:root {
  --navy:#132b46; --navy2:#0b1d31; --blue:#2878b8; --pale:#eaf4fb;
  --gold:#b78a2c; --ink:#182433; --muted:#617083; --line:#dce4ec;
  --surface:#fff; --soft:#f4f7fa; --danger:#972e2e;
  --shadow:0 22px 55px rgba(11,29,49,.12);
}
*{box-sizing:border-box}
html,body{height:100%;min-height:0}
body{margin:0;color:var(--ink);background:var(--soft);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.5}
button,input,textarea{font:inherit}
button{cursor:pointer}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.eyebrow{margin:0;color:var(--gold);font-size:.72rem;font-weight:800;letter-spacing:.11em}
.brand-mark{display:grid;width:58px;height:58px;place-items:center;border:1px solid rgba(183,138,44,.45);border-radius:15px;color:#fff;background:var(--navy);font-family:Georgia,"Times New Roman",serif;font-size:1.35rem;letter-spacing:.04em;box-shadow:0 10px 22px rgba(19,43,70,.22)}
.brand-mark.small{width:44px;height:44px;border-radius:12px;font-size:1rem;box-shadow:none}

.login-page{min-height:100%;background:radial-gradient(circle at top left,rgba(40,120,184,.15),transparent 34rem),linear-gradient(145deg,#f7fafc,#edf3f8)}
.login-shell{min-height:100%;display:grid;place-items:center;padding:28px}
.login-card{width:min(100%,430px);padding:42px;border:1px solid rgba(220,228,236,.9);border-radius:24px;background:rgba(255,255,255,.97);box-shadow:var(--shadow)}
.login-card .brand-mark{margin-bottom:28px}
.login-card h1{margin:5px 0 8px;color:var(--navy2);font-size:2.25rem}
.login-copy{margin:0 0 28px;color:var(--muted)}
.login-card label{display:block;margin-bottom:8px;font-size:.9rem;font-weight:700}
.login-card input{width:100%;min-height:50px;padding:12px 14px;border:1px solid #b9c7d4;border-radius:11px;outline:none;background:#fff}
.login-card input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(40,120,184,.13)}
.alert{margin:18px 0;padding:12px 14px;border-radius:10px;color:var(--danger);background:#fff0f0;font-size:.92rem}
.powered-by{margin:30px 0 0;color:#8995a3;font-size:.68rem;font-weight:800;letter-spacing:.15em;text-align:center}

.primary-button,.secondary-button,.send-button{border:0;border-radius:10px;font-weight:750;transition:transform .12s ease,background .12s ease}
.primary-button,.send-button{color:#fff;background:var(--navy)}
.primary-button{min-height:50px;padding:12px 18px}
.full-width{width:100%;margin-top:16px}
.primary-button:hover,.send-button:hover{background:var(--navy2)}
.primary-button:active,.send-button:active{transform:translateY(1px)}

.app-page{height:100%;min-height:0;overflow:hidden;background:#edf2f7}
.app-shell{height:100vh;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;overflow:hidden}
@supports(height:100dvh){.app-shell{height:100dvh}}
.app-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px clamp(18px,4vw,48px);border-bottom:1px solid var(--line);background:rgba(255,255,255,.97);backdrop-filter:blur(12px);box-shadow:0 3px 12px rgba(11,29,49,.04)}
.brand-lockup{display:flex;align-items:center;gap:13px;min-width:0}
.brand-lockup h1{margin:1px 0 0;color:var(--navy2);font-size:1.2rem;line-height:1.1}
.sub-brand{margin:3px 0 0;color:var(--muted);font-size:.72rem}
.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.secondary-button{min-height:40px;padding:9px 14px;border:1px solid #bcc9d6;color:var(--navy);background:#fff}
.secondary-button:hover{border-color:var(--blue);background:var(--pale)}
.text-button{min-height:40px;padding:9px 12px;border:0;color:var(--muted);background:transparent}
.text-button:hover{color:var(--navy)}

.chat{height:100%;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;padding:38px clamp(16px,4vw,48px) 30px}
.welcome-card,.messages{width:min(100%,940px);margin-inline:auto}
.welcome-card{padding:clamp(24px,5vw,42px);border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 18px 45px rgba(11,29,49,.07)}
.welcome-card h2{max-width:720px;margin:7px 0 8px;color:var(--navy2);font-size:clamp(1.65rem,4vw,2.45rem);line-height:1.12}
.welcome-card>p:not(.eyebrow){margin:0;color:var(--muted)}
.prompt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:28px}
.prompt-chip{padding:13px 14px;border:1px solid var(--line);border-radius:12px;color:var(--navy);background:#f9fbfd;text-align:left}
.prompt-chip:hover{border-color:#8eb7d6;background:var(--pale)}

.messages{min-width:0;display:flex;flex-direction:column;gap:22px}
.message{display:flex;gap:12px;width:100%;min-width:0}
.message.user{justify-content:flex-end}
.message-bubble{max-width:min(84%,780px);min-width:0}
.message.user .message-bubble{padding:13px 16px;border-radius:17px 17px 4px 17px;color:#fff;background:var(--navy);box-shadow:0 8px 20px rgba(19,43,70,.16)}
.message.assistant .message-bubble{width:min(100%,860px);max-width:100%;padding:22px;border:1px solid var(--line);border-radius:4px 17px 17px 17px;background:var(--surface);box-shadow:0 11px 28px rgba(11,29,49,.06)}
.message.error .message-bubble{padding:14px 16px;border:1px solid #e9baba;border-radius:12px;background:#fff7f7;color:var(--danger)}
.role-label{margin-bottom:8px;color:var(--gold);font-size:.68rem;font-weight:800;letter-spacing:.1em}
.markdown-body{overflow-wrap:anywhere}
.markdown-body>:first-child{margin-top:0}
.markdown-body>:last-child{margin-bottom:0}
.markdown-body h1,.markdown-body h2,.markdown-body h3{color:var(--navy2);line-height:1.24}
.markdown-body h1{font-size:1.55rem}
.markdown-body h2{margin-top:1.5em;font-size:1.3rem}
.markdown-body h3{margin-top:1.3em;font-size:1.1rem}
.markdown-body p,.markdown-body li{color:#2b3948}
.markdown-body a{color:var(--blue)}
.markdown-body code{padding:.12em .35em;border-radius:5px;background:#eef3f7}
.markdown-body pre{overflow-x:auto;padding:14px;border-radius:10px;background:#edf2f6}
.markdown-body blockquote{margin-left:0;padding-left:14px;border-left:4px solid var(--gold);color:var(--muted)}
.markdown-body table,.result-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.91rem}
.markdown-body th,.markdown-body td,.result-table th,.result-table td{padding:10px 11px;border:1px solid var(--line);text-align:left;vertical-align:top}
.markdown-body th,.result-table th{color:var(--navy2);background:#f1f5f9;font-weight:750}

.chart-stack{display:grid;gap:14px;margin-top:20px}
.chart-card{min-width:0;overflow:hidden;padding:14px;border:1px solid var(--line);border-radius:13px;background:#fbfdff}
.chart-card .vega-embed{width:100%;overflow-x:auto}
.chart-card svg{max-width:100%}
.chart-error{color:var(--muted);font-size:.85rem}
.supporting-data{margin-top:18px;border-top:1px solid var(--line)}
.supporting-data details{padding-top:14px}
.supporting-data summary{color:var(--navy);font-weight:750;cursor:pointer}
.result-block{margin-top:16px;overflow-x:auto}
.result-title{margin:0 0 8px;color:var(--navy2);font-size:.94rem}
.result-note{color:var(--muted);font-size:.8rem}
.response-meta{margin:16px 0 0;padding-top:12px;border-top:1px solid #edf1f5;color:#7d8997;font-size:.75rem}

.working-bubble{min-width:min(100%,360px)}
.working-status{margin:-2px 0 8px;color:var(--muted);font-size:.82rem}
.typing{display:inline-flex;align-items:center;gap:5px;min-height:24px}
.typing span{width:7px;height:7px;border-radius:999px;background:#8393a5;animation:pulse 1.2s infinite ease-in-out}
.typing span:nth-child(2){animation-delay:.15s}
.typing span:nth-child(3){animation-delay:.3s}
@keyframes pulse{0%,70%,100%{transform:translateY(0);opacity:.45}35%{transform:translateY(-4px);opacity:1}}

.composer-shell{position:sticky;bottom:0;z-index:18;padding:14px clamp(16px,4vw,48px) 18px;border-top:1px solid var(--line);background:rgba(255,255,255,.98);box-shadow:0 -6px 18px rgba(11,29,49,.04)}
.composer{width:min(100%,940px);margin:0 auto;display:flex;align-items:flex-end;gap:10px;padding:9px;border:1px solid #bfcbd7;border-radius:16px;background:#fff;box-shadow:0 12px 30px rgba(11,29,49,.08)}
.composer:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(40,120,184,.1),0 12px 30px rgba(11,29,49,.08)}
.composer textarea{flex:1;max-height:180px;min-height:46px;padding:11px 10px;resize:none;border:0;outline:0;color:var(--ink);background:transparent}
.send-button{min-width:76px;min-height:44px;padding:10px 15px}
.send-button:disabled,.primary-button:disabled,.secondary-button:disabled{cursor:not-allowed;opacity:.55}
.composer-note{width:min(100%,940px);margin:8px auto 0;color:#7d8997;font-size:.73rem;text-align:center}

@media(max-width:760px){
  .app-header{align-items:center;padding:12px 14px}
  .brand-lockup .eyebrow,.sub-brand{display:none}
  .brand-lockup h1{margin-top:0}
  .brand-mark.small{width:38px;height:38px}
  .text-button{padding-inline:7px}
  .secondary-button{padding-inline:10px}
  .prompt-grid{grid-template-columns:1fr}
  .chat{padding-top:22px}
  .message-bubble{max-width:93%}
  .message.assistant .message-bubble{padding:17px}
  .markdown-body table,.result-table{font-size:.82rem}
  .composer-shell{padding-bottom:max(12px,env(safe-area-inset-bottom))}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

.progress-copy{margin-top:7px;color:var(--muted);font-size:.88rem}
.response-time{margin:16px 0 0;padding-top:10px;border-top:1px solid var(--line);color:#8290a0;font-size:.72rem}
.chart-card svg{max-width:100%;height:auto}
.composer-meta-row{width:min(100%,940px);margin:7px auto 0;display:flex;align-items:center;justify-content:center;gap:14px;position:relative}
.composer-meta-row .composer-note{width:auto;margin:0}
.footer-new-chat{position:absolute;right:0;padding:3px 2px;border:0;color:var(--navy);background:transparent;font-size:.75rem;font-weight:750}
.footer-new-chat:hover{text-decoration:underline}
.footer-new-chat:disabled{cursor:not-allowed;opacity:.5}
@media(max-width:620px){.composer-meta-row{justify-content:space-between}.footer-new-chat{position:static}.composer-meta-row .composer-note{text-align:left}}
.simple-chart{display:grid;gap:10px}
.simple-chart-title{margin:0 0 4px;color:var(--navy2);font-size:1rem}
.simple-chart-row{display:grid;grid-template-columns:minmax(145px,2fr) minmax(120px,5fr) minmax(54px,auto);align-items:center;gap:10px}
.simple-chart-label{overflow:hidden;color:#344457;font-size:.82rem;text-overflow:ellipsis;white-space:nowrap}
.simple-chart-track{height:14px;overflow:hidden;border-radius:999px;background:#e8eef4}
.simple-chart-bar{height:100%;border-radius:999px;background:var(--blue)}
.simple-chart-value{color:var(--navy2);font-size:.82rem;font-weight:750;text-align:right}
@media(max-width:620px){.simple-chart-row{grid-template-columns:1fr auto}.simple-chart-track{grid-column:1/-1;grid-row:2}.simple-chart-value{grid-column:2;grid-row:1}}