:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg-color: #0f172a;--card-bg: rgba(30, 41, 59, .7);--primary-color: #3b82f6;--primary-hover: #2563eb;--text-primary: #f8fafc;--text-secondary: #94a3b8;--border-color: rgba(148, 163, 184, .1);--glass-border: 1px solid rgba(255, 255, 255, .1);--user-msg-bg: #3b82f6;--ai-msg-bg: rgba(51, 65, 85, .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--bg-color);color:var(--text-primary);height:100vh;overflow:hidden;display:flex;justify-content:center;align-items:center}.hidden{display:none!important}.overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at center,#1e293b,#0f172a);display:flex;justify-content:center;align-items:center;z-index:1000}.login-card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:2.5rem;border-radius:16px;border:var(--glass-border);box-shadow:0 25px 50px -12px #00000080;text-align:center;width:100%;max-width:400px}.login-card h1{font-size:1.5rem;margin-bottom:.5rem;font-weight:600}.login-card p{color:var(--text-secondary);margin-bottom:2rem;font-size:.9rem}.login-card input{width:100%;padding:.75rem 1rem;border-radius:8px;border:1px solid #334155;background:#0f172a80;color:#fff;margin-bottom:1rem;font-size:1rem;outline:none;transition:border-color .2s}.login-card input:focus{border-color:var(--primary-color)}.login-card button{width:100%;padding:.75rem;border-radius:8px;border:none;background:var(--primary-color);color:#fff;font-weight:500;cursor:pointer;transition:background .2s}.login-card button:hover{background:var(--primary-hover)}.error-msg{color:#ef4444;font-size:.85rem;margin-top:1rem}.app-container{width:100%;height:100vh;max-width:1200px;display:flex;flex-direction:column;position:relative;background:radial-gradient(circle at top right,#1e293b 0%,transparent 40%),radial-gradient(circle at bottom left,#1e293b 0%,transparent 40%)}@media(min-width:1024px){.app-container{width:50vw}}.app-header{padding:1.5rem 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:var(--glass-border);background:#0f172acc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.logo{font-weight:700;font-size:1.25rem;background:linear-gradient(to right,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.session-display{font-size:.9rem;color:var(--text-secondary)}.chat-area{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:1.5rem;scroll-behavior:smooth}.welcome-message{text-align:center;margin-top:4rem;color:var(--text-secondary);opacity:.6}.message{display:flex;flex-direction:column;max-width:70%;animation:fadeIn .3s ease-out}.message.user{align-self:flex-end;align-items:flex-end}.message.ai{align-self:flex-start;align-items:flex-start}.message-bubble{padding:1rem 1.25rem;border-radius:16px;line-height:1.5;font-size:.95rem;position:relative}.message.user .message-bubble{background:var(--user-msg-bg);color:#fff;border-bottom-right-radius:4px}.message.ai .message-bubble{background:var(--ai-msg-bg);color:var(--text-primary);border:var(--glass-border);border-bottom-left-radius:4px}.message-time{font-size:.7rem;color:var(--text-secondary);margin-top:.25rem;padding:0 .5rem}.input-area{padding:1.5rem 2rem;background:#0f172ae6;border-top:var(--glass-border)}.input-wrapper{position:relative;max-width:800px;margin:0 auto;background:var(--card-bg);border-radius:12px;border:var(--glass-border);display:flex;align-items:flex-end;padding:.5rem;transition:border-color .2s}.input-wrapper:focus-within{border-color:var(--primary-color)}textarea{flex:1;background:transparent;border:none;color:#fff;padding:.75rem;font-family:inherit;font-size:1rem;resize:none;max-height:150px;outline:none}.input-wrapper button{background:var(--primary-color);border:none;border-radius:8px;width:40px;height:40px;display:flex;justify-content:center;align-items:center;color:#fff;cursor:pointer;margin-left:.5rem;transition:transform .1s,background .2s}.input-wrapper button:hover{background:var(--primary-hover)}.input-wrapper button:active{transform:scale(.95)}.input-wrapper button:disabled{background:#475569;cursor:not-allowed}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#475569}