:root {
  --navy: #1F3A5F;
  --navy-deep: #152a45;
  --amber: #D97706;
  --cream: #FBFAF5;
  --ink: #1a2332;
  --muted: #5c6b7a;
  --line: #d9dee5;
  --ok: #0f7a4a;
  --err: #b42318;
  --card: #ffffff;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.5;
}
h1, h2, h3, .brand-mark { font-family: "Libre Baskerville", Georgia, serif; font-weight: 700; }
h1 { margin: 0 0 0.35rem; color: var(--navy); font-size: 1.8rem; }
h2 { margin: 0 0 0.75rem; color: var(--navy); font-size: 1.25rem; }
a { color: var(--navy); }
img { max-width: 100%; }
button, input, select, textarea { font: inherit; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid transparent;
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { color: #fff; filter: brightness(1.08); }
.btn-amber { background: var(--amber); }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--navy); }
.btn-ghost:hover { color: var(--amber); border-color: var(--amber); }
.btn-danger { background: var(--err); }
.btn-sm { padding: 0.32rem 0.65rem; font-size: 0.9rem; }

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse at top right, rgba(217,119,6,0.14), transparent 42%),
    linear-gradient(160deg, #eef2f6, var(--cream));
}
.auth-card {
  width: min(460px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.75rem;
}
.auth-card.wide { width: min(640px, 100%); }
.brand-mark { margin: 0 0 0.5rem; }
.brand-mark img { height: 42px; width: auto; }
.lede, .hint, .muted { color: var(--muted); }
.copyright { margin: 1.5rem 0 0; font-size: 0.85rem; }

label { display: block; margin: 0.85rem 0 0.3rem; font-weight: 600; }
input, select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}
textarea { min-height: 7rem; resize: vertical; }
.row { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.check { display: flex; gap: 0.5rem; align-items: center; font-weight: 500; margin: 1rem 0; }
.check input { width: auto; }

.flash { padding: 0.7rem 0.85rem; margin: 0 0 1rem; border: 1px solid var(--line); background: #fff; }
.flash-ok { border-color: #b7e4c7; background: #f3fbf6; }
.flash-err { border-color: #f5c2c0; background: #fff6f5; color: var(--err); }

.app-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: var(--navy-deep); color: #fff; padding: 1.25rem 0.9rem; }
.sidebar-brand { padding: 0 0.45rem 1rem; }
.sidebar-brand img { height: 36px; width: auto; }
.sidebar-brand strong, .sidebar-brand span { display: block; }
.sidebar-brand span { color: #c9d4e3; font-size: 0.88rem; }
.sidebar nav { display: grid; gap: 0.2rem; }
.sidebar a {
  color: #e8eef6;
  text-decoration: none;
  padding: 0.45rem 0.65rem;
  border-left: 3px solid transparent;
}
.sidebar a:hover, .sidebar a.is-active { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar a.is-active { border-left-color: var(--amber); }

.content { min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.topbar div { margin-right: auto; }
.account-switch { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.35rem; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
.rbac-scroll { overflow-x: auto; }
.rbac-matrix th, .rbac-matrix td { text-align: center; }
.rbac-perm-col, .rbac-group-row td { text-align: left; }
.rbac-group-row td { background: #eef2f6; font-weight: 700; }
.public-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--navy-deep);
}
.public-brand { display: flex; align-items: center; gap: 0.6rem; color: #fff; text-decoration: none; }
.public-brand img { height: 36px; width: auto; }
.public-brand strong { color: #fff; }
.pay-gateway-fields { margin-top: 1rem; }
.pay-gateway-fields[hidden] { display: none; }
.nav-toggle { display: none; }
.page { padding: 1.25rem; }
.app-footer { color: var(--muted); font-size: 0.85rem; padding-top: 1.5rem; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin: 1rem 0; }
.stat, .card, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem;
}
.stat strong { display: block; font-size: 1.6rem; color: var(--navy); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.75rem; }
.card h2 { font-size: 1.15rem; }
.stack { display: grid; gap: 0.75rem; }
.panel + .panel, .stack + .panel { margin-top: 0.75rem; }
.split { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 0.75rem; align-items: start; }

.badge {
  display: inline-block;
  padding: 0.05rem 0.45rem;
  border: 1px solid var(--line);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--navy);
  background: #fff;
}
.badge-published { background: #eef8f2; border-color: #b7e4c7; color: var(--ok); }
.badge-draft { background: #fff8ee; border-color: #f3d7a1; color: #8a5a00; }

.progress {
  height: 8px;
  background: #e6ebf1;
  margin-top: 0.35rem;
}
.progress span { display: block; height: 100%; background: var(--amber); }

table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { text-align: left; padding: 0.55rem 0.65rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }

.lesson-body { white-space: pre-wrap; }
fieldset { border: 0; margin: 0 0 1rem; padding: 0; }
legend { font-weight: 700; padding: 0; }
.choices { display: grid; gap: 0.4rem; margin: 0.5rem 0 1rem; }
.choices label { margin: 0; font-weight: 500; display: flex; gap: 0.5rem; align-items: flex-start; }
.choices input { width: auto; margin-top: 0.25rem; }
.correct { color: var(--ok); font-weight: 700; }
.wrong { color: var(--err); }

@media (max-width: 960px) {
  .stats, .split, .grid-2 { grid-template-columns: 1fr; }
  .app-shell { display: block; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(280px, 86vw);
    z-index: 20;
    transform: translateX(-105%);
    transition: transform 0.18s ease;
  }
  body.nav-open .sidebar { transform: none; }
  .nav-toggle { display: inline-flex; }
}