:root{--bg-app:#ffffff;--bg-sidebar:#f7f7f8;--bg-muted:#f4f4f5;--bg-hover:#ececef;--bg-soft:#fafafa;--text-primary:#202123;--text-secondary:#6e6e80;--text-tertiary:#8e8ea0;--border-subtle:rgba(15,23,42,0.08);--border-strong:rgba(15,23,42,0.12);--shadow-soft:0 1px 2px rgba(15,23,42,0.04),0 12px 40px rgba(15,23,42,0.05);--radius-sm:10px;--radius-md:16px;--radius-lg:24px;--radius-xl:28px}*{box-sizing:border-box}body,html{margin:0;width:100%;height:100%;background:var(--bg-app);color:var(--text-primary);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}body{overflow:hidden}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{border:0;background:transparent;color:inherit;cursor:pointer}input,textarea{border:0;outline:0}.app-shell{width:100vw;background:var(--bg-app)}.app-shell,.chat-sidebar{position:relative;display:flex;height:100vh}.chat-sidebar{z-index:4;flex-direction:column;flex-shrink:0;width:258px;min-width:258px;overflow:visible;background:#f9f9f9;border-right:1px solid var(--border-subtle);transition:width .22s ease,min-width .22s ease,transform .24s ease}.chat-sidebar.is-collapsed{width:52px;min-width:52px}.sidebar-content{position:relative;display:flex;flex-direction:column;width:100%;height:100%;padding:0 8px 14px;overflow:hidden}.rail-button,.topbar-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;color:var(--text-secondary);transition:background-color .16s ease,color .16s ease,transform .16s ease}.rail-button:hover,.topbar-icon:hover{background:rgba(15,23,42,.05);color:var(--text-primary)}.composer-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:999px;color:var(--text-secondary)}.composer-icon:hover{background:rgba(15,23,42,.05);color:var(--text-primary)}.rail-button.is-logo{position:relative;color:var(--text-primary)}.sidebar-logo-button{overflow:hidden}.sidebar-logo-default,.sidebar-logo-hover{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;transition:opacity .14s ease}.sidebar-logo-default{opacity:1}.sidebar-logo-hover{opacity:0}.rail-button-bottom{margin-top:auto}.sidebar-header{display:flex;align-items:center;gap:0;height:52px;padding:0;background:#f9f9f9}.sidebar-header-expandable{display:flex;flex:1 1 auto;justify-content:flex-end;min-width:0;overflow:hidden;opacity:1;transition:flex-basis .22s ease,opacity .12s ease}.topbar-title:hover{background:#f3f3f3}.mobile-menu-button{display:none}.sidebar-collapse-button{width:36px;height:36px}.sidebar-pinned-list{display:flex;flex-direction:column;gap:2px;padding:0 0 2px}.sidebar-expandable{display:flex;flex:1 1 auto;min-height:0;overflow:hidden;padding-bottom:54px;opacity:1;transition:flex-basis .22s ease,opacity .12s ease,max-height .22s ease}.sidebar-stack{display:flex;flex:1 1;flex-direction:column;min-height:0;overflow-y:auto;overflow-x:hidden;padding-top:10px;padding-right:2px}.sidebar-list,.sidebar-secondary-list{display:flex;flex-direction:column;gap:2px}.history-item,.sidebar-link{display:grid;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;width:100%;height:40px;padding:0 8px 0 0;border-radius:12px;font-size:.875rem;color:var(--text-primary);text-align:left}.sidebar-account:hover,.sidebar-link:hover{background:rgba(15,23,42,.04)}.sidebar-link svg{flex:0 0 auto;color:var(--text-secondary)}.sidebar-link-icon{justify-content:center;width:36px;min-width:36px}.sidebar-link-copy,.sidebar-link-icon{display:flex;align-items:center;height:40px}.sidebar-link-copy{min-width:0;overflow:hidden;line-height:1.2;opacity:1;transition:max-width .16s ease,opacity .1s ease}.sidebar-link-label{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.sidebar-link-icon-trailing,.sidebar-link-trailing{flex:0 0 auto;color:var(--text-tertiary);font-size:.72rem;overflow:hidden;white-space:nowrap;opacity:1;transition:max-width .16s ease,opacity .1s ease}.sidebar-section{display:flex;flex-direction:column;padding:14px 0 0}.sidebar-section-history{flex:1 1;min-height:0;padding-top:0}.sidebar-section-label{padding:0 10px 8px;font-size:.72rem;font-weight:600;color:var(--text-tertiary)}.sidebar-history{display:flex;flex:1 1;flex-direction:column;gap:2px;min-height:0;overflow-y:auto;padding-top:8px}.history-item-row{position:relative;display:flex;align-items:center;gap:4px;padding:0 4px;margin:0;border-radius:var(--radius-sm)}.history-item-row.is-active{background:rgba(15,23,42,.06)}.history-item{flex:1 1;min-width:0;display:flex;align-items:center;height:36px;padding:0 8px;text-align:left}.history-item span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:.875rem;font-weight:400}.history-delete{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:28px;height:28px;border-radius:6px;color:var(--text-tertiary);opacity:0;transition:opacity .15s ease,color .15s ease}.history-item-row:hover .history-delete{opacity:1}.history-delete:hover{color:var(--text-primary)}.history-empty{padding:0 10px;font-size:.78rem;line-height:1.6;color:var(--text-secondary)}.sidebar-account{position:absolute;right:8px;bottom:14px;left:8px;display:grid;grid-template-columns:36px minmax(0,1fr);align-items:center;height:40px;margin:0;padding:0 8px 0 0;border-radius:14px;background:#f9f9f9;text-align:left}.sidebar-account:before{content:"";position:absolute;top:-14px;left:0;right:0;height:1px;background:rgba(15,23,42,.12)}.sidebar-account-avatar{display:flex;align-items:center;justify-content:center;justify-self:center;width:24px;height:24px;border-radius:999px;background:#eb6c54;color:#fff;font-size:.74rem;font-weight:700}.sidebar-account-info{display:flex;flex-direction:column;min-width:0;overflow:hidden;opacity:1;transition:max-width .16s ease,opacity .1s ease}.sidebar-account-info strong{font-size:.92rem;font-weight:600;text-align:left}.sidebar-account-info small{color:var(--text-tertiary);text-align:left}.profile-menu{position:fixed;bottom:68px;left:16px;z-index:10;width:280px;padding:8px;border:1px solid rgba(15,23,42,.08);border-radius:16px;background:#ffffff;box-shadow:0 4px 24px rgba(15,23,42,.12)}.profile-menu-header{display:grid;grid-template-columns:36px minmax(0,1fr);align-items:center;padding:8px 10px;margin-bottom:4px}.profile-menu-avatar{display:flex;align-items:center;justify-content:center;justify-self:center;width:32px;height:32px;border-radius:999px;background:#eb6c54;color:#fff;font-size:.82rem;font-weight:700}.profile-menu-info{display:flex;flex-direction:column;min-width:0}.profile-menu-info strong{font-size:.95rem;font-weight:600}.profile-menu-info small{font-size:.8rem;color:var(--text-tertiary)}.profile-menu-divider{height:1px;margin:4px 0;background:rgba(15,23,42,.08)}.profile-menu-item{display:flex;align-items:center;gap:12px;width:100%;min-height:40px;padding:8px 12px;border-radius:10px;text-align:left;color:var(--text-primary);font-size:.9rem}.profile-menu-item:hover{background:#f7f7f8}.profile-menu-item svg{flex-shrink:0;color:var(--text-secondary)}.profile-menu-item span{flex:1 1;min-width:0}.chat-sidebar.is-collapsed .sidebar-header-expandable{flex:0 0;opacity:0;pointer-events:none}.chat-sidebar.is-collapsed .sidebar-logo-button:focus-visible .sidebar-logo-default,.chat-sidebar.is-collapsed .sidebar-logo-button:hover .sidebar-logo-default{opacity:0}.chat-sidebar.is-collapsed .sidebar-logo-button:focus-visible .sidebar-logo-hover,.chat-sidebar.is-collapsed .sidebar-logo-button:hover .sidebar-logo-hover{opacity:1}.chat-sidebar.is-collapsed .sidebar-expandable{flex:0 0;max-height:0;opacity:0;pointer-events:none}.chat-sidebar.is-collapsed .sidebar-link{padding-right:0}.chat-sidebar.is-collapsed .sidebar-account-info,.chat-sidebar.is-collapsed .sidebar-link-copy,.chat-sidebar.is-collapsed .sidebar-link-icon-trailing,.chat-sidebar.is-collapsed .sidebar-link-trailing{max-width:0;opacity:0;pointer-events:none}.chat-sidebar.is-collapsed .sidebar-account{padding-right:0}.chat-main{display:flex;flex:1 1;flex-direction:column;min-width:0;height:100vh}.chat-topbar{position:-webkit-sticky;position:sticky;top:0;z-index:3;display:flex;align-items:center;justify-content:space-between;height:52px;padding:0 18px;background:var(--bg-app);border-bottom:1px solid transparent;transition:border-color .2s ease}.chat-topbar.has-scroll{border-bottom-color:var(--border-subtle)}.topbar-model-picker{position:relative}.topbar-title{display:inline-flex;height:36px;min-height:36px;gap:4px;align-items:center;padding:0 10px 0 8px;margin-left:-4px;border-radius:10px;background:transparent;color:#2f2f2f;font-size:18px;font-weight:600;letter-spacing:-.02em;line-height:1}.model-menu{position:absolute;top:calc(100% + 8px);left:0;z-index:8;width:244px;padding:8px;border:1px solid rgba(15,23,42,.08);border-radius:16px;background:#ffffff;box-shadow:none}.model-menu-section-label{padding:6px 8px 8px;font-size:.72rem;font-weight:600;color:var(--text-tertiary)}.model-menu-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow-y:auto;padding-bottom:8px;border-bottom:1px solid rgba(15,23,42,.08)}.model-menu-item{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:52px;padding:9px 10px;border-radius:12px;text-align:left}.model-menu-item.is-active,.model-menu-item:hover{background:#f7f7f8}.model-menu-item-copy{display:flex;flex-direction:column;gap:4px;min-width:0}.model-menu-item strong{font-size:.92rem;font-weight:600}.model-menu-empty,.model-menu-item-copy span{font-size:.73rem;color:var(--text-secondary)}.model-menu-item-check{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;color:var(--text-primary)}.model-menu-empty{padding:10px 12px}.model-menu-config{width:100%;min-height:34px;margin-top:8px;padding:0 10px;border-radius:10px;font-size:.84rem;text-align:left;color:var(--text-primary)}.model-menu-config:hover{background:#f7f7f8}.topbar-actions{display:flex;gap:10px;align-items:flex-start}.topbar-model{padding:9px 14px;border:1px solid var(--border-subtle);border-radius:999px;background:var(--bg-soft);font-size:.82rem;color:var(--text-secondary)}.chat-scroll{flex:1 1;min-height:0;overflow-y:auto}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 64px);padding:42px 18px 56px}.empty-state h1{margin:0 0 36px;font-size:clamp(2rem,3vw,2.35rem);font-weight:600;letter-spacing:-.035em}.empty-composer-wrap{width:100%;display:flex;justify-content:center}.composer-card{display:flex;align-items:center;gap:6px;width:100%;min-height:56px;background:#fff;border:1px solid var(--border-strong);border-radius:999px;box-shadow:none;transition:box-shadow .16s ease,border-color .16s ease,transform .16s ease}.composer-card:focus-within,.composer-card:hover{border-color:rgba(15,23,42,.14);box-shadow:var(--shadow-soft)}.composer-card.is-center{max-width:620px;padding:8px 10px 8px 14px}.composer-card.is-docked{max-width:780px;padding:8px 10px 8px 14px}.composer-input-wrap{position:relative;display:flex;flex-direction:column;flex:1 1;align-items:stretch;min-width:0}.composer-images{display:flex;gap:8px;padding:8px 4px 4px;flex-wrap:wrap}.composer-image-item{position:relative;width:80px;height:80px;border-radius:8px;overflow:hidden;border:1px solid var(--border-light)}.composer-image-item img{width:100%;height:100%;object-fit:cover}.composer-image-remove{position:absolute;top:4px;right:4px;display:flex;align-items:center;justify-content:center;width:20px;height:20px;padding:0;background:rgba(0,0,0,.6);border:none;border-radius:50%;color:#fff;cursor:pointer;transition:background .15s ease}.composer-image-remove:hover{background:rgba(0,0,0,.8)}.composer-textarea{position:relative;z-index:1;width:100%;max-height:160px;padding:10px 4px;background:transparent;pointer-events:auto;cursor:text;-webkit-user-select:text;-moz-user-select:text;user-select:text;resize:none;color:var(--text-primary);line-height:1.5}.composer-textarea::placeholder{color:#9a9aa5}.composer-actions{display:flex;gap:4px;align-items:center}.composer-send{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:999px;background:#111111;color:#ffffff;transition:opacity .16s ease,transform .16s ease}.composer-send:disabled{opacity:.26}.chat-docked-composer{padding:12px 18px 18px;background:linear-gradient(0deg,#ffffff 65%,rgba(255,255,255,0))}.chat-docked-composer .composer-card{margin:0 auto}.chat-footnote{margin:10px 0 0;font-size:.75rem;color:var(--text-tertiary);text-align:center}.thread-wrap{width:100%;max-width:840px;margin:0 auto;padding:14px 20px 132px}.thread-message{display:flex;gap:14px;width:100%;padding:16px 0}.thread-message.is-user{justify-content:flex-end;gap:8px}.assistant-marker{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:28px;height:28px;margin-top:10px;border-radius:999px;color:var(--text-primary)}.message-bubble{max-width:min(100%,760px)}.thread-message.is-user .message-bubble{max-width:min(82%,760px);padding:10px 14px;border-radius:20px;background:var(--bg-muted)}.thread-message.is-assistant .message-bubble{flex:1 1;min-width:0;padding:10px 0 0}.message-markdown{font-size:.99rem;line-height:1.78;color:var(--text-primary);word-break:break-word}.message-markdown>:first-child{margin-top:0}.message-markdown>:last-child{margin-bottom:0}.message-markdown blockquote,.message-markdown ol,.message-markdown p,.message-markdown pre,.message-markdown table,.message-markdown ul{margin:0 0 1rem}.message-markdown h1,.message-markdown h2,.message-markdown h3,.message-markdown h4,.message-markdown h5,.message-markdown h6{margin:1.35rem 0 .65rem;line-height:1.3;letter-spacing:-.025em}.message-markdown ol,.message-markdown ul{padding-left:1.4rem}.message-markdown li+li{margin-top:.32rem}.message-markdown a{color:#0f766e}.message-markdown code{padding:.12rem .38rem;border-radius:8px;background:#f3f3f3;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}.message-markdown pre{overflow-x:auto;padding:14px 16px;border:1px solid var(--border-subtle);border-radius:18px;background:#fafafa}.message-markdown pre code{padding:0;background:transparent}.message-markdown blockquote{padding:.6rem 1rem;border-left:3px solid rgba(15,118,110,.2);color:var(--text-secondary)}.message-markdown table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:14px}.message-markdown td,.message-markdown th{padding:10px 12px;border:1px solid var(--border-subtle);text-align:left}.message-markdown th{background:#f7f7f8}.message-toolbar{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px;opacity:1;transition:opacity .15s ease}.thread-message.is-user .message-toolbar{opacity:0;margin-top:10px}.thread-message.is-user:hover .message-toolbar{opacity:1}.thread-message.is-assistant .message-toolbar{margin-top:8px}.toolbar-button{display:inline-flex;gap:6px;align-items:center;padding:7px 10px;border-radius:999px;color:var(--text-secondary)}.toolbar-button:hover{background:rgba(15,23,42,.04);color:var(--text-primary)}.toolbar-icon-button{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;border-radius:8px;color:var(--text-tertiary);transition:background .12s ease,color .12s ease}.toolbar-icon-button:hover{background:rgba(15,23,42,.06);color:var(--text-primary)}.message-editor{display:flex;flex-direction:column;gap:10px}.message-editor-textarea{position:relative;z-index:1;width:100%;min-height:96px;padding:12px 14px;border:1px solid var(--border-strong);border-radius:16px;background:#ffffff;pointer-events:auto;cursor:text;-webkit-user-select:text;-moz-user-select:text;user-select:text;color:var(--text-primary);line-height:1.65;resize:vertical}.message-editor-textarea:focus{border-color:rgba(15,23,42,.22)}.settings-overlay{position:fixed;inset:0;z-index:5;background:rgba(255,255,255,.52);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);opacity:0;pointer-events:none;transition:opacity .2s ease}.settings-overlay.is-visible{opacity:1;pointer-events:auto}.settings-panel{position:fixed;top:50%;left:50%;z-index:6;display:grid;grid-template-columns:200px 1fr;grid-template-rows:auto 1fr auto;width:min(920px,calc(100vw - 64px));height:min(680px,calc(100vh - 64px));background:#ffffff;border:1px solid rgba(15,23,42,.08);border-radius:22px;box-shadow:0 8px 32px rgba(15,23,42,.12);opacity:0;visibility:hidden;pointer-events:none;overflow:hidden;transform:translate(-50%,-47%) scale(.98);transition:transform .22s ease,opacity .22s ease,visibility .22s ease}.settings-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}.settings-head{grid-column:1/-1;display:flex;align-items:center;justify-content:flex-end;padding:18px 22px;border-bottom:1px solid var(--border-subtle)}.settings-sidebar{grid-column:1;grid-row:2;display:flex;flex-direction:column;gap:2px;padding:12px 12px 12px 18px;border-right:1px solid var(--border-subtle);overflow-y:auto}.settings-tab{display:flex;align-items:center;gap:10px;width:100%;min-height:36px;padding:8px 12px;border-radius:10px;text-align:left;font-size:.88rem;color:var(--text-primary)}.settings-tab:hover{background:#f7f7f8}.settings-tab.is-active{background:#f0f0f1;font-weight:600}.settings-tab svg{flex-shrink:0;color:var(--text-secondary)}.settings-body{grid-column:2;grid-row:2;display:flex;flex-direction:column;gap:20px;padding:24px 28px;overflow-y:auto}.settings-content-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.settings-content-header h2{margin:0;font-size:1.5rem;font-weight:600;letter-spacing:-.02em}.settings-card{display:flex;gap:16px;padding:20px;border:1px solid rgba(15,23,42,.08);border-radius:16px;background:#fafafa}.settings-card-icon{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:48px;height:48px;border-radius:12px;background:#ffffff;color:var(--text-primary)}.settings-card-content{flex:1 1;min-width:0}.settings-card-content h3{margin:0 0 6px;font-size:1rem;font-weight:600}.settings-card-content p{margin:0 0 14px;font-size:.88rem;line-height:1.5;color:var(--text-secondary)}.settings-card-button{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 16px;border:1px solid var(--border-strong);border-radius:999px;background:#ffffff;font-size:.88rem;font-weight:600}.settings-card-button:hover{background:#f7f7f8}.settings-row{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:12px 0;border-bottom:1px solid rgba(15,23,42,.06)}.settings-row:last-child{border-bottom:none}.settings-row-label{font-size:.92rem;font-weight:500}.settings-row-control{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-secondary);cursor:pointer}.settings-row-control:hover{color:var(--text-primary)}.color-dot{width:16px;height:16px;border-radius:999px;background:linear-gradient(135deg,#667eea,#764ba2);border:2px solid #ffffff;box-shadow:0 0 0 1px rgba(15,23,42,.1)}.settings-row-description{padding:8px 0 12px;font-size:.84rem;line-height:1.6;color:var(--text-secondary)}.settings-section h3{margin:0 0 16px;font-size:1.05rem;font-weight:600}.settings-foot{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-top:1px solid var(--border-subtle)}.auth-card,.settings-form,.settings-section{background:transparent;border:none;border-radius:0;box-shadow:none}.settings-form{gap:16px;padding:0}.field,.settings-form{display:flex;flex-direction:column}.field{position:relative;gap:8px}.field span{font-size:.85rem;font-weight:600}.field small{color:var(--text-tertiary)}.auth-input,.field-input,.field-textarea{position:relative;z-index:1;width:100%;padding:13px 14px;border:1px solid var(--border-strong);border-radius:16px;background:#ffffff;pointer-events:auto;cursor:text;-webkit-user-select:text;-moz-user-select:text;user-select:text;color:var(--text-primary);transition:border-color .16s ease}.auth-input:focus,.field-input:focus,.field-textarea:focus{border-color:rgba(15,23,42,.22);box-shadow:none}.field-textarea{resize:vertical;min-height:104px}.settings-actions{display:flex;flex-wrap:wrap;gap:10px}.auth-submit,.ghost-button,.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;font-size:.92rem;font-weight:600}.auth-submit,.primary-button{background:#111111;color:#ffffff}.secondary-button{background:var(--bg-muted);color:var(--text-primary)}.ghost-button{width:100%;background:transparent;border:1px solid var(--border-strong)}.inline-status{font-size:.84rem;color:var(--text-secondary)}.settings-section{border-top:1px solid rgba(15,23,42,.06);padding:20px 0 0}.settings-section:first-of-type{border-top:none;padding-top:0}.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:14px}.section-title h3{margin:0;font-size:.96rem}.section-title span{font-size:.78rem;color:var(--text-tertiary)}.status-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px}.status-card{padding:14px;border-radius:18px;background:var(--bg-soft)}.status-card strong{display:block;margin-bottom:10px;font-size:.84rem}.status-card span{display:block;margin-bottom:8px;font-size:1.2rem;font-weight:700;letter-spacing:-.03em}.status-card p{margin:0;font-size:.8rem;color:var(--text-secondary);line-height:1.55}.model-list{display:flex;flex-wrap:wrap;gap:10px}.model-chip{display:flex;flex-direction:column;gap:4px;min-width:0;padding:12px 14px;border:1px solid var(--border-subtle);border-radius:18px;background:#ffffff;text-align:left}.model-chip.is-active{border-color:rgba(15,23,42,.2);background:var(--bg-soft)}.model-chip strong{font-size:.84rem}.model-chip span{font-size:.75rem;color:var(--text-secondary)}.balance-panel,.empty-panel{padding:14px;border-radius:18px;background:var(--bg-soft)}.balance-panel pre,.empty-panel{margin:0;white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.76rem;line-height:1.6;color:var(--text-secondary)}.auth-page{display:grid;min-height:100vh;padding:24px;place-items:center;background:radial-gradient(circle at top,rgba(15,23,42,.04),transparent 40%),#f7f7f8}.auth-card{width:min(440px,100%);padding:32px}.auth-logo{display:flex;justify-content:center;margin-bottom:20px}.auth-title{margin:0 0 8px;font-size:2rem;font-weight:600;text-align:center;letter-spacing:-.04em}.auth-subtitle{margin:0 0 24px;color:var(--text-secondary);text-align:center}.auth-form{display:flex;flex-direction:column;gap:14px}.auth-submit:disabled,.primary-button:disabled{opacity:.45}.form-error{margin:0;color:#c2410c;font-size:.88rem}.auth-footer-note{margin-top:18px;font-size:.9rem;color:var(--text-secondary);text-align:center}@media (max-width:960px){.chat-sidebar{position:fixed;left:0;top:0;bottom:0;z-index:101;box-shadow:2px 0 8px rgba(0,0,0,.1)}.chat-sidebar.is-collapsed{transform:translateX(-100%);width:258px;min-width:258px}.settings-overlay{z-index:100}.settings-overlay.is-visible{display:block}.mobile-menu-button{display:inline-flex}.chat-main{width:100%}.thread-wrap{padding-bottom:132px}}@media (max-width:720px){.chat-topbar{padding:12px 14px 8px;justify-content:center;position:relative}.mobile-menu-button{position:absolute;left:14px}.topbar-actions{position:absolute;right:14px}.topbar-model-picker{flex:0 0 auto}.topbar-model{display:none}.empty-state{justify-content:flex-start;min-height:auto;padding-top:20vh}.empty-state h1{margin-bottom:24px;font-size:1.9rem;text-align:center}.composer-card.is-center,.composer-card.is-docked{max-width:100%}.chat-docked-composer,.thread-wrap{padding-inline:14px}.thread-message.is-user .message-bubble{max-width:100%}.status-grid{grid-template-columns:1fr}.settings-body,.settings-foot,.settings-head{padding-inline:16px}.settings-panel{width:calc(100vw - 24px);height:calc(100vh - 24px);grid-template-columns:1fr;grid-template-rows:auto auto 1fr auto}.settings-sidebar{grid-column:1;grid-row:2;flex-direction:row;gap:8px;padding:12px 16px;border-right:none;border-bottom:1px solid var(--border-subtle);overflow-x:auto;overflow-y:hidden}.settings-tab{flex-shrink:0;white-space:nowrap}.settings-body{grid-column:1;grid-row:3;padding:20px 16px}.auth-card{padding:26px 22px;border-radius:22px}}