:root {
  color-scheme: light;
  --bg: #f6f7f9; --panel: #ffffff; --text: #1b1f27; --muted: #5a6372; --border: #d8dce3;
  --accent: #2456d6; --accent-text: #ffffff; --code-bg: #0f1624; --code-text: #e6edf7;
  --err: #b3261e; --warn: #8a5a00; --info: #36506b; --ok: #1d6f42; --focus: #ffb000;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0e1218; --panel: #161c25; --text: #e6e9ef; --muted: #9aa4b5; --border: #2a3342;
    --accent: #7aa2ff; --accent-text: #0b1020; --code-bg: #0a0f18; --code-text: #dbe6f7;
    --err: #ff8a80; --warn: #f2c35b; --info: #9db8d6; --ok: #6fd39a;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1218; --panel: #161c25; --text: #e6e9ef; --muted: #9aa4b5; --border: #2a3342;
  --accent: #7aa2ff; --accent-text: #0b1020; --code-bg: #0a0f18; --code-text: #dbe6f7;
  --err: #ff8a80; --warn: #f2c35b; --info: #9db8d6; --ok: #6fd39a;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", sans-serif;
}
h1 { font-size: 1.5rem; margin: 0; }
h2 { font-size: 1.15rem; margin: 0 0 .75rem; }
h3 { font-size: 1rem; margin: 1rem 0 .5rem; }
.sub { margin: .25rem 0 0; color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-text); padding: .5rem 1rem; z-index: 10; }
.skip:focus { left: 0; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.top { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; padding: 1rem clamp(1rem, 3vw, 2rem); }
.top-actions { display: flex; gap: .5rem; align-items: center; }
.layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 1rem; padding: 0 clamp(1rem, 3vw, 2rem) 1rem; align-items: start; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
.out-panel { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; }

.toolbar { display: flex; flex-wrap: wrap; gap: .5rem; align-items: end; margin-bottom: .75rem; }
.grow { flex: 1 1 12rem; }
label { display: block; font-weight: 600; font-size: .9rem; }
label.inline, label.check { display: inline-flex; gap: .4rem; align-items: center; font-weight: 500; }
input[type="text"], input[type="url"], input[type="email"], select, textarea {
  width: 100%; margin-top: .25rem; padding: .5rem .6rem; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
textarea { resize: vertical; font-family: inherit; }
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--err); }
.btn {
  display: inline-block; padding: .5rem .9rem; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.small { padding: .25rem .6rem; font-size: .85rem; }
.btn.danger { color: var(--err); }
.link { color: var(--accent); }
fieldset { border: 1px solid var(--border); border-radius: 8px; margin: 0 0 .75rem; padding: .6rem .75rem; min-width: 0; }
legend { font-weight: 700; padding: 0 .35rem; font-size: .9rem; }
.seg { display: flex; gap: .75rem; align-items: center; }
.seg label { font-weight: 500; display: inline-flex; gap: .3rem; align-items: center; }

.form { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem 1rem; }
.field { min-width: 0; }
.field.wide, .rows, .days, .form > .note { grid-column: 1 / -1; }
.req { color: var(--err); margin-inline-start: .15rem; }
.rec { margin-inline-start: .4rem; font-size: .7rem; font-weight: 600; color: var(--info); border: 1px solid var(--border); border-radius: 999px; padding: 0 .4rem; }
.help, .note { color: var(--muted); font-size: .85rem; margin: .25rem 0 0; }
.note { border-inline-start: 3px solid var(--info); padding: .35rem .6rem; background: var(--bg); border-radius: 4px; }
.err { color: var(--err); font-size: .85rem; margin-top: .2rem; }
.lint { font-size: .85rem; margin-top: .2rem; color: var(--warn); }
.lint .e { color: var(--err); }
.row { border: 1px dashed var(--border); border-radius: 8px; padding: .6rem; margin-bottom: .6rem; display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; list-style: none; }
.row-head { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
.rows ul { margin: 0; padding: 0; }
.rows .field, .row .days { grid-column: auto; }
.row .field.wide, .row .days { grid-column: 1 / -1; }
.days { display: flex; flex-wrap: wrap; gap: .4rem .9rem; }
.days label { font-weight: 500; display: inline-flex; gap: .3rem; align-items: center; }

.graph-bar { border: 1px solid var(--border); border-radius: 8px; padding: .75rem; margin-bottom: .75rem; }
.entities { list-style: none; margin: 0 0 .5rem; padding: 0; display: grid; gap: .35rem; }
.entities li { display: flex; gap: .35rem; align-items: center; }
.entities .pick { flex: 1; text-align: start; }
.entities .pick[aria-current="true"] { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.add-entity { display: flex; gap: .5rem; }
.add-entity select { margin-top: 0; }
.type-bar { display: flex; gap: 1rem; align-items: end; margin-bottom: .5rem; flex-wrap: wrap; }
.type-bar label { flex: 1 1 14rem; }

.code {
  margin: 0; padding: 1rem; background: var(--code-bg); color: var(--code-text); border-radius: 8px;
  overflow: auto; max-height: 55vh; font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre;
}
.status { min-height: 1.5em; margin: .5rem 0; font-weight: 600; }
.status.ok { color: var(--ok); }
.status.bad { color: var(--err); }
.links { display: flex; gap: .5rem; flex-wrap: wrap; }
.checks ul { margin: 0 0 .5rem; padding: 0; list-style: none; }
.checks li { padding: .2rem 0; font-size: .92rem; }
.sev { display: inline-block; min-width: 4.8em; font-size: .75rem; font-weight: 700; text-transform: uppercase; margin-inline-end: .4rem; }
.sev-error { color: var(--err); } .sev-warning { color: var(--warn); } .sev-info { color: var(--info); }
.checks h4 { margin: .6rem 0 .2rem; font-size: .9rem; }

dialog { width: min(42rem, 94vw); border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); color: var(--text); padding: 1rem; }
dialog::backdrop { background: rgba(0, 0, 0, .5); }
dialog textarea { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: .5rem; margin-top: .5rem; }
.foot { text-align: center; color: var(--muted); padding: 1rem; font-size: .9rem; }
.foot a { color: var(--accent); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .out-panel { position: static; max-height: none; }
}
@media (max-width: 560px) {
  .form, .row { grid-template-columns: 1fr; }
  .top { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }