:root { color-scheme: light dark; --fg: #1d2330; --bg: #f7f8fa; --muted: #5b6475; --accent: #2457c5; --card: #fff; --line: #d6dae3; --warn: #8a4b00; }
@media (prefers-color-scheme: dark) { :root { --fg: #e6e9f0; --bg: #14171f; --muted: #9aa3b5; --accent: #7aa2ff; --card: #1c212c; --line: #2f3646; --warn: #ffb35c; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; }
main { max-width: 52rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
label { display: block; font-weight: 600; margin-bottom: .25rem; }
textarea { width: 100%; padding: .6rem; font: inherit; color: inherit; background: var(--card); border: 1px solid var(--line); border-radius: 6px; resize: vertical; }
button { margin-top: .6rem; padding: .5rem 1.2rem; font: inherit; color: #fff; background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; }
@media (prefers-color-scheme: dark) { button { color: #0b1020; } }
button:disabled { opacity: .5; cursor: default; }
#answer { white-space: pre-wrap; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: .8rem; margin-top: 1rem; }
#answer:empty { display: none; }
#no-answer { color: var(--warn); font-weight: 600; }
#sources { padding-left: 1.4rem; }
#sources li { margin-bottom: .6rem; }
.meta { display: block; color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }
#status { color: var(--muted); min-height: 1.5em; }
#status.error { color: var(--warn); }
[hidden] { display: none !important; }