:root {
        --color-primary: #1E40AF;
        --color-secondary: #2563EB;
        --color-background: #FFFFFF;
        --color-surface: #F9FAFB;
        --color-text-primary: #111827;
        --color-text-secondary: #4B5563;
        --color-border: #E5E7EB;
        --color-accent: #FACC15;
        --color-error: #DC2626;
        --color-success: #16A34A;
        --font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
        --radius-sm: 4px;
        --radius-md: 8px;
        --radius-lg: 12px;
        --spacing-xs: 4px;
        --spacing-sm: 8px;
        --spacing-md: 16px;
        --spacing-lg: 24px;
        --spacing-xl: 32px;
      }

      * { box-sizing: border-box; }
      
      html, body {
        margin: 0;
        padding: 0;
        font-family: var(--font-family);
        color: var(--color-text-primary);
        background: var(--color-background);
        font-size: 16px;
        font-weight: 400;
        height: 100%;
      }

      .auth-page {
        background: var(--color-surface);
        color: var(--color-text-primary);
        font-family: var(--font-family);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
      }

      /* Header simplificado */
      .main-header {
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
        color: #fff;
        padding: var(--spacing-md) 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      }

      .header-container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 var(--spacing-lg);
        display: flex;
        align-items: center;
        justify-content: space-between;
      }

      .logo h1 {
        margin: 0;
        font-size: 1.5rem;
        font-weight: 600;
        line-height: 1;
      }

      .logo .tagline {
        font-size: 0.875rem;
        opacity: 0.9;
        margin-left: var(--spacing-sm);
      }

      .btn-voltar {
        background: rgba(255, 255, 255, 0.15);
        color: #fff;
        text-decoration: none;
        font-weight: 500;
        padding: var(--spacing-sm) var(--spacing-lg);
        border-radius: var(--radius-md);
        transition: all 0.3s ease;
        border: 1px solid rgba(255, 255, 255, 0.2);
      }

      .btn-voltar:hover {
        background: rgba(255, 255, 255, 0.25);
        transform: translateY(-1px);
        color: #fff;
      }

      /* Container principal do login */
      .login-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: clamp(18px, 3.2vw, 36px) clamp(18px, 3.2vw, 36px);
        flex: 1;
        display: flex;
        align-items: center;
      }

      /* Layout */
      .auth-layout {
        display: grid;
        grid-template-columns: 1fr min(520px, 38vw);
        gap: clamp(18px, 2.8vw, 28px);
        align-items: stretch;
        width: 100%;
      }

      @media (max-width: 992px) {
        .auth-layout {
          grid-template-columns: 1fr;
        }
      }

      /* Aside promocional */
      .auth-aside {
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
        color: #ffffff;
        border-radius: var(--radius-lg);
        box-shadow: 0 8px 28px rgba(2, 8, 20, 0.12);
        padding: clamp(24px, 4vw, 48px);
        display: flex;
        flex-direction: column;
        justify-content: center;
      }

      .auth-aside .display-6 {
        line-height: 1.1;
        font-weight: 700;
        margin-bottom: 0.5rem;
      }

      .auth-aside .text-white-50 {
        color: rgba(255,255,255,0.85) !important;
        font-size: 1.1rem;
        margin-bottom: 2rem;
      }

      .auth-aside .benefits {
        margin: 0;
        padding: 0;
        display: grid;
        gap: clamp(16px, 2vw, 20px);
      }

      .auth-aside .benefits li {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: clamp(12px, 1.5vw, 16px);
        align-items: start;
      }

      .auth-aside .benefits .icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: rgba(255,255,255,0.18);
        font-weight: 700;
        font-size: 0.9rem;
      }

      .auth-aside .benefits .title {
        font-weight: 600;
        color: #ffffff;
        margin-bottom: 4px;
      }

      .auth-aside .benefits .subtitle {
        color: rgba(255,255,255,0.85);
        font-size: 0.95rem;
        line-height: 1.4;
      }

      /* Cartão de autenticação */
      .auth-card {
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        box-shadow: 0 6px 24px rgba(2, 8, 20, 0.06), 0 2px 8px rgba(2, 8, 20, 0.04);
        background: var(--color-background);
      }

      .auth-card .card-body {
        padding: clamp(24px, 4vw, 48px);
      }

      .auth-card .card-body h2 {
        font-weight: 700;
        color: var(--color-text-primary);
        margin-bottom: 1.5rem;
      }

      /* Formulário */
      .form-label {
        font-weight: 600;
        color: var(--color-text-primary);
        margin-bottom: 0.5rem;
      }

      .form-control {
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: clamp(10px, 1.2vw, 14px) clamp(12px, 1.5vw, 16px);
        font-size: 1rem;
        transition: all 0.3s ease;
      }

      .form-control:focus {
        outline: none;
        border-color: var(--color-secondary);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
      }

      .invalid-feedback {
        font-size: 0.9rem;
        margin-top: 0.25rem;
      }

      /* Botão principal */
      .btn-primary {
        background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
        border: 1px solid rgba(30, 64, 175, 0.35);
        color: #ffffff;
        font-weight: 600;
        padding: clamp(12px, 1.5vw, 16px);
        border-radius: var(--radius-md);
        font-size: 1rem;
        transition: all 0.3s ease;
      }

      .btn-primary:hover {
        filter: brightness(1.08);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(30, 64, 175, 0.2);
        color: #ffffff;
      }

      .btn-primary:active {
        transform: translateY(0);
      }

      /* Links utilitários */
      #forgotLink {
        color: var(--color-secondary);
        text-decoration: none;
        font-weight: 500;
      }

      #forgotLink:hover {
        text-decoration: underline;
      }

      .text-muted {
        color: #6b7280 !important;
        text-decoration: none;
      }

      .text-muted:hover {
        color: #4b5563 !important;
      }

      /* Footer */
      .site-footer {
        background: #1e293b;
        color: #f8fafc;
        padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-md);
        border-top: 1px solid #374151;
        margin-top: auto;
      }

      .footer-content {
        max-width: 1200px;
        margin: 0 auto;
        display: grid;
        grid-template-columns: 2fr 3fr 1fr;
        gap: 3rem;
        margin-bottom: 2rem;
      }

      .footer-brand h3 {
        font-size: 1.5rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
        color: #f8fafc;
      }

      .footer-brand p { 
        color: #cbd5e1; 
        font-size: 0.95rem; 
      }

      .footer-links {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
      }

      .footer-column h4 {
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 1rem;
        color: #f8fafc;
      }

      .footer-column a {
        display: block;
        color: #cbd5e1;
        text-decoration: none;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
        transition: color 0.3s ease;
      }

      .footer-column a:hover { 
        color: #fff; 
      }

      .footer-social h4 {
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 1rem;
        color: #f8fafc;
      }

      .social-links { 
        display: flex; 
        gap: 1rem; 
      }
      
      .social-links a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        color: #fff;
        text-decoration: none;
        font-size: 1.2rem;
        transition: all 0.3s ease;
      }

      .social-links a:hover { 
        background: rgba(255, 255, 255, 0.2); 
        transform: translateY(-2px); 
      }

      .footer-bottom {
        max-width: 1200px;
        margin: 0 auto;
        padding-top: 2rem;
        border-top: 1px solid #374151;
        text-align: center;
        color: #9ca3af;
        font-size: 0.9rem;
      }

      /* Responsividade */
      @media (max-width: 992px) {
        .auth-layout {
          grid-template-columns: 1fr;
        }
        
        .auth-aside {
          display: none;
        }
      }

      @media (max-width: 768px) {
        .header-container {
          padding: 0 var(--spacing-md);
        }
        
        .logo h1 {
          font-size: 1.25rem;
        }
        
        .logo .tagline {
          display: block;
        }
        
        .btn-voltar {
          padding: var(--spacing-xs) var(--spacing-md);
          font-size: 0.9rem;
        }
        
        .login-container {
          padding: clamp(14px, 3vw, 20px);
        }
        
        .footer-content {
          grid-template-columns: 1fr;
          gap: 1.5rem;
          text-align: center;
        }
        
        .footer-links {
          grid-template-columns: 1fr;
          gap: 1rem;
        }
        
        .social-links {
          justify-content: center;
        }
      }

      @media (max-width: 480px) {
        .site-footer {
          padding: 2rem 1rem 1rem;
        }
        
        .auth-card .card-body {
          padding: 1.5rem;
        }
      }