:root{--color-primary: #143c34;--color-accent: #ff6b35;--color-bg: #f3f6f4;--color-surface: #ffffff;--color-text: #222724;--color-muted: #6b7a72;--radius: 10px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Atkinson Hyperlegible,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-text)}#root{height:100vh;display:flex;flex-direction:column}button{cursor:pointer;border:none;border-radius:var(--radius);font-size:.95rem}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{font:inherit;border:1px solid #d4ddd7;border-radius:var(--radius);padding:.65rem .8rem;background:var(--color-surface);color:var(--color-text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--color-primary);outline-offset:1px}.auth-screen{flex:1;display:flex;align-items:center;justify-content:center;padding:1rem}.auth-card{background:var(--color-surface);border-radius:16px;padding:2.2rem;width:100%;max-width:380px;box-shadow:0 8px 30px #00000014;display:flex;flex-direction:column;gap:.9rem}.auth-card h1{margin:0 0 .3rem;font-size:1.4rem;color:var(--color-primary)}.auth-card p.hint{margin:0;color:var(--color-muted);font-size:.88rem}.auth-card label{display:flex;flex-direction:column;gap:.3rem;font-size:.88rem}.btn-primary{background:var(--color-primary);color:#fff;padding:.7rem 1rem;font-weight:600}.error-banner{background:#fdecea;color:#b3261e;border-radius:var(--radius);padding:.6rem .8rem;font-size:.88rem}.brand-logo{max-height:44px;align-self:flex-start}.powered-by{text-align:center;font-size:.75rem;color:var(--color-muted);padding:.6rem}.chat-layout{flex:1;display:flex;min-height:0}.sidebar{width:270px;background:var(--color-primary);color:#fff;display:flex;flex-direction:column;padding:.9rem;gap:.7rem}.sidebar .app-name{font-weight:700;font-size:1.05rem;padding:.2rem .3rem}.btn-new-chat{background:var(--color-accent);color:#fff;padding:.65rem;font-weight:600}.conversation-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.conversation-item{background:transparent;color:#e6efe9;text-align:left;padding:.55rem .6rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-radius:8px;font-size:.86rem}.conversation-item:hover{background:#ffffff14}.conversation-item.active{background:#ffffff29}.sidebar-footer{display:flex;flex-direction:column;gap:.3rem;font-size:.8rem}.sidebar-footer .user-name{opacity:.85;padding:0 .3rem}.btn-logout{background:transparent;color:#cfe0d7;text-align:left;padding:.4rem .3rem}.btn-logout:hover{color:#fff}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 1.2rem;background:var(--color-surface);border-bottom:1px solid #e3eae5}.chat-header .title{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-list{flex:1;overflow-y:auto;padding:1.2rem;display:flex;flex-direction:column;gap:.9rem}.msg{max-width:760px;padding:.8rem 1rem;border-radius:14px;line-height:1.55;white-space:pre-wrap;word-break:break-word}.msg.user{align-self:flex-end;background:var(--color-primary);color:#fff;border-bottom-right-radius:4px}.msg.assistant{align-self:flex-start;background:var(--color-surface);border-bottom-left-radius:4px;box-shadow:0 1px 4px #0000000f}.msg.streaming:after{content:"▍";color:var(--color-accent);animation:blink 1s infinite}@keyframes blink{50%{opacity:0}}.usage-note{align-self:flex-start;color:var(--color-muted);font-size:.75rem;padding-left:.4rem}.composer{display:flex;gap:.6rem;padding:.9rem 1.2rem;background:var(--color-surface);border-top:1px solid #e3eae5}.composer textarea{flex:1;resize:none;max-height:160px}.btn-send{background:var(--color-accent);color:#fff;padding:0 1.3rem;font-weight:700}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--color-muted);gap:.4rem}.empty-state h2{color:var(--color-primary);margin:0}.loading-screen{flex:1;display:flex;align-items:center;justify-content:center;color:var(--color-muted)}.quota-box{display:flex;flex-direction:column;gap:4px;font-size:.74rem;color:#cfe0d7;padding:0 .3rem .4rem}.quota-bar{height:6px;border-radius:3px;background:#ffffff26;overflow:hidden}.quota-fill{height:100%;background:var(--color-accent);border-radius:3px;transition:width .3s}.notice-banner{margin:0 1.2rem .4rem;background:#fff7e6;color:#8a5a00;border-radius:var(--radius);padding:.6rem .8rem;font-size:.88rem}