:root{--bg: #101016;--bg-soft: #17171f;--bg-raise: #1e1e28;--border: #2a2a36;--text: #f4f4f6;--muted: #a7a7b3;--accent-a: #6d6df2;--accent-b: #22d3ee;--accent-grad: linear-gradient(135deg, var(--accent-a), var(--accent-b));--user-bubble: #2b2b6e;--radius: 14px;--topbar-h: 56px;--sidebar-w: 280px}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,system-ui,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}#app{height:100dvh;display:flex;flex-direction:column}.banner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;background:var(--bg-raise);border-bottom:1px solid var(--border);font-size:13px;color:var(--muted)}.banner strong{color:var(--text);display:block;font-size:14px}.banner.warn{background:#3a2b12;color:#f5cf87;justify-content:center;text-align:center}.banner button{background:none;border:0;color:var(--muted);font-size:16px;cursor:pointer}#topbar{height:var(--topbar-h);flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:0 12px;border-bottom:1px solid var(--border);background:var(--bg);padding-top:env(safe-area-inset-top)}#menu-btn{background:none;border:0;color:var(--text);font-size:20px;padding:8px;cursor:pointer}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:17px;flex:1}.brand-dot{width:22px;height:22px;border-radius:7px;background:var(--accent-grad);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#fff}.brand-dot:after{content:"L"}.usage-pill{font-size:12px;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:4px 10px;white-space:nowrap}#layout{flex:1;display:flex;min-height:0;position:relative}#sidebar{position:absolute;z-index:30;top:0;bottom:0;left:0;width:min(var(--sidebar-w),84vw);background:var(--bg-soft);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px;gap:10px;transform:translate(-105%);transition:transform .22s ease}#sidebar.open{transform:none}#backdrop{position:absolute;inset:0;background:#00000080;z-index:20}#convo-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:4px}.convo-empty{color:var(--muted);font-size:13px;padding:12px 8px;text-align:center}.convo-item{display:flex;align-items:center;border-radius:10px}.convo-item.active{background:var(--bg-raise)}.convo-title{flex:1;background:none;border:0;color:var(--text);text-align:left;font-size:14px;padding:10px 8px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.convo-del{background:none;border:0;color:var(--muted);font-size:12px;padding:10px;cursor:pointer;opacity:.6}.convo-del:hover{opacity:1;color:#ff8a8a}#sidebar-foot{border-top:1px solid var(--border);padding-top:10px;display:flex;flex-direction:column;gap:8px}.tier-row{display:flex;align-items:center;justify-content:space-between}.tier-badge{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:4px 10px;border-radius:999px;background:var(--bg-raise);border:1px solid var(--border);color:var(--muted)}.tier-badge.starter{color:#9adcff;border-color:#2c5a76}.tier-badge.pro{color:#b7a6ff;border-color:#4a3f7a}.tier-badge.accelerator{color:#ffd28a;border-color:#7a5a2c}.tier-badge.studio{color:#fff;border-color:transparent;background:var(--accent-grad)}#user-row{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:36px}.user-email{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.btn-primary{background:var(--accent-grad);color:#fff;border:0;border-radius:12px;padding:11px 16px;font-size:15px;font-weight:600;cursor:pointer}.btn-primary:disabled{opacity:.5;cursor:default}.btn-primary.wide{width:100%}.link-btn{background:none;border:0;color:var(--accent-b);font-size:13px;cursor:pointer;padding:4px;white-space:nowrap}#main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg)}#messages{flex:1;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:14px}#empty-state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px;text-align:center;pointer-events:none}#empty-state[hidden]{display:none}.empty-logo{width:64px;height:64px;border-radius:20px;background:var(--accent-grad);display:grid;place-items:center;font-size:34px;font-weight:800;color:#fff}#empty-state h2{margin:0;font-size:22px}#suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;pointer-events:auto;max-width:560px}.suggestion{background:var(--bg-raise);border:1px solid var(--border);color:var(--text);border-radius:999px;padding:9px 14px;font-size:13px;cursor:pointer}.suggestion:hover{border-color:var(--accent-a)}.msg{display:flex;gap:10px;max-width:100%}.msg.user{flex-direction:row-reverse}.avatar{flex:0 0 auto;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;background:var(--bg-raise);border:1px solid var(--border);color:var(--muted)}.msg.assistant .avatar{background:var(--accent-grad);color:#fff;border:0;font-size:15px}.msg-body{max-width:min(88%,720px);padding:10px 14px;border-radius:var(--radius);background:var(--bg-raise);border:1px solid var(--border);font-size:15px;line-height:1.55;overflow-wrap:break-word;min-width:0}.msg.user .msg-body{background:var(--user-bubble);border-color:transparent}.msg-body p{margin:0 0 8px}.msg-body p:last-child{margin-bottom:0}.msg-body h2,.msg-body h3,.msg-body h4{margin:12px 0 6px}.msg-body ul{margin:8px 0;padding-left:20px}.msg-body li{margin:4px 0}.msg-body blockquote{margin:8px 0;padding:6px 12px;border-left:3px solid var(--accent-a);color:var(--muted)}.msg-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:#00000059;padding:2px 6px;border-radius:6px}.msg-body pre{margin:10px -6px;padding:10px;background:#00000073;border-radius:10px;overflow-x:auto}.msg-body pre code{background:none;padding:0}.msg-body a{color:var(--accent-b)}.msg-error{color:#ff9d9d}.typing{color:var(--muted);letter-spacing:2px;animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.4}}#composer{flex:0 0 auto;display:flex;gap:8px;align-items:flex-end;padding:10px 12px calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:var(--bg)}#input{flex:1;resize:none;background:var(--bg-raise);border:1px solid var(--border);border-radius:18px;color:var(--text);font-size:16px;line-height:1.4;padding:11px 14px;max-height:140px;font-family:inherit}#input:focus{outline:none;border-color:var(--accent-a)}#send-btn{width:44px;height:44px;flex:0 0 auto;border-radius:50%;border:0;background:var(--accent-grad);color:#fff;font-size:20px;cursor:pointer}#send-btn:disabled{opacity:.5}#disclaimer{text-align:center;font-size:11px;color:var(--muted);padding:4px 12px calc(8px + env(safe-area-inset-bottom));opacity:.7}.modal{position:fixed;inset:0;z-index:50;background:#0009;display:grid;place-items:center;padding:16px}.modal[hidden]{display:none}.modal-card{position:relative;width:min(400px,100%);background:var(--bg-soft);border:1px solid var(--border);border-radius:18px;padding:24px 20px 20px;max-height:88dvh;overflow-y:auto}.modal-card.wide-card{width:min(860px,100%)}.modal-card h2{margin:0 0 4px;font-size:20px}.modal-x{position:absolute;top:10px;right:12px;background:none;border:0;color:var(--muted);font-size:16px;cursor:pointer;padding:6px}.tabs{display:flex;gap:4px;margin-bottom:18px;background:var(--bg-raise);border-radius:12px;padding:4px}.tab{flex:1;background:none;border:0;color:var(--muted);font-size:14px;font-weight:600;padding:10px;border-radius:9px;cursor:pointer}.tab.active{background:var(--bg-soft);color:var(--text)}#auth-form label{display:block;font-size:13px;color:var(--muted);margin-bottom:12px}#auth-form input{display:block;width:100%;margin-top:6px;background:var(--bg-raise);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:16px;padding:11px 12px}#auth-form input:focus{outline:none;border-color:var(--accent-a)}.form-error{color:#ff9d9d;font-size:13px;margin-bottom:12px}.muted{color:var(--muted);font-size:13px}#tier-cards{display:grid;gap:10px;margin-top:14px}.tier-card{border:1px solid var(--border);border-radius:14px;padding:14px;background:var(--bg-raise)}.tier-card.current{border-color:var(--accent-a)}.tier-name{font-weight:700;font-size:15px}.current-tag{font-size:11px;font-weight:600;color:var(--accent-b);text-transform:uppercase;letter-spacing:.05em}.tier-price{font-size:26px;font-weight:800;margin:4px 0}.tier-price span{font-size:13px;font-weight:400;color:var(--muted)}.tier-quota{font-size:13px;color:var(--accent-b);margin-bottom:6px}.tier-card .muted{margin:6px 0 10px}#toast{position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translate(-50%);z-index:60;background:var(--bg-raise);border:1px solid var(--border);color:var(--text);font-size:14px;padding:11px 18px;border-radius:999px;max-width:min(92vw,480px);text-align:center;box-shadow:0 8px 30px #00000080}#toast[hidden]{display:none}@media(min-width:900px){#menu-btn,#backdrop{display:none}#sidebar{position:static;transform:none;width:var(--sidebar-w);flex:0 0 auto}#messages{padding:24px}.msg-body{max-width:min(80%,760px)}#composer{max-width:860px;margin:0 auto;width:100%}#tier-cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}@media(hover:none){.convo-del{opacity:.8}}