:root{color-scheme:light;--bg:#eef0f3;--card:#f8f9fb;--ink:#1d2227;--ink2:#444b53;--muted:#58606a;--line:#d3d8de;--line2:#b4bcc6;--side:#e5e8ec;--soft:#e2e6ea;--hover:#d9dee4;--active:#cfd5dc;--btn:#24485c;--btn-h:#365768;--warn:#9f732a;--blue:#246282}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#1e1e1e;--card:#232426;--ink:#d4d4d4;--ink2:#b4b4b4;--muted:#9d9d9d;--line:#333436;--line2:#46494d;--side:#252526;--soft:#2a2b2d;--hover:#2e2f31;--active:#37383b;--btn:#2f6a8e;--btn-h:#3f84ad;--warn:#d9a441;--blue:#5ab0f5}}
:root[data-theme=dark]{color-scheme:dark;--bg:#1e1e1e;--card:#232426;--ink:#d4d4d4;--ink2:#b4b4b4;--muted:#9d9d9d;--line:#333436;--line2:#46494d;--side:#252526;--soft:#2a2b2d;--hover:#2e2f31;--active:#37383b;--btn:#2f6a8e;--btn-h:#3f84ad;--warn:#d9a441;--blue:#5ab0f5}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:15px/1.6 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.45}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #78a8c0;outline-offset:3px}.app-shell{display:flex;height:100dvh;min-height:0}.sidebar{width:250px;flex-shrink:0;background:var(--side);padding:26px 16px 18px;display:flex;flex-direction:column;border-right:1px solid var(--hover)}.brand{font-size:23px;font-weight:800;color:var(--ink);text-decoration:none;letter-spacing:.4px;padding:0 10px}.brand span{font-size:10px;letter-spacing:2.5px;margin-left:7px;font-weight:500;color:var(--muted)}.new-chat{background:var(--bg);border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;gap:10px;margin:30px 0 24px;padding:10px 12px;text-align:left;font-size:13px}.new-chat>span:first-child{font-size:20px;line-height:1}.sidebar-label{padding:0 11px;font-size:10px;letter-spacing:1.3px;color:var(--muted);margin:0 0 9px}#chat-list{overflow:auto;flex:1;min-height:60px}.chat-item{display:block;width:100%;text-align:left;padding:11px 12px;border:0;background:transparent;border-radius:7px;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink2)}.chat-item.active{background:var(--active);color:var(--ink)}.chat-item:hover{background:var(--hover)}.dataset{display:flex;gap:11px;padding:18px 10px 0;border-top:1px solid var(--line);margin-top:20px}.dataset-icon{font-size:23px;color:var(--muted)}.dataset strong{font-size:11px;font-weight:600}.dataset p{font-size:12px;color:var(--muted);margin:3px 0}.dataset small{font-size:10px;color:var(--muted)}.fictional{font-size:10px;line-height:1.6;color:var(--muted);padding:0 10px;margin:12px 0 20px}.sidebar-footer{font-size:10px;letter-spacing:1.3px;padding:0 10px;color:var(--muted)}.chat-main{flex:1;min-width:0;display:flex;flex-direction:column;height:100dvh}.chat-header{height:72px;padding:0 30px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between}.header-left,.header-actions{display:flex;align-items:center;gap:16px}.header-title{font-size:17px;font-weight:600;color:var(--ink2)}.header-chevron{color:var(--muted);font-size:17px;margin-left:7px}.text-button,.icon-button{border:0;background:transparent;color:var(--muted);padding:8px;border-radius:7px;font-size:12px}.text-button:hover,.icon-button:hover{background:var(--soft)}header select{border:0;background:transparent;color:var(--muted);font-size:12px;padding:8px}.chat-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth}.welcome{max-width:790px;margin:clamp(40px,11vh,135px) auto 40px;text-align:center;padding:0 32px}.welcome-mark{width:44px;height:44px;margin:0 auto 22px;background:var(--soft);color:var(--ink);border-radius:13px;display:flex;align-items:center;justify-content:center;position:relative;font-size:23px;font-weight:750}.welcome-mark span{font-size:11px;margin-left:2px}h1{font-size:30px;font-weight:600;line-height:1.35;letter-spacing:-.8px;white-space:pre-line;margin:0 0 15px}.welcome>p{font-size:13px;color:var(--muted);max-width:480px;margin:0 auto}.prompt-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;text-align:left;margin:36px auto 0;max-width:670px}.prompt-card{border:1px solid var(--line);background:var(--bg);border-radius:11px;padding:16px 18px;color:var(--ink2);line-height:1.6;font-size:12px;display:flex;text-align:left;gap:12px;min-height:81px;align-items:center}.prompt-card:hover{background:var(--soft);border-color:var(--line2)}.prompt-icon{color:var(--muted);font-size:17px}.messages{max-width:840px;padding:24px 38px 32px;margin:0 auto}.messages:empty{display:none}.message{margin:0 0 30px}.message.user{display:flex;justify-content:flex-end;margin:12px 0 34px}.user-bubble{background:var(--soft);border-radius:20px 20px 4px 20px;padding:12px 18px;max-width:85%;font-size:15px;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}.message.assistant{display:flex;gap:15px;align-items:flex-start}.assistant-avatar{background:var(--btn);color:white;border-radius:9px;width:29px;height:29px;flex:0 0 29px;display:grid;place-items:center;font-size:13px;font-weight:650;margin-top:2px}.assistant-content{min-width:0;flex:1;padding-top:1px}.answer-text{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.9;margin:0 0 12px}.message-footer{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:10px;color:var(--muted);margin-top:13px}.retry-button{border:1px solid var(--line);background:var(--bg);border-radius:7px;color:var(--muted);font-size:11px;padding:5px 11px}.status-note{color:var(--warn);font-size:10px;margin-bottom:8px}.thinking{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:8px;min-height:30px}.thinking:before{content:"";width:7px;height:7px;background:var(--muted);border-radius:50%;animation:pulse 1s ease-in-out infinite}.candidates{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}.candidate{border:1px solid var(--line);background:var(--soft);border-radius:8px;color:var(--ink2);padding:7px 10px;font-size:11px;text-align:left}.evidence{border-top:1px solid var(--line);margin-top:15px;padding-top:11px}.evidence summary,.records summary{font-size:11px;color:var(--muted);cursor:pointer;user-select:none}.evidence-summary{font-size:11px;line-height:1.8;color:var(--muted);padding:11px 0}.evidence pre{background:var(--soft);padding:13px;border-radius:7px;font-size:10px;white-space:pre-wrap;overflow-wrap:anywhere;max-height:300px;overflow:auto}.records{margin:13px 0}.table-wrap{max-height:350px;overflow:auto;margin:10px 0}table{border-collapse:collapse;font-size:11px;width:100%}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap;max-width:300px;overflow:hidden;text-overflow:ellipsis}th{background:var(--soft);font-weight:500;position:sticky;top:0}td details{white-space:normal;max-width:280px}td pre{font-size:10px;white-space:pre-wrap}.composer-area{width:100%;max-width:840px;align-self:center;padding:10px 30px 12px;flex-shrink:0;background:var(--bg)}.composer{border:1px solid var(--line);border-radius:22px;padding:14px 16px 12px;box-shadow:0 3px 18px #142c4010;background:var(--bg)}.composer:focus-within{border-color:var(--line2);box-shadow:0 3px 18px #142c4015}textarea{width:100%;display:block;border:0;background:transparent;color:var(--ink);font-size:15px;line-height:1.6;resize:none;padding:0 3px;min-height:30px;max-height:180px;overflow-y:hidden}textarea:focus-visible{outline:none}textarea::placeholder{color:var(--muted)}.composer-toolbar{display:flex;justify-content:space-between;align-items:center;margin-top:10px}.composer-hint{font-size:10px;color:var(--muted);padding-left:4px}.send-button{border:0;background:var(--btn);color:white;border-radius:50%;width:33px;height:33px;display:grid;place-items:center;transition:background .15s}.send-button:hover{background:var(--btn-h)}.composer-footnote{text-align:center;color:var(--muted);font-size:10px;margin:10px 0 0;line-height:1.6}.filter-dialog{width:min(600px,calc(100% - 30px));max-height:90dvh;overflow:auto;border:1px solid var(--line);border-radius:16px;padding:27px;color:var(--ink);box-shadow:0 20px 100px #15304430}.filter-dialog::backdrop{background:#172a3d38;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px}.dialog-heading h2{font-size:19px;margin:0}.dialog-heading p{font-size:12px;color:var(--muted);margin:6px 0 0}.filter-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.filter-grid label{display:grid;gap:7px;font-size:11px;color:var(--muted)}.filter-grid input,.filter-grid select{border:1px solid var(--line);background:var(--bg);border-radius:7px;padding:10px;font-size:12px;min-width:0;width:100%;color:var(--ink2)}.filter-note{font-size:11px;color:var(--muted);margin:22px 0}.calculate-button{display:block;margin-left:auto;background:var(--btn);color:white;border:0;padding:10px 20px;border-radius:8px;font-size:12px}.mobile-only{display:none}.sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}@keyframes pulse{50%{opacity:.3}}@media(prefers-reduced-motion:reduce){.thinking:before{animation:none}.chat-scroll{scroll-behavior:auto}}@media(max-width:1100px){.sidebar{width:220px}.welcome{margin-top:9vh}h1{font-size:27px}.messages{padding:20px 30px}.chat-header{padding:0 24px}}@media(max-width:760px){.sidebar{position:fixed;z-index:10;left:0;top:0;bottom:0;width:250px;transform:translateX(-100%);transition:transform .2s;box-shadow:none}.sidebar.open{transform:translateX(0);box-shadow:20px 0 60px #172a3d20}.mobile-only{display:block}.chat-header{height:61px;padding:0 14px}.header-left,.header-actions{gap:7px}.header-title{font-size:15px}.header-actions select{font-size:11px;max-width:100px}.welcome{margin-top:7vh;padding:0 23px}h1{font-size:26px}.welcome>p{font-size:12px}.prompt-grid{gap:8px;margin-top:25px}.prompt-card{font-size:11px;padding:13px 11px;min-height:88px;gap:8px}.prompt-icon{font-size:14px}.messages{padding:18px 16px 20px}.message.assistant{gap:10px}.assistant-avatar{width:25px;height:25px;flex-basis:25px;font-size:11px}.answer-text,.user-bubble{font-size:14px}.user-bubble{max-width:91%;padding:11px 15px}.composer-area{padding:8px 12px max(8px,env(safe-area-inset-bottom))}.composer{border-radius:19px;padding:12px 13px 10px}.composer-footnote{font-size:10px;max-width:340px;margin:8px auto 0}.composer-hint{font-size:10px}.filter-grid{grid-template-columns:1fr}.filter-dialog{padding:23px}.message{margin-bottom:25px}}
.send-button.stop svg{display:none}.send-button.stop:before{content:"";display:block;width:11px;height:11px;background:currentColor;border-radius:2px}

.sidebar{border-right-color:var(--line)}.dataset{border-top-color:var(--line)}.evidence{border-top-color:var(--line)}.composer{box-shadow:0 3px 18px #00000014}@media(prefers-color-scheme:dark){.composer,.filter-dialog{box-shadow:none}.filter-dialog{background:var(--bg)}.filter-dialog::backdrop{background:#000a}}
.filter-dialog{background:var(--bg)}.brand,.assistant-avatar{color:var(--ink)}.assistant-avatar{color:#fff}.welcome-mark{color:var(--ink)}.candidate{color:var(--ink2)}

.app-shell.collapsed .sidebar{display:none}.icon-button{min-width:36px;min-height:36px}
.sources,.suggestions{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:12px 0 4px}.sources-label{font-size:10px;letter-spacing:.8px;text-transform:uppercase;color:var(--muted);margin-right:3px}
.source-chip,.suggestion{border:1px solid var(--line);background:var(--soft);color:var(--ink2);border-radius:999px;padding:4px 11px;font-size:11px;line-height:1.5;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.source-chip:hover,.source-chip:focus-visible,.suggestion:hover{border-color:var(--line2);background:var(--hover);color:var(--ink)}.suggestion{border-radius:10px;white-space:normal;text-align:left;padding:7px 12px;font-size:12px}
mark.hl{background:#f5c34238;color:inherit;border-radius:3px;padding:0 2px;box-shadow:0 0 0 1px #f5c34266}
.fb-bar{display:inline-flex;gap:2px;margin-right:4px}.fb-btn{border:0;background:transparent;color:var(--muted);border-radius:6px;width:28px;height:28px;display:grid;place-items:center}.fb-btn:hover{background:var(--soft);color:var(--ink)}.fb-btn[aria-pressed=true]{color:var(--blue);background:var(--soft)}.fb-btn.down svg{transform:rotate(180deg)}
.answer-text.typing::after{content:"\25CD";margin-left:1px;color:var(--muted);animation:blink 1s steps(2) infinite}.reveal{animation:reveal .35s ease both}@keyframes blink{50%{opacity:0}}@keyframes reveal{from{opacity:0;transform:translateY(4px)}}
.evidence-notes{margin-top:8px;white-space:pre-wrap}.composer-hint:empty{display:none}.composer-toolbar{justify-content:flex-end}
@media(prefers-reduced-motion:reduce){.answer-text.typing::after,.reveal{animation:none}}
@media(max-width:760px){.app-shell.collapsed .sidebar{display:flex}}

.sidebar-close{display:none;position:absolute;top:14px;right:10px;font-size:15px}
.evidence-summary{white-space:pre-line}
body.busy .suggestion,body.busy .source-chip{pointer-events:none;opacity:.5}
.message.assistant:not(:last-child) .suggestions{display:none}
@media(max-width:900px){.sidebar{position:fixed;z-index:10;left:0;top:0;bottom:0;width:250px;transform:translateX(-100%);visibility:hidden;transition:transform .2s,visibility .2s}.sidebar.open{transform:translateX(0);visibility:visible;box-shadow:20px 0 60px #172a3d30}.app-shell.collapsed .sidebar{display:flex}.sidebar-close{display:grid}.sidebar{padding-top:26px}.brand{padding-right:40px}}
@media(max-width:900px){.sidebar.open~.chat-main::before{content:"";position:fixed;inset:0;background:#0000006b;z-index:9}}

/* ---- smoothness ---- */
:root{--ease:cubic-bezier(.22,.61,.36,1)}
body,.sidebar,.chat-header,.composer,.composer-area,.prompt-card,.user-bubble,.source-chip,.suggestion,.chat-item,.new-chat,.evidence pre,th,.filter-dialog,.icon-button,.fb-btn,.send-button,.retry-button,.candidate,select{transition:background-color .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease),opacity .2s var(--ease),transform .2s var(--ease)}
.message.enter{animation:msgIn .42s var(--ease) both}.message.user.enter .user-bubble{animation:bubbleIn .42s var(--ease) both;transform-origin:100% 100%}
@keyframes msgIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes bubbleIn{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}
.thinking{animation:fadeIn .3s var(--ease) both}@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.welcome{animation:fadeIn .4s var(--ease) both}
.prompt-card:hover,.suggestion:hover{transform:translateY(-1px)}.send-button:active,.prompt-card:active,.suggestion:active{transform:scale(.97)}
details.evidence[open]>*:not(summary),details.records[open]>*:not(summary){animation:reveal .28s var(--ease) both}
.sidebar{transition:width .28s var(--ease),padding .28s var(--ease),opacity .2s var(--ease),border-color .25s,background-color .25s,transform .25s var(--ease),visibility .25s}
@media(min-width:901px){.app-shell .sidebar{overflow:hidden;white-space:normal}.app-shell.collapsed .sidebar{display:flex;width:0;padding-left:0;padding-right:0;opacity:0;border-right-width:0;visibility:hidden;pointer-events:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
/* ---- header controls ---- */
.header-actions{gap:8px}.header-actions .icon-button,.header-actions select{height:36px}
.header-actions .icon-button{width:36px;padding:0;display:grid;place-items:center;font-size:15px;border:1px solid var(--line);color:var(--ink2)}
.header-actions .icon-button:hover{border-color:var(--line2);background:var(--soft)}
header select{appearance:none;-webkit-appearance:none;border:1px solid var(--line);background-color:transparent;color:var(--ink2);font-size:13px;padding:0 30px 0 12px;border-radius:8px;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 17px) 50%,calc(100% - 12px) 50%;background-size:5px 5px;background-repeat:no-repeat}
header select:hover{border-color:var(--line2);background-color:var(--soft)}
select option{background:var(--bg);color:var(--ink)}
/* ---- sidebar dataset block ---- */
.dataset{align-items:flex-start;gap:12px;padding:16px 10px 0}.dataset-icon{font-size:20px;line-height:1;margin-top:1px}.dataset strong{font-size:13px;color:var(--ink)}.dataset p{font-size:13px;color:var(--ink2);margin:2px 0 3px}.dataset small{font-size:11px;color:var(--muted);letter-spacing:.2px}
.fictional{font-size:11px;color:var(--muted);line-height:1.55;margin:12px 0 14px}.sidebar-footer{font-size:10px;letter-spacing:1.6px;color:var(--muted);opacity:.85}

.message.user{align-items:center;gap:6px}.user-copy{opacity:0;width:26px;height:26px}.message.user:hover .user-copy,.user-copy:focus-visible{opacity:1}@media(hover:none){.user-copy{opacity:.7}}
.ai-status{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--ink2);padding:0 10px;margin:0 0 12px}.ai-dot{width:7px;height:7px;border-radius:50%;background:#d9a441;flex:none}.ai-status[data-on="1"] .ai-dot{background:#3fb27f}
/* ---- Full HD and wider (>=1600px) ---- */
@media(min-width:1600px){.sidebar{width:290px;padding:30px 20px 22px}.chat-header{height:80px;padding:0 44px}.header-title{font-size:18px}.messages,.composer-area{max-width:1120px}.messages{padding:30px 48px 40px}.composer-area{padding:12px 48px 16px}.welcome{max-width:1000px;margin-top:clamp(60px,14vh,190px)}.prompt-grid{max-width:860px;gap:14px}.prompt-card{font-size:13px;min-height:92px;padding:18px 22px}h1{font-size:34px}.welcome>p{font-size:14px;max-width:560px}.answer-text,.user-bubble,textarea{font-size:16px}.answer-text{line-height:1.85}.user-bubble{max-width:75%}.source-chip,.suggestion{font-size:12px}.message-footer{font-size:11px}.evidence summary,.records summary{font-size:12px}.evidence-summary{font-size:12px}table{font-size:12px}.chat-item{font-size:13px}.dataset strong,.dataset p{font-size:14px}.ai-status{font-size:12px}.composer-footnote{font-size:11px}.assistant-avatar{width:32px;height:32px;flex-basis:32px;font-size:14px}}
/* ===== Typography scale (final, overrides all earlier sizes) =====
   body 16px · UI 14px · captions 12px (rem, so browser font settings and zoom work) */
:root{--fs-body:1rem;--fs-ui:.875rem;--fs-cap:.75rem;--lh-body:1.65}
html{font-size:100%;-webkit-text-size-adjust:100%}
@media(min-width:1600px){html{font-size:106.25%}}
@media(min-width:2200px){html{font-size:118.75%}}
body{font-size:var(--fs-body);line-height:var(--lh-body)}
.answer-text,.user-bubble,textarea,.message.assistant .answer-text{font-size:var(--fs-body);line-height:1.7}
.chat-item,.new-chat,.text-button,.icon-button,header select,.header-actions select,.prompt-card,.source-chip,.suggestion,.candidate,.retry-button,.evidence summary,.records summary,.evidence-summary,table,.dataset p,.dataset strong,.ai-status,.filter-grid label,.filter-grid input,.filter-grid select,.filter-note,.calculate-button,.dialog-heading p,.welcome>p,.composer-hint,.thinking{font-size:var(--fs-ui)}
.message-footer,.sources-label,.sidebar-label,.composer-footnote,.dataset small,.fictional,.sidebar-footer,.status-note,.evidence pre,td pre,.brand span,.welcome-mark span{font-size:var(--fs-cap);line-height:1.5}
.sidebar-label,.sources-label,.sidebar-footer,.brand span{letter-spacing:.06em}
.brand{font-size:1.5rem}.header-title{font-size:1.125rem}.dialog-heading h2{font-size:1.25rem}.dataset strong{font-weight:600}.welcome-mark{font-size:1.4rem}
h1{font-size:clamp(1.75rem,3.2vw,2.125rem);line-height:1.3}
.welcome>p{max-width:34em;line-height:1.6}
.prompt-card{line-height:1.5;min-height:84px}
.source-chip{padding:5px 13px}.suggestion{padding:9px 14px;line-height:1.45}
.evidence-summary{line-height:1.7}
.assistant-avatar{width:32px;height:32px;flex-basis:32px;font-size:.875rem}
.fb-btn{width:32px;height:32px}.fb-btn svg{width:16px;height:16px}
.chat-item{padding:10px 12px}.new-chat{padding:11px 14px}
th,td{padding:10px 14px}
.message-footer{gap:12px}.status-note{margin-bottom:8px}
.composer-footnote{max-width:46em;margin-left:auto;margin-right:auto}
@media(max-width:760px){.answer-text,.user-bubble,textarea{font-size:var(--fs-body)}.prompt-card{font-size:var(--fs-ui);padding:14px 12px}h1{font-size:1.625rem}.composer-footnote{font-size:var(--fs-cap);max-width:none}.header-title{font-size:1rem}}
@media(max-width:760px){.header-actions select{max-width:none;padding:0 28px 0 10px}.header-actions{gap:6px}.chat-header{padding:0 10px}}
@media(min-width:2200px){.messages,.composer-area{max-width:1360px}.sidebar{width:340px}.welcome{max-width:1200px}.prompt-grid{max-width:1000px}}
/* ===== Scrolling: no page scroll, slim themed scrollbars ===== */
html,body{height:100%;overflow:hidden;overscroll-behavior:none}
.app-shell{height:100dvh;overflow:hidden}.chat-main{min-width:0;min-height:0;overflow:hidden}
*{scrollbar-width:thin;scrollbar-color:var(--line2) transparent}
*:hover{scrollbar-color:var(--muted) transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--line2);border-radius:10px;border:3px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:var(--muted);background-clip:content-box;border:3px solid transparent}
::-webkit-scrollbar-button{display:none;width:0;height:0}
::-webkit-scrollbar-corner{background:transparent}
.chat-scroll{scrollbar-gutter:stable;scroll-padding-bottom:24px}
textarea{scrollbar-width:thin;overscroll-behavior:contain}
.table-wrap,.evidence pre,#chat-list{overscroll-behavior:contain}

/* cards/controls sit slightly above the page background in both themes */
.composer,.prompt-card,.retry-button,.new-chat,.filter-grid input,.filter-grid select,.filter-dialog,.composer-area{background:var(--card)}
.composer-area{background:var(--bg)}
.prompt-card:hover{background:var(--soft)}
.user-bubble{background:var(--active)}
:root:not([data-theme=dark]) .composer{box-shadow:0 2px 14px #1d222714}

/* ===== Follow-up suggestions: tidy list ===== */
.suggestions{display:flex;flex-direction:column;align-items:stretch;gap:6px;margin:18px 0 4px;max-width:520px}
.suggestions .sources-label{margin:0 0 2px}
.suggestions .suggestion{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:10px 14px;font-size:var(--fs-ui);line-height:1.4;text-align:left;white-space:normal}
.suggestions .suggestion:hover,.suggestions .suggestion:focus-visible{background:var(--soft);border-color:var(--line2);transform:none}
.sg-arrow{color:var(--muted);flex:none;transition:transform .2s var(--ease),color .2s}.suggestion:hover .sg-arrow,.suggestion:focus-visible .sg-arrow{transform:translateX(3px);color:var(--ink)}

/* ===== Sources + "About this answer" as one tidy card ===== */
.sources{display:flex;flex-wrap:wrap;align-items:center;gap:8px 8px;margin:18px 0 0;padding:12px 14px;max-width:640px;background:var(--card);border:1px solid var(--line);border-radius:10px}
.sources:has(+.evidence){border-radius:10px 10px 0 0;border-bottom-color:transparent}
.sources .sources-label{margin:0 6px 0 0;font-weight:600;color:var(--ink2)}
.source-chip{display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--soft);color:var(--ink2);border-radius:7px;padding:4px 10px;font-size:var(--fs-ui);line-height:1.4}
.source-chip[data-k=result]{color:var(--ink);font-weight:600;background:var(--active);border-color:var(--line2)}
.source-chip[data-k=period],.source-chip[data-k=filter]{font-variant-numeric:tabular-nums}
.source-chip:hover,.source-chip:focus-visible{background:var(--hover);border-color:var(--line2);color:var(--ink)}
.evidence{margin:18px 0 0;padding:0;max-width:640px;border:1px solid var(--line);border-radius:10px;background:var(--card);overflow:hidden}
.sources+.evidence{margin-top:0;border-top:1px solid var(--line);border-radius:0 0 10px 10px}
.evidence>summary{display:flex;align-items:center;gap:10px;padding:11px 14px;cursor:pointer;list-style:none;font-size:var(--fs-ui);color:var(--ink2);font-weight:500}
.evidence>summary::-webkit-details-marker{display:none}
.evidence>summary::before{content:"";width:7px;height:7px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);transition:transform .22s var(--ease);margin:0 4px 0 2px}
.evidence[open]>summary::before{transform:rotate(45deg)}
.evidence>summary:hover{background:var(--soft);color:var(--ink)}
.evidence .evidence-summary{padding:2px 16px 14px 34px;font-size:var(--fs-ui);line-height:1.7;color:var(--ink2);border-top:0}
.evidence details{margin:0 14px 12px 34px}.evidence details>summary{font-size:var(--fs-cap);color:var(--muted)}
.evidence pre{margin:8px 0 0}
.records{max-width:none}

/* ===== v3: inline citation chips, popover, about sheet, icons, tables, welcome ===== */
svg{flex:none}
.cite-target{border-bottom:1.5px dotted var(--muted);transition:background-color .15s,border-color .15s;border-radius:2px}
.cite-target.on{background:#f5c3422e;border-bottom-color:#d9a441}
.cite-chip{display:inline-flex;align-items:center;gap:5px;vertical-align:1px;margin-left:2px;padding:1px 9px 1px 7px;height:22px;border:1px solid var(--line2);background:var(--soft);color:var(--ink2);border-radius:999px;font-size:12px;line-height:1;font-weight:500;white-space:nowrap}
.cite-chip::after{content:attr(data-label);font-variant-numeric:tabular-nums}
.cite-chip:hover,.cite-chip:focus-visible{background:var(--hover);color:var(--ink);border-color:var(--muted)}
.cite-pop{position:fixed;z-index:60;background:var(--card);color:var(--ink);border:1px solid var(--line2);border-radius:12px;box-shadow:0 14px 44px #0000004d;padding:12px 14px;font-size:var(--fs-ui);opacity:0;transform:translateY(4px);transition:opacity .15s var(--ease),transform .15s var(--ease);pointer-events:none}
.cite-pop.show{opacity:1;transform:none;pointer-events:auto}
.cite-pop-head{display:flex;align-items:center;gap:8px;font-weight:600;margin-bottom:8px;color:var(--ink)}.cite-pop-head svg{color:var(--muted)}
.cite-pop-rows{display:grid;grid-template-columns:auto 1fr;gap:5px 12px;font-size:13px;line-height:1.45}.cite-pop-rows .k{color:var(--muted)}.cite-pop-rows .v{color:var(--ink);overflow-wrap:anywhere}
.cite-pop-more{display:flex;align-items:center;gap:6px;margin-top:10px;padding:6px 0 0;border:0;border-top:1px solid var(--line);background:transparent;color:var(--ink2);font-size:13px;width:100%}.cite-pop-more:hover{color:var(--ink)}.cite-pop-more svg{margin-left:auto}
.about-sheet{margin:0 0 0 auto;height:100dvh;max-height:100dvh;width:min(460px,100vw);border:0;border-left:1px solid var(--line2);background:var(--bg);color:var(--ink);padding:22px 24px;overflow:auto;box-shadow:-20px 0 60px #0000003d}
.about-sheet::backdrop{background:#0000005a;backdrop-filter:blur(2px)}
.about-sheet[open]{animation:sheetIn .28s var(--ease) both}@keyframes sheetIn{from{transform:translateX(24px);opacity:0}}
.about-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.about-head h2{font-size:1.125rem;margin:0}
.about-grid{display:grid;grid-template-columns:minmax(96px,auto) 1fr;gap:12px 18px;font-size:var(--fs-ui);line-height:1.55}.about-grid .k{color:var(--muted)}.about-grid .v{color:var(--ink);overflow-wrap:anywhere}
.about-tech{margin-top:24px;border-top:1px solid var(--line);padding-top:14px}.about-tech>summary{cursor:pointer;color:var(--ink2);font-size:var(--fs-ui);list-style:none;display:flex;align-items:center;gap:8px}.about-tech>summary::-webkit-details-marker{display:none}
.about-tech>summary::before{content:"";width:7px;height:7px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);transition:transform .2s var(--ease)}.about-tech[open]>summary::before{transform:rotate(45deg)}
.about-tech pre{margin:12px 0 0;padding:12px;border-radius:8px;background:var(--soft);font:12px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;max-height:50dvh;overflow:auto;color:var(--ink2)}
/* records disclosure + table */
.records{margin:16px 0 4px;max-width:none}.records>summary{display:inline-flex;align-items:center;gap:8px;padding:6px 12px 6px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink2);font-size:var(--fs-ui);cursor:pointer;list-style:none}
.records>summary::-webkit-details-marker{display:none}.records>summary::before{content:"";width:7px;height:7px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);transition:transform .2s var(--ease)}.records[open]>summary::before{transform:rotate(45deg)}.records>summary:hover{background:var(--soft);color:var(--ink)}
.table-wrap{margin-top:12px;border:1px solid var(--line);border-radius:10px;background:var(--card);max-height:380px}
table{font-size:var(--fs-ui)}th{background:var(--soft);color:var(--ink2);font-weight:600;font-size:var(--fs-cap);text-transform:none;letter-spacing:.02em;border-bottom:1px solid var(--line)}
td,th{padding:10px 16px}td{border-bottom:1px solid var(--line);color:var(--ink)}tbody tr:last-child td{border-bottom:0}tbody tr:hover td{background:var(--soft)}
th.num,td.num{text-align:right;font-variant-numeric:tabular-nums}td.rank{color:var(--muted);width:1%}
/* footer icons, error state, retry */
.fb-btn svg{width:16px;height:16px}.retry-icon{margin-right:2px}
.status-note{display:inline-flex;align-items:center;gap:8px;padding:5px 12px 5px 10px;border:1px solid color-mix(in srgb,var(--warn) 40%,transparent);background:color-mix(in srgb,var(--warn) 12%,transparent);color:var(--warn);border-radius:8px;font-size:var(--fs-ui);margin-bottom:10px}
.status-note::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--warn)}
.message-footer{margin-top:10px}
/* welcome: card grid */
.welcome{padding:0 clamp(16px,4vw,32px)}
.welcome-mark{width:52px;height:52px;border-radius:15px;background:var(--btn);color:#fff;box-shadow:0 8px 24px #0000002e}
.prompt-grid{width:100%;max-width:760px;margin:34px auto 0;gap:12px}
.prompt-card{display:flex;align-items:center;gap:14px;padding:16px 18px;min-height:82px;border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);text-align:left;font-size:var(--fs-ui);line-height:1.5;transition:transform .2s var(--ease),border-color .2s,background-color .2s,box-shadow .2s}
.prompt-card:hover{transform:translateY(-2px);border-color:var(--line2);background:var(--card);box-shadow:0 8px 24px #0000001f}
.prompt-icon{display:grid;place-items:center;width:38px;height:38px;flex:none;border-radius:10px;background:var(--soft);color:var(--ink2)}.prompt-card:hover .prompt-icon{background:var(--btn);color:#fff}
@media(max-width:560px){.prompt-grid{grid-template-columns:1fr}}
/* header/side icon buttons */
.icon-button svg{display:block}.sidebar-close{display:none}
@media(max-width:900px){.sidebar-close{display:grid;place-items:center}}
.dataset-icon{display:grid;place-items:center;color:var(--muted)}

/* ===== v3.1: data card, record card, about-sheet tabs, code blocks ===== */
.data-card{margin:16px 0 4px;border:1px solid var(--line);border-radius:12px;background:var(--card);overflow:hidden;max-width:100%}
.data-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line)}
.data-title{font-weight:600;font-size:var(--fs-ui);color:var(--ink)}
.data-card .table-wrap{margin:0;border:0;border-radius:0;background:transparent;max-height:420px}
.chip-btn{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--ink2);font-size:var(--fs-cap)}.chip-btn:hover{background:var(--soft);color:var(--ink)}
.record-card{padding:6px 16px 12px}.kv-grid{display:grid;grid-template-columns:minmax(120px,max-content) 1fr;gap:0 22px;font-size:var(--fs-ui)}
.kv-grid>span{padding:9px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.kv-grid .k{color:var(--muted)}.kv-grid .v{color:var(--ink);font-variant-numeric:tabular-nums}
.kv-grid>span:nth-last-child(-n+2){border-bottom:0}.kv-grid.small{font-size:var(--fs-cap);margin-top:6px}
.kv-more{margin-top:8px;border-top:1px solid var(--line);padding-top:8px}.kv-more>summary{cursor:pointer;color:var(--ink2);font-size:var(--fs-ui);padding:4px 0}
@media(max-width:560px){.kv-grid{grid-template-columns:1fr;gap:0}.kv-grid .k{padding-bottom:0;border-bottom:0;font-size:var(--fs-cap)}}
.about-tabs{display:flex;gap:4px;padding:4px;background:var(--soft);border-radius:10px;margin-bottom:18px}
.about-tab{flex:1;padding:7px 10px;border:0;border-radius:7px;background:transparent;color:var(--ink2);font-size:var(--fs-ui);font-weight:500}
.about-tab[aria-selected=true]{background:var(--card);color:var(--ink);box-shadow:0 1px 3px #0000002e}
.about-pane[hidden]{display:none}
.code-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px;color:var(--muted);font-size:var(--fs-cap)}
pre.code{margin:0;padding:14px;border-radius:10px;background:var(--soft);border:1px solid var(--line);font:12.5px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;color:var(--ink);max-height:62dvh;overflow:auto}
.code-note{margin-top:10px;color:var(--muted);font-size:var(--fs-cap);overflow-wrap:anywhere}
.about-sheet{width:min(560px,100vw)}

/* ===== reply to selection ===== */
.reply-pop{position:fixed;z-index:70;display:inline-flex;align-items:center;gap:7px;padding:7px 13px 7px 11px;border:1px solid var(--line2);border-radius:999px;background:var(--card);color:var(--ink);font-size:var(--fs-ui);font-weight:500;box-shadow:0 8px 28px #00000040;animation:popIn .15s var(--ease) both}
.reply-pop:hover{background:var(--soft)}@keyframes popIn{from{opacity:0;transform:translateY(4px) scale(.97)}}
.quote-bar{display:flex;align-items:flex-start;gap:10px;margin:-2px 0 10px;padding:9px 8px 9px 12px;border-left:3px solid var(--blue);background:var(--soft);border-radius:8px}
.quote-icon{color:var(--muted);margin-top:2px}.quote-body{min-width:0;flex:1}.quote-label{font-size:var(--fs-cap);color:var(--muted);margin-bottom:2px}
.quote-text{font-size:var(--fs-ui);color:var(--ink2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.quote-block{display:flex;gap:8px;align-items:flex-start;margin:0 0 8px;padding:7px 10px;border-left:3px solid var(--line2);background:#00000018;border-radius:6px;color:var(--ink2);font-size:var(--fs-ui)}
.quote-block span{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.quote-block svg{margin-top:3px;flex:none}
::selection{background:#5ab0f544}
.cite-target{border-bottom:0;text-decoration:none}.cite-target.on{border-bottom:0;box-shadow:0 0 0 2px #f5c3422e}

.cite-target{white-space:nowrap}.cite-chip{white-space:nowrap}
.sg-arrow{display:inline-flex}

/* ===== compact data card / table ===== */
.data-card{margin:12px 0 2px;border-radius:10px}
.data-head{padding:6px 10px 6px 12px}
.data-title{font-size:13px}
.data-head .chip-btn{padding:3px 8px;font-size:12px}
.data-card .table-wrap{max-height:none;overflow-x:auto;overflow-y:visible}
.data-card table{font-size:13px}
.data-card th,.data-card td{padding:5px 12px;line-height:1.35}
.data-card th{font-size:12px;font-weight:600;padding-top:6px;padding-bottom:6px}
.data-card td.rank,.data-card th.num:first-child{padding-left:12px;padding-right:6px}
.data-card tbody tr:hover td{background:var(--soft)}
.record-card{padding:2px 12px 6px}.kv-grid{font-size:13px}.kv-grid>span{padding:6px 0}.kv-more>summary{font-size:13px;padding:2px 0}
@media(min-width:1600px){.data-card table{font-size:14px}.data-card th,.data-card td{padding:6px 14px}}

/* ===== icons: Lucide set, consistent sizing ===== */
.fb-btn.down svg{transform:none}
.suggestions .suggestion{justify-content:flex-start;gap:12px}.sg-icon{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--soft);color:var(--ink2);flex:none}
.suggestion:hover .sg-icon{background:var(--active);color:var(--ink)}.sg-text{flex:1}.sg-arrow{margin-left:auto}
.icon-button svg,.fb-btn svg,.chip-btn svg{stroke-width:1.75}

/* ===== sidebar footer: clean info block ===== */
.dataset{display:flex;align-items:flex-start;gap:12px;margin:18px 0 0;padding:16px 4px 0}
.dataset>div strong{display:block;font-size:14px;line-height:1.3;color:var(--ink)}
.dataset p{margin:2px 0 0;font-size:13px;color:var(--ink2);white-space:nowrap}
.dataset small{display:block;margin-top:2px;font-size:12px;color:var(--muted);white-space:nowrap;letter-spacing:0}
.fictional{margin:10px 4px 12px;padding:0;font-size:12px;line-height:1.5;color:var(--muted)}
.ai-status{margin:0 0 14px;padding:9px 12px;gap:10px;align-items:center;background:var(--soft);border:1px solid var(--line);border-radius:10px;min-width:0}
.ai-text{display:flex;flex-direction:column;min-width:0;line-height:1.25}
.ai-name{font-size:13px;font-weight:600;color:var(--ink)}
.ai-sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-footer{margin:0 4px;font-size:11px;letter-spacing:.08em;color:var(--muted);opacity:.8}
/* invisible bridges so the cursor can travel from chip to card without the card closing */
.cite-pop::before,.cite-pop::after{content:"";position:absolute;left:-12px;right:-12px;height:22px}
.cite-pop::before{bottom:-22px}.cite-pop::after{top:-22px}

.fb-bar{align-items:center;gap:4px}
.about-btn{display:inline-flex;align-items:center;gap:7px;height:30px;margin-left:6px;padding:0 12px 0 10px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--ink2);font-size:var(--fs-cap);font-weight:500}
.about-btn:hover{background:var(--soft);color:var(--ink);border-color:var(--line2)}
.about-btn svg{color:var(--muted)}.about-btn:hover svg{color:var(--ink)}

/* ===== follow-ups: compact Gemini-style tray ===== */
.suggestions{display:flex;flex-direction:row;flex-wrap:wrap;align-items:center;gap:4px 6px;width:fit-content;max-width:100%;margin:16px 0 4px;padding:6px 8px;background:var(--soft);border-radius:14px}
.suggestions .suggestion{display:inline-flex;align-items:center;gap:7px;width:auto;padding:6px 10px;border:0;border-radius:9px;background:transparent;color:var(--ink);font-size:var(--fs-ui);line-height:1.35;text-align:left;font-weight:450}
.suggestions .suggestion svg{color:var(--muted);flex:none}
.suggestions .suggestion:hover,.suggestions .suggestion:focus-visible{background:var(--active);border:0;transform:none}
.suggestions .suggestion:hover svg{color:var(--ink)}
.suggestion .sg-text{flex:none}
@media(max-width:560px){.suggestions{flex-direction:column;align-items:stretch;width:auto}.suggestions .suggestion{width:100%}}
/* ===== composer: quoted reply chip ===== */
.quote-bar{display:flex;align-items:center;gap:10px;margin:0 0 8px;padding:7px 6px 7px 10px;border:1px solid var(--line);border-left:3px solid var(--blue);background:var(--soft);border-radius:10px}
.quote-icon{display:grid;place-items:center;color:var(--muted);margin:0}
.quote-body{min-width:0;flex:1;display:flex;align-items:baseline;gap:8px}
.quote-label{flex:none;margin:0;font-size:var(--fs-cap);font-weight:600;color:var(--muted);white-space:nowrap}
.quote-text{min-width:0;flex:1;display:block;-webkit-line-clamp:unset;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:var(--fs-ui);color:var(--ink)}
.quote-bar .icon-button{width:28px;height:28px;min-width:28px;min-height:28px;padding:0;display:grid;place-items:center;border-radius:50%;color:var(--muted)}
.quote-bar .icon-button:hover{background:var(--active);color:var(--ink)}
@media(max-width:560px){.quote-label{display:none}}

/* ===== language switch (segmented radiogroup; drives hidden #locale select) ===== */
.lang-switch{display:inline-flex;align-items:center;gap:2px;height:36px;padding:3px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted)}
.lang-switch:hover{border-color:var(--line2)}
.lang-globe{margin:0 5px 0 8px;flex:none;display:block}
.lang-opt{border:0;background:transparent;color:var(--muted);height:28px;padding:0 11px;border-radius:7px;font-size:13px;line-height:1;white-space:nowrap}
.lang-opt:hover{color:var(--ink);background:var(--soft)}
.lang-opt[aria-checked=true]{background:var(--active);color:var(--ink);font-weight:550}
.lang-opt:focus-visible{outline-offset:1px}
.lang-short{display:none}
@media(max-width:760px){.lang-full{display:none}.lang-short{display:inline;font-size:12px;letter-spacing:.4px}.lang-globe{display:none}.lang-opt{padding:0 9px}.lang-switch{height:34px}}

/* Chat deletion */
.chat-row{position:relative;display:flex;align-items:center}
.chat-row .chat-item{flex:1;min-width:0;width:100%;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:40px}
.chat-del{position:absolute;right:4px;top:50%;transform:translateY(-50%);height:28px;min-width:28px;padding:0;display:inline-flex;align-items:center;justify-content:center;gap:4px;border:0;border-radius:7px;background:transparent;color:var(--muted);cursor:pointer;opacity:0;transition:opacity .15s,background .15s}
.chat-row:hover .chat-del,.chat-row:focus-within .chat-del,.chat-del.confirm{opacity:1}
@media(hover:none){.chat-del{opacity:.75}}
.chat-del:hover{background:var(--soft);color:var(--ink)}
.chat-del:focus-visible,.chat-clear:focus-visible{outline:2px solid var(--line2);outline-offset:1px}
.chat-del.confirm{padding:0 8px;font-size:12px;background:#b3261e;color:#fff}
.chat-del:disabled,.chat-clear:disabled{cursor:default;opacity:.35}
.chat-clear{margin:10px 0 0;padding:8px 12px;display:flex;align-items:center;gap:8px;width:100%;border:0;border-radius:8px;background:transparent;color:var(--muted);font-size:12.5px;cursor:pointer;text-align:left}
.chat-clear:hover{background:var(--soft);color:var(--ink)}
.chat-clear.confirm{background:#b3261e;color:#fff}