:root{--bg-app: #0f172a;--bg-panel: #1e293b;--bg-hover: #334155;--primary: #3b82f6;--primary-hover: #2563eb;--primary-fg: #ffffff;--text-main: #f8fafc;--text-muted: #94a3b8;--border: #334155;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius-sm: .375rem;--radius: .5rem;--radius-lg: .75rem;--radius-xl: 1rem}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-app);color:var(--text-main);margin:0;overscroll-behavior:none;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}button{font-family:inherit;cursor:pointer}input{font-family:inherit}.chat-layout{display:flex;height:100vh;width:100%;overflow:hidden}.sidebar{width:280px;background:var(--bg-app);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;height:100vh;transition:margin-left .3s cubic-bezier(.4,0,.2,1)}.chat-layout.collapsed .sidebar{margin-left:-280px}.brand-row{display:flex;align-items:center;gap:12px;padding:20px;font-weight:600;font-size:1rem;letter-spacing:-.01em}.badge{font-size:.75rem;color:var(--primary);background:#3b82f61a;padding:2px 8px;border-radius:12px;font-weight:500;margin-top:2px;display:inline-block}.new-chat{background:var(--primary);color:var(--primary-fg);border:0;border-radius:var(--radius);padding:12px;font-size:.95rem;font-weight:500;margin:0 16px 16px;flex-shrink:0;display:flex;align-items:center;justify-content:center;gap:8px;transition:background .2s;box-shadow:var(--shadow)}.new-chat:hover{background:var(--primary-hover)}.convo{flex:1;overflow-y:auto;padding:0 12px}.convo-item{display:flex;flex-direction:column;padding:12px;border-radius:var(--radius);cursor:pointer;gap:4px;margin-bottom:4px;transition:background .2s;border:1px solid transparent}.convo-item:hover{background:var(--bg-panel)}.convo-item.active{background:var(--bg-panel);border-color:var(--border)}.convo-item span:first-child{font-size:.9rem;color:var(--text-main);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-weight:500}.convo-item .muted{font-size:.75rem;color:var(--text-muted)}.profile{padding:16px;border-top:1px solid var(--border);display:flex;align-items:center;gap:12px;flex-shrink:0;position:relative;background:var(--bg-app)}.avatar{width:36px;height:36px;border-radius:var(--radius);background:var(--bg-panel);display:grid;place-items:center;font-size:1rem;font-weight:600;color:var(--text-main);flex-shrink:0;border:1px solid var(--border)}.avatar.circle{border-radius:50%}.profile-meta{flex:1;overflow:hidden}.profile-meta>div:first-child{font-weight:500;font-size:.9rem}.profile-meta .muted{font-size:.75rem}.main{flex:1;display:flex;flex-direction:column;height:100vh;background:var(--bg-panel);position:relative}.topbar{flex-shrink:0;padding:16px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:#1e293bcc;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:absolute;top:0;left:0;right:0;z-index:10}.topbar .title{font-size:1rem;font-weight:600;color:var(--text-main)}.messages{flex:1;overflow-y:auto;padding:80px 24px 24px;display:flex;flex-direction:column;gap:24px;scroll-behavior:smooth}.msg{display:flex;gap:16px;max-width:800px;margin:0 auto;width:100%}.msg.me{flex-direction:row-reverse}.msg .avatar{margin-top:4px;border-top-right-radius:4px}.bubble.assistant{background:var(--bg-app);color:var(--text-main);border:1px solid var(--border);border-top-left-radius:4px;position:relative;padding-right:40px}.bubble .copy{position:absolute;top:8px;right:8px;background:transparent;border:1px solid transparent;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:all .2s}.bubble .copy:hover{background:var(--bg-hover);color:var(--text-main);border-color:var(--border)}.citations{margin-top:16px;padding-top:16px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:8px}.citations-title{font-size:.75rem;color:var(--text-muted);width:100%;margin-bottom:4px;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.cite{font-size:.75rem;background:var(--bg-panel);border:1px solid var(--border);padding:4px 10px;border-radius:12px;color:var(--text-muted);transition:all .2s;cursor:default}.cite:hover{border-color:var(--primary);color:var(--primary);background:#3b82f60d}.composer-container{max-width:800px;margin:0 auto;width:100%;padding:0 24px}.composer{display:flex;gap:12px;position:relative;background:var(--bg-app);border:1px solid var(--border);border-radius:var(--radius-xl);padding:8px;box-shadow:var(--shadow-lg);transition:border-color .2s}.composer:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px #3b82f633}.composer input{flex:1;background:transparent;border:none;padding:12px 16px;font-size:1rem;color:var(--text-main);min-height:48px}.composer input:focus{outline:none}.composer .send{background:var(--primary);color:var(--primary-fg);border:0;width:40px;height:40px;border-radius:var(--radius-lg);display:grid;place-items:center;cursor:pointer;transition:background .2s;align-self:center}.composer .send:hover:not(:disabled){background:var(--primary-hover)}.composer .send:disabled{background:var(--bg-hover);color:var(--text-muted);cursor:not-allowed}.disclaimer{font-size:.75rem;color:var(--text-muted);text-align:center;padding:12px 24px 24px;max-width:600px;margin:0 auto}.auth-wrap{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:32px;padding:24px;background:radial-gradient(circle at top,#1e293b,#0f172a)}.brand{text-align:center}.brand h1{font-size:1.75rem;margin:16px 0 8px;font-weight:700;letter-spacing:-.02em}.brand p{color:var(--text-muted);margin:0}.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:420px;display:flex;flex-direction:column;gap:20px;box-shadow:var(--shadow-lg)}.card h2{margin:0;font-size:1.5rem;font-weight:600}.card label{font-size:.85rem;font-weight:500;color:var(--text-muted);margin-bottom:-12px;display:block}.card input{background:var(--bg-app);border:1px solid var(--border);padding:12px 16px;border-radius:var(--radius);font-size:1rem;color:var(--text-main);transition:all .2s}.card input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 2px #3b82f633}.card button.primary{background:var(--primary);color:var(--primary-fg);border:0;border-radius:var(--radius);padding:14px;font-size:1rem;font-weight:600;cursor:pointer;margin-top:8px;transition:background .2s}.card button.primary:hover{background:var(--primary-hover)}.ghost{background:none;border:0;color:var(--text-muted);cursor:pointer;padding:8px;border-radius:var(--radius);transition:color .2s,background .2s}.ghost:hover{color:var(--text-main);background:var(--bg-hover)}.settings-menu{position:absolute;bottom:calc(100% + 8px);left:0;width:100%;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);padding:6px;box-shadow:var(--shadow-lg);z-index:20}.settings-menu-item{display:block;width:100%;background:none;border:none;color:var(--text-main);padding:10px 12px;text-align:left;border-radius:var(--radius-sm);cursor:pointer;font-size:.9rem;transition:background .2s}.settings-menu-item:hover{background:var(--bg-hover)}a{color:var(--primary);text-decoration:none;font-weight:500}a:hover{text-decoration:underline}.muted{color:var(--text-muted)}.small{font-size:.85rem}.tiny{font-size:.75rem}.center{text-align:center}.hamburger{display:none;position:fixed;top:12px;left:12px;z-index:1001;background:var(--bg-panel);border:1px solid var(--border);color:var(--text-main);width:40px;height:40px;border-radius:var(--radius);align-items:center;justify-content:center;box-shadow:var(--shadow)}.backdrop{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:999}.backdrop.show{display:block}@media (max-width: 900px){.hamburger{display:flex}.sidebar{position:fixed;top:0;left:0;z-index:1000;margin-left:-280px;box-shadow:var(--shadow-lg)}.sidebar.open{margin-left:0}.topbar{padding-left:64px}.messages{padding-top:70px}.msg{max-width:100%}.composer-container{padding:0 16px}}