/* Layout del shell: topnav + sidebar + bottom-nav + drawer.
   3 breakpoints, mismo patrón que el prototipo (docs/PROTOTYPE_INVENTORY.md §1.2). */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--brand-dark);
  color: var(--brand-text);
  font-family: var(--font-body);
}

h1,
h2,
h3,
.font-title {
  font-family: var(--font-title);
}

[hidden] {
  display: none !important;
}

/* ---------- Topnav ---------- */
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--brand-surface);
  border-bottom: 1px solid var(--brand-border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  z-index: 20;
}

.topnav-brand {
  font-family: var(--font-title);
  font-weight: 800;
  color: var(--brand-primary-text);
  letter-spacing: 0.02em;
}

/* «QAS - » delante del nombre, para no confundir QAS con PRO (se pone desde app.js según el ambiente). */
.marca-ambiente {
  color: var(--brand-danger);
}

.topnav-user {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--brand-text-dim);
  font-size: 0.9rem;
  min-width: 0;
}

.topnav-user #user-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 40vw;
}

@media (max-width: 640px) {
  .topnav-user #user-name {
    display: none;
  }
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--brand-text);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--brand-surface);
  border-right: 1px solid var(--brand-border);
  overflow-y: auto;
  z-index: 15;
  transition: left 0.2s ease, width 0.2s ease;
}

.nav-section-label {
  padding: 16px 16px 4px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-muted);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--brand-text-dim);
  text-decoration: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  font-size: 0.92rem;
}

.nav-item:hover {
  color: var(--brand-text);
  background: var(--hover-faint);
}

.nav-item.active {
  color: var(--brand-primary-text);
  border-left-color: var(--brand-primary-text);
  background: var(--tint-primary);
}

.nav-item .icon {
  width: 1.1em;
  text-align: center;
  flex: none;
}

.nav-badge {
  margin-left: auto;
  background: var(--brand-danger);
  color: #fff;
  font-size: 0.7rem;
  border-radius: 999px;
  padding: 1px 7px;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 14;
}

/* ---------- Main ---------- */
.main {
  margin-top: var(--header-h);
  margin-left: var(--sidebar-w);
  padding: 24px;
  min-height: calc(100vh - var(--header-h) - var(--footer-h));
}

/* ---------- Pie de página ---------- */
.pie-pagina {
  height: var(--footer-h);
  margin-left: var(--sidebar-w);
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 1px solid var(--brand-border);
  color: var(--brand-text-dim);
  font-size: 0.78rem;
}

/* ---------- Bottom nav (solo móvil) ---------- */
.bottom-nav {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--bottom-nav-h);
  background: var(--brand-surface);
  border-top: 1px solid var(--brand-border);
  z-index: 20;
}

.bn-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--brand-text-dim);
  font-size: 0.68rem;
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
}

.bn-item.active {
  color: var(--brand-primary-text);
}

/* ---------- Tablet: sidebar colapsado a íconos ---------- */
@media (max-width: 1024px) {
  .sidebar {
    width: var(--sidebar-w-tablet);
  }
  .sidebar .nav-section-label,
  .sidebar .nav-label {
    display: none;
  }
  .main {
    margin-left: var(--sidebar-w-tablet);
  }
  .pie-pagina {
    margin-left: var(--sidebar-w-tablet);
  }
  .hamburger {
    display: block;
  }
}

/* ---------- Móvil: sidebar se vuelve drawer + bottom-nav ---------- */
@media (max-width: 640px) {
  .topnav {
    height: var(--header-h-mobile);
  }
  .sidebar {
    top: 0;
    width: 280px;
    left: -280px;
  }
  .sidebar.open {
    left: 0;
  }
  .sidebar.open ~ .sidebar-overlay,
  body.sidebar-open .sidebar-overlay {
    display: block;
  }
  .sidebar .nav-section-label,
  .sidebar .nav-label {
    display: block;
  }
  .main {
    margin-left: 0;
    margin-top: var(--header-h-mobile);
    padding: 16px;
    min-height: calc(100vh - var(--header-h-mobile) - var(--footer-h) - var(--bottom-nav-h));
  }
  .pie-pagina {
    margin-left: 0;
    margin-bottom: var(--bottom-nav-h);
  }
  .bottom-nav {
    display: flex;
  }
}