex-direction:column;gap:6px}
.account-form input[type=checkbox]{width:24px;align-self:flex-start;accent-color:var(--accent)}
.account-row{border-top:1px solid var(--line);padding:16px 0;margin-top:24px}
.account-row h4{margin:0 0 8px}.form-error{color:var(--error);white-space:pre-wrap}
table{border-collapse:collapse;width:100%;color:var(--text);background:var(--surface)}td,th{border:1px solid var(--line);padding:8px;text-align:left}
button:disabled{cursor:not-allowed}input:disabled,select:disabled{opacity:.7}
@media(max-width:760px){header .theme-control{margin-left:auto}header .theme-control select{max-width:115px}header #save-status{order:2;width:100%;margin-left:0}.account-form{max-width:100%}}
@media(prefers-color-scheme:dark){:root:not([data-theme]){--accent:#8cdbc0;--line:#506457;--text:#e5ede8;--bg:#141a18;--surface:#1d2622;--hover:#293a30;--muted:#b4c5ba;--soft:#293a30;--code:#202e27;--error:#ffb4a8;--on-accent:#10271d;--selection:#355d49;--focus:#8cdbc0;--field-line:#718979;--scroll:#718979;--quote:#718979;color-scheme:dark}
}