.chat-layout,.chat-theme{--paper:#fffbf5;--cream:#faf0e6;--cream-warm:#f2e6d5;--charcoal:#36454f;--stone-grey:#8b9399;--stone-light:#c5c9cc;--matcha:#6b7b3a;--border:rgba(54,69,79,0.12);--border-strong:rgba(54,69,79,0.22);--kintsugi:#d4af37;--kintsugi-deep:#a0522d;--clay-brown:#a0522d;--surface-alt:#f5ede3;--font-display:"Noto Serif SC",Georgia,serif;--font-mono:"JetBrains Mono",monospace;--topbar-h:60px}.chat-layout{display:grid;grid-template-columns:268px 1fr;height:100%;min-height:0;background:var(--cream)}.chat-pane{min-width:0;overflow:hidden;background:var(--cream)}.chat-pane,.hist-rail{display:flex;flex-direction:column}.hist-rail{background:var(--surface-alt);border-right:1px solid var(--border);padding:14px 10px 0;min-height:0;position:relative}.hist-rail:before{content:"";position:absolute;top:80px;bottom:60px;right:-1px;width:1.5px;background:linear-gradient(180deg,transparent 0,transparent 10%,var(--kintsugi) 12%,var(--kintsugi) 14%,transparent 18%,transparent 70%,var(--kintsugi-deep) 72%,var(--kintsugi-deep) 73%,transparent 76%);opacity:.55}.hist-new{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--paper);border:1px solid var(--border-strong);color:var(--charcoal);font-family:var(--font-display);font-size:14.5px;font-weight:600;letter-spacing:.3px;cursor:pointer;position:relative;transition:background .16s ease}.hist-new:after{content:"";position:absolute;top:-1px;left:-1px;width:6px;height:6px;background:var(--kintsugi)}.hist-new:hover{background:var(--cream-warm)}.hist-new__icon{width:22px;height:22px;display:grid;place-items:center;background:var(--charcoal);color:var(--cream);flex-shrink:0}.hist-new__label{flex:1;text-align:left}.hist-new__kbd{font-family:var(--font-mono);font-size:10.5px;padding:2px 6px;background:var(--cream)}.hist-new__kbd,.hist-search{color:var(--stone-grey);border:1px solid var(--border)}.hist-search{display:flex;align-items:center;gap:8px;margin-top:8px;padding:8px 10px;background:var(--paper)}.hist-search input{flex:1;background:transparent;border:none;outline:none;font-size:13px;color:var(--charcoal)}.hist-search__clear{display:grid;place-items:center;width:20px;height:20px;border:none;background:transparent;color:var(--stone-grey);cursor:pointer}.hist-list{flex:1;overflow-y:auto;margin-top:12px;min-height:0}.hist-group{margin-bottom:8px}.hist-group__label{display:flex;align-items:center;gap:8px;padding:6px 8px 4px;font-family:var(--font-display);font-size:11px;font-weight:600;color:var(--stone-grey);letter-spacing:2px;text-transform:uppercase}.hist-group__rule{flex:1;height:1px;background:var(--border)}.hist-group__count{font-family:var(--font-mono);font-size:10px;color:var(--stone-grey);letter-spacing:.4px;opacity:.7}.hist-item{display:flex;align-items:center;gap:6px;padding:8px 10px 8px 14px;cursor:pointer;position:relative;border:1px solid transparent;margin:1px 0}.hist-item:hover{background:var(--cream-warm)}.hist-item.is-active{background:var(--paper);border-color:var(--border);font-weight:600}.hist-item.is-active:before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--clay-brown)}.hist-item__title{flex:1;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.hist-item__more{width:22px;height:22px;display:grid;place-items:center;background:transparent;border:none;color:var(--stone-grey);opacity:0;cursor:pointer}.hist-item:hover .hist-item__more,.hist-item__more.is-visible{opacity:1}.hist-menu{position:absolute;top:calc(100% - 2px);right:4px;z-index:30;min-width:152px;background:var(--paper);border:1px solid var(--border-strong);box-shadow:0 12px 32px rgba(54,69,79,.16);padding:4px 0}.hist-menu button{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;background:transparent;border:none;font-size:12.5px;text-align:left;cursor:pointer;color:var(--charcoal)}.hist-menu button:hover{background:var(--cream-warm)}.hist-menu button.danger{color:#b14a2a}.hist-menu__divider{height:1px;background:var(--border);margin:4px 8px}.hist-empty{display:flex;flex-direction:column;align-items:center;gap:8px;padding:36px 16px;font-size:12.5px;font-family:var(--font-display)}.hist-empty,.hist-foot{color:var(--stone-grey)}.hist-foot{padding:10px 8px 12px;border-top:1px solid var(--border);margin-top:8px;text-align:center;font-size:12px}.page-banner{padding:10px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,var(--paper) 0,var(--cream) 100%);flex-shrink:0}.page-banner h1{font-family:var(--font-display);font-size:22px;font-weight:700;margin:0;letter-spacing:.2px;position:relative;display:inline-block;line-height:1.25;color:var(--charcoal)}.page-banner h1:after{content:"";position:absolute;left:0;bottom:-3px;width:28px;height:2px;background:var(--kintsugi)}.page-banner .crumbs{font-family:var(--font-display);font-size:12px;color:var(--stone-grey);letter-spacing:.4px;margin-bottom:2px}.page-banner .crumbs em{color:var(--clay-brown);font-style:italic}.page-banner__title-accent{color:var(--charcoal)}.chat-welcome{display:flex;flex-direction:column;align-items:center;padding:48px 32px 64px;gap:28px;flex:1;overflow-y:auto}.chat-welcome__head{display:flex;align-items:center;gap:18px}.chat-welcome__title{font-family:var(--font-display);font-size:34px;font-weight:700;margin:0;letter-spacing:.5px;color:var(--charcoal)}.chat-welcome__title .text-brand{color:var(--clay-brown)}.chat-mode-toggle{display:flex;gap:8px;padding:4px;background:var(--paper);border:1px solid var(--border)}.chat-mode{padding:10px 22px;background:transparent;border:none;font-family:var(--font-display);font-size:16px;color:var(--stone-grey);display:inline-flex;align-items:center;gap:6px;cursor:pointer}.chat-mode.active{background:var(--cream-warm);color:var(--clay-brown);font-weight:600}.chat-mode-toggle.chat-mode--placeholder .chat-mode{pointer-events:none;opacity:.72;cursor:default}.chat-welcome__prompts{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;max-width:760px}.chat-composer .chip,.chat-welcome__prompts .chip{padding:8px 14px;font-family:var(--font-display);font-size:14px;border:1px solid var(--border);background:var(--paper);color:var(--charcoal);display:inline-flex;align-items:center;gap:6px;cursor:pointer}.chat-composer .chip.active{background:rgba(54,69,79,.08);border-color:var(--charcoal)}.chat-composer .chip.gold.active{background:rgba(212,175,55,.18);border-color:rgba(212,175,55,.4);color:var(--clay-brown)}.chat-welcome__disclaimer{margin-top:8px;font-size:13px;opacity:.7;color:var(--stone-grey)}.chat-composer{max-width:760px;width:100%;margin:0 auto;padding:16px 18px 12px;position:relative;background:var(--paper);border:1px solid var(--border);border-radius:2px 18px 12px 4px}.chat-composer__seam{position:absolute;top:-1px;left:12%;right:42%;height:1.5px;background:var(--kintsugi);opacity:.7}.chat-composer .textarea{width:100%;border:none;background:transparent;min-height:64px;padding:0;resize:none;box-shadow:none;font-size:15px;outline:none;color:var(--charcoal);font-family:inherit;line-height:1.6}.chat-composer--dense{padding:12px 14px 10px}.chat-composer--dense .textarea{min-height:44px}.chat-composer--with-dropdown{overflow:visible;z-index:2}.chat-composer__toolbar{justify-content:space-between;margin-top:10px}.chat-composer__actions,.chat-composer__chips,.chat-composer__toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.chat-composer .icon-btn{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--border);background:transparent;color:var(--stone-grey);cursor:not-allowed;opacity:.5}.chat-composer .btn-primary{width:34px;height:34px;display:grid;place-items:center;border:none;background:var(--charcoal);color:var(--cream);cursor:pointer}.chat-composer .btn-primary:disabled{opacity:.45;cursor:not-allowed}.chat-thread{flex:1;display:flex;flex-direction:column;min-height:0}.chat-thread__scroll{flex:1;overflow-y:auto;padding:28px 32px 16px;max-width:920px;width:100%;margin:0 auto}.chat-msg{display:flex;gap:12px;margin-bottom:18px}.chat-msg--user{justify-content:flex-end}.chat-msg__avatar{width:30px;height:30px;background:var(--charcoal);color:var(--cream);display:grid;place-items:center;flex-shrink:0}.chat-msg__bubble{max-width:min(70%,640px);padding:12px 16px;white-space:pre-wrap;font-size:14px;line-height:1.65}.chat-msg--user .chat-msg__bubble{background:var(--charcoal);color:var(--cream);border:1px solid var(--charcoal)}.chat-msg--bot .chat-msg__bubble{background:var(--paper);color:var(--charcoal);border:1px solid var(--border)}.chat-msg__tools{display:flex;gap:4px;margin-top:10px;padding-top:8px;border-top:1px dashed var(--border)}.chat-msg__tools button{width:26px;height:26px;display:grid;place-items:center;background:transparent;border:none;color:var(--stone-grey);cursor:pointer}.chat-thread__composer{padding:12px 24px 24px;border-top:1px solid var(--border);flex-shrink:0}.chat-error-banner{margin:0 24px 8px;padding:10px 12px;border-left:3px solid #a0522d;background:#f2e6d5;color:#5c3d2e;font-size:13px}.chat-loading-rail .skeleton-line{height:32px;margin-bottom:8px;background:rgba(54,69,79,.08)}@media (max-width:768px){.chat-layout{grid-template-columns:1fr}.hist-rail{display:none}}@keyframes chatDropdownIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.model-dropdown{position:relative;width:340px;background:var(--paper,#fffbf5);border:1px solid var(--border-strong,rgba(54,69,79,.22));box-shadow:0 12px 40px rgba(54,69,79,.18),0 0 0 1px rgba(212,175,55,.08);display:flex;flex-direction:column;max-height:480px;color:var(--charcoal,#36454f);font-family:var(--font-display,"Noto Serif SC",Georgia,serif)}.model-dropdown--floating{animation:chatDropdownIn .18s ease-out both}.model-dropdown--floating.model-dropdown--above{transform-origin:bottom left}.model-dropdown--floating.model-dropdown--below{transform-origin:top left}.model-dropdown:before{content:"";position:absolute;top:-1px;left:-1px;width:28px;height:1.5px;background:var(--kintsugi)}.model-dropdown--auto-only{max-height:none}.model-dropdown--auto-only .model-dropdown__auto{border-bottom:none}.model-dropdown__auto{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);font-family:var(--font-display);font-size:15px;font-weight:600;color:var(--charcoal);letter-spacing:.3px;flex-shrink:0}.model-dropdown__toggle{width:40px;height:22px;border:1.5px solid var(--border-strong);background:var(--stone-light);padding:0;position:relative;cursor:pointer;transition:background .2s ease,border-color .2s ease}.model-dropdown__toggle.is-on{background:var(--clay-brown);border-color:var(--clay-brown)}.model-dropdown__toggle-thumb{position:absolute;top:2px;left:2px;width:16px;height:16px;background:var(--paper);border:1px solid rgba(54,69,79,.15);transition:transform .2s ease}.model-dropdown__toggle.is-on .model-dropdown__toggle-thumb{transform:translateX(18px)}.model-dropdown__scroll{flex:1;overflow-y:auto;padding:6px 0;min-height:0}.model-dropdown__section{padding:8px 16px 4px;font-size:12px;font-weight:500;color:var(--stone-grey);letter-spacing:.5px}.model-dropdown__item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 16px;background:transparent;border:none;color:var(--charcoal);font-size:14px;text-align:left;cursor:pointer;transition:background .14s ease;position:relative}.model-dropdown__item:hover{background:var(--cream-warm)}.model-dropdown__item.is-selected{background:rgba(160,82,45,.06)}.model-dropdown__name{font-weight:500;letter-spacing:.2px;white-space:nowrap}.model-dropdown__default{font-size:10.5px;font-weight:500;color:var(--matcha);background:rgba(107,123,58,.1);border:1px solid rgba(107,123,58,.25);padding:1px 7px;letter-spacing:.3px;flex-shrink:0}.model-dropdown__check{color:var(--matcha);display:grid;place-items:center;flex-shrink:0;margin-left:auto}.model-selector-compact{position:relative}.model-selector-compact__trigger{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;background:transparent;border:1px solid var(--border);color:var(--charcoal);font-size:13px;font-weight:500;cursor:pointer;transition:background .16s ease,border-color .16s ease;white-space:nowrap}.model-selector-compact__trigger:hover:not(:disabled){background:var(--cream-warm);border-color:var(--border-strong)}.model-selector-compact__trigger:disabled{opacity:.6;cursor:not-allowed}.model-selector-compact__name{letter-spacing:.2px;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-selector-compact--empty,.model-selector-compact--error,.model-selector-compact--loading{padding:5px 10px;border:1px solid var(--border);font-size:13px;color:var(--stone-grey)}.model-selector-compact--error{color:#a0522d;border-color:rgba(160,82,45,.35)}