/* Shell layout */
.app-root {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  background: var(--paper);
}
.app-main {
  min-width: 0;
  overflow-x: hidden;
}

/* Nav rail */
.nav-rail {
  position: sticky; top: 0; height: 100vh;
  background: #1a1815;
  color: #E3DDD1;
  padding: 22px 18px;
  display: flex; flex-direction: column;
  border-right: 1px solid rgba(255,255,255,.06);
  overflow-y: auto;
}
.nav-rail.collapsed { padding: 22px 10px; }
.app-root:has(.nav-rail.collapsed) { grid-template-columns: 60px 1fr; }

.nav-rail .sello { color: var(--paper); }
.nav-rail .sello::before { background: var(--red); box-shadow: 0 0 0 3px rgba(230,57,70,.25); }
.nav-top { display:flex; justify-content: space-between; align-items:center; margin-bottom: 26px; }
.nav-toggle {
  padding: 6px; border-radius: 8px; color: #A9A196;
  transition: background .15s;
}
.nav-toggle:hover { background: rgba(255,255,255,.08); color: white; }

.nav-hint {
  padding: 12px 14px; background: rgba(255,255,255,.04);
  border-radius: 12px; margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,.06);
}
.nav-hint .eyebrow { color: #C7BFB0; }
.nav-hint p { font-size: 12px; color: #A9A196; margin-top: 8px; line-height: 1.5; }

.nav-groups { flex: 1; display: flex; flex-direction: column; gap: 20px; }
.nav-group-title {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: #7A7267; text-transform: uppercase; padding: 0 10px 8px;
}
.nav-item {
  width: 100%; text-align: left;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 10px;
  color: #C7BFB0; font-size: 13px;
  transition: background .15s, color .15s;
  position: relative;
}
.nav-item:hover { background: rgba(255,255,255,.05); color: white; }
.nav-item.active { background: rgba(230,57,70,.12); color: white; }
.nav-num { font-family: var(--mono); font-size: 10px; color: #7A7267; width: 20px; }
.nav-item.active .nav-num { color: var(--red); }
.nav-dot {
  position: absolute; right: 12px; width: 6px; height: 6px; border-radius: 50%;
  background: var(--red);
}
.nav-foot { padding-top: 20px; border-top: 1px solid rgba(255,255,255,.06); margin-top: 20px; }

/* Screens container */
.screen { min-height: 100vh; }
.screen-pad { padding: 40px 48px; }
@media (max-width: 720px) { .screen-pad { padding: 24px; } }