:root { color-scheme: light; font-family: system-ui, Segoe UI, sans-serif; }
body { margin: 0; background: #f5f6f8; color: #1e2329; }
header { height: 52px; display: flex; align-items: center; gap: 18px; padding: 0 18px; background: #151923; color: white; }
header form { margin-left: auto; }
button { border: 1px solid #b8c0cc; background: white; padding: 8px 12px; border-radius: 6px; cursor: pointer; }
.layout { display: grid; grid-template-columns: 250px 1fr; height: calc(100vh - 52px); }
aside { border-right: 1px solid #d9dee6; padding: 14px; background: #fff; display: flex; flex-direction: column; gap: 12px; }
section { display: grid; grid-template-rows: 1fr auto auto auto; min-width: 0; }
#messages { overflow: auto; padding: 18px; }
article { max-width: 980px; margin: 0 auto 14px; padding: 12px 14px; border: 1px solid #d9dee6; background: white; border-radius: 8px; }
article.user { background: #eef4ff; }
pre { overflow: auto; padding: 12px; background: #10141c; color: #e9edf5; border-radius: 6px; }
code { font-family: ui-monospace, Consolas, monospace; }
#composer { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 12px; background: white; border-top: 1px solid #d9dee6; }
#message, input { font: inherit; padding: 10px; border: 1px solid #b8c0cc; border-radius: 6px; }
#status { min-height: 22px; padding: 0 14px 8px; color: #576071; }
#confirm { margin: 0 12px 8px; padding: 12px; border: 1px solid #c99731; background: #fff7e6; border-radius: 8px; }
.login { display: grid; place-items: center; min-height: 100vh; }
.login-panel { width: 340px; padding: 24px; background: white; border: 1px solid #d9dee6; border-radius: 8px; }
.login-panel form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; }