:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#22344c;background:#f5f8fc}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0;border-radius:10px;padding:10px 13px}button:disabled{opacity:.5;cursor:wait}.primary{background:#246eb6;color:white;font-weight:650}.quiet{background:transparent;color:#37638e;text-align:left}.quiet:hover,.folder:hover,.chatitem:hover{background:#edf4fb}.full{width:100%}.hidden{display:none!important}.muted{color:#8291a3}.error{color:#ba3448;font-size:13px;white-space:pre-wrap}.card{background:white;border:1px solid #e0e8f0;border-radius:20px;box-shadow:0 14px 50px #1c3c5c12}.authscreen{min-height:100dvh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at 20% 20%,#dfeeff,transparent 40%),#f5f8fc}.login{width:min(100%,400px);padding:35px;text-align:center}.logo{font-size:32px;color:#2779c4;background:#e6f2ff;border-radius:18px;width:65px;height:65px;display:grid;place-items:center;margin:0 auto 12px}.login h1{margin:8px 0 4px}.login form{display:grid;gap:16px;margin-top:28px;text-align:left}label{font-size:13px;font-weight:650;display:grid;gap:7px}input,select,textarea{background:white;border:1px solid #cbd7e3;border-radius:10px;padding:12px;outline:none;min-width:0}input:focus,select:focus,textarea:focus{border-color:#2779c4;box-shadow:0 0 0 3px #b4d9fa}.app{display:grid;grid-template-columns:285px minmax(0,1fr);height:100dvh}aside{background:white;border-right:1px solid #e0e8f0;padding:18px;display:flex;flex-direction:column;gap:12px;min-height:0}.sidehead{display:flex;align-items:center;justify-content:space-between;padding:6px 4px 15px}.wordmark{font-weight:800;font-size:19px}.wordmark small{font-size:10px;color:#8291a3}.tree{flex:1;overflow-y:auto;min-height:0}.folder,.chatitem{display:flex;align-items:center;gap:8px;border-radius:9px;padding:8px;cursor:pointer;min-width:0}.folder{font-weight:700}.folder .name,.chatitem .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chatitem{font-size:13px;margin-left:12px}.chatitem.selected{background:#e5f1fd;color:#1c66aa}.tinybtn{font-size:13px;padding:3px 7px;color:#66829c;background:transparent}.sidebottom{border-top:1px solid #e6ecf3;padding-top:12px}.who{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:10px 4px;font-size:13px}.topbar{height:70px;background:white;border-bottom:1px solid #e4eaf1;display:flex;align-items:center;gap:12px;padding:0 24px}.topbar strong{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar select{max-width:280px}.app main{display:flex;flex-direction:column;min-height:0;min-width:0}.welcome{flex:1;display:grid;place-content:center;text-align:center}.welcome h2{margin:8px}.messages{flex:1;overflow-y:auto;padding:25px max(24px,calc((100% - 850px)/2));display:flex;flex-direction:column;gap:20px}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.55;padding:15px 18px;border-radius:16px;max-width:90%;background:white;border:1px solid #e2eaf3}.bubble.user{align-self:flex-end;background:#e7f2ff;border-color:#d5e8fc}.bubble.assistant{align-self:flex-start}.composer{display:flex;align-items:end;gap:12px;padding:16px max(24px,calc((100% - 850px)/2))}.composer textarea{resize:vertical;flex:1;max-height:180px}.app main>.error{padding:0 24px 10px}.modal{position:fixed;inset:0;background:#13283c99;z-index:50;display:grid;place-items:center;padding:18px}.dialog{padding:25px;width:min(100%,540px);max-height:85dvh;overflow:auto}.dialog h2{margin:0 0 20px}.dialog label{margin:13px 0}.dialog input,.dialog select{width:100%}.actions{display:flex;gap:8px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}.userrow{border-bottom:1px solid #e5eaf0;padding:12px 0;display:flex;justify-content:space-between;gap:8px;align-items:center;flex-wrap:wrap}.mobile{display:none}.iconbtn{background:transparent;color:#476780}@media(max-width:750px){.app{grid-template-columns:1fr}.app aside{position:fixed;z-index:20;inset:0 auto 0 0;width:min(88vw,330px);box-shadow:10px 0 40px #0002}.app aside.closed{display:none}.mobile{display:block}.topbar{padding:0 12px;height:62px}.topbar select{max-width:155px;font-size:12px}.messages{padding:18px 12px}.composer{padding:12px}.composer button{padding:12px 9px}.login{padding:26px}}

/* V2 UI refinement: compact project navigation and settings */
:root{--accent:#256faf;--border:#e5eaf1;--ink:#24364b;--muted:#718398}
body{color:var(--ink)}
aside{background:#fbfcff;padding:16px 13px;gap:9px}
.sidehead{padding:9px 10px 20px}
.wordmark{letter-spacing:-.5px}
#newChat{padding:13px;border-radius:12px;box-shadow:0 3px 8px #1c69ad18}
#newFolder{border:1px dashed #c7d8e9;background:#f2f7fd;text-align:center;border-radius:11px;padding:11px}
.tree{padding-top:10px}
.folder{font-size:13px;min-height:39px;padding:8px 9px;color:#344d67}
.chatitem{font-size:13px;min-height:37px;margin:2px 0;border-radius:9px;padding:8px 9px}
.chatitem .name{line-height:1.35}
.chatitem.selected{background:#dcecfb;color:#1e6098;font-weight:650}
.tinybtn{border-radius:8px;min-width:28px;min-height:27px}
.sidebottom{padding-top:13px}
#settingsBtn{border-radius:10px;padding:12px;background:#f0f5fb}
.who{background:#fff;border:1px solid var(--border);border-radius:12px;margin-top:10px;padding:8px 12px}
.topbar{box-shadow:0 2px 8px #12334b05}
.topbar select{border-color:#dbe5ef;background:#f8fbff}
.dialog{padding:27px;width:min(100%,500px);border-radius:19px;box-shadow:0 20px 70px #142d4740}
.dialog h2{font-size:22px;letter-spacing:-.5px}
.dialog .quiet{padding:10px 12px;border-radius:10px}
.dialog .quiet:hover{background:#edf4fb}
.dialog .primary{margin-top:10px}
.dialog input,.dialog select{background:#fbfdff}
.dialog hr{border:0;border-top:1px solid var(--border);margin:21px 0}
.dialog .userrow{padding:12px 4px}
.dialog .userrow strong{font-size:14px}
.dialog .userrow button{border:1px solid #dbe6f0;background:#f5f9fd}
.dialog .actions{border-top:1px solid var(--border);padding-top:12px}
@media(max-width:750px){
 .dialog{padding:23px 20px;width:min(100%,440px);max-height:calc(100dvh - 65px)}
 .dialog h2{font-size:20px}
 .sidehead{padding-top:10px}
 .wordmark{font-size:18px}
 .bubble{max-width:96%;font-size:14px}
 .topbar strong{font-size:15px}
}

.password-wrap{display:flex;align-items:center;position:relative;width:100%}
.password-wrap input{width:100%;padding-right:96px;min-width:0}
.password-toggle{position:absolute;right:7px;top:50%;transform:translateY(-50%);padding:7px 9px;background:#eef5fc;color:#2c669d;font-size:12px;font-weight:650;border-radius:7px;white-space:nowrap}
.password-toggle:hover{background:#dcecfb}

#tokensBtn{border-radius:10px;padding:12px;background:#eaf3fc;color:#245e93;font-weight:650;margin-bottom:5px}
.token-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:15px 0 22px}
.token-card{border:1px solid #dfe9f2;border-radius:12px;background:#f6faff;padding:13px;display:grid;gap:6px}
.token-card small{color:#72869a;font-size:12px}.token-card strong{font-size:20px}
.token-model{display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid #e4eaf0;padding:12px 0;font-size:13px;flex-wrap:wrap}

/* Statistics dialogs: shared compact action row, no separate close footer */
.stats-dialog .dialog>.actions{justify-content:space-between;align-items:center;gap:8px;margin-top:8px;border-top:1px solid #e6ecf3;padding-top:10px;flex-wrap:nowrap}
.stats-dialog .dialog>.actions button{margin:0;white-space:nowrap}
.stats-dialog .dialog{padding-bottom:14px}
@media(max-width:540px){.stats-dialog .dialog>.actions button{font-size:13px;padding:9px 10px}}

/* Statistics toolbar is inside scrollable content, immediately below heading */
.stats-dialog .dialog>.actions{display:none}
.stats-toolbar{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;margin:0 0 12px;max-width:100%;min-width:0}
.stats-toolbar button{font-size:12px;padding:9px 8px;white-space:nowrap;min-width:0;flex:1;text-align:center}
.stats-dialog .dialog{overflow-x:hidden}

/* Compact equal-height statistics action buttons on narrow screens */
.stats-toolbar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;width:100%;margin:2px 0 14px;align-items:stretch}
.stats-toolbar button{display:flex;align-items:center;justify-content:center;min-width:0;width:100%;min-height:40px;padding:7px 4px;font-size:clamp(10px,2.7vw,13px);font-weight:600;line-height:1.15;text-align:center;white-space:normal;overflow-wrap:normal;word-break:normal;border-radius:9px}
.stats-toolbar button.quiet{background:#edf3f9;color:#315a80}
.stats-toolbar:has(>button:nth-child(2):last-child){grid-template-columns:repeat(2,minmax(0,1fr))}
/* Fixed, equal button height regardless of one/two-line labels */
.stats-toolbar{align-items:stretch}
.stats-toolbar button{height:48px;min-height:48px;max-height:48px;box-sizing:border-box;align-self:stretch;line-height:1.15}
/* Normalize UA/default .primary button metrics and center all labels on the same baseline */
.stats-toolbar{align-items:center!important}
.stats-toolbar>button{display:flex!important;align-items:center!important;justify-content:center!important;height:48px!important;min-height:48px!important;max-height:48px!important;padding:0 4px!important;margin:0!important;line-height:1.15!important;vertical-align:middle!important;flex:none!important;align-self:center!important;transform:none!important}

.model-picker{max-width:280px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border:1px solid #dbe5ef;background:#f8fbff;color:#22344c;padding:12px;text-align:left}
@media(max-width:750px){.model-picker{max-width:155px;font-size:12px}}

.file-workspace{flex:1;min-height:0;overflow:auto;padding:24px max(20px,calc((100% - 1100px)/2));background:#f6f9fc}.file-heading{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap}.file-heading h2{margin:0}.file-trail{color:#66829c;overflow-wrap:anywhere}.file-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:20px 0}.file-list{background:white;border:1px solid #e0e8f0;border-radius:14px;overflow:hidden}.file-list>p{padding:18px}.file-row{display:flex;align-items:center;gap:12px;padding:9px 14px;border-bottom:1px solid #e7edf3;min-width:0}.file-row:last-child{border-bottom:0}.file-name{background:transparent;text-align:left;flex:1;min-width:0;overflow-wrap:anywhere;color:#234969}.file-name:hover{background:#edf4fb}.file-meta{color:#8091a3;font-size:12px;white-space:nowrap}.file-menu{font-size:23px;padding:5px 14px;background:#f0f5fb;color:#335c82}.file-editor{display:block;width:100%;height:min(65vh,700px);margin:14px 0;font-family:monospace;resize:vertical}@media(max-width:750px){.file-workspace{padding:16px 12px}.file-heading{gap:5px}.file-row{padding:8px}.file-name{font-size:14px}.file-meta{font-size:11px}}

.pdf-pages{display:flex;flex-direction:column;align-items:center;gap:14px}.pdf-page{display:block;max-width:100%;height:auto;background:white;box-shadow:0 1px 7px #0002}

.pdf-pages{align-items:flex-start;overflow-x:auto;max-width:100%;padding:6px}.pdf-page{max-width:none;flex-shrink:0;align-self:center}

/* PDF: keep actions visible; anchor enlarged pages to the left edge. */
.pdf-toolbar{position:sticky;top:0;z-index:8;background:#f6f9fc;border-bottom:1px solid #dbe4ee;padding:10px 4px;margin:-10px 0 14px;display:flex;flex-wrap:wrap;align-items:center}
.pdf-toolbar .file-toolbar{margin:0;display:flex;flex-wrap:wrap;gap:8px}
.pdf-pages{display:block;overflow-x:auto;overflow-y:visible;width:100%;max-width:100%;box-sizing:border-box;scrollbar-gutter:stable;overscroll-behavior-x:contain}
.pdf-page{display:block;max-width:none!important;flex-shrink:0;align-self:auto;margin-top:0;margin-bottom:14px}
@media(max-width:750px){.pdf-toolbar{gap:6px}.pdf-toolbar .file-toolbar{gap:5px}}

/* ZeN Chat response typography — safe DOM rendering */
.bubble.assistant{white-space:normal;line-height:1.65;font-size:15px;max-width:min(100%,850px);padding:20px 24px}
.bubble.assistant p{margin:0 0 13px}.bubble.assistant p:last-child{margin-bottom:0}
.bubble.assistant h1,.bubble.assistant h2,.bubble.assistant h3,.bubble.assistant h4{line-height:1.3;margin:20px 0 10px;color:#1e3045}
.bubble.assistant h1{font-size:1.4em}.bubble.assistant h2{font-size:1.25em}.bubble.assistant h3{font-size:1.13em}.bubble.assistant h4{font-size:1.05em}
.bubble.assistant ul,.bubble.assistant ol{padding-left:23px;margin:9px 0 15px}.bubble.assistant li{margin:5px 0}
.bubble.assistant code{background:#edf2f8;padding:2px 5px;border-radius:5px;font-size:.91em}
.bubble.assistant a{color:#1767af;text-decoration:underline}
@media(max-width:750px){.bubble.assistant{padding:17px 18px;font-size:15px;max-width:100%}}

.answer-actions{display:flex;justify-content:flex-start;margin-top:14px;padding-top:10px;border-top:1px solid #edf1f5}.copy-answer{background:transparent;border:1px solid #dce5ee;border-radius:9px;color:#456780;font-size:13px;padding:7px 12px;min-height:34px}.copy-answer:hover{background:#eef5fc}.copy-answer:focus-visible{outline:2px solid #2779c4;outline-offset:2px}

/* Compact copy action for both sides of chat */
.bubble .message-actions{display:flex;justify-content:flex-end;margin-top:4px;height:22px}
.bubble .copy-icon{display:inline-flex;align-items:center;justify-content:center;width:26px;height:24px;min-height:0;padding:2px;border:0;border-radius:6px;background:transparent;color:#8293a5;opacity:.78}
.bubble .copy-icon:hover,.bubble .copy-icon:focus-visible{background:#edf3fa;color:#2d6ba5;opacity:1}
.bubble .copy-icon.copied{color:#16865c;opacity:1}
.bubble.user .copy-icon:hover{background:#d7e8fa}
.bubble.user .message-content{white-space:pre-wrap}
@media(max-width:750px){.bubble .copy-icon{opacity:.88}}

/* ZeN Chat adaptive composer: expands upwards, scrolls internally after cap */
.composer{flex-shrink:0;align-items:flex-end;gap:10px}
.composer textarea#prompt{resize:none;display:block;flex:1;min-height:48px;height:48px;max-height:min(44dvh,360px);overflow-y:hidden;line-height:1.5;border-radius:18px;padding:12px 15px;overscroll-behavior:contain;scrollbar-width:thin}
.composer #send{min-height:48px;flex-shrink:0;border-radius:15px}
.messages{min-height:0;overscroll-behavior:contain}
@media(max-width:750px){.composer{padding:10px 12px calc(10px + env(safe-area-inset-bottom,0px));gap:9px;background:#f5f8fc}.composer textarea#prompt{font-size:16px;min-height:46px;height:46px;max-height:min(43dvh,340px);border-radius:17px}.composer #send{min-height:46px;padding:10px 12px;border-radius:14px}}

/* Full-width adaptive ChatGPT-style message composer */
.composer{display:block;width:100%;padding:12px max(24px,calc((100% - 850px)/2));flex-shrink:0}
.composer-shell{width:100%;display:flex;flex-direction:column;background:#fff;border:1px solid #cbd7e3;border-radius:25px;padding:5px 7px 7px 13px;box-shadow:0 2px 12px #1c3c5c0a;transition:border-color .15s,box-shadow .15s}
.composer-shell:focus-within{border-color:#78b5e8;box-shadow:0 0 0 3px #b4d9fa55}
.composer textarea#prompt{box-sizing:border-box;width:100%;flex:none;display:block;min-height:37px;height:37px;max-height:min(43dvh,340px);padding:8px 8px 3px 2px;margin:0;border:0;border-radius:0;background:transparent;box-shadow:none!important;resize:none;line-height:1.5;font-size:16px;overflow-y:hidden;overflow-x:hidden;outline:0;overscroll-behavior:contain;scrollbar-width:thin}
.composer-actions{display:flex;justify-content:flex-end;align-items:center;min-height:40px;padding:1px 0 0}
.composer #send{display:grid;place-items:center;width:39px;height:39px;min-height:39px;min-width:39px;padding:0;border-radius:50%;background:#246eb6;color:white;flex:none}
.composer #send svg{display:block}
@media(max-width:750px){.composer{padding:8px 12px calc(8px + env(safe-area-inset-bottom,0px));background:#f5f8fc}.composer-shell{border-radius:24px;padding:4px 7px 6px 13px}.composer textarea#prompt{min-height:35px;height:35px;max-height:min(43dvh,340px);padding:7px 7px 2px 1px;font-size:16px}.composer-actions{min-height:38px}.composer #send{width:38px;height:38px;min-width:38px;min-height:38px}}

/* Nine visible text lines; excess text scrolls inside the input */
.composer textarea#prompt{max-height:none;overflow-y:auto;touch-action:pan-y;overscroll-behavior:contain}