:root{--bg:#f4f5f0;--surface:#fff;--text:#172b29;--muted:#52665f;--border:#d9e2dc;--accent:#236b59;--tint:#edf4ec;--danger:#ad3446;--track:#edf1eb;--thumb:#a0b4a9;--thumb-hover:#739183;--radius:10px;--sidebar:272px;--sidebar-bg:#112c28;--brand-highlight:#d6ef9a;--sidebar-text:#e4ede6;--sidebar-muted:#a7c0b5;font-family:system-ui,"Segoe UI",sans-serif;color:var(--text);font-size:16px;line-height:1.6;scrollbar-color:var(--thumb) var(--track);scrollbar-width:thin}
*{box-sizing:border-box;scrollbar-color:var(--thumb) var(--track);scrollbar-width:thin}*::-webkit-scrollbar{width:9px;height:9px}*::-webkit-scrollbar-track{background:var(--track)}*::-webkit-scrollbar-thumb{background:var(--thumb);border:2px solid var(--track);border-radius:6px}*::-webkit-scrollbar-thumb:hover{background:var(--thumb-hover)}*::-webkit-scrollbar-thumb:active{background:var(--accent)}
body{margin:0;background:var(--bg)}button,input,textarea,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--border);border-radius:var(--radius);padding:9px 14px;background:var(--surface);color:var(--text);min-height:44px;transition:background .15s}button:hover{background:var(--tint)}button:active{transform:translateY(1px)}button:disabled{cursor:not-allowed;opacity:.5;transform:none}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px;cursor:pointer}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{background:#185340}button.danger{color:var(--danger);border-color:var(--danger)}button.ghost{border-color:transparent;background:transparent}button.ghost:hover{background:var(--tint)}.icon{width:44px;padding:8px;font-size:20px;flex-shrink:0}.muted,.hint{color:var(--muted)}.hint{font-size:13px}.error{color:var(--danger);min-height:26px;overflow-wrap:anywhere}.row{display:flex;align-items:center;gap:10px}.spread{justify-content:space-between}.wrap{flex-wrap:wrap}.stack{display:grid;gap:16px}.hidden{display:none!important}h1,h2,h3,p{margin-top:0}h1{font-size:25px;line-height:1.3;font-weight:600}h2{font-size:20px;line-height:1.4;font-weight:600}h3{font-size:16px}label{display:block;font-size:14px;font-weight:600}input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text)}input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}textarea{resize:none;min-height:60px;max-height:220px}input[aria-invalid=true]{border-color:var(--danger)}.field{display:grid;gap:5px}.field .hint{font-weight:400}hr{border:0;border-top:1px solid var(--border);margin:24px 0}.brand{font-weight:700;font-size:14px;letter-spacing:.17em}.brand em{font-style:normal;color:var(--accent)}.badge{font-size:12px;color:var(--muted);border:1px solid var(--border);padding:2px 7px;border-radius:5px}
.boot{min-height:100dvh;display:grid;place-items:center;color:var(--muted)}.login{min-height:100dvh;display:grid;place-items:center;padding:24px}.login-inner{max-width:440px;width:100%}.login .brand{margin-bottom:44px}.login h1{font-size:34px;line-height:1.2;letter-spacing:-.025em}.login p{color:var(--muted)}.login button{width:100%;margin-top:16px}.login .privacy{margin-top:24px;font-size:13px;padding-top:20px;border-top:1px solid var(--border)}.login-status{min-height:52px;margin-top:12px}.shell{height:100dvh;display:flex}.sidebar{width:var(--sidebar);flex-shrink:0;padding:24px 14px 16px;display:flex;flex-direction:column;gap:20px;background:#112c28;border-right:1px solid var(--border)}.sidebar .brand{padding:0 12px}.nav{display:grid;gap:4px}.nav button{text-align:left;background:transparent;border:0}.nav button.active{background:var(--surface);box-shadow:inset 3px 0 var(--accent)}.sidebar-bottom{margin-top:auto;display:grid;gap:8px}.identity{padding:12px;font-size:13px;overflow-wrap:anywhere}.workspace{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--surface)}.topbar{min-height:73px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 28px}.topbar h1{font-size:18px;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mobile-menu{display:none}.page{overflow:auto;flex:1;padding:32px;scrollbar-gutter:stable}.page-inner{max-width:1060px;margin:auto}.subhead{margin-bottom:28px}.search{position:relative;max-width:520px;margin:16px 0}.search input{padding-right:46px}.search button{position:absolute;right:0;top:0;border:0;background:transparent}.list{border-top:1px solid var(--border)}.list-item{padding:17px 4px;border-bottom:1px solid var(--border);gap:16px;display:flex;align-items:center;justify-content:space-between}.list-title{font-weight:500;overflow-wrap:anywhere}.list-content{min-width:0;flex:1}.list-item .actions{display:flex;gap:6px;flex-shrink:0}.list-link{text-align:left;border:0;padding:0;min-height:44px;background:none;border-radius:0;display:block;width:100%}.empty{padding:64px 20px;text-align:center;color:var(--muted)}.empty h2{color:var(--text)}.pagination{display:flex;align-items:center;gap:12px;justify-content:flex-end;margin:20px 0;font-size:14px}.meter{height:8px;background:var(--track);border-radius:8px;overflow:hidden;margin:14px 0}.meter-fill{height:100%;background:var(--accent);width:var(--percent)}.stats{display:flex;gap:32px;flex-wrap:wrap}.stat b{display:block;font-size:24px;font-weight:600}.stat span{font-size:13px;color:var(--muted)}.panel{border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.checkline{display:flex;align-items:center;gap:10px;font-weight:400;min-height:44px}.status-line{font-size:13px;color:var(--muted);padding:10px 28px;border-bottom:1px solid var(--border);min-height:42px}.status-line:empty{display:none}.job-status{border-left:3px solid var(--accent);padding:8px 12px;margin:12px 0;color:var(--muted);font-size:14px}
.messages{flex:1;overflow-y:auto;padding:28px max(20px,calc((100% - 800px)/2));scrollbar-gutter:stable;overscroll-behavior:contain}.message{margin:0 0 28px;overflow-wrap:anywhere;min-width:0}.message-label{font-size:12px;color:var(--muted);margin-bottom:8px;display:flex;align-items:center;justify-content:space-between}.message-label button{min-height:28px;font-size:12px;padding:2px 8px}.message.user{margin-left:12%;background:var(--bg);padding:16px 20px;border-radius:14px}.message.assistant{padding:0}.message-text{white-space:pre-wrap}.message pre{white-space:pre;overflow:auto;max-width:100%;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:14px;font:13px/1.6 ui-monospace,monospace}.message code{font-family:ui-monospace,monospace;font-size:.9em;background:var(--bg)}.message p:last-child{margin-bottom:0}.typing{display:inline-block;width:7px;height:17px;background:var(--accent);vertical-align:middle;animation:pulse 1.2s infinite}.composer-wrap{padding:12px max(20px,calc((100% - 800px)/2)) max(12px,env(safe-area-inset-bottom));background:var(--surface)}.composer{border:1px solid var(--border);border-radius:18px;padding:8px 10px;background:var(--surface);box-shadow:0 3px 14px #172b2908}.composer:focus-within{border-color:var(--accent)}.composer textarea{border:0;padding:8px;outline:none;background:transparent}.composer-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px}.composer-note{text-align:center;font-size:12px;color:var(--muted);margin:7px 0 0}.attachment{font-size:13px;padding:8px 12px;background:var(--bg);border-radius:8px;overflow-wrap:anywhere;display:flex;align-items:center;justify-content:space-between;gap:8px}.file-chips{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.file-chips a{font-size:13px;border:1px solid var(--border);border-radius:8px;padding:8px 12px;overflow-wrap:anywhere}.jump{align-self:center;margin:5px;min-height:36px;font-size:13px}.readonly{padding:16px;text-align:center;color:var(--muted)}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
dialog{border:1px solid var(--border);border-radius:16px;max-width:min(560px,calc(100vw - 24px));width:100%;max-height:calc(100dvh - 40px);padding:24px;color:var(--text);box-shadow:0 16px 60px #172b2930;overflow:auto}dialog::backdrop{background:#172b2960}dialog h2{margin-bottom:16px}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:10;max-width:calc(100vw - 32px);background:var(--text);color:white;padding:0;border-radius:10px;font-size:14px;pointer-events:none}#notice:not(:empty){padding:12px 20px}#navigation{margin:0;height:100dvh;max-height:100dvh;width:280px;border-radius:0;border:0;padding:18px}#navigation .sidebar{width:auto;border:0;height:calc(100% - 48px);padding:16px 0;background:var(--surface)}
@keyframes pulse{50%{opacity:.3}}@media(max-width:760px){.sidebar{display:none}.mobile-menu{display:inline-block}.topbar{padding:10px 14px;min-height:65px}.topbar h1{font-size:16px}.page{padding:24px 16px}.messages{padding:22px 16px}.composer-wrap{padding-left:12px;padding-right:12px}.message.user{margin-left:8%;padding:12px 16px}.settings-grid{grid-template-columns:1fr}.list-item{align-items:flex-start}.list-item .actions{flex-wrap:wrap;max-width:105px;justify-content:flex-end}.list-item .actions button{font-size:13px;padding:8px}.status-line{padding:8px 16px}#navigation .sidebar{display:flex}.login h1{font-size:30px}.pagination{justify-content:space-between}.stat b{font-size:21px}.stats{gap:20px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(forced-colors:active){*{scrollbar-color:auto}.nav button.active{border:2px solid Highlight}.meter-fill{background:Highlight}}
/* Keep long conversation titles inside narrow phone headers. */
.topbar>.row:first-child{min-width:0;flex:1}.topbar h1{min-width:0}.messages,.page{min-height:0}
.message-label button{white-space:nowrap;flex-shrink:0}.message-label{gap:8px}.rename-icon{display:none}#send{display:flex;align-items:center;gap:8px;white-space:nowrap;justify-content:center}.composer-toolbar>.row{min-width:0}
@media(max-width:480px){.rename-label,.send-label{display:none}.rename-icon{display:block}#rename,#send{width:44px;padding:10px}.composer-toolbar .hint{font-size:12px}.message-label{font-size:11px}}

/* rAI identity: forest frame, light writing canvas, geometric wordmark. */
.brand{letter-spacing:0;display:flex;flex-direction:column;align-items:flex-start;gap:2px;color:var(--text)}
.brand svg{width:100px;height:56px;display:block}.brand span{font-size:11px;font-weight:500;letter-spacing:.025em;color:var(--muted)}
.sidebar{background:var(--sidebar-bg);color:var(--sidebar-text);border:0;padding:22px 16px;gap:30px}
.sidebar .brand{color:var(--sidebar-text);padding:0 12px}.sidebar .brand span{color:var(--sidebar-muted)}
.sidebar .primary{background:var(--brand-highlight);color:var(--sidebar-bg);border-color:var(--brand-highlight);font-weight:600;box-shadow:none}
.sidebar .primary:hover{background:#e3f7b5}.sidebar .nav{gap:7px}.nav button{display:flex;align-items:center;gap:12px;font-size:14px}.nav svg{flex-shrink:0}
.sidebar .nav button{color:var(--sidebar-muted);padding:12px}.sidebar .nav button:hover,.sidebar .ghost:hover{background:#203d35;color:var(--sidebar-text)}
.sidebar .nav button.active{background:#29483d;color:#f4f5f0;box-shadow:inset 3px 0 var(--brand-highlight)}
.sidebar .ghost{color:var(--sidebar-muted)}.sidebar .muted{color:var(--sidebar-muted)}.sidebar .identity{border-top:1px solid #355048;padding-top:22px}.sidebar-bottom{gap:2px}
.sidebar :focus-visible{outline-color:var(--brand-highlight)}
.topbar{min-height:80px;padding:16px 32px}.topbar h1{font-weight:600;letter-spacing:-.025em}.workspace{background:#fbfcf9}
.page{padding:36px}.page-inner{max-width:1000px}.subhead{margin-bottom:24px}.subhead p{max-width:740px;font-size:14px}
.panel{background:var(--surface);border-radius:18px;padding:24px}.list-item{padding:20px 8px}.list-title{font-weight:600;letter-spacing:-.015em}.search input{background:var(--surface)}
.stat b{font-variant-numeric:tabular-nums;font-size:28px;letter-spacing:-.04em}.meter{height:6px;margin:20px 0 26px}.badge{background:var(--tint);border:0;color:var(--accent)}
.messages{padding-top:40px}.message{margin-bottom:36px;line-height:1.75}.message-label{margin-bottom:10px;letter-spacing:.015em}.message.user{background:#edf3e9;border:1px solid #e2ebdc;border-radius:20px 20px 5px 20px;padding:18px 22px}
.message.assistant>.message-label>span{color:var(--accent);font-weight:600}.message.assistant>.message-label>span:before{content:'';display:inline-block;width:7px;height:7px;background:var(--accent);border-radius:2px;margin-right:8px}
.composer-wrap{background:#fbfcf9;padding-bottom:max(16px,env(safe-area-inset-bottom))}.composer{padding:12px;border-radius:22px;box-shadow:0 8px 28px #172b290a}.composer:focus-within{box-shadow:0 0 0 3px #236b5910;border-color:var(--accent)}
.composer textarea{padding:8px 10px 14px;min-height:76px}.composer-toolbar{padding:0 2px 2px}.composer #send{border-radius:12px}.composer-note{margin-top:12px;font-size:11px;line-height:1.5}.file-chips a{background:var(--surface);border-radius:12px}
.eyebrow{font-size:10px;font-weight:650;letter-spacing:.16em;color:var(--muted);display:block}.chat-welcome{padding-top:clamp(30px,8vh,96px)}.welcome-mark{color:var(--accent);--brand-highlight:var(--accent);width:94px;margin:0 auto 22px}.welcome-mark svg{display:block;width:100%}.chat-welcome h2{font-size:30px;letter-spacing:-.04em;margin:12px 0}.chat-welcome p{max-width:360px;margin:0 auto;font-size:14px}
.login{padding:28px;display:grid;grid-template-columns:minmax(300px,1fr) minmax(400px,1fr);gap:7vw;background:var(--bg);align-items:center}
.login-art{width:100%;position:relative;overflow:hidden;background:var(--sidebar-bg);color:var(--sidebar-text);border-radius:28px;align-self:stretch;min-height:640px;display:flex;flex-direction:column;padding:36px}
.login-art .brand{color:var(--sidebar-text);margin:0;position:relative;z-index:1}.login-art .brand span{color:var(--sidebar-muted)}
.art-wordmark{width:min(90%,440px);margin:auto;position:relative;z-index:1}.art-wordmark svg{display:block;width:100%}.art-caption{position:relative;z-index:1}.art-caption .eyebrow{color:var(--sidebar-muted);margin-bottom:18px}.art-caption p{font-size:clamp(24px,2.6vw,40px);line-height:1.25;letter-spacing:-.035em;margin:0;color:var(--sidebar-text)}
.art-orbit{width:600px;height:600px;border:1px solid #466247;border-radius:50%;position:absolute;left:30%;top:18%;transform:rotate(-25deg)}.art-orbit:before,.art-orbit:after{content:'';position:absolute;border:1px solid #466247;border-radius:50%;inset:48px}.art-orbit:after{inset:96px}
.login-inner{max-width:420px;justify-self:start;padding:36px 0}.login-inner>.eyebrow{margin-bottom:24px;color:var(--accent)}.login h1{font-size:clamp(34px,3.3vw,48px);letter-spacing:-.055em;line-height:1.12;margin-bottom:24px}.login-inner>p:first-of-type{font-size:16px;line-height:1.8}.login button{margin-top:20px;padding:14px 18px;display:flex;justify-content:space-between;align-items:center;border-radius:12px;font-weight:600}.login-status{min-height:26px;font-size:13px}.login .privacy{margin-top:22px;line-height:1.7}.login .hint{font-size:12px}
#navigation{background:var(--sidebar-bg);color:var(--sidebar-text);width:288px}#navigation>.ghost{color:var(--sidebar-text)}#navigation .sidebar{background:var(--sidebar-bg)}
@media(max-width:1000px){.login{gap:5vw}.login-art{padding:28px;min-height:600px}.login-inner{padding-right:12px}.sidebar{width:248px;padding-left:12px;padding-right:12px}.nav button{font-size:13px}}
@media(max-width:760px){.topbar{min-height:68px;padding:12px 16px}.page{padding:24px 16px}.panel{padding:20px;border-radius:16px}.messages{padding:28px 18px}.message.user{padding:14px 16px}.message{margin-bottom:28px}.composer-wrap{padding-left:12px;padding-right:12px}.composer{padding:8px;border-radius:18px}.composer textarea{min-height:64px}.stat b{font-size:24px}.login{display:block;padding:20px}.login-art{min-height:0;height:180px;padding:20px;border-radius:22px;display:block}.login-art .brand{position:absolute;top:20px;left:24px}.login-art .brand svg{width:72px;height:40px}.login-art .brand span{display:none}.art-wordmark{position:absolute;width:170px;right:22px;top:34px}.art-caption{position:absolute;left:24px;bottom:24px}.art-caption .eyebrow{display:none}.art-caption p{font-size:18px;max-width:150px}.art-orbit{width:320px;height:320px;left:48%;top:-30px}.login-inner{max-width:440px;padding:34px 8px 0;margin:auto}.login-inner>.eyebrow{margin-bottom:18px}.login h1{font-size:36px}.login-inner>p:first-of-type{font-size:15px}.login .privacy{margin-top:16px}.chat-welcome h2{font-size:27px}.chat-welcome{padding:40px 12px}.list-item{padding:18px 2px}#navigation .sidebar{width:auto}}
@media(max-width:360px){.login-art{height:156px}.art-wordmark{width:136px;right:12px;top:36px}.art-caption p{font-size:16px;max-width:130px}.login{padding:14px}.login-inner{padding-top:28px}.login h1{font-size:32px}.composer-note{font-size:10px}}
/* One mark and a separate caption on phones; never overlap the wordmark. */
@media(max-width:760px){.login-art .brand{display:none}.art-wordmark{left:22px;right:auto;top:38px;width:140px}.art-caption{left:auto;right:22px;top:48px;bottom:auto;width:calc(50% - 24px)}.art-caption p{font-size:16px;max-width:none}.art-orbit{left:12%}}
@media(max-width:360px){.art-wordmark{left:18px;top:34px;width:122px}.art-caption{right:16px;top:30px;width:118px}.art-caption p{font-size:15px}}