:root{--bg:#f7f5f2;--panel:#fff;--side:#eeeae5;--ink:#24211f;--muted:#766f69;--line:#ddd7d1;--accent:#c45f3b;--danger:#a84632;--shadow:0 20px 60px rgba(54,43,36,.18)}*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Tahoma,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}button,input,textarea,select{font:inherit}.app-shell{height:100%;display:grid;grid-template-columns:260px 1fr}.sidebar{background:var(--side);border-left:1px solid var(--line);padding:18px 16px;display:grid;grid-template-rows:auto auto 1fr auto;gap:16px;min-height:0}.brand{display:flex;gap:11px;align-items:center}.brand-mark,.empty-logo{display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:700;border-radius:14px}.brand-mark{width:44px;height:44px;font-size:24px}.brand h1{margin:0;font-size:25px}.brand p{margin:3px 0 0;color:var(--muted);font-size:12px}.primary,.secondary,.ghost,.chat-actions button,.settings-tabs button{border:0;cursor:pointer;padding:11px 16px;font-weight:700}.primary{background:var(--accent);color:#fff}.secondary{background:#514b47;color:#fff}.ghost{background:transparent;border:1px solid var(--line)}.wide{width:100%}.conversation-list{overflow:auto;display:flex;flex-direction:column;gap:6px}.conversation-item{padding:10px 11px;border:1px solid transparent;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background:transparent;text-align:right}.conversation-item:hover,.conversation-item.active{background:#fff;border-color:var(--line)}.sidebar-footer{display:grid;gap:8px}.sidebar-footer small{color:var(--muted);line-height:1.6}.main{padding:18px 26px 20px;min-width:0;min-height:0;display:grid;grid-template-rows:auto auto 1fr auto auto}.mobile-bar{display:none}.provider-tabs{direction:ltr;display:flex;gap:0;margin-bottom:12px}.provider-tab{border:1px solid var(--line);background:#fff;padding:7px 14px;cursor:pointer}.provider-tab.active{background:var(--ink);color:#fff}.chat-header{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:12px}.chat-header h2{margin:0 0 4px;font-size:23px}.chat-header span{color:var(--muted);font-size:12px}.model-tools{display:flex;direction:ltr}.model-tools select{width:min(380px,42vw);padding:10px;border:1px solid var(--line);background:#fff}.icon-btn{border:0;background:transparent;font-size:22px;cursor:pointer}.icon-btn.dark{background:#514b47;color:#fff;width:42px;margin-left:7px}.messages{border:1px dotted #928a83;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:12px;min-height:0}.empty-state{margin:auto;text-align:center;color:var(--muted)}.empty-logo{width:64px;height:64px;margin:0 auto 14px;font-size:34px}.empty-state h3{color:var(--ink);margin:0 0 8px}.message{max-width:min(760px,88%);padding:15px 17px;border-radius:14px;background:#fff;align-self:flex-start;line-height:1.8;white-space:pre-wrap}.message.user{background:#f1dfd6;align-self:flex-end}.message-header{display:flex;justify-content:space-between;gap:20px;margin-bottom:7px;color:#514b47;font-size:12px}.message-model{color:#928a83;font-size:10px;direction:ltr}.status-row{display:flex;justify-content:space-between;align-items:center;min-height:38px;color:var(--muted);font-size:12px}.chat-actions{display:flex;gap:5px}.chat-actions button{padding:7px 10px;background:#766f69;color:#fff;font-size:11px}.danger{background:var(--danger)!important;color:#fff!important}.composer{border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px;display:flex;gap:9px}.composer textarea{flex:1;resize:none;border:0;outline:0;min-height:48px;max-height:160px;padding:10px;line-height:1.7}.send{width:88px;border:0}.stop{border:0;padding:0 16px}.modal-backdrop{position:fixed;inset:0;background:rgba(36,33,31,.45);display:grid;place-items:center;padding:20px;z-index:10}.modal-backdrop[hidden]{display:none}.modal{width:min(740px,100%);max-height:94vh;overflow:auto;background:var(--bg);box-shadow:var(--shadow);padding:24px}.modal header{display:flex;justify-content:space-between;align-items:center}.modal h2{margin:0 0 16px}.modal label{display:grid;gap:6px;margin-bottom:13px;color:#514b47}.modal input,.modal textarea{padding:11px;border:1px solid var(--line);background:#fff}.check{display:flex!important;align-items:center}.settings-tabs{display:flex;direction:ltr;margin:14px 0}.settings-tabs button{flex:1;border:1px solid var(--line);background:#fff}.settings-tabs button.active{background:var(--ink);color:#fff}.provider-settings{display:grid;grid-template-columns:1fr 150px;gap:0 16px}.provider-settings label:last-child{grid-column:1/-1}.notice{color:var(--muted);font-size:12px}.modal-actions{display:flex;justify-content:flex-end;align-items:center;gap:8px}.modal-actions span{margin-left:auto;color:var(--muted);font-size:12px}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ink);color:#fff;padding:11px 18px;border-radius:9px;transition:.2s;z-index:30}.toast.show{transform:translateX(-50%) translateY(0)}
@media(max-width:760px){.app-shell{display:block}.sidebar{position:fixed;inset:0 auto 0 0;width:min(86vw,320px);z-index:20;transform:translateX(-105%);transition:.2s;box-shadow:var(--shadow)}.sidebar.open{transform:translateX(0)}.main{height:100%;padding:0 12px 12px;grid-template-rows:auto auto auto 1fr auto auto}.mobile-bar{display:flex;justify-content:space-between;align-items:center;height:54px}.provider-tabs{overflow:auto;margin-bottom:8px}.provider-tab{flex:1;white-space:nowrap;padding:9px}.chat-header{align-items:flex-start;flex-direction:column}.chat-header h2{font-size:19px}.model-tools{width:100%}.model-tools select{width:100%;flex:1}.messages{padding:10px}.message{max-width:94%;padding:12px}.chat-actions{overflow:auto;max-width:68vw}.chat-actions button{white-space:nowrap}.composer{padding:7px}.send{width:72px}.modal{padding:18px}.provider-settings{grid-template-columns:1fr}.provider-settings label:last-child{grid-column:auto}.modal-actions{flex-wrap:wrap}.modal-actions span{width:100%;margin:0}.install-button{display:block}}