*{box-sizing:border-box;margin:0;padding:0}
body{background:#0a0a0a;color:#e5e5e5;font-family:Inter,system-ui,sans-serif}
.landing{max-width:800px;margin:80px auto;padding:20px;text-align:center}
.btn{display:inline-block;padding:12px 24px;background:#5865F2;color:#fff;border-radius:8px;text-decoration:none;margin:20px 0}
.plans-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:30px;text-align:left}
.plan-card{background:#151515;border:1px solid #222;border-radius:12px;padding:16px}
.plan-card .price{font-size:22px;font-weight:700;margin:6px 0}
.plan-card .meta{font-size:12px;color:#888}
#app{display:flex;height:100vh}
#sidebar{width:260px;background:#111;border-right:1px solid #222;display:flex;flex-direction:column;transition:.2s}
#sidebar.hidden{margin-left:-260px}
.sidebar-head{padding:16px;display:flex;justify-content:space-between;font-weight:700}
#newChat{margin:12px;padding:10px;background:#1e1e1e;border:1px solid #2a2a2a;border-radius:8px;color:#fff;cursor:pointer}
#history{flex:1;overflow:auto;padding:8px}
.hist-item{padding:8px 10px;border-radius:6px;cursor:pointer;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#aaa}
.hist-item:hover{background:#1a1a1a;color:#fff}
.sidebar-foot{padding:12px;border-top:1px solid #222;font-size:12px}
.sidebar-foot a{color:#888;margin-right:8px}
#main{flex:1;display:flex;flex-direction:column;position:relative}
#topbar{height:50px;display:flex;justify-content:space-between;align-items:center;padding:0 16px;border-bottom:1px solid #222}
.avatar-wrap{position:relative;display:inline-block;cursor:pointer}
.avatar{width:36px;height:36px;border-radius:50%;border:2px solid #222;background:#1a1a1a;object-fit:cover}
.status-dot{position:absolute;bottom:-1px;right:-1px;width:12px;height:12px;border-radius:50%;border:2px solid #0a0a0a;background:#ef4444}
.status-dot.online{background:#22c55e;box-shadow:0 0 6px #22c55e}
.status-dot.offline{background:#ef4444;box-shadow:0 0 8px #ef4444}
.status-dot.checking{background:#eab308;box-shadow:0 0 6px #eab308}
.avatar-menu{position:relative}
.dropdown{position:absolute;right:0;top:44px;background:#1a1a1a;border:1px solid #2a2a2a;border-radius:10px;min-width:220px;padding:8px;z-index:10}
.dropdown.hidden{display:none}
.dropdown a{display:block;padding:8px 10px;color:#ccc;text-decoration:none;border-radius:6px;font-size:13px}
.dropdown a:hover{background:#222;color:#fff}
.drop-user{padding:8px 10px;font-size:12px;color:#aaa;border-bottom:1px solid #222;margin-bottom:6px}
#chat{flex:1;overflow:auto;padding:20px;max-width:800px;margin:0 auto;width:100%}
.msg{margin:16px 0;line-height:1.6}
.msg.user{background:#1a1a1a;padding:12px 14px;border-radius:12px}
.msg.assistant{padding:12px 2px}
.msg pre{background:#151515;border:1px solid #222;border-radius:8px;padding:12px;overflow:auto;position:relative;margin:8px 0}
.msg pre .copy-btn{position:absolute;top:6px;right:6px;padding:4px 8px;background:#222;border:1px solid #333;border-radius:6px;color:#aaa;font-size:11px;cursor:pointer}
#disclaimer{text-align:center;font-size:11px;color:#555;padding:6px}
#composer{display:flex;align-items:flex-end;gap:8px;padding:12px;max-width:800px;margin:0 auto;width:100%;background:#111;border:1px solid #222;border-radius:16px;margin-bottom:16px}
.model-select select{background:#1a1a1a;color:#fff;border:1px solid #333;border-radius:8px;padding:6px}
#prompt{flex:1;background:transparent;border:none;color:#fff;outline:none;resize:none;max-height:120px}
#send{width:32px;height:32px;border-radius:50%;background:#fff;color:#000;border:none;cursor:pointer;font-weight:700}