:root {
  --bg: #1b1c1f; --panel: #232428; --panel-head: #2a2b30; --border: #3a3b42;
  --fg: #e6e6e6; --muted: #9a9ba3; --accent: #3e8ef7; --accent-hover: #5a9ef8;
  --ins: #1f6b3a; --del: #7a2a2a; --err: #ff6b6b; --ok: #4cd97b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.45 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }

/* toolbar */
.bar { display: flex; align-items: center; gap: 12px; padding: 0 16px; height: 48px; background: #121316; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1; }
.logo { font-weight: 700; font-size: 16px; letter-spacing: -.2px; color: inherit; text-decoration: none; }
.logo span { color: var(--accent); }
.tag { color: var(--muted); font-size: 12px; display: none; }
@media (min-width: 720px) { .tag { display: inline; } }
.spacer { flex: 1; }

/* nav tabs */
nav.tabs { display: flex; align-self: stretch; }
nav.tabs a { display: flex; align-items: center; padding: 0 10px; color: var(--muted); text-decoration: none; border-bottom: 2px solid transparent; }
nav.tabs a:hover { color: var(--fg); }
nav.tabs a.active, nav.tabs a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }
nav.tabs a.contact { align-self: center; border: 1px solid var(--accent); border-radius: 12px; padding: 2px 10px; color: var(--accent); margin-left: 4px; }
nav.tabs a.contact:hover { background: var(--accent); color: #fff; }
nav.tabs a.contact.active { border-bottom: 1px solid var(--accent); }
@media (max-width: 480px) { .bar { gap: 6px; padding: 0 8px; } nav.tabs a { padding: 0 6px; } }
#apiKey { width: 260px; max-width: 30vw; }

/* controls */
input, button, select, textarea { font: inherit; color: var(--fg); background: var(--panel); border: 1px solid var(--border); border-radius: 4px; padding: 6px 10px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
input::placeholder, textarea::placeholder { color: var(--muted); }
button { cursor: pointer; }
button:hover { background: var(--panel-head); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; padding: 6px 18px; }
button.primary:hover { background: var(--accent-hover); }
button:disabled { opacity: .5; cursor: default; }
label { color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }

main.app { flex: 1; padding: 16px; display: flex; flex-direction: column; gap: 12px; }

/* panels */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; min-width: 0; }
.panel > header { display: flex; align-items: center; gap: 8px; padding: 6px 12px; background: var(--panel-head); border-bottom: 1px solid var(--border); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
.panel > header .name { color: var(--fg); flex-shrink: 0; text-transform: none; letter-spacing: 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.panel > header .stats { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.badge { font: 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; text-transform: none; letter-spacing: 0; padding: 3px 7px; border-radius: 10px; background: var(--border); color: var(--fg); white-space: nowrap; }
.badge.ok { background: #1f6b3a; color: #dfffe8; }
.badge.warn { background: #7a5a12; color: #ffe9b3; }
.badge.bad { background: var(--del); color: #ffd9d9; }
.badge.info { background: #1f3f6b; color: #d6e6ff; }
.badge.cost { background: #4a2a6b; color: #ecd9ff; }
.panel > header .row { margin-left: auto; }
textarea#prompt { display: block; width: 100%; min-height: 140px; border: 0; border-radius: 0; background: transparent; resize: vertical; padding: 12px; font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.models { padding: 8px 12px; border-top: 1px solid var(--border); }
#pick { width: 300px; max-width: 100%; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: var(--panel-head); border: 1px solid var(--border); border-radius: 12px; padding: 2px 10px; font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; cursor: pointer; }
.chip::after { content: "×"; color: var(--muted); }
.chip:hover { border-color: var(--err); }
.chip:hover::after { color: var(--err); }

#out { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 12px; }
.col pre { white-space: pre-wrap; word-break: break-word; margin: 0; padding: 12px; font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.col .err { color: var(--err); }
.col.base { border-color: var(--accent); }
.col.base > header { color: var(--accent); }
ins { background: var(--ins); color: #fff; text-decoration: none; border-radius: 2px; }
del { background: var(--del); color: #fff; border-radius: 2px; }
.empty { color: var(--muted); text-align: center; padding: 48px 12px; grid-column: 1 / -1; }

/* prose pages (guide, blog) */
main.prose { max-width: 760px; width: 100%; margin: 32px auto; padding: 0 16px; }
.prose h1 { font-size: 26px; line-height: 1.25; margin: 0 0 8px; }
.prose h2 { font-size: 20px; margin: 28px 0 8px; }
.prose h3 { font-size: 16px; margin: 20px 0 6px; }
.prose p, .prose li { line-height: 1.6; }
.prose a { color: var(--accent); }
.prose code, .prose pre { font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--panel); border-radius: 4px; }
.prose code { padding: 1px 5px; }
.prose pre { padding: 12px; overflow-x: auto; border: 1px solid var(--border); }
.prose pre code { padding: 0; background: none; }
.prose blockquote { margin: 12px 0; padding: 4px 12px; color: var(--muted); border-left: 3px solid var(--accent); }
.prose table { border-collapse: collapse; width: 100%; margin: 12px 0; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; vertical-align: top; }
.prose th { background: var(--panel-head); }
.prose .meta { color: var(--muted); font-size: 12px; margin-bottom: 20px; }
.prose .card { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 12px; margin-bottom: 12px; }
.prose .card h2, .prose .card h3 { margin: 0 0 4px; }
.prose .card a { color: var(--accent); text-decoration: none; }
.prose .card p { margin: 4px 0 0; }

/* contact form */
main.contact { max-width: 560px; width: 100%; margin: 32px auto; padding: 0 16px; }
form.contact { display: grid; gap: 10px; padding: 12px; }
form.contact input, form.contact textarea { width: 100%; background: var(--bg); padding: 8px 10px; }
form.contact textarea { min-height: 160px; resize: vertical; }
form.contact button { width: auto; justify-self: end; padding: 8px 18px; }
#status { color: var(--muted); min-height: 1.4em; }
#status.ok { color: var(--ok); } #status.err { color: var(--err); }
.hp { position: absolute; left: -9999px; }