:root{color-scheme:dark;--bg:#0b141a;--panel:#111b21;--panel2:#202c33;--line:#26343d;--text:#e9edef;--muted:#8696a0;--accent:#00a884;--bubble:#005c4b;--mine:#1f2c34;--danger:#ff6b6b;font-family:system-ui,-apple-system,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px}.app-shell{height:100dvh;min-height:500px;display:grid;grid-template-columns:300px minmax(0,1fr);max-width:1500px;margin:auto;background:var(--panel)}button,input,textarea{font:inherit}.sidebar{border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.brand{height:70px;display:flex;align-items:center;gap:12px;padding:0 18px;border-bottom:1px solid var(--line)}.brand strong{display:block;font-size:16px}.brand small,.chat-title small{display:block;color:var(--muted);margin-top:3px}.brand-mark,.modal-mark,.welcome-logo{display:grid;place-items:center;background:var(--accent);color:#052b23;border-radius:13px;width:38px;height:38px;font-size:24px;font-weight:800}.icon-btn{margin-left:auto;background:transparent;color:var(--muted);border:0;font-size:20px;padding:8px;cursor:pointer}.sidebar-tools{padding:12px}.sidebar-tools input,.modal input{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:11px;color:var(--text);outline:none}.section-label{padding:12px 16px;color:var(--muted);font-size:11px;letter-spacing:1px;font-weight:700;display:flex;justify-content:space-between;align-items:center}.tiny-btn,.text-btn{background:none;border:0;color:var(--accent);cursor:pointer}.device-list{overflow:auto;flex:1}.empty-note{color:var(--muted);padding:20px;text-align:center}.sidebar-footer{border-top:1px solid var(--line);padding:14px;display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px}.status-dot{width:8px;height:8px;border-radius:50%;background:#e0a33a}.chat-panel{display:flex;flex-direction:column;min-width:0;background-color:#0b141a;background-image:radial-gradient(#18252c 1px,transparent 1px);background-size:18px 18px}.chat-header{height:70px;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 20px;gap:12px}.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#315b52;color:white;font-weight:700}.chat-title{flex:1}.header-actions{display:flex}.messages{flex:1;overflow:auto;padding:24px clamp(14px,5vw,70px);display:flex;flex-direction:column;gap:10px}.welcome{margin:auto;text-align:center;max-width:390px;color:var(--muted)}.welcome-logo{width:64px;height:64px;margin:0 auto 18px;border-radius:20px;font-size:38px}.welcome h1{color:var(--text);font-size:25px;margin:0 0 8px}.welcome p{line-height:1.6}.secure-label{display:inline-block;margin-top:14px;padding:8px 12px;border-radius:20px;background:#17252b;font-size:12px}.bubble{max-width:min(75%,560px);align-self:flex-end;background:var(--bubble);padding:10px 13px;border-radius:10px 3px 10px 10px;line-height:1.5;overflow-wrap:anywhere}.bubble.received{align-self:flex-start;background:var(--mine);border-radius:3px 10px 10px 10px}.bubble time{display:block;text-align:right;color:#b6d6cc;font-size:10px;margin-top:5px}.composer{margin:0 18px;display:flex;align-items:end;gap:10px;background:var(--panel2);border-radius:12px;padding:8px 10px}.composer textarea{resize:none;max-height:130px;flex:1;background:transparent;border:0;color:var(--text);outline:0;padding:8px;line-height:1.4}.attach-btn{font-size:25px;color:var(--muted);cursor:pointer;padding:4px 8px}.send-btn{width:38px;height:38px;border:0;border-radius:50%;background:var(--accent);color:#032b22;font-size:19px;cursor:pointer}.composer-hint{text-align:center;color:var(--muted);font-size:10px;padding:7px}.notice{margin:10px 18px 0;padding:10px;border-radius:8px;background:#253c35;color:#a9e6d2}.hidden{display:none!important}.modal{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:16px;padding:26px;width:min(420px,calc(100% - 28px));box-shadow:0 20px 80px #0009}.modal::backdrop{background:#0009;backdrop-filter:blur(3px)}.modal h2{margin:10px 0}.modal p{color:var(--muted);line-height:1.5}.modal label{display:block;margin:15px 0;color:var(--muted);font-size:12px}.modal label input{display:block;margin-top:7px}.primary-btn,.secondary-btn{width:100%;padding:12px;border:0;border-radius:8px;background:var(--accent);color:#052b23;font-weight:700;cursor:pointer;margin-top:10px}.secondary-btn{background:var(--panel2);color:var(--text);border:1px solid var(--line)}.error-text{color:var(--danger)!important;min-height:18px}.pair-code{font-size:32px;letter-spacing:10px;text-align:center;padding:18px;background:var(--panel2);border-radius:10px;font-weight:800}.settings-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted)}.wide-modal{width:min(650px,calc(100% - 28px))}.file-history{max-height:50vh;overflow:auto}.transfer-tray{margin:0 18px 8px;padding:10px;background:var(--panel);border:1px solid var(--line);border-radius:8px}.transfer-item{font-size:12px;color:var(--muted);padding:5px}.progress{height:4px;background:var(--line);border-radius:5px;margin-top:5px;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent);width:0}.file-card{display:flex;align-items:center;gap:12px;padding:12px;border-bottom:1px solid var(--line)}.file-card strong{display:block}.file-card small{color:var(--muted)}.file-card button{margin-left:auto;background:var(--panel2);border:1px solid var(--line);color:var(--text);border-radius:7px;padding:7px 10px;cursor:pointer}.light{--bg:#eef2f3;--panel:#fff;--panel2:#f0f3f4;--line:#dce3e5;--text:#17252b;--muted:#65777f;--mine:#e4eaed}.light .chat-panel{background-color:#e9eff0;background-image:radial-gradient(#d6e0e2 1px,transparent 1px)}.light .secure-label{background:#edf5f2}
@media(max-width:680px){.app-shell{grid-template-columns:76px minmax(0,1fr)}.brand{padding:0;justify-content:center}.brand>div:nth-child(2),.brand .icon-btn,.sidebar-tools,.section-label,.device-list,.sidebar-footer span:not(.status-dot),.sidebar-footer .tiny-btn{display:none}.sidebar-footer{justify-content:center}.brand-mark{flex-shrink:0}.chat-header{padding:0 12px}.messages{padding:16px 10px}.bubble{max-width:88%}.composer{margin:0 8px}.composer-hint{font-size:9px}.sidebar{align-items:stretch}}