:root{--sidebar-width:280px;--border-radius-base:0.5rem;--brand-primary:#3498db;--sidebar-bg:#2c3e50}body{height:100vh;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background-color:#f4f7f9}.wrapper{display:flex;width:100%;height:100vh;align-items:stretch}#sidebar{min-width:var(--sidebar-width);max-width:var(--sidebar-width);background:var(--sidebar-bg);color:#ecf0f1;transition:margin-left 0.3s ease-in-out;display:flex;flex-direction:column}#content{flex-grow:1;min-height:100vh;display:flex;flex-direction:column;position:relative}#sidebar .sidebar-header{padding:1.25rem;border-bottom:1px solid rgba(255,255,255,0.1)}#sidebar ul.list-unstyled{padding:1rem;overflow-y:auto;flex-grow:1}#sidebar ul li a{padding:10px 15px;font-size:1.1em;display:block;color:#bdc3c7;text-decoration:none;border-radius:var(--border-radius-base);transition:background 0.2s,color 0.2s}#sidebar ul li a:hover,#sidebar ul li.active a{color:#fff;background:#34495e}#sidebar .sidebar-footer{padding:1rem;border-top:1px solid rgba(255,255,255,0.1)}#chat-area{flex-grow:1;overflow-y:auto;padding:2rem}.chat-bubble{padding:0.8rem 1.2rem;margin-bottom:1rem;max-width:75%;border-radius:1.25rem;line-height:1.5;word-wrap:break-word}.chat-bubble.user{background-color:var(--brand-primary);color:white;margin-left:auto;border-bottom-right-radius:0.3rem}.chat-bubble.ai{background-color:#ffffff;color:#333;border:1px solid #e0e0e0;margin-right:auto;border-bottom-left-radius:0.3rem}.chat-bubble.system{background-color:#fffbe6;border-color:#ffe58f;color:#664d03;width:100%;max-width:100%;text-align:center;border-radius:var(--border-radius-base);font-size:0.9em}.chat-bubble .content p:last-child{margin-bottom:0}.chat-bubble .content pre{white-space:pre-wrap}.analysis-card{border-radius:var(--border-radius-base);border:1px solid #dee2e6;background:#fff;box-shadow:0 4px 6px rgba(0,0,0,0.05)}.analysis-card .card-header{background-color:#f8f9fa}.analysis-card-plot{max-width:100%;height:auto;border-radius:var(--border-radius-base)}#input-area{padding:1rem;background:#ffffff;border-top:1px solid #e0e0e0;box-shadow:0 -2px 10px rgba(0,0,0,0.05)}#message-input{border-radius:2rem;padding:0.75rem 1.25rem;border:1px solid #ccc;transition:border-color 0.2s}#message-input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 0.25rem rgba(52,152,219,0.25)}#input-area .btn{border-radius:50%;width:48px;height:48px;flex-shrink:0;display:flex;align-items:center;justify-content:center}#sidebar-toggle{position:absolute;top:15px;left:15px;z-index:1200}@media (max-width:768px){#sidebar{margin-left:calc(-1 * var(--sidebar-width));position:absolute;z-index:1100;height:100%}#sidebar.collapsed{margin-left:0}#sidebar-toggle{display:block}#chat-area{padding:1rem;padding-top:60px}#input-area{padding:0.75rem}}