:root{--bg:#ffffff;--sidebar-bg:#f8fafc;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;--card-bg:#ffffff}
[data-theme="dark"]{--bg:#020617;--sidebar-bg:#0f172a;--text:#f1f5f9;--muted:#94a3b8;--border:#1e293b;--card-bg:#020617}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background-color:var(--bg);color:var(--text);font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;height:100vh;width:100vw;display:flex;overflow:hidden}
aside{width:300px;background-color:var(--sidebar-bg);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:24px;transition:transform .3s cubic-bezier(.4,0,.2,1);z-index:100}
aside.hidden{transform:translateX(-100%);position:absolute}
aside h2{font-size:18px;margin-bottom:12px;font-weight:600}
aside p{font-size:14px;line-height:1.6;color:var(--muted);margin-bottom:15px}
main{flex-grow:1;display:flex;flex-direction:column;padding:15px;position:relative;width:100%}
.top-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.nav-controls{display:flex;gap:15px;align-items:center}
h1{font-size:22px;font-weight:600;line-height:1}
.icon-btn{background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;display:flex;align-items:center}
.chat-frame-container{position:relative;flex-grow:1;width:100%;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:15px;min-height:320px}
#buffer{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--card-bg);z-index:5}
#buffer .spinner{animation:spin 1s linear infinite;margin-bottom:10px}
#buffer i{font-size:36px;color:#2563eb;margin-bottom:10px;display:inline-block}
#buffer span{font-size:14px;color:var(--muted)}
@keyframes spin{to{transform:rotate(360deg)}}
iframe{width:100%;height:100%;border:none;display:none}
.action-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;min-height:56px}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px;border-radius:6px;text-decoration:none;font-size:14px;font-weight:500;color:#fff;min-height:48px}
.btn i{display:inline-block;width:20px;text-align:center;flex:0 0 20px}
.btn span{display:inline-block}
.btn-blue{background-color:#2563eb;color:#fff}
.btn-green{background-color:#16a34a;color:#fff}
.btn-orange{background-color:#ea580c;color:#000}
footer{text-align:center;font-size:11px;color:var(--muted);margin-top:10px}
@media (max-width:850px){aside{position:absolute;height:100%;box-shadow:10px 0 15px rgba(0,0,0,.1)}}