:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #15181e;
  --muted: #646b78;
  --line: #e3e6eb;
  --brand: #1f5eff;
  --brand-ink: #ffffff;
  --good: #12805c;
  --good-bg: #e3f5ee;
  --warn: #9a5b00;
  --warn-bg: #fdf1dc;
  --bad: #b42318;
  --bad-bg: #fde8e6;
  --code: #f0f2f5;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.wrap.wide { max-width: 1200px; }
.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; gap: 12px; }
.brand { font-weight: 700; font-size: 18px; color: var(--ink); }
.logo { color: var(--brand); }
.nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.nav a { color: var(--ink); }
.nav-admin { color: var(--brand) !important; font-weight: 600; }
main { padding-top: 28px; padding-bottom: 40px; min-height: 70vh; }
.foot { color: var(--muted); font-size: 13px; padding-bottom: 32px; }
h1 { font-size: 26px; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 28px 0 10px; }
h3 { font-size: 16px; margin: 18px 0 8px; }
.sub { color: var(--muted); margin: 0 0 20px; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.stat { font-size: 26px; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 13px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; }
.kv th { width: 45%; }
.table-wrap { overflow-x: auto; }
form.inline { display: inline; }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; font-weight: 400; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--ink); font: inherit;
}
textarea { min-height: 90px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
.btn, button {
  display: inline-block; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--brand);
  background: var(--brand); color: var(--brand-ink); font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover, button:hover { filter: brightness(1.05); text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 14px; }
.btn-ghost, button.btn-ghost { background: transparent; color: var(--brand); }
.btn-danger, button.btn-danger { background: var(--bad); border-color: var(--bad); color: #fff; }
button.link { background: none; border: none; color: var(--ink); padding: 0; font-weight: 400; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 14px; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.pill.good { background: var(--good-bg); color: var(--good); }
.pill.warn { background: var(--warn-bg); color: var(--warn); }
.pill.bad { background: var(--bad-bg); color: var(--bad); }
.pill.muted { background: var(--code); color: var(--muted); }
.flash { padding: 12px 14px; border-radius: 8px; margin-bottom: 18px; }
.flash.ok { background: var(--good-bg); color: var(--good); }
.flash.err { background: var(--bad-bg); color: var(--bad); }
.banner { padding: 14px 16px; border-radius: var(--radius); margin-bottom: 18px; background: var(--warn-bg); color: var(--warn); }
.banner.bad { background: var(--bad-bg); color: var(--bad); }
code, pre { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; background: var(--code); border-radius: 6px; }
code { padding: 1px 6px; }
pre { padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
pre.logs { max-height: 560px; overflow-y: auto; font-size: 12px; }
.meter { height: 8px; background: var(--code); border-radius: 99px; overflow: hidden; margin-top: 6px; }
.meter-bar { height: 100%; }
.meter-bar.good { background: var(--good); }
.meter-bar.warn { background: var(--warn); }
.meter-bar.bad { background: var(--bad); }
.meter-label { font-size: 13px; color: var(--muted); margin-top: 4px; }
.steps { counter-reset: step; }
.step { position: relative; padding-left: 44px; }
.step::before {
  counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 20px;
  width: 26px; height: 26px; border-radius: 50%; background: var(--code); color: var(--muted);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; margin-left: -6px;
}
.step.done::before { content: "✓"; background: var(--good-bg); color: var(--good); }
.step h2 { margin-top: 0; }
.auth { max-width: 420px; margin: 20px auto; }
.hero { text-align: center; padding: 40px 0 20px; }
.hero h1 { font-size: 36px; }
.hero p { font-size: 17px; color: var(--muted); max-width: 620px; margin: 10px auto 24px; }
.features { margin-top: 30px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .row { grid-template-columns: 1fr; } .hero h1 { font-size: 28px; } }
.copy-wrap { position: relative; }
.copy-btn { position: absolute; top: 6px; right: 6px; padding: 3px 9px; font-size: 12px; }

html { scroll-behavior: smooth; }
.banner.info { background: #e8efff; color: #1d3f9e; }
.banner.info a { color: #1d3f9e; text-decoration: underline; }
.danger-zone { border-color: #f3c2bd; }
.danger-link { color: var(--bad); }
.btn-ghost-danger, a.btn-ghost-danger { color: var(--bad); border-color: var(--bad); }
.toc ol { margin: 8px 0 0; padding-left: 22px; columns: 2; column-gap: 32px; }
.toc li { margin: 3px 0; }
@media (max-width: 640px) { .toc ol { columns: 1; } }
.guide ol, .guide ul { padding-left: 22px; }
.guide li { margin: 6px 0; }
.guide h3 { margin-top: 22px; }
.guide .kv { margin: 8px 0; max-width: 520px; }
.path .arrow { color: var(--muted); }
section[id] { scroll-margin-top: 16px; }
.card > h2:first-child { margin-top: 0; }
.toc li { break-inside: avoid; }