:root{--bg:#f4f3ef;--paper:#eceae4;--white:#fafaf7;--ink:#000;--ink-2:#1a1917;--ink-3:#4a4845;--rule:#d0cec6;--rule-s:#b5b2a8;--g:#1b5740;--g2:#2a7055;--g-light:#c4ddcf;--g-pale:#eaf1ee;--au:#8c6018;--au-pale:#f4efe8;--rd:#8c2a1e;--rd-pale:#f4eae9;--ff-serif:"Libre Baskerville", Georgia, serif;--ff-sans:"DM Sans", "PingFang SC", "Helvetica Neue", sans-serif;--ff-cn:"PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--ff-mono:"DM Mono", "Courier New", monospace}*{box-sizing:border-box;margin:0;padding:0}html{zoom:1.2}html,body{height:100%;overflow:hidden}body{background:var(--bg);color:var(--ink);font-family:var(--ff-sans);-webkit-font-smoothing:antialiased;font-size:13px;line-height:1.7}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,textarea,select{color:inherit;font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--paper)}::-webkit-scrollbar-thumb{background:var(--rule-s);border-radius:0}::-webkit-scrollbar-thumb:hover{background:var(--ink-3)}.app{grid-template-rows:58px minmax(0,1fr);height:100%;display:grid}.main{grid-template-columns:240px 1fr 560px;height:100%;display:grid;overflow:hidden}.col{background:var(--paper);flex-direction:column;display:flex;overflow:hidden}.col-left{border-right:1px solid var(--rule)}.col-right{border-left:1px solid var(--rule)}.col-section{border-bottom:1px solid var(--rule);flex-shrink:0;padding:14px 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12px}.btn-newsession{background:var(--g);width:100%;color:var(--white);letter-spacing:.06em;border-radius:3px;justify-content:center;align-items:center;gap:8px;padding:9px 14px;font-size:12.5px;font-weight:500;transition:background .15s;display:flex}.btn-newsession:hover{background:var(--g2)}.btn-newsession svg{width:11px;height:11px}.history-list{flex:1;margin:0 -16px -14px;padding-bottom:14px;overflow-y:auto}.history-item{border-bottom:1px solid var(--rule);cursor:pointer;padding:10px 14px 10px 16px;transition:background .15s;display:block;position:relative}.history-item:hover{background:var(--white)}.history-item.active{background:var(--white);border-left:2px solid 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16px;font-size:13px;font-weight:600}.dialog-body{flex-direction:column;gap:12px;padding:16px;display:flex}.dialog-field{flex-direction:column;gap:5px;display:flex}.dialog-field label{letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);font-size:10px}.dialog-foot{border-top:1px solid var(--rule);justify-content:flex-end;gap:8px;padding:12px 16px;display:flex}