:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body{color:#111827;background:#f5f7fa;margin:0;padding:0;font-family:Inter,Arial,sans-serif}main{max-width:960px;margin:0 auto;padding:16px}.panel{background:#fff;border:1px solid #d1d5db;border-radius:8px;padding:12px}.chat-log{gap:8px;min-height:320px;max-height:50vh;display:grid;overflow:auto}.row{gap:8px;display:grid}.message{border:1px solid #e5e7eb;border-radius:8px;padding:10px}.message.user{background:#eff6ff}.message.assistant{background:#f9fafb}textarea{resize:vertical;width:100%;min-height:96px}button{color:#fff;cursor:pointer;background:#111827;border:1px solid #1f2937;border-radius:6px;padding:8px 12px}button:disabled{opacity:.55;cursor:not-allowed}