:root {
  --ink: #1F2A44; --muted: #5A6270; --line: #D8DEE5; --bg: #F7F8FA; --card: #FFFFFF;
  --accent: #3D6DA8; --accent-soft: #EAF1FB;
  --user: #EEF5EE; --user-line: #4E8A4E; --editor: #E6F3F2; --editor-line: #2F8A84;
  --approver: #FDF4E3; --approver-line: #C9962E; --setup: #F3EDF7; --setup-line: #8E6BAA;
  --tool: #EAF1FB; --tool-line: #3D6DA8;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Calibri, Arial, sans-serif;
  color: var(--ink); background: var(--bg); }
a { color: var(--accent); }
h1 { font-size: 1.8rem; margin: .2em 0 .3em; }
h2 { font-size: 1.25rem; margin: 1.8em 0 .5em; }
h3 { font-size: 1.02rem; margin: 0 0 .4em; }
.lead { font-size: 1.08rem; max-width: 46em; }
.muted { color: var(--muted); font-size: .92rem; }
.error { background: #FDECEC; border: 1px solid #E5A3A3; padding: .6em .9em; border-radius: 8px; }
.ok { background: var(--user); border: 1px solid var(--user-line); padding: .6em .9em; border-radius: 8px; }

/* header */
.top { background: var(--ink); color: #fff; display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1.4rem;
  padding: .7rem 1.2rem; position: sticky; top: 0; z-index: 5; }
.brand a { color: #fff; font-weight: 700; text-decoration: none; font-size: 1.05rem; }
.brand span { color: #AEB8C8; font-size: .85rem; margin-left: .7em; }
.top nav { display: flex; flex-wrap: wrap; gap: .2rem; flex: 1; }
.top nav a { color: #DCE3EE; text-decoration: none; padding: .35em .7em; border-radius: 6px; font-size: .95rem; }
.top nav a:hover { background: rgba(255,255,255,.08); }
.top nav a.on { background: #fff; color: var(--ink); font-weight: 600; }
.who { display: flex; align-items: center; gap: .8em; font-size: .9rem; }
.who a { color: #DCE3EE; }
.who form { margin: 0; }
button.link { background: none; border: 0; color: #AEB8C8; cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

main { max-width: 980px; margin: 0 auto; padding: 1.6rem 16px 4rem; }
main.narrow { max-width: 440px; }
main.wide { max-width: 1400px; }
main.doc { max-width: 1100px; }

/* controls */
.button, button { display: inline-block; font: inherit; font-size: .95rem; padding: .5em 1em; border-radius: 8px;
  border: 1px solid var(--line); background: #fff; color: var(--ink); text-decoration: none; cursor: pointer; }
.button.primary, button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.button.small, button.small { font-size: .85rem; padding: .3em .7em; }
button:disabled { opacity: .55; cursor: default; }
input, select, textarea { font: inherit; width: 100%; padding: .55em .7em; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink); }
label { display: block; font-weight: 600; font-size: .95rem; }
label input, label select, label textarea { margin-top: .3em; font-weight: 400; }
.stack { display: grid; gap: 1rem; }
.row { display: flex; flex-wrap: wrap; gap: .8rem; align-items: end; }
.row label { flex: 1 1 180px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1.1rem 1.3rem; margin: 1rem 0; }
fieldset.kinds { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
fieldset.kinds legend { font-weight: 600; font-size: .95rem; margin-bottom: .4rem; padding: 0; }
.pill { display: inline-flex; align-items: center; gap: .35em; font-weight: 400; border: 1px solid var(--line);
  border-radius: 999px; padding: .3em .85em; background: #fff; cursor: pointer; }
.pill input { width: auto; margin: 0; }
.tag { display: inline-block; font-size: .78rem; background: var(--accent-soft); color: var(--accent); border-radius: 999px;
  padding: .05em .6em; font-weight: 600; }

/* summary */
.ask-us { border-left: 5px solid var(--accent); }
.ask-us ol { padding-left: 1.2em; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: .9rem; }
.grid3 .card { margin: 0; }
.role { border-left-width: 5px; }
.role.user { border-left-color: var(--user-line); }
.role.editor { border-left-color: var(--editor-line); }
.role.approver { border-left-color: var(--approver-line); }
.role.setup { border-left-color: var(--setup-line); }
.role.tool { border-left-color: var(--tool-line); }
.role p { margin: 0; font-size: .95rem; }
table.numbers { border-collapse: collapse; width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
table.numbers th, table.numbers td { text-align: left; vertical-align: top; padding: .7em .9em; border-top: 1px solid var(--line); }
table.numbers tr:first-child th, table.numbers tr:first-child td { border-top: 0; }
table.numbers th { width: 45%; font-weight: 600; }
ul.tight li { margin: .25em 0; }

/* workflows */
.tabs { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0; }
.tabs a { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: .3em .8em; text-decoration: none; font-size: .9rem; }
.workflow { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 1rem; margin: 1.2rem 0; scroll-margin-top: 80px; }
.wf-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.wf-head h2 { margin: 0; }
.workflow img { width: 100%; height: auto; display: block; margin-top: .8rem; }

/* PRD */
.doc-bar { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-bottom: 1rem; }
.doc-bar span { flex: 1; color: var(--muted); }
article.prd { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 1.2rem 1.6rem; overflow-x: auto; }
article.prd section { scroll-margin-top: 80px; }
article.prd table { border-collapse: collapse; width: 100%; font-size: .9rem; margin: .8em 0; }
article.prd th, article.prd td { border: 1px solid var(--line); padding: .45em .6em; vertical-align: top; text-align: left; }
article.prd th { background: var(--bg); }
article.prd code { font-size: .88em; background: var(--bg); padding: .05em .3em; border-radius: 4px; }
article.prd header, article.prd .title { display: none; }

/* ask */
.chat { display: grid; gap: .7rem; margin: 1rem 0; }
.msg { padding: .75em 1em; border-radius: 12px; white-space: pre-wrap; max-width: 52em; }
.msg.user { background: var(--accent); color: #fff; justify-self: end; }
.msg.assistant { background: #fff; border: 1px solid var(--line); }
.msg.pending { color: var(--muted); font-style: italic; }
.msg.error { background: #FDECEC; border: 1px solid #E5A3A3; }
form.ask { display: flex; gap: .6rem; align-items: end; position: sticky; bottom: 0; background: var(--bg); padding: .6rem 0; }
form.ask textarea { flex: 1; }
details.earlier { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: .6em .9em; margin: .5em 0; }
details.earlier summary { cursor: pointer; }
.answer { white-space: pre-wrap; margin-top: .6em; }

/* feedback + admin */
ul.sent { list-style: none; padding: 0; }
ul.sent li, .fb { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: .7em .9em; margin: .5em 0; }
ul.sent p, .fb p { margin: .4em 0 0; white-space: pre-wrap; }
table.list { border-collapse: collapse; width: 100%; background: #fff; font-size: .92rem; }
table.list th, table.list td { border-bottom: 1px solid var(--line); padding: .5em .6em; text-align: left; vertical-align: middle; }
table.list tr.off td { color: var(--muted); }
.actions { white-space: nowrap; }
form.inline { display: inline-flex; gap: .3rem; margin: 0 .3rem 0 0; }
form.inline input { width: 9em; padding: .3em .5em; font-size: .85rem; }

@media (max-width: 640px) {
  h1 { font-size: 1.5rem; }
  .top { position: static; }
  table.numbers th { width: 50%; }
  form.ask { flex-direction: column; align-items: stretch; }
  .actions { white-space: normal; }
}
.card > h2:first-child, .card > h3:first-child { margin-top: 0; }

/* short version */
.rgroup { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: .9rem 1.2rem; margin: 1rem 0; scroll-margin-top: 80px; }
.rg-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .3rem 1rem; }
.rg-head h2 { margin: 0; font-size: 1.15rem; }
.gno { color: var(--accent); margin-right: .25em; }
.rgroup ul { margin: .6em 0 .4em; padding-left: 1.2em; }
.rgroup li { margin: .3em 0; }
.rg-links { margin: .3em 0 0; font-size: .92rem; }

/* requirements */
.filters { display: flex; flex-wrap: wrap; gap: .8rem; align-items: end; }
.filters label { flex: 1 1 200px; }
table.reqs { border-collapse: collapse; width: 100%; background: #fff; font-size: .92rem; border: 1px solid var(--line); }
table.reqs th, table.reqs td { border-bottom: 1px solid var(--line); padding: .55em .7em; text-align: left; vertical-align: top; }
table.reqs th { background: var(--bg); font-size: .85rem; }
table.reqs th:nth-child(2), table.reqs td:nth-child(2) { width: 42%; }
.rid { font-weight: 700; white-space: nowrap; }
.pri { font-size: .8rem; font-weight: 600; border-radius: 999px; padding: .05em .55em; }
.pri.must { background: var(--accent-soft); color: var(--accent); }
.pri.should { background: var(--approver); color: #8A6414; }
.pri.later { background: #EEF0F3; color: var(--muted); }
.status { font-size: .82rem; font-weight: 600; }
.status.accepted { color: var(--user-line); } .status.declined { color: #A33; } .status.proposed { color: var(--accent); }
.why { color: var(--muted); font-size: .88rem; margin-top: .3em; }
tr.prop td form { margin-top: .4em; }
form.decide { display: flex; flex-wrap: wrap; gap: .3rem; }
form.decide input { width: 10em; padding: .3em .5em; font-size: .85rem; }
.rgroup-table h2 { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
details.propose summary { cursor: pointer; }
details.propose form { margin-top: 1rem; }
.msg.note { background: var(--user); border: 1px solid var(--user-line); font-size: .92rem; }
@media (max-width: 640px) {
  .filters { position: static; }
  table.reqs, table.reqs tbody, table.reqs tr, table.reqs td { display: block; width: 100% !important; }
  table.reqs tr:first-child { display: none; }
  table.reqs tr { border-bottom: 1px solid var(--line); padding: .4em 0; }
  table.reqs td { border: 0; padding: .2em .7em; }
}