:root{color-scheme:dark;--bg:#081827;--rail:#0b1e30;--panel:#10263a;--panel2:#132d43;--text:#f4f7fb;--muted:#b9c9d8;--border:#47657f;--blue:#1686c9;--focus:#ffbe2e;font-family:"Public Sans",system-ui,sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}button,input,textarea{font:inherit;color:inherit}button,a,input,textarea{border-radius:8px}.skip-link{position:fixed;top:-5rem;left:1rem;background:var(--focus);color:#111;padding:.75rem;z-index:20}.skip-link:focus{top:1rem}.ai-app{min-height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr)}.ai-rail{height:100vh;position:sticky;top:0;display:flex;flex-direction:column;padding:1rem;background:var(--rail);border-right:1px solid var(--border);overflow:auto}.rail-brand{display:flex;align-items:baseline;gap:.65rem;margin-bottom:1rem}.rail-brand a{font-size:1.25rem;font-weight:800;color:var(--text);text-decoration:none}.rail-brand span,.ai-header span,.status,.composer-help{color:var(--muted);font-size:.86rem}.new-chat{min-height:46px;background:var(--blue);border:0;font-weight:800;text-align:left;padding:.7rem 1rem;cursor:pointer}.search-label{margin-top:1rem;font-size:.8rem;color:var(--muted)}#conversationSearch{width:100%;min-height:44px;margin:.35rem 0 1rem;padding:.65rem .75rem;background:var(--panel);border:1px solid var(--border)}.ai-rail h2{font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:1rem .4rem .4rem}.conversation-list{display:grid;gap:.25rem}.conversation-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.3rem;align-items:center;padding:.15rem}.conversation-open{min-height:42px;border:0;background:transparent;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer}.conversation-item.active,.conversation-item:hover{background:var(--panel);border-radius:8px}.conversation-menu{border:0;background:transparent;cursor:pointer;min-width:36px;min-height:36px}.rail-empty{color:var(--muted);font-size:.82rem;padding:.5rem}.rail-bottom{margin-top:auto;padding-top:1rem;border-top:1px solid var(--border);display:grid;gap:.25rem}.rail-bottom a,.ai-header a{color:var(--text);text-decoration:none;padding:.7rem}.rail-bottom a:hover,.rail-bottom a:focus-visible,.ai-header a:hover{background:var(--panel2)}.ai-main{min-width:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:100vh}.ai-header{min-height:64px;padding:.75rem 1.25rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:1rem;background:rgba(8,24,39,.96)}.ai-header div{display:grid}.ai-header a{margin-left:auto}.rail-toggle{display:none;border:1px solid var(--border);background:var(--panel)}.conversation{overflow:auto;padding:clamp(1rem,4vw,3rem)}.empty-state{max-width:780px;margin:8vh auto 2rem;text-align:center}.eyebrow{color:#5ab9f0;font-weight:800;letter-spacing:.08em;font-size:.78rem}.empty-state h1{font-family:"Source Serif 4",serif;font-size:clamp(2rem,4vw,3.4rem);margin:.5rem 0}.empty-state>p{color:var(--muted);line-height:1.6}.starter-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin-top:2rem}.starter-grid button{min-height:76px;padding:1rem;border:1px solid var(--border);background:var(--panel);text-align:left;cursor:pointer}.message-list{max-width:860px;margin:auto;display:grid;gap:1.25rem}.message{display:grid;grid-template-columns:48px minmax(0,1fr);gap:.8rem;line-height:1.6}.message-avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--panel2);font-weight:800}.message.user .message-body{background:var(--panel2);padding:1rem;border-radius:12px}.message-body{white-space:pre-wrap;overflow-wrap:anywhere}.composer-wrap{padding:.6rem max(1rem,calc((100% - 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.attachment-tray{max-width:900px;margin:0 auto .5rem;display:grid;gap:.4rem}
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.attachment-item button{min-height:36px;padding:.35rem .65rem;background:transparent;border:1px solid var(--border);cursor:pointer}
.composer .add-document{align-self:end;min-width:44px;width:44px;height:44px;padding:0;border:1px solid var(--border);border-radius:50%;background:var(--panel2);font-size:1.6rem;line-height:1}
.composer .add-document:hover{background:#1b4967}
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