:root {
  --bg: #f7f7f9;
  --fg: #1f2330;
  --muted: #6b7280;
  --primary: #3a6df0;
  --danger: #d64545;
  --border: #e5e7eb;
  --card: #fff;
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; margin: 0; background: var(--bg); color: var(--fg); }
body.centered { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
header {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 1.5rem; background: var(--card); border-bottom: 1px solid var(--border);
}
header .brand { font-weight: 700; color: var(--fg); text-decoration: none; }
header nav { display: flex; gap: 1rem; }
header nav a { color: var(--muted); text-decoration: none; }
header nav a:hover { color: var(--fg); }
header form.inline { margin-left: auto; display: flex; align-items: center; gap: .5rem; }
button.link { background: none; border: none; color: var(--primary); cursor: pointer; padding: 0; }
main { max-width: 980px; margin: 1.5rem auto; padding: 0 1.5rem; }
h1 { margin-top: 0; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 1rem; margin: 1rem 0 2rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1.25rem; }
.card h2 { margin: 0; font-size: 2rem; }
.card p { margin: .25rem 0; color: var(--muted); }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--border); vertical-align: middle; font-size: .9rem; }
tr:last-child td { border-bottom: none; }
td.actions form { display: inline; margin-right: .25rem; }
td.nested { background: #fafafa; }
button, .button { font: inherit; padding: .4rem .8rem; border-radius: 6px; border: 1px solid var(--border); background: var(--primary); color: #fff; cursor: pointer; text-decoration: none; display: inline-block; }
button.secondary, .button.secondary { background: var(--card); color: var(--fg); }
button.danger, .button.danger { background: var(--danger); border-color: var(--danger); }
button:hover { opacity: .92; }
.muted { color: var(--muted); font-size: .9em; }
.flash { padding: .75rem 1rem; border-radius: 6px; background: #def4e0; color: #1f5128; margin-bottom: 1rem; }
.flash.error { background: #fde2e2; color: #6b1f1f; }
form.stack { display: flex; flex-direction: column; gap: .75rem; max-width: 640px; }
form.stack label { display: flex; flex-direction: column; gap: .25rem; font-weight: 500; }
form.stack label.checkbox { flex-direction: row; align-items: center; gap: .5rem; font-weight: normal; }
form.stack input[type=text], form.stack input[type=number], form.stack select, form.stack textarea {
  font: inherit; padding: .4rem .5rem; border: 1px solid var(--border); border-radius: 6px;
}
fieldset { border: 1px solid var(--border); border-radius: 6px; padding: 1rem; }
legend { padding: 0 .5rem; font-weight: 600; color: var(--muted); text-transform: uppercase; font-size: .75rem; letter-spacing: .05em; }
ul.calendars { list-style: none; padding: 0; margin: 0; }
ul.calendars li { padding: .25rem 0; display: flex; align-items: center; gap: .5rem; }
.dot { width: .75rem; height: .75rem; border-radius: 50%; background: #ccc; display: inline-block; }
dl.settings { display: grid; grid-template-columns: 200px 1fr; gap: .5rem 1rem; max-width: 640px; }
dl.settings dt { color: var(--muted); }
code { background: #eef0f5; padding: .1rem .35rem; border-radius: 4px; font-size: .85em; }
pre code { display: block; padding: .5rem .75rem; overflow-x: auto; white-space: pre-wrap; }
.chat { display: flex; flex-direction: column; gap: .75rem; margin: 1rem 0 1.5rem; }
.turn { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: .75rem 1rem; max-width: 80%; }
.turn-role { font-size: .7rem; text-transform: uppercase; color: var(--muted); margin-bottom: .25rem; letter-spacing: .05em; }
.turn-body { white-space: pre-wrap; }
.turn-user { align-self: flex-end; background: #e8efff; border-color: #c8d6ff; }
.turn-assistant { align-self: flex-start; }
.action-card { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--primary); border-radius: 8px; padding: .75rem 1rem; margin: .5rem 0; }
.action-card details { margin: .5rem 0; }
.action-card summary { cursor: pointer; color: var(--muted); font-size: .85em; }