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var(--border-light);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden}.history-schema-section{padding:1rem 1.125rem;border-bottom:1px solid var(--border-light);overflow-y:auto;max-height:40%}.history-schema-section h3{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.75rem}.history-chats-section{flex:1;display:flex;flex-direction:column;overflow:hidden}.history-header{display:flex;align-items:center;justify-content:space-between;padding:.875rem 1.125rem;border-bottom:1px solid var(--border-light)}.history-header h3{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin:0}.btn-new-chat-sm{width:28px;height:28px;background:none;border:1.5px solid var(--border);color:var(--text-secondary);border-radius:var(--radius-full);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.btn-new-chat-sm:hover{background:var(--primary);border-color:var(--primary);color:#fff}.history-empty{padding:2rem 1.25rem;text-align:center;color:var(--text-muted);font-size:.8125rem;line-height:1.6}.history-empty p{margin-bottom:.25rem}.history-list{flex:1;overflow-y:auto;padding:.375rem}.history-item{display:flex;align-items:center;gap:.5rem;padding:.625rem .75rem;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);margin-bottom:2px;border:2px solid transparent}.history-item:hover{background:var(--bg-hover)}.history-item.active{background:var(--primary-surface);border-color:var(--primary-border)}.history-item-title{flex:1;font-size:.8125rem;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.3}.history-item.active .history-item-title{color:var(--primary);font-weight:600}.history-item-date{font-size:.6875rem;color:var(--text-muted);white-space:nowrap;flex-shrink:0}.history-item-delete{background:none;border:none;color:transparent;font-size:.9375rem;cursor:pointer;padding:.125rem .25rem;border-radius:4px;line-height:1;flex-shrink:0;transition:all var(--transition)}.history-item:hover .history-item-delete{color:var(--text-muted)}.history-item-delete:hover{color:var(--error)!important;background:var(--error-bg)}.btn-send{display:flex;align-items:center;justify-content:center;padding:.5rem .75rem}