:root{color-scheme:light dark;--canvas:#f4f6fb;--surface:#fff;--surface-muted:#eef2f7;--border:#dbe3ef;--text:#182235;--muted:#66748a;--primary:#6258e8;--primary-strong:#4f46cf;--primary-soft:#edeaff;--danger:#b42318;--success:#067647;--shadow:0 10px 28px rgb(31 48 78 / 8%)}
@media(prefers-color-scheme:dark){:root{--canvas:#111724;--surface:#182131;--surface-muted:#202b3d;--border:#2f3d53;--text:#f2f5fb;--muted:#b2bed0;--primary:#9189ff;--primary-strong:#aaa5ff;--primary-soft:#2d2a56;--danger:#ffb4ab;--success:#85e0b3;--shadow:0 10px 28px rgb(0 0 0 / 20%)}}
*{box-sizing:border-box}html,body{width:100%;height:100%;min-width:320px;min-height:100%;margin:0;overflow:hidden}body{background:var(--canvas);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}.app-shell{display:grid;grid-template-columns:minmax(224px,278px) minmax(0,1fr);width:100%;height:100dvh;min-height:420px}.workspace-sidebar{display:flex;min-width:0;flex-direction:column;gap:12px;overflow:hidden;border-right:1px solid var(--border);background:var(--surface);padding:14px}.sidebar-brand,.app-header,.panel-heading,.composer-footer,.key-row,.header-title-group,.header-actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.sidebar-brand{min-height:34px}.sidebar-brand strong{display:block;margin-top:2px;font-size:17px;letter-spacing:-.03em}.app-main{display:grid;min-width:0;min-height:0;grid-template-rows:auto minmax(0,1fr) auto;background:var(--canvas)}.app-header{min-height:58px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 92%,transparent);padding:10px 14px}.app-header h1{max-width:40vw;overflow:hidden;margin:0;font-size:18px;letter-spacing:-.035em;text-overflow:ellipsis;white-space:nowrap}.eyebrow,.message-role{margin:0;color:var(--primary);font-size:11px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}h1,h2,p{margin-top:0}h2{margin:0;font-size:14px}.icon-button,.secondary-button,.new-chat-button,.sidebar-tab,.small-button{border:1px solid var(--border);background:var(--surface);color:var(--text)}.icon-button{width:34px;height:34px;border-radius:10px;font-size:18px}.icon-button:hover,.secondary-button:hover,.small-button:hover{border-color:var(--primary);color:var(--primary)}.sidebar-close-button{flex:0 0 auto}.new-chat-button,.sidebar-tab,.primary-button,.upload-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-height:36px;border-radius:9px;padding:8px 11px;font-size:13px;font-weight:700}.new-chat-button{width:100%;border-color:var(--primary);background:var(--primary-soft);color:var(--primary)}.new-chat-button:hover{background:color-mix(in srgb,var(--primary-soft) 80%,var(--primary) 20%)}.sidebar-tabs{display:grid;grid-template-columns:1fr 1.25fr;gap:5px;border-radius:10px;background:var(--surface-muted);padding:4px}.sidebar-tab{min-height:31px;border-color:transparent;background:transparent;padding:5px 7px;font-size:12px}.sidebar-tab.is-active{border-color:var(--border);background:var(--surface);color:var(--primary);box-shadow:0 2px 6px rgb(31 48 78 / 8%)}.tab-count{display:inline-flex;min-width:18px;justify-content:center;border-radius:99px;background:var(--primary-soft);color:var(--primary);font-size:10px}.sidebar-panel{display:grid;align-content:start;gap:9px;min-height:0;overflow-y:auto;padding:1px}.sidebar-panel[hidden]{display:none}.field-label{display:grid;gap:6px;color:var(--muted);font-size:12px;font-weight:700}input[type=text],input[type=password],textarea,select{width:100%;border:1px solid var(--border);border-radius:9px;outline:none;background:var(--surface);color:var(--text)}input[type=text],input[type=password]{min-width:0;padding:9px 10px;font-size:13px}select{padding:9px 10px;font-size:12px}textarea{min-height:76px;resize:none;padding:10px 11px;line-height:1.5}input:focus,textarea:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 18%,transparent)}.secondary-button{flex:0 0 auto}.compact-button{min-height:34px;padding:7px 9px}.primary-button{border:1px solid var(--primary);background:var(--primary);color:#fff}.primary-button:hover{border-color:var(--primary-strong);background:var(--primary-strong)}.primary-button:disabled,.secondary-button:disabled,.new-chat-button:disabled{cursor:not-allowed;opacity:.55}.checkbox-row,.count-control{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:12px}.checkbox-row input{accent-color:var(--primary)}.hint,.status-message,.message-note,.panel-caption,.composer-help,.sidebar-footer,.empty-history-message,.history-preview,.history-time{margin:0;color:var(--muted);font-size:11px;line-height:1.45}.api-badge{border-radius:999px;background:var(--primary-soft);color:var(--primary);padding:4px 8px;font-size:11px;font-weight:750}.sidebar-footer{margin-top:auto;padding:3px 1px 0}.history-list{display:grid;gap:6px;min-height:0;overflow-y:auto}.history-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:5px;align-items:stretch}.history-open-button{min-width:0;border:1px solid var(--border);border-radius:9px;background:var(--surface-muted);color:var(--text);padding:8px 9px;text-align:left}.history-open-button:hover,.history-item.is-active .history-open-button{border-color:var(--primary);background:var(--primary-soft)}.history-title,.history-preview{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-title{font-size:12px;font-weight:750}.history-preview{margin-top:3px}.history-time{display:block;margin-top:3px}.history-delete-button{width:27px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--danger);font-size:16px}.chat-log{display:flex;min-height:0;flex-direction:column;gap:12px;overflow-y:auto;padding:14px;overscroll-behavior:contain}.message{border:1px solid var(--border);border-radius:14px;background:var(--surface);box-shadow:var(--shadow);padding:12px}.message p:last-child{margin-bottom:0}.user-message{align-self:flex-end;width:min(88%,720px);background:var(--primary-soft)}.assistant-message{align-self:flex-start;width:min(92%,780px)}.message.error{border-color:color-mix(in srgb,var(--danger) 55%,var(--border))}.message-body{margin:7px 0 0;white-space:pre-wrap;word-break:break-word;line-height:1.5}.message-meta{display:flex;align-items:center;justify-content:flex-end;margin-top:8px}.message-time{color:var(--muted);font-size:11px}.image-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}.result-image-card{min-width:0;margin:0;overflow:hidden;border:1px solid var(--border);border-radius:10px;background:var(--surface-muted)}.result-image-card img{display:block;width:100%;aspect-ratio:1;object-fit:cover}.result-image-card figcaption{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:6px 8px}.download-link,.reuse-image-button{color:var(--primary);font-size:12px;font-weight:700;text-decoration:none}.reuse-image-button{border:0;border-radius:6px;background:transparent;padding:2px 0}.composer-card{position:sticky;bottom:0;z-index:5;display:grid;gap:8px;border-top:1px solid var(--border);background:color-mix(in srgb,var(--surface) 97%,transparent);box-shadow:0 -8px 24px rgb(31 48 78 / 8%);padding:10px 14px 12px}.composer-card.is-dragging{border-top-color:var(--primary)}.drop-overlay{position:absolute;inset:7px;display:grid;place-items:center;border:2px dashed var(--primary);border-radius:11px;background:color-mix(in srgb,var(--primary-soft) 88%,transparent);color:var(--primary);font-size:14px;font-weight:750;opacity:0;pointer-events:none;transform:translateY(4px);transition:opacity 120ms ease,transform 120ms ease}.composer-card.is-dragging .drop-overlay{opacity:1;transform:translateY(0)}.reference-preview{display:flex;flex-wrap:wrap;gap:7px}.reference-item{position:relative;overflow:hidden;width:58px;height:58px;border:1px solid var(--border);border-radius:9px;background:var(--surface-muted)}.reference-item img{display:block;width:100%;height:100%;object-fit:cover}.remove-reference-button{position:absolute;top:3px;right:3px;width:19px;height:19px;border:0;border-radius:99px;background:rgb(0 0 0 / 72%);color:#fff;line-height:1}.composer-input-row{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:end;gap:8px}.upload-button{min-width:65px;border:1px dashed var(--border);color:var(--primary)}.upload-button:hover{border-color:var(--primary);background:var(--primary-soft)}.upload-button input{display:none}.composer-controls{justify-content:space-between}.composer-help{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status-message{min-height:16px}.status-message.is-error{color:var(--danger)}.status-message.is-success{color:var(--success)}.app-shell.sidebar-collapsed{grid-template-columns:minmax(0,1fr)}.app-shell.sidebar-collapsed .workspace-sidebar{display:none}
@media(max-width:640px){.app-shell{display:block;position:relative}.workspace-sidebar{position:fixed;inset:0 auto 0 0;z-index:20;width:min(86vw,290px);box-shadow:14px 0 30px rgb(0 0 0 / 18%);transform:translateX(-102%);transition:transform 160ms ease}.app-shell.mobile-sidebar-open .workspace-sidebar{transform:translateX(0)}.app-main{width:100%;height:100dvh}.app-shell.sidebar-collapsed .workspace-sidebar{display:flex}.app-shell.sidebar-collapsed:not(.mobile-sidebar-open) .workspace-sidebar{transform:translateX(-102%)}.chat-log{padding:10px}.composer-card{padding:9px 10px 10px}.user-message,.assistant-message{width:100%}.composer-help{font-size:10px}}
@media(max-width:390px){.app-header{padding-inline:10px}.app-header h1{max-width:38vw}.active-task-summary{display:none}.composer-input-row{grid-template-columns:minmax(0,1fr)}.upload-button{width:fit-content}}
.preview-image-button{display:block;width:100%;border:0;background:transparent;padding:0;line-height:0}.preview-image-button:focus-visible{outline:3px solid var(--primary);outline-offset:-3px}.preview-image-button img{cursor:zoom-in}.preview-text-button{border:0;background:transparent;color:var(--primary);padding:2px 0;font-size:12px;font-weight:700}.result-image-card figcaption{justify-content:flex-start}.reuse-image-button{margin-left:auto}.image-preview-dialog{width:min(960px,calc(100vw - 28px));max-width:960px;height:min(92dvh,900px);max-height:92dvh;overflow:hidden;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--text);box-shadow:0 24px 70px rgb(0 0 0 / 36%);padding:0}.image-preview-dialog::backdrop{background:rgb(0 0 0 / 66%)}.image-preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--border);padding:10px 12px}.image-preview-title{overflow:hidden;font-size:13px;font-weight:750;text-overflow:ellipsis;white-space:nowrap}.image-preview-actions{display:flex;align-items:center;gap:7px}.image-preview-download{min-height:34px;text-decoration:none}.image-preview-dialog>img{display:block;max-width:100%;width:auto;height:calc(100% - 57px);max-height:calc(100% - 57px);margin:auto;object-fit:contain}@media(max-width:480px){.image-preview-dialog{width:calc(100vw - 16px);height:min(88dvh,720px)}.image-preview-toolbar{padding:8px}.image-preview-download{padding-inline:8px}.image-preview-dialog>img{height:calc(100% - 53px);max-height:calc(100% - 53px)}}

.reference-index{position:absolute;left:3px;bottom:3px;display:grid;min-width:18px;height:18px;place-items:center;border-radius:99px;background:rgb(0 0 0 / 68%);color:#fff;font-size:10px;font-weight:750;line-height:1}

/* Web/mobile layout fixes: long help text must not widen the fixed composer. */
.app-main,.composer-card,.composer-footer{min-width:0}
.composer-help{min-width:0;flex:1}
@media(max-width:390px){.composer-footer{align-items:center;gap:7px}.primary-button{white-space:nowrap}}

.ios-install-hint{margin:0;border:1px solid color-mix(in srgb,var(--primary) 22%,var(--border));border-radius:9px;background:var(--primary-soft);padding:8px 9px;color:var(--text);font-size:11px;line-height:1.45}.ios-install-hint strong{color:var(--primary)}

/* Mobile app mode: lock the page canvas to avoid accidental Safari pinch/focus zoom. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media(max-width:640px){
  html,body{overscroll-behavior:none}
  input[type=text],input[type=password],textarea,select{font-size:16px}
  .app-main{touch-action:pan-y}
}