:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;color:#25282d;background:#fff;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,textarea,select{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer;border:1px solid #e2e4e8;border-radius:10px;background:white;color:#30343b;padding:9px 13px}button:hover:not(:disabled){background:#f3f4f6}button:disabled{opacity:.5;cursor:not-allowed}a:focus-visible,button:focus-visible,textarea:focus-visible,summary:focus-visible,select:focus-visible{outline:2px solid #64748b;outline-offset:3px}[hidden]{display:none!important}.chat-header{height:74px;display:flex;align-items:center;gap:28px;padding:0 28px;border-bottom:1px solid #e9ebee;background:#fff}.brand{display:flex;gap:11px;align-items:center;margin-right:auto}.brand b{font-size:17px}.brand small{display:block;color:#79808a;font-size:11px;letter-spacing:1px;margin-top:3px}.chat-header>a:not(.brand){font-size:13px;color:#69717c}.chat-shell{display:grid;grid-template-columns:208px minmax(0,1fr);height:calc(100dvh - 74px);min-height:500px}.chat-nav{padding:20px 14px;background:#fafbfc;border-right:1px solid #e9ebee;overflow:auto;display:flex;flex-direction:column;gap:14px}.chat-nav summary{padding:8px 10px;font-size:12px;color:#69717c;font-weight:600;cursor:pointer}.chat-nav nav{display:grid;gap:3px}.chat-nav nav a{padding:10px 14px;border-radius:9px;font-size:13px}.chat-nav nav a:hover{background:#f0f2f5}.chat-nav a[aria-current]{background:#e9edf3;color:#27384d;font-weight:600}.history-heading{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #e4e7eb;padding-top:16px}.history-heading h2{margin:0 10px;font-size:12px;color:#69717c}.history-heading button{padding:6px 9px;font-size:12px}.conversation-list{display:grid;gap:5px}.conversation-list button{font-size:12px;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border:0;background:transparent}.conversation-list button[aria-current]{background:#e9edf3}.nav-bottom{font-size:12px;color:#77818e;padding:16px 10px;margin-top:auto}.chat-main{display:flex;flex-direction:column;min-height:0;min-width:0;max-width:1160px;width:100%;margin:auto;height:100%;padding:28px 40px 20px}.chat-title{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px}.eyebrow{font-size:11px;letter-spacing:1px;color:#8b939e;margin:0 0 5px}.chat-title h1{font-size:23px;margin:0;font-weight:650}.chat-title>span{font-size:12px;color:#7b8490}.messages{flex:1;min-height:0;overflow-y:auto;scroll-behavior:smooth;padding:20px 4px;scrollbar-gutter:stable}.chat-welcome{padding:clamp(20px,5vh,60px) 0;max-width:770px;margin:auto}.welcome-mark{display:block;font-size:38px;color:#758292;margin-bottom:18px}.chat-welcome h2{font-size:28px;letter-spacing:-.5px;margin:0 0 12px}.chat-welcome>p{color:#7a838e;font-size:14px;line-height:1.9}.starters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:28px}.starters button{text-align:left;padding:18px 14px;line-height:1.8}.starters b{display:block;font-size:13px;font-weight:600}.starters span{display:block;font-size:11px;color:#828b96}.message{max-width:820px;margin:0 auto 24px;line-height:1.85;font-size:14px;overflow-wrap:anywhere}.message-label{display:flex;align-items:center;gap:10px;color:#7b8490;font-size:11px;margin-bottom:7px}.message-label strong{font-size:12px;color:#454e5a}.message-text{white-space:pre-wrap}.message.user .message-text{padding:13px 18px;background:#f4f6f8;border-radius:13px;width:fit-content;max-width:100%;margin-left:auto}.message.user .message-label{justify-content:flex-end}.message.assistant .message-text{padding:0 1px}.message .copy-answer{font-size:11px;padding:3px 8px;margin-top:9px;color:#69717c}.message-state{font-size:12px;color:#7e8792;margin:8px 0}.composer-wrap{padding-top:8px}.composer{border:1px solid #dfe3e9;border-radius:17px;padding:15px;background:white;box-shadow:0 4px 20px #1f293705}.composer:focus-within{border-color:#aab4c2}.composer textarea{display:block;width:100%;resize:vertical;min-height:64px;max-height:200px;outline:none;border:0;color:#303741;background:transparent;font-size:14px;line-height:1.8;padding:0 2px}.composer textarea::placeholder{color:#939aa5}.composer-bottom{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:15px}.platform-field{display:flex;align-items:center;gap:6px}.platform-field label{font-size:11px;color:#8a939e}.composer select{height:36px;max-width:160px;font-size:12px}.send-group{margin-left:auto;display:flex;gap:8px}.send-group #send{background:#272b31;color:white;border-color:#272b31;min-width:86px}.send-group #send:hover:not(:disabled){background:#414751}.word-count{font-size:11px;color:#9aa2ac}.composer-help{font-size:12px;color:#747f8b;line-height:1.6;margin:11px 2px 6px}.billing-note{font-size:10px;color:#9098a3;margin:0 2px;line-height:1.8}.billing-note a{text-decoration:underline;text-underline-offset:3px}.billing-note>span{float:right}.chat-notice{font-size:12px;line-height:1.7;margin:0 0 10px;color:#657181}.chat-notice.error{color:#a54136}.recovery-actions{display:flex;gap:8px;margin-bottom:12px}.recovery-actions button{font-size:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:1050px){.chat-main{padding:24px}.chat-shell{grid-template-columns:178px minmax(0,1fr)}.starters{grid-template-columns:1fr}.starters button{padding:10px 14px}.starters span{display:none}.chat-welcome{padding:15px 0}.word-count{display:none}}
@media(max-width:700px){.chat-header{height:64px;padding:0 14px;gap:15px}.chat-header>a:not(.brand){font-size:12px}.chat-header>a[href="/workspace"]{display:none}.brand small{font-size:9px}.brand img{width:27px;height:27px}.brand b{font-size:15px}.chat-shell{display:flex;flex-direction:column;height:calc(100dvh - 64px);min-height:550px}.chat-nav{flex:none;flex-direction:row;align-items:center;gap:4px;padding:5px 12px;border-right:0;border-bottom:1px solid #e9ebee;overflow:visible;position:relative}.chat-nav>details{display:none}.chat-nav .history-heading{border:0;padding:0;gap:12px}.chat-nav .history-heading h2{font-size:11px;margin:0}.chat-nav .history-heading button{min-height:44px}.conversation-list{display:flex;overflow-x:auto;max-width:calc(100% - 133px)}.conversation-list button{max-width:150px;flex:none;min-height:44px}.nav-bottom{display:none}.chat-main{padding:18px 14px 12px}.chat-title h1{font-size:20px}.eyebrow{font-size:10px}.messages{padding:10px 0}.chat-welcome h2{font-size:23px}.chat-welcome>p{font-size:12px}.welcome-mark{font-size:29px;margin-bottom:12px}.starters{margin-top:18px;gap:8px}.starters button{min-height:44px}.composer{padding:12px;border-radius:13px}.composer textarea{font-size:16px}.composer-bottom{gap:8px;margin-top:10px}.platform-field{flex:1;gap:6px}.platform-field label{display:none}.composer select{font-size:16px;min-height:44px;max-width:150px}.send-group{margin:0;gap:6px}.send-group #send{min-width:60px;font-size:14px;padding:8px 10px;min-height:44px}.billing-note>span{display:none}.composer-help{font-size:11px}.chat-welcome{padding:6px 0}.message{font-size:14px}.message .copy-answer{min-height:44px}}
@media(max-width:390px){.platform-field{width:100%;flex-basis:100%}.platform-field label{display:block}.send-group{width:100%;justify-content:flex-end}.send-group select{margin-right:auto}.chat-title>span{max-width:120px;text-align:right;font-size:10px}.chat-header{gap:10px}.brand small{letter-spacing:0}}
@media(prefers-reduced-motion:reduce){.messages{scroll-behavior:auto}}
@media(max-width:700px){.recovery-actions{flex-wrap:wrap}.recovery-actions button{min-height:44px;font-size:14px}}
.guide-page{max-width:1050px;margin:0 auto;padding:64px 32px}.guide-page h1{font-size:38px;line-height:1.3;letter-spacing:-1px}.guide-intro{color:#7a838e;line-height:1.9}.guide-index{display:flex;flex-wrap:wrap;gap:12px 24px;padding:25px 0 35px;border-bottom:1px solid #e7eaee;color:#657282;font-size:13px}.guide-page section{position:relative;padding:38px 0 38px 54px;border-bottom:1px solid #e7eaee;scroll-margin-top:20px}.guide-page section h2{font-size:23px;margin:0 0 20px}.guide-page section p,.guide-page li{font-size:14px;line-height:1.95;color:#687380;max-width:850px}.guide-page li{margin-bottom:9px}.guide-page section>a{font-size:13px;display:inline-block;padding:12px 0;margin-right:20px;text-decoration:underline;text-underline-offset:5px}.guide-number{position:absolute;left:0;top:43px;color:#a0a8b3;font-size:12px}.guide-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.guide-cards h3{font-size:16px}.guide-cards a{font-size:13px;text-decoration:underline}.guide-page footer{padding-top:40px;color:#87909d;font-size:12px}@media(max-width:700px){.guide-page{padding:36px 20px}.guide-page h1{font-size:27px}.guide-page section{padding:30px 0 30px 26px}.guide-page section h2{font-size:20px}.guide-number{top:34px;font-size:10px}.guide-cards{grid-template-columns:1fr;gap:12px}.guide-index a{min-height:32px}.guide-page li,.guide-page section p{font-size:14px}.guide-page ol,.guide-page ul{padding-left:20px}}

@media(min-width:701px) and (max-height:850px){.chat-welcome{padding:8px 0}.welcome-mark{font-size:26px;margin-bottom:8px}.chat-welcome h2{font-size:25px;margin-bottom:8px}.chat-welcome>p{margin:8px 0;font-size:13px}.starters{margin-top:16px}.starters button{padding:11px 12px}}

.history-error{font-size:12px;line-height:1.6;padding:0 10px;color:#6b6b6b}.history-error p{margin:0 0 8px}.history-error button{font-size:12px;min-height:44px}.chat-discard{width:min(440px,calc(100% - 32px));max-height:calc(100dvh - 32px);overflow:auto;border:1px solid #e4e4e7;border-radius:16px;background:#fff;color:#242424;padding:24px}.chat-discard::backdrop{background:#0005}.chat-discard h2{font-size:20px;margin:0 0 12px}.chat-discard p{font-size:14px;line-height:1.8;color:#6b6b6b}.chat-discard-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px;margin-top:24px}.chat-discard-actions button{min-height:44px}.chat-discard-actions button:first-child{background:#242424;color:#fff;border-color:#242424}@media(max-width:700px){.history-error{flex:1;min-width:0}.history-error button{font-size:14px}.chat-discard{padding:20px}.chat-discard-actions{display:grid;grid-template-columns:1fr}.chat-discard-actions button{width:100%}}

/* Legacy archive grouping keeps mobile history controls readable. */
.legacy-history-group{min-width:0}.legacy-history-group>summary{font-size:12px;font-weight:600;color:#69717c;cursor:pointer;padding:10px 0}.legacy-history-group .history-heading{padding-top:4px}.legacy-history-group .history-heading h2{white-space:nowrap}.legacy-history-group .conversation-list{max-width:none}.legacy-history-group .message-state{line-height:1.6}
@media(max-width:700px){.chat-nav{flex-wrap:wrap}.chat-nav>.history-heading{flex:none}.chat-nav>.history-heading h2{white-space:nowrap}.chat-nav>.conversation-list{flex:1;min-width:0;max-width:none}.chat-nav>details.legacy-history-group{display:block;flex-basis:100%;width:100%}.legacy-history-group>summary{min-height:44px;padding:12px 0}.legacy-history-group .history-heading{justify-content:flex-start;gap:12px}.legacy-history-group .conversation-list{display:flex;max-width:100%;overflow:auto}.legacy-history-group #legacy-list-more{min-height:44px}.legacy-history-group .message-state{margin:4px 0}}

/* October 13 usability improvements */
.chat-main{padding:18px 28px 12px}.composer{padding:10px 12px}.composer textarea{height:38px;min-height:38px;max-height:132px;resize:none;overflow-y:auto}.composer-bottom{margin-top:7px;gap:8px}.composer-help{margin:5px 2px;font-size:11px}.messages{scroll-behavior:auto}.starters{grid-template-columns:repeat(2,minmax(0,1fr))}.billing-note{font-size:11px}.shared-chat-history{margin-top:8px;border:0;min-height:120px}.shared-chat-history .conversation-list{max-height:150px;overflow-y:auto}.shared-chat-history .history-heading{padding-top:14px}.shared-chat-history .conversation-list button{width:100%;min-height:38px}.workspace-nav-collapsed .shared-chat-history{display:none}@media(max-width:979px){.shared-chat-history{padding:8px}.shared-chat-history .conversation-list{display:grid;max-width:none;overflow:auto}.chat-main{padding:12px 14px}}@media(max-width:420px){.composer-bottom{gap:5px}.composer select{max-width:120px;font-size:13px}.send-group{width:100%;justify-content:flex-end}.platform-field{flex:1}.word-count{margin-left:auto}}

.history-search{display:grid;gap:6px;font-size:11px;color:#69717c;margin:10px 0 4px}.history-search input{width:100%;min-width:0;height:36px;border:1px solid #dfe3e9;border-radius:8px;padding:6px 9px;background:#fff;font:inherit;color:#30343b}.history-local-note{font-size:10px;line-height:1.6;color:#7e8792;margin:4px 0}.chat-heading-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.chat-heading-actions button{padding:5px 9px;font-size:12px}.message-bill{font-size:12px;color:#69717c;margin-top:8px}.message-bill summary{cursor:pointer;min-height:32px;display:list-item}.message-bill dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:8px 0}.message-bill dl>div{display:flex;gap:8px;flex-wrap:wrap}.message-bill dt{color:#7e8792}.message-bill dd{margin:0;color:#30343b}.shared-chat-history .conversation-list button[hidden]{display:none!important}
@media(max-width:979px){.shared-chat-history .history-search input{min-height:44px;font-size:16px}.chat-heading-actions button{min-height:44px}.chat-shell{min-height:0}.chat-main{min-height:0}.message-bill summary{min-height:44px;padding:10px 0}.composer-wrap{padding-bottom:env(safe-area-inset-bottom)}}
@media(max-height:600px){.chat-shell{min-height:0}.chat-title{padding-bottom:4px}.chat-welcome{padding:0}.composer-help,.billing-note{font-size:10px}.composer-wrap{padding-top:4px}.composer{padding:7px 10px}.chat-main{padding-top:8px}}