/* ==========================================================================
   Layout: shell, sidebar, topbar, bottom nav, grids
   Breakpoints:
     base      < 768   mobile — bottom nav + FAB
     md       >= 768   tablet — rail lateral
     lg       >= 1180  desktop — sidebar completa, multi-columna
     xl       >= 1600  desktop amplio
   ========================================================================== */

.app {
  min-height: 100dvh;
}

/* ---------------- Sidebar ---------------- */
.sidebar {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-2);
  height: 44px;
  color: var(--text-primary);
}
.brand-mark {
  width: 28px;
  height: 28px;
  flex: none;
}
.brand-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.brand-name b {
  color: var(--accent);
  font-weight: 600;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-section {
  margin-top: var(--space-5);
  padding: 0 var(--space-3) var(--space-2);
}
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.nav-link svg {
  width: 18px;
  height: 18px;
  flex: none;
}
.nav-link:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.nav-link[aria-current='page'] {
  color: var(--text-primary);
  background: var(--surface-elevated);
}
.nav-link[aria-current='page']::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 calc(10px * var(--glow-strength)) var(--accent);
}
.nav-link .kbd {
  margin-left: auto;
}
.nav-badge {
  margin-left: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 10px;
  display: grid;
  place-items: center;
}

.sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.user-chip {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}
.avatar {
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-contrast);
  background: linear-gradient(135deg, var(--accent), color-mix(in oklab, var(--accent) 40%, var(--accent-2)));
}

/* ---------------- Main + topbar ---------------- */
.main {
  min-width: 0;
  padding-bottom: calc(var(--bottomnav-h) + var(--safe-bottom) + var(--space-6));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: calc(var(--topbar-h) + var(--safe-top));
  padding: var(--safe-top) var(--space-4) 0;
  background: color-mix(in oklab, var(--background) 78%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur);
}
.topbar[data-scrolled] {
  border-bottom-color: var(--border);
}
.topbar-title {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}
.topbar-title h1 {
  font-size: var(--text-md);
  font-weight: 500;
}
.topbar-title .label {
  line-height: 1.2;
}
.topbar-brand {
  display: flex;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.topbar-actions .btn-quick {
  display: none;
}

.page {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4) var(--space-6);
}
.page:focus {
  box-shadow: none;
}
.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-2) 0 var(--space-5);
}
.page-header h2 {
  font-size: var(--text-xl);
  font-weight: 400;
  letter-spacing: -0.035em;
}
.page-transition {
  animation: fade-up calc(var(--dur) * 1.4) var(--ease-out) both;
}

/* ---------------- Bottom nav (mobile) ---------------- */
.bottomnav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  height: calc(var(--bottomnav-h) + var(--safe-bottom));
  padding: 0 var(--space-2) var(--safe-bottom);
  background: color-mix(in oklab, var(--background) 86%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  border-top: 1px solid var(--border);
}
.bottomnav a,
.bottomnav button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 48px;
  color: var(--text-tertiary);
  font-size: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--dur-fast);
}
.bottomnav svg {
  width: 22px;
  height: 22px;
}
.bottomnav [aria-current='page'] {
  color: var(--text-primary);
}
.bottomnav [aria-current='page'] svg {
  color: var(--accent);
  filter: drop-shadow(0 0 calc(6px * var(--glow-strength)) color-mix(in oklab, var(--accent) 60%, transparent));
}

.fab {
  position: fixed;
  right: var(--space-4);
  bottom: calc(var(--bottomnav-h) + var(--safe-bottom) + var(--space-4));
  z-index: 41;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-contrast);
  box-shadow: 0 10px 30px -8px color-mix(in oklab, var(--accent) calc(55% * var(--glow-strength)), transparent), 0 2px 0 rgba(255, 255, 255, 0.25) inset;
  transition: transform var(--dur-fast) var(--ease-out);
}
.fab svg {
  width: 26px;
  height: 26px;
}
.fab:active {
  transform: scale(0.94);
}

/* ---------------- Grids ---------------- */
.grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: minmax(0, 1fr);
}
.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: minmax(0, 1fr);
}
.grid-kpi {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.span-full {
  grid-column: 1 / -1;
}

/* ================= md: tablet ================= */
@media (min-width: 768px) {
  .app {
    display: grid;
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
  }
  .sidebar {
    position: sticky;
    top: 0;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: calc(var(--safe-top) + var(--space-4)) var(--space-3) var(--space-4);
    border-right: 1px solid var(--border);
    background: color-mix(in oklab, var(--background) 70%, transparent);
    overflow-y: auto;
  }
  .sidebar .brand {
    justify-content: center;
    padding: 0;
  }
  .sidebar .brand-name,
  .sidebar .nav-link span,
  .sidebar .nav-section,
  .sidebar .nav-link .kbd,
  .sidebar .nav-badge,
  .sidebar .user-chip .grow {
    display: none;
  }
  .sidebar .nav {
    margin-top: var(--space-5);
    gap: var(--space-1);
  }
  .sidebar .nav-link {
    justify-content: center;
    padding: 0;
    min-height: 44px;
  }
  .sidebar .nav-link[aria-current='page']::before {
    left: -12px;
  }
  .sidebar .user-chip {
    justify-content: center;
    padding: var(--space-1);
    border: 0;
    background: none;
  }
  .topbar {
    padding: var(--safe-top) var(--space-6) 0;
  }
  .topbar-brand {
    display: none;
  }
  .topbar-actions .btn-quick {
    display: inline-flex;
  }
  .page {
    padding: var(--space-4) var(--space-6) var(--space-8);
  }
  .main {
    padding-bottom: 0;
  }
  .bottomnav,
  .fab {
    display: none;
  }
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid-4,
  .grid-kpi {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .grid,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-kpi {
    gap: var(--space-4);
  }
}

/* ================= lg: desktop ================= */
@media (min-width: 1180px) {
  .app {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  }
  .sidebar {
    padding: var(--space-5) var(--space-5) var(--space-4);
  }
  .sidebar .brand {
    justify-content: flex-start;
    padding: 0 var(--space-2);
  }
  .sidebar .brand-name,
  .sidebar .nav-link span,
  .sidebar .nav-section,
  .sidebar .nav-badge {
    display: revert;
  }
  .sidebar .nav-link .kbd {
    display: inline-flex;
  }
  .sidebar .user-chip .grow {
    display: block;
  }
  .sidebar .nav-link {
    justify-content: flex-start;
    padding: 0 var(--space-3);
    min-height: 38px;
  }
  .sidebar .nav {
    margin-top: 0;
    gap: 2px;
  }
  .sidebar .user-chip {
    justify-content: flex-start;
    padding: var(--space-2);
    border: 1px solid var(--border);
    background: var(--surface);
  }
  .topbar {
    padding: 0 var(--space-7);
  }
  .page {
    padding: var(--space-5) var(--space-7) var(--space-8);
  }
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1600px) {
  :root {
    --sidebar-w: 268px;
  }
}