.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-sm {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  background: var(--color-bg-primary);
  color: var(--color-text-inverse);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-inverse);
  letter-spacing: -0.5px;
  text-decoration: none;
}

.header-brand span {
  color: var(--color-accent);
}

/* Logo ADA en el header: el logo es oscuro (para fondo claro); en el header oscuro
   lo invertimos a blanco con un filtro. */
.header-brand img { height: 46px; width: auto; display: block; filter: brightness(0) invert(1); }
@media (max-width: 560px) { .header-brand img { height: 34px; } }

.header-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-user {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

/* Main layout */
.page-main {
  min-height: calc(100vh - 64px);
  padding: 2rem 0;
}

/* Auth layout */
.auth-page {
  min-height: 100vh;
  background: var(--color-bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-box {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.3);
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo h1 {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-bg-primary);
}

.auth-logo h1 span {
  color: var(--color-accent);
}

.auth-logo p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Footer */
.footer {
  background: var(--color-bg-primary);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  margin-top: 4rem;
}

/* Section */
.section {
  margin-bottom: 2.5rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.375rem;
  font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .header-nav .btn-sm {
    font-size: 0.75rem;
    padding: 0.3rem 0.7rem;
  }
}