/* =====================================================================
   Platform additions on top of base.css — navbar, login, admin, tables
   ===================================================================== */

/* top navbar */
.navbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 16px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: var(--bg-elev); border-bottom: 1px solid var(--line);
}
.navbar .brand { text-decoration: none; }
.navbar .nav-links { display: flex; gap: 6px; margin-inline-start: 12px; }
.navbar .nav-links a { padding: 8px 14px; border-radius: 8px; color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: .92rem; }
.navbar .nav-links a:hover { background: var(--bg-soft); color: var(--ink); }
.navbar .nav-links a.active { background: var(--accent-soft); color: var(--brand); }
:root[data-theme="dark"] .navbar .nav-links a.active { color: var(--ink); }
.navbar .spacer { flex: 1; }
.navbar .user-chip { display: flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--ink-soft); }
.navbar .user-chip .avatar { width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg,var(--brand),var(--accent)); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.brand-logo { height: 34px; width: auto; display: block; border-radius: 6px; }
.role-pill { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; padding: 3px 9px; border-radius: 999px; background: var(--bg-soft); color: var(--ink-mute); }

.page-wrap { max-width: 1080px; margin: 0 auto; padding: clamp(20px,4vw,40px); }
.layout-2col { display: flex; gap: 0; min-height: calc(100vh - 60px); }
.layout-2col .content { flex: 1; min-width: 0; }

/* login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background: radial-gradient(1000px 500px at 80% -10%, rgba(47,111,176,.14), transparent 60%),
              radial-gradient(800px 500px at 0% 10%, rgba(18,165,148,.12), transparent 55%), var(--bg); }
.login-card { width: 100%; max-width: 420px; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 20px; padding: 34px 32px; box-shadow: var(--shadow-lg); }
.login-card .brand { justify-content: center; margin-bottom: 8px; }
.login-card h1 { font-size: 1.4rem; text-align: center; margin-bottom: 4px; }
.login-card .sub { text-align: center; color: var(--ink-mute); font-size: .9rem; margin-bottom: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; border: 1.5px solid var(--line-strong); border-radius: 10px;
  background: var(--bg); color: var(--ink); font-family: inherit; font-size: .95rem;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--brand-2); }
.field textarea { min-height: 120px; resize: vertical; font-family: ui-monospace, monospace; font-size: .82rem; }
.btn-block { width: 100%; }
.alert { padding: 11px 16px; border-radius: 10px; margin-bottom: 16px; font-size: .9rem; }
.alert.err { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); border: 1px solid color-mix(in srgb,var(--danger) 30%,transparent); }
.alert.ok { background: var(--accent-soft); color: var(--brand); border: 1px solid color-mix(in srgb,var(--accent) 30%,transparent); }

/* training cards grid on dashboard */
.tcards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); gap: 18px; margin-top: 18px; }
.tcard { display: flex; flex-direction: column; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 16px; padding: 22px; box-shadow: var(--shadow); text-decoration: none; color: var(--ink); transition: transform .15s, border-color .15s; }
.tcard:hover { transform: translateY(-4px); border-color: var(--brand-2); }
.tcard .tc-icon { font-size: 1.8rem; }
.tcard h3 { margin: 8px 0 4px; font-size: 1.15rem; }
.tcard p { color: var(--ink-soft); font-size: .9rem; flex: 1; }
.tcard .tc-meta { display: flex; align-items: center; gap: 8px; margin-top: 14px; font-size: .82rem; color: var(--ink-mute); }
.tcard .bar { margin-top: 12px; }

/* schedule badges */
.sched { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.sched.open { background: color-mix(in srgb,var(--ok) 15%,transparent); color: var(--ok); }
.sched.upcoming { background: color-mix(in srgb,var(--warn) 15%,transparent); color: var(--warn); }
.sched.closed { background: color-mix(in srgb,var(--danger) 15%,transparent); color: var(--danger); }
.nav-item.locked { opacity: .55; }
.nav-item .ni-lock { margin-inline-start: auto; font-size: .8rem; }

/* quiz timer */
.quiz-timer { position: sticky; top: 70px; z-index: 20; display: inline-flex; align-items: center; gap: 8px;
  background: var(--brand); color: #fff; padding: 8px 16px; border-radius: 999px; font-weight: 700; font-variant-numeric: tabular-nums; box-shadow: var(--shadow); }
.quiz-timer.warn { background: var(--danger); }
.quiz-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 12px 0 22px; }

/* admin tables */
.admin-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.table { width: 100%; border-collapse: collapse; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.table th, .table td { text-align: start; padding: 12px 16px; border-bottom: 1px solid var(--line); font-size: .9rem; }
.table th { background: var(--bg-soft); font-weight: 700; color: var(--ink-soft); }
.table tr:last-child td { border-bottom: none; }
.table .actions { display: flex; gap: 8px; }
.badge { display: inline-block; font-size: .72rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; background: var(--bg-soft); color: var(--ink-soft); }
.badge.role-super_admin { background: color-mix(in srgb,var(--brand) 18%,transparent); color: var(--brand); }
.badge.role-instructor { background: color-mix(in srgb,var(--gold) 18%,transparent); color: var(--gold); }
.badge.role-trainee { background: var(--accent-soft); color: var(--accent); }
.badge.on { background: color-mix(in srgb,var(--ok) 15%,transparent); color: var(--ok); }
.badge.off { background: color-mix(in srgb,var(--danger) 12%,transparent); color: var(--danger); }

.btn-sm { padding: 6px 12px; font-size: .82rem; border-radius: 8px; }
.btn-danger { background: color-mix(in srgb,var(--danger) 12%,transparent); color: var(--danger); border: 1px solid color-mix(in srgb,var(--danger) 30%,transparent); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.admin-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.admin-tabs a { padding: 10px 16px; text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: .9rem; border-bottom: 2px solid transparent; }
.admin-tabs a.active { color: var(--brand); border-bottom-color: var(--brand); }
.checkbox-list { display: grid; grid-template-columns: repeat(auto-fill,minmax(220px,1fr)); gap: 8px; }
.checkbox-list label { display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; font-size: .88rem; cursor: pointer; }
.q-editor { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin-bottom: 12px; background: var(--bg-elev); }
.muted { color: var(--ink-mute); font-size: .85rem; }
.help { font-size: .8rem; color: var(--ink-mute); margin-top: 4px; }

/* ---------- brand logos (light/dark) ---------- */
.brand-logo { height: var(--logo-h, 30px); width: auto; max-width: 260px; display: block; object-fit: contain; }
.logo-dark { display: none; }
:root[data-theme="dark"] .logo-light { display: none; }
:root[data-theme="dark"] .logo-dark { display: block; }
.login-brand .brand-logo { height: calc(var(--logo-h, 30px) * 1.7); max-width: 300px; }
.logo-preview { display: inline-flex; align-items: center; justify-content: center; padding: 14px 18px; border-radius: 12px; background: #eef1f8; border: 1px solid var(--line); margin-bottom: 8px; max-width: 100%; }
.logo-preview img { height: 48px; width: auto; max-width: 260px; object-fit: contain; display: block; }
.logo-preview.on-dark { background: #0f1830; }
.logo-preview.fav { padding: 12px; }
.logo-preview.fav img { height: 64px; width: 64px; }
.field input[type="color"] { height: 46px; padding: 4px; cursor: pointer; }
.field input[type="file"] { padding: 9px 12px; background: var(--bg); }
.logo-preview + label { margin-bottom: 4px; }

/* ---------- reading progress + back-to-top ---------- */
.read-progress { position: fixed; top: 0; inset-inline-start: 0; height: 3px; width: 0%; z-index: 60;
  background: linear-gradient(90deg, var(--accent), var(--brand-2)); transition: width .1s linear; }
.to-top { position: fixed; inset-inline-end: 22px; bottom: 22px; width: 44px; height: 44px; border-radius: 50%;
  border: none; background: var(--brand); color: #fff; font-size: 1.2rem; box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 40; transform: translateY(8px); }
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ---------- table of contents ---------- */
.toc { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; margin: 8px 0 26px; box-shadow: var(--shadow); }
.toc-head { display: flex; align-items: center; justify-content: space-between; font-weight: 800; font-size: .95rem; margin-bottom: 10px; color: var(--ink); }
.toc-count { font-size: .72rem; font-weight: 700; background: var(--accent-soft); color: var(--brand); padding: 3px 10px; border-radius: 999px; }
:root[data-theme="dark"] .toc-count { color: var(--ink); }
.toc-list { margin: 0; padding: 0; list-style: none; counter-reset: toc; columns: 2; column-gap: 28px; }
@media (max-width: 640px){ .toc-list { columns: 1; } }
.toc-list li { counter-increment: toc; break-inside: avoid; margin: 3px 0; }
.toc-list a { display: flex; gap: 8px; padding: 6px 8px; border-radius: 8px; text-decoration: none; color: var(--ink-soft); font-size: .92rem; }
.toc-list a::before { content: counter(toc); flex: none; width: 20px; height: 20px; border-radius: 6px; background: var(--bg-soft); color: var(--ink-mute); font-size: .72rem; font-weight: 700; display: grid; place-items: center; }
.toc-list a:hover { background: var(--bg-soft); color: var(--ink); }
.toc-list a.active { background: var(--accent-soft); color: var(--brand); font-weight: 700; }
:root[data-theme="dark"] .toc-list a.active { color: var(--ink); }

/* ---------- long-session readability polish ---------- */
.session-body .h2 { scroll-margin-top: 84px; margin-top: 2.4rem; padding-top: 1.3rem; border-top: 1px solid var(--line); }
.session-body > .h2:first-child { border-top: none; padding-top: 0; margin-top: 1rem; }
.session-body .h3 { scroll-margin-top: 84px; }
.session-body p.para { font-size: 1.02rem; line-height: 1.75; }
.content { max-width: 900px; }
.crumb { font-size: .9rem; }

@media (max-width: 720px){ .grid-2{grid-template-columns:1fr} .navbar .nav-links a{padding:8px 10px} }