/* Header padrão (modo claro) */
.header{
  background: linear-gradient(135deg, var(--primary, #059669) 0%, var(--primary-dark, #047857) 100%);
  color: #fff;
  padding: 2rem 0;
  text-align: center;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 50%, rgba(255,255,255,0.05) 100%);
  pointer-events: none;
}

.header h1{
  font-size: 2.5rem;
  margin-bottom: .5rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}

.header p{
  font-size: 1.1rem;
  opacity: .9;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Variantes de header */
.header.help-header {
  background: linear-gradient(135deg, var(--secondary, #3b82f6) 0%, #1d4ed8 100%);
}

.header.generator-header {
  background: linear-gradient(135deg, var(--accent, #f59e0b) 0%, #d97706 100%);
}

.header.main-header {
  background: linear-gradient(135deg, var(--primary, #059669) 0%, var(--primary-dark, #047857) 100%);
}

/* Modo escuro */
.dark-mode .header {
  background: linear-gradient(135deg, var(--bg-dark, #0f172a) 0%, #1e293b 100%);
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.dark-mode .header.help-header {
  background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
}

.dark-mode .header.generator-header {
  background: linear-gradient(135deg, #b45309 0%, #92400e 100%);
}

/* RESPONSIVIDADE COMPLETA */

/* Tablet Landscape (1024px e menor) */
@media (max-width: 1024px) {
  .header {
    padding: 1.75rem 0;
  }
  
  .header h1 {
    font-size: 2.2rem;
  }
  
  .header p {
    font-size: 1rem;
    max-width: 550px;
  }
}

/* Tablet Portrait (768px e menor) */
@media (max-width: 768px) {
  .header {
    padding: 1.5rem 0;
  }
  
  .header h1 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
  }
  
  .header p {
    font-size: 0.95rem;
    max-width: 500px;
    padding: 0 1rem;
  }
  
  /* Ajustar container para mobile */
  .container {
    margin: 1rem;
    padding: 1.5rem;
  }
}

/* Mobile Large (480px e menor) */
@media (max-width: 480px) {
  .header {
    padding: 1.25rem 0;
  }
  
  .header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    padding: 0 0.5rem;
  }
  
  .header p {
    font-size: 0.9rem;
    max-width: 100%;
    padding: 0 1rem;
    line-height: 1.4;
  }
  
  .container {
    margin: 0.75rem;
    padding: 1.25rem;
  }
}

/* Mobile Small (360px e menor) */
@media (max-width: 360px) {
  .header {
    padding: 1rem 0;
  }
  
  .header h1 {
    font-size: 1.5rem;
    padding: 0 0.25rem;
  }
  
  .header p {
    font-size: 0.85rem;
    padding: 0 0.75rem;
  }
  
  .container {
    margin: 0.5rem;
    padding: 1rem;
  }
}

/* Orientação Landscape em mobile */
@media (max-width: 768px) and (orientation: landscape) {
  .header {
    padding: 1rem 0;
  }
  
  .header h1 {
    font-size: 1.8rem;
  }
  
  .header p {
    font-size: 0.9rem;
  }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .header::before {
    background: linear-gradient(45deg, rgba(255,255,255,0.15) 0%, transparent 50%, rgba(255,255,255,0.08) 100%);
  }
}

/* Preferências de movimento reduzido */
@media (prefers-reduced-motion: reduce) {
  .header::before {
    transition: none;
  }
  
  .header h1,
  .header p {
    transition: none;
  }
}

/* Modo de alto contraste */
@media (prefers-contrast: high) {
  .header {
    border: 2px solid #000;
  }
  
  .header h1 {
    text-shadow: 2px 2px 0 #000;
  }
}

/* Suporte a modo escuro automático */
@media (prefers-color-scheme: dark) {
  .header:not(.header-initialized) {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  }
}