:root{--primary: #6366f1;--primary-hover: #4f46e5;--bg-app: #f8fafc;--bg-card: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--bubble-user: #6366f1;--bubble-assistant: #f1f5f9}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-app);color:var(--text-main)}.app-container{display:flex;flex-direction:column;height:100vh}.navbar{background:#fff;border-bottom:1px solid var(--border);padding:1rem 2rem}.nav-content{display:flex;align-items:center;gap:.75rem;max-width:1200px;margin:0 auto}.nav-icon{color:var(--primary)}.nav-content h1{font-size:1.25rem;font-weight:700}.main-layout{display:flex;flex:1;max-width:1200px;margin:0 auto;width:100%;overflow:hidden;gap:2rem;padding:2rem}.sidebar{width:320px;background:#fff;border:1px solid var(--border);border-radius:1rem;padding:1.5rem;display:flex;flex-direction:column;gap:1rem}.section-header{display:flex;align-items:center;gap:.5rem;color:var(--text-muted);margin-bottom:.5rem}.section-header h2{font-size:1rem;font-weight:600}.add-doc-form textarea{width:100%;border:1px solid var(--border);border-radius:.5rem;padding:1rem;font-size:.9rem;resize:none;margin-bottom:1rem;outline:none}.add-doc-form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px #6366f11a}.add-doc-form button{width:100%;background:var(--primary);color:#fff;border:none;padding:.75rem;border-radius:.5rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:.5rem;cursor:pointer;transition:background .2s}.add-doc-form button:hover{background:var(--primary-hover)}.doc-hint{font-size:.8rem;color:var(--text-muted);line-height:1.4;padding-top:1rem;border-top:1px solid var(--border)}.chat-container{flex:1;background:#fff;border:1px solid var(--border);border-radius:1rem;display:flex;flex-direction:column;overflow:hidden}.messages-list{flex:1;overflow-y:auto;padding:1.5rem;display:flex;flex-direction:column;gap:1rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);text-align:center}.empty-state h3{margin:1rem 0 .5rem;color:var(--text-main)}.message-bubble{max-width:80%;display:flex}.message-bubble.user{align-self:flex-end}.message-bubble.assistant{align-self:flex-start}.bubble-content{padding:.75rem 1rem;border-radius:1rem;font-size:.95rem;line-height:1.5}.user .bubble-content{background:var(--bubble-user);color:#fff;border-bottom-right-radius:0}.assistant .bubble-content{background:var(--bubble-assistant);color:var(--text-main);border-bottom-left-radius:0}.message-context{margin-top:.75rem;padding-top:.75rem;border-top:1px solid rgba(0,0,0,.05);font-size:.8rem}.message-context ul{list-style:disc;margin-left:1.25rem;margin-top:.25rem}.question-form{padding:1.5rem;border-top:1px solid var(--border);display:flex;gap:1rem}.question-form input{flex:1;border:1px solid var(--border);border-radius:.5rem;padding:.75rem 1rem;outline:none}.question-form input:focus{border-color:var(--primary)}.question-form button{background:var(--primary);color:#fff;border:none;width:3rem;border-radius:.5rem;display:flex;align-items:center;justify-content:center;cursor:pointer}.animate-spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}