/* Show Class colours (branding/README): navy screen, blue student, orange sparkle. */
:root {
  --navy: #1E3A8A;
  --blue: #2563EB;
  --orange: #F59E0B;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --text: #0F172A;
  --muted: #475569;
  --line: #E2E8F0;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1220;
    --surface: #111A2E;
    --text: #E2E8F0;
    --muted: #94A3B8;
    --line: #1E293B;
    --blue: #60A5FA;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--blue); }

.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
}

.badge {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--orange);
  color: #1F2937;
}

main {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 16px;
}

.hero h1 { font-size: 32px; line-height: 1.2; margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.note { font-size: 14px; color: var(--muted); }

.button {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 8px;
  background: var(--navy);
  color: #FFFFFF;
  font-weight: 600;
  text-decoration: none;
}

.button.disabled { opacity: 0.45; cursor: not-allowed; }
button.button { border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.button.secondary { background: transparent; color: var(--text); border: 1px solid var(--line); }

.spacer { flex: 1; }
.nav { font-weight: 600; text-decoration: none; }

.card {
  max-width: 460px;
  margin: 0 auto;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.card.wide { max-width: 760px; }
.card h1 { font-size: 26px; margin: 0 0 8px; }
.card .lead { font-size: 16px; margin-bottom: 20px; }

label { display: block; font-weight: 600; margin-bottom: 6px; }
input[type="email"], input[type="text"] {
  display: block;
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 16px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.code-input { font-size: 24px; letter-spacing: 6px; text-align: center; }

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin: 18px 0 8px; }
.row form { margin: 0; }
button.link { background: none; border: 0; padding: 0; font: inherit; color: var(--blue); text-decoration: underline; cursor: pointer; }

.notice { padding: 10px 14px; border-radius: 8px; margin: 0 0 16px; }
.notice.error { background: #FEE2E2; color: #7F1D1D; }
.notice.info { background: #DBEAFE; color: #1E3A8A; }

/* Customer pages */
.card.wide { margin: 0 auto 20px; }
.card h2 { font-size: 19px; margin: 0 0 12px; }
main .crumbs + h1 { margin: 4px 0 2px; }
.org-list { list-style: none; margin: 0; padding: 0; }
.org-list li + li { border-top: 1px solid var(--line); }
.org-link { display: flex; flex-direction: column; gap: 2px; padding: 12px 4px; color: inherit; text-decoration: none; }
.org-link:hover .org-name { text-decoration: underline; }
.org-name { font-weight: 700; color: var(--blue); }
.org-status { font-size: 15px; }
.tabs { display: flex; flex-wrap: wrap; gap: 4px; margin: 16px 0 20px; border-bottom: 1px solid var(--line); }
.tabs a { padding: 8px 14px; text-decoration: none; font-weight: 600; color: var(--muted); border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--blue); }
.code-heading { margin-top: 22px; }
.licence-code { font-size: 18px; padding: 8px 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; user-select: all; word-break: break-all; display: inline-block; }
.cmd { white-space: pre-wrap; word-break: break-all; font-size: 14px; background: var(--bg); border: 1px solid var(--line); padding: 12px; border-radius: 8px; user-select: all; }
.warn { color: #B45309; }

/* Admin */
main.wide { max-width: 1100px; padding-top: 28px; }
.admin-badge { background: var(--navy); color: #FFFFFF; }
.admin-nav { display: flex; gap: 18px; margin-left: 12px; }
.admin-nav a { font-weight: 600; text-decoration: none; }
.admin .card { margin: 0 0 20px; }
.admin h1 { margin: 6px 0 4px; }
.admin h2 { font-size: 19px; margin: 0 0 12px; }
.crumbs { margin: 0; font-size: 14px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin: 18px 0; }
.stat { display: flex; flex-direction: column; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: inherit; text-decoration: none; }
.stat-n { font-size: 30px; font-weight: 800; }
.table-wrap { overflow-x: auto; margin-bottom: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; }
.nowrap { white-space: nowrap; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 13px; font-weight: 600; vertical-align: middle; }
.tag-live { background: #DCFCE7; color: #14532D; }
.tag-in-grace { background: #FEF3C7; color: #78350F; }
.tag-expired, .tag-revoked { background: #FEE2E2; color: #7F1D1D; }
.tag-replaced { background: #E2E8F0; color: #334155; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.form select, .form textarea, .add-member select, .search input, .add-member input, .inline select {
  padding: 9px 10px; font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
.form select, .form textarea { display: block; width: 100%; margin-bottom: 16px; }
.form input[type="number"] { display: block; width: 100%; padding: 10px 12px; margin-bottom: 16px; font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
.row input[type="text"], .row input[type="email"], .row input[type="date"] { width: auto; flex: 1 1 220px; margin: 0; }
.row input[type="date"] { flex: 0 1 auto; padding: 9px 10px; font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
.hint { font-size: 13px; color: var(--muted); margin: -10px 0 16px; }
.row .hint { margin: 0; }
.inline-label { margin: 0; }
form.inline { display: inline-flex; gap: 8px; align-items: center; margin: 0; }
.button.danger { background: #B91C1C; }
button.link.danger { color: #B91C1C; }
details.card > summary { cursor: pointer; list-style: revert; }
.inline-h { display: inline; }
.form { margin-top: 12px; }

@media (max-width: 720px) {
  .top { flex-wrap: wrap; }
  .admin-nav { order: 5; width: 100%; margin: 6px 0 0; }
}

.mail { border-top: 1px solid var(--line); padding-top: 12px; }
.mail pre { white-space: pre-wrap; font-size: 14px; background: var(--bg); padding: 12px; border-radius: 8px; }

.foot {
  padding: 18px 24px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .top { padding: 12px 16px; }
}