:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --text: #1f2933;
    --muted: #6b7280;
    --line: #d9dee3;
    --primary: #1f5fbf;
    --primary-dark: #174a95;
    --danger: #b42318;
    --ok: #1b7f3b;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--text);
    background: var(--bg);
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: #17212b;
    color: #fff;
}

.brand { color: #fff; text-decoration: none; font-weight: 700; letter-spacing: 0.08em; }
.brand span { font-weight: 400; opacity: 0.8; margin-left: 0.25rem; }
.nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav a, .session a { color: #cbd5e1; text-decoration: none; }
.nav a:hover, .session a:hover { color: #fff; }
.session { margin-left: auto; display: flex; gap: 1rem; align-items: center; }
.session__user { color: #fff; font-weight: 600; }

.page { max-width: 1100px; margin: 1.5rem auto; padding: 0 1rem; }

h1 { font-size: 1.5rem; margin: 0 0 1rem; display: flex; align-items: center; gap: 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 0.75rem; display: flex; align-items: center; gap: 1rem; }
h1 small { font-size: 0.9rem; font-weight: 400; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.25rem; }
.card--narrow { max-width: 480px; margin-left: auto; margin-right: auto; }
.columns { display: grid; grid-template-columns: 1fr 1.4fr; gap: 1.25rem; }
@media (max-width: 800px) { .columns { grid-template-columns: 1fr; } }

label { display: block; font-weight: 600; margin: 0.75rem 0 0.25rem; }
label.check { display: flex; align-items: center; gap: 0.5rem; font-weight: 400; }
input[type=text], input[type=password], input[type=email], input[type=search], input[type=number], input:not([type]), select {
    width: 100%; padding: 0.5rem 0.6rem; border: 1px solid var(--line); border-radius: var(--radius); font: inherit; background: #fff;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.button {
    display: inline-block; padding: 0.5rem 0.9rem; border: 1px solid var(--line); border-radius: var(--radius);
    background: #fff; color: var(--text); font: inherit; cursor: pointer; text-decoration: none; margin-top: 0.75rem;
}
.button--primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.button--primary:hover { background: var(--primary-dark); }
.button--danger { color: var(--danger); border-color: var(--danger); }
.button--small { padding: 0.3rem 0.6rem; font-size: 0.85rem; margin-top: 0; }
.link { background: none; border: none; padding: 0; color: var(--primary); cursor: pointer; font: inherit; text-decoration: underline; }
.link--danger { color: var(--danger); }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.45rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
td.actions { white-space: nowrap; }
td.actions form, .actions form { display: inline; margin-left: 0.5rem; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin: 0.75rem 0; }
.actions--stack { flex-direction: column; align-items: flex-start; }
.actions--stack form { margin: 0; }

dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1rem; margin: 0 0 1rem; }
dt { color: var(--muted); }
dd { margin: 0; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; background: #eef1f4; padding: 0.1rem 0.3rem; border-radius: 3px; }
code.block { display: block; margin-bottom: 0.2rem; }
code.details { white-space: pre-wrap; word-break: break-all; }
code.secret { font-size: 1.05rem; letter-spacing: 0.08em; }

.validation-summary ul { margin: 0 0 0.75rem; padding-left: 1.2rem; color: var(--danger); }
.validation-summary.validation-summary-valid { display: none; }
.field-validation-error { color: var(--danger); font-size: 0.85rem; }

.flash { padding: 0.6rem 0.9rem; border-radius: var(--radius); margin-bottom: 1rem; }
.flash--ok { background: #e6f4ea; color: var(--ok); }
.flash--error { background: #fdecea; color: var(--danger); }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; text-decoration: none; color: inherit; display: flex; flex-direction: column; }
.tile__value { font-size: 1.8rem; font-weight: 700; }
.tile__label { color: var(--muted); }

.filters { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.filters input, .filters select { width: auto; flex: 1; }
.filters .button { margin-top: 0; }

.pager { display: flex; gap: 1rem; align-items: center; margin-top: 1rem; }
.muted { color: var(--muted); }

.enrol { display: flex; gap: 1.5rem; align-items: flex-start; flex-wrap: wrap; margin: 1rem 0; }
.enrol__qr { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.codes { columns: 2; list-style: none; padding: 0; }
.codes li { margin-bottom: 0.4rem; }