:root {
      --cor-principal: #007BFF;
      --cor-escura: #0056b3;
      --cor-cinza: #6b7280;
      --cor-cinza-claro: #f8f9fa;
      --cor-branco: #ffffff;
      --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
      --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
      --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
      --border-radius: 0.375rem;
      --transition: all 0.3s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-family);
      line-height: 1.6;
      background: linear-gradient(135deg, var(--cor-principal) 0%, var(--cor-escura) 100%);
      min-height: 100vh;
      color: #333;
    }

    /* Header */
    header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-sm);
      z-index: 1000;
      transition: var(--transition);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 20px;
    }

    .logo-img {
      height: 77px;
      width: auto;
      border-radius: 50%;

    }

    .nav {
      display: flex;
      align-items: center;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 2rem;
      margin: 0;
    }

    .nav-link {
      text-decoration: none;
      color: var(--cor-cinza);
      font-weight: 500;
      padding: 0.5rem 1rem;
      border-radius: var(--border-radius);
      transition: var(--transition);
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--cor-principal);
      background-color: rgba(0, 123, 255, 0.1);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--cor-principal);
      cursor: pointer;
    }

    /* Container principal */
    .login-container {
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 120px 20px 40px;
    }

    .login-box {
      background: var(--cor-branco);
      padding: 3rem;
      border-radius: 20px;
      box-shadow: var(--shadow-lg);
      width: 100%;
      max-width: 450px;
      position: relative;
      overflow: hidden;
    }

    .login-box::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 5px;
      background: linear-gradient(135deg, var(--cor-principal), var(--cor-escura));
    }

    .login-header {
      text-align: center;
      margin-bottom: 2.5rem;
    }

    .login-logo {
      width: 80px;
      height: 80px;
      background:var(--cor-principal);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      box-shadow: 0 8px 20px rgba(147, 184, 223, 0.3);
    }

    .login-logo i {
      font-size: 2rem;
      color: var(--cor-branco);
    }

    .login-title {
      font-size: 2rem;
      font-weight: 700;
      color: #2d3748;
      margin-bottom: 0.5rem;
    }

    .login-subtitle {
      color: var(--cor-cinza);
      font-weight: 400;
    }

    .login-tabs {
      display: flex;
      margin-bottom: 2rem;
      border-radius: 10px;
      overflow: hidden;
      background: var(--cor-cinza-claro);
      padding: 4px;
    }

    .tab-btn {
      flex: 1;
      padding: 12px;
      background: transparent;
      border: none;
      font-weight: 600;
      cursor: pointer;
      border-radius: 6px;
      transition: var(--transition);
      color: var(--cor-cinza);
    }

    .tab-btn.active {
      background: var(--cor-branco);
      color: var(--cor-principal);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .form-group {
      margin-bottom: 1.5rem;
    }

    .form-label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 600;
      color: #2d3748;
    }

    .form-input {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid #e2e8f0;
      border-radius: 8px;
      font-size: 1rem;
      transition: var(--transition);
      background: var(--cor-branco);
    }

    .form-input:focus {
      outline: none;
      border-color: var(--cor-principal);
      box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
    }

    .form-input.error {
      border-color: #e53e3e;
    }

    .input-group {
      position: relative;
    }

    .input-icon {
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--cor-cinza);
      font-size: 1rem;
    }

    .input-group .form-input {
      padding-left: 45px;
    }

    .password-toggle {
      position: absolute;
      right: 16px;
      top: 50%;
      transform: translateY(-50%);
      background: none;
      border: none;
      color: var(--cor-cinza);
      cursor: pointer;
      font-size: 1rem;
    }

    .form-options {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 2rem;
    }


    .forgot-link {
      color: var(--cor-principal);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .forgot-link:hover {
      color: var(--cor-escura);
    }

    .login-btn {
      width: 100%;
      padding: 15px;
      background: linear-gradient(135deg, #007BFF, #007BFF);
      color: var(--cor-branco);
      border: none;
      border-radius: 8px;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 1.5rem;
    }

    .login-btn:hover {
      background: linear-gradient(135deg, var(--cor-escura), #004494);
      transform: translateY(-2px);
      box-shadow: 0 6px 12px rgba(0, 123, 255, 0.3);
    }

    .login-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .admin-warning {
      background: #fff3cd;
      border: 1px solid #ffeaa7;
      color: #856404;
      padding: 12px;
      border-radius: 8px;
      font-size: 0.9rem;
      margin-bottom: 1rem;
      display: none;
    }

    .admin-warning.show {
      display: block;
    }

    .error-message {
      background: #fed7d7;
      border: 1px solid #feb2b2;
      color: #c53030;
      padding: 12px;
      border-radius: 8px;
      font-size: 0.9rem;
      margin-bottom: 1rem;
      display: none;
    }

    .error-message.show {
      display: block;
    }

    .success-message {
      background: #c6f6d5;
      border: 1px solid #9ae6b4;
      color: #2f855a;
      padding: 12px;
      border-radius: 8px;
      font-size: 0.9rem;
      margin-bottom: 1rem;
      display: none;
    }

    .success-message.show {
      display: block;
    }

    .divider {
      display: flex;
      align-items: center;
      margin: 2rem 0;
      gap: 1rem;
    }

    .divider::before,
    .divider::after {
      content: '';
      flex: 1;
      height: 1px;
      background: #e2e8f0;
    }

    .divider span {
      color: var(--cor-cinza);
      font-size: 0.9rem;
    }

    .register-link {
      text-align: center;
      color: var(--cor-cinza);
      font-size: 0.95rem;
    }

    .register-link a {
      color: var(--cor-principal);
      text-decoration: none;
      font-weight: 600;
      transition: var(--transition);
    }

    .register-link a:hover {
      color: var(--cor-escura);
    }

    .admin-access-btn {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 50px;
      height: 50px;
      background:#0056b3;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 20px;
      box-shadow: 0 4px 15px rgba(120, 141, 233, 0.4);
      transition: all 0.3s ease;
      z-index: 999;
      text-decoration: none;
    }

    .admin-access-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 20px rgba(81, 102, 196, 0.6);
    }

    .admin-access-btn i {
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.6; }
    }
    .back-to-user-btn {
      position: fixed;
      top: 80px;
      left: 20px;
      width: 45px;
      height: 45px;
      background: white;
      border: 2px solid #e0e0e0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #007BFF;
      font-size: 18px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
      z-index: 999;
      text-decoration: none;
    }

    .back-to-user-btn:hover {
      transform: scale(1.1) translateX(-5px);
      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
      background: #6b7280;
      color: white;
      border-color: #007BFF;
    }

    .admin-warning {
      animation: pulse 2s infinite;
      background: linear-gradient(45deg, #fff3cd, #ffeaa7);
    }
    
    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.8; }
    }

    @media (max-width: 768px) {
      .back-to-user-btn {
        top: 70px;
        left: 15px;
        width: 40px;
        height: 40px;
        font-size: 16px;
      }
    }
    /* Responsividade */
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }

      .mobile-menu-btn {
        display: block;
      }

      .login-box {
        padding: 2rem;
        margin: 0 10px;
      }

      .login-title {
        font-size: 1.75rem;
      }

      .form-options {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
      }

      .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
      }
    }

    @media (max-width: 480px) {
      .login-container {
        padding: 100px 10px 20px;
      }

      .login-box {
        padding: 1.5rem;
      }
    }