:root{--bg: #ffffff;--surface: #f7f8fa;--border: #e5e7eb;--border-strong: #d1d5db;--ink: #111827;--ink-muted: #6b7280;--accent: #c8102e;--accent-soft: #fbe9ec;--accent-ink: #8b0a1f;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;--shell-max: 760px;--text-max: 680px;color-scheme:light;font-family:var(--font-sans);font-size:15px;line-height:1.55;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg)}button{font:inherit;color:inherit;cursor:pointer}button:disabled{cursor:not-allowed}.app{display:flex;flex-direction:column;min-height:100vh;max-width:var(--shell-max);margin:0 auto;padding:0 24px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0 16px;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{color:var(--accent);display:inline-flex;align-items:center;justify-content:center}.brand-text{display:flex;flex-direction:column;line-height:1.2}.brand-title{font-weight:600;font-size:17px;letter-spacing:-.005em}.brand-subtitle{font-size:12px;color:var(--ink-muted);margin-top:2px}.btn-ghost{background:transparent;border:1px solid transparent;color:var(--ink-muted);padding:6px 12px;border-radius:6px;font-size:13px;transition:border-color .15s,color .15s}.btn-ghost:hover:not(:disabled){border-color:var(--border);color:var(--ink)}.btn-ghost:disabled{opacity:.5}.btn-primary{background:var(--accent);color:#fff;border:none;padding:8px 18px;border-radius:6px;font-weight:500;font-size:14px;transition:background .15s}.btn-primary:hover:not(:disabled){background:var(--accent-ink)}.btn-primary:disabled{background:var(--border-strong)}.disclaimer{display:flex;align-items:flex-start;gap:12px;margin:16px 0 8px;padding:10px 12px 10px 14px;border:1px solid var(--border);border-left:2px solid var(--accent);border-radius:4px;background:var(--bg)}.disclaimer-body{flex:1;font-size:12.5px;color:var(--ink-muted);line-height:1.5}.disclaimer-body strong{color:var(--ink);font-weight:600}.disclaimer-dismiss{background:transparent;border:none;color:var(--ink-muted);font-size:20px;line-height:1;padding:0 4px;align-self:flex-start}.disclaimer-dismiss:hover{color:var(--ink)}.transcript{flex:1;display:flex;flex-direction:column;gap:0;padding:24px 0 8px}.entry{padding:18px 0 22px 16px;margin-bottom:6px;border-left:2px solid var(--border-strong);max-width:var(--text-max)}.entry-user{border-left-color:var(--accent)}.entry-assistant{border-left-color:var(--border-strong)}.entry-pending .entry-label{color:var(--ink)}.entry-label{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted);margin-bottom:10px}.pulse-mark{color:var(--accent);display:inline-flex;animation:pulse 1.3s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.35}50%{opacity:1}}.entry-body{white-space:pre-wrap;color:var(--ink);font-size:15px}.user-body{font-size:15px}.shimmer{color:var(--ink-muted);font-style:italic}.assistant-body{color:var(--ink);font-size:15px}.assistant-body p{margin:0 0 12px}.assistant-body p:last-child{margin-bottom:0}.assistant-body h1,.assistant-body h2,.assistant-body h3{font-weight:600;letter-spacing:-.01em;margin:18px 0 8px;line-height:1.25}.assistant-body h1{font-size:20px}.assistant-body h2{font-size:17px}.assistant-body h3{font-size:15px}.assistant-body ul,.assistant-body ol{margin:0 0 12px;padding-left:22px}.assistant-body li{margin:4px 0}.assistant-body strong{font-weight:600}.assistant-body code{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:.92em;background:var(--surface);padding:1px 5px;border-radius:3px;border:1px solid var(--border)}.assistant-body pre{background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:10px 12px;overflow-x:auto;font-size:12.5px}.assistant-body blockquote{font-family:var(--font-serif);font-size:15.5px;color:var(--ink);border-left:2px solid var(--border-strong);margin:12px 0;padding:2px 14px;font-style:italic}.assistant-body a{color:var(--accent-ink);text-decoration:underline;text-underline-offset:2px}.source-trace{margin:0 0 14px}.source-trace-label,.assistant-sources-label{font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted);margin-bottom:6px}.source-trace-chips,.assistant-sources-chips{display:flex;flex-wrap:wrap;gap:6px}.source-chip{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:11px;background:var(--accent-soft);color:var(--accent-ink);padding:3px 8px;border-radius:4px;border:1px solid transparent;transition:border-color .15s}button.source-chip{cursor:pointer}button.source-chip:hover,.source-chip-active{border-color:var(--accent)}.source-trace-preview{margin-top:8px;padding:10px 12px;border:1px solid var(--border);border-radius:4px;background:var(--surface)}.source-trace-preview-label{font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted);margin-bottom:4px}.source-trace-preview pre{margin:0;font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:11.5px;color:var(--ink);white-space:pre-wrap;word-break:break-word}.assistant-sources{margin-top:16px;padding-top:12px;border-top:1px solid var(--border)}.empty{max-width:var(--text-max);padding:40px 0 24px;text-align:left}.empty-mark{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:50%;background:var(--accent-soft);color:var(--accent);margin-bottom:16px}.empty-title{font-size:20px;font-weight:600;letter-spacing:-.01em;margin-bottom:6px}.empty-sub{color:var(--ink-muted);margin-bottom:20px;font-size:14px}.starter-chips{display:flex;flex-wrap:wrap;gap:8px}.starter-chip{background:var(--bg);border:1px solid var(--border);color:var(--ink);font-size:13px;padding:8px 14px;border-radius:999px;transition:border-color .15s,background .15s,color .15s}.starter-chip:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-ink)}.error-card{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;margin:16px 0;background:var(--accent-soft);border:1px solid var(--border);border-left:2px solid var(--accent);border-radius:4px;max-width:var(--text-max)}.error-icon{color:var(--accent);display:inline-flex;margin-top:1px}.error-title{font-weight:600;color:var(--accent-ink);font-size:14px}.error-message{color:var(--ink);font-size:13px;margin-top:2px;word-break:break-word}.composer-wrap{padding:12px 0 20px;position:sticky;bottom:0;background:linear-gradient(to bottom,rgba(255,255,255,0),var(--bg) 16px)}.composer{border:1px solid var(--border-strong);border-radius:8px;background:var(--bg);padding:10px 12px 8px;transition:border-color .15s,box-shadow .15s}.composer:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.composer textarea{width:100%;border:none;outline:none;resize:none;background:transparent;font:inherit;font-size:15px;color:var(--ink);padding:4px 2px}.composer textarea::placeholder{color:var(--ink-muted)}.composer textarea:disabled{opacity:.6}.composer-row{display:flex;justify-content:space-between;align-items:center;margin-top:4px}.composer-hint{font-size:11.5px;color:var(--ink-muted);font-variant-numeric:tabular-nums}@media (max-width: 600px){.app{padding:0 16px}.brand-subtitle,.composer-hint{display:none}}