:root {
  --accent: #2563eb;
  --bg: #f5f6f8; --card: #ffffff; --text: #111827; --muted: #6b7280; --line: #e5e7eb; --input: #ffffff;
  --ok: #059669; --bad: #dc2626;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1116; --card: #171b22; --text: #f3f4f6; --muted: #9ca3af; --line: #272d38; --input: #0e1116; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }
.wrap { width: 100%; max-width: 520px; margin: 0 auto; padding: 16px; flex: 1; }
.head { display: flex; align-items: center; gap: 12px; padding: 8px 0 16px; }
.logo { width: 48px; height: 48px; border-radius: 12px; background: var(--accent); color: #fff; font-weight: 700; display: grid; place-items: center; overflow: hidden; flex: none; }
.logo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.head h1 { font-size: 1.15rem; margin: 0; line-height: 1.2; }
.head p { margin: 0; color: var(--muted); font-size: .85rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; margin-bottom: 16px; }
.card h2 { font-size: 1rem; margin: 0 0 12px; }
label { display: block; font-size: .85rem; color: var(--muted); margin: 12px 0 4px; }
input, select { width: 100%; padding: 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--input); color: var(--text); font: inherit; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: end; }
.result { text-align: center; padding: 20px 12px; border-radius: 14px; background: color-mix(in srgb, var(--accent) 12%, transparent); margin-top: 16px; }
.result .big { font-size: 2.4rem; font-weight: 800; color: var(--accent); line-height: 1.1; }
.result .sub { color: var(--muted); font-size: .9rem; margin-top: 4px; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; font-size: .9rem; }
.stats div { background: var(--bg); border-radius: 10px; padding: 8px 10px; }
.stats b { display: block; font-size: 1rem; }
.btn { display: block; width: 100%; text-align: center; text-decoration: none; padding: 13px; border-radius: 12px; border: 0; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; margin-top: 10px; }
.btn.alt { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
.btn:disabled { opacity: .5; cursor: default; }
.note { font-size: .8rem; color: var(--muted); margin-top: 12px; }
.err { color: var(--bad); font-size: .9rem; margin-top: 8px; }
.okmsg { color: var(--ok); font-size: .9rem; margin-top: 8px; }
.hidden { display: none !important; }
.footer { text-align: center; padding: 20px 16px 28px; font-size: .8rem; letter-spacing: .08em; }
.footer a { color: var(--muted); text-decoration: none; font-weight: 600; }
.footer a:hover { color: var(--accent); }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .8rem; word-break: break-all; background: var(--bg); padding: 8px; border-radius: 8px; }
.logo-pick { display: flex; align-items: center; gap: 12px; }
.logo-pick .logo { width: 64px; height: 64px; font-size: 1.2rem; }
.logo-pick input { padding: 8px; }
.welcome { border-color: var(--accent); }
.tight { margin-top: 0; }
.colorpick { height: 48px; padding: 4px; }
.grow { flex: 1; }
.btn.small { margin: 6px 0 0; padding: 8px; font-size: .85rem; }
.mt { margin-top: 16px; }
.tabs { display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 14px; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: none; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit; font-size: .9rem; cursor: pointer; }
.tab[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.langsel { width: auto; padding: 8px; font-size: .85rem; }
.center { text-align: center; }
.stats span { display: block; color: var(--muted); font-size: .8rem; }
.tbl th { color: var(--muted); font-weight: 600; font-size: .8rem; }
.chart { width: 100%; height: auto; display: block; background: var(--bg); border-radius: 10px; }
.chart .line { fill: none; stroke: var(--accent); stroke-width: 2; }
.chart .area { fill: color-mix(in srgb, var(--accent) 15%, transparent); }
.chart .base { stroke: var(--line); stroke-width: 1; }
.sess { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.sess:last-child { border-bottom: 0; }
.sess .meta { color: var(--muted); font-size: .8rem; }
.pill { font-size: .75rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--bg); color: var(--muted); white-space: nowrap; }
.pill.on { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.bar { height: 10px; border-radius: 999px; background: var(--bg); overflow: hidden; margin-top: 12px; }
.bar > div { height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.trade { display: flex; justify-content: space-between; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .9rem; }
.trade .meta { color: var(--muted); font-size: .8rem; }
.trade .pos { color: var(--ok); font-weight: 700; }
.trade .neg { color: var(--bad); font-weight: 700; }
.trade button { background: none; border: 0; color: var(--muted); cursor: pointer; font: inherit; font-size: .8rem; }
.result.bad { background: color-mix(in srgb, var(--bad) 12%, transparent); }
.result.bad .big { color: var(--bad); }
.result .big.med { font-size: 1.4rem; }
.hint { font-size: .85rem; color: var(--muted); margin: 8px 0 0; }
.badge { display: inline-block; font-size: .7rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; vertical-align: middle; margin-right: 6px; }
.badge.req { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.badge.opt { background: var(--bg); color: var(--muted); }
.steps { margin: 0; padding-left: 20px; font-size: .9rem; }
.steps li { margin: 6px 0; }