:root { color-scheme: light; color: #20272e; background: #fff; font-family: "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
a { color: #245b8f; text-underline-offset: 3px; }
.shell { width: min(820px, calc(100% - 32px)); margin: 0 auto; padding: 24px 0 48px; }
.hero { margin: 32px 0 28px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-size: 34px; line-height: 1.25; }
h2 { margin-bottom: 0; font-size: 21px; }
.disclosure { max-width: 680px; color: #51606e; }
.status-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 14px; }
.status { color: #51606e; }
.status.ready { color: #21633e; }
.version { color: #51606e; }
.conversation { border-top: 1px solid #ccd3db; }
.section-heading { padding: 20px 0; }
.messages { min-height: 160px; max-height: 520px; overflow-y: auto; padding: 0 4px; }
.message { margin-bottom: 20px; padding: 16px; line-height: 1.65; background: #f4f6f8; }
.message p { margin-bottom: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.visitor-message { margin-left: 32px; background: #edf3f9; }
.message-label { margin-bottom: 6px !important; color: #40515f; font-size: 14px; font-weight: 700; }
.evidence { margin-top: 12px !important; color: #51606e; font-size: 14px; }
.feedback { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.feedback-status { flex-basis: 100%; font-size: 14px; }
.composer { padding-top: 16px; border-top: 1px solid #ccd3db; }
.composer label { display: block; margin-bottom: 8px; font-weight: 700; }
textarea { width: 100%; resize: vertical; border: 1px solid #9ba8b5; border-radius: 4px; padding: 12px; background: #fff; color: #20272e; font: inherit; line-height: 1.5; }
.composer-footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 12px; }
.composer-footer span { color: #51606e; font-size: 14px; }
button { min-height: 44px; border: 1px solid #9ba8b5; border-radius: 4px; padding: 8px 14px; background: #fff; color: #20272e; font: inherit; cursor: pointer; }
button[type="submit"] { background: #245b8f; color: #fff; border-color: #245b8f; }
button:disabled { opacity: .6; cursor: not-allowed; }
@media (max-width: 600px) { .shell { padding-top: 16px; } .hero { margin-top: 24px; } .visitor-message { margin-left: 16px; } }