:root {
  --bg: #f6f7fb; --card: #ffffff; --ink: #14161c; --mut: #5b6272; --line: #e3e6ee;
  --acc: #5b5bf0; --acc2: #7c3aed; --ok: #15803d; --me: #5b5bf0; --ai: #eef0f7; --hl: #fff7d6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1016; --card: #161923; --ink: #eceef5; --mut: #9aa2b6; --line: #262b3a; --acc: #8b8bff; --me: #4a4ad8; --ai: #222736; --hl: #3a3416; --ok: #4ade80; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }
.top { background: linear-gradient(120deg, var(--acc), var(--acc2)); color: #fff; padding: 26px 0; }
.top .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.top h1 { margin: 0; font-size: clamp(1.4rem, 4vw, 2rem); }
.tag { margin: 4px 0 0; opacity: .92; }
main { padding-top: 22px; padding-bottom: 20px; display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
h2 { margin: 0 0 8px; font-size: 1.2rem; display: flex; align-items: center; gap: 10px; }
h3 { margin: 22px 0 8px; font-size: 1rem; }
h4 { margin: 0 0 4px; font-size: .95rem; }
.step { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--acc); color: #fff; font-size: .9rem; }
.lead { margin: 0 0 12px; color: var(--mut); }
.fine { color: var(--mut); font-size: .9rem; margin: 4px 0; }
.note { padding: 0 4px; }
code { background: color-mix(in srgb, var(--acc) 14%, transparent); padding: 1px 6px; border-radius: 6px; font-size: .88em; }
.btn { font: inherit; font-weight: 600; cursor: pointer; border: 0; border-radius: 12px; padding: 11px 20px; background: var(--acc); color: #fff; text-decoration: none; display: inline-block; }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: inherit; border: 1px solid color-mix(in srgb, currentColor 35%, transparent); }
.top .btn.ghost { color: #fff; }
.btn.small { padding: 7px 12px; font-size: .88rem; }
.btn:focus-visible, .chip:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; }
.chat { list-style: none; margin: 0; padding: 12px; display: flex; flex-direction: column; gap: 8px; max-height: 300px; overflow-y: auto; background: var(--bg); border-radius: 12px; border: 1px solid var(--line); }
.chat.small { max-height: none; }
.bubble { max-width: 86%; padding: 8px 12px; border-radius: 14px; font-size: .92rem; overflow-wrap: anywhere; }
.bubble .who { display: block; font-size: .72rem; opacity: .7; margin-bottom: 2px; }
.bubble.me { align-self: flex-end; background: var(--me); color: #fff; border-bottom-right-radius: 4px; }
.bubble.ai { align-self: flex-start; background: var(--ai); border-bottom-left-radius: 4px; }
.more { margin-top: 14px; }
summary { cursor: pointer; color: var(--acc); font-weight: 600; }
textarea { width: 100%; min-height: 200px; margin-top: 8px; padding: 12px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: 13px/1.5 ui-monospace, Consolas, monospace; resize: vertical; }
.row { margin-top: 8px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.chip { border: 1px solid var(--line); background: transparent; color: var(--ink); border-radius: 999px; padding: 8px 14px; font: inherit; font-size: .9rem; cursor: pointer; text-align: left; }
.chip:hover { border-color: var(--acc); background: color-mix(in srgb, var(--acc) 8%, transparent); }
.ask { display: flex; gap: 10px; flex-wrap: wrap; }
#query { flex: 1; min-width: 200px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: inherit; }
.big { font-size: clamp(1.6rem, 6vw, 2.4rem); font-weight: 800; margin: 0; color: var(--ok); line-height: 1.15; }
.compare { display: grid; gap: 8px; margin: 12px 0 4px; }
.bar { display: grid; grid-template-columns: 90px 1fr 56px; align-items: center; gap: 10px; font-size: .88rem; }
.bar .track { background: var(--line); border-radius: 6px; height: 14px; overflow: hidden; }
.bar .fill { height: 100%; border-radius: 6px; background: var(--mut); }
.bar.good .fill { background: var(--ok); }
.pick { border: 1px solid var(--line); border-left: 5px solid var(--acc); border-radius: 12px; padding: 10px 14px; margin-bottom: 10px; }
.pick p { margin: 4px 0; font-size: .92rem; }
.pick .match { background: var(--hl); border-radius: 8px; padding: 6px 8px; }
.pick .label { color: var(--mut); font-size: .78rem; }
.settings { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin: 12px 0; }
.settings label { font-size: .88rem; color: var(--mut); display: grid; gap: 6px; }
.settings output { color: var(--ink); font-weight: 700; }
input[type="range"] { width: 100%; accent-color: var(--acc); }
pre { margin: 6px 0 0; padding: 12px; border-radius: 12px; background: var(--bg); border: 1px solid var(--line); white-space: pre-wrap; word-break: break-word; font: 12.5px/1.5 ui-monospace, Consolas, monospace; max-height: 340px; overflow: auto; }
.foot { padding-bottom: 36px; color: var(--mut); font-size: .9rem; }
.foot a, .note a { color: inherit; }
@media (max-width: 520px) { .card { padding: 16px; } .bar { grid-template-columns: 70px 1fr 48px; } }