:root { --c: #f97316; --t: #111827; --m: #6b7280; --b: #e5e7eb; }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.7 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--t); background: #fffbeb; }
a { color: var(--c); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { background: #fff; border-bottom: 1px solid var(--b); position: sticky; top: 0; z-index: 10; }
nav { display: flex; gap: 16px; align-items: center; height: 56px; }
nav a { text-decoration: none; color: var(--t); }
.logo { font-weight: 800; font-size: 20px; margin-right: auto; }
.btn, button { display: inline-block; background: var(--c); color: #fff !important; border: 0; border-radius: 8px; padding: 8px 16px; font: inherit; text-decoration: none; cursor: pointer; }
button:disabled { opacity: .5; }
.hero { text-align: center; padding: 40px 0 24px; }
.hero h1 { font-size: 2rem; line-height: 1.3; margin: 0 0 8px; }
.card { background: #fff; border: 1px solid var(--b); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.card h2 { margin: 0; font-size: 1.25rem; line-height: 1.4; }
.card a { text-decoration: none; color: var(--t); }
.card p { margin: 6px 0; color: var(--m); }
small, .note { color: var(--m); font-size: 14px; }
.post { background: #fff; border: 1px solid var(--b); border-radius: 12px; padding: 8px 24px 24px; margin: 24px 0; }
.post h1 { line-height: 1.3; }
.cta { background: #ffedd5; border-radius: 12px; padding: 16px 20px; margin: 24px 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chips button { background: #fff; color: var(--t) !important; border: 1px solid var(--b); border-radius: 999px; padding: 6px 12px; font-size: 14px; }
#log { display: flex; flex-direction: column; gap: 12px; min-height: 20vh; padding: 16px 0; }
.msg { white-space: pre-wrap; padding: 10px 14px; border-radius: 12px; max-width: 90%; }
.msg.user { align-self: flex-end; background: var(--c); color: #fff; }
.msg.assistant { align-self: flex-start; background: #fff; border: 1px solid var(--b); }
.msg.error { color: #b91c1c; }
#f { display: flex; gap: 8px; position: sticky; bottom: 0; background: #fffbeb; padding: 8px 0; }
#f textarea { flex: 1; font: inherit; padding: 8px 12px; border: 1px solid var(--b); border-radius: 8px; resize: vertical; }
footer { color: var(--m); font-size: 14px; padding: 32px 16px; text-align: center; }
@media (max-width: 520px) { .hero h1 { font-size: 1.6rem; } }
.share { align-self: flex-start; margin-top: -6px; background: transparent; color: var(--c) !important; border: 1px solid var(--c); border-radius: 999px; padding: 2px 12px; font-size: 14px; }
#log > * { scroll-margin-bottom: 110px; }