/* Working — interface design system.
   One neutral, slightly warm dark palette; one highlighter accent used only for state;
   Geist for interface text, Geist Mono for code and keys, Instrument Serif for the greeting. */
@font-face{font-family:"Geist";src:url("/fonts/Geist-Variable.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Geist";src:url("/fonts/Geist-Italic-Variable.woff2") format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("/fonts/GeistMono-Variable.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Instrument Serif";src:url("/fonts/InstrumentSerif-Regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Instrument Serif";src:url("/fonts/InstrumentSerif-Italic.woff2") format("woff2");font-weight:400;font-style:italic;font-display:swap}

:root{
 --font-sans:"Geist",ui-sans-serif,system-ui,"Segoe UI",sans-serif;--font-mono:"Geist Mono",ui-monospace,"Cascadia Code",Consolas,monospace;--font-serif:"Instrument Serif",Georgia,serif;
 --bg:#131312;--bg-sidebar:#0f0f0e;--surface:#191918;--surface-2:#1f1f1e;--surface-3:#272725;--surface-4:#30302e;--overlay:#1b1b1a;
 --line:rgba(255,255,255,.07);--line-2:rgba(255,255,255,.11);--line-3:rgba(255,255,255,.17);
 --text:#ececea;--text-2:#b9b9b4;--text-3:#8b8b85;--text-4:#62625d;
 --accent:#ecebe6;--accent-soft:rgba(255,255,255,.07);--accent-ink:#141413;
 --danger:#ff8a7a;--danger-soft:rgba(255,138,122,.12);--success:#86dca0;--success-soft:rgba(134,220,160,.12);--warn:#f3c86d;
 --r-xs:6px;--r-sm:8px;--r-md:10px;--r-lg:14px;--r-xl:18px;--r-2xl:24px;
 --shadow-pop:0 0 0 1px rgba(255,255,255,.06),0 16px 40px -12px rgba(0,0,0,.7),0 4px 12px -4px rgba(0,0,0,.4);
 --shadow-raise:0 1px 0 rgba(255,255,255,.04) inset,0 1px 2px rgba(0,0,0,.35);
 --ease-out:cubic-bezier(.22,1,.36,1);--ease-io:cubic-bezier(.76,0,.24,1);--spring:cubic-bezier(.34,1.5,.64,1);
 --fast:120ms;--med:200ms;--slow:340ms;
 --sidebar:264px;--reading-width:720px;--prompt-width:752px;
 font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--text);background:var(--bg);color-scheme:dark;
 font-feature-settings:"ss01" 0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);overflow:hidden}
button,input,textarea,select{font:inherit;color:inherit;letter-spacing:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
button:disabled{cursor:default}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:var(--accent-ink)}
:focus-visible{outline:2px solid color-mix(in srgb,var(--accent) 70%,transparent);outline-offset:2px}
svg{width:18px;height:18px;flex-shrink:0;fill:currentColor;vertical-align:middle}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
kbd,.kbd{font-family:var(--font-mono);font-size:11px;font-weight:500;line-height:1;color:var(--text-3);display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 5px;border-radius:5px;background:var(--surface-3);box-shadow:inset 0 -1px 0 rgba(0,0,0,.35),0 0 0 1px var(--line)}

/* ── Buttons ─────────────────────────────────────────────── */
.icon-button{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:var(--r-sm);color:var(--text-3);transition:background var(--fast),color var(--fast),transform var(--fast)}
.icon-button:hover{background:var(--surface-3);color:var(--text)}
.icon-button:active{transform:scale(.94)}
.icon-button svg{width:18px;height:18px;transition:transform var(--med) var(--spring)}
.icon-button:hover svg{transform:scale(1.06)}
.primary,.secondary,.ghost{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:7px;height:34px;padding:0 14px;border-radius:var(--r-md);font-size:13px;font-weight:550;line-height:1;white-space:nowrap;transition:background var(--fast),color var(--fast),box-shadow var(--fast),transform var(--fast) var(--ease-out),opacity var(--fast)}
.primary{background:var(--text);color:#111110;box-shadow:inset 0 -1px 0 rgba(0,0,0,.18),0 1px 2px rgba(0,0,0,.4)}
.primary:hover:enabled{background:#fff}
.secondary{background:var(--surface-3);color:var(--text);box-shadow:inset 0 0 0 1px var(--line-2),var(--shadow-raise)}
.secondary:hover:enabled{background:var(--surface-4)}
.ghost{color:var(--text-2)}.ghost:hover:enabled{background:var(--surface-3);color:var(--text)}
.primary:active:enabled,.secondary:active:enabled,.ghost:active:enabled{transform:scale(.97)}
.primary:disabled,.secondary:disabled{opacity:.4}
.primary svg,.secondary svg,.ghost svg{width:16px;height:16px}
.secondary.destructive,.ghost.destructive{color:var(--danger)}
.secondary.destructive:hover:enabled{background:var(--danger-soft)}
.text-button{display:block;margin:6px auto;padding:6px 8px;font-size:13px;color:var(--text-2);border-radius:var(--r-sm);transition:color var(--fast)}
.text-button:hover{color:var(--text)}
.text-button.muted,.muted{color:var(--text-3)}
.btn-busy{pointer-events:none}
.btn-busy::after{content:'';width:14px;height:14px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:spin .7s linear infinite;margin-left:2px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── Sidebar ─────────────────────────────────────────────── */
#sidebar{position:fixed;inset:0 auto 0 0;z-index:30;width:var(--sidebar);display:flex;flex-direction:column;padding:10px 10px 10px;background:var(--bg-sidebar);border-right:1px solid var(--line);overflow:hidden}
.side-top{display:flex;align-items:center;gap:4px;height:40px;min-height:40px;padding:0 2px 0 4px;margin-bottom:8px}
.side-top>.icon-button{flex-shrink:0}
.header-brand{display:inline-flex;align-items:center;gap:1px;height:32px;font-size:17px;font-weight:620;letter-spacing:-.035em;color:var(--text);user-select:none}
.sidebar-brand{margin-left:6px;white-space:nowrap;visibility:hidden;opacity:0}
#closeSidebar svg,#openSidebar svg{transition:transform var(--med) var(--ease-out)}
#closeSidebar:hover svg{transform:translateX(-2px)}
#openSidebar:hover svg{transform:translateX(2px)}
nav{display:flex;flex-direction:column;gap:1px}
.nav{display:flex;align-items:center;gap:10px;width:100%;height:34px;padding:0 10px;border-radius:var(--r-sm);font-size:14px;font-weight:450;color:var(--text-2);text-align:left;transition:background var(--fast),color var(--fast)}
.nav svg{width:18px;height:18px;color:var(--text-3);transition:color var(--fast),transform var(--med) var(--spring)}
.nav:hover{background:var(--surface-2);color:var(--text)}
.nav:hover svg{color:var(--text-2);transform:rotate(-6deg) scale(1.06)}
.nav.active{background:var(--surface-3);color:var(--text)}
.nav.active svg{color:var(--text)}
.nav .nav-kbd{margin-left:auto;display:flex;gap:3px;opacity:0;transition:opacity var(--fast)}
.nav:hover .nav-kbd,.nav:focus-visible .nav-kbd{opacity:1}
.nav .nav-kbd kbd{height:18px;min-width:18px;font-size:10px;background:var(--surface-4)}
.side-scroll{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;margin:0 -6px;padding:0 6px;scrollbar-width:thin;scrollbar-color:transparent transparent;mask-image:linear-gradient(to bottom,transparent 0,#000 12px,#000 calc(100% - 16px),transparent)}
.side-scroll:hover{scrollbar-color:var(--surface-4) transparent}
.section-label{display:flex;align-items:center;justify-content:space-between;height:28px;margin:18px 0 2px;padding:0 4px 0 10px;font-size:12px;font-weight:500;color:var(--text-3)}
.section-label .icon-button{width:24px;height:24px;border-radius:6px;opacity:0;transition:opacity var(--fast),background var(--fast)}
.side-scroll:hover .section-label .icon-button,.section-label .icon-button:focus-visible{opacity:1}
.section-label .icon-button svg{width:14px;height:14px}
.chat-group-label{font-size:11.5px;font-weight:500;color:var(--text-4);padding:12px 10px 4px;letter-spacing:.01em}
.chat-group-label:first-child{padding-top:2px}
.project-link{display:flex;align-items:center;gap:10px;width:100%;height:32px;padding:0 10px;border-radius:var(--r-sm);font-size:13.5px;color:var(--text-2);text-align:left;transition:background var(--fast),color var(--fast)}
.project-link span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.project-link svg{width:16px;height:16px;color:var(--text-3)}
.project-link:hover{background:var(--surface-2);color:var(--text)}
.project-link.selected{background:var(--surface-3);color:var(--text)}
.chat-row{position:relative;display:flex;align-items:center;height:32px;border-radius:var(--r-sm);transition:background var(--fast)}
.chat-row:hover,.chat-row:focus-within,.chat-row.menu-open{background:var(--surface-2)}
.chat-row.selected{background:var(--surface-3)}
.chat-row.selected::before{content:'';position:absolute;left:-6px;top:9px;bottom:9px;width:2px;border-radius:2px;background:var(--accent)}
.chat-link{flex:1;min-width:0;display:flex;align-items:center;height:100%;padding:0 4px 0 10px;font-size:13.5px;color:var(--text-2);transition:color var(--fast)}
.chat-row:hover .chat-link,.chat-row.selected .chat-link{color:var(--text)}
.chat-link span{display:block;overflow:hidden;white-space:nowrap;mask-image:linear-gradient(90deg,#000 calc(100% - 22px),transparent)}
.chat-pin{display:flex;color:var(--text-4);padding-right:2px}
.chat-pin svg{width:13px;height:13px}
.chat-more{width:26px;height:26px;margin-right:3px;border-radius:6px;opacity:0;transition:opacity var(--fast),background var(--fast)}
.chat-more svg{width:16px;height:16px}
.chat-more>span:empty{display:none}
.chat-row:hover .chat-more,.chat-row.menu-open .chat-more,.chat-more:focus-visible{opacity:1}
.chat-more:hover,.chat-more[aria-expanded=true]{background:var(--surface-4)}
.chat-row.menu-open .chat-pin,.chat-row:hover .chat-pin{display:none}
.side-empty{padding:6px 10px;font-size:13px;color:var(--text-4)}
.subtle{width:100%;height:30px;padding:0 10px;margin-top:2px;text-align:left;font-size:13px;color:var(--text-3);border-radius:var(--r-sm);display:flex;align-items:center;gap:6px;transition:color var(--fast),background var(--fast)}
.subtle:hover{color:var(--text);background:var(--surface-2)}
.side-footer{padding-top:8px;margin-top:6px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.usage-card{display:block;width:100%;text-align:left;padding:10px 10px 11px;border-radius:var(--r-md);transition:background var(--fast)}
.usage-card:hover{background:var(--surface-2)}
.usage-top{display:flex;align-items:baseline;justify-content:space-between;font-size:12.5px;color:var(--text-2)}
.usage-top strong{font-weight:550;color:var(--text)}
.usage-top span{font-variant-numeric:tabular-nums;color:var(--text-3)}
.meter{display:block;height:4px;margin-top:8px;border-radius:4px;background:var(--surface-4);overflow:hidden}
.meter>i{display:block;height:100%;width:var(--fill,0%);border-radius:inherit;background:linear-gradient(90deg,var(--text-2),var(--text));transition:width .9s var(--ease-out)}
.meter.is-high>i{background:linear-gradient(90deg,var(--warn),#ffd98f)}
.profile{display:flex;align-items:center;gap:10px;width:100%;height:44px;padding:0 6px;border-radius:var(--r-md);text-align:left;transition:background var(--fast)}
.profile:hover{background:var(--surface-2)}
.profile-text{display:flex;flex-direction:column;min-width:0;line-height:1.25}
.profile-text #profileName{font-size:13.5px;font-weight:500;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.profile-text small{font-size:11.5px;color:var(--text-3)}
.profile>span:last-child{margin-left:auto;color:var(--text-4);transition:transform var(--slow) var(--ease-out),color var(--fast)}
.profile:hover>span:last-child{color:var(--text-2);transform:rotate(60deg)}
.avatar{width:28px;height:28px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;font-size:12px;font-weight:600;color:#111;background:linear-gradient(140deg,#f4f3ee,#b9b8b1);box-shadow:inset 0 0 0 1px rgba(255,255,255,.4)}
#backdrop{display:none}

/* ── Main column & header ───────────────────────────────── */
main{margin-left:var(--sidebar);height:100dvh;display:flex;flex-direction:column;min-width:0;overflow:hidden;--document-offset:0px}
body.document-open main{--document-offset:44vw}
main>header{position:relative;z-index:5;height:52px;flex-shrink:0;display:flex;align-items:center;gap:8px;padding:0 12px}
.header-start{display:flex;align-items:center;gap:0}
body.sidebar-motion-ready .header-start #openSidebar{display:grid;padding:0;overflow:hidden;flex-shrink:0}
.header-start .header-brand{margin-left:4px}
#pageTitle{display:flex;align-items:center;gap:6px;min-width:0;margin-left:6px;font-size:13.5px;color:var(--text-2);overflow:hidden}
#pageTitle .crumb{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#pageTitle .crumb-muted{color:var(--text-3)}
#pageTitle .crumb-sep{color:var(--text-4);flex-shrink:0}
#pageTitle .crumb-title{color:var(--text);font-weight:500;border-radius:var(--r-xs);padding:3px 6px;margin:-3px -6px;transition:background var(--fast)}
#pageTitle button.crumb-title:hover{background:var(--surface-3)}
#pageTitle .mode-pill{flex-shrink:0;font-size:11px;font-weight:550;color:var(--text-2);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);border-radius:99px;padding:2px 7px}
body:not(.sidebar-closed) #pageTitle{display:none}
#chatControls{display:flex;gap:2px;margin-left:auto}
.upgrade-wrap{position:relative;margin-left:auto}
header #chatControls:not([hidden])+.upgrade-wrap{margin-left:4px}
.upgrade-button{display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 12px 0 10px;border-radius:99px;font-size:13px;font-weight:550;color:var(--text);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-2);transition:background var(--fast),box-shadow var(--fast)}
.upgrade-button svg{width:15px;height:15px;color:var(--accent);transition:transform var(--slow) var(--spring)}
.upgrade-button:hover{background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-3)}
.upgrade-button:hover svg{transform:rotate(-14deg) scale(1.15)}
.upgrade-peek{position:absolute;right:0;top:calc(100% + 8px);width:268px;padding:14px;border-radius:var(--r-lg);background:var(--overlay);box-shadow:var(--shadow-pop);opacity:0;transform:translateY(-4px) scale(.98);transform-origin:top right;pointer-events:none;transition:opacity var(--med) var(--ease-out),transform var(--med) var(--ease-out);z-index:40}
.upgrade-wrap:hover .upgrade-peek,.upgrade-wrap:focus-within .upgrade-peek{opacity:1;transform:none;transition-delay:250ms}
.upgrade-peek h4{margin:0 0 2px;font-size:13px;font-weight:600}
.upgrade-peek p{margin:0 0 10px;font-size:12px;color:var(--text-3)}
.upgrade-peek ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.upgrade-peek li{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--text-2)}
.upgrade-peek li svg{width:14px;height:14px;color:var(--text-2)}

/* ── Chat page ──────────────────────────────────────────── */
.page{flex:1;min-height:0}
.chat-page{position:relative;display:grid;grid-template-rows:minmax(0,1fr) auto;min-height:0;overflow:hidden}
#conversation{min-height:0;overflow-y:auto;padding:20px 24px 40px;scrollbar-gutter:stable both-edges;scrollbar-width:thin;scrollbar-color:var(--surface-4) transparent;overscroll-behavior:contain;-webkit-mask-image:linear-gradient(to bottom,#000 calc(100% - 28px),transparent);mask-image:linear-gradient(to bottom,#000 calc(100% - 28px),transparent)}
#messageList{width:100%;max-width:var(--reading-width);margin:0 auto}
.chat-message{position:relative;font-size:15.5px;line-height:1.72;overflow-wrap:anywhere}
.chat-message.is-new{animation:message-in var(--slow) var(--ease-out) both}
@keyframes message-in{from{opacity:0;transform:translateY(6px)}}
#messageList>.chat-message{margin:0 0 30px}
#messageList>.chat-message:last-child{margin-bottom:8px}
#messageList>.chat-message.user{width:fit-content;max-width:min(82%,600px);margin:6px 0 30px auto;padding:10px 16px;border-radius:20px 20px 6px 20px;background:var(--surface-3);line-height:1.6;font-size:15px}
.chat-message.user .message-content>:first-child{margin-top:0}.chat-message.user .message-content>:last-child{margin-bottom:0}
.chat-message.user .file-chip{margin-top:8px}
.chat-message p{margin:0 0 .9em}
.chat-message p:last-child{margin-bottom:0}
.chat-message strong{font-weight:620;color:#f6f6f3}
.chat-message h1,.chat-message h2,.chat-message h3,.chat-message h4{font-size:1.06em;font-weight:620;letter-spacing:-.012em;line-height:1.4;margin:1.5em 0 .55em;color:#f6f6f3}
.chat-message h1{font-size:1.25em}.chat-message h2{font-size:1.14em}
.chat-message .message-content>:first-child{margin-top:0}
.chat-message ul,.chat-message ol{padding-left:1.35em;margin:.2em 0 1em}
.chat-message li{margin:.32em 0;padding-left:.2em}
.chat-message li::marker{color:var(--text-3)}
.chat-message a{color:var(--text);text-decoration:underline;text-decoration-color:var(--text-4);text-underline-offset:3px;transition:text-decoration-color var(--fast)}
.chat-message a:hover{text-decoration-color:var(--text)}
.chat-message blockquote{margin:1em 0;padding:2px 0 2px 16px;border-left:2px solid var(--accent);color:var(--text-2)}
.chat-message hr{border:0;height:1px;background:var(--line-2);margin:1.6em 0}
.chat-message code{font-family:var(--font-mono);font-size:.86em;background:var(--surface-3);padding:.15em .38em;border-radius:5px}
.code-block{margin:1em 0 1.2em;border-radius:var(--r-lg);background:#0e0e0d;box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.code-head{display:flex;align-items:center;justify-content:space-between;height:36px;padding:0 6px 0 14px;font-family:var(--font-mono);font-size:11.5px;color:var(--text-3);border-bottom:1px solid var(--line)}
.code-copy{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 8px;border-radius:6px;font-family:var(--font-sans);font-size:12px;color:var(--text-3);transition:background var(--fast),color var(--fast)}
.code-copy:hover{background:var(--surface-3);color:var(--text)}
.code-copy svg{width:14px;height:14px}
.chat-message pre{margin:0;padding:14px 16px;overflow:auto;font-family:var(--font-mono);font-size:13px;line-height:1.65;scrollbar-width:thin}
.chat-message pre code{background:none;padding:0;font-size:inherit}
.chat-message table{display:block;width:fit-content;max-width:100%;overflow:auto;border-collapse:separate;border-spacing:0;margin:1em 0 1.3em;font-size:14px;border-radius:var(--r-md);box-shadow:inset 0 0 0 1px var(--line-2)}
.chat-message th,.chat-message td{padding:8px 14px;text-align:left;border-bottom:1px solid var(--line)}
.chat-message th{font-weight:550;color:var(--text-2);background:var(--surface);font-size:13px}
.chat-message tr:last-child td{border-bottom:0}
.chat-message td{font-variant-numeric:tabular-nums}
.chat-message .katex{font-size:1.1em}
.chat-message .katex-display{overflow-x:auto;overflow-y:hidden;padding:6px 0;margin:.9em 0}
.message-actions{display:flex;gap:2px;margin-top:10px;opacity:0;transform:translateY(-2px);transition:opacity var(--med),transform var(--med) var(--ease-out)}
.chat-message.assistant:hover .message-actions,.chat-message.assistant:focus-within .message-actions,.chat-message.assistant:last-child .message-actions{opacity:1;transform:none}
.message-actions .icon-button{width:30px;height:30px}
.message-actions .icon-button svg{width:16px;height:16px}
.copied svg{color:var(--success)}
.icon-swap{position:relative;display:grid;place-items:center}
.icon-swap>svg{grid-area:1/1;transition:opacity var(--med),transform var(--med) var(--spring)}
.icon-swap>svg:last-child{opacity:0;transform:scale(.4)}
.copied .icon-swap>svg:first-child{opacity:0;transform:scale(.4)}
.copied .icon-swap>svg:last-child{opacity:1;transform:none}
.chat-message.incomplete{opacity:.7}
.streaming .message-content>:last-child::after{content:'';display:inline-block;width:7px;height:7px;margin-left:5px;border-radius:50%;background:var(--text);vertical-align:.1em;animation:caret-pulse 1s var(--ease-io) infinite}
@keyframes caret-pulse{50%{transform:scale(.55);opacity:.45}}
.thinking{display:flex;align-items:center;gap:10px;max-width:var(--reading-width);margin:0 auto 8px;padding:6px 0;font-size:14.5px;color:var(--text-2);animation:message-in var(--slow) var(--ease-out) both}
.orb-host{width:20px;height:20px;display:grid;place-items:center;flex-shrink:0}
.orb-host canvas{display:block}
.orb-fallback{width:8px;height:8px;border-radius:50%;background:var(--text-2);animation:caret-pulse 1.2s var(--ease-io) infinite}
.shiny-text{display:inline-block;font-weight:500;background-image:linear-gradient(90deg,var(--text-3) 0%,var(--text-3) 38%,var(--text) 50%,var(--text-3) 62%,var(--text-3) 100%);background-size:220% 100%;background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:shine 2.4s linear infinite}
@keyframes shine{from{background-position:110% 0}to{background-position:-110% 0}}
.thinking-time{font-size:12.5px;color:var(--text-4);font-variant-numeric:tabular-nums}
.file-chip{display:inline-flex;align-items:center;gap:8px;max-width:100%;height:34px;padding:0 10px 0 6px;margin:0 6px 6px 0;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-2);font-size:12.5px;color:var(--text-2);transition:background var(--fast),box-shadow var(--fast)}
.file-chip:hover{background:var(--surface-3);color:var(--text)}
.file-chip>svg:first-child{width:22px;height:22px;padding:3px;border-radius:6px;background:var(--danger-soft);color:var(--danger)}
.file-chip>span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;max-width:220px}
.file-chip>svg:last-child:not(:first-child){width:14px;height:14px;color:var(--text-3);margin-left:2px}
.reply-error{display:flex;align-items:center;gap:10px;width:fit-content;max-width:100%;margin:0 auto 10px;padding:7px 8px 7px 12px;border-radius:99px;background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-2);font-size:13px;color:var(--text-2);animation:message-in var(--med) var(--ease-out)}
.reply-error::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--warn);flex-shrink:0}
.reply-error button{height:26px;padding:0 10px;border-radius:99px;font-size:12.5px;font-weight:550;color:var(--text);background:var(--surface-4);transition:background var(--fast)}
.reply-error button:hover{background:var(--line-3)}

/* Composer */
.composer-wrap{position:relative;width:min(calc(var(--prompt-width) + 48px),100%);margin:0 auto;padding:6px 24px 14px;align-self:end}
.composer{position:relative;z-index:1;display:block;padding:18px 12px 12px;border-radius:var(--r-2xl);background:var(--surface-2);box-shadow:inset 0 1px 0 var(--line-3),inset 0 0 0 1px var(--line),0 8px 24px -16px rgba(0,0,0,.65)}
.composer::after{content:'';position:absolute;inset:0;border-radius:inherit;box-shadow:inset 0 0 0 1px var(--line-3),0 0 0 3px rgba(255,255,255,.025);opacity:0;pointer-events:none;transition:opacity var(--med) var(--ease-out)}
.composer:focus-within::after{opacity:1}
.composer textarea{display:block;width:100%;min-height:54px;max-height:220px;padding:0 8px 12px;border:0;outline:0;resize:none;background:none;font-size:15.5px;line-height:1.6;color:var(--text);caret-color:var(--accent);scrollbar-width:thin;scrollbar-color:var(--surface-4) transparent}
.composer textarea::placeholder{color:var(--text-3)}
.composer-bottom{display:flex;align-items:center;gap:10px;min-height:40px}
.attachment-picker{position:relative;flex-shrink:0;z-index:21}
.attachment-trigger{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:36px;padding:0 12px 0 10px;border-radius:999px;font-size:13px;font-weight:500;color:var(--text-2);background:var(--surface-3);box-shadow:inset 0 1px 0 var(--line);transition:background var(--fast),color var(--fast),transform var(--fast) var(--ease-out)}
.attachment-trigger svg{width:16px;height:16px;transition:transform var(--med) var(--ease-out)}
.attachment-trigger:hover:enabled,.attachment-trigger[aria-expanded=true]{color:var(--text);background:var(--surface-4)}
.attachment-trigger[aria-expanded=true] svg{transform:rotate(45deg)}
.attachment-trigger:active:enabled{transform:scale(.96)}
.attachment-trigger:disabled{opacity:.4}
.attachment-menu{position:absolute;left:0;bottom:calc(100% + 12px);width:246px;max-width:calc(100vw - 48px);padding:6px;border-radius:var(--r-xl);background:var(--overlay);box-shadow:var(--shadow-pop);transform-origin:bottom left;animation:attachment-in var(--med) var(--ease-out)}
.attachment-picker.open-below .attachment-menu{bottom:auto;top:calc(100% + 12px);transform-origin:top left}
.attachment-menu>button{display:flex;flex-direction:column;align-items:flex-start;gap:2px;width:100%;padding:11px 12px;border-radius:12px;text-align:left;transition:background var(--fast)}
.attachment-menu>button:hover:enabled,.attachment-menu>button:focus-visible{background:var(--surface-3);outline:none}
.attachment-menu strong{font-size:13px;font-weight:550;color:var(--text)}
.attachment-menu small{font-size:12px;color:var(--text-3)}
.attachment-menu>button:disabled{opacity:.4}
@keyframes attachment-in{from{opacity:0;transform:translateY(4px) scale(.98)}}
#pendingFiles:not(:empty){display:flex;flex-wrap:wrap;gap:6px;margin:0 8px 14px}
#pendingFiles .file-chip{margin:0;height:36px;border-radius:12px;background:var(--surface-3);box-shadow:none;animation:chip-in var(--slow) var(--spring) both}
#pendingFiles .file-chip>svg:first-child{background:none;color:var(--text-2)}
#pendingFiles .file-chip:hover{background:var(--surface-4)}
@keyframes chip-in{from{opacity:0;transform:scale(.9) translateY(4px)}}
.send{position:relative;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;flex-shrink:0;color:var(--accent-ink);background:var(--accent);box-shadow:inset 0 1px 0 rgba(255,255,255,.65),0 2px 5px rgba(0,0,0,.2);transition:transform var(--fast) var(--ease-out),background var(--fast),color var(--fast)}
.send:hover:enabled{background:#fff;transform:translateY(-1px)}
.send:active:enabled{transform:scale(.95)}
.send:disabled,.send.is-empty:not(.is-generating){opacity:1;color:var(--text-3);background:var(--surface-3);box-shadow:inset 0 1px 0 var(--line)}
.send svg{width:18px;height:18px;transition:opacity var(--med),transform var(--med) var(--spring)}
.send .send-stop{position:absolute;opacity:0;transform:scale(.4) rotate(-90deg)}
.send.is-generating svg:first-of-type{opacity:0;transform:scale(.4) translateY(-6px)}
.send.is-generating .send-stop{opacity:1;transform:none}
.beam-host{position:absolute;inset:0;z-index:2;pointer-events:none;border-radius:inherit}
.composer-note{margin:8px 0 0;text-align:center;font-size:11.5px;color:var(--text-4)}
body.home-screen .composer-note{display:none}
.drop-overlay{position:absolute;inset:8px;z-index:20;display:grid;place-items:center;border-radius:var(--r-2xl);background:rgba(19,19,18,.82);backdrop-filter:blur(6px);box-shadow:inset 0 0 0 1.5px var(--line-3);pointer-events:none;opacity:0;transform:scale(.985);transition:opacity var(--med),transform var(--med) var(--ease-out)}
.drop-overlay.is-active{opacity:1;transform:none}
.drop-overlay div{display:grid;justify-items:center;gap:10px;text-align:center}
.drop-overlay svg{width:30px;height:30px;color:var(--text);animation:float 1.6s var(--ease-io) infinite}
.drop-overlay strong{font-size:15px;font-weight:600}
.drop-overlay span{font-size:12.5px;color:var(--text-3)}
@keyframes float{50%{transform:translateY(-5px)}}

/* Mode picker (effort-style selector) */
.mode-picker{position:relative;margin-left:auto;z-index:20}
.mode-trigger{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 10px 0 12px;border-radius:99px;font-size:13px;font-weight:550;color:var(--text-2);transition:background var(--fast),color var(--fast)}
.mode-trigger:hover:enabled,.mode-trigger[aria-expanded=true]{background:var(--surface-3);color:var(--text)}
.mode-trigger:disabled{opacity:.5}
#modeLabel{display:inline-block;animation:label-swap var(--slow) var(--ease-out)}
@keyframes label-swap{from{opacity:0;transform:translateY(5px);filter:blur(2px)}}
body.learn-mode .mode-trigger{color:var(--text)}
body.learn-mode .mode-trigger::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);margin-right:2px}
.mode-chevron{width:14px;height:14px;transition:transform var(--med) var(--ease-out)}
.mode-trigger[aria-expanded=true] .mode-chevron{transform:rotate(180deg)}
.mode-menu{position:absolute;right:-8px;bottom:calc(100% + 10px);width:288px;max-width:calc(100vw - 32px);padding:6px;border-radius:var(--r-xl);background:var(--overlay);box-shadow:var(--shadow-pop);transform-origin:bottom right;animation:pop-in var(--med) var(--ease-out)}
.mode-picker.open-below .mode-menu{bottom:auto;top:calc(100% + 8px);transform-origin:top right}
@keyframes pop-in{from{opacity:0;transform:scale(.96) translateY(4px)}}
.mode-menu>button{display:flex;align-items:center;gap:12px;width:100%;padding:10px 10px;border-radius:var(--r-md);text-align:left;color:var(--text);transition:background var(--fast)}
.mode-menu>button:hover,.mode-menu>button:focus-visible{background:var(--surface-3);outline:none}
.mode-menu>button>span{display:flex;flex-direction:column;min-width:0}
.mode-menu strong{font-size:13.5px;font-weight:550}
.mode-menu small{font-size:12.5px;color:var(--text-3);margin-top:1px}
.mode-check{width:18px;height:18px;color:var(--text-3);transition:transform var(--slow) var(--spring),color var(--fast)}
.mode-menu [aria-checked=true] .mode-check{color:var(--accent);animation:check-pop var(--slow) var(--spring)}
@keyframes check-pop{0%{transform:scale(.3) rotate(-25deg)}100%{transform:none}}
.mode-menu-footer{display:flex;align-items:center;justify-content:space-between;margin:4px 4px 0;padding:10px 6px 4px 6px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-3)}
.mode-thinking{display:inline-flex;align-items:center;gap:4px;font-weight:550;color:var(--text-2)}
.mode-thinking i{display:inline-block;width:3px;border-radius:2px;background:currentColor}
.mode-thinking i:nth-child(1){height:6px}.mode-thinking i:nth-child(2){height:9px}.mode-thinking i:nth-child(3){height:12px}

/* Home */
.home-intro{text-align:center;padding:0 24px;margin:0 0 26px}
.home-intro h1{margin:0;font-family:var(--font-serif);font-weight:400;font-size:clamp(34px,3.6vw,46px);line-height:1.12;letter-spacing:-.01em;color:var(--text);animation:greet-in .7s var(--ease-out) both}
.home-intro h1 em{font-style:italic;color:var(--text-2)}
.home-intro p{margin:10px 0 0;font-size:14.5px;color:var(--text-3);animation:greet-in .7s .08s var(--ease-out) both}
@keyframes greet-in{from{opacity:0;transform:translateY(10px);filter:blur(4px)}}
body.home-screen .chat-page{display:flex;flex-direction:column;justify-content:center;padding-bottom:clamp(40px,10vh,120px)}
body.home-screen #conversation{display:none}
body.home-screen .composer-wrap{align-self:center;padding-top:0}
body.home-screen #chatControls{display:none}
.suggestions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;max-width:calc(var(--prompt-width) + 48px);margin:14px auto 0;padding:0 24px}
body:not(.home-screen) .suggestions{display:none}
.suggestion{display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 13px 0 11px;border-radius:99px;font-size:13px;color:var(--text-2);background:transparent;box-shadow:inset 0 0 0 1px var(--line-2);transition:background var(--fast),color var(--fast),box-shadow var(--fast),transform var(--med) var(--ease-out);animation:greet-in .6s var(--ease-out) both}
.suggestion:nth-child(2){animation-delay:.05s}.suggestion:nth-child(3){animation-delay:.1s}.suggestion:nth-child(4){animation-delay:.15s}
.suggestion svg{width:15px;height:15px;color:var(--text-3);transition:color var(--fast),transform var(--med) var(--spring)}
.suggestion:hover{background:var(--surface-2);color:var(--text);box-shadow:inset 0 0 0 1px var(--line-3);transform:translateY(-1px)}
.suggestion:hover svg{color:var(--text);transform:scale(1.12)}

/* ── Content pages ──────────────────────────────────────── */
.content-page{overflow:auto;padding:28px max(28px,calc((100% - 880px)/2)) 64px;scrollbar-width:thin;scrollbar-color:var(--surface-4) transparent;animation:page-in var(--slow) var(--ease-out)}
@keyframes page-in{from{opacity:0;transform:translateY(6px)}}
.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.page-heading h1{margin:0 0 6px;font-size:26px;font-weight:620;letter-spacing:-.025em}
.page-heading p,.description{margin:0;font-size:14px;line-height:1.6;color:var(--text-3)}
.page-heading .page-actions{display:flex;gap:8px}
.filter-tabs{display:flex;gap:2px;padding:3px;margin-bottom:16px;width:fit-content;border-radius:var(--r-md);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line)}
.filter-tabs button{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 11px;border-radius:7px;font-size:13px;color:var(--text-3);transition:color var(--fast),background var(--fast)}
.filter-tabs button:hover{color:var(--text)}
.filter-tabs button[aria-pressed=true]{background:var(--surface-3);color:var(--text);box-shadow:var(--shadow-raise)}
.filter-tabs .count{font-size:11px;font-variant-numeric:tabular-nums;color:var(--text-4)}
.list{border-radius:var(--r-lg);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.file-row,.list-row{position:relative;display:flex;align-items:center;gap:12px;width:100%;min-height:58px;padding:10px 12px 10px 14px;text-align:left;border-bottom:1px solid var(--line);transition:background var(--fast);animation:row-in var(--slow) var(--ease-out) both}
.list>:last-child{border-bottom:0}
.file-row:hover,.list-row:hover{background:var(--surface-2)}
@keyframes row-in{from{opacity:0;transform:translateY(4px)}}
.file-tile{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;flex-shrink:0;background:var(--surface-3);color:var(--text-2)}
.file-tile svg{width:18px;height:18px}
.file-tile.kind-paper{background:rgba(255,138,122,.12);color:#ffa597}
.file-tile.kind-mark-scheme{background:rgba(134,220,160,.12);color:#9ee3b1}
.file-tile.kind-working{background:rgba(243,200,109,.12);color:#f6d48d}
.file-tile.kind-resource{background:rgba(150,170,255,.12);color:#aab9ff}
.file-row>div,.list-row>div{flex:1;min-width:0}
.file-row strong,.list-row strong{display:block;font-size:14px;font-weight:500;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.file-row small,.list-row small{display:block;margin-top:2px;font-size:12.5px;color:var(--text-3)}
.row-actions{display:flex;gap:4px;opacity:0;transform:translateX(4px);transition:opacity var(--med),transform var(--med) var(--ease-out)}
.file-row:hover .row-actions,.file-row:focus-within .row-actions,.list-row:hover .row-actions,.list-row:focus-within .row-actions{opacity:1;transform:none}
.row-actions .secondary,.row-actions .ghost,.row-actions .primary{height:30px;padding:0 11px;font-size:12.5px}
.list-row .row-meta{font-size:12.5px;color:var(--text-4);font-variant-numeric:tabular-nums;white-space:nowrap}
.list-row>svg{color:var(--text-3)}
.dropzone{display:flex;align-items:center;gap:14px;width:100%;padding:16px 18px;margin-bottom:16px;border-radius:var(--r-lg);text-align:left;color:var(--text-2);background:repeating-linear-gradient(135deg,transparent 0 9px,rgba(255,255,255,.012) 9px 18px);box-shadow:inset 0 0 0 1px var(--line-2);transition:box-shadow var(--med),background var(--med)}
.dropzone:hover,.dropzone.is-over{box-shadow:inset 0 0 0 1.5px var(--line-3);background-color:var(--accent-soft)}
.dropzone .file-tile{background:var(--surface-3);color:var(--text)}
.dropzone strong{display:block;font-size:14px;font-weight:550;color:var(--text)}
.dropzone small{font-size:12.5px;color:var(--text-3)}
.dropzone:hover .file-tile svg{animation:float 1.4s var(--ease-io) infinite}
.empty-state{display:grid;justify-items:center;gap:4px;margin-top:8px;padding:44px 20px 48px;border-radius:var(--r-lg);text-align:center;font-size:13.5px;color:var(--text-3);box-shadow:inset 0 0 0 1px var(--line);background:radial-gradient(400px 160px at 50% 0%,rgba(255,255,255,.03),transparent)}
.empty-art{position:relative;width:76px;height:60px;margin-bottom:14px}
.empty-art span{position:absolute;inset:0;border-radius:10px;background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);transition:transform var(--slow) var(--spring)}
.empty-art span:nth-child(1){transform:rotate(-9deg) translate(-14px,4px);background:var(--surface-2)}
.empty-art span:nth-child(2){transform:rotate(7deg) translate(14px,2px);background:var(--surface-2)}
.empty-art span:nth-child(3){display:grid;place-items:center;color:var(--text-2)}
.empty-state:hover .empty-art span:nth-child(1){transform:rotate(-16deg) translate(-24px,0)}
.empty-state:hover .empty-art span:nth-child(2){transform:rotate(14deg) translate(24px,-2px)}
.empty-state:hover .empty-art span:nth-child(3){transform:translateY(-4px)}
.empty-state strong{font-size:15px;font-weight:600;color:var(--text)}
.empty-state>svg{display:none}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.stat{padding:18px 18px 20px;border-radius:var(--r-lg);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);transition:background var(--med),transform var(--med) var(--ease-out)}
.stat:hover{background:var(--surface-2);transform:translateY(-1px)}
.stat>span{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--text-3)}
.stat>span svg{width:15px;height:15px}
.stat strong{display:block;margin-top:14px;font-size:34px;font-weight:560;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1}
.roll{display:inline-flex;overflow:hidden;height:1em;line-height:1}
.roll-digit{display:inline-flex;flex-direction:column;transition:transform 1s var(--ease-out)}
.roll-digit>span{height:1em;line-height:1}
.panel{margin-top:12px;padding:18px;border-radius:var(--r-lg);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line)}
.panel-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.panel-head h2{margin:0;font-size:14px;font-weight:600}
.panel-head span{font-size:12.5px;color:var(--text-3);font-variant-numeric:tabular-nums}
.panel .meter{height:6px;margin-top:14px}
.panel p{margin:12px 0 0;font-size:12.5px;color:var(--text-4)}

/* Settings */
.settings{display:grid;grid-template-columns:168px minmax(0,1fr);gap:40px;align-items:start}
.settings-nav{position:sticky;top:0;display:flex;flex-direction:column;gap:1px}
.settings-nav a{display:flex;align-items:center;gap:9px;height:32px;padding:0 10px;border-radius:var(--r-sm);font-size:13.5px;color:var(--text-3);transition:background var(--fast),color var(--fast)}
.settings-nav a svg{width:16px;height:16px}
.settings-nav a:hover{color:var(--text);background:var(--surface-2)}
.settings-nav a.active{color:var(--text);background:var(--surface-3)}
.section-card{scroll-margin-top:12px;margin-bottom:28px}
.section-card>h2{margin:0 0 4px;font-size:15px;font-weight:600;letter-spacing:-.01em}
.section-card>.section-intro{margin:0 0 12px;font-size:13px;color:var(--text-3)}
.setting-rows{border-radius:var(--r-lg);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line)}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:60px;padding:12px 16px;border-bottom:1px solid var(--line)}
.setting-row:last-child{border-bottom:0}
.setting-row>div:first-child{min-width:0}
.setting-row label,.setting-row .label{display:block;font-size:13.5px;font-weight:500}
.setting-row small{display:block;margin-top:2px;font-size:12.5px;color:var(--text-3)}
.setting-row input:not([type=checkbox]){width:min(300px,100%);height:34px;padding:0 11px;border:0;border-radius:var(--r-sm);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);font-size:13.5px;outline:none;transition:box-shadow var(--fast)}
.setting-row input:focus{box-shadow:inset 0 0 0 1px var(--line-3),0 0 0 3px rgba(255,255,255,.05)}
.setting-row input:disabled{color:var(--text-3)}
.settings-actions{display:flex;justify-content:flex-end;gap:8px;padding:12px 16px;border-top:1px solid var(--line)}
.segmented{position:relative;display:inline-flex;padding:3px;border-radius:var(--r-md);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line)}
.segmented button{position:relative;z-index:1;height:28px;padding:0 12px;font-size:12.5px;font-weight:500;color:var(--text-3);border-radius:7px;transition:color var(--med)}
.segmented button[aria-checked=true]{color:var(--text)}
.segmented .seg-thumb{position:absolute;z-index:0;top:3px;bottom:3px;border-radius:7px;background:var(--surface-4);box-shadow:var(--shadow-raise);transition:left var(--slow) var(--ease-out),width var(--slow) var(--ease-out)}
.status-dot{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-3)}
.status-dot::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--text-4)}
.status-dot.on{color:var(--text-2)}
.status-dot.on::before{background:var(--success);box-shadow:0 0 0 3px var(--success-soft)}
.badge{display:inline-flex;align-items:center;height:20px;padding:0 7px;border-radius:99px;font-size:11px;font-weight:550;color:var(--text-2);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line)}
.badge.warn{color:var(--warn);background:rgba(243,200,109,.1)}
.badge.ok{color:var(--success);background:var(--success-soft)}
.service-row,.form-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.field{display:block;margin-bottom:14px;font-size:13px;font-weight:500;color:var(--text-2)}
.field input,.field select,dialog label input{display:block;width:100%;height:38px;margin-top:6px;padding:0 12px;border:0;border-radius:var(--r-md);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);font-size:14px;color:var(--text);outline:none;transition:box-shadow var(--fast)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 17px) 17px,calc(100% - 12px) 17px;background-size:5px 5px;background-repeat:no-repeat}
.field input:focus,.field select:focus,dialog label input:focus{box-shadow:inset 0 0 0 1px var(--line-3),0 0 0 3px rgba(255,255,255,.05)}
.form-error{margin:4px 0 0;font-size:13px;line-height:1.5;color:var(--danger)}
.form-error:empty{display:none}
.chat-delete-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}

/* ── Overlays ───────────────────────────────────────────── */
dialog{color:var(--text);border:0;padding:22px;border-radius:var(--r-2xl);width:min(440px,calc(100vw - 32px));max-height:90dvh;background:var(--overlay);box-shadow:var(--shadow-pop);opacity:1;transform:none;transition:opacity var(--med) var(--ease-out),transform var(--med) var(--ease-out),overlay var(--med) allow-discrete,display var(--med) allow-discrete}
dialog:not([open]){opacity:0;transform:scale(.97) translateY(6px)}
@starting-style{dialog[open]{opacity:0;transform:scale(.97) translateY(6px)}}
dialog::backdrop{background:rgba(5,5,5,.6);backdrop-filter:blur(3px);opacity:1;transition:opacity var(--med),overlay var(--med) allow-discrete,display var(--med) allow-discrete}
dialog:not([open])::backdrop{opacity:0}
@starting-style{dialog[open]::backdrop{opacity:0}}
.modal-heading{display:flex;align-items:center;justify-content:space-between;margin:-4px -6px 16px 0}
.modal-heading h2{margin:0;font-size:16px;font-weight:600;letter-spacing:-.01em}
#modal .primary{margin-top:6px}
#modal form>.primary{width:100%;height:38px}
.chat-learning-details{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.chat-learning-details h3{margin:0 0 10px;font-size:13px;font-weight:600}

/* Command palette */
dialog.palette{padding:0;width:min(620px,calc(100vw - 24px));top:12vh;margin:0 auto auto;overflow:hidden;border-radius:var(--r-xl)}
.palette-input{display:flex;align-items:center;gap:10px;height:52px;padding:0 14px 0 16px;border-bottom:1px solid var(--line)}
.palette-input svg{color:var(--text-3)}
.palette-input input{flex:1;height:100%;border:0;outline:none;background:none;font-size:15.5px;color:var(--text)}
.palette-input input::placeholder{color:var(--text-4)}
.palette-list{max-height:min(420px,56vh);overflow:auto;padding:6px;scrollbar-width:thin}
.palette-group{padding:8px 10px 4px;font-size:11.5px;font-weight:500;color:var(--text-4)}
.palette-item{display:flex;align-items:center;gap:11px;width:100%;height:40px;padding:0 10px;border-radius:var(--r-md);text-align:left;font-size:14px;color:var(--text-2);scroll-margin:6px}
.palette-item svg{width:17px;height:17px;color:var(--text-3)}
.palette-item>span{flex:1;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.palette-item mark{background:none;color:var(--text);font-weight:600}
.palette-item small{font-size:12px;color:var(--text-4)}
.palette-item[aria-selected=true]{background:var(--surface-3);color:var(--text)}
.palette-item[aria-selected=true] svg{color:var(--text)}
.palette-item .enter{opacity:0;transition:opacity var(--fast)}
.palette-item[aria-selected=true] .enter{opacity:1}
.palette-empty{padding:28px 12px;text-align:center;font-size:13.5px;color:var(--text-3)}
.palette-foot{display:flex;align-items:center;gap:14px;height:38px;padding:0 14px;border-top:1px solid var(--line);font-size:12px;color:var(--text-4)}
.palette-foot span{display:inline-flex;align-items:center;gap:5px}

/* Popover menus */
.chat-context-menu{position:fixed;inset:auto;margin:0;width:220px;padding:5px;border:0;border-radius:var(--r-lg);background:var(--overlay);color:var(--text);box-shadow:var(--shadow-pop);overflow:auto;max-height:calc(100dvh - 16px);opacity:1;transform:none;transition:opacity var(--fast) var(--ease-out),transform var(--fast) var(--ease-out),overlay var(--fast) allow-discrete,display var(--fast) allow-discrete;transform-origin:top left}
.chat-context-menu:not(:popover-open){opacity:0;transform:scale(.96)}
@starting-style{.chat-context-menu:popover-open{opacity:0;transform:scale(.96)}}
.chat-menu-item{display:flex;align-items:center;gap:10px;width:100%;height:34px;padding:0 9px;border-radius:var(--r-sm);text-align:left;font-size:13.5px;color:var(--text-2);white-space:nowrap}
.chat-menu-item svg{width:16px;height:16px;color:var(--text-3);transition:transform var(--med) var(--spring),color var(--fast)}
.chat-menu-item:hover,.chat-menu-item:focus-visible{background:var(--surface-3);color:var(--text);outline:none}
.chat-menu-item:hover svg,.chat-menu-item:focus-visible svg{color:var(--text);transform:scale(1.12) rotate(-6deg)}
.chat-menu-divider{height:1px;margin:4px 6px;background:var(--line)}
.chat-menu-item.destructive,.chat-menu-item.destructive svg{color:var(--danger)}
.chat-menu-item.destructive:hover{background:var(--danger-soft)}

/* Tooltip */
.tooltip{position:fixed;z-index:200;display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:7px;background:#f1f1ee;color:#141413;font-size:12px;font-weight:550;line-height:1.2;pointer-events:none;white-space:nowrap;box-shadow:0 6px 16px rgba(0,0,0,.4);opacity:0;transform:translateY(3px) scale(.97);transition:opacity var(--fast) var(--ease-out),transform var(--fast) var(--ease-out)}
.tooltip.is-visible{opacity:1;transform:none}
.tooltip kbd{background:rgba(0,0,0,.08);color:#555;box-shadow:none;height:17px;min-width:17px;font-size:10.5px}

/* Toasts */
#toast{display:none!important}
.toast-stack{position:fixed;z-index:150;left:50%;bottom:22px;display:grid;justify-items:center;gap:8px;transform:translateX(-50%);pointer-events:none;width:min(440px,calc(100vw - 24px))}
.toast{pointer-events:auto;display:flex;align-items:center;gap:10px;max-width:100%;padding:10px 10px 10px 14px;border-radius:var(--r-lg);background:var(--surface-3);color:var(--text);font-size:13.5px;line-height:1.45;box-shadow:var(--shadow-pop);animation:toast-in var(--slow) var(--spring)}
.toast svg{width:17px;height:17px;color:var(--text-2)}
.toast.success svg{color:var(--success)}.toast.error svg{color:var(--danger)}.toast.warn svg{color:var(--warn)}
.toast-dot{flex:none;width:6px;height:6px;border-radius:50%;background:var(--text-3)}.toast.success .toast-dot{background:var(--success)}.toast.error .toast-dot{background:var(--danger)}.toast.warn .toast-dot{background:var(--warn)}
.toast button{display:grid;place-items:center;width:24px;height:24px;margin-left:4px;border-radius:6px;color:var(--text-3)}
.toast button:hover{background:var(--surface-4);color:var(--text)}
.toast button svg{width:14px;height:14px}
.toast.is-leaving{animation:toast-out var(--med) var(--ease-out) forwards}
@keyframes toast-in{from{opacity:0;transform:translateY(14px) scale(.96)}}
@keyframes toast-out{to{opacity:0;transform:translateY(8px) scale(.97)}}

/* Auth */
.auth-dialog{width:min(400px,calc(100vw - 32px));padding:30px 30px 22px}
.auth-dialog::backdrop{background:radial-gradient(900px 500px at 50% 40%,rgba(255,255,255,.035),transparent 70%),rgba(8,8,8,.92);backdrop-filter:blur(10px)}
.auth-logo{display:flex;align-items:center;justify-content:center;gap:1px;font-size:18px;font-weight:620;letter-spacing:-.035em;margin-bottom:26px}
.auth-dialog h1{margin:0 0 6px;font-family:var(--font-serif);font-weight:400;font-size:34px;line-height:1.1;letter-spacing:-.005em;text-align:center}
.auth-dialog>p{margin:0 0 20px;font-size:14px;line-height:1.55;color:var(--text-3);text-align:center}
.auth-dialog label{display:block;margin:0 0 14px;font-size:13px;font-weight:500;color:var(--text-2)}
.auth-dialog .primary{width:100%;height:40px;margin:8px 0 12px;font-size:14px}
.password-wrap{position:relative}
.password-wrap input{padding-right:42px!important}
.password-toggle{position:absolute;right:4px;bottom:4px;width:30px;height:30px;display:grid;place-items:center;border-radius:7px;color:var(--text-3);transition:color var(--fast),background var(--fast)}
.password-toggle:hover{color:var(--text);background:var(--surface-4)}
.password-toggle svg{width:16px;height:16px;transition:transform var(--med) var(--spring)}
.password-toggle:active svg{transform:scale(.8)}

/* Document panel */
#documentPanel{position:fixed;right:0;top:0;bottom:0;z-index:15;width:44%;display:flex;flex-direction:column;background:var(--bg-sidebar);border-left:1px solid var(--line);animation:panel-in var(--slow) var(--ease-out)}
@keyframes panel-in{from{transform:translateX(24px);opacity:0}}
body.document-open main{margin-right:44%}
.document-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;height:52px;padding:0 10px 0 16px;font-size:13.5px;font-weight:500;border-bottom:1px solid var(--line)}
.document-heading>span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
#documentContent{flex:1;min-height:0}
#documentContent iframe{width:100%;height:100%;border:0;background:var(--surface)}
#documentContent img{width:100%;height:100%;object-fit:contain;padding:16px}

/* Offline */
.net-banner{position:fixed;z-index:160;top:10px;left:50%;display:flex;align-items:center;gap:8px;height:32px;padding:0 12px;border-radius:99px;transform:translate(-50%,-60px);background:var(--surface-3);box-shadow:var(--shadow-pop);font-size:12.5px;color:var(--text-2);transition:transform var(--slow) var(--spring)}
.net-banner.is-visible{transform:translate(-50%,0)}
.net-banner svg{width:15px;height:15px;color:var(--warn)}
.net-banner .orb-fallback{background:var(--warn)}

/* ── Learn mode ─────────────────────────────────────────── */
.learning-card{position:relative;margin-top:18px;padding:20px;border-radius:var(--r-xl);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line-2);line-height:1.6}
.learning-card.border-beam-card{box-shadow:inset 0 0 0 1px var(--line-3),0 0 0 4px rgba(255,255,255,.025)}
.learning-card h3{margin:0 0 14px!important;font-size:17px;font-weight:600;letter-spacing:-.015em}
.learn-question{margin:0 0 14px;font-size:15.5px;font-weight:500;color:var(--text)}
#messageList .learning-card .learn-markdown>:first-child{margin-top:0}
#messageList .learning-card .learn-markdown>:last-child{margin-bottom:0}
.learn-options{display:grid;gap:6px;margin:0 0 4px;counter-reset:opt}
.learn-option{position:relative;display:flex;align-items:center;gap:12px;min-height:48px;padding:10px 12px;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line);font-size:14.5px;cursor:pointer;transition:background var(--fast),box-shadow var(--fast),transform var(--fast) var(--ease-out)}
.learn-option::before{counter-increment:opt;content:counter(opt,upper-alpha);display:grid;place-items:center;flex-shrink:0;width:24px;height:24px;border-radius:6px;font-family:var(--font-mono);font-size:11.5px;font-weight:600;color:var(--text-3);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);transition:background var(--fast),color var(--fast)}
.learn-option:hover{background:var(--surface-3)}
.learn-option:active{transform:scale(.995)}
.learn-option input{position:absolute;opacity:0;pointer-events:none}
.learn-option:has(input:checked){background:var(--accent-soft);box-shadow:inset 0 0 0 1px rgba(255,255,255,.4)}
.learn-option:has(input:checked)::before{background:var(--accent);color:var(--accent-ink);box-shadow:none;animation:check-pop var(--slow) var(--spring)}
.learn-option:has(input:focus-visible){outline:2px solid color-mix(in srgb,var(--accent) 70%,transparent);outline-offset:2px}
.learn-option:has(input:disabled){cursor:default}
.learn-option:has(input:disabled):not(:has(input:checked)):not(.is-correct){opacity:.6}
.learn-option.is-correct{background:var(--success-soft);box-shadow:inset 0 0 0 1px rgba(134,220,160,.45)}
.learn-option.is-correct::before{background:var(--success);color:#062a12}
.learn-option.is-correct::after{content:'Correct';margin-left:auto;font-size:12px;font-weight:550;color:var(--success)}
.learn-option.was-selected:not(.is-correct){background:var(--danger-soft);box-shadow:inset 0 0 0 1px rgba(255,138,122,.4)}
.learn-option.was-selected:not(.is-correct)::after{content:'Your answer';margin-left:auto;font-size:12px;font-weight:550;color:var(--danger)}
.learn-option .learn-markdown{min-width:0}
.learn-note-label{display:block;margin:14px 0 6px;font-size:13px;font-weight:500;color:var(--text-2)}
.learn-note,.learn-custom{display:block;width:100%;margin-top:6px;padding:10px 12px;border:0;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-2);font-size:14px;line-height:1.55;color:var(--text);resize:vertical;max-height:160px;outline:none}
.learn-note:focus,.learn-custom:focus{box-shadow:inset 0 0 0 1px var(--line-3),0 0 0 3px rgba(255,255,255,.04)}
.learn-working{margin:12px 0 0;font-size:13px;color:var(--text-3)}
.learn-working summary{width:fit-content;cursor:pointer;padding:4px 0;list-style:none;display:flex;align-items:center;gap:6px;transition:color var(--fast)}
.learn-working summary::before{content:'';width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(-45deg);transition:transform var(--med) var(--ease-out)}
.learn-working[open] summary::before{transform:rotate(45deg)}
.learn-working summary:hover,.learn-working[open] summary{color:var(--text)}
.learn-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.learn-actions .primary,.learn-actions .secondary{height:36px}
.learn-actions .texture-button{background:var(--text);color:#111110;box-shadow:inset 0 -1px 0 rgba(0,0,0,.18)}
.learn-actions .texture-button:hover:enabled{background:#fff}
.learn-hint{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-4)}
.learn-muted{margin:10px 0 0;font-size:13px;color:var(--text-3)}
.learn-footnote{margin-top:12px;font-size:12px;color:var(--text-4)}
.learn-feedback{margin:14px 0 0;padding:14px 16px;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line);font-size:14px;line-height:1.6;animation:message-in var(--slow) var(--ease-out)}
.learn-feedback strong{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-weight:600}
.learn-feedback strong::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--warn)}
.learn-feedback.is-right strong::before{background:var(--success)}
.learn-feedback.is-wrong strong::before{background:var(--danger)}
.learning-card>.primary,.learn-follow-up .secondary{margin-top:14px}
.learn-follow-up{margin-top:14px}
.learn-map{list-style:none;margin:4px 0 16px;padding:0;counter-reset:concept}
.learn-map li{position:relative;padding:11px 0 11px 36px;font-size:14px;border-bottom:1px solid var(--line)}
.learn-map li:last-child{border-bottom:0}
.learn-map li::before{counter-increment:concept;content:counter(concept);position:absolute;left:0;top:9px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;font-size:11.5px;font-weight:600;color:var(--text-2);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2)}
.learn-map li:not(:last-child)::after{content:'';position:absolute;left:11.5px;top:34px;bottom:-9px;width:1px;background:var(--line-2)}
.learn-map strong{font-weight:500}
.learn-plot{margin:14px 0;padding:12px;border-radius:var(--r-md);background:#0e0e0d;box-shadow:inset 0 0 0 1px var(--line)}
.learn-plot svg{width:100%;height:auto}
.learn-plot text{fill:var(--text-3);font-size:10px;font-family:var(--font-mono)}
.learn-plot .plot-grid{stroke:rgba(255,255,255,.05);stroke-width:1}
.learn-plot .plot-axis{stroke:var(--text-4);stroke-width:1}
.learn-plot .plot-curve{stroke:var(--text);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-dasharray:2000;animation:draw 1.4s var(--ease-out) both}
@keyframes draw{from{stroke-dashoffset:2000}}
.learn-plot .learn-markdown{margin:4px 0 0;font-size:13px;color:var(--text-3);text-align:center}
.learn-outline summary{display:flex;align-items:center;gap:10px;cursor:pointer;list-style:none;font-size:13px;color:var(--text-2)}
.learn-outline summary::-webkit-details-marker{display:none}
.learn-outline-content{max-height:240px;overflow:auto;padding:8px 2px 4px;scrollbar-width:thin}
.learn-outline-content ol{margin:0;padding-left:20px;font-size:13px;color:var(--text-3);line-height:2}
.learn-outline-content .current-concept{color:var(--text);font-weight:600}
.learn-outline-content h4{margin:12px 0 4px;font-size:12px;font-weight:600;color:var(--text-2)}
.learn-stage{display:inline-flex;align-items:center;height:20px;padding:0 8px;border-radius:99px;font-size:11px;font-weight:600;color:var(--text-2);background:var(--surface-3)}

/* ── Subscription dialog ────────────────────────────────── */
dialog.subscription-dialog{width:min(1180px,calc(100vw - 40px));max-height:92dvh;padding:0;border-radius:var(--r-2xl);overflow:auto;scrollbar-width:none;overscroll-behavior:contain}
dialog.subscription-dialog::-webkit-scrollbar{display:none}
.subscription-shell{padding:26px 24px 20px}
.subscription-header{position:relative;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:4px 4px 22px}
.subscription-intro h1{margin:0;font-family:var(--font-serif);font-weight:400;font-size:36px;line-height:1.1}
.subscription-intro p{margin:8px 0 0;font-size:14px;color:var(--text-3)}
.subscription-controls{display:flex;align-items:center;gap:12px;margin-right:36px}
.annual-saving{font-size:12px;font-weight:550;color:var(--text-2)}
.billing-periods{position:relative;display:flex;padding:3px;border-radius:99px;background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line)}
.billing-periods button{height:28px;padding:0 14px;border-radius:99px;font-size:12.5px;font-weight:550;color:var(--text-3);transition:background var(--med),color var(--med)}
.billing-periods [aria-pressed=true]{background:var(--surface-4);color:var(--text);box-shadow:var(--shadow-raise)}
.subscription-close{position:absolute;right:-6px;top:-8px;width:32px;height:32px;display:grid;place-items:center;border-radius:var(--r-sm);color:var(--text-3);transition:background var(--fast),color var(--fast)}
.subscription-close:hover{background:var(--surface-3);color:var(--text)}
.subscription-status{margin:0 0 14px;padding:10px 14px;border-radius:var(--r-md);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);font-size:13px;color:var(--text-2)}
.subscription-status.is-error{color:var(--danger)}
.billing-verify{text-decoration:underline;text-underline-offset:3px;color:var(--text)}
.subscription-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.subscription-card{position:relative;display:flex;flex-direction:column;min-width:0;padding:20px;border-radius:var(--r-xl);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);transition:transform var(--med) var(--ease-out),box-shadow var(--med)}
.subscription-card:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px var(--line-2)}
.subscription-card.recommended{background:linear-gradient(180deg,rgba(255,255,255,.04),transparent 40%),var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-3)}
.subscription-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:22px;margin-bottom:18px}
.subscription-card h2{margin:0;font-size:14px;font-weight:600}
.subscription-badge{height:20px;padding:0 8px;display:inline-flex;align-items:center;border-radius:99px;font-size:11px;font-weight:600;color:#141413;background:linear-gradient(135deg,#f4f4f1,#b8b8b2)}
.subscription-badge.current-badge{color:var(--text-2);background:var(--surface-3)}
.subscription-price{display:flex;align-items:baseline;gap:4px}
.subscription-price strong{font-size:38px;font-weight:580;letter-spacing:-.035em;line-height:1;font-variant-numeric:tabular-nums}
.subscription-price>span{font-size:13px;color:var(--text-3)}
.subscription-charge{min-height:18px;margin:8px 0 18px;font-size:12.5px;color:var(--text-3)}
.subscription-action{width:100%;height:36px;border-radius:var(--r-md);font-size:13px;font-weight:550;color:var(--text);background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);transition:background var(--fast),transform var(--fast)}
.subscription-action:hover:enabled{background:var(--surface-4)}
.subscription-action:active:enabled{transform:scale(.98)}
.subscription-action.prominent{background:var(--text);color:#111110;box-shadow:none}
.subscription-action.prominent:hover:enabled{background:#fff}
.subscription-action:disabled{color:var(--text-3);cursor:default}
.subscription-action.prominent:disabled{background:var(--surface-4);color:var(--text-3)}
.subscription-tagline{margin:20px 0 6px;font-size:12.5px;color:var(--text-3)}
.subscription-headline{margin:0 0 12px;font-size:19px;font-weight:600;letter-spacing:-.02em}
.subscription-allowance{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px}
.subscription-allowance strong{font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.subscription-allowance span{font-size:12.5px;color:var(--text-3)}
.subscription-description{min-height:36px;margin:8px 0 18px;font-size:12.5px;color:var(--text-3)}
.subscription-features{margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}
.subscription-features h4{margin:0 0 10px;font-size:12px;font-weight:600;color:var(--text-3)}
.subscription-features ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.subscription-features li{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--text-2)}
.subscription-features svg{width:15px;height:15px;margin-top:1px;color:var(--text-3)}
.subscription-card.recommended .subscription-features svg{color:var(--text)}
.subscription-footer{padding:16px 4px 0}
.subscription-footer p{margin:0;font-size:12px;color:var(--text-4)}

/* ── Sidebar motion integration & responsive ────────────── */
body.sidebar-motion-ready #sidebar,body.sidebar-motion-ready main{transition:none}
body.sidebar-closed #openSidebar{display:grid}
body.auth-pending main,body.auth-pending #sidebar{visibility:hidden}
@media(max-width:1100px){.subscription-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.subscription-header{flex-direction:column;align-items:flex-start}.subscription-controls{margin-right:0}}
@media(max-width:1000px){body.document-open main{margin-right:0;--document-offset:0px}#documentPanel{width:65%}.settings{grid-template-columns:1fr;gap:16px}.settings-nav{position:static;flex-direction:row;overflow:auto}}
@media(max-width:740px){
 main{margin-left:0}
 #sidebar{box-shadow:16px 0 40px rgba(0,0,0,.5)}
 body.sidebar-motion-ready #backdrop:not([hidden]),body:not(.sidebar-closed) #backdrop:not([hidden]){display:block;position:fixed;inset:0;z-index:25;background:rgba(0,0,0,.55);border:0}
 main>header{padding:0 8px}
 #pageTitle .crumb-muted,#pageTitle .crumb-sep{display:none}
 body:not(.home-screen) #headerBrand{display:none}
 #conversation{padding:12px 16px 28px}
 .chat-message{font-size:15px}
 #messageList>.chat-message.user{max-width:88%}
 .composer-wrap{padding:6px 10px max(10px,env(safe-area-inset-bottom))}

 .composer{padding:16px 10px 10px;border-radius:var(--r-2xl)}
 .composer-bottom{gap:8px}
 .attachment-trigger{width:36px;padding:0}
 .attachment-trigger>span{display:none}
 .composer textarea{font-size:16px}
 .home-intro{margin-bottom:20px}
 .home-intro p{font-size:13.5px}
 .suggestions{padding:0 12px}
 .content-page{padding:20px 16px 48px}
 .page-heading{flex-direction:column;align-items:flex-start}
 .stats{grid-template-columns:1fr}
 .row-actions{opacity:1;transform:none}
 .row-actions .ghost{display:none}
 #documentPanel{width:100%;z-index:35}
 .subscription-grid{grid-template-columns:1fr}
 dialog.subscription-dialog{width:calc(100vw - 16px)}
 .setting-row{flex-direction:column;align-items:flex-start;gap:10px}
 .setting-row input:not([type=checkbox]){width:100%}
 .upgrade-button span{display:none}
 .upgrade-button{padding:0 9px}
 .composer-note{display:none}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
body[data-motion=off] *,body[data-motion=off] *::before,body[data-motion=off] *::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}

/* Paper tutor inherits the interface faces and palette. */
.paper-tutor-dialog,.paper-tutor-workspace{font-family:var(--font-sans)}
.paper-tutor-dialog{background:var(--overlay)}
.tutor-launch-head h1{font-family:var(--font-serif);font-weight:400;font-size:38px;letter-spacing:-.005em}

/* ── Metal upgrade (metal-fx) ───────────────────────────── */
.upgrade-host{display:inline-flex}
.metal-upgrade{display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 14px 0 11px;border-radius:999px;font-size:13px;font-weight:600;color:var(--text);letter-spacing:-.005em}
.metal-upgrade svg{width:15px;height:15px;transition:transform var(--slow) var(--spring)}
.metal-upgrade:hover svg{transform:rotate(-14deg) scale(1.15)}
.upgrade-host .metal-fx-fallback .metal-upgrade{background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line-2)}

/* ── Agent bots (bot-avatars) ───────────────────────────── */
.home-bot{display:flex;justify-content:center;height:64px;margin:0 auto 18px;cursor:pointer;animation:greet-in .7s var(--ease-out) both}
body.learn-mode .mode-trigger::before{display:none}
.mode-agent{display:grid;place-items:center;width:32px;height:32px;flex-shrink:0}
.mode-agent-icon{border-radius:10px;background:var(--surface-3);box-shadow:inset 0 0 0 1px var(--line-2);color:var(--text-2)}
.mode-agent-icon svg{width:17px;height:17px}
.mode-menu>button>span:nth-child(2){flex:1}
.mode-menu .mode-check{opacity:0;transform:scale(.6)}
.mode-menu [aria-checked=true] .mode-check{opacity:1;transform:none;color:var(--text)}
.mode-menu .mode-go{opacity:0;transform:translateX(-4px);transition:opacity var(--fast),transform var(--med) var(--ease-out)}
.mode-menu #tutorMode:hover .mode-go,.mode-menu #tutorMode:focus-visible .mode-go{opacity:1;transform:none}
.agent-host{display:grid;place-items:center;width:28px;height:28px;flex-shrink:0}

/* ── Tutor: voice glow + living glass orb ───────────────── */
.tutor-composer{position:relative}
.tutor-composer>.voice-host{position:absolute;inset:0;z-index:0;border-radius:inherit;pointer-events:none}
.tutor-composer>*:not(.voice-host){position:relative;z-index:5}
.tutor-orb[data-orb=cosmic]{position:relative;isolation:isolate;overflow:visible!important;background:none!important;box-shadow:none!important}
.tutor-orb[data-orb=cosmic] .orb-stage{position:absolute;inset:0;display:block;transform-origin:50% 50%;will-change:transform}
.paper-tutor-workspace .tutor-orb,.tutor-orb[data-orb=cosmic]{width:220px;height:220px}
.tutor-orb[data-orb=cosmic] .orb-clip{clip-path:none;-webkit-clip-path:none;mask-image:none;-webkit-mask-image:none;border-radius:50%;overflow:hidden;transform:translateZ(0)}
.tutor-orb[data-orb=cosmic] .orb-canvas{clip-path:none;-webkit-clip-path:none}
@media(max-width:700px){.paper-tutor-workspace .tutor-orb,.tutor-orb[data-orb=cosmic]{width:160px;height:160px}}
.tutor-orb[data-orb=cosmic] .orb-canvas{transform-origin:50% 50%;will-change:transform}
.tutor-orb[data-orb=cosmic] .orb-motion,.tutor-orb[data-orb=cosmic] .orb-motion[data-state=speaking]{animation:none!important}
.orb-halo{position:absolute;inset:-18%;z-index:-1;border-radius:50%;pointer-events:none;opacity:.2;background:radial-gradient(circle,rgba(150,230,235,.38) 0%,rgba(130,150,255,.16) 38%,transparent 68%);will-change:transform,opacity}
.orb-sheen{position:absolute;inset:0;z-index:2;border-radius:50%;pointer-events:none;opacity:.22;mix-blend-mode:screen;background:conic-gradient(from 0deg,transparent 0 35deg,rgba(255,255,255,.42) 58deg,transparent 92deg,transparent 190deg,rgba(170,225,255,.3) 222deg,transparent 256deg);-webkit-mask-image:radial-gradient(circle,transparent 46%,#000 78%);mask-image:radial-gradient(circle,transparent 46%,#000 78%)}

/* ── Activity chart (dot matrix) ────────────────────────── */
.chart-card{border-radius:var(--r-xl);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);overflow:hidden;transition:opacity var(--med)}
.chart-card.is-loading{opacity:.6}
.chart-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px 6px}
.chart-title{display:flex;align-items:baseline;gap:10px}
.chart-title h2{margin:0;font-size:14.5px;font-weight:600;letter-spacing:-.01em}
.chart-streak{font-size:12px;color:var(--text-3)}
.chart-streak:not(:empty)::before{content:'';display:inline-block;width:6px;height:6px;margin-right:6px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px var(--success-soft);vertical-align:1px}
.chart-range button{min-width:44px}
.chart-body{display:grid;grid-template-columns:30px minmax(0,1fr);gap:8px;padding:10px 18px 0}
.chart-y{display:flex;flex-direction:column;justify-content:space-between;height:200px;padding:0 0 1px;font-family:var(--font-mono);font-size:10.5px;color:var(--text-4);text-align:right}
.chart-plot{position:relative;height:200px;cursor:crosshair}
.chart-grid{display:grid;grid-template-columns:repeat(var(--cols,30),minmax(0,1fr));gap:3px;height:100%}
.chart-col{display:flex;flex-direction:column-reverse;gap:3px;border-radius:3px}
.chart-col i{flex:1;border-radius:2.5px;background:var(--surface-3);transition:background-color .38s var(--ease-out),opacity .38s,transform .38s var(--spring)}
.chart-col i.on{background:var(--text-2)}
.chart-col i.peak{background:var(--text)}
.chart-plot.is-hovering .chart-col:not(.is-hot) i.on{opacity:.45}
.chart-col.is-hot i.on{background:var(--text)}
.chart-col.is-hot i:not(.on){background:var(--surface-4)}
.chart-cross{position:absolute;top:-6px;bottom:-6px;width:0;border-left:1px dashed var(--line-3);transform:translateX(-.5px);opacity:0;pointer-events:none;transition:opacity var(--fast)}
.chart-tip{position:absolute;top:-4px;z-index:3;display:grid;gap:1px;padding:7px 10px;border-radius:var(--r-md);background:var(--overlay);box-shadow:var(--shadow-pop);white-space:nowrap;transform:translate(-50%,-100%);opacity:0;pointer-events:none;transition:opacity var(--fast)}
.chart-tip span{font-size:11.5px;color:var(--text-3)}
.chart-tip strong{font-family:var(--font-mono);font-size:13px;font-weight:550}
.chart-pill{position:absolute;bottom:-26px;z-index:3;padding:2px 7px;border-radius:99px;font-size:11px;font-weight:600;color:#141413;background:var(--text);transform:translateX(-50%);opacity:0;pointer-events:none;white-space:nowrap;transition:opacity var(--fast)}
.chart-plot.is-hovering .chart-cross,.chart-plot.is-hovering .chart-tip,.chart-plot.is-hovering .chart-pill{opacity:1}
.chart-x{position:relative;height:34px;margin:0 18px 0 56px;font-size:11px;color:var(--text-4)}
.chart-x span{position:absolute;top:10px;transform:translateX(-50%);white-space:nowrap}
.chart-plot.is-hovering~.chart-x,.chart-card:has(.chart-plot.is-hovering) .chart-x{opacity:.35}
.metric-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line)}
.metric-tab{position:relative;display:grid;gap:6px;padding:14px 16px 16px;text-align:left;border-right:1px solid var(--line);transition:background var(--fast)}
.metric-tab:last-child{border-right:0}
.metric-tab::before{content:'';position:absolute;left:0;right:0;top:-1px;height:2px;background:var(--text);transform:scaleX(0);transform-origin:left;transition:transform var(--slow) var(--ease-out)}
.metric-tab:hover{background:var(--surface-2)}
.metric-tab[aria-selected=true]::before{transform:none}
.metric-label{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-3)}
.metric-tab[aria-selected=true] .metric-label{color:var(--text-2)}
.metric-value{font-family:var(--font-mono);font-size:24px;font-weight:500;letter-spacing:-.02em;line-height:1.1}
.metric-change{font-size:11.5px;color:var(--text-4)}
.metric-change[data-dir=up]{color:var(--success)}
.metric-change[data-dir=down]{color:var(--danger)}
@media(max-width:740px){.metric-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.metric-tab:nth-child(2){border-right:0}.metric-tab:nth-child(-n+2){border-bottom:1px solid var(--line)}.chart-head{flex-direction:column;align-items:flex-start}.chart-grid,.chart-col{gap:2px}}














/* Custom Working brand mark. */
.header-brand,.auth-logo{gap:8px}.brand-mark{display:block;flex-shrink:0;object-fit:contain}.header-brand .brand-mark{width:28px;height:28px}.auth-logo .brand-mark{width:36px;height:36px}
.auth-google{width:100%;margin:18px 0 0;justify-content:center}.auth-google:disabled{opacity:.4;cursor:default}.auth-divider{display:flex;align-items:center;gap:12px;color:var(--text-3);font-size:11px;margin:17px 0}.auth-divider::before,.auth-divider::after{content:'';flex:1;height:1px;background:var(--line-2)}

/* Align the checkpoint's content with the surrounding reading column. */
#messageList .learning-card{margin-inline:-20px;width:calc(100% + 40px);isolation:isolate}
.checkpoint-beam{position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none}
.learning-card.has-checkpoint-beam{box-shadow:inset 0 0 0 1px var(--line-2)}
@media(max-width:740px){#messageList .learning-card{margin-inline:-8px;width:calc(100% + 16px);padding-inline:8px}}

/* GSAP owns the mode-change transition after the first switch. */
body.mode-motion-ready #modeLabel,body.mode-motion-ready .home-intro h1,body.mode-motion-ready .home-intro p,body.mode-motion-ready .home-bot{animation:none}