:root {
  --ink: #1a1c1f;
  --muted: #6b7280;
  --line: #e3e6ea;
  --bg: #f7f8fa;
  --card: #ffffff;
  --accent: #1f5eff;
  --ok: #16803c;
  --error: #b42318;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 16px 0 8px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .02em; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.brand { font-weight: 650; color: var(--ink); }
.who { display: flex; align-items: center; gap: 8px; margin-left: auto; font-size: 14px; flex-wrap: wrap; }
.who .login { color: var(--muted); }
.logout { margin: 0; }

.wrap { max-width: 880px; margin: 0 auto; padding: 16px; }
.page-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 8px 0 16px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.crumbs span { margin: 0 4px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.card.auth { max-width: 380px; margin: 48px auto; }
.card.auth h1 { margin-bottom: 4px; }

.stack { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.row.upload { margin-top: 8px; }
.grow { flex: 1 1 240px; }
.num { flex: 0 0 120px; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], input:not([type]) {
  font: inherit;
  color: var(--ink);
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  width: 100%;
}
input[type="file"] { font: inherit; font-size: 14px; }

select {
  font: inherit;
  color: var(--ink);
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  width: 100%;
}

button, .button {
  font: inherit;
  padding: 9px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.primary[disabled] { background: #c7d2fe; border-color: #c7d2fe; cursor: not-allowed; }
button.link { border: none; background: none; color: var(--accent); padding: 0; font-size: 13px; }
button.link:hover { text-decoration: underline; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.empty { color: var(--muted); padding: 24px; text-align: center; }

.flash { padding: 10px 12px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: #ecfdf3; color: var(--ok); border: 1px solid #abefc6; }
.flash.error { background: #fef3f2; color: var(--error); border: 1px solid #fecdca; }

.chip {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3538cd;
  white-space: nowrap;
}
.chip.role { background: #f1f5f9; color: #475569; }
.num-badge { font-size: 12px; color: var(--muted); }

.list { list-style: none; margin: 0; padding: 0; }
.list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 8px;
  color: var(--ink);
  flex-wrap: wrap;
}
.list-item:hover { border-color: #c7d2fe; text-decoration: none; }
.list-item .title { font-weight: 600; flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.list-item time { color: var(--muted); font-size: 13px; }

.role-block { border-top: 1px solid var(--line); padding-top: 4px; }
.role-block:first-of-type { border-top: none; }
.files { list-style: none; margin: 0 0 8px; padding: 0; }
.files li { display: flex; align-items: center; gap: 10px; padding: 6px 0; flex-wrap: wrap; font-size: 14px; }
.files .file-name { overflow-wrap: anywhere; }
.files .size { font-size: 13px; white-space: nowrap; }
.files .hash { font-family: ui-monospace, monospace; font-size: 12px; }
.inline.confirm { margin: 0 0 0 auto; }

.journal { list-style: none; margin: 0; padding: 0; font-size: 13px; }
.journal li { display: flex; gap: 10px; padding: 4px 0; border-bottom: 1px dashed var(--line); flex-wrap: wrap; }
.journal time { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.journal .action { font-family: ui-monospace, monospace; }

.chat { list-style: none; margin: 0 0 12px; padding: 0; }
.chat li { padding: 10px 12px; border-radius: 10px; margin-bottom: 8px; background: #f7f8fa; }
.chat li.assistant { background: #eef2ff; }
.chat .who { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.chat .text { display: block; white-space: pre-wrap; }
.chat time { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }

@media (max-width: 640px) {
  .who .company { display: none; }
  .wrap { padding: 12px; }
  .card { padding: 14px; }
  .top { padding: 10px 12px; }
  .who { width: 100%; margin-left: 0; }
  .num { flex: 1 1 100%; }
  .row > button { flex: 1 1 100%; }
  .inline.confirm { margin-left: 0; }
  h1 { font-size: 20px; }
}