:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}body{margin:0}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}*{box-sizing:border-box}body{color:#111827;background:#f4f6fb;margin:0;font-family:Arial,Helvetica,sans-serif}.app{min-height:100vh}.app-header{color:#fff;background:linear-gradient(135deg,#111827,#2563eb);padding:28px 44px}.app-header h1{margin:0;font-size:32px}.app-header p{color:#dbeafe;margin-top:8px}.app-layout{grid-template-columns:360px 1fr;gap:24px;padding:28px 44px;display:grid}.left-panel,.right-panel{min-height:650px}.upload-card,.info-card,.chat-card{background:#fff;border-radius:18px;padding:22px;box-shadow:0 10px 30px #0f172a14}.upload-card h2,.chat-card h2{margin-top:0}.helper-text{color:#6b7280;font-size:14px}input[type=file]{background:#f8fafc;border:1px dashed #94a3b8;border-radius:12px;width:100%;margin-top:14px;padding:12px}button{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:12px;padding:12px 18px;font-size:14px;font-weight:700}button:disabled{cursor:not-allowed;background:#94a3b8}.secondary-btn{background:#6b7280}.file-name{color:#2563eb;margin-top:12px;font-size:14px}.upload-card button{width:100%;margin-top:16px}.upload-message{color:#047857;margin-top:14px;font-size:14px}.info-card{margin-top:20px}.success-text{color:#047857;font-weight:600}.warning-text{color:#b45309;font-weight:600}.chat-card{flex-direction:column;height:720px;display:flex}.chat-header{justify-content:space-between;align-items:center;display:flex}.chat-header p{color:#6b7280;margin:6px 0 0}.chat-body{background:#f9fafb;border:1px solid #e5e7eb;border-radius:14px;flex:1;margin:18px 0;padding:18px;overflow-y:auto}.empty-state{text-align:center;color:#6b7280;margin-top:100px}.empty-state ul{padding-left:0;list-style-position:inside}.message{white-space:pre-wrap;border-radius:14px;max-width:88%;margin-bottom:16px;padding:14px}.user-message{background:#dbeafe;margin-left:auto}.assistant-message{background:#fff;border:1px solid #e5e7eb;margin-right:auto}.message-role{color:#111827;margin-bottom:6px;font-weight:800}.message-text{line-height:1.6}.sources{border-top:1px solid #e5e7eb;margin-top:14px;padding-top:12px}.sources h4{color:#1d4ed8;margin:0 0 10px}.source-card{background:#f3f4f6;border-radius:10px;margin-top:8px;padding:10px;font-size:13px}.source-card p{margin-bottom:0;line-height:1.5}.chat-input-row{gap:12px;display:flex}.chat-input-row textarea{resize:none;border:1px solid #d1d5db;border-radius:14px;flex:1;min-height:76px;padding:14px;font-size:15px}.chat-input-row button{min-width:100px}@media (width<=900px){.app-header{padding:24px}.app-layout{grid-template-columns:1fr;padding:20px}.chat-card{height:680px}}