:root{color-scheme:light;--bg:#f7f9fb;--paper:#fff;--ink:#20374c;--muted:#536779;--line:#dce4ec;--blue:#315c79;--soft:#e8eff5;--accent:#d48b51;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font-size:14px}button,textarea{font:inherit}button,a,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #6195bc;outline-offset:4px}a{color:var(--blue)}button{border:0;background:none}button:disabled{opacity:.5;cursor:default}a{touch-action:manipulation}.header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 40px;border-bottom:1px solid var(--line);background:var(--bg)}.brand{display:flex;align-items:baseline;gap:18px;color:var(--ink);text-decoration:none}.brand strong{font-size:23px;letter-spacing:-1px}.brand span{font-size:13px;letter-spacing:.1em;padding-left:18px;border-left:1px solid #b4c2cc}.header-actions{display:flex;align-items:center;gap:24px}.demo-label{font-size:11px;letter-spacing:.08em;color:var(--muted)}.text-button{padding:8px 0;font-size:12px}.share-button{border:1px solid #bccbd7;border-radius:7px;padding:9px 14px;font-size:12px;background:var(--paper)}.share-button:hover,.starter-list button:hover{border-color:var(--blue);background:#f0f5f9}.demo-notice{height:38px;display:flex;align-items:center;justify-content:center;gap:8px;border-bottom:1px solid var(--line);background:#eef3f7}.demo-notice p{margin:0;font-size:11px;color:#415b70}.notice-dot,.status-dot{width:5px;height:5px;border-radius:50%;background:#7398ac;display:inline-block;flex:none}.workspace{display:grid;grid-template-columns:254px 1fr;height:calc(100dvh - 116px);min-height:480px}.sidebar{border-right:1px solid var(--line);padding:29px 22px 20px;display:flex;flex-direction:column;overflow-y:auto}.new-chat{background:var(--paper);border:1px solid #cad7e2;border-radius:8px;padding:12px 17px;text-align:left;font-size:13px;margin-bottom:24px}.new-chat span{font-size:18px;margin-right:6px}.nav-label{font-size:10px;letter-spacing:.08em;color:var(--muted);margin:14px 0 10px}.scenario{display:flex;gap:10px;align-items:baseline;text-align:left;padding:14px 0;font-size:12px;border-bottom:1px solid #e2e8ee;line-height:1.6}.scenario:hover{color:var(--blue)}.scenario-number{font-size:10px;color:#8b6748;font-variant-numeric:tabular-nums}.scenario small{font-size:10px;color:var(--muted);display:block;margin-top:3px}.history-heading{display:flex;align-items:center;justify-content:space-between;margin-top:22px}.small{font-size:10px}#history{padding-bottom:25px}.history-item{display:block;width:100%;font-size:11px;text-align:left;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;padding:10px 8px;border-radius:5px}.history-item[aria-current=true]{background:var(--soft)}.history-item:hover{background:var(--soft)}.empty-history{font-size:10px;color:var(--muted);line-height:1.8}.sidebar-bottom{margin-top:auto;font-size:10px;color:var(--muted);line-height:2}.sidebar-bottom .text-button{display:block;font-size:11px}.sidebar-bottom .status-dot{margin-right:6px}.chat{min-height:0;min-width:0;display:flex;flex-direction:column;position:relative}.chat-scroll{flex:1;min-height:0;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#b0bdc8 transparent;scroll-padding:24px}.welcome{width:min(690px,100%);margin:0 auto;padding:37px 30px 26px}.welcome-editor{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--muted)}.welcome-editor img{object-fit:contain;width:100px;height:100px;animation:float 4.5s ease-in-out infinite;filter:drop-shadow(0 9px 9px #1f374811)}.eyebrow{font-size:10px;color:#6f5b43;letter-spacing:.15em;font-weight:600}.welcome .eyebrow{margin:18px 0 13px}h1{font-size:clamp(28px,3vw,39px);line-height:1.6;letter-spacing:.04em;font-weight:600;margin:0}.intro{font-size:13px;line-height:2;color:var(--muted);margin:15px 0 24px}.starter-list{display:grid;gap:9px}.starter-list button{border:1px solid #d3dee8;background:#fff9;border-radius:8px;padding:15px 17px;font-size:12px;display:flex;justify-content:space-between;gap:16px;text-align:left;line-height:1.5;transition:background .15s}.starter-list button>span:last-child{color:#68849a}#messages{width:min(800px,100%);margin:auto;padding:26px 40px}.exchange{margin-bottom:28px}.user-row{display:flex;justify-content:flex-end;margin:0 0 24px}.user-message{max-width:90%;background:var(--soft);border-radius:19px 19px 3px 19px;padding:14px 18px;font-size:13px;line-height:1.8;margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.answer-label{display:flex;align-items:center;gap:12px;font-size:11px;font-weight:600;margin-bottom:12px}.answer-label img{width:39px;height:44px;object-fit:contain}.answer-body{font-size:14px;line-height:2;overflow-wrap:anywhere}.answer-body p{margin:0 0 14px;white-space:pre-wrap}.answer-note{font-size:10px;color:var(--muted);margin:14px 0;line-height:1.8}.followups{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.followups button{font-size:11px;border:1px solid #ccd9e4;border-radius:20px;padding:9px 13px;background:var(--paper)}.followups button:hover{background:var(--soft)}.articles{margin:24px 0 5px}.articles h2{font-size:13px;line-height:1.8;margin:0 0 12px}.article-card{border-top:1px solid var(--line);padding:15px 0}.article-card:last-of-type{border-bottom:1px solid var(--line)}.article-date{font-size:10px;color:var(--muted);margin:0 0 6px}.article-title{color:var(--blue);font-weight:600;line-height:1.9;font-size:13px;text-decoration:none}.article-title:hover{text-decoration:underline}.article-reason{font-size:11px;line-height:1.9;color:var(--muted);margin:7px 0 0}.quiz-options{display:grid;gap:7px;margin:13px 0}.quiz-options button{padding:12px 15px;border:1px solid var(--line);background:var(--paper);border-radius:7px;text-align:left;font-size:12px}.quiz-options button:hover{border-color:var(--blue)}.composer-wrap{position:relative;width:min(800px,100%);margin:0 auto;padding:15px 40px 17px;flex:none;background:var(--bg)}.companion{position:absolute;right:2px;top:-78px;display:flex;flex-direction:column;align-items:center;pointer-events:none}.companion img{width:73px;height:80px;object-fit:contain;animation:float 4.5s ease-in-out infinite}.companion span{font-size:8px}#composer{display:flex;align-items:flex-end;gap:8px;border:1px solid #b9cddd;background:#fff;border-radius:19px;padding:15px;box-shadow:0 6px 25px #20374c04}textarea{resize:none;border:0;outline:none;background:transparent;color:var(--ink);width:100%;font-size:14px;line-height:1.8;min-height:47px;max-height:100px}textarea::placeholder{color:#63798b}#send{display:flex;align-items:center;gap:10px;flex:none;background:var(--blue);color:#fff;padding:12px 15px;border-radius:12px;font-size:12px;min-height:43px}.composer-meta{display:flex;justify-content:space-between;gap:16px;font-size:10px;color:var(--muted);margin-top:11px}.composer-meta a{text-decoration:none;font-size:10px}.composer-note{font-size:9px;line-height:1.8;color:var(--muted);margin:10px 0 0;text-align:center}dialog{border:1px solid #d5e0e9;border-radius:14px;max-width:590px;width:calc(100% - 32px);max-height:calc(100dvh - 48px);padding:28px 36px 34px;color:var(--ink);box-shadow:0 20px 90px #20374c24;background:#fcfdff}dialog::backdrop{background:#17304455;backdrop-filter:blur(3px)}.dialog-top{display:flex;align-items:center;justify-content:space-between}.close{font-size:28px;line-height:1;width:40px;height:40px}.dialog-top .eyebrow{font-size:9px}dialog h2{font-size:28px;line-height:1.55;font-weight:600;margin:12px 0 20px}dialog>p{font-size:12px;line-height:2}dialog h3{font-size:13px;margin:24px 0 12px}.brief{margin:24px 0}.brief>div{display:grid;grid-template-columns:100px 1fr;border-top:1px solid var(--line);padding:13px 0;font-size:12px;line-height:1.8}.brief dt{color:var(--muted);font-size:11px}.brief dd{margin:0}.brief dd strong{font-size:23px;letter-spacing:.01em}.brief dd small{display:block;font-size:10px;color:var(--muted)}.journey{list-style:none;padding:0;margin:0}.journey li{display:grid;grid-template-columns:80px 1fr;font-size:12px;line-height:1.9;margin:12px 0}.journey b{font-size:11px}.dialog-note{font-size:10px!important;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin:23px 0}.primary-button{background:var(--blue);color:white;border-radius:8px;padding:13px 20px;font-size:12px}.scope-row{display:flex;gap:14px;border-top:1px solid var(--line);padding:18px 0}.scope-mark{flex:none;border:1px solid #bdcdd9;border-radius:3px;height:23px;padding:3px 8px;font-size:10px;color:#315b72}.scope-mark.planned{color:var(--muted);background:#edf1f4;border-color:#edf1f4}.scope-row h3{margin:0 0 5px;font-size:12px}.scope-row p{font-size:11px;line-height:1.9;color:var(--muted);margin:0}.dialog-buttons{display:flex;justify-content:flex-end;gap:25px;margin-top:25px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);border-radius:8px;background:var(--ink);color:#fff;padding:12px 20px;font-size:12px;max-width:90%;text-align:center;z-index:10;opacity:0;pointer-events:none}#toast.visible{opacity:1}.skip{position:fixed;top:-100px;left:15px;background:#fff;padding:10px;z-index:20}.skip:focus{top:8px}.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}[hidden]{display:none!important}@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}@media(min-width:1400px){.welcome{padding-top:52px}}@media(max-width:1050px){.workspace{grid-template-columns:216px 1fr}.sidebar{padding:24px 16px}.companion{right:18px;top:-74px}.companion img{width:61px;height:67px}#messages{padding-right:32px;padding-left:32px}.composer-wrap{padding-right:32px;padding-left:32px}.welcome{padding-top:24px}.welcome-editor img{width:80px;height:80px}}@media(max-width:760px){.header{height:64px;padding:0 20px}.brand{gap:10px}.brand strong{font-size:20px}.brand span{font-size:11px;padding-left:10px}.header-actions{gap:15px}.share-button{display:none}.demo-label{font-size:9px}.header .text-button{font-size:10px}.demo-notice{height:43px;padding:0 18px;justify-content:flex-start}.demo-notice p{font-size:9px;line-height:1.7}.workspace{display:block;height:calc(100dvh - 107px);min-height:0}.sidebar{display:none}.chat{height:100%}.welcome{padding:22px 24px 25px}.welcome-editor img{width:69px;height:69px}.welcome-editor{font-size:10px;gap:5px}.welcome .eyebrow{font-size:9px;margin:14px 0 9px}h1{font-size:28px;line-height:1.5;letter-spacing:.03em}.intro{font-size:11px;line-height:1.9;margin:13px 0 19px}.desktop-break{display:none}.starter-list button{font-size:11px;padding:13px 14px}#messages{padding:22px 22px 28px}.user-message{font-size:12px;padding:12px 15px}.answer-body{font-size:13px;line-height:2}.answer-label{margin-bottom:10px}.composer-wrap{padding:12px 16px 13px}.companion{right:25px;top:-63px}.companion img{width:54px;height:59px}.companion span{font-size:7px}#composer{padding:13px;border-radius:17px}textarea{font-size:16px;line-height:1.6;min-height:43px}#send{padding:10px 13px;min-height:41px}#send>span:first-child{display:none}.keyboard-help{visibility:hidden}.composer-meta{margin-top:8px}.composer-note{font-size:8px;margin-top:7px;line-height:1.8}.article-title{font-size:12px}.article-reason{font-size:10px}.exchange{margin-bottom:24px}dialog{padding:20px 23px 26px}dialog h2{font-size:25px}.brief>div{grid-template-columns:86px 1fr}.journey li{grid-template-columns:70px 1fr}.followups button{font-size:10px;padding:9px 11px}}@media(max-width:380px){.header{padding:0 15px}.header-actions{gap:10px}.brand span{display:none}.welcome{padding-left:20px;padding-right:20px}h1{font-size:26px}.welcome-editor{display:none}.starter-list button{font-size:10px}.intro{font-size:10px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}

.mobile-new{display:none}@media(max-width:760px){.mobile-new{display:block;padding:4px;font-size:23px;line-height:1}.header-actions{gap:10px}}

/* 2026-10-13: learning content takes priority over the guide character. */
.welcome-editor img{width:52px;height:58px;filter:none}
.answer-label img{width:29px;height:33px}
.answer-label{font-weight:500;color:var(--muted)}
.companion{top:-55px;right:15px}
.companion img{width:48px;height:53px}
@media(max-width:1050px){.welcome-editor img{width:48px;height:54px}.companion{top:-51px;right:28px}.companion img{width:44px;height:49px}}
@media(max-width:760px){.welcome-editor img{width:40px;height:45px}.welcome-editor{font-size:10px;gap:8px}.companion{top:-43px;right:28px}.companion img{width:36px;height:41px}.brand span{font-size:10px}.header-actions{gap:8px}.demo-label{font-size:8px}}