/* ==========================================================================
   App shell — sidebar / rail / topbar / mobile bottom nav / demo (design system §3, §9)
   ========================================================================== */
.rv-app--shell { display: flex; min-height: 100dvh; }
.rv-skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--rv-neutral-900); color: #fff; padding: 8px 12px; border-radius: var(--rv-radius-control); }
.rv-skip:focus { left: 8px; }

/* ---------- sidebar ---------- */
.rv-sidebar {
  width: var(--rv-sidebar-width); flex: 0 0 var(--rv-sidebar-width);
  height: 100dvh; position: sticky; top: 0; z-index: var(--rv-z-navigation);
  display: flex; flex-direction: column; overflow: hidden;
  background-color: var(--rv-surface);
  background-image: radial-gradient(ellipse at right center, var(--rv-sidebar-tint-cyan), transparent 70%),
                    radial-gradient(ellipse at left bottom, var(--rv-sidebar-tint-pink), transparent 65%);
  border-right: 1px solid var(--rv-divider);
  transition: width var(--rv-motion-base) var(--rv-motion-easing), flex-basis var(--rv-motion-base) var(--rv-motion-easing);
}
.rv-sidebar__brand { display: flex; align-items: center; gap: 8px; padding: 14px 10px 12px 14px; border-bottom: 1px solid var(--rv-divider); min-height: 64px; }
.rv-sidebar__logo { display: inline-flex; flex: 0 0 auto; }
.rv-sidebar__logo img { width: 70px; height: auto; object-fit: contain; }
.rv-sidebar__app { font-size: 11px; line-height: 14px; color: var(--rv-text-muted); flex: 1; min-width: 0; }
.rv-sidebar .rv-sidebar__close { display: none; }
.rv-sidebar__nav { flex: 1; min-height: 0; overflow-y: auto; padding: 8px 8px 16px; scrollbar-width: thin; }
.rv-navgroup + .rv-navgroup { margin-top: 6px; }
.rv-navgroup__head {
  display: flex; align-items: center; gap: 6px; width: 100%; min-height: 32px; padding: 6px 8px;
  background: none; border: 0; border-radius: var(--rv-radius-menu);
  font-size: 11px; line-height: 16px; font-weight: 600; letter-spacing: .02em; color: var(--rv-text-muted); text-transform: none; text-align: left;
}
.rv-navgroup__head > span:first-child { flex: 1; }
.rv-navgroup__head:hover { color: var(--rv-primary-700); }
.rv-navgroup__chev { transition: transform var(--rv-motion-fast); }
.rv-navgroup__head[aria-expanded="false"] .rv-navgroup__chev { transform: rotate(-90deg); }
.rv-navlist { list-style: none; margin: 0; padding: 0; }
.rv-navitem {
  position: relative; display: flex; align-items: center; gap: 8px; min-height: 36px; padding: 6px 10px;
  border-radius: var(--rv-radius-menu); color: var(--rv-text-secondary); font-size: 13px; line-height: 18px; text-decoration: none;
}
.rv-navitem .rv-icon { flex: 0 0 18px; }
.rv-navitem__label { flex: 1; min-width: 0; }
a.rv-navitem:hover { background: rgba(229, 231, 235, .7); color: var(--rv-primary-700); text-decoration: none; }
.rv-navitem.is-active { background: var(--rv-primary-50); color: var(--rv-neutral-900); font-weight: 600; }
.rv-navitem.is-active::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 3px; border-radius: 3px; background: var(--rv-primary-500); }
.rv-navitem.is-active .rv-icon { color: var(--rv-primary-700); }
.rv-navitem.is-disabled { color: var(--rv-neutral-400); cursor: not-allowed; }
.rv-navitem.is-disabled .rv-pill-phase { flex: 0 0 auto; }
.rv-navgroup.is-phase2 .rv-navgroup__head { color: var(--rv-neutral-400); }
.rv-pill-phase, .rv-pill-demo {
  display: inline-flex; align-items: center; height: 18px; padding: 0 6px; border-radius: var(--rv-radius-pill);
  font-size: 10px; line-height: 18px; font-weight: 600; white-space: nowrap;
}
.rv-pill-phase { background: var(--rv-neutral-100); color: var(--rv-neutral-500); border: 1px solid var(--rv-neutral-200); }
.rv-pill-demo { background: var(--rv-warning-bg); color: var(--rv-warning); border: 1px solid var(--rv-warning-border); }
.rv-sidebar__footer { display: flex; align-items: center; gap: 10px; padding: 12px; border-top: 1px solid var(--rv-divider); background: rgba(255, 255, 255, .7); }
.rv-sidebar__who { flex: 1; min-width: 0; }
.rv-sidebar__name { font-size: 13px; line-height: 18px; font-weight: 500; }
.rv-sidebar__role { font-size: 11px; line-height: 16px; color: var(--rv-text-muted); }
.rv-iconbtn {
  display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; flex: 0 0 36px;
  border: 0; background: transparent; color: var(--rv-text-secondary); border-radius: var(--rv-radius-menu);
}
.rv-iconbtn:hover { background: var(--rv-neutral-100); color: var(--rv-primary-700); }

/* collapsed rail (desktop toggle) */
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar { width: var(--rv-sidebar-collapsed); flex-basis: var(--rv-sidebar-collapsed); }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__app,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__logo,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navitem__label,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navitem .rv-pill-phase,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navgroup__head > span,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navgroup__chev,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__who,
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__footer .rv-iconbtn { display: none; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__brand { padding: 12px 6px; justify-content: center; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__nav { padding: 8px 4px; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navitem { justify-content: center; padding: 8px 0; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navgroup__head { justify-content: center; min-height: 12px; padding: 4px 0; border-top: 1px solid var(--rv-divider); border-radius: 0; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navgroup:first-child .rv-navgroup__head { border-top: 0; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-navlist[hidden] { display: block !important; }
:is(.rv-app--shell.is-collapsed, .rv-collapsed .rv-app--shell) .rv-sidebar__footer { justify-content: center; padding: 10px 4px; }

/* ---------- main + topbar ---------- */
.rv-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }
.rv-topbar {
  position: sticky; top: 0; z-index: calc(var(--rv-z-navigation) - 1);
  display: flex; align-items: center; gap: 8px; min-height: var(--rv-header-height); padding: 8px var(--rv-content-padding-x);
  background: rgba(255, 255, 255, .96); border-bottom: 1px solid var(--rv-divider);
}
.rv-topbar__menu, .rv-topbar__logo { display: none; }
.rv-topbar__logo img { width: 64px; height: auto; }
.rv-search { position: relative; flex: 0 1 440px; min-width: 0; }
.rv-search__icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--rv-text-muted); pointer-events: none; }
.rv-demo-badge {
  display: inline-flex; align-items: center; gap: 6px; height: 32px; padding: 0 10px; border-radius: var(--rv-radius-pill);
  border: 1px solid var(--rv-warning-border); background: var(--rv-warning-bg); color: var(--rv-warning); font-size: 12px; font-weight: 500; white-space: nowrap;
}
.rv-demo-badge:hover { background: #FFEFC4; }
.rv-demo-badge__clock { color: var(--rv-neutral-700); font-weight: 400; }
.rv-userbtn { display: inline-flex; border: 0; background: none; padding: 2px; border-radius: 50%; }
.rv-userbtn:hover { box-shadow: 0 0 0 3px var(--rv-primary-100); }
.rv-content { flex: 1; min-width: 0; padding: var(--rv-content-padding-y) var(--rv-content-padding-x) 32px; outline: none; }

/* ---------- mobile bottom nav ---------- */
.rv-mobile-nav { display: none; }
.rv-demo-fab {
  position: fixed; left: 12px; bottom: 12px; z-index: var(--rv-z-navigation); display: inline-flex; align-items: center; gap: 6px;
  height: 32px; padding: 0 12px; border-radius: var(--rv-radius-pill); border: 1px solid var(--rv-neutral-700);
  background: var(--rv-neutral-800); color: #fff; font-size: 11px; font-weight: 600; letter-spacing: .03em; box-shadow: var(--rv-shadow-popover);
}
.rv-demo-fab:hover { background: var(--rv-neutral-900); }

/* ---------- auth / public bare layouts ---------- */
.rv-app--auth, .rv-app--public { min-height: 100dvh; background: var(--rv-surface-subtle); }
.rv-bare { outline: none; }

/* ---------- demo drawer ---------- */
.rv-demo-accs { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.rv-demo-acc { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); }
.rv-demo-acc.is-current { border-color: var(--rv-primary-300); background: var(--rv-primary-50); }
.rv-demo-clock { display: flex; align-items: center; gap: 6px; font-size: 14px; }
.rv-verify { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; font-size: 12px; line-height: 18px; }
.rv-verify li { display: flex; gap: 6px; align-items: flex-start; }
.rv-verify .is-ok .rv-icon { color: var(--rv-success); }
.rv-verify .is-bad .rv-icon { color: var(--rv-danger); }
.rv-verify-h { margin: 12px 0 6px; font-size: 13px; line-height: 20px; font-weight: 600; }
.rv-demo-co__courses { max-height: 232px; overflow: auto; padding: 8px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); }
.rv-demo-co__cc { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 8px; align-items: center; font-size: 13px; }
.rv-demo-co__table { min-width: 560px; }
.rv-demo-co__table .is-n { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.rv-demo-co__stack { padding: 10px 12px; border: 1px solid var(--rv-warning-border); background: var(--rv-warning-bg); border-radius: var(--rv-radius-card); }
@media (max-width: 767px) { .rv-demo-co__cc { grid-template-columns: minmax(0, 1fr); gap: 4px; } }
.rv-more-nav .rv-navitem { min-height: 44px; font-size: 14px; }
.rv-more-nav .rv-navgroup__head { min-height: 40px; font-size: 12px; }

/* ---------- responsive (design system §9) ---------- */
@media (min-width: 1024px) and (max-width: 1199px) {
  .rv-search { flex-basis: 320px; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .rv-sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: var(--rv-sidebar-collapsed); flex-basis: auto; }
  .rv-app--shell { padding-left: var(--rv-sidebar-collapsed); }
  .rv-sidebar .rv-sidebar__app, .rv-sidebar .rv-sidebar__logo, .rv-sidebar .rv-navitem__label, .rv-sidebar .rv-navitem .rv-pill-phase,
  .rv-sidebar .rv-navgroup__head > span, .rv-sidebar .rv-navgroup__chev, .rv-sidebar .rv-sidebar__who, .rv-sidebar .rv-sidebar__collapse, .rv-sidebar__footer .rv-iconbtn { display: none; }
  .rv-sidebar .rv-navitem { justify-content: center; padding: 8px 0; }
  .rv-sidebar .rv-navlist[hidden] { display: block !important; }
  .rv-sidebar .rv-navgroup__head { min-height: 12px; padding: 4px 0; border-top: 1px solid var(--rv-divider); border-radius: 0; justify-content: center; }
  .rv-sidebar__nav { padding: 8px 4px; }
  .rv-sidebar__footer { justify-content: center; padding: 10px 4px; }
  .rv-topbar__menu { display: inline-flex; }
  /* expanded as a drawer */
  body.rv-nav-open .rv-sidebar { width: 280px; box-shadow: var(--rv-shadow-modal); z-index: calc(var(--rv-z-backdrop) + 1); }
  body.rv-nav-open .rv-sidebar .rv-sidebar__app, body.rv-nav-open .rv-sidebar .rv-sidebar__logo, body.rv-nav-open .rv-sidebar .rv-navitem__label,
  body.rv-nav-open .rv-sidebar .rv-navitem .rv-pill-phase, body.rv-nav-open .rv-sidebar .rv-navgroup__head > span, body.rv-nav-open .rv-sidebar .rv-navgroup__chev,
  body.rv-nav-open .rv-sidebar .rv-sidebar__who, body.rv-nav-open .rv-sidebar__footer .rv-iconbtn, body.rv-nav-open .rv-sidebar .rv-sidebar__close { display: inline-flex; }
  body.rv-nav-open .rv-sidebar .rv-sidebar__who { display: block; }
  body.rv-nav-open .rv-sidebar .rv-navitem { justify-content: flex-start; padding: 6px 10px; }
  body.rv-nav-open .rv-sidebar .rv-navgroup__head { justify-content: flex-start; padding: 6px 8px; min-height: 32px; border-top: 0; }
  body.rv-nav-open .rv-sidebar .rv-navlist[hidden] { display: none !important; }
  body.rv-nav-open .rv-sidebar__nav { padding: 8px; }
  body.rv-nav-open .rv-sidebar__footer { justify-content: flex-start; padding: 12px; }
  body.rv-nav-open .rv-nav-backdrop { display: block; }
  .rv-demo-badge__clock { display: none; }
}
@media (max-width: 767px) {
  .rv-sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: min(86vw, 320px); transform: translateX(-105%); transition: transform var(--rv-motion-base) var(--rv-motion-easing); z-index: calc(var(--rv-z-backdrop) + 1); }
  body.rv-nav-open .rv-sidebar { transform: none; box-shadow: var(--rv-shadow-modal); }
  body.rv-nav-open .rv-nav-backdrop { display: block; }
  .rv-sidebar .rv-sidebar__collapse { display: none; }
  .rv-sidebar .rv-sidebar__close { display: inline-flex; margin-left: auto; }
  .rv-navitem { min-height: 44px; font-size: 14px; }
  .rv-topbar { padding: 6px 8px 6px 12px; gap: 4px; min-height: 52px; }
  .rv-topbar__menu { display: none; }
  .rv-topbar__logo { display: inline-flex; }
  .rv-iconbtn { width: 44px; height: 44px; flex-basis: 44px; }
  .rv-demo-badge { height: 32px; padding: 0 8px; }
  .rv-demo-badge__clock { display: none; }
  .rv-content { padding: var(--rv-content-padding-mobile); padding-bottom: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom) + 24px); }
  .rv-mobile-nav {
    display: flex; position: fixed; inset: auto 0 0; z-index: var(--rv-z-navigation);
    min-height: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom);
    background: var(--rv-surface); border-top: 1px solid var(--rv-divider); box-shadow: 0 -2px 10px rgba(17, 24, 39, .05);
  }
  .rv-mobile-nav__item {
    flex: 1 1 0; min-width: 0; min-height: 56px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
    border: 0; background: none; color: var(--rv-text-secondary); font-size: 11px; line-height: 14px; text-decoration: none; padding: 4px 2px;
  }
  .rv-mobile-nav__item:hover { text-decoration: none; }
  .rv-mobile-nav__item.is-active { color: var(--rv-primary-800); font-weight: 600; }
  .rv-mobile-nav__item.is-active .rv-icon { color: var(--rv-primary-700); }
  .rv-demo-fab { bottom: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom) + 10px); left: auto; right: 10px; height: 30px; padding: 0 10px; font-size: 10px; }
  .rv-demo-fab span { display: none; }
  /* forms with a sticky action bar (Save/Cancel) — keep the Demo button clear of the primary action */
  body:has(.rv-view .rv-form-actions) .rv-demo-fab { bottom: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom) + 112px); }
}
@media print {
  .rv-sidebar, .rv-topbar, .rv-mobile-nav, .rv-demo-fab { display: none !important; }
  .rv-app--shell { display: block; padding: 0; }
  .rv-content { padding: 0; }
}