:root{--paper:#fff;--wash:#f7f7f8;--ink:#171d20;--muted:#68686d;--accent:#fe5858;--accent-ink:#b7292b;--on-accent:#171d20;--line:#e8e8ea;--soft:#fff0f0;--warning:#854e12;font:16px/1.6 Manrope,system-ui,sans-serif;color:var(--ink);font-synthesis:none;background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit;color:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0}button:disabled{cursor:default;opacity:.5}[hidden]{display:none!important}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,.paper-wrap:focus-visible,.conversation:focus-visible{outline:3px solid #fe5858;outline-offset:3px}
a{color:var(--accent-ink);text-underline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600;line-height:1.25;letter-spacing:-.035em}h1{font-size:34px}h2{font-size:27px}h3{font-size:18px}p{color:var(--muted)}
/* A quiet start screen becomes the conversation after the first request. */
.workspace{overflow-anchor:none;height:100vh;height:100dvh;background:var(--paper);display:flex;flex-direction:column;align-items:center;padding:18px 32px 12px;gap:0}
.workspace-brand{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-shrink:0;min-height:44px}
.brand{display:inline-flex;align-items:center;gap:8px;font-size:18px;font-weight:600;letter-spacing:-.035em;text-decoration:none;color:var(--ink);white-space:nowrap}
.brand-mark{display:block;width:28px;height:28px}.brand-wordmark{display:flex;flex-direction:column;line-height:1.2}.brand-name{font-size:15px;font-weight:600;letter-spacing:-.055em}.brand-wordmark small{font-size:9px;letter-spacing:0;font-weight:400;color:var(--muted);margin-top:2px}
.workspace-nav{display:flex;align-items:center;gap:22px}.nav-link{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);font-size:13px;text-decoration:none}.nav-link:hover{color:var(--accent-ink)}
.new-chat{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:38px;padding:8px 13px;border-radius:8px;background:var(--ink);color:white;font-size:12px;font-weight:500;white-space:nowrap}.new-chat:hover{background:#31383b}.new-chat span{font-size:17px;line-height:1}
.chat{width:100%;max-width:720px;flex:1;min-height:0;display:flex;flex-direction:column;justify-content:safe center;padding:22px 0;overflow-y:auto;scrollbar-width:thin;position:relative}
.conversation{flex:0 0 auto;min-height:0;display:flex;flex-direction:column;overflow:visible}
.welcome{flex-shrink:0;display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px;padding:0}
.welcome #page-title{font-size:36px;font-weight:500;line-height:1.15;letter-spacing:-.04em}
.chat.is-started{padding-top:18px;padding-bottom:6px;justify-content:flex-start;overflow:visible}
.chat.is-started .conversation{flex:1;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;padding:0 4px 10px}
.text-btn{background:transparent;color:var(--muted);padding:8px 0;min-height:44px;font-size:14px}.text-btn:hover,.example-link:hover{color:var(--accent-ink);text-decoration:underline}

.benefit-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:20px;flex-shrink:0}
.benefit{background:var(--wash);border-radius:10px;padding:16px 14px 14px;min-height:136px;display:flex;flex-direction:column;align-items:flex-start}
.benefit h2{font-size:12px;line-height:1.4;font-weight:600;letter-spacing:-.015em}.benefit p{font-size:12px;line-height:1.55;margin-top:6px}.benefit svg{width:18px;height:18px;flex-shrink:0;margin-top:auto;padding-top:0;color:var(--muted)}
.messages{display:flex;flex-direction:column;gap:18px;padding:28px 12px 8px}.messages:empty{display:none}.message{max-width:85%;font-size:15px;white-space:pre-wrap;overflow-wrap:anywhere}.message.assistant{padding-left:28px;position:relative}.message.assistant:before{content:'↗';position:absolute;left:0;color:var(--accent-ink);font-size:21px;top:-3px}.message.user{align-self:flex-end;background:var(--soft);border-radius:12px 12px 2px 12px;padding:12px 16px}
.composer{flex-shrink:0;margin:26px 0 0;border:2px solid var(--accent);border-radius:12px;background:#fff;box-shadow:0 6px 24px #fe58581a}
.drop-overlay{position:absolute;inset:4px 0;z-index:10;pointer-events:none;background:#fff0f0f5;border:2px dashed var(--accent);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:24px;color:var(--ink)}.drop-overlay strong{font-size:20px;font-weight:600;line-height:1.35}.drop-overlay span{font-size:13px;color:var(--muted)}.drop-overlay svg{color:var(--accent-ink)}
.composer:focus-within{box-shadow:0 0 0 4px #fe585829}
textarea{display:block;width:100%;border:0;resize:none;overflow-y:hidden;min-height:88px;max-height:clamp(88px,24dvh,220px);border-radius:12px;padding:18px 18px 12px;background:transparent;font-size:16px;line-height:1.55}textarea:focus-visible{outline:none}textarea::placeholder{color:#828287}
.compose-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 10px 10px}.compose-tools{display:flex;align-items:center;gap:8px;min-width:0}
.attach{position:relative;display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:7px 10px;font-size:12px;cursor:pointer;border:1px solid var(--line);border-radius:7px;overflow:hidden;white-space:nowrap}.attach:hover{background:var(--wash)}.attach:focus-within{outline:3px solid #fe5858}.attach input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.attach svg{flex-shrink:0}

.compose-actions .send-button{padding:0;min-height:36px;width:36px;height:36px;border-radius:8px;flex-shrink:0;color:#fff}.send-button:disabled{opacity:1;background:var(--accent);color:#fff;cursor:not-allowed}
.primary,.secondary{min-height:44px;padding:10px 19px;border-radius:8px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:12px;text-decoration:none}.primary{background:var(--accent);color:var(--on-accent)}.primary:hover{background:#f34b4e}.secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}.secondary:hover{background:var(--wash)}
.terms{flex-shrink:0;display:flex;justify-content:center;gap:8px;padding:10px 0 0;font-size:11px;color:var(--muted);flex-wrap:wrap}.terms strong{color:var(--ink);font-weight:600;white-space:nowrap}
#file-card{max-height:clamp(68px,18dvh,150px);overflow:auto;overscroll-behavior:contain;scrollbar-width:thin}#file-card:empty{display:none}.attachment-notice{font-size:12px;line-height:1.5;color:var(--accent-ink);padding:8px 14px 0;overflow-wrap:anywhere;max-height:80px;overflow:auto}.file-icon{min-width:36px;text-align:center;flex-shrink:0}
.file-pill{margin:12px 12px 0;padding:8px 12px;background:var(--wash);border-radius:8px;display:flex;align-items:center;gap:10px;font-size:13px}.file-icon{color:var(--accent-ink);font-size:11px;font-weight:600;border:1px solid #ffb9bb;border-radius:4px;padding:7px 4px}.file-details{min-width:0;flex:1}.file-details strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-details small{font-size:11px;color:var(--muted)}.icon-btn{height:44px;min-width:44px;border-radius:8px;background:transparent;font-size:25px;line-height:1;flex-shrink:0}.icon-btn:hover{background:var(--wash)}
.state-box{margin:16px 12px 0;padding:14px 16px;border-radius:9px;background:var(--wash);font-size:14px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}.state-box.warning{background:#faf3e7;color:var(--warning)}.state-box small{display:block;color:var(--muted);font-size:12px}.spinner{display:inline-block;width:12px;height:12px;border:2px solid #ffb9bb;border-top-color:var(--accent-ink);border-radius:50%;animation:turn 1.2s linear infinite;margin-right:8px}@keyframes turn{to{transform:rotate(360deg)}}
.result-card{margin:20px 12px 8px;border:1px solid var(--line);border-radius:12px;padding:18px;display:grid;grid-template-columns:100px 1fr;gap:20px}.thumb{background:var(--wash);border:1px solid var(--line);padding:4px;border-radius:6px;align-self:start}.thumb img{display:block;width:100%;height:auto}.result-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:11px;color:var(--accent-ink);margin-bottom:8px}.result-title{font-size:17px;font-weight:600}.result-card p{font-size:13px;margin-top:7px}.result-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}.version{min-height:38px;padding:4px 7px;border:1px solid var(--line);border-radius:6px;background:white;font-size:12px;max-width:180px}.inline-note{font-size:11px!important;color:var(--muted)}
/* Explanations begin below the full-height workspace. */
.below{max-width:1080px;margin:0 auto;padding:72px 32px 0}.example-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;margin:32px 0}.example-grid article{border-top:1px solid var(--line);padding-top:20px}.example-grid p{font-size:14px;margin-top:10px}.example-link{font-size:13px;color:var(--accent-ink);background:none;text-align:left;padding:12px 0;min-height:44px}.limits{font-size:13px}.prototype-note{font-size:12px;margin-top:8px}.faq{max-width:880px}.faq h2{margin-bottom:22px}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;min-height:56px;padding:18px 28px 18px 0;font-size:15px;font-weight:500;list-style:none;position:relative}summary::after{content:'+';position:absolute;right:4px;color:var(--accent-ink)}details[open] summary::after{content:'−'}details p{font-size:14px;line-height:1.8;padding-bottom:20px}summary::-webkit-details-marker{display:none}.lab{max-width:880px;padding-top:40px}.lab summary{font-size:13px;color:var(--muted)}.lab label{font-size:13px;margin-right:12px}.lab select{margin-bottom:20px}.footer{max-width:1016px;margin:60px auto 0;padding:24px 0;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.small-brand{font-size:15px}
/* Comparison and checkout keep the same interaction model. */
dialog{border:1px solid var(--line);border-radius:16px;padding:28px;max-width:480px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 24px 100px #171d2030}dialog::backdrop{background:#171d2080;backdrop-filter:blur(3px)}dialog p{font-size:14px;margin:12px 0}dialog h2{font-size:23px}.dialog-top{display:flex;gap:16px;justify-content:space-between;align-items:center}.receipt{display:flex;justify-content:space-between;gap:16px;align-items:center;background:var(--wash);padding:15px;margin:20px 0;border-radius:9px;font-size:13px}.receipt strong{font-size:26px;font-weight:600;white-space:nowrap;flex-shrink:0}#payment-form>label{display:block;font-size:13px;margin-bottom:6px}input[type=email]{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px;min-height:48px;font-size:16px}.hint{font-size:12px!important;color:var(--muted);margin:7px 0 16px!important}fieldset{border:0;padding:0;margin:20px 0}legend{font-size:13px;margin-bottom:10px}.payment-choice{display:flex;flex-wrap:wrap;align-items:center;gap:8px;border:1px solid var(--line);padding:13px;border-radius:8px;margin:8px 0;font-size:14px}.payment-choice input{accent-color:var(--accent-ink)}.payment-choice span{width:100%;font-size:12px;color:var(--muted);padding-left:26px}.full{width:100%}#pay-error,#notify-error{color:#9d3528}#notify-form>label{display:block;font-size:13px;margin-bottom:6px}.big-doc{margin-top:8px}.button-row{display:flex;justify-content:flex-end;gap:12px;margin-top:22px}
#viewer{width:calc(100% - 48px);max-width:1050px;height:calc(100dvh - 40px);max-height:none;padding:0;overflow:hidden}#viewer[open]{display:flex;flex-direction:column}.viewer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;gap:16px}.viewer-head h2{font-size:18px;margin-top:2px}.eyebrow{font-size:10px;color:var(--muted)}.viewer-tools{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:10px 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.segmented{display:flex;background:var(--wash);border-radius:8px;padding:3px}.segmented button{background:transparent;font-size:13px;min-height:38px;padding:5px 14px;border-radius:6px}.segmented button[aria-pressed=true]{background:var(--accent);color:var(--on-accent)}select{min-height:38px;border:1px solid var(--line);border-radius:6px;background:white;padding:5px 8px;font-size:14px}.page-picker,.zoom-picker{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:7px}.viewer-caption{padding:8px 24px;margin:0;font-size:12px;background:white}.paper-wrap{flex:1;min-height:0;overflow:auto;background:#ededee;padding:24px;text-align:center;overscroll-behavior:contain}.paper-wrap img{display:block;width:100%;max-width:794px;height:auto;margin:0 auto;box-shadow:0 1px 8px #171d2015}.viewer-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 24px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.viewer-foot .primary{font-size:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:absolute;top:-100px;left:16px;background:white;padding:12px;z-index:100}.skip:focus{top:8px}.noscript{padding:24px}
.demo-bar{text-align:center;background:var(--wash);border-bottom:1px solid var(--line);font-size:12px;padding:5px 12px;color:var(--muted)}.bank-shell{max-width:540px;margin:50px auto;padding:28px;background:white;border:1px solid var(--line);border-radius:16px}.bank-logo{font-size:12px;color:var(--accent-ink);margin-bottom:16px}.bank-shell h1{font-size:25px}.bank-shell p{font-size:14px;margin:18px 0}.qr-demo{width:176px;height:176px;display:grid;place-items:center;background:var(--wash);border:2px dashed #ffb9bb;border-radius:10px;margin:24px auto;color:var(--accent-ink);font-weight:600;font-size:19px}.bank-buttons{display:grid;gap:12px}.bank-shell .total{font-size:32px;color:var(--ink);margin:10px 0}.bank-back{display:block;text-align:center;padding:15px;font-size:13px}
@media(max-width:800px){.workspace{padding:16px 24px 12px}.workspace-nav{gap:18px}.below{padding-top:56px}.example-grid{gap:22px}.footer{margin-left:32px;margin-right:32px}.viewer-tools{gap:10px}.viewer-foot span{max-width:40%}}
@media(max-width:520px){
 .workspace{padding:12px 16px max(10px,env(safe-area-inset-bottom))}.workspace-brand{gap:10px;min-height:40px}.brand{gap:5px}.brand-mark{width:24px;height:24px}.brand-name{font-size:14px}.brand-wordmark small{font-size:8px}.workspace-nav{gap:12px}.nav-link{font-size:11px}.new-chat{font-size:11px;min-height:36px;padding:7px 9px}.new-chat span{font-size:16px}
 .chat{padding:20px 0}.welcome{gap:10px}.welcome #page-title{font-size:29px}.chat.is-started{padding:12px 0 4px}.chat.is-started .conversation{padding:0 0 6px}.messages{padding:12px 0 4px;gap:14px}.message{font-size:13px;max-width:94%}.message.assistant{padding-left:24px}.message.user{padding:10px 13px}
 .composer{margin:22px 0 0}textarea{padding:14px;min-height:82px;max-height:clamp(82px,24dvh,180px);font-size:16px}.compose-actions{padding:0 8px 8px;gap:8px}.compose-tools{gap:3px}.attach{font-size:11px;padding:7px}.primary,.secondary{padding:10px 13px;font-size:12px}.terms{padding:10px 0 0;font-size:10px;gap:3px 8px}.file-pill{padding:7px;margin:8px 8px 0;gap:7px}.file-icon{font-size:9px}.file-details strong{font-size:11px}.file-details small{font-size:10px}
 .benefit-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:18px}.benefit{padding:12px;min-height:116px}.benefit h2{font-size:11px}.benefit p{font-size:11px;line-height:1.5;margin-top:4px}.benefit svg{width:16px;height:16px}
 .state-box{margin:12px 0 0;padding:12px;font-size:13px;gap:8px}.result-card{margin:14px 0 8px;padding:12px;grid-template-columns:56px 1fr;gap:10px}.result-meta{flex-wrap:wrap;gap:5px;font-size:10px}.result-title{font-size:13px}.result-card p{font-size:12px}.result-actions{grid-column:1/-1;gap:8px}.result-actions button,.result-actions a{flex:1}.result-main .result-actions{display:none}.result-card .version{font-size:10px;min-height:35px;max-width:155px}.result-card .inline-note{font-size:10px!important}
 .below{padding:44px 20px 0}.below h2{font-size:24px}.example-grid{grid-template-columns:1fr;gap:16px;margin:24px 0}.example-grid article{padding-top:16px}.example-grid p{margin-top:8px}.limits{font-size:12px}.prototype-note{font-size:11px}.faq h2{margin-bottom:18px}summary{font-size:14px;line-height:1.6}.faq details p{font-size:13px}.footer{padding:20px 0;gap:12px;flex-wrap:wrap;margin:40px 20px 0}.footer>span:nth-child(2){margin-left:auto}.footer a{width:100%}.lab{padding-top:24px}.lab label{display:block;margin:8px 0}.lab select{max-width:100%;width:100%}
 dialog{padding:20px;border-radius:12px;width:calc(100% - 24px);max-height:calc(100dvh - 24px)}dialog h2{font-size:20px}.dialog-top{gap:4px}#viewer{width:100%;height:100dvh;margin:0;max-width:none;border:0;border-radius:0}.viewer-head{padding:10px 12px}.viewer-head h2{font-size:16px}.viewer-tools{padding:8px 12px;gap:8px}.segmented{width:100%}.segmented button{flex:1}.page-picker,.zoom-picker{font-size:10px;gap:5px}.page-picker select,.zoom-picker select{font-size:12px;min-height:36px;max-width:110px}.viewer-caption{padding:7px 12px;font-size:11px}.paper-wrap{padding:12px}.viewer-foot{padding:10px 12px;flex-wrap:wrap;gap:8px}.viewer-foot span{max-width:none;width:100%;font-size:10px}.viewer-foot button{width:100%}.bank-shell{margin:24px 12px;padding:24px}.bank-shell h1{font-size:23px}
}
@media(min-width:521px){.mobile-actions{display:none!important}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.spinner{animation:none}}

@media(max-height:650px){.chat{padding:12px 0}.welcome{gap:7px}.welcome #page-title{font-size:28px}.composer{margin-top:18px}.benefit-grid{margin-top:14px}.benefit{min-height:116px}.chat.is-started{padding:8px 0 4px}}

/* Pending attachments belong to the draft below its text, until Send. */
#file-card:not(:empty){display:flex;flex-wrap:nowrap;gap:8px;padding:0 12px 8px;max-height:none;overflow-x:auto;overflow-y:hidden;overscroll-behavior-x:contain;scroll-snap-type:x proximity;scroll-padding-inline:12px}
#file-card .file-pill{flex:0 0 104px;max-width:calc(100% - 24px);height:48px;min-width:0;margin:0;padding:4px 2px 4px 8px;gap:2px;scroll-snap-align:start}
#file-card .file-icon{display:none}
#file-card .file-details strong{font-size:11px;line-height:1.4}
#file-card .file-details small{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:10px;line-height:1.4}
.remove-attachment{font-size:19px;color:var(--muted);min-width:24px;height:40px}
.remove-attachment:disabled{opacity:.4;cursor:wait}
.file-error{background:#fff0f0}.file-error .file-details small{color:#a12a32}
.attachment-notice{padding:0 14px 10px;margin:0}
.composer[aria-busy=true] .attach{opacity:.55;cursor:wait}
.send-button.is-sending svg{display:none}
.send-button.is-sending::after{content:"";width:16px;height:16px;border:2px solid #ffffff70;border-top-color:#fff;border-radius:50%;animation:turn .8s linear infinite}