/* ─── SHELL ──────────────────────────────────────────────────────────────── */
#app {
  display: flex;
  min-height: 100vh;
}

/* ─── TOPBAR ─────────────────────────────────────────────────────────────── */
#topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: rgba(255, 251, 245, 0.85);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  z-index: 100;
}

#topbar-logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  flex-shrink: 0;
}

#topbar-logo span {
  color: var(--accent);
}

#topbar-center {
  flex: 1;
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

#topbar-user {
  font-size: 0.875rem;
  color: var(--muted);
}

#topbar-role {
  font-size: 0.75rem;
  background: var(--line);
  color: var(--text);
  padding: 2px 8px;
  border-radius: 99px;
  font-weight: 500;
}

#btn-logout {
  font-size: 0.8rem;
  color: var(--muted);
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 12px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
#btn-logout:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ─── SIDEBAR NAV ────────────────────────────────────────────────────────── */
#nav {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: var(--nav-w);
  height: calc(100vh - var(--topbar-h));
  background: rgba(255, 251, 245, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 20px 0;
  z-index: 90;
}

#nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  user-select: none;
}

.nav-item:hover {
  background: rgba(184,95,61,0.08);
  color: var(--accent);
}

.nav-item.active {
  background: rgba(184,95,61,0.12);
  color: var(--accent);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.nav-section {
  padding: 16px 26px 6px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 600;
}

/* ─── MAIN CONTENT ───────────────────────────────────────────────────────── */
#main {
  margin-left: var(--nav-w);
  margin-top: var(--topbar-h);
  flex: 1;
  min-height: calc(100vh - var(--topbar-h));
  padding: 32px 36px 48px;
}

/* ─── PAGE HEADER ────────────────────────────────────────────────────────── */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-sub {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 4px;
}

/* ─── GRID LAYOUTS ───────────────────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

/* ─── STATS ROW ──────────────────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 1200px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  #nav {
    display: none;
  }
  #main {
    margin-left: 0;
    padding: 16px;
  }
  .stats-row,
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}