:root{color-scheme:light;--bg:#fff;--side:#f9f8f7;--raised:#f0efed;--text:#2c2c2b;--muted:#686660;--border:#e6e5e3;--blue:#1769b6;--tint:#e5f2fc;--shadow:0 4px 24px #0000000b}*{box-sizing:border-box}body{margin:0;font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}button,input,textarea{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #2783de;outline-offset:3px}button{min-height:44px;border:0;background:none;border-radius:8px}button:hover{background:var(--raised)}svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;vertical-align:middle;flex-shrink:0}button:disabled{cursor:wait;opacity:.5}.app{display:flex;height:100dvh;min-height:520px}.sidebar{width:260px;flex-shrink:0;background:var(--side);border-right:1px solid var(--border);padding:28px 20px 20px;display:flex;flex-direction:column;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:23px;letter-spacing:-1px;font-weight:650}.logo{height:32px;width:32px;border:1.5px solid var(--blue);border-radius:50%;display:inline-grid;place-items:center;transform:rotate(-25deg);color:var(--blue)}.logo:after{content:'';width:30px;height:12px;border:1.5px solid var(--blue);border-radius:50%}.new{width:100%;background:var(--bg);border:1px solid var(--border);display:flex;align-items:center;gap:10px;padding:10px 12px;text-align:left;box-shadow:0 1px 2px #00000005}.new span:last-child{margin-left:auto;color:var(--muted);font-size:14px}.label{font-size:14px;color:var(--muted)}.history{overflow:auto;flex:1;min-height:60px}.history>p{padding:0 10px}.history-row{display:flex;align-items:center;margin:4px 0;border-radius:8px}.history-row.active{background:var(--raised)}.history-row .open{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:left;padding:10px;font-size:14px}.history-row .remove{font-size:18px;width:44px;flex-shrink:0;color:var(--muted)}.side-bottom{border-top:1px solid var(--border);padding-top:16px}.catalog-btn{width:100%;text-align:left;display:flex;gap:10px;align-items:center;padding:8px 10px}.profile{display:flex;align-items:center;gap:10px;padding:16px 8px 0;font-size:14px}.avatar{display:grid;place-items:center;border-radius:8px;width:34px;height:34px;background:var(--tint);color:var(--blue);font-weight:600}.profile small{display:block;font-size:14px;color:var(--muted)}.main{flex:1;min-width:0;display:flex;flex-direction:column;position:relative}.topbar{flex-shrink:0;height:84px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);gap:12px}.top-left,.top-right{display:flex;align-items:center;gap:12px}.model-trigger{display:flex;align-items:center;gap:10px;padding:8px 12px;font-weight:600}.model-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--tint);color:var(--blue);font-size:16px;font-weight:650}.badge{font-size:14px;color:var(--muted);padding:3px 9px;background:var(--side);border:1px solid var(--border);border-radius:6px}.icon-btn{width:44px;padding:8px}.mobile-menu{display:none}.workspace{min-height:0;flex:1;overflow:auto;padding:32px 32px 24px;display:flex;flex-direction:column}.welcome{flex-shrink:0;width:100%;max-width:760px;margin:auto; padding:28px 0}.eyebrow{font-size:14px;color:var(--blue);display:flex;align-items:center;gap:8px;margin-bottom:20px}.eyebrow:before{content:'';width:6px;height:6px;background:var(--blue);border-radius:50%}h1{font-size:clamp(32px,4vw,46px);line-height:1.15;letter-spacing:-1.8px;font-weight:600;margin:0 0 20px;max-width:650px}h1 span{color:var(--muted)}.intro{color:var(--muted);max-width:540px;margin:0 0 32px}.models{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:40px}.model-chip{border:1px solid var(--border);padding:7px 12px;font-size:14px;display:flex;align-items:center;gap:8px}.model-chip.selected{border-color:var(--blue);background:var(--tint);color:var(--blue)}.dot{width:6px;height:6px;border-radius:50%;background:currentColor}.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:12px}.suggestion{text-align:left;border:1px solid var(--border);padding:18px 20px;min-height:110px;display:flex;flex-direction:column;align-items:flex-start}.suggestion svg{color:var(--blue);margin-bottom:12px}.suggestion strong{font-size:15px;font-weight:550}.suggestion span{font-size:14px;color:var(--muted);margin-top:3px}.composer-area{padding:12px 32px 18px;flex-shrink:0}.composer-wrap{max-width:800px;margin:auto}.composer{border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:var(--shadow);background:var(--bg)}textarea{resize:none;display:block;width:100%;height:54px;max-height:140px;border:0;background:transparent;color:var(--text);outline:none;line-height:1.5;padding:0}textarea:focus-visible{outline:none}textarea::placeholder{color:var(--muted)}.composer:focus-within{border-color:var(--blue)}.composer-tools{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:8px}.context{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:8px}.send{width:44px;min-height:44px;background:var(--blue);color:white;display:grid;place-items:center}.send:hover{background:#125695}.footnote{text-align:center;font-size:14px;color:var(--muted);margin:10px 0 0}.messages{width:100%;max-width:760px;margin:0 auto}.message{margin:0 0 28px;white-space:pre-wrap;overflow-wrap:anywhere}.message.user{background:var(--side);border:1px solid var(--border);padding:16px 20px;border-radius:12px;margin-left:60px}.message-head{display:flex;gap:10px;align-items:center;margin-bottom:12px;font-weight:600;font-size:14px;white-space:normal}.message-head small{font-size:14px;font-weight:400;color:var(--muted)}.message-body{padding-left:40px;line-height:1.7}.switch-note{font-size:14px;color:var(--muted);text-align:center;margin:12px 0 24px}.hidden{display:none!important}dialog{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:12px;padding:24px;width:min(540px,calc(100% - 32px));box-shadow:0 20px 70px #0002;max-height:85dvh}dialog::backdrop{background:#141c2a66;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:8px}h2{font-size:24px;letter-spacing:-.5px;margin:0}.dialog-desc{color:var(--muted);font-size:14px;margin:0 0 20px}.model-option{width:100%;display:flex;align-items:center;gap:12px;padding:12px;text-align:left;border:1px solid var(--border);margin-top:8px}.model-option .details{flex:1}.model-option strong{display:block;font-size:16px}.model-option small{display:block;font-size:14px;color:var(--muted)}.check{color:var(--blue)}.demo-note{padding:14px;background:var(--side);border-radius:8px;font-size:14px;color:var(--muted);margin-top:20px}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:10;background:var(--text);color:var(--bg);padding:12px 20px;border-radius:8px;box-shadow:var(--shadow);width:max-content;max-width:90%;font-size:14px}.scrim{display:none}
@media(min-width:651px){.welcome{padding:8px 0}.intro{margin-bottom:24px}.models{margin-bottom:24px}.suggestion{min-height:100px;padding:16px 20px}.suggestion svg{margin-bottom:8px}}
@media(min-width:1400px){.sidebar{width:280px}.welcome{max-width:800px}}
@media(max-width:850px){.sidebar{width:230px;padding:24px 16px}.topbar{padding:0 20px}.workspace{padding:24px}.composer-area{padding:8px 24px 16px}.badge.desktop{display:none}h1{font-size:36px}.models{margin-bottom:28px}}
@media(max-width:650px){.app{min-height:420px}.sidebar{position:fixed;inset:0 auto 0 0;z-index:5;width:280px;transform:translateX(-100%);transition:transform .18s}.sidebar.visible{transform:translateX(0)}.scrim.visible{display:block;position:fixed;inset:0;background:#0006;z-index:4;border-radius:0;width:100%}.mobile-menu{display:block}.topbar{height:68px;padding:0 12px}.top-left{gap:2px}.top-right{gap:0}.model-trigger{padding:8px}.workspace{padding:24px 20px 12px}.welcome{padding:12px 0;margin:0 auto}.eyebrow{margin-bottom:16px}h1{font-size:34px;letter-spacing:-1.1px}.intro{font-size:15px;margin-bottom:24px}.models{gap:6px;margin-bottom:24px}.model-chip{padding:6px 10px}.suggestions{gap:8px}.suggestion{padding:14px;min-height:118px}.suggestion span{display:none}.suggestion strong{font-size:14px}.composer-area{padding:8px 16px 12px}.composer{padding:12px}.footnote{font-size:12px}.context{font-size:12px}.message.user{margin-left:24px}.message-body{padding-left:0}.badge{font-size:12px}.top-right .badge{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Rounded, quiet surfaces; explicit light/dark choice takes precedence over OS. */
:root{--bg:#fff;--side:#f5f5f7;--raised:#eaeaf0;--text:#1d1d1f;--muted:#66666e;--border:#dfdfe5;--blue:#0066cc;--tint:#eaf3ff;--shadow:0 8px 32px #15234a08;--canvas:#f5f5f7;--glass:#ffffffd9}
:root[data-theme="dark"]{color-scheme:dark;--bg:#1c1c1e;--side:#242426;--raised:#343437;--text:#f5f5f7;--muted:#b1b1ba;--border:#404044;--blue:#8dc4ff;--tint:#25374b;--canvas:#101012;--glass:#1c1c1ee0;--shadow:0 8px 32px #0002}
@media(prefers-color-scheme:dark){:root[data-theme="system"]{color-scheme:dark;--bg:#1c1c1e;--side:#242426;--raised:#343437;--text:#f5f5f7;--muted:#b1b1ba;--border:#404044;--blue:#8dc4ff;--tint:#25374b;--canvas:#101012;--glass:#1c1c1ee0;--shadow:0 8px 32px #0002}}
body{background:var(--canvas)}button{border-radius:14px;transition:background .15s,transform .15s}.app{height:100dvh;padding:12px;gap:12px}.sidebar{border:0;border-radius:26px;background:var(--canvas);padding:24px 16px 16px;width:252px;gap:20px}.main{background:var(--bg);border:1px solid var(--border);border-radius:28px;overflow:hidden;box-shadow:var(--shadow)}.topbar{border-bottom:0;height:80px;background:var(--glass);backdrop-filter:blur(18px);padding:0 24px}.new{border-radius:16px;box-shadow:var(--shadow);padding:12px 14px}.brand{padding:0 8px}.brand .label{font-size:12px;letter-spacing:1px!important;text-transform:uppercase}.history-row{border-radius:14px}.history-row .open{padding:12px}.model-trigger{border-radius:14px;max-width:330px}.model-trigger #currentName{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-mark{border-radius:10px;flex-shrink:0}.badge{border-radius:20px;background:var(--side);padding:4px 10px}.model-chip{border-radius:22px}.suggestion{border-radius:20px;background:var(--side);border-color:transparent;padding:18px 20px;min-height:108px}.suggestion:hover{background:var(--raised)}.suggestion svg{margin-bottom:12px}.composer{border-radius:26px;padding:18px 20px;border-color:var(--border);background:var(--side);box-shadow:none}.send{border-radius:50%;background:#0066cc;color:#fff}.send:hover{background:#0054a8}.composer-area{padding:12px 32px 18px}.message.user{border-radius:22px}.message-body{font-size:16px}.avatar{border-radius:50%}.profile{width:100%;text-align:left;padding:12px 8px;margin-top:8px;min-width:0}.profile div:last-child{min-width:0}.profile strong{font-size:14px;font-weight:550;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile small{font-size:12px}.profile .avatar{flex-shrink:0}.theme-options{display:flex;gap:4px;background:var(--raised);border-radius:14px;padding:4px;margin-top:16px}.theme-options button{flex:1;min-width:0;font-size:12px;min-height:36px;padding:6px 4px;border-radius:10px;color:var(--muted)}.theme-options button[aria-pressed="true"]{background:var(--bg);color:var(--text);box-shadow:0 1px 4px #0001}.login-top{background:var(--text);color:var(--bg);padding:8px 18px;border-radius:22px;font-size:14px;font-weight:550}.login-top:hover{background:var(--blue);color:var(--bg)}.top-right{gap:8px}h1{font-size:clamp(34px,4vw,46px);letter-spacing:-1.9px;line-height:1.12;font-weight:650}h1 span{color:var(--muted)}.eyebrow{font-size:12px;letter-spacing:1.5px;margin-bottom:18px}.intro{font-size:16px}.welcome{max-width:760px;padding:8px 0}.workspace{padding:16px 32px 24px}.models{margin-bottom:24px}.intro{margin-bottom:24px}.footnote{font-size:12px}dialog{border-radius:28px;padding:28px;width:min(560px,calc(100% - 32px));box-shadow:0 32px 120px #0003}dialog::backdrop{background:#12121b66;backdrop-filter:blur(10px)}.model-option{border-radius:16px;padding:14px}.model-option .details{min-width:0}.model-option strong,.model-option small{overflow-wrap:anywhere}.model-option small{font-size:12px}.model-option{min-height:74px}.price-label{font-size:12px;color:var(--muted);flex-shrink:0}#modelOptions{max-height:48dvh;overflow:auto;padding:2px}.demo-note{border-radius:16px;font-size:14px;line-height:1.6}.auth-label{display:block;font-size:14px;font-weight:550;margin:24px 0 8px}.auth-input{border:1px solid var(--border);background:var(--side);color:var(--text);padding:14px 16px;border-radius:14px;width:100%;min-height:52px}.auth-submit{width:100%;border-radius:16px;padding:14px;background:#0066cc;color:#fff;margin:16px 0 0;font-weight:550}.auth-submit:hover{background:#0054a8}.auth-note{font-size:12px;line-height:1.7;color:var(--muted);margin:16px 0 0}.auth-error{color:#b62929;font-size:14px;margin:12px 0 0;overflow-wrap:anywhere}:root[data-theme="dark"] .auth-error{color:#ffaaa1}.auth-success{color:var(--blue);font-size:14px}.auth-link{color:var(--blue);font-size:14px;padding:8px 12px}.auth-top-icon{height:48px;width:48px;border:1px solid var(--border);border-radius:16px;display:grid;place-items:center;color:var(--blue);margin-bottom:24px}.account-email{overflow-wrap:anywhere}.privacy-text{font-size:14px;line-height:1.7;color:var(--muted)}.error-message{border-left:3px solid #c84135;padding:12px 16px;background:var(--side);border-radius:0 12px 12px 0;white-space:normal}.error-message button{margin-top:8px;color:var(--blue);display:block;padding:8px 12px}.context-banner{font-size:12px;color:var(--muted);margin-bottom:24px;text-align:center}#toast{border-radius:16px}.theme-icon{font-size:21px;line-height:1}.theme-options button{min-height:44px}.auth-input::placeholder{color:var(--muted)}
@media(min-width:1400px){.sidebar{width:260px}.welcome{max-width:760px}}
@media(max-width:1000px){.badge.desktop{display:none}.topbar{padding:0 16px}.sidebar{width:228px}.workspace{padding:16px 24px}.composer-area{padding:12px 24px 16px}.context{font-size:12px}}
@media(max-width:650px){.app{padding:0;gap:0;min-height:420px}.main{border:0;border-radius:0;box-shadow:none}.sidebar{width:282px;border-radius:0 24px 24px 0;background:var(--side);padding:24px 16px 16px}.topbar{height:68px;padding:0 12px}.top-right{gap:2px}.top-right #export{display:none}.login-top{padding:8px 14px}.model-trigger{max-width:164px;gap:7px;padding:8px}.model-trigger .model-mark{display:none}.model-trigger #currentName{max-width:120px;font-size:14px}.top-left{min-width:0}.workspace{padding:16px 20px 12px}.welcome{padding:12px 0}.eyebrow{font-size:10px;letter-spacing:1px;margin-bottom:16px}h1{font-size:35px;letter-spacing:-1.4px}.intro{font-size:15px;line-height:1.6}.models{gap:6px;margin-bottom:20px}.model-chip{font-size:12px;padding:6px 12px}.suggestion{padding:16px;min-height:100px;border-radius:18px}.suggestion svg{margin-bottom:12px}.suggestion span{display:none}.suggestion strong{font-size:14px}.composer-area{padding:8px 12px 12px}.composer{padding:16px;border-radius:24px}.context{font-size:11px;gap:6px}.context svg{width:16px}.footnote{font-size:11px}.message.user{margin-left:24px}.message-body{padding-left:0}dialog{padding:24px;border-radius:24px}.dialog-head h2{font-size:22px}.model-option{padding:12px}.theme-options{margin-top:12px}.side-bottom{padding-top:12px}.profile small{font-size:12px}.message-head{flex-wrap:wrap}.auth-note{font-size:12px}}
/* Keep small functional text readable on phones as well as desktop. */
.brand .label,.profile small,.theme-options button,.eyebrow,.footnote,.model-option small,.price-label,.auth-note,.context-banner{font-size:14px}
@media(max-width:650px){.eyebrow{font-size:14px;letter-spacing:.5px}.model-chip,.context,.footnote,.badge,.auth-note,.profile small{font-size:14px}.context{gap:6px}.welcome{padding:8px 0}.intro{margin-bottom:16px}.models{margin-bottom:16px}.suggestion{min-height:92px}.footnote{line-height:1.4}.model-chip{padding:6px 10px}.top-right .badge{font-size:14px}}
@media(prefers-color-scheme:dark){:root[data-theme="system"] .auth-error{color:#ffaaa1}}
/* v3: fewer decisions, clear access and Russian labels. */
.brand .label{font-size:14px;text-transform:none;letter-spacing:0!important}.eyebrow{letter-spacing:.8px;font-size:14px}h1{font-size:42px;letter-spacing:-1.7px}.welcome{max-width:760px}.intro{max-width:570px}.model-chip{padding:7px 12px}.nav-glyph{display:inline-grid;place-items:center;width:20px;font-size:22px}.nav-note{margin-left:auto;color:var(--muted);font-size:14px}.side-bottom{padding-top:10px}.catalog-btn{min-height:44px}.theme-options{margin-top:10px}.profile{margin-top:8px}.bottom-line{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:8px}.bottom-line .footnote{text-align:left;margin:0}.support-link{min-width:96px;padding:8px 12px;font-size:14px;background:var(--side);color:var(--text);white-space:nowrap}.admin-entry{position:fixed;left:28px;bottom:4px;font-size:14px;color:var(--muted);text-decoration:none;z-index:1}.sidebar{padding-bottom:28px}.price-label{font-size:14px}.access-summary{padding:16px;border:1px solid var(--border);border-radius:16px;background:var(--side)}h3{font-size:18px;margin:24px 0 12px}.order-row{display:flex;flex-direction:column;gap:4px;border-bottom:1px solid var(--border);padding:12px 0}.order-row strong{font-size:14px}.order-row .auth-link{align-self:flex-start;padding-left:0}.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.plan-card{border:1px solid var(--border);border-radius:20px;padding:20px;display:flex;flex-direction:column;align-items:stretch}.plan-card h3{margin:0 0 12px}.plan-price{font-size:26px;font-weight:600;letter-spacing:-.6px}.plan-card ul{padding-left:20px;font-size:14px;flex:1}.plan-card .auth-submit{font-size:14px;min-height:48px}.consent{display:flex;align-items:flex-start;gap:10px;font-size:14px;margin:20px 0;line-height:1.7}.consent input{width:20px;height:20px;flex-shrink:0;margin-top:4px}.consent a{color:var(--blue);margin-right:8px}#plansDialog{width:min(720px,calc(100% - 32px))}#supportDialog{position:fixed;margin:0;inset:auto 28px 28px auto;width:420px;max-height:calc(100dvh - 56px);height:620px;padding:24px;display:none}#supportDialog[open]{display:flex;flex-direction:column}#supportDialog h2{font-size:22px}#supportDialog .dialog-head{flex-shrink:0}#supportDialog .dialog-head .label{font-size:14px}.support-tools{display:flex;gap:8px;border-bottom:1px solid var(--border);padding:8px 0}.support-tools button{font-size:14px;padding:6px 12px;color:var(--blue)}#supportLog{flex:1;overflow:auto;min-height:80px;padding:16px 0;overscroll-behavior:contain}.support-msg{padding:12px 14px;background:var(--side);border-radius:16px;margin-bottom:12px;font-size:14px;overflow-wrap:anywhere;white-space:pre-wrap}.support-msg.user{margin-left:28px;background:var(--tint)}.support-msg strong{font-size:14px;font-weight:550}.support-msg p{margin:8px 0 0}.support-msg.admin{border:1px solid var(--blue)}#supportForm{display:flex;align-items:flex-end;gap:12px;padding:12px;border:1px solid var(--border);border-radius:18px;background:var(--side);flex-shrink:0}#supportForm textarea{font-size:14px;height:54px}.support-disclosure{font-size:14px;line-height:1.5;color:var(--muted);margin:12px 0 0}.support-tools button:disabled{opacity:.5}.plan-card button:disabled{cursor:not-allowed}.brand{gap:8px}.theme-options button{font-size:14px}.admin-entry:hover{text-decoration:underline}
@media(max-height:850px) and (min-width:651px){.workspace{padding-top:8px}.welcome{padding:0}.welcome .intro{margin-bottom:16px}.welcome .models{margin-bottom:16px}.welcome .suggestion{padding:14px 18px;min-height:94px}.eyebrow{margin-bottom:12px}h1{font-size:38px;margin-bottom:16px}.sidebar{gap:12px}}
@media(max-width:650px){h1{font-size:32px;letter-spacing:-1.1px}.eyebrow{font-size:14px;letter-spacing:0}.welcome{padding:4px 0}.intro{font-size:15px}.brand .label{font-size:14px}.plan-grid{grid-template-columns:1fr}.plan-card{padding:18px}#supportDialog{inset:12px;margin:0;width:calc(100% - 24px);height:calc(100dvh - 24px);max-height:none;padding:20px}.bottom-line{gap:8px;align-items:flex-start}.support-link{min-width:88px}.bottom-line .footnote{font-size:14px;line-height:1.4}.admin-entry{display:none}.sidebar{padding-bottom:20px}.plan-price{font-size:24px}.workspace{padding-top:12px}.suggestion{min-height:88px;padding:14px}.model-trigger{max-width:170px}.top-right .login-top{padding:8px 12px}.theme-options{margin-top:8px}}

#supportContact{margin:8px 0 0;font-size:14px;overflow-wrap:anywhere}#supportContact:empty{display:none}#supportContact a{color:var(--blue)}

#accountAccess{margin-bottom:12px}.account-admin-link{display:inline-flex;align-items:center;min-height:44px;padding:8px 4px;white-space:nowrap;font-size:14px;color:var(--blue)}