.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  position: relative;
  z-index: 0;
}

.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-decor);
  pointer-events: none;
  background:
    radial-gradient(1200px 720px at 50% 45%, rgba(184, 169, 255, 0.06), transparent 60%),
    url("../icons/logo-hero.png") center / min(1320px, 112vmin) no-repeat;
  opacity: 0.06;
  filter: saturate(1.0) contrast(1.0);
  mix-blend-mode: screen;
  transform: translate3d(0, 0, 0) rotate(-0.3deg);
  animation: watermark-float 26s ease-in-out infinite alternate;
}

@media (max-width: 520px) {
  .app-shell::before {
    opacity: 0.05;
    background-size: auto, min(800px, 120vmin);
  }
}

@keyframes watermark-float {
  0% { transform: translate3d(-0.5%, 0.2%, 0) rotate(-0.4deg); }
  100% { transform: translate3d(0.5%, -0.2%, 0) rotate(0.3deg); }
}

@media (prefers-reduced-motion: reduce) {
  .app-shell::before {
    animation: none !important;
    transform: none !important;
  }
}

html[data-reduced-motion="true"] .app-shell::before {
  animation: none !important;
  transform: none !important;
}

.container {
  width: min(1200px, calc(100% - 2 * var(--space-5)));
  margin-inline: auto;
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: var(--glass-2);
  background: linear-gradient(180deg, rgba(7, 7, 20, 0.80), rgba(7, 7, 20, 0.40));
  border-bottom: 1px solid var(--c-border);
  transition: border-color var(--t-med) ease, background var(--t-med) ease;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity var(--t-fast) ease;
}
.brand:hover {
  opacity: 0.85;
}
.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  box-shadow:
    0 20px 50px rgba(124, 92, 255, 0.18),
    0 0 0 4px rgba(184, 169, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
  transform: translateZ(0);
}
.brand-title {
  font-family: var(--font-serif);
  letter-spacing: 0.3px;
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--c-text), var(--c-accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand-badge {
  font-size: 0.7rem;
  color: var(--c-text-muted);
  border: 1px solid var(--c-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.02);
  letter-spacing: 0.2px;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(7, 7, 20, 0.40);
  backdrop-filter: var(--glass-1);
}

.main {
  padding: var(--space-6) 0 var(--space-7);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 860px) {
  .grid-2 {
    grid-template-columns: 1.25fr 0.75fr;
  }
}

.footer {
  border-top: 1px solid var(--c-border);
  padding: var(--space-4) 0;
  color: var(--c-text-muted);
  font-size: 0.85rem;
}

.bottom-nav {
  position: sticky;
  bottom: 0;
  z-index: var(--z-bottom-nav);
  border-top: 1px solid var(--c-border);
  background: rgba(7, 7, 20, 0.82);
  backdrop-filter: var(--glass-2);
}
.bottom-nav-inner {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  padding: var(--space-1) 0;
}
.bottom-nav .btn {
  justify-content: center;
  padding: 10px 2px;
  font-size: 0.75rem;
  white-space: normal;
  line-height: 1.2;
  min-height: 44px;
  border-radius: var(--radius-sm);
  text-align: center;
}
@media (min-width: 860px) {
  .bottom-nav {
    display: none;
  }
}

@media (max-width: 520px) {
  .brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }
  .brand-title {
    font-size: 0.9rem;
  }
  .brand-badge {
    display: none;
  }
  .brand {
    gap: 6px;
  }
  .nav {
    gap: 2px;
    padding: 2px;
  }
  .nav .btn {
    padding: 6px 8px;
    font-size: 0.75rem;
  }
  .topbar-inner {
    gap: var(--space-2);
    padding: var(--space-1) 0;
  }
  .nav .btn.ghost[href="#/feed"],
  .nav .btn.ghost[href="#/explorar"] {
    display: none;
  }
}

@media (min-width: 521px) and (max-width: 859px) {
  .nav .btn {
    padding: 8px 12px;
    font-size: 0.82rem;
  }
  .topbar-inner {
    gap: var(--space-3);
  }
  .nav .btn.ghost[href="#/explorar"] {
    display: none;
  }
}